How Fiat MultiAir Technology Works

[@Fiat500usa_com]

All about the Fiat 500 engine: www.fiat500usa.com/2011/08/inside-2012-fiat-500-engine.html

[@Fiat500usa_com]

Fiat belt drive engines were turning 13,000 rpm back in 1970, so they know something about engine design. Plus, look up Paolo Martinelli.

[@hashbrownz1999]

"your car sucks" "that thing's gonna break, real quick" "is your wallet on fire yet?" "That's a girls car." "Fix it again, tony!" *starts modded abarth* "whoa dude, pretty sick" Everytime, i promise. every. time.

[@ilpatongi]

And then everyone claps.

[@StrongFreeLovin]

doesn't change it's a girls car

[@kayla5829]

@@StrongFreeLovin I didn’t know my car came with a vagina? It wasn’t in the hand book?

[@paavoilves5416]

@@StrongFreeLovin I think you've confused Fiat with BMW

[@looped7979]

The only "girls car" i ever saw are the Mazda Miata NA and NB. Why ? BEACAUSE MY TALL DUDE'S ASS CAN'T FIT IN IT !!! 😢

[@sjon996]

have a fiat punto 2010 . 1.4 multiair buyed it secondhand already driven 13.000 km with it without a single problem and its cheap with fuel which is great for my job

[@PatrickN225]

Same

[@rosalva9976]

Works really well when you rev these engines past 4K their timing changes Valves sounds like a diesel when cold 5w20 is for CAFE I bought it with 65k in 2019 it’s at about 130k If you bought it used I’d recommend shortening the oil change intervals a few times, changing when the oil darkens from honey to brown/black.

[@ChancelotLive]

I have a Dodge Dart with the 2.4L MultiAir, and you're not joking about the diesel sound when it's cold. And it's true, they really come alive past 4k rpm.

[@Bondovw]

My Jeep Compass makes a weird sound when I shift gears like it pings but it is kind of a diesel sound.

[@JonOlaivar]

Stop saying it's unreliable, it's not. If you change the oil on schedule and put in the oil called for, it'll be no different than any other OHC engine.

[@anthonyrybczynski5420]

It is unreliable. More moving parts means more can and will go wrong. Also this is one of the common failures on the fiat 500 for North America. Oil changes will not save you.

[@rayyfendi]

it’s a piece of oil burning shit.

[@JamesClimbs]

Eh. just had my multiair fail at 55k and it's always been serviced early by a very reputable alfa specialist using the correct oil. Just have to go on the alfa forums to see hundreds of cases of early failure.

[@anthonyrybczynski5420]

It is a total junk design. It's a fact

[@1sinister80]

Jon I'm sorry but your incorrect. It burns so much oil and Dodge has a 10k mile oil change intervol in the owners manual. They burn 1 quart every 2k miles when new and not under excessive load. Do the math. And when the engine has 50k miles on it it's normal to get 750 miles per quart under normal conditions and 500 under heavy load. You can't use different oil or you own it. So by design it's a failed motor. There is no 2 ways around it. All to get another couple miles per gallon at the cost of an engine. That's just bad math. Honda does it with VTEC and it doesn't burn a drop of oil.

[@hannahbraelee6941]

A lot of you guys are talking about mileage this, and mileage that... Truth is, you're not buying a Fiat 500 for the mileage or the engine... You're buying it because it's a Fiat 500...

[@ANDREWSAMY562]

Well said

[@SayWhaaaaaaaaaaaaaaaaaaaaaaat]

nobody is buying fiats

[@neubauerjoseph]

@@SayWhaaaaaaaaaaaaaaaaaaaaaaat the problem is someone is spreding rumbers that they are uncool, if you drive them and could spend a week with one that would change your minds. Fiat makes some really great cars, they look good and drive amazing.

[@GxG_TM]

"Guys" don't buy Fiat 500 🤦

[@StaceySweetJones]

@@SayWhaaaaaaaaaaaaaaaaaaaaaaat drug dealers are where I am. Thinking of buying one too

[@quillmaurer6563]

I've been pondering a concept like this for years, envisioning the exact same functions and benefits. Looks like they beat me to it. I was visualizing both intake and exhaust valves, and oil could be piped from a camshaft down in the block to avoid the need for timing belts/chains and the compactness of an OHV rather than OHC. As for reliability, I wouldn't be worried about the reliability of this design general, I see that going the same way as EFI and electronic ignition, which might have been troublesome at first but now are very reliable. This looks a lot simpler than a lot of other variable valve timing systems currently on the market. I would worry about the reliability for a different reason though: because Fiat (now Stellantis), they - in fact any brand under that realm (Chrysler/Dodge/Jeep) - don't have a particularly good reputation for reliability or longevity. More issues with build quality than design. If Toyota or Honda made this it would probably run for 500k trouble-free miles, but they don't tend to be as innovative with new concepts. From what I've seen the Italians are great at coming up with revolutionary ideas but struggle with build quality, while Japanese only make relatively conventional things but they run forever.

[@jpvill4th]

This method of valve actuation will allow the application of true hemispherical combustion chambers to virtually any engine. If you like boxer engines, imagine this with no push rod tubes to ever leak and a hemi head on a VW or Porsche air cooled engine as well as multiple valve configurations.

[@quillmaurer6563]

@@jpvill4th I had that exact thought as well - this would completely open up valve geometry to anything you want, with no constraints by the valvetrain system. I even once tried to mock it up in CAD, trying to design a hemi-head quad-valve cylinder head for a classic Volkswagen Beetle (I daily a Beetle, and actually could see this being retrofitted onto one, plus had an old cylinder head to use as an example), with the four valves radiating out from the hemi combustion chamber. Ran into the problem that this caused valves/oil cylinders of adjacent valves to interfere with each other. A not fully hemispherical but domed combustion chamber, with valves at a shallower angle, could work though. But from what I've read, modern high compression engines actually function better with a wedge-shaped combustion chamber than a hemispherical one. What we see rendered here looks quite clearly like a modified DOHC engine design, with one of the camshafts replaced with this system, but an engine designed for this from the beginning - or even a pushrod engine with a fully new cylinder head (VW Beetle and GM LS come to mind - both are very popular to modify) could have even more potential. And likewise, apply it to exhaust as well. A more mild retrofit to a Beetle would be to use the existing head (two parallel valves), replacing the pushrods and rocker arms with oil cylinders/pistons and pipes. A few billet aluminum pieces could do that. Maybe even could simply plug the pushrod tube openings in the case and connect pipes there, the standard lifters acting as master cylinders. Might need to give them a supply of oil separate from the engine's main oil circuit, perhaps an auto-stick's dual oil pump could do the job. The harder part would be to make the "multiair" aspect functional on the electronic/coding side. I visualize having a very aggressive long-duration high-lift cam (available off-the-shelf from various vendors) and this system applied to both intake and exhaust. Programming - would require some tuning - has both intake and exhaust solenoid close (starting to open the valve, determining both lift and duration) based on RPM (higher lift/duration at higher RPM, less at lower for better torque). And the intake solenoid opening - valve closing - based on throttle position from a drive-by-wire gas pedal, the engine having no actual throttle. Actually none of this would be all that difficult, probably more feasible than attempts at a DIY pneumatic Freevalve.

[@burkett1983]

For all saying it should have direct injection, I argue that direct injection has the potential to have problems down the road due to carbon build up, Direct Injection doesn't allow gasoline to clean the port or have enough time to allow the detergents in gasoline to do what they are designed to do.

[@johnnydrakos6407]

Use a oil catch can my guy

[@rmta2025]

It does not have direct injection but standard MPFI (injectors in the intake manifold)

[@stevey500]

@@rmta2025 The newer 1.3 multiair is running direct injection. I wonder if they are combining port injection to keep intake valves and ports clean, nissan does this and is working well for them, I'm sure others do too.

[@varmastiko2908]

Not having direct injection is a huge benefit for long term ownership. Carbon buildup is bad news and cleaning it can be risky. What's worse, it can't be 100% eradicated from any production engine unless using separate indirect injectors which only a few manufacturers do. Long term reliability is not something most manufacturers strive for these days.

[@sidneysanders5726]

My wife has a jeep renegade with the 1.4L turbo and 6 speed manual. Its pretty fun to drive! Love the technology with the multiair, and its really cool that this is a gas engine that doesnt have a throttleplate

[@Draxindustries1]

These Multi Air engines are brilliant. The owners who have problems cheap out on servicing and then condemn this engine when it breaks down. These engines need fully synthetic 0w30 multi air specific oil. Change the oil and filter regularly like every 5k miles and the internals of the engine will stay like new. The 18k mile oil change interval should be ignored. An oil and filter change is a very cheap way to keep the engine healthy.

[@anina2]

I love my Fiat 500L

[@Farahcarrera]

Same!

[@xrenxshawx]

Good on fuel? My 1.4 alfa gets 30 to 37 mpg uk. Which is 24 to 30 usa. Lovely engine with lots of power the guiletta suprises alot of people at the traffic lights.

[@TheHoth1]

When you look closely the exhaust cam shaft interacts with the rocker arms of the intake valves. Interesting.

[@TheRumJumbie]

I would assume if there's a loss of a valve 'pump' and thus loss of pressure, that valving won't open completely if at all depending on pressure. Also I'd assume the solenoid to default to closed if it fails electrically. It's a clever system, more complex than need be if Aurasystem's full electronically operated system is reliable.

[@cahman8]

TheRumJumbie yes. And oil consumption seems to be a problem also. Low oil will cause the engine to shut down without warning.

[@410cultivar]

@@cahman8 would you stop. You need to read up on what the loss of oil was actually about.

[@GabMacedoo]

The solenoid is actually normally open. If there is a failure, there will be no valve opening.

[@SashaNaronin]

@@GabMacedoo Actually, if the solenoid fails it'll go into full lift mode and the conventional throttle will kick in to control the engine.

[@Chris-oc9wu]

I have a 2015 promaster city van with this engine and the 9 speed. It runs nice and has no problem passing anyone on the highway. Doesn't even hit 9th gear till 85mph. Bye bye.....

[@Superenzocastellan]

This is a great engine. Only time will tell something about reliability, but at the moment is excellent.

[@cahman8]

Seems to have oil consumption problems. Mines using a quart and half between every 6000 mile oil change with 22k miles. There's tons of horror stories of this, many much worse with the engine just shutting down with no warning at all when the oil drops too low. When it comes to warranty work Chrysler claims as much as a quart every 500 miles is acceptable.

[@ericj810]

Yes i notice some oil loss with this aswell. No big deal i check mine at every 2000 miles. Light weight 0w 20 synth oils vaper off more rapidly to. That is to be expected. Like i tell people always check your oil so often in any car you own. Many newr cars nowdays have alot of oil complaints. It is normal. Now a quart at 500 miles or below might be a problem that will need attention i would say.

[@1sinister80]

I''m sorry but your incorrect. It burns so much oil and Dodge has a 10k mile oil change intervol in the owners manual. They burn 1 quart every 2k miles when new and not under excessive load. Do the math. And when the engine has 50k miles on it it's normal to get 750 miles per quart under normal conditions and 500 under heavy load. You can't use different oil or you own it. So by design it's a failed motor. There is no 2 ways around it. All to get another couple miles per gallon at the cost of an engine. That's just bad math. Honda does it with VTEC and it doesn't burn a drop of oil.

[@truthserum5310]

@@1sinister80 I concur. My GF has a Dart GT with the Multi-Air 2.4, and I've maintained it well for her with the proper oil (I'm a mechanic by trade), and it's a POS. Burns oil like mad, and now at 62k miles just outside of the powertrain warranty the VVT Multi-air system took a dump. It's $1,400 part and at least an 8-10 hour job. She should of bought a Corolla or Civic.

[@romeoferri1408]

FIAT THE BEST OF EVER!!

[@jamesbondo5895]

@BEST FWD IN THE WORLD says the guy who failed at wording a 3 word comment and had to go back and edit it.

[@jamesbondo5895]

@BEST FWD IN THE WORLD have we not established that vtech was inspired by fiat and alfa romeo to begin with?

[@jamesbondo5895]

@BEST FWD IN THE WORLD fiat has been using variable valve timing since the 60'. Vtec was literally a variant of their system. Try to read the whole wiki page next time

[@jamesbondo5895]

@BEST FWD IN THE WORLD it's based on a fiat patent from '69, VVT (variable valve timing). The alfa romeo 2000 was the first care to use it in the early '70s. E smettila di strillare che ci sento.

[@jamesbondo5895]

@BEST FWD IN THE WORLD I should hope so. It's about 30 years newer than VVT. As far as multiair, we'll have to see. Too soon to tell

[@Fiat500usa_com]

We will. With a specific power output of 117 bhp/L, the 1.4 L MultiAir turbo sports one of the highest specific outputs in its segments beating the 114 bhp/L for the Mazda Speed 2, 113 bhp/L for the MINI S and 100 bhp/L in the VW GTI.

[@user-zg4gx9zq9b]

HP/L means absolutely jack shit on a turbo engine since fuel economy figures under full boost pressure will never come close to an NA engine. More air = more fuel. Simple and plain. To be frank, HP/L is a bullshit figure in general, but thats a separate discussion.

[@Fiat500usa_com]

@@user-zg4gx9zq9b Talking about specific power output = horsepower per liter of engine size. Nothing to do with fuel economy.

[@dlobom]

I have problems getting my foot of the gas as well

[@Fiat500usa_com]

Sorry, the reality is owners get easily over 40mpg. Check the forum out.

[@piperpilot26]

It's the absolute truth. I recently bought a 2012 Fiat 500, and I've consistently averaged 40mpg.

[@1sinister80]

It does but reliability is key. How much is an engine every 50k miles? Do you save 5k in fuel to replace said engine? Buy a Honda or Toyota same price same fule economy or better and they last.

[@SashaNaronin]

Punto Evo no turbo, 37 mpg on road trip.

[@Fiat500usa_com]

@@1sinister80 Is it Toll or Troll? LOL. Couldn't resist and just kidding;) Sorry, but the engines last as long as any other modern car.

[@thatguy1919]

Fiat500USA.com no they don’t

[@alexisamtosta]

One of the best engines in the market. As soon as it came out, it won an award. Its Fiat and the sure know how to build engines.

[@grahamrothphotography]

its like VTEC but electronically controlled

[@AudioThings]

VTEC is a copy of VVT (variable valve timing) made by fiat / alfa romeo. So, multi-air is a more advanced VVT, and VTEC is just a copy-paste from fiat's VVT.

[@410cultivar]

And multi air can make the valves open multiple times per stroke

[@badermohamed32]

Without the high lift....

[@TheIrishPhantom]

Question... Can it keep the intake valve open as long as it wants to? In other words does the solenoid store the pressure it gets from the camshaft? Is it something that could simulate a bigger race/performance camshaft that can simply be programmed in? Or does it only have infinite control over the intake valves while camshaft pressure is applied to the solenoid? Sorry if I didn't word this right... hopefully somebody gets it lol.

[@JonOlaivar]

I see what you're saying, but I'm not sure. I don't think the solenoid has the ability to stop the oil flow (hold the valve open) as this would likely cause problems on the camshaft side by creating suction in the oil passages.

[@410cultivar]

This is a question a lot of guys like,me are asking that want to modify the 2.4l darts. Like do we just need a cam kit with bigger exaust lift/duration and then tune the computer to adjust how much intake lift and duration is used at different throttle positions/rpm ranges? Either some tech company is going to break open the flood gates or this engine is going to be a engineer disaster

[@marcopolo8584]

So it's freevalve but instead of being lighter and simpler, it's more complex and heavier, likely more expensive too.

[@natebuhler5612]

It's not really more expensive tbh, and I've had one for a while now with no issues

[@sandeepjoshua3019]

India's most favorite engine of all time.

[@Roboticpycotic]

Ok so this changes how far the valves open similar to valvetronic but through oil pressure in between the follower and the valve.

[@BrodeyDoverosx]

More closely resembles the VVEL by Nissan/Infiniti.

[@ianchesney9639]

does this tech make the engine more susceptible to failure? it seems pretty complicated.

[@MaverickM1]

+Ian Chesney Not complicated at all. First it was the variable intake valve timing used in early Alfa Romeos, then Honda made (70yrs after) the vtec control, where the old mechanical timing was changed to an electric one, but for all the intake valves in a moment. Now, MultiAir re-invented the electromagnetic valve control, and now both intake and exhaust valves for every single cylinder are timed separated for the best combustion.(PERFECT CONTROL) The point is, the valve control in the regular engines is the worst of all. :D But this was usually used in the last 100 years (where a spring pushes back the valve during its closing state, and a biig problem is: it need always the same time to do that, so the valve opening with the speed of the shaft, but closing with the speed of the spring rebound... And additionally another limit for this technique is the limited rev possibilities. That's why the Desmodromic valve control (used by Ducati) is far better. But somehow in the bike industries and in the car industries too, nobody gives a s*** :D It's a strange stupid world..) Actually, it's a trivia, build in more components for a function can always be a source of failure. But: these or similar components (vti, vvti and so on) ARE in the car engines since the early 90's, and so they are very very reliable even in a Suzuki swift, or any other cars from the cheapest brands, i think it's not a big risk. Don't forget, in small cars there are much better tested solutions to find, because the car companies are selling tons of them. If we have to fear something, it's the TDI.... (nitrogen oxide lie, oil pump drive shaft failures, etc..)

[@ianchesney9639]

yes that is another whole thing fiat is exploding and i hope that their reliability goes down the drain, because there trying to produce as high as the demand. and thank you for explaining the function of the multi air engine! very different approach, than what im used to seeing.

[@varmastiko2908]

The multiair unit can fail but usually only does so with high mileage if using wrong type of oil. And if replaced, it rarely goes wrong again.

[@999benhonda]

This is a very complex way to achieve multiple valve timing profiles. Why is it only used on the intake and not the exhaust side as well? Mr. Koenigsegg has figured out a way to do what multi air does (and more) with a fraction of the parts....not even a camshaft is needed! His system can net 30% more power and 30% more millage.

[@hlq16]

would you really trust a niche company, which tries to sell you electro hydraulically actuated valve systems in an internal combustion engine? To me those systems have to be seriously rugged to withstand the shear temperatures of high performance engines and I don't think I would trust a small company like koenigsegg to make it so

[@999benhonda]

a small company, with lots of money. Its not hydro...pneumatic. There are hydro systems which function the same way...just with fluid instead of air which are used on massive freight tankers. Why would you think a pneumatic actuator wouldn't hold up when things like fuel injectors basically open/close very fast via a electrical signal and sit right on top of the motor and last a very long time? And if we ever get to see this system in every day cars, it will be when the big car companies adopt the tech. But, I wouldn't hold my breath, they are not likely to adopt any system that is less complex, more reliable or is better MPG. They care more about profits than improvements. Koenigsegg is great because improvements in tech matter more to him than money. It is rare to have a inventor as the owner of a company.

[@hlq16]

But injectors aren't present in the combustion chamber, they don't feel the heat, and you are kinda wrong a company which cares about its profits, Renault, tried to make a camless engine. For their formula 1 engine iirc, and they failed. And Koenigsegg isn't on the bleeding edge of technology as some car magazines would have you believe, granted they do stuff the regular car nut wouldn't imagine, but their Regera concept for example used a more advanced form of the gearless electric powertrain used in the lowly Honda insight. However, if Koenigsegg does indeed succed in making a valvetrain which uses oil pressure or an electric motor or a magnetic signal to work instead of a cam, I really hopeit comes to everyday cars, I am tired of spending 10 minutes each day waiting in a line to get petrol.

[@999benhonda]

the pneumatic actuators don't have to be IN the combustion chamber. They have to push the valves. They wont have to deal with any worse conditions than current valve train components do. And I don't see any reason you cant cool them. Koenigsegg from what I have seen is good at adapting and improving tech from one field to another. Giant engines for those cargo boats used electro magnet actuators for the valves. These are massive and even scaled down for a car's valves they would still be too large. pneumatic actuators can do the same job but be far smaller. The major auto makers wont introduce any tech that could hurt their profits. New tech that can bump MPG or HP buy a small amount and increase the number of parts will make them more money. They are making hybrids instead of pure electric not because pure electric cars wont sell...but because pure electric cars wont make much money due to reduced parts sales, no fluids to change, reduced servicing ect. More money is made in parts than in the actual vehicle.

[@samr1321]

+Hasan Luqman Qazi Actually, some believe that Koenigsegg is the inventor of this system. lol

[@2slofouru]

When they graduate to individual air/fuel monitoring per cylinder and individual control, THEN the big gains will arrive. Variable valve tuning is great but you still can't optimally balance cylinder output.

[@badermohamed32]

I have a 2016 Chrysler 200 2.4... it uses the same engine I just need to know how reliable this engine is I had this car for about 3 months now no problems but kind of sketchy at times it burns oil like there's no tomorrow maybe because piston ring bad from factory...

[@neubauerjoseph]

my wife has a 2015 has put like 77,000 miles no issues. with these Italian motors they need a little more love and attention then most cars, but if you give it to them wont let you down.

[@jordandurham8951]

50k multiair unit fails & is replaced, 55k it fails again. It also drinks oil like there’s no tomorrow.

[@velkovskinikola2]

how often do these systems fail. I am kind of afraid since a new module costs about 1000 euro and have seen multiple cars offered for sale where the owners advertise they already had to change it

[@justmechanicthings]

so its just re-invented variable valve timing.

[@PACKyourSHITfolks420]

I like that. It would be nice to put this technology on an older efi car. Then you could have a real car, with great technology.

[@ERICtheLATE]

A 2.8 ltr MultiAir V8 🙌😀🥰

[@jasondriggers2759]

Great except the multiair "brick" can't be serviced. also the solenoids can't be serviced individually so when one does the entire brick has to be replaced at around $1000 just for a new brick not including labor.

[@cahman8]

Can you explain why these engines are so subceptable to oil consumption?

[@410cultivar]

They arnt....the problem was....key word was.....cheap cylinder side wall coating. The oil was heating up(which is normal) but then the piston would ding and scrape the side wall coating because it was weak....giving the oil a path to the chamber and being burnt. Mopar put a new engine in my dart with stronger sidewall coating.....now its fine.

[@keithc5729]

Loose rings and seals to reduce friction. It increases mileage.

[@vonLuk]

A big part is what nobody wants to admit to. They never checked their oil in between 10K mile oil changes, ran their engine low on oil and damaged it. Of course, no one wants to take responsibility so they have to blame someone else. They get their liars for hire involved and sue. You know that's a lot of what's going on here. Not everyone, but a good many.

[@cahman8]

@vonLuk Very true! A person shouldn't have to expect to check their oil regularly in a new vehicle either. By 24k miles I was going through 2-3 qts of oil every 6k miles. Couple that with 28 trips for warranty work in 2 years, damn right I sued! First year 500x, last time I buy a first year car too!

[@murray821]

@@cahman8you know the first few hundred miles is the period where the engine will get its most wear in its lifetime. The break in period should have oil changed after 300 miles and then again after 2000. People thinking they buy a brand new car and then expect to have it maintenance free for 2 years lmfao

[@troymeyer123123]

I've been wondering that for awhile now too.

[@NickZeek1WD]

Hello, Can I use this video to translate in my language and show to my audience in India?

[@zxcbnm7883]

Will make it work please from British accent. It is will be right action... I think.. thanks.. good luck!

[@Marchautowerks]

Is this an interference engine?

[@nikemac84]

So is the 2.4 liter Tigershark "MultiAir" II engine in the Dodge Dart a Chrysler or a Fiat???? I was first informed that it was a Chrysler.......

[@Fiat500usa_com]

It is a Chrysler engine that uses Fiat MultiAir 2 technology. What was Chrysler is now Fiat Chrysler Automobiles so it is all one company now.

[@STONEYG25]

still dodges motor with fiat technology

[@cahman8]

One in the same. Chrysler owns Fiat. Same engines used in multiple vehicles across the Chrysler, Dodge, Jeep, Fiat line up.

NO, Fiat owned Chrysler.

[@salvatorehayes2753]

Can You Imagine If Fiat Chrysler Brought Back The 440 7.2 With Multi-Air On All Valvles!? And With All Todays Technology Like With Fuel Injection, Ignition System, Active Manifold, Multiple Displacement System... etc. It Could Meet Todays Emssions Standards While Still Being A 7.2Liter. You Wouldnt Need To Se Up Timimg Chain... Just Connect The Cams That Power The Oil Pumps For The VVA System. There Probably Will Never Be A Centralized Oil Pump To Supply All Variable Valve Actuators Because Starting Would Be A Pain. The Future For The Valve Train Is This. Lol (What Cam Files You Run?)

[@AMGracing720]

The viper has a 8.4 litre v10 and meets todays emission standards. But i see what your saying That would be awesome.

[@KieranSymes]

Is it me, or are some of the driving shots done with a CGI car over a real background (quite badly actually)?

[@CactusJack252]

Kieran Symes it really takes away from the video

[@SamLFisher]

I have a question. Would it be possible to vaporize the gasoline in a separate area and just suck in the vapor?? Because gasoline vapor is what burns. So wouldnt that be like the ultimate fuel efficiency?? Just wondering.

[@ThorThunda]

Thats what fuel injectors are for. They turn the fuel into a fine mist and inject it straight into the cylinders, ensuring just the right amount of fuel is used. A separate tank to hold vapor would take up to much space and it would need to continually vaporize fuel or else it would settle and turn back into a liquid.

[@SamLFisher]

Scott Staines Why would a canister for fuel vapor be to big?? There are so much wasted space in the engine bay as it is. Having a canister the size of an air cleaner isnt that big of a deal. And I have never seen gasoline vapor settle back into liquid. If that was possible, my gas cans wouldnt build up pressure.

[@VolksTrieb]

the density of the vapor would be hard to control. and controling the fuelammount is very hard...

[@Rumbleghost]

Short answer: Yes, this is what they've been trying to do for the last 100 years. The problem is that the vapour (mist) droplets group up into larger droplets, very quickly, against anything they encounter (throttle plate, intake runners, back of intake valve). As larger droplets, they burn inefficiently. A nice side effect is that they clean and cool these parts in the process. I think you'll find the benefits you are wondering about in fuel systems that burn an actual gas, like LPG or CNG. These burn very cleanly, but have other concerns.

[@vincentk9352]

Solenoid longevity questionable. Electrical Switches wear out quickly throughout history. How was this problem addressed? VVT & lift seems safer to laymen. Horror if solenoid sticks with valve in open position

[@dieselmutt8865]

Really? Who knew? They have been using electric solenoids to control diesel engine injectors since 1989 at thousands of pulse cycles per minute. All this while having no issue for 500k to one million miles of life span.

[@SashaNaronin]

Solid state (transistor) switches have essentially infinite life, provided that they don't overheat.

[@ajjpro25]

Lol at my Dodge Dart that averages 19mpg in the city and 32-36 on the highway, Don't even have a lead foot...

[@cahman8]

ajjpro25 how bad is the oil consumption?

[@410cultivar]

@@cahman8 i don't have oil consumption I got a new generation block put in.

[@cahman8]

@@410cultivar my 16 Fiat with the 2.4 Chrysler multiair has averaged 1½ qts every 6000 miles since the second oil change. Chrysler says it's perfectly normal. They even showed me the bulletin where Chrysler says up to 1qt per 1000 miles is acceptable during the first 50,000 miles at which point it jumps to 1qt every 650 miles as acceptable.

[@111danish111]

can somebody please tell me just when the FUCK will this technology and also direct injection be implemented in the pentastar and the hemi engines ?!?!

[@fv7765]

Garbage! It lasts me to 44,000 miles, Multiair rubber sealant leaking oil. Afterwards one of the sensors of the Multiair failed, third, the Multiair valve signal gave me the error. Got rid of it the Multiair is a great inventor but not so good at reliability! The natural double overhead camshaft is a lot better. By the way, I have service oil regularly on time which causes me problems.

[@batvin88]

did they just lift this of a daimler-benz motor?

[@jordandurham8951]

Fiat have the patent c. 1960

[@miepmaster25]

So it’s SOHC?

[@Fiat500usa_com]

It was originally a twin cam engine, but they removed the intake cam and replaced it with the MultiAir mechanism. Lobes were added to the exhaust cam to help actuate the MultiAir and intake valves.

[@evilcowboy]

Oh cool can you imagine how fucked up an engine with VVT would run if an electronic component popped on the computer and the computer failed. My guess is it will continue to run but you would no longer have the use of VVT and the engine would loose power, torque, and be just an all around dog of an engine. It always scares the shit out of me when a car manufacturer says they will start using a method to electronically control something. Although when it runs it would be more efficient you gotta ask when the computer fails what then. The mark of a good engine in my book is ease of repair, reliability and durability and finally what kind of power can be pulled out of an engine. Who the hell wants an engine that the electronics will probably only last in a real world scenario around 3 to 5 years. Would be a shame to see an engine with this shit not work right because some small capacitor popped. All any engine wants to do is rotate why invent something that allows for the possibility of failure early. Way to throw a theoretical wrench in the top end of an engine when it is not necessary.

[@Knightrem]

How often have you had a EFI fail on you? Contrast that with how frequently you hear people talking about how they just had to rebuild their carburetor for the seventh time in a year.

[@StrongFreeLovin]

It'd be nice video without weird 80's alien music.

[@Fiat500usa_com]

There are millions of engines using MultiAir on the road. Sorry your one engine has an issue. Nearly all issues are caused by poor maintenance, wrong oil or extended oil change intervals. You are exaggerating the costs of replacing the MultiAir unit. The whole assembled unit averages between $500 - $1300 depending on the car.

[@user-zg4gx9zq9b]

Oh so a $1300 part and $1000 in labor after a failure at 75k miles is just "No big deal" to you guys at Fiat? Most cars can get their engines replaced for $2300. You guys mustve stolen some marketing heads from MB and BMW to be throwing out figures like that as if they were chump change.

[@GxG_TM]

🤣 Even their comments are a joke, not just the cars

[@GiveMeThatMango]

maybe someday in 10-20 years

[@ThreepwoodFan]

still no direct injection...

[@karellang8520]

Good for them....direct injection for petrol engines....not so many advantages and many disadvantages....many car producers are using indirect, or returning to indirect....only VW is still using FSI.....also ok, there´re exceptions like lexus.:)) using both in one engine.:)

[@michaelkincaid9582]

Karel Lang Don't forget Ford EcoBoost

[@999benhonda]

Karel Lang you statement may be true for NA gasoline engines. But turbo charged gas engines benefit greatly from DI.

[@darklol701]

+Karel Lang vw has a couple of engines with both injection systems

[@olivier01234]

For me, Direct injection means: burned intake valve at 100k miles, clogged injectors, worn high pressure pump and a horrible tractor-like sound at idle

[@Mooser42001]

Too bitzy! Go for a completely camless system, not adding more parts to the valvetrain.

[@mohamedfarid7499]

multiair do not change valve time . its only change valve lift

[@Fiat500usa_com]

This is wrong. MultiAir technology for the first time allows for variable adjustment of the valve lift , its opening and closing times, the duration and the number of openings. This means the MultiAir system enables the intake valves to be opened and closed more than once during one intake stroke, depending on the load condition and driver requirements - and this for each cylinder separately. This makes MultiAir the world‘s first fully and continuously variable valve control system.

[@tearrificd2786]

Continuously... Looks like it can only open when the camshaft builds pressure for the specific valve, that's not continuously. in that way it doesn't really change valve time in the traditional way rather change duration and opening and closing time during the same window of time instead of changing the window of time completely.

[@Mauro-82]

@@tearrificd2786 Multiair can continuously anticipate the closing of the intake valve and delay the opening (at the price of a reduction of the maximum lift and of an early closure), using a sporty camshaft, for example a 40 ° / 80 °, you only need to reduce for the low and medium regimes as well as to adapt it to the load. You can get a 40/60, a 30/70, a 30/30, a 40/0 etcetera. You can not get a 20/80 but it would not be very useful.

[@robdavis6008]

@@tearrificd2786 trust me, you don't want to open that intake valve outside of a specific window through the engine cycle... destructive things happen when a valve stays open too long or opens at the wrong time. And by continuous, they are referring to the fact that each valve can be continuously manipulated through its specific timing window.

[@robdavis6008]

@@Fiat500usa_com are there plans to further develop this tech and add it to say a V8 for other product lines (dodge charger and challenger for example)?

[@RRReid294]

Go away and do your research fool I have a Punto Evo Abarth with this technology have it in sport mode continuously and drive uneconomically shall we say and get 47mpg easily and i drive on motorways to get to work.

[@10xTnTRevolutionofficial]

Awesome I Really liked your clip! I would love to be Mutual supporters Keep making Videos? #10xTnTrevolution

[@jsmith6589]

That's why a lot of commercial small engines say stay away from synthetic because it can't handle the heat or pressure.

[@akdenyer]

Look like a knock off from the HEUI injection system on the International and ford 7.3 diesel engine. We were looking at electronic valve control 25 years ago at Cosworth. I have a Magnetic valve control system in my head but not going to develop it due to it would just get stolen if it worked. Patents are hardly worth the paper they are printed on.

[@socalpilot1816]

What the fiat?

[@ThePwaro]

lol.

[@cahman8]

SoCal Pilot Chrysler engine

[@danielp16121991]

Very Clever. Would nice to see it on some decent cars though.

[@spinelesschivo]

just another part that will break down it cost a arm and a leg to fix Im sticking to my 1500 cc air-cooled engine in my bug

[@Nebuchadnezzar18]

Nice. Concept however the way they put together in the real world. Is mediocrity at best

[@2slofouru]

more likely minimum lift to prevent bent valves (of course it is fiat, so who knows)

[@Fiat500usa_com]

Fiat has made some of the highest revving engines in the world. 50 years ago they had engines that could spin 13,000+rpm, so they know how to turn revs. If you bend a valve on a Fiat, you've done something stupid. Don't believe the hearsay from idiots of the past.

[@1sinister80]

These engines are absolute garbage. Just do a google search or look up any video with these engines in the Jeeps or Dodge or Fiat. They almost all burn oil and fail prematurely. Dont waste your money. I have my own horror story with a Jeep compass. Failed engine at 32k and at 90k it was on its way out again. My company got rid of it.

[@jsmith6589]

Synthetic oils are a very good way to slowly but surely destroy a engines. People that run synthetic haven't ever torn down a engines with about 50,000 miles of hard use and seen the results anything from gaulded piston skirts to worn bearing to the additives separating and stopping up pick-up tubes, camshafts being starved for oil and probably some tricks that haven't been seen yet.

[@manuelmarcelocastillomendo3296]

xj

[@reelinwithray8193]

Just LS swap it!

[@SprklenStarox]

the gains this system promises are not the future. sorry guys. a 2.4L displacement engine making less than 200hp is not "optimized", as often it is proven that the more powerful these small displacement engines are, it also gets easier to get better mileage with them if you dont have a lead foot. My 07 Cobalt SS Supercharged averages 40+ mpg on the highway at 65, and mid to high 30's for most city driving, unless I WOT lol, but the point is my car is dynoed at 240hp from 2.0L and its killing fuel economy numbers for the 2.4L MultiAir and killing it on the performance side too. Its just shit tech lol, when gains of efficiency for this complicated of a system are in the 10% range.... you know its probably bs marketing.

[@greengrass9572]

The Alfa Romeo Gulia has a 2.0L multiair engine that produces 280 Bhp.

[@mikemiller5839]

The 2.0 is not supercharged. It's turbocharged. And i had a 2008 cobalt ss with the 2.4 ecotec normally aspirated, i averaged 22mpg with the automatic. I just bought a 2017 jeep renegade with the 2.4 and 4 wheel drive and i average 26 mpg, the jeep also weighs 400lbs more than my cobalt, so no, it,s not a shit show.........

[@truthserum5310]

Fix It Again Tony

[@looped7979]

Funny thing tough, they claimed 10% reduction in C02 15% more torque but... Just put E85 in any turbo engine and VOILA you get the same results (if not better) without any technological "innovation" 😂

[@1sinister80]

I'm sorry but your incorrect. It burns so much oil and Dodge has a 10k mile oil change intervol in the owners manual. They burn 1 quart every 2k miles when new and not under excessive load. Do the math. And when the engine has 50k miles on it it's normal to get 750 miles per quart under normal conditions and 500 under heavy load. You can't use different oil or you own it. So by design it's a failed motor. There is no 2 ways around it. All to get another couple miles per gallon at the cost of an engine. That's just bad math. Honda does it with VTEC and it doesn't burn a drop of oil.

[@buildmorefarms1007]

Matt you are silly, you cut and paste the same stuff over and over...but Honda 1.5 T has oil leaking into the gas. www.hondaproblems.com/oil-dilution/

[@TheShamiester]

Yeah fuck all that 😂

[@davichallatorre6178]

LOL if FIAT knew anything about reliability they would NOT have sided with Chrysler... and they wouldnt have had to beg Mazda for a power train in the Abarth Spyder...

[@hashbrownz1999]

The abarth spyder uses the 1.4 multiair..?

[@ilpatongi]

@@hashbrownz1999 Yeah, the hell?

[@boehning]

@@hashbrownz1999 Exactly. Interestingly the 6 speed manual transmission is from the NC.

[@vonLuk]

So wrong. If it wasn't for Fiat, there likely wouldn't be a new Miata. Fiat didn't beg for anything. Mazda is the one that needed a partner. And it is spelled Spider. Do some research before you make a fool out of yourself.

[@bryans8895]

So this has been a pile of heaping garbage in Chryslers and Jeeps. Thanks for the ingenuity but please keep it in Italy, there’s only so many Tonys left to fix these things in North America.

[@vonLuk]

So you are saying there aren't many smart people left in this country? Judging by your "intelligent" comment, you may be correct.

[@peterortiz1280]

a better way to losse time and Jones in this peace of crap

[@AlainHubert]

And that's one more reason why Fiat/Chrysler cars are notoriously unreliable: overly complex design, with too many parts that can fail. Not to mention Chrysler's bad habit of cost saving by producing cheaper parts to begin with.

[@EtaCarinae230]

not true.. fiat engines have high reliability, they have other issues but not engines problems....multi air is the most advanced technology in gasoline engines... honda vtec engines is based on a fiat technology of the '60 (VVT) and used for the first time on alfa romeo in the '80..

[@worldhello1234]

Yeah, but the best way to throw better power and fuel economy out of the window is to not stick to the oil change schedule, so that the mutiair unit has to be replaced for up to 1500 bucks.

[@josephciarlo4366]

haha

[@majesticpaint161]

AlainHubert actually that incorrect the 1.4 has been given awards and has already proven to be reliable. in a study of the top 10 motors Fiat was ranked 7th and beat out ford, Mitsubishi, and mini cooper. or delivers more power per litre than most motors built today

[@AlainHubert]

Wendy wooding I'm sorry but, seeing the name Fiat combined with the word award isn't credible. Awards can be bought. (The best proof of that is the Dodge Intrepid that "earned" the "car of the year" awards from Car And Driver as well as Consumer's Guide, back in 1994, and we all know what a POS that car proved to be in the end). Everything Fiat has produced in the last decade proved unreliable. That's why they had to combine their efforts with Chrysler (another crap making company for decades) in order to try and survive. And it ain't going well so far...

[@yusufkuntoro3141]

like vtec

[@410cultivar]

Except vtech can't open the valves multiple times in one stroke

[@Mauro-82]

No, Multiair can anticipate the closing of the intake valve with continuity, it can also reduce the lift continuously and delay the opening to regulate the amount of air sucked in and increase its speed (delaying the opening also causes a reduction in the maximum lift and an advance in closing, which does not represent a big problem because in the conditions in which the opening is delayed it is generally useful to reduce the lift and to anticipate closing; however it is still possible to further reduce the lift and further advance the closure for reduce the amount of air sucked in). Multiple valve openings are also possible for each cycle to increase turbulence and combustion rate at low loads. I think it can also disable the cylinders but I do not know if it is used, with the multiair you already have a big reduction of pumping losses, so the utility would probably be low. One of the main advantages is that it allows to regulate the power without using a butterfly valve which, when partially closed, causes a big increase in pumping losses and therefore in consumption

[@jacobditmer5579]

electronics are crap on a engine

[@ThePwaro]

Wrong.

[@lucasshaffer3324]

Not always. It depends on design.

[@SashaNaronin]

It's much easier to make reliable electronics than reliable mechanics.

[@tunnellcin2276]

Unrealiable. My 500 Turbo MultiAir Assembly is beginning to fail at only 52k miles with regular oil changes. It would be cheaper just to buy a used Hyundai than it would cost to repair it. Should have got something else...

[@vasilliskontis6330]

Lies

[@tunnellcin2276]

No, it's not lies.

[@Fiat500usa_com]

There are millions of engines using MultiAir on the road. Sorry your one engine has an issue. Nearly all issues are caused by poor maintenance, wrong oil or extended oil change intervals. You are exaggerating the costs of replacing the MultiAir unit. The whole assembled unit averages between $500 - $1300 depending on the car.

[@tunnellcin2276]

@@Fiat500usa_com, it is a common problem with these engines. There are countless forums and post dedicated to the issue. No I'm not exaggerating the cost. You are correct in The pricing of the part, but the dealer wanted almost 3k to replace the part. I could get a used Hyundai for that money.

[@ilpatongi]

@@tunnellcin2276 Just swap a T-Jet head on that engine, no more Multi-Air

[@Alex_Bket]

vvt are better and cost nothing junk usa car

[@numberpirate]

Honda called from 1989, they said you guys are late to the game and pretty much failed. VTEC can be applied to both cams, I-VTEC throws in cam angle phasing, so this is just lame. I understand why Chrysler will go bankrupt for the 3rd time, or 4th, or 5th time, sorry I lost count.

[@OddTimeMan]

+Marcus Taber Fiat was the first auto manufacturer to patent a functional automotive variable valve timing system which included variable lift. Developed by Giovanni Torazza in the late 1960's. So it looks like Honda was late to the game.

[@numberpirate]

Patent vs actually producing. Honda mass produced it first. Ideas are easy to draw, hard to actually accomplish, so Honda was first in its game as they used a novel method that didn't infringe on other's patented ideas. Now why didn't Fiat actually produce that? I have read about that before but really didn't take it seriously because it never went into production. Regardless it looks like Fiat has acquired the STD known as Chrysler and they are starting to sink just as others did when owning that american embarrassment.

[@OddTimeMan]

Marcus Taber Chrysler is an "American embarrassment"??? You're clearly just anti-American. Chrysler innovated MANY things in the automotive industry. They're an American icon and they'll be around for a long time.

[@numberpirate]

An American embarrassment? How many times have they gone bankrupt? How shitty is their engineering? WHO OWNS THEM NOW? Even the krauts couldn't stand owning them, now the Italians are learning about what they can't do. Next up is the Chinese.... Sorry you have a MOPAR hardon, but as of the past 3 decades Chrysler hasn't been living up to what they used to be. And if I was anti-american I would be talking crap about GM and Ford. GM has the same institutional crappiness as Chrysler, Ford got their act together in the early 90s, and I respect them for that. I personally do not like American designed cars. I don't like trucks or SUVs, but I respect what Ford has done. Chrysler just sucks as of late though, bankruptcy, being sold to foreigners, and designing crappy cars as evidenced by realities is my proof.

[@OddTimeMan]

Marcus Taber "designing crappy cars as evidenced by realities is my proof" No, that's called an OPINION. My 2014 Hemi Challenger is far from "crappy". And Chrysler is doing very well under Fiat, whether you like it or not. That's a fact. How many times has Chrysler gone bankrupt? Zero. That's why they're still in business. You see, "declared bankruptcy" isn't the same thing as "gone bankrupt". By the way, GM and Ford have been given enormous government loans in the past too. And guess who still owes them money...Yep, only Ford. www.forbes.com/sites/joannmuller/2012/08/29/automakers-report-card-who-still-owes-taxpayers-money-the-answer-might-surprise-you/#6d761716a8cd