DIESEL | How it Works

In this week’s episode of Science Garage, our host Bart breaks away from stereotypes and dives into the nitty gritty details about diesel fuel. Rolling coal is a way of life for many folk, so we take a look beyond the high torque smoke stacks to find out what makes diesel go BOOM. Why are diesel engines more fuel efficient? Why does diesel create smog? And are there any drawbacks to biodiesel regarding global warming? Find out all of this and more! This is Science Garage!
Bart teaches us how cars work by blowing stuff up and cutting things in half. It’s a science show for the car lover who’s easily bored. Join Bart as he explains the science behind everything automotive. This is cars down to the atom. This is Science Garage.
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[@LifeofBoris]

I fuel my rockets with it in KSP

[@mihailmarinov2819]

holy pizdets its the slav king - do you watch this channel often?

[@quintongooden593]

Make a cooking video.

[@GrandTour86]

Is that why the moon mission was a failure?

[@Stoppeeping397]

Oh blin

[@no_4259]

Life of Boris see people, this is the kind of comments I like to see. Not Justin something spam in every comment section. BTW hello Boris, how is the blinmobile going lol

[@paolodigualtiero3251]

Diesel is like nuclear: everybody hates it for no particular reason but it's actually better than most other alternatives

[@jmstudios457]

Yep

[@obi-wankenobi9871]

Yes, but actually no.

[@angel-ec1jc]

@Jeff Butt there is nothing bad about nuclear energy

[@Chevsilverado]

Jeff Butt what did he say that made you so angry

[@Chevsilverado]

Jeff Butt now when done properly, which most nuclear energy is, nuclear energy is pretty damn clean and it doesn’t require a ton of precious materials. Old nuclear power was inefficient and people didn’t know how to dispose of the waste and minimize the adverse effects. Today, nuclear is quite a bit better than coal or something like that. Now there are better ways, like hydro, but nuclear isn’t the looming evil power source that some people make it out to be. Using nuclear to power electric vehicles is a lot less impactful on the environment than using coal to power electric vehicles, or using gas powered vehicles.

[@carsonbode8394]

My aunt had more strokes than that engine

[@awfrick2118]

fuck this was edgy

[@TheRealMikeWilly]

Black_Rhino 241 yea you are. How dare you disgrace Pepe by using his likeness as your photo spewing hate. Pepe doesn't spew hate.

[@bigballs6944]

😂😂

[@coop1156]

Black_Rhino 241 haha

[@Blacked_OutMedia]

Bruh

[@claytonbourne8967]

I miss science garage. Seems like we haven't had one it FOREVER. Bring it back!

[@cowsgomoo4917]

If they bring it back it won't have Bart, he left donut sadly.

[@knowthyself6864]

He’s kinda hard to listen to.

[@707king]

Cowsgomoo I was wondering if he left. I wonder why?

[@cowsgomoo4917]

@@707king they never really said, I think he posted on Instagram about it awhile back

[@iussf]

Ali Mohammed Dib that’s not a reason to stop making videos

[@mardukabaddon5527]

why can't school be like this?

[@dillonh321]

Teachers are too underpaid to be so energetic.

[@rustywastakenwastaken]

@@dillonh321 we need to pay them more so that school can actually be enjoyable

[@texasrose8477]

No kidding then I would actually like school

[@zoltan1953]

You can literally learn all of this in school. You were just too busy talking.

[@zoltan1953]

@Cooper: The world’s least-smart poodle I see. In that case, you can't exactly buy a personality. I understand that there are some teachers who are just terrible and ruin the entire learning experience, but with the exception of those cases, if you are really interested in a subject, you should be able to have fun learning about it whether your teacher is as energetic as this guy or not.

[@theuglynakedguyfromfriends8134]

If Diesel is cool and mighty why isn't there a Diesel 2

[@thecooniverse8852]

There is a diesel number 2....sold all year round at the pumps

[@BenchD]

Diesel euro 2,3,4,5 and currently 6

[@M_W_M_A]

@@BenchD Coming soon 7

[@emanuelu2648]

Erron Morgan r/ihavereddit

[@mrnqr2001]

Bio-diesel??

[@armintheboi4935]

Petition to bring Science Garage back!

[@jojouzimaki705]

Is Bart every coming back?? Science garage was my favorite donut media show!

[@bcdieselsofficial]

I’m in!!!

[@Diospectre]

Bring Bart Back.

[@streettraction9405]

BRING IT BACK

[@unsolve9162]

Surprised you didn’t mention how it makes a lot of torque and not a lot of horsepower so that’s why Diesel engines commonly have turbos

[@Dop4miN]

Could you explain why, please?

[@tacos6915]

@@Dop4miN Well it's a really complex subject but basically since Torque is the result of force x distance and in diesel engine the combustion is made by compressing air to create heat wich then self ignite you inject the fuel at the last moment ( when the piston is at the highest in the cylinder ) in results the piston will travel longer than a gasoline engine ( who needs to let space for the spark and the fuel inside the cylinder ) . So you got more distance in your equation Tq = DxF wich results in more torque For the lower HP for Tq the answer lie in RPM since the Diesel self ignite you can't go at high rpm ( you can watch video of diesel doing 8k rpm you can see that over 6k it start doing a lot of black smoke due to unburn fuel wich is basically useless you could have shift earlier to put yourself in a better rev range but then again those are heavily modified engine ) In a drag race between a diesel and gasoline that both make 100hp they will basically do the same time in a 1/4 mile the diesel goes faster into high power rev since it have a lot of torque but the gasoline engine won't go back to low power rpm once it started you could even never be in low rpm by burning your clutch , in a race tho the gasoline will be better since you can utillize fully the higher rpm by shifting less

[@Dop4miN]

@@tacos6915so basically, the only weakness is due to earlier shifts in the diesel?

[@Dop4miN]

@@tacos6915 btw thx for the detailed answer!

[@sfafsashfdh6589]

SDI GANG

[@knifetoucher]

12 min video about Diesel and not a single Vin Diesel reference... I am dissapoint.

[@skuzzyj]

HUGE JACKEDMAN That's what they want you to think

[@Jellyfishmadness]

Hello dissapoint

[@ag135i]

That diesel which you mentioned drives gasoline cars in the movies that's why.

[@TechTimeWithEric]

Hi Disappoint, I'm dad

[@daffaridhallah5159]

just like pumphrey's dad

[@wilsonvinas5906]

2:26 that gasoline engine needs a timing belt adjustment

[@dancingethanol2035]

Thats one retarded engine ;) ;)

[@maspunchnath7487]

🤣

[@jackbrouillette6975]

lmao I noticed the same thing

[@zoltan1953]

Good eye. I totally missed that.

[@jgreen8339]

Definitely!

[@Its_motion_media]

I didn't understand how good we had it. I hope Bart is well. We miss you :(

[@ryananderwkavich1111]

wtf happened to him

[@Its_motion_media]

@@ryananderwkavich1111 I heard he had a kid and stepped down to spend more time with the family. Not sure if that's true tho

[@ryananderwkavich1111]

@@Its_motion_media thank u

[@saghwteam]

The teacher : Don't play around with laboratory equipment, they cost money! Me and my friends : 6:52

[@ivanlowjones]

Rudolf Diesel's great-great-grandson Vin, is certainly a fine actor in his own right.

[@anthonyhuntley4498]

Vin diesel is Spanish, Not a White guy, just because they have the same last name doesn’t mean they are related, and plus Rudolph’s kid never had a kid soo.

[@ATeam0122]

Congratulations you just picked apart, and took seriously, an obviously sarcastic and quite humorous comment😂 you're the fun killer, huh?

[@anthonyhuntley4498]

ATeam0122 nope! I’m the bullshit killer🤦🏼‍♂️

[@jacobgarrett8307]

@@anthonyhuntley4498 It'S jUsT a PrAnK BrO

[@Jaeeden]

@@anthonyhuntley4498 The joke You

[@intrepidmixedmedia7939]

The delivery is so consistent it's hard to tell when he's leading into a joke or actually explaining diesel fuel. Makes the whole video that much better...I think

[@kcnewton7684]

u forgot to talk about the old 2 strokes not all diesel engines were 4 strokes

[@patsky8319]

K Newton also many ships use two stroke diesels.

[@Lfrperformance]

453 Detroit baby

[@_scary_berry]

And he also didn't talk about glow plugs

[@grey5626]

I learned how to drive on a 1970s Mercedes Benz station wagon that was diesel, with NO TURBO. I still dig diesels, and am getting > 40MPG averages on my 2018 Chevrolet Equinox with a 1.6L 137hp diesel (my 50 mile record was 65.2MPG, but that was when I drove to Colorado in 2019, places such as Nevada and Utah with 80MPH speed limits and long flat straight stretches of freeway helped me determine that 72MPH is about the hypermiling ideal for that car for speed to MPG trade offs, alas California has many windy hilly roads, and tons of stop and go traffic, so I don't experience that kind of efficiency here). I drove a 2001 VW Golf TDi (which was about 90hp) that I bought used with 100,000+ miles on it, for another 150,000+ miles before the transmission ate itself and my mechanics laughed at me about doing more maintenance on a car that already had the 3rd highest mileage of any vehicle they had ever serviced (255,000+ miles wasn't bad, but not 400,000+ miles like that 1970s MB wagon got when I last knew of its whereabouts), I mostly ran that car on B99 biodiesel too!

[@danwarner3527]

As a High School auto shop teacher your videos are amazing! I would have included a short segment about PV=nrT and how this formula helps ignite diesel fuel in the engine.

[@ivane_1429]

What's the Doug score on this bad boy? Oh shit this is donut

[@gioccord6162]

IvanE _14 lmfao for a total weekend score of......

[@MurphyFamily0210]

Doug really likes it but gives it a 30/100 because others might not.

[@jwilli726]

Doug gave the PT Cruiser a "Cool Factor" of 10 originally, but then changed it to a 8.3

[@nomimalone7520]

Doug's voice makes me want to shove pencils in my ears. His videos are way too long. I can't listen to that voice for thirty fucking minutes.

[@johnnyfive5629]

John Williams what??? No way...

[@goodday4221]

can we get a "Petrol if ya nasty" t-shirt

[@wannabem334]

We can only hope

[@leonhaku]

I remember in high school we were going over energy and the class focused on the negatives of Gas and how cars are killing the earth but they made a passing glance at diesel just saying "its just a more efficient gas but its harder to manufacture". Tfw you learn more on YT than in school...

[@DoubtingThomas333]

Diesel fuel takes the least energy to make and it's more energy dense. It's the engines that are more difficult to manufacture.

[@scanialover]

Some renewable energy sources actually harm the environment more

[@automotiveguru6961]

I hate to be “that” guy but you forgot to mention that Diesel Engines produce more low end torque than gasoline engines. That’s why diesels are widely used in industrial vehicles and 18 wheelers. One downside to a Diesel is that they don’t rev as high as gasoline engines.

[@justinkey8832]

the rev limit is easily fixed by a modern transmission. My diesel gets 30 MPG at 75 mph on the highway turning about 2k rpm

[@nolansmith4972]

Because the make way more power at rpms and last a hell of a lot longer

[@nolansmith4972]

Meant to say lower rpms

[@bstevermer9293]

Automotive Guru So your name is not just a clever name??

[@sample3279]

In fact they're capable of revving, I've seen some custom tuned Cummins 6BTs reaching 6500 rpm or Mercedes' OM606 crossing 7000. The Audi R10 Tdi could rev up to 8000. So one is capable of turning them into sporty units actually, the big ass torque comes in useful then.

[@farhan2309]

Power steering how its workkk

[@nootellasandwich3279]

FarhanMaming it's easy dood its hydraulics I think

[@FtRookie]

Hydro = Water Power = Electricity

[@danielbel67]

FT Rookie no it just has the name power because it helps you "power" through the steering

[@danielbel67]

FT Rookie there is electric power steering though

[@z33tanner]

FT Rookie Lmao well by that logic all "power steering" systems in cars are electric, when in reality they are 90% hydraulic...

[@MrChriswooldridge]

I love your channel. The way that you handle all the automotive concepts while James takes care of the various brands. It’s so entertaining and informative.

[@aypeey8831]

0:31 "...or Petrol if you're nasty" killer line :D

[@eurosonly]

My car runs on mountain dew and dorritos

[@jugostran]

eurosonly mine on sewage

[@strawberryroan1941]

I bet it has 69 horse power and 420 foot pounds of torque

[@InitiateDee]

Doritos as in Rotary?

[@tomasalejandroarayaolmedo7477]

eurosonly so you have an rx7?

[@andrewvoegtle6123]

eurosonly I’m guessing it’s a civic then....

[@samantoniak1657]

Congrats on 1 mil. You deserve ten times that.

[@BB-zv8tx]

Sam Antoniak 100 times*

[@volvo7453]

now they almost have ten times that.

[@TopiasSalakka]

Getting close.

[@yoghurtlord1745]

1.55 million more to go!

[@radouane575]

Is Bart every coming back?? Science garage was my favorite donut media show!

[@nismo3871]

probably no, Bart has a family thats why he left

[@rolux4853]

@@nismo3871 but with a family you can still work and you definitely need money to feed hungry kids. He’s was my favorite presenter of donut. Yes he’s also over the top, but in a lovely super enthusiastic way, not in a super dumb way like other presenters with blond dyed hair. Also he’s the one that was really intelligent, which we also can’t say over other specific presenters..

[@joelspaulding5964]

These vids are always educational and engaging in a very Donut-sort-of way...which is a major positive. Need more from this series!

[@mattjohnston2]

I _loved_ my TDI Jetta when I had it. That thing was a bottle rocket! I got rid of mine right before the whole diesel-gate issue thing, though. Honestly, I really hope that bio-diesel gains more popularity. That alone could ease some of the dependency we have on crude oil.

[@djaceproductions]

i gotta say you are very informative but i like how you animate and explain everything , its funny and educational all at the same time

[@abednegomanurung3995]

" Big Daddy Cool Rudolf Diesel" Best name EveR 😂😂😂

[@harrisonfarnsworth4739]

Amen!!!!

[@magnumcipher4971]

Bart was the best host Donut ever had. I wish him well and look forward to seeing him do this sort of thing in the future.

[@themaniac3811]

I learned more from this 11min video than from my *school*

[@jansteen5640]

THE GREAT MANIAC That's because school shoves it down your throat, and you clicked this video so you are interested in it before he starts shoving it down your throat. That helps.

[@GETUPANDGO]

That seems to be the way it goes these days

[@AlexisBravoTV]

The things that interests usually will retain better

[@PropperNaughtyGeezer]

Its 3th or 4th grade in german primary school. 8-10 years old kids.

[@ag135i]

That's why many schools are on the verge of shutdown today, by the way you went to which school? Please tell us if you remember.

[@chillisoda]

I would like to know a little more about camber angles and the pros and cons of different camber settings, love the channel guys, keep up the good work

[@accltdymas6691]

I enjoy this a lot my friend!!! great job!!!

[@WTGamingHD]

With this guy learning is fun. Really good job man

[@autoevolution5550]

RAMCHARGERS

[@desmondmoonbear4143]

I Am Sekou Never

[@cnyautosales382]

Yea stop using like bots nobody cares about ram chargers its all about the broncos

[@JellyDoesZombies]

They never made a diesel ramcharger 🤦🏻‍♂️

[@ThatLooksLikeARake]

Now THIS is quality content. Wonderful work boys.

[@kylegoodman3463]

I love your video playlist Bart! You are the one who introduced me to Donut media through this video series on Snapchat a few years ago aha

[@JS-oi4ti]

Hey thanks for all the good info and is SO FUN TO WATCH !!! AWESOME ! THANKS !

[@gedas3419]

Lpg next! Coz' in Europe it's popular conversion, it's needed a bit more, but it's cheaper by half, so it's economical. Also it works colder. All I know it's gut choice for turbo builds if you don't have e85 for sale near home. Lpg is in every gas stops. And high proof of detonation. Talk more about it

[@Quintinohthree]

Gedas Alekveravičius It's so popular some manufacturers offer LPG variants from the factory.

[@gedas3419]

Quintinohthree but is it in America?

[@ShadoCroc]

You know Bart, Up To Speed with James is cool and all. But science Garage is where I feel home. Really love your explanation and presentation! Awesome videos man!

[@anthonycoffey816]

I took a basic diesel class a while back & enjoyed the heck out of it. Didn't really get far because I grew up old school 350 Chevy muscle style but I think i need to get back into it 🙂

[@__diegoortega__]

This is the dude who got me into donut media, thanks car dude guy

[@loganbrowne713]

Disappointed in the lack of vin diesel jokes 🤦🏻‍♂️

[@Creeperboy099]

I remember I had biology homework and I was talking to my brother as he drove me home about it. I remember saying, “Now that I think of it, diesel is technically a carbohydrate.” Edit: I literally learned more about chemistry and physics through this show and cars in general than anything else

[@RicardoMontania]

Is it though? Curious

[@pinelasefa4995]

@@RicardoMontania Carbohydrates have to contain oxygen Diesel only contains Carbon and Hydrogen. In terms of fuel it might be but not chemically

[@emmanueldipom7183]

Thank you. This is something that I hade to see. I have been trying to figure this out for awhile. Thank you for what you do. You are also funny.

[@na-ec4fo]

You guys should do a video on runaway diesel. Love your enthusiasm

[@angelsimperfi1999]

Love this guy's!! I've learned a lot..gad Damm thank you

[@TheCanadianBubba]

Surprised there was no mention of when Otto was trying to inject coal dust to fire his early attempts... not all these guys were genius from the go !

[@abbas5438]

Bro, such a great way to explain

[@xiv_tm431]

shoutout to this guy for teaching me basically everything I know about car engines and motors

[@gremlincc]

Big Bang Boom R.I.P. Micheal Phelps

[@JustinY.]

It just works

[@sathwikkilari]

Justin Y. 💩💩

[@killersof10]

Justin Y. It is good to know that you are interested in the car scene as well.

[@keeperofeurobeat8421]

Justin Y.'s a car enthusiast?

[@pentilex4338]

Just werks

[@NathanKirby2001]

Justin Y what the fuck are you doing here

[@jesseenterwebs]

Fun and informative, thank you, 2 thumbs up!

[@jesusmariscal4875]

This just got me through a chemistry project, this is why we love donut

[@FirstnameLastname-yg7yu]

I have to drink a bottle of water after watching this video, my throat was parched . Very informative though. Love it.

[@melancholybrocoli9868]

TURBOOOOOODDIIIEEESEEELLLLLLLL

[@LapulgaPTY]

supercharge diesel even better

[@justinzurawski435]

you guys are so good at explaining stuff, wish everyone was like you lol

[@jacksonbangs6603]

Thanks for sharing info about bio diesel.

[@anthonysoza1645]

They think your truck is broken. Haha. Good one man. 😹😹

[@OrianIglesias]

The Acid Rain joke had me dying!

[@Tuxedorunner]

Orian Iglesias 😂😂😂😂😂

[@820Connoisseur]

Best explanation video i've ever seen.

[@Karfix]

Great job guys, awesome video!

[@themaniac3811]

Next: steering . ABS . Electronic stability control/ traction control . Radiator . Automatic transmission . tires (not wheels) . Not necessary- . Gaskets and washers . car safety (airbags and stuff) . Clutch (i think you already made a video about it) .

[@abhikapatil]

THE GREAT MANIAC ay everyone, like this comment

[@youngswhtx1780]

Ohhh yess I was raised with nothing but diesel trucks !! 7.3 and man the smell is awesome lol

[@austinc8846]

He said on foreign cars my Mercedes has a diesel

[@salahel-deen]

your teaching is awesome

[@thergamalbassas67]

that is sick 6:12 this vid helped me understand more about diesel engines

[@futurestranger5389]

It’s so funny to me how the background music is absolutely perfect for the mans personality.

[@garemge]

whats the music?

[@ernestosaldana3078]

Its all about that 5.9 cummins!! 💪👌

[@trackpackgt877]

I don't know why I'm watching this I know how a diesel engine works but I love them I drive one for work every single day 14 16 18 hours a day I've gotten some of my best short naps in the cab of a Kenworth with that big C12 caterpillar purring lol!! I have also had some of the longest hardest days in that cab!! and now I'm buying a 7.3 power stroke diesel I figure my life revolves around diesel engines might as well daily drive one!!!!! Great video brother love your Channel

[@halidehelux5221]

That quick clip of him dual weilding the spray bottles into the flame had me cracking up😂😂😂😂

[@Swervin309]

"...and the adopted Baldwin brother." I can't breathe.

[@LTMCMedia]

We need one of these on suspension. Should cover bags and coils too.

[@keshavathreya5365]

Got that Bio-diesel rep going on @ 4:50 love to see it!!!!

[@GarronGoesGaming]

next thing you know, there's a prius that rolls coal better than your f450. Lmfao

[@GarronGoesGaming]

@hangtime 7190 Yeah I saw that hahaha. Pretty awesome!

[@umhewwo8006]

Rolling coal is so dumb

[@bcdieselsofficial]

@@umhewwo8006 it’s fun, though. Some engines naturally do that.

[@MasterChief-ld2ei]

@@umhewwo8006 its also why the epa is on our ass

[@chaseparmentier5237]

@@umhewwo8006 it's pretty clear you've never rolled coal. It's actually really fun

[@ishouldgetalif3]

there are 2 stroke diesel's as well dude. infact those we're the most common. hot bulb engine's for example.

[@jaarryifleshblood315]

Detroit 2 stroke desiels are amazing!

[@kirk2425]

ishouldgetalif3 👍 Detroit diesel. Most busses powered by the 2 stroke.

[@jaarryifleshblood315]

kirk2425 I love the v12 ones , they sound like a v8!

[@thetrainshop]

GM's Electro-Motive Division until 2015 was using 2 stroke diesels for their locomotives. Starting at 567 cu in per cylinder, 16 cylinder variants putting out 1500 HP, to now 4360 HP in a 16-710 cu in engine. Pretty neat. Though their competitor, General Electric managed to go from 2500 HP 4 strokes to 4500 HP without changing the principal factors of the engine such as bore/stroke.

[@thewidower1]

Just as common as two stroke gas engines. This video over-simplifies The entire process.

[@thefrosty1925]

4:18 this is done intentionally so that by the time the spark has ignited the fuel and said fuel has began to build up some pressure, the piston IS at TDC and is ready to be pushed down. And I think another reason why diesels are more fuel efficient is because once the cylinders are sufficiently heated, it helps in assisting with the ignition of the fuel however I'm only reciting something that I vaguely remember reading.

[@jaime9813]

we need more of this guy Donut

[@1R-excavation]

I would really like to see an episode from this guy on how DEF fluid works. Every coworker or diesel owner or heavy equipment operator cringes and cusses the government when the word DEF gets brought up. Please and thank you

[@oinchadoomandwolfboy]

Well yeah, because it’s shit. (Piss)

[@scanialover]

People here get rid of the SCR because of how DEF harms their cars

[@splooshmccooch2862]

Bart was the best. Rip Bart.(not literally)

[@chielwouterscw]

I see Diesel as the near future for ICEs (unfortunately my government doesn't). Especially 2 strokes because they get hotter and thus a catalytic converter will perform way better. I'm studying automotive engineering right now so maybe I can make a change someday.

[@travismcgreat3823]

I daily drive a 12 valve Cummins and love it. It gets about double (sometimes more if I'm careful) the fuel mileage as my old identical truck with the 360 V8.

[@dumdum7786]

This guys got his facts straight, but I've never laughed less in one video

[@jy4057]

9:23 wtf was that

[@lukejensen3491]

what do you meen it was amazing

[@neogeoveniteo4690]

i had a tuned up td fiat , i bought a bigger turbo, a big intercooler ( maybe too big cause i had to remove a little part of my front bumper to fit it in ) and a good old hks air filter. what a car for a front wheeler. when the turbo kicked in you could literally feel the horses pulling you forward, without the seat i would be kicked in the trunk.

[@trappingbird9899]

im so in love with your job lol

[@masonscheetz6979]

He's mostly right, expect that most engines aren't designed to handle pure biodiesel. The different chem makeup wears out the engine extremely fast and most modern diesel engines require such a fine atomize spray of fuel that pure oil is impossible.

[@douglasburford8452]

The 'Detroit Diesel" 2 stroke diesel was developed in 1938, in production 1939 - 2000

[@malimihlali8377]

i love these DONUT dudes

[@chuchojimenez1576]

hahaha learning never being so funny! love your sense of humor @bidsbardo!

[@intelectua1]

I freaking love this guy

[@NotME535]

There are indirect injection diesel engines as well. The diesel does burn faster in these engine and they are quieter, but the use more fuel and emit more particles. There are direct injection gasoline engines as well, they run stratified charges until half-load or so (depends on conditions) and homogenous charges on more than half-load. Stratified charges cause particles, diesel engines always run stratified charges. Indirect injection gasoline engines always run homogeneous charges and direct injection engines can run on stratified or homogenous charges. Gasoline engines have a 3 way catalytic converter, it needs a lambda value of 1 to be effective and to convert CO, NOx and HC into non polluting CO2 (CO2 is a greenhouse gas, but it is not a pollutant, we breath out CO2), N and H2O. In the gasoline engine lambda value can varie between 0,97 and 1,03 at most. Because a diesel engine never runs at a lambda value of 1, since it always runs on stratified charges, it can't take advantage of a 3 way catalytic converter. It doesn't have so much to do with temperature, although a little, but more that it run on a lambda value above 1. They can benefit of a 2 way catalytic converter, that converts CO and HC, but can't handle the NOx, the nastiest of them. That does not mean they can't be reduced, because the can. An EGR helps cool the cylinders, hence reducing the formation of NOx. Particle filters, NOx traps and ADblue help with diesel emissions, but time marches on. It is not sufficient, at least in Europe. In the near future even gasoline engines will have particle filters in the exhaust, and diesel cars will become obsolete. So will gasoline cars, but not so soon, yet in the near future as well.

[@ivane_1429]

Can you repeat that one more time?

[@NotME535]

There are indirect injection diesel engines as well. The diesel does burn faster in these engine and they are quieter, but the use more fuel and emit more particles. There are direct injection gasoline engines as well, they run stratified charges until half-load or so (depends on conditions) and homogenous charges on more than half-load. Stratified charges cause particles, diesel engines always run stratified charges. Indirect injection gasoline engines always run homogeneous charges and direct injection engines can run on stratified or homogenous charges. Gasoline engines have a 3 way catalytic converter, it needs a lambda value of 1 to be effective and to convert CO, NOx and HC into non polluting CO2 (CO2 is a greenhouse gas, but it is not a pollutant, we breath out CO2), N and H2O. In the gasoline engine lambda value can varie between 0,97 and 1,03 at most. Because a diesel engine never runs at a lambda value of 1, since it always runs on stratified charges, it can't take advantage of a 3 way catalytic converter. It doesn't have so much to do with temperature, although a little, but more that it run on a lambda value above 1. They can benefit of a 2 way catalytic converter, that converts CO and HC, but can't handle the NOx, the nastiest of them. That does not mean they can't be reduced, because the can. An EGR helps cool the cylinders, hence reducing the formation of NOx. Particle filters, NOx traps and ADblue help with diesel emissions, but time marches on. It is not sufficient, at least in Europe. In the near even gasoline engines will have particle filters in the exhaust, and diesel cars will become obsolete. So will gasoline cars, but not so soon, yet in the near future as well. Happy? Ha ha ha

[@NotME535]

Bosch automotive handbook, Tom Denton automobile electrical and electronic systems, Tom denton Automobile mechanical and electrical systems, Tom denton advanced automotive fault diagnostics. But most of that I learnt in college.

[@jammerp226]

What an incredible channel!

[@kinnokleung4910]

I really enjoyed this video!

[@jordankidd230]

“I’m gonna feel bad if Michael Phelps has a stroke now” this statement is not a joke for 2020 viewers

[@rolux4853]

Did the guy actually had a stroke?

[@OhighOSkater]

The flame at 6:12 is so trippy

[@12th.jahlil]

That lil clear wave it had after is what youre talking about?

[@SonnyGTA]

I've found my new channel obsession!

[@StrayGuitarist]

My daily driver is an '01 VW Diesel New Beetle, and I absolutely adore it. Unmodified, it can use biodiesel and it sounds like a big ass truck despite being so small I can't fit in the back seat.

[@natsumoe9151]

Here's the real question Why does diesel smell better

[@9996741699]

Esters are sweet smelling compounds.

[@marieryan7973]

It doesn’t

[@irishsavage8715]

It’s the liberal tears that it produces

[@connorstirling4886]

Tastes better to

[@John-xk6qg]

Its mean the smell of freedom