1 stroke engine (2001 design)

This is a video in responce to a question in the Q&A video I did in April. This is an engine design that I worked on for about 18 months back when I was a junior engineer. The concept was to have a diuble ended piston in one cylinder. Because there is one 'piston' per cylinder you could (loosely) call the engine a 1 stroke.
If people are interested in the design and want to know more or have more detailed questions I can do follow-up videos.
In the end the engine has some flaws that are hard to work around, so to this end I abandoned the idea. One of these days I may build the engine as part of a proto-type video series, but we'll have ot wait and see if that ever happens.

[@Mile-long-list]

didn't even watch your video I paused the ad so you get nothing because you're​ stupid. one stroke ? go back to school.

[@dirtygarageguy]

lol what A FUCKING MUPPET. "I didn't watch this video and I thought spending 30 seconds writing a comment was a great idea" close minded knobhead lol Are you a vegetarian? Or even better a vegan? I bet you are

[@TrevorsMailbox]

You wanted to convey to The Workshop and other viewers just how stupid you thought he was and how stupid you thought his idea was...and that's what you came up with? All you could muster, with your infinite wisdom, was "you're stupid" and "go back to school." Judging from your account you don't seem to be a troll, you're just a brilliant person who wants to let everybody know what you think, so I'll help you out. Since you're a genius and far more intelligent than most people your time is valuable. You could be curing cancer or creating a spaceship that runs on house flies, so let's work together and make this KZbin nonsense much quicker. I know you've figured out that if you pause a video during the ad you save time by not actually watching the video, so that's a good start. Now, lets say you're flipping through videos and BAM you see one that infuriates you...you've already paused during the first few seconds of the M&Ms ad (so this moron doesn't get a dime for your click on his or her asinine clip) and you're about to type out a comment letting a video poster know how cripplingly inaccurate his opinions on fidget spinners are. Now this is the hard part, even for someone as strikingly complex and wise as yourself: I want you to try to fathom the immensity of the fuck that I and everyone else here do not give about what you think, then turn your computer off and go do something useful like drowning.

[@bobedwards5893]

The Workshop why question if he is a vegetarian?

[@dirtygarageguy]

The funniest comment ever - you're gonna get a video just for this!

[@dirtygarageguy]

Because eating excessive vegetables makes you pass gas. And its wrong, murdering innocent carrots!

[@joshm7801]

This is beautiful. Not because it's functional or revolutionary- but because it could actually work, and because I myself could never dream of such a creation. Now you should just build it for funsies.

[@dirtygarageguy]

I'm working on it - thanks for the comment - matt

[@maxdavies9958]

I attempted to build a lego version that runs on compressed air and well it sort of worked it ran for a bit but it was very very fast and blew apart but I would like to see the real engine built.

[@ShesSometimesDoubleChocolate]

Uh, Josh, newsflash: if something could actually work, then once it does it already IS functional.

[@gooeyblep]

Hey I might post a video about this soon. I think this engine has a lot of potential but, this design is pretty bad. Not being rude because this served as an excellent example but there are a lot of unnecessary parts

[@honeyglazeham9621]

@@dirtygarageguy Well, Where is it?

[@PetRatty]

Love to see it built and run, great vid. When I worked at a Model shop years ago, we had in a 50cc Swing-piston model aircraft engine, at the time I thought that was a really weird thing.

[@flexyco]

I still think it's a brilliant engine! Probably better for big marine than for high speed. We are very interested and like to see more.

[@DigBipper188]

You should defo see if you can build a semi-running 1cyl prototype of this engine... could be a fairly interesting lil' motor even if it's none too reliable because of the rods. I kinda wanna hear it running at 11K RPM...

[@dirtygarageguy]

Me to dude, I'm thinking about doing a scaled version. - matt

[@ShesSometimesDoubleChocolate]

You (go) to where?

[@ElationProductions]

A double acting steam engine works in a similar way, so in my opinion this isn't a totally bad idea to have thought about.

[@dirtygarageguy]

Very much like a steam engine - matt

[@steamman9193]

Well sort of the piston rod travels through one cylinder cover. Notorious for leaking at steam working pressure would probably be very difficult to seal at combustion pressure

[@adamnellemann2569]

Very good design, have thought about similar myself for decades. Suggestions for when / if you build a prototype: Make it a generator, no rotary output = super-simple! Use several solenoid-windings around (a non ferro-metallic) middle-part of cyl. as power-takeoff / starter, then you can eliminate all rods and shafts etc. Only the free flowing piston will be moving (add perm. magnets or self-inducing solenoid+capacitor between piston-heads). Use small solenoids for exh. valves as well. This way u also gain variable stroke-length / compression - Should be a killer for hybrid vehicles, very high efficiency, very compact & lightweight. Optional: Put the whole thing in another cylinder, floating freely betw. “air-springs” = minimizes oscillation + can perhaps serve as “charge-pump” (perhaps also using solenoid-valves for timing pump to either max. charging or max. osc. dampening or wherever in-between). Glow-plugs might not be req. as you could run the motor with the solenoid / starter without opening valves = will heat cyl. & pist. due compression. Since it’s a generator, rpm (osc. per min.) and torque can be fixed = everything can be tuned for max. efficiency and min. vibration, noise & emissions at that exact speed and load. Also, when u get to making a hybrid vehicle for this engine: Use a bank of ultra-caps. for regenerative breaking, giving you 80%+ regen in build-up areas, as opposed to

[@evoluke1069]

why not put the cylinder(s) on a horizontal plane with the ports on the top to reduce the oil burning issue and oil distribution issue? you would have to re-design the crank and I'm not sure how the horizontal motion would become rotational. No, wait, just rotate the whole thing 90 degrees so it sits like a boxer engine!

[@colewhitmer221]

This is what I was thinking

[@Peron1-MC]

v engines look cooler but yes good point

[@maxanator6]

Luke Offermanns a V engine setup would give this engine a fighting chance in the market. think an engine the size of a V8 would have the power of a 16 cyl engine

[@evoluke1069]

flat 6 would have the power of a V12 then?

[@we4selradio591]

That'd be a Bourke engine for instance.

[@larrylentini5688]

I had to click on this video when I saw it because I've never seen anyone else come up with this idea before. I came up with a very similar 1 stroke engine freshman year in college and presented it for an invention assignment. Mine was less well thought out than yours with a ridiculously complicated mechanical direct injection system and I had 4 cylinders arranged around a Scotch Yoke that doubled as a flywheel and clutch pack to create a compact engine engine that was balanced on all axis.

[@larrylentini5688]

I never did stress analysis either though... I gave it the same effective displacement as a Bugatti Veyron for the sake of my presentation to show how compact it was and I remember looking at the cad model then and thinking "I'm 90% sure there isn't a material in existence capable of handling this kind of stress."

[@hugostiglitz6914]

Stop dissing vegetarian! I'm a vegetarian. Well, I'm sort of a vegetarian, I only eat cows and sheep that eat grass which makes them vegetarian. So if there made out of grass, I'm a vegetarian. So, leave us vegetarian alone!😁

[@anonymouse9879]

lol

[@Lhawk2107]

Your kinda like me and fish... ppl keep telling me to eat more fish ! I always tell them back " ... find me a fish that can pull a wagen ill eat it !" .

[@hugostiglitz6914]

@@Lhawk2107 I know what you mean. Ya know what they say about fish. Give a man a fish and hell eat for a day, give a man a fishing rod and a net and he'll sell them and spend the money on a couple of visits to a posh restaurant.

[@bobthompson4319]

cows cause alot of methane and it's bad for the environment. I was a butcher for 7 years and I helped the environment alot by killing them and then helped to feed people with the meat. I'm a environmentalist. and from what you say I'm also a vegetarian to. I'm really eco friendly. 😁

[@hugostiglitz6914]

@@bobthompson4319 Exactly Bob, good on you for removing this Bovine scourge from the environment. The world needs more Bob's!😁

[@georgestephenson6255]

I love this design because it reminds of old school steam engines since their cylinders are also double acting. I truly believe you should build this engine, and can't wait to see it running.

[@ColaFx]

never gonna happen :D

[@mdsundquist71]

@@ColaFx Why do you say that? I don't see any insurmountable hurdles to making it happen.

[@ColaFx]

@@mdsundquist71 yes, it maybe possible, but i dont believe that this guy is gonna build it.

[@mdsundquist71]

@@ColaFx If he doesn't, I will :-)

[@frostyab7579]

this is not a one stroke engine, it is a double acting piston two stroke

[@hannes_mlbx9599]

No, it's a 1 stroke kinda. On 2 strokes, the piston gets pushed down (first stroke) then comes back up due to momentum (second stroke). So one ignition every 2 strokes. On this design, there is one ignition per stoke, making it a 1 stroke

[@hannes_mlbx9599]

Has the characteristics of a 2 stroke though

[@ferrumignis]

@@hannes_mlbx9599 Fundamentally there's no difference to a two cylinder two stroke though, just the pistons are directly connected together rather than via the crank and rods.

[@FranseFrikandel]

See 1:41 where he literally says "It's not a one stroke, but there's a power stroke every stroke."

[@MichaelSmith-xb5cp]

Four power stokes during a single four stroke cycle makes it a one stroke engine. Thus each piston of a one stroke engine does the equivalent work of a four cylinder four stroke.

[@johnhartley964]

What a genius idea - No wasted motion - I've subbed and will keep watching you

[@dirtygarageguy]

Welcome to the channel dude - matt

[@upsidedowndog1256]

The Workshop SV top tripleclamp trim is Suzuki P/N-99950-70451

[@swabianmotorcycleteam9335]

What a great idea i'm corious about to see the gavel engine run and the data of it.

[@dirtygarageguy]

so am I dude, some day lol

[@ND224]

The Workshop if you lay it flat (boxer style), help with the oil issue?

[@ShesSometimesDoubleChocolate]

Opes, ND, you beat me to it!

[@dubstepTonme]

I like the idea of this motor. Honda had experimented with this and from memory it was horizontally opposed. But the linear motion was used to drive permanent magnet through a coil producing electrical energy too. Nice work.

[@ralphwarom2514]

Build the engine. I guess working out the kinks might be easier when you can touch it.

[@Sexyoldgeraldorivera]

Worth building and giving it a try. If it blows up, fuck it. Explosions are the sound of progress.

[@skankingiant]

I drew something similar out when I was in college 15yrs ago, not to the depths you have, packed it in when my teacher said it was a stupid idea.....

[@maaxyco-420]

In an engineer's view, this is amazing. On the side of worry for unequal oiling, and lubrication of the center. It would seem fiting to lay the cylinder on its side so that "gravity" is less applicable. Then set up an oil dispensing system in the midle, opposite side of the crank joints.

[@maaxyco-420]

Im always thinking weird useful ideas, so if i can think of any other's ill shoot u one. If u have any brain storming questions, please feel free to ask. I need to find an engineering budy.

[@almo29]

Isn't this just a 2 stroke, 2 cyliinder boxer engine with the pisons on 1 side of the crank?

[@6amamoeba677]

AL mo no

[@vegantard_5989]

The same principle has been in use since the 1930's in railways to drive electro-pneumatic points machines and in farmland irrigation with the double acting piston pump. I can sleep soundly tonight knowing i did not stumble across another Leonardo Da Vinci genius on KZbin.

[@kulugtunga5368]

shit i was resently thinking of that engine desing , i was like yes! never heard of it.... now im just sad. still wanna make mini prototype

[@GrahamTruman]

been watching your videos for a while, only just come across this one and have to say the respect i have for you has certainly gone up! Love thinking outside the box.

[@jt-wy8qc]

I really really really like this

[@zombie_slayertcd613]

i always thought of an engine like this though i think of a rocket engine as more of a 1 stroke

[@guerrillaradio9953]

I.E, double-acting 2- stroke engine. Invented over 100 years ago for huge natural gas pumping engines. Works really well, as long as you use a link rod like a steam engine.

[@davidcarpenter8741]

This is a really interesting concept, you should check out the Achates Power Opposed Piston Engine. It has two pistons in a single cylinder, different from this design in that the piston is "split" into two but similar in that it has two separate power strokes in one cylinder!

[@jarodthorman9161]

Who cares if it makes sense. that is cool af man. Your build will be awesome. One thing what would happen if you were to put the cylinder at a horizontal. The extra linkage to the crank would increase the weight but you would solve the heat distribution issue and possibly have a solution to your oil problem.

[@dirtygarageguy]

Very true - matt

[@pgtmr2713]

Double sided cylindrical shaped piston with rings at each end, and a center ring gear around a crank similar to a rotary piston's. Designed to allow the piston to only travel horizontally in the bore, while the crank is free to swing 360* inside or through the center of the piston or pistons. With 2 stroke designed head on each end of the block. have a shallow pan and dry sump and pressurize oil through passages to oil the piston rings, crank bearings and gear rings.

[@grantprankerd1942]

A great explanation . Further research will show you that this is the same style of engine that Richard Pearce of New Zealand had used to power his first Aircraft in 1903 . He used a flat boxer style layout for this aircraft and for his subsequent design produced a radial version of the same . So for all the Naysayers " It's all been done before , only now we have the advantage of much better manufacturing methods and materials ." . good luck . Grant

[@stapuft]

i know nothig about engines, and was doing random research to see if a "one stroke engine" was even a thing, as the way the math works out, it SHOULD be the most efficent type of engine, should they exist, and found they dont, and someone else had the same idea as me, only they ACTUALLY know what they are talking about. cool video, +1sub.

[@johnnelson8956]

How do you seal around the wrist pin? You have to oil the piston somehow. So how would you prevent oil leaks and blowback pressure from your rings?

[@dirtygarageguy]

more on this later

[@rustyguts133]

The first thing I thought of was to rotate the cylinder 90-degrees to the crankshaft; this would help with your oiling but it would mean a 90-degree transfer of power. Other than that your idea has potential; follow it up. We only live once, take a risk...

[@dirtygarageguy]

The main problem isn't orientation, its introducing oil in a ported cylinder (see other comments) I wanted to remove the whole buring oil issue that 2 strokes suffer from as well as other issues I outline in the video - great comment though - matt

[@andrealenk355]

I thought of something with extra tubes and pumps to suck the exhaust extra fast out, but that wouldn’t be reliable this is way better design

[@craigquann]

I'm not an engineer.... but is it possible to use your between the rings oiling with oil inlet and out let ports mid stroke so that the old/hot oil is constantly exchanged for new/cooled oil that returns to the crank so that you have extended service intervals and a larger resavoir of oil. I would think it would prevent the oil from cooking and aid in cooling. As an inlet/outlet at the same instant so the oil is injected in and pushes the hot oil out.... if that makes any sense....

[@michaelglenn2106]

If you gave it a lateral design each side of the piston would have equal oil distribution but you would require another crankshaft or counterbalance in order to balance the engine properly

[@bengarrard2519]

To reduce the issue of oil being pushed into the ports you use a tapered sleeve instead of rings. As for the oil pooling in the lower portion of the cylinder, you can lay it down flat and modify the connecting rod to something similar to a steam train by using a small flywheel in the middle for each cylinder seeing as it's already a 2 piece item. That would turn your horizontal movement into vertical movement for the crankshaft. it would also mean you would need only a very light flywheel on the motor, if any seeing as each cylinder effectively has it's own one built in.

[@macdt21]

1. Lay the cylinders horizontal 2. Use injectors for the fuel 3. Ports or valves for the exhaust 5. Add an oil feed at the top center of the cylinder and return at the bottom center

[@dirtygarageguy]

1. Lay the cylinders horizontal - why? 2. Use injectors for the fuel - it is. 3. Ports or valves for the exhaust - it has we misse 4 5. Add an oil feed at the top center of the cylinder and return at the bottom center - not going to work.

[@Attack.Co.275]

This design in itself is great. Have you considered skipping the spark plugs and going with diesel as a fuel source? it'll help with lubing the cylinder. For temp regulation wrap cooling lines around the cylinder. To touch on the oiling issues is perhaps going with a dry-sump and then run a low and a high pressure oil pumps. Being the crank is going to take that much abuse it'll have to be pretty stout and again at that rate go diesel. It's a great concept! My friend you just about reinvented the wheel. Keep running with it.

[@306champion]

Brilliant idea Mate, I'm not an engineer but I do know that a lot of the best inventions were originally labeled ridiculous, over the top and mad to name a few. Stick with it Mate (I like the way you think).

[@downundertech596]

I am actually very interested to see this built and run though. I had a similar more basic idea. It's great to see someone develope it to a functioning state.

[@ihateeverything3972]

He should have no problems cooling it, atleast theoretically. You could easily hook up a coolant system. I wish I understood this shit more, but it seems like properly lubricating the engine is the biggest issue. Cooling the engine with its supercharger seems doable on today's engines, that's a good idea on its own. I wonder if it's been done already, it's easy and simple; I'd honestly be surprised if that wasn't the case.

[@hamzasadek8134]

I thought about this before but i never put it down on paper. just hours and hours of dreaming. really cool that you had done it already. im no engineer but i love to learn and try to apply those lessons to my stupid ideas lol. Love this channel bro.

[@CGSreptilesandaquatics]

Wold very much love to see this engine built and running

[@tomschwartz6245]

as a mechanic, I believe that if you set up this system in a boxer format and then redesigned this slightly to become a four stroke, alternating the sides of the piston between every two strokes, you would have a very power vs size/weight efficient engine. The only problem with the current set-up is that there is simply too much power being produced within 2 strokes. The wear would be too much. The engine would blow every 2.5-5 thousand miles. If the system was converted to a "semi"-four stroke, the pressure on the components would be reduced. There is the potential for the power to weight ratio of a wankel if these changes were made

[@connorrogers6502]

Not sure if I've got something muddled up here but my OCD is making me ask the question, in the drawing in black the two big ends of the conrods are at the closest to your cylinder but the gavel piston thing is at bottom dead right? so when that crank goes round the piston is gonna go where? further down yes?no? im confused?

[@gizmothewytchdoktor1049]

late here but....gears instead of conrods in the bottom end?

[@mattbrody3565]

You could cool the bottom of the cylinder with some kind of centrifugal impeller attached to the unoccupied spaces of the crankshaft. It would require more complicated oil compartments for the lobes of the crankshaft, but intermittently, you could put something akin to a Tesla turbine on each non-eccentric parts of the crankshaft. Might even be good to have a small housing to funnel the outgoing air.

[@jimmcfarland3446]

I remember when I was a kid (I am 63) there was a Popular Mechanics article about a double ended piston engine. It exhausted in the middle and the exhaust was used as kind of a rocket engine..... Interesting.

[@theclubhouse1209]

use long con rods to cure the side load issue? lay cylinders down (boxer style) maybe? cool idea, nice concept. p.s. mark nope please don't pro create okay? the world only needs one of you!!

[@dirtygarageguy]

LMAO - awesome comment - matt

[@ThatDudeTrent1]

Absolutely fucking brilliant. Have had this idea myself but never built it out this far. If I had the funds and or if I ever do have the funds I'll put up the money for the build.

[@hamstirrer6882]

I know this is a 2 year old video, but seeing the Achates opposed piston engine, that also runs on a 2 stroke cycle, this design could work. It has potential to eliminate a lot of friction and pumping loss (apologies if you explained in video, I have the attention span of a fly), and 2 strokes are making a comeback. The main problems they face are emission based

[@Thomas_Bergel]

Ham Stirrer And today it‘s basically the death of an engine if the emissions are not that great...

[@zacharytellier-hunt7812]

What field of engineering did you study? Curious, looking to go back to school. Been a welder for a few years.

[@dirtygarageguy]

Mechanical Engineering

[@federruchi6147]

nice design, man. admirable. greetings from Argentina

[@jordanjacobs4365]

It's a really good idea, it should be done

[@arose460]

Did you ever work on making a working model?

[@dirtygarageguy]

Not yet

[@TheRabidfan]

Maybe two dowels with a sort of Y connection where the two branches of the Y connect to the piston and the other side to the connecting rods, instead of the full length bar running through the diameter of the piston might do away with the flex issue. As far as the oiling goes, maybe if there was a sort of dead space in the center of the piston (Right in the middle of the two Y branches of the dowels) and the corresponding portion of the cylinder where only oil enters and leaves with no additional ports, it could keep the oil where it needs to be without leaking into ports. This is a really cool design, man. I'd love to see it modeled up!

[@AlexA-qx9pn]

This already exists, a lot of early engine were double acting, the problem with them apparently was airflow.

[@dirtygarageguy]

Thanks for the comment dude, and nice to see someone not being a dick about it - cheers matt

[@Wooskii1]

Is it really necessary for the top and bottom pistons/combustiontion chambers to have the same displacement? could you not connect the crank through the bottom instead of sides? or you could make your piston " capital I" shaped and make it more like 2 separate cylinders for each end of the "I" piston instead of sharing the space... sorry I'm bad at explaining what I mean, need to draw, hopefully you get what I'm TRYING to say.

[@EbonyPope]

Could the lower cylinder just be cooled better by creating bigger galleries for a watercooling jacket?

[@jonahcottrell2879]

Definitely not a stupid idea i could see this thing being extremely efficient would just need some working on to get it to behave

[@jonnysnipes3123]

So basically put a carb on both ends of the cylinder

[@bUtMyRiGhTs]

so you could run them flat and symmetrical with the drive shaft on The Middle and have a 4 physical piston, 8 combustion chamber; flat 4 by 8

[@ddooby9266]

I've seen this design many moons ago while doing expired patent searches.. This dream configuration has been floating around in the ether for eons. It's due time it gets put to work! This configuration is actually in use in a rotating barrel / cam engine called the DynaCam Engine and there's another one called the Barrel Cam Engine..and a few others out there with your same idea in mind and in practice! ;) Enjoy!

[@abiddinlinkchannel7978]

555⁵⁵55

[@theuberindian3988]

Have you considered a version of this with poppet valves? a.k.a making it technically a 4 stroke like 2 stroke (if I am making any sense at all?)

[@dirtygarageguy]

yes. more later

[@lorriecarrel9962]

You obviously have a good idea and it can work very well

[@bartengelen3536]

you could get an oil channel in the middle of the piston with only axis holes between the rings. fill this channel with oil and then if the piston is moving the slowness of the oil will puch oil between the rings and lubricate the cylinder wall.

[@smokey40s]

All great designs started life with plenty of problems....and all problems are there to be overcome. Theoretically this design should work...and work well. Ignore the unhelpful comments. Remember the words of Albert Einstein.. "The difference between stupidity and genius is that genius has its limits. Stick with it and you will get there. Good luck

[@dirtygarageguy]

Thanks for the comment dude - matt

[@timfarry7071]

Why are people calling this a 2 stroke engine? I designed almost the exact same concept myself but with a different power collection system than the crank shaft, and know it is a one stroke. 2 strokes have stroke 1 - power stroke, compression stroke 2 is actually the return stroke which is unpowered and uses power from the crank shaft to compress the gas - this one is coming back fully powered from the other side, not using power. In the two "strokes" it has two power strokes, so 1 + 1 = 2/2 = 1 stroke power... My initial thought was why use crank shafts in the first place, this requires the piston to be as light as possible because it has to change direction very quickly, which is inefficient. A heavy piston (like a potato in a potato gun) has extra stored kinetic energy that can be used to compress the gas at the other end and acts as a brake to reverse the piston direction. If done right, it can be extremely efficient. One problem though is vibration of a heavy piston, although if paired to fire in opposition that can dampen the vibration. Adding more opposing pairs would make it quite smooth. This should be a low speed, heavy piston design, which in itself will be more fuel and oil efficient.

[@jabadahut50]

Can't wait to see when you get a chance to actually build one of these.

[@FranseFrikandel]

I always wondered how well just a supercharged 2 stroke would work, so you wouldn't need crankcase breathing and could run a 4 stroke style lubrication system. Mostly unsure about how well that (and this design as well) would idle, seeing as the supercharger has to be going fast enough to still provide boost (Because both this design or a 2 stroke w/o crankcase breathing can't pull in thier own air like a 4 stroke can)

[@ianlaw1160]

I can't wait to see the final product!!!

[@samuelgarris8733]

reed valves could be used to seal the intake ports to prevent the oil from being burnt

[@dirtygarageguy]

Good idea, I'll have to look into that. One of the iteration that I did had a couple of reed valves in the main inlet port to stop the supercharger from surging but that's a different issue. - Nice

[@connorlewis4183]

Thats actually pretty smart.

[@mikenco]

Watching this with the onset of electric motors, feels like what it must have been like listening to farmers discussing better 'tack and bits' to make their horses work better when steam was emerging.

[@beastman.330]

Haha love it ,you remind me of my school mate who always working on my YAMAHA TZR125 back in the 90s

[@AlienPizza38]

I stumbled upon this video.... Now I’m Subscriber.

[@dirtygarageguy]

Welcome to the channel dude

[@nathanledee3140]

ive had this concept in my head since I was like 5 It just came to me after a couple of minutes of thought its cool seeing this

[@colewhitmer221]

I feel like this would be better suited in a boxer type orientation i.e. horizontal arrangement. Would make the uneven heat soak you spoke of easier to deal with. This would also address the oiling issue as you could place oil ports on top of horizontal cylinder and then have a restricted exit port on bottom. Also, something is telling me that running two crankshafts with horizontal pistons in between them would be beneficial and better utilize the "twice firing" per cylinder. Even with the added weight I think it would be better. Of course having two exterior crankshafts would mean a minimum of 4 twice fire piston assemblies. I think you'd be surprised with the stress/strain/sheer on those long wrist pins, I don't think it would be as much of a problem as you'd think, especially if you utilize most of the surface area. I'm not sure if the supercharger is necessary. Once the engine is at operating temperature I think the momentary vacuum of the evacuating exhaust gases would be enough to pull intake in. I guess I don't see why you would need that extra help moving air through. I don't think positive pressure above ap would hurt any though. Book over, lol. I really like this design.

[@dirtygarageguy]

Thanks for the comment dude, this has all been added to the list for part 2 of the series - matt

[@TurboRichie]

You are a very clever lad! Would love to see this built

[@dirtygarageguy]

Cheers dude lol

[@badpony302]

I like the design. I would suggest you build your engine horizontal, this should help eliminate pooling in the lower cylinder. Use a wrist pin in the piston drilled on each end and plugged on the outside. Pump oil from the crank up to the wrist pin via the rod assembly on one side into a passage in the piston to the cylinder between two rings and scavenge the oil through the other rod back to the crankshaft and into the crankcase case. I would imagine the pressure would have to be pretty low to prevent pumping oil into the cylinders but it may be doable - just a suggestion.

[@brokeasdope]

I started drawing up an engine similar to this fourteen years ago in 2003. I decided to go with a 4 stroke instead of a 2 in order to avoid the oiling issues and my idea was to maybe make it almost like two rotary engines stacked. the biggest issue I found was the short stroke due to the wrist pin going through the cylinder walls. You would have to either have very large diameter pistons to make up the displacement of the cylinder meaning lots of weight or run it at very high rpm to produce power meaning balancing issues, especially since it's already a very heavy assembly. It's a really cool idea but ineffective. I found it would be entirely too expensive for the amount of actual power you would gain.

[@olsonc7022]

based on what you've stated for solving the oil problems would be to add more piston rings, and to create a hydraulic circuit through the area needing oil. this would force oil into the area but also guarantee that little to no oil is getting into the combustion chamber

[@dirtygarageguy]

I'll tackle that in part 2 but I do say why this won't really work in this video.

[@moparman23456]

What if you made the ports super steep so there wouldn’t be any oil deposit for the rings

[@dirtygarageguy]

Lol no, it does work that way

[@MichaelMeyerMotocyclist]

Nice job I love it,. If you mount the cylinder longitudinal axis crossing the crank axis and use a connecting rod that teeter totters on a pivot between the piston and the crank. One end of the teeter totter is he piston the other is the crank. the the crank in the motorcycle would be longitudinal and the heads would stick out he sides like a boxer motor.... fun idea

[@jackscott1036]

What if you in a sense made it like a double acting hydraulic ram?

[@timbabeu2005]

For oiling, what about an oil pump run off the supercharger's shaft? Oil could flow through small ports to supply the oil for the rings etc, then it drains somewhere around the rings for the bottom portion of the piston and it would just be adding a gear rotor style pump to the supercharger to also lubricate the supercharger. Putting the supercharger at the bottom could keep the weight low and the oil pan to hold the oil could be part of the case and the pickup could be kept short. The question would be whether a two stroke with the normal design using the underside of the piston to move air into the combustion chamber would have less frictional loss than the addition of the supercharger and what appears to be a sliding bar connecting the piston to the connecting rod. The conventional two stroke has it's issues, but less rotating parts would mean that it's lighter and should rev up faster. The power output versus weight and size could limit the displacement of the motor and where it could be used. I'm thinking about dirtbikes, chainsaws, places where a two stroke's higher power output versus it's size compared to a 4 stroke make it desirable. To simplify the process, what about a two cylinder boxer engine using the pressure in the crankcase portion of cyl 1 to push the air into the combustion chamber of cylinder 2, and vice versa? As piston 1 is on it's downward stroke, the air is pushed into the chamber of cylinder 2 with the aid of the piston moving up it's creating a lower pressure zone under the piston in cyl 1 lowering pumping losses. Then, as piston 2 moves back up for the compression stroke, it's refilling... You still have two rods moving and you'd have two pistons versus one, but the only additional weight should be a small amount for the skirt and a little material under the wrist pin, though your wrist pins would be shorter than having it extend out the sides, so they could probably be made lighter than one long one would have to be since it would have to be more rigid since you don't have the support right next to the connecting rod like you do on a normal piston/connecting rod setup.

[@GAS-OR-ASS]

I believe it's a good idea. But it's complexity maybe is a drawback, because it may be more expensive to produce. I believe euro 4 regulations, about emissions make manufacturers think ideas like yours and even better based on your idea. I believe this engine is something witch worths a try. Main benefits as direct injection are very important to consider. It may have some issues, like heat transfer to environment, may the wrist pin gets quickly damaged. But if ideas like this get to production, they are gonna always get improved...

[@josh6pack]

Was watching some other video and saw your "can you turbo a 2 stroke" on the sidebar, was intrigued, and now I've watched like 4 of your videos and I'm hooked. You've got a new subscriber. Was kind of sad to see that this video was so recent because I was hoping to find that you'd already built a prototype, but at least now I have something to look forward to.

[@MrS22222]

Seems violent. Cool!

[@TheBlibo]

do you think that a gasoline two strokes efficiency could be improved by taking a uniflow approach like the old GM Detroit diesels

[@fkingride.5500]

so basically its like a really complex sterling engine? useing the transfer of heat to not waste stroke ?

[@dirtygarageguy]

in a word, no.

[@fkingride.5500]

@@dirtygarageguy lmao i see it was a while ago did you build it yet by any chance?

[@99catsin6bags]

It's been done before in the early 30s with very large diesel engines. The difference is it had 2 crankshafts, one at each end. The conrods came out at the center of the heads.

[@dirtygarageguy]

Thats an opposed psiton engine I have a video called the OPOC engine design

[@michaelteeple8704]

Man you draw in some serious haters in the comments. Not quite as bad as the turbo 2 smoker but close. I agree with most info u put out and take in all i can. Tuners book is hard reading but it would help many of these u tube engineers.

[@markmark5269]

Not only has it been done, it has been done in different configurations to the same end goal, and over 100 years ago. As an aside, virtually every steam train's engine is this foundation as well.

[@dirtygarageguy]

Links?

[@geraldchristensen2826]

I'm interested in ultra short stroke engines at the moment. I like the idea of the rocker piston that Honda used in their GP bike, for instance. Any way, as I watched your video I'm thinking horizontally apposed, boxer style, and replace the connecting rod system with a gear and rack system, reduce the stroke, increase the rpm, and oil with a mist/total loss system. Quite brilliant design you've got there. Hope to see a test mule.

[@sciewter]

Just need to epoxy the intake ports and do a hard break in and you're golden best engine ever.

[@stevetrimble3891]

as a slow speed marine engine this is very interesting and exciting. as an engine for a road going vehicle it would be fuel inefficient like other 2 strokes... fantastic idea tho' keep pushing, i love your idea...you have that inventive spark!

[@johangerber2942]

I am not an engineer, cut common sense tells me boxer design will eliminate gravity problems, you can configure flat2 (firing 4 times every 360 degrees) and as such they can share the load on the supercharger peripheral drive unless you share the connecting part which would mean it still fires twice every 360 degrees, but that would eliminate parts but then again you could double the pairing with a 4 cylinder 8 piston-top setup firing every 90 decrees from two locations each time - what is also nice about this design is that there is no sideways piston slap inducing force which reduces wear on the rings and the piston skirt itself - hope to see a you tube video of the engine build and test :-) You considered 2-stroke diesel?

[@dirtygarageguy]

No, and don't want to really. More on this is part 2. Excellent comment though - matt

[@allanhughes7859]

Took your drawings / concept and tried it out last Sunday. I think i get out of Hospital next Wed or Thur The burns are not too bad really.Anyway it worked for a short while I think i got the fuel mix a liitle wrong. When i get out i will try again Matt and let you know..Cheers for now !!!

[@hellishgrin4604]

Ever thought of a 2 cylinder 2-stroke that cuts the ignition every 3-5 strokes to and uses the oil/air or oil/fuel/air mixture to cool the cylinder, but then delivers that non-combusted mix into the other cylinder (maybe via the exhaust or some sort of additional adjoining valve) to keep the power without (ideally) too much efficiency loss?

[@meks8086]

I have a question. I been really thinking about getting the new 2018 KTM 250 EXC TPI or the 300 version and i love the idea of a 2 stroke dirtbike with this amazing fuel injection system an all the gearing for the enduro type ridding i do and all these things that seem to make most of the negative things about 2 strokes go away... They seem like the perfect 2 stroke bikes But i just dont really know what to think about them. So i was wondering what you might think or know about them?

[@dirtygarageguy]

Here - kzbin.info/www/bejne/nGK3h6awqKaLmZo

[@meks8086]

The Workshop aye thanks there man that actually helped me quite a bit. These bikes are so new its hard to find solid answers especially a bit more detailed information about it rather then hearing or reading people saying how well the damn thing performs lol

[@planegaper]

I think they did some steam engines like this, in locomotives, where every movement of the piston was under power.. Mid you the piston is huge, and hence doesn't reciprocate all that fast making the valve gear robust and simple.. but not having to move at the crazy rates of speed..and move fuel into the combustion chamber (remember steam was already under tremendous pressure entering the valve gear), so a forced induction system based on the same tech might work.. there is a scooter design that takes advantage of this called a (uniflow) design, but I don't know if it's been perfected as of yet.. cool engine regardless.. at least you worked it out..

[@dirtygarageguy]

lol the uniflow system is a old as the hills - this is my video on that exact thing - kzbin.info/www/bejne/p6WWeWl8adJ7fsU