Comments by "" (@Wingnut353) on "Repairman22" channel.

  1.  @DigBipper188  this is partly true... but by the silver series of detroit engines it was almost a non issue, and we've gone 30 years past that now, its pretty much a solved problem and Achates power's engines can high 2027 emissions standards while essentially being very similar mechanically to a detroit diesel (other than it being opposed piston... the ports are still there and its still direct injection) Alot of the reason detroits leaked oil and burned it was poor tolerances... which is also why you had to run heavy oils. they used cork gaskets for goodnesss sake!
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  2.  @actionjksn  We already have 45+% efficient gas and diesel engines developed.... just nobody is building them except for military applications, china also has 50% efficient diesels in production. Also part of the reason current diesels are inefficient is excessive after treatment instead of just cleaning up the initial burn.... it wastes a lot of power.
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  3. This is a terrible design compared to just implementing an opposed piston engine... which is drastically simpler.
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  4. True, opposed piston variation of this would solve that though... since you have much longer stroke and duration per cycle. Also they do stratified injection as well.... you inject the main fuel load, the inject a rich load near the spark plug, fire the spark plug and it creates a compression wave to ignite the rest simultaneously... that sort of thing.
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  5. or really good at failing to get engines to market....
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  6.  @Eduardo_Espinoza  like Achates's powers engines... the are diesel multifuel capable also. They demoted an f150 gettin 37mpg a in 2018... and beating 2027 emissions standards. The simplest way to do it is with 2 cranks... with the pistons pointed towards the center, but you can also do an arrangement like a commer knocker engine if you want to avoid the 2nd crank (it adds other complexity though).
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  7. Your idea? This idea is at least 100 years old...
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  8. It's still a super charger.... specifically a blower type super charger it forces a greater than ambient pulses of air pressure into the cylinders... that's literally what a supercharger is. A turbo charger is ALSO a supercharger.... that it is required for the engine to run is irrelevant.
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  9. Not as loud probably because there is less excess exhaust gasses like on ported engines... so probably would sound similar to a gas 2 stroke with knock.
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  10.  @Nordic_Mechanic a actually you can get rid of the valves entirely with intake an exhaust port pairs on an opposed piston 2 stroke... and it can apparently be made super efficient as well. See achates power and the cummins advanced combat engine. They also demoed a 2.7L 270hp f150 that got 37mpg...
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  11. Already developed... too expensive. Nobody wants to pay supercar prices for their engines.
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  12.  @m1sst4k37  It needs to scavenge N cylinders worth of air per revolution... no way around that. You can run the compressor at 4x the speed of the engine but it probably won't be reliable so they'll run it lock step with the engine most likely and disengage it once turbo boost pressure has built up at mid to high RPMs. Its possible they could design the engine so idling is infrequent so the short lifespan of a 4x speed compressor isn't an issue since it can be disengaged after turbo pressure builds. If you do that you can only sell the car as a hybrid though since a flywheel integrated starter would be required if you are shutting it down after short idle periods.
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  13. Aka it's retarded. Seriously though this engine stops short of actually being good, to get there we need a 2 stroke opposed piston engine that eliminates the complicated head.
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  14. this is a problem detroit diesels solved like 90 years ago... also you can bypass the blower essentially free wheeling it once turbo pressure is high enough when the engine is under load.
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  15. I mean detroits dont' have reliability problems... then again they are heavy suckers. They'll run even when worn slap out.
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  16. Correct... the only way to make this idea work is what Achates power already developed. It's essentially this with opposed pistons so you eliminate the head complexity. You still have the external compressor (90+ years of experience building those) and fuel rail though (off the shelf fuel rails are super reliable though). But yes with the 4 stroke style head it will probably be a reliability nightmare. Achates power's design also allows the engine to specialize the ports unlike a detroit.... so one side is intake an the other is exhaust all with a 2 stroke cycle.
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