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Old 11-09-2018, 05:25 PM   #1 (permalink)
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Toyota 2.0L M20A-KFS dynamic force engine

This engine seems pretty packed with new technology. Pretty interesting stuff IMO.

2.0-liter Dynamic Force Engine, a New 2.0-liter Direct-injection, Inline 4-cylinder Gasoline Engine

Quote:
...the newly developed 2.0-liter gasoline vehicle and hybrid vehicle engines achieve world-leading thermal efficiencies of 40 percent and 41 percent respectively...

Not too shabby! What nifty techniques did they use? Lets see:


Quote:


Very neato Toyota! Lets hear more:

Quote:
Details of new technologies

Piston with Laser Pit SkirtWorld's first
By subjecting the skirt sliding surface to mirror finishing, reduced friction is realized. On the skirt surface, narrow crosshatch grooves created by lasers improve scuff resistance.





Performance

Cylinder head (for conventional engine vehicles and HVs)
Adopting a laser clad valve seat for the intake valve seat to make the intake port compatible with strong tumble flow (fuel consumption performance) and intake flow rate (output performance).





Fuel Consumption





Common architecture of combustion



Wooo, that BSFC map looks nice!



Here is a video explaining some of the technology too.


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Old 11-12-2018, 09:26 AM   #2 (permalink)
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It's not mentioned, but I'm assuming this engine also uses an offset crank? I'd be pretty interested in a comprehensive list.

That peak BSFC RPM is pretty high, maybe attributable to friction reduction?
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Old 11-12-2018, 10:20 AM   #3 (permalink)
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I could be wrong, but I would assume most new engines are using an offset crankshaft these days.
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Old 11-12-2018, 12:04 PM   #4 (permalink)
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If I'm not mistaken, the K20C in the new Accord and Civic Type R do not have an offset, since none of the other engines in the K family have an offset. I can't find any explicit information on it.

It would not surprise me if Subaru's boxer engines did not have an offset, for balance reasons.

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