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Old 07-28-2017, 09:10 PM   #1 (permalink)
ellenor2000
i should weld
 
Join Date: Apr 2017
Location: A hilly area in Western Canada
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Thumbs down My first and hopefully last corral entry, and it's hypothetical

Wouldn't running variable 20something:1 (basically, maximum lean running) to 11:1 (rich max) AFM with a high compression ratio, electronic spark control, diesel-type exhaust scrubbing and multiport direct injection on the late side of the compression stroke (similar to diesel) have reasonable efficiency? I mean, it's running lean, so it is burning more of the fuel and it's probably producing way too much NOx... but would it burn less fuel per horsepower at part-throttle, where the throttle would be more open for the same power level?

I realise Honda did a less extreme version of this, and probably Chrysler too.

But this seems pretty #Unicorn to me.

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2007 Kia Spectra LX, front wheel drive (as all of them), 2 L, 5 speed manual. It needs a 6th gear Revs too high on the highway, but lugs too hard at 50km/h.
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