Quote:
Originally Posted by t vago
Now, how is DCD different from lean-burn, you ask?
DCD cuts fuel entirely out of one cylinder, for a given firing cycle of an engine. So you have 3 (or more) cylinders, all burning a set amount of fuel, producing a set amount of work, and consuming a set amount of pumping work. You also have one non-firing cylinder, not producing any work whatsoever, but also consuming a set amount of pumping work.
The firing cylinders aren't leaned out at all. DCD does not do that. It only cuts out fuel from one cylinder in a given firing cycle. This is exactly what heihetech described for his wonder device.
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This is all correct.
Now consider that when we go from 4 firing cylinders to 3, changing nothing else, the 3 are not consuming enough fuel to produce as much work as 4. Correct?