Quote:
Originally Posted by P-hack
I think we are all sort of waiting for a viable "not cam driven" valve train so we can have stroke by stroke control of the effective compression and expansion ratios, then you crank up the mechanical compression and detune from there, which would allow pretty much all the control you need for HCCI.
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Complete control of compression would go a long way to expanding the running capabilities of HCCI, but there are far more variables to reign in before you could apply it broadly.