Quote:
Originally Posted by johnmyster
The idea is that if you can hold the intake valve open during part of the compression stroke, you can spit out some air and operate at "part throttle" even without a throttle plate. Simply throttling at the valve through low lift or low duration doesn't rid you of pumping work losses since the piston (the pump) still sees vacuum during the intake stroke.
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Oh I get it now, so the idea is to not "throttle" the incoming air at all, thus eliminating vacuum. This would get very complicated, the injectors would have to be in on the act too, because you wouldn't want the injector to pulse while the intake valve is still open and bleeding off excess air. Not that it can't be done of course.
I have been in love with the idea of the camless valvetrain ever since I learned of the concept. The potential for maximum efficiency across the entire RPM range with absolutely no compromises, no tradeoffs of low end VS top end, power VS economy etc. It makes the camshaft seem as sophisticated as a horse and buggy.