It’s curious how they say this tech is mostly for emissions when it has rather more of a broader effect in Automation.
Is it common that VVL would only be used on the exhaust valves?
pretty sure he explained in in the video VVL on the exhaust side only because it was designed to be turbocharged
like ie, iirc. Honda VTEC is VVL on both cams. but the I-VTEC is only on intake cams.
Yeah I don’t really understand the reasoning for putting VVL on the intake or exhaust cams. Most carmakers seem to do it on the intake.
Having it on the intake = Bigger bang
I can’t see why they put it on the exhaust only, however.
because turbo and exhaust gas regulation, and ‘natural’ EGR system, so no need for actual EGR if you can make the exhaust stroke slightly inefficient to keep the gas in.
VVL on the exhaust cam would help keep the turbocharger pressurized across a wider range of engine speed.
My question is why did VW have to use 8 solenoids and individual cam phase sliders per cylinder when 2 solenoids and a single cam-wide slider could do the same?
The only idea I have is if that engine used a twin-scroll turbine with two pairs of two cylinders’ exhaust passages separated from each other. It could then vary lift between the two sets of cylinders for even better turbine performance… but likely at the cost of potential engine longevity. Just a guess here.
When in my toyota kicks the VVT-i in the 1zr-FAE, is amazing.