Talk:Variable valve lift

Merge of Variator (variable valve timing)

• oppose Variators don't vary the lift, they vary the timing. Lift and timing aren't the same thing. Andy Dingley (talk) 01:52, 27 June 2014 (UTC)

also see past discussion at Talk:Variator_(variable_valve_timing) Andy Dingley (talk) 01:54, 27 June 2014 (UTC)

• Comment The existing articles seem to cover similar grounds. Since that's apparently due to shortcomings in the articles, and not an actual overlap in subject matter, I'll withdraw the suggestion. RevelationDirect (talk) 03:11, 27 June 2014 (UTC)

Valvetronic greatly reducing pumping loss.

I cannot see how the Valvetronic system can greatly reduce pumping losses, as it only changes the throttle mechanism and does not eliminate it. In a conventional setup, there is a throttle mechanism in the intake manifold; in the Valetronic system, the throttle mechanism is the valve itself. The intake of air still has to be throttled. The only difference is that the Valvetronic system may achieve throttle control more effectively than a throttle mechanism in the intake manifold, which could possibly result in a slight increase in efficiency. Certainly the way the way it is written gives the impression the pumping losses due to a lack of throttling are largely eliminated. That is totally incorrect. — Preceding unsigned comment added by Cesare.castignani (talk • contribs) 14:43, 27 August 2020 (UTC)