Sentences with phrase «optimum volumetric efficiency»

In order to achieve the optimum volumetric efficiency in the lower portion of the engine's operating range, rocker arms are programmed to follow cam lobes that provide low lift and reduced duration (shorter time open with less valve lift).

Not exact matches

The 3.6 - liter V - 6 engine design features DOHC and high - flow intake and exhaust ports, that in combination with variable - valve timing via dual independent cam phasing, allow optimum volumetric and combustion efficiency over the full speed and load range.

Unfortunately, the frequency, magnitude and timing of these pulses varies with speed, so the volumetric efficiency of an engine with fixed valve timing will only be optimum at one speed.

Dual - overhead cam (DOHC) cylinder heads with high - flow intake and exhaust ports, in combination with variable - valve timing (VVT), allow optimum volumetric and combustion efficiency over the full speed and load range.