Pumping Losses

Some articles on pumping losses, losses:

Continuous Variable Valve Timing - Traditional Internal Combustion Engines
... “These pumping losses depend on the opening and closing of the throttle valve ... The losses are high when the throttle valve tends to close and are low at wide open throttle ... Thus the pumping losses are inversely proportional with engine load” ...
Continuous Variable Valve Timing - Early Intake Valve Closing
... Another way to decrease the pumping losses associated with low engine speed, high vacuum conditions is by closing the intake valve earlier than normal ... required to fill the cylinder is relatively high, so Early intake valve closing greatly reduces pumping losses ... Studies have shown early intake valve closing to reduce pumping losses by 40%, as well as to increase fuel economy by 7% ...

Famous quotes containing the words losses and/or pumping:

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    —Henri-Frédéric Amiel (1821–1881)