Century Dictionary and Cyclopedia
- n. A valve for controlling the supply of a fluid (air, gas, oil, steam, or water) to an engine or machine.
“At low-to-mid load ranges, the system controls air intake at the intake-valve, immediately before it enters the combustion chamber, in contrast with conventional engine air intake via a throttle valve, leading to increased efficiency by easing airflow through the cylinder.”
“In the low - and medium-rpm ranges*3, intake-valve lift is kept low to reduce camshaft friction and improve fuel efficiency.”
“Hydrocarbon emissions are reduced in the low-to-medium range by keeping intake-valve lift low, speeding intake flow and dispersing the fuel into a fine mist, resulting in more efficient full combustion.”
“With the de-throttling of the engine, UniAir can provide early intake-valve closing or late intake-valve opening in order to maximise engine breathing relative to certain engine speed and load conditions.”
“l In the high range, greater intake-valve lift allows increased air intake to deliver greater torque outputs.”
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