Method of controlling electronically controlled valves to preven

Details Method of controlling electronically controlled valves to preven Method of controlling electronically controlled valves to preven

1998-09-03

2000-07-25

Lo, Weilun

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9012, 123198D, F01L 100

Patent

active

060924950

ABSTRACT:
The method includes the steps of sensing position of the crankshaft during a number of engine cycles and generating a frequency signal in response thereto and sensing position of the crankshaft during a number of engine cycles and generating a crankshaft frequency signal in response thereto and calculating a crankshaft speed and a crankshaft acceleration based on the frequency signal. The method further includes the step of and calculating a future piston position based on the crankshaft speed and the crankshaft acceleration. The method still further includes the steps of calculating a future engine valve position and comparing the future piston position to the future engine valve position to determine if the future engine valve position interferes with the future piston position. The method yet further includes the step of locating the engine valve in the closed position in response to determining that the future engine valve position interferes with the future piston position. An engine assembly is also disclosed.

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