Variable valve system of internal combustion engine and...

Details Variable valve system of internal combustion engine and... Variable valve system of internal combustion engine and...

2005-09-06

2008-12-30

Lewis, Tisha D (Department: 3681)

Interrelated power delivery controls, including engine control

Transmission control

Control by sensed ambient condition, pattern indicia,...

C477S098000, C123S188900, C123S19800E

Reexamination Certificate

active

07470211

ABSTRACT:
A valve characteristic changing mechanism is supplied with oil discharged from an electric oil pump in addition to oil discharged from a mechanical oil pump that is driven by an operation of an internal combustion engine. Driving of the electric oil pump is controlled such that a work rate of the electric oil pump increases as a temperature of the oil supplied to the valve characteristic changing mechanism increases, or as a viscosity of the oil is reduced.

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