Variable valve timing controller for internal combustion engine

Details Variable valve timing controller for internal combustion engine Variable valve timing controller for internal combustion engine

2007-02-20

2007-02-20

Kwon, John T. (Department: 3747)

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

C123S321000, C123S347000

Reexamination Certificate

active

11248251

ABSTRACT:
An ECU calculates an engine speed for calculating a camshaft phase based on a time period Tθ in which a crankshaft rotates a sampling angle θ. The camshaft phase is derived from a time difference between output timing of a cam angle signal and output timing of a crank angle signal based on the engine speed. According as the engine speed is lower, the sampling angle θ becomes small, so that the engine speed and the camshaft phase are precisely calculated.

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