【発明の名称】内燃機関のバルブタイミング制御装置

Japanese Patent JPH0652051

B2

PURPOSE:To prevent the excessive rotation of an engine and excessive car speed by variably controlling valve timing so as to increase an engine output in an ordinary engine operating condition while controlling it so as to reduce said engine output when said engine is in an overly operated condition. CONSTITUTION:In a control unit 24 which controls a step motor 23 which is a valve timing varying device, an engine speed N which is detected by an engine speed detecting means 61 based on the output of a crank angle sensor 25, is compared with a first set engine speed N1. When N<=N1, the valve opening phase of an intake valve is advanced with respect to an exhaust valve while, on the contrary, it is delayed when N>N1, by a valve timing determining means 64. An overly operated region judging means 63 judges that the engine is excessively rotated when the engine speed N is above a second set engine speed N2. And, based on the output of this means 63, a valve timing for providing a low output is determined by a valve timing determining means 64, to control the step motor 23.

Haruya Shirase
Takashi Mitsuhashi
Kitayama Toru

JP9664484A

July 06, 1994

May 16, 1984

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Nissan Motor Co., Ltd

F01L1/02; F01L1/34; F02B29/08; F02B37/00; F02D13/02; F02D13/08; F02D31/00; (IPC1-7): F02B29/08; F01L1/34; F02D13/02

JP5993939A

Fumio Sasashima

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