Valve timing control apparatus for an internal combustion engine

1. Field of the Invention An actuator for changing a relative position of at least an intake or exhaust camshaft, and a crank shaft; a cylinder identifying unit for performing cylinder identification in accordance with results detected by a crank angle sensor and a cam angle sensor; a valve timing d...

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Bibliographic Details
Main Authors Takahashi, Tatsuhiko, Yonezawa, Shiro, Hori, Yasuyoshi, Hagari, Hideki, Furuta, Akira
Format Patent
LanguageEnglish
Published 13.07.2004
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Summary:1. Field of the Invention An actuator for changing a relative position of at least an intake or exhaust camshaft, and a crank shaft; a cylinder identifying unit for performing cylinder identification in accordance with results detected by a crank angle sensor and a cam angle sensor; a valve timing detecting unit for detecting valve timing in accordance with the results detected by the crank angle sensor and the cam angle sensor; and an OCV for controlling the actuator based on a value detected by the valve timing detecting unit are provided. Control is performed at a neutral point by a valve timing controlling unit when the cylinder identification by the cylinder identifying unit is in an indefinite state.