发明名称 |
valve characteristic control apparatus of internal combustion engine and methods of controlling valve characteristics |
摘要 |
<p>A camshaft (22) provided with three-dimensional cams (27) is connected at its one end to a valve lift-varying actuator (22a). By the valve lift-varying actuator (22a) displacing the camshaft (22) in the directions of an axis of the camshaft (22), the lift characteristic of intake valves (20) set by the three-dimensional cams (27) is variably controlled to a target amount of valve lift. The valve lift characteristic related to this control is detected as a detected amount of valve lift by a reference-purposed detected portion and a cam angle sensor (126). An apparatus and a method diagnoses abnormalities in the valve lift-varying actuator (22a) by, for example, evaluating whether the amount of change in the detected amount of valve lift is at most a predetermined value and the absolute value of a difference between the detected amount of valve lift and the target amount of valve lift is greater than a predetermined value.</p> |
申请公布号 |
EP1143117(A2) |
申请公布日期 |
2001.10.10 |
申请号 |
EP20010105781 |
申请日期 |
2001.03.08 |
申请人 |
TOYOTA JIDOSHA KABUSHIKI KAISHA |
发明人 |
MIKAME, KAZUHISA |
分类号 |
F01L1/46;F01L1/34;F01L1/344;F01L13/00;F02D13/02;F02D41/00;F02D41/22;(IPC1-7):F01L13/00 |
主分类号 |
F01L1/46 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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