发明名称 |
Apparatus and method for diagnosing variable valve timing apparatus |
摘要 |
In a variable valve timing apparatus for variably controlling the valve timing by changing a rotation phase of a camshaft with respect to a crankshaft, an abnormality diagnosis of the apparatus is performed on a condition that a change amount per unit time in a control target value of the rotation phase has been kept equal to or less than a predetermined limit value for a predetermined period or more.
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申请公布号 |
US6615778(B2) |
申请公布日期 |
2003.09.09 |
申请号 |
US20010989380 |
申请日期 |
2001.11.21 |
申请人 |
UNISIA JECS CORPORATION |
发明人 |
IWAKI HARUHIRO;HOSOYA HAJIME |
分类号 |
F01L1/34;F01L1/344;F01L1/46;F01L13/00;F02D13/02;F02D41/22;F02D45/00;(IPC1-7):F01L1/34 |
主分类号 |
F01L1/34 |
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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