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    • 6. 发明专利
    • For an automatic transmission fault detection device
    • JP4529123B2
    • 2010-08-25
    • JP2004164340
    • 2004-06-02
    • 株式会社デンソー
    • 章 高木
    • F16H61/12F16H59/08F16H59/40F16H59/42F16H59/68
    • PROBLEM TO BE SOLVED: To provide a failure detecting device for an automatic transmission for detecting range detection failure from noncoincidence between a travel range indicated by a selector detecting signal corresponding to operation of a shift selector by a driver and a travel range indicated by a hydraulic pressure detecting signal for detecting hydraulic pressure applied to friction elements. SOLUTION: A manual valve 20 is displaced in response to operation of a shift lever 30, and switches oil pressure supplied to control means 11 to 15 to line pressure or oil pressure of a drain 22. A hydraulic switch 40 is turned on when the oil pressure applied to the respective friction elements is an engaging oil pressure, and it turned off in releasing oil pressure. An inhibitor switch 50 outputs the selector detecting signal corresponding to the travel range selected by the shift lever 30 from terminals S1, S2 and S3. When being noncoincident between the travel ranges respectively detected from an oil pressure detecting signal of the hydraulic switch 40 and the selector detecting signal of the inhibitor switch 50, an EU 60 detects it as the range detection failure, and turns on a warning lamp 70. COPYRIGHT: (C)2006,JPO&NCIPI