FAILURE DETECTION DEVICE FOR ELECTRONICALLY CONTROLLED TYPE AUTOMATIC TRANSMISSION

Japanese Patent JP2004225750

A

To provide a failure detection device for an electronically controlled type automatic transmission, capable of accurately judging inappropriate gear ratios and sensor failures, and identifying these failures.

This device is equipped with an input rotational frequency detecting means (20) for detecting an input rotational frequency (Na) of the automatic transmission (3), an output rotational frequency detecting means (22) for detecting an output rotational frequency (Nc) of the automatic transmission (3), an intermediate rotational frequency detecting means (21) for detecting an intermediate rotational frequency (Nb) of the automatic transmission (3), and a failure detecting means for detecting individually failures of the input rotational frequency detecting means (20), the output rotational frequency detecting means (22) and the intermediate rotational frequency detecting means (21) and inappropriate gear ratios of the automatic transmission (3), on the basis of each output of the input rotational frequency detecting means (20), the output rotational frequency detecting means (22) and the intermediate rotational frequency detecting means (21).

JP2013032825	POWER TRANSMISSION CONTROLLER OF VEHICLE
JP2004068989	FAILURE DETECTING DEVICE FOR AUTOMATIC TRANSMISSION FOR VEHICLE

KAWAGUCHI TAKATERU
TORIMOTO YOSHIFUMI
TSUCHIYA HIROSHI

JP2003011840A

August 12, 2004

January 21, 2003

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JATCO LTD

F16H61/12; (IPC1-7): F16H61/12

JPH09506959A	1997-07-08
JPH11280882A	1999-10-15
JPH01139152U	1989-09-22
JPH04151068A	1992-05-25
JPH11180182A	1999-07-06

Hidemi Kashima

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