Honda Giken Kogyo Kabushiki Kaisha

Kenji Torii

Hidetaka Ozawa

Masaki Ueyama

Mitsuhito Yamazaki

A fault diagnosis method and apparatus for a control system that includes a plurality of actuators and a plurality of sensors for controlling the operation of the actuators in accordance with the output signals of the sensors, wherein even in the case where a fault occurs in any of the actuators or any of the sensors constituting the nucleus of the system, the faulty point can be easily and inexpensively identified. In the fault diagnosis, the transmission characteristics between the individual actuators and the individual sensors are measured. On the basis of the measurements, a fault is decided on for all the transmission paths between the individual actuators and the individual sensors, thereby estimating a faulty point from the pattern of the fault decision of the transmission paths.

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Saitama, Japan

Kenji Torii