Denso Corporation

Masahiko Sugaya

Nobukazu Kuribayashi

Tokuhisa Takeuchi

Akira Yamaguchi

Takashi Takata

Shinji Wakao

Daizou Koumura

Shigeo Shiba

An actuator control device includes an electrical control unit for detecting the present positions of output shafts of servo motors, and communicating with control circuits for driving the output shafts of the servo motors to target stop positions on the basis of the present positions thus detected. When it is judged that a present position of one of the output shafts thus receives is abnormal, the electrical control unit corrects the present position and transmits the corrected present position to the appropriate control circuit.

Actuator control unit

An electrical connector has a housing, a circuit board, harness terminals, and contact terminals. The housing has a hole and a lid. The circuit board is detachably disposed in the hole. If the circuit board is broken down, the lid is opened and the circuit board is removed from the hole. A new circuit board is then disposed on the terminals in the hole. The lid is closed so that the terminals are elastically deformed and the electrodes of the circuit board are electrically connected to the terminals.

Electrical connector

A wiring harness for connecting electrically between in-vehicle units includes a pitch ribbon cable having a plurality of bridge portions and a connector having a boss and a press-contact portion. Each bridge portion includes first, second and third notches. The third notch is engaged to another boss of the in-vehicle unit in case of assembling the pitch ribbon cable to the in-vehicle unit so that layout of the wiring harness becomes definite. The second notch is engaged to the boss of the connector in case of attaching the pitch ribbon cable to the connector. The first notch is engaged to the press-contact portion of the connector with using the second notch as a positioning reference so that positioning of the pitch ribbon cable becomes definite.

Wiring harness

In determining a starting point of a motor of an electric actuator during its initialization procedure, when a rotation angle sensor detects pulse signals in a certain initialization pattern, power supply to the motor is stopped by the control of a motor drive circuit. This electrical control of motor rotation enables the initialization procedure of the actuator to be carried out without using mechanical restriction means for locking purposes, and the influence of variations in the deflection amount of any stoppers is eliminated. The precision in determining the starting point in the initialization procedure is thus improved.

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Anjo, Japan

Masahiko Sugaya