Electrically-operated throttle actuator

Details Electrically-operated throttle actuator Electrically-operated throttle actuator

1992-08-18

1993-06-01

Wolfe, Willis R.

Internal-combustion engines

Engine speed regulator

Open loop condition responsive

123399, F02D 1110

Patent

active

052150577

ABSTRACT:
There is disclosed an electrically-operated actuator in which a throttle valve is driven by a combination of the rotation of a motor and the operation of an accelerator by the operator, and besides the rotational force of the motor is not so transmitted to an accelerator pedal. This actuator is further provided with a fail-safe function. A parallelogrammic link is constituted by a link member fixedly mounted on a throttle shaft, a link member rotatably mounted on the throttle shaft and operatively connected to the accelerator pedal via a wire, a link fixedly mounted on a shaft rotatably mounted on the link member, and a link member connected to the link members by pins. The throttle shaft is coaxial with a shaft of the motor. A gear in mesh with a gear fixedly mounted on the motor shaft is fixedly mounted on the shaft, thereby forming a differential gear mechanism. Forces of springs act respectively on the throttle shaft and the link member in a direction to close the throttle valve. In order to prevent excessive opening and closing of the throttle due to the run-away of the motor, stoppers limit the angle of rotation of the motor.

REFERENCES:
patent: 4727840 (1988-03-01), Nishida et al.
patent: 4787353 (1988-11-01), Ishikawa et al.
patent: 4969437 (1990-11-01), Kolb
patent: 5040508 (1991-08-01), Watanabe
patent: 5046575 (1991-09-01), Asayama
patent: 5113822 (1992-05-01), Asayama

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