Throttle valve control device for internal combustion engines
In a throttle valve control device for controlling a position of an engine throttle valve secured to a rotary shaft, which includes a control unit operative to produce a first electrical signal in accordance with a movement of an engine accelerator and an electro-mechanical force transducer operative to impart a first rotational torque to the rotary shaft and thereby to the throttle valve, the first rotational torque corresponding to the first electrical signal, the improvement is described comprising: a throttle valve returning means operative to produce a second rotational torque for biasing the throttle valve to a fully closed position irrespective of the movement of the engine accelerator and means responsive to the second electrical signal to transmit the second rotational torque to the rotary shaft irrespective of the movement of the engine accelerator.
- Assignee:
- Hitachi, Ltd., Tokyo
- Patent Number(s):
- US 4747380
- OSTI ID:
- 6911504
- Resource Relation:
- Patent File Date: Filed date 23 Jul 1986
- Country of Publication:
- United States
- Language:
- English
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