Throttle valve controlling apparatus including relative position

Details Throttle valve controlling apparatus including relative position Throttle valve controlling apparatus including relative position

1988-08-26

1989-10-10

Nelli, Raymond A.

Internal-combustion engines

Engine speed regulator

Having plural throttle valve structure

F02M 1104

Patent

active

048724351

ABSTRACT:
In a throttle valve controlling apparatus, there is provided a pair of first and second throttle valves. The first throttle valve is rotated by an electrically controlled actuator, whereas the second throttle valve is rotated by an accelerator pedal. A relative position limiting device is interposed between the electrically controlled actuator and a calculation/controlling unit. This calculation/controlling unit enables the electrically controlled actuator to be controlled by transferring a rotation command signal. When the calculation/controlling unit is brought into malfunction, the relative position limiting device interrupts supply of the rotation command signal from the calculation/controlling unit to the electrically controlled actuator, so that the first throttle valve is forcibly returned to its fully close position by means of a return spring.

REFERENCES:
patent: 4445474 (1984-05-01), Nakau et al.
patent: 4688533 (1987-07-01), Olobe
patent: 4757796 (1988-07-01), Jimenaz
patent: 4805572 (1989-02-01), Fujita et al.

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