Throttle body default actuation

Details Throttle body default actuation Throttle body default actuation

1994-09-30

1996-02-20

Okonsky, David A.

Internal-combustion engines

Engine speed regulator

Open loop condition responsive

123399, 25112901, F02D 1110, F02D 4122

Patent

active

054920973

ABSTRACT:
An electronically actuated, air control valve regulates the flow of combustion air to an internal combustion engine. The valve includes an air passage having a throttle valve rotatable therein between a first, minimum air flow position and a second, maximum air flow position. Between the minimum and the maximum air flow positions is a default air flow position for operation of the engine during actuator inoperativeness. A biasing member has a first end operable to impart a force on the valve member in the direction of the default air flow position when the valve member in operable between the minimum air flow position and the default position. Likewise, the biasing member has a second end operable to impart a force on the valve member in the direction of the default air flow position when the valve member is operated in the range between the default air flow position and the maximum air flow position. As a result, a single biasing member operates to position the throttle valve at a default air flow position between the minimum and the maximum air flow positions across the entire range of positions.

REFERENCES:
patent: 4867122 (1989-09-01), Kono et al.
patent: 5018496 (1991-05-01), Buchl
patent: 5265572 (1993-11-01), Kadomukai et al.
patent: 5297521 (1994-03-01), Sasaki et al.
patent: 5301646 (1994-04-01), Doi et al.
patent: 5429090 (1995-07-01), Kotchi et al.

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