Idle control valve for use with a throttle assembly of an intern

Details Idle control valve for use with a throttle assembly of an intern Idle control valve for use with a throttle assembly of an intern

1987-09-11

1989-01-10

Nelli, Raymond A.

Internal-combustion engines

Engine speed regulator

Idle speed control

123 56R, 251248, F02M 300

Patent

active

047965800

ABSTRACT:
Idle control valve for use with a throttle assembly of an internal combustion engine includes a valve body, and a valve spool mounted within the valve body so as to be rotatable in opposite directions about an axis common to the valve spool and body. The valve spool includes a valve port defining an effective area which establishes the amount of air flow through the valve body between the air inlet and outlet thereof. Upon rotation of the valve spool by suitable drive structure (as by a DC motor receiving command signals from an engine control unit), the effective area of the valve port will be altered thereby responsively controllably altering the amount of air flowing through the valve body between its inlet and outlet. A clutch assembly precludes the transmission of torque to the valve spool above a predetermined threshold level (as by the valve spool reaching maximum or minimum positions) so that relative slippage occurs between the valve spool and the structure driving same.

REFERENCES:
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patent: 4519369 (1985-05-01), Kitamura
patent: 4538570 (1985-09-01), Lunt
patent: 4539955 (1985-09-01), Wilson

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