Apparatus for controlling intake air flow rate in internal combu

Details Apparatus for controlling intake air flow rate in internal combu Apparatus for controlling intake air flow rate in internal combu

1988-05-06

1989-06-13

Argenbright, Tony M.

Internal-combustion engines

Engine speed regulator

Open loop condition responsive

123361, F02D 910, F02D 1110

Patent

active

048382264

ABSTRACT:
An apparatus for controlling intake air flow rate in an internal combustion engine comprises a throttle valve disposed in intake air passage for swing movement to change a flow rate of air to be supplied to combustion chambers of the engine, a stopper portion to which the throttle valve is abutted so as to stop swinging thereof in a full closed portion thereof, a spring for continually urging the throttle valve towards the full closed position, a control unit for determining a desired opening degree of the throttle valve in accordance with requirements on the engine, an actuator for generating a driving force for swinging the throttle valve to the desired opening degree in accordance with a command signal from the control unit, and geared mechanism for transmitting the driving force from the actuator to the throttle valve. The geared mechanism includes a pair of gears, each having a gear tooth portion. The gears are able to engage with each other exclusively at such gear tooth portions. The gear tooth portion so extends that both of the gear tooth portions mesh with each other between full closed position and full open position of the throttle valve, and they are pushed out of mesh with each other over full open position of the throttle valve.

REFERENCES:
patent: 4161928 (1979-07-01), Teague et al.
patent: 4283355 (1981-08-01), Herd, Jr. et al.
patent: 4492198 (1985-01-01), Okumura
patent: 4590895 (1986-05-01), Yada et al.

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