Engine carburetor throttle blade positioning control

Details Engine carburetor throttle blade positioning control Engine carburetor throttle blade positioning control

F - Mech Eng,Light,Heat,Weapons

02

M

123/85, 123/98

F02M 19/12 (2006.01) F02D 31/00 (2006.01) F02M 3/07 (2006.01) F02M 25/06 (2006.01) F02M 25/07 (2006.01)

Patent

CA 1138732

- 14 - ABSTRACT The throttle valve of an automotive engine carburetor is positioned at times by a vacuum servo means to maintain or establish a predetermined engine idle speed rpm. The engine exhaust gas recirculation (EGR) valve is also controlled by a vacuum servo means to schedule EGR flow. The two servo means time share the vacuum by means of a computer controlled type electronic control so that when the throttle valve is in closed throttle idle speed position, the EGR servo means is not controlled, and when the throttle valve is in an off-idle setting, the EGR servo means is operative and the throttle valve servo means not.

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