Electronic throttle actuator

Details Electronic throttle actuator Electronic throttle actuator

F - Mech Eng,Light,Heat,Weapons

02

D

123/3

F02D 41/00 (2006.01) F02D 11/10 (2006.01)

Patent

CA 1328061

ELECTRONIC THROTTLE ACTUATOR ABSTRACT OF DISCLOSURE An electronic throttle actuator (10) is directly connected without an intervening gear train to a stepper motor (12) for rotating the throttle valve (16) from a first position, closed or substantially closed, to a second position which is wide open and any angular position therebetween. The movement of the throttle valve is under control of electronic control means (70) which can locate the throttle valve at any one of a plurality of positions between the fist and the second positions. The coupling (24) between the motor and the shaft of the throttle valve provides for redundant means to close the throttle valve and connected to the shaft are a pair of redundant torsion springs (30,32) for biasing the throttle valve in said first position. A second coupling (38) directly connects the shaft of the throttle valve to a throttle position sensor (22). A pair of cavities (36,34) are formed in the throttle body housing for enclosing both the coupling from the shaft to the motor and to the throttle position sensor and the redundant torsion springs. Vent passages (40) communicate the cavities to the throttle bore.

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