초록 ▼

A motor vehicle throttle valve positioner consisting of an elongated screw means moving the throttle valve and providing two ranges of movement, one being an engine idle speed mode of operation to maintain the engine at the correct idling speed level as determined by a microprocessor or similar elec

A motor vehicle throttle valve positioner consisting of an elongated screw means moving the throttle valve and providing two ranges of movement, one being an engine idle speed mode of operation to maintain the engine at the correct idling speed level as determined by a microprocessor or similar electronic control, the other being a speed control mode of operation wherein a chosen engine off-idle speed level is maintained, and a failsafe operation returning the throttle valve to the idle speed range in the event of electrical failure or termination of the speed control mode of operation.

대표청구항 ▼

A motor vehicle throttle valve actuator comprising a longitudinally movable actuator having a first range of movement for actuating a vehicle throttle valve in a speed control mode and having a second range of movement for actuating the vehicle throttle valve in an engine idle speed control mode; a

A motor vehicle throttle valve actuator comprising a longitudinally movable actuator having a first range of movement for actuating a vehicle throttle valve in a speed control mode and having a second range of movement for actuating the vehicle throttle valve in an engine idle speed control mode; a drive means coupled to said actuator for effecting the longitudinal movement of said actuator in said ranges; clutching means engageable with said actuator for rendering the actuator operable in said ranges; the actuator comprising an elongated screw means coupled to the drive means; the clutching means being engageable with said screw means to hold the screw means against rotation while permitting a transitory longitudinal movement of the screw means between minimum and maximum throttle valve opening positions in response to drive thereof by the drive means, and spring means biasing the screw means in a throttle valve closing direction toward the second range of movement; the said clutching means including a stepped diameter splined means having first and second portions of differing diameters fixed to the screw means engagable alternately by the holding means to define the ranges of movements of the screw means; the longitudinal extent of the smaller diameter first portion of the splined means defining lower and upper limits of the speed control range of movement of the screw means and throttle valve, the longitudinal extent of the larger diameter portion of the splined means defining the upper and lower limits of the idle speed control range of movement of the screw means and throttle valve, the displacement of the holding means from the first portion spline permitting a free wheeling longitudinal movement in an axial throttle valve closing return movement of the screw means under the bias of the spring means until the holding means engages the splines of the second portion to again hold the screw means against rotation in the idle speed control range.