Cam follower variable ratio throttle linkage

Details Cam follower variable ratio throttle linkage Cam follower variable ratio throttle linkage

1991-10-07

1993-08-31

Herrmann, Allan D.

Machine element or mechanism

Control lever and linkage systems

Foot operated

74516, 74569, 74527, 74526, F16C 110

Patent

active

052398919

ABSTRACT:
A cam and follower mechanism for connecting a vehicle accelerator pedal to an engine throttle body throttle valve for varying rates of movement of the throttle valve, including a washer-like cam operatively connected to the vehicle accelerator pedal by a pivotal connection to a cable assembly connected to the pedal, the cam having an internal surface adapted to be engaged progressively on a point-to-point basis by a one-piece tang follower to provide an infinite number of fulcrums about which the follower and throttle lever and throttle valve are forced to rotate as the accelerator pedal is progressively moved, the follower moving as the cam is pulled in one direction to thereby change the fulcrum progressively and thereby provide initially a slow rate of opening of the throttle valve in response to a large movement of the accelerator pedal, followed by a faster rate of movement of the throttle valve as the pedal moves in essentially a constant manner, to provide more nearly a movement in proportion to the angular movement of the accelerator pedal, the longitudinal axis of the cable, the pivotal connection between the cable and cam, and each fulcrum point always being aligned, to essentially eliminate binding frictional forces on the assembly.

REFERENCES:
patent: 4476068 (1984-10-01), Griffin et al.
patent: 4779480 (1988-10-01), Stocker
patent: 4875385 (1989-10-01), Sitrin
patent: 5010782 (1991-04-01), Asano et al.

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