F - Mech Eng,Light,Heat,Weapons – 16 – H
Patent
F - Mech Eng,Light,Heat,Weapons
16
H
341/66
F16H 61/46 (2006.01)
Patent
CA 1152192
ELECTRONIC CONSTANT SPEED CONTROL FOR A HYDROSTATIC TRANSMISSION Abstract of the Disclosure An electronic constant speed control for a hydrostatic transmission having a variable displacement hydraulic pump with a displacement controlling member movable to various positions at either side of a neutral position and having an input shaft connectable to a prime mover and a hydraulic motor having an output shaft, an electric controller for positioning said displacement controlling member, a command potentiometer for establishing a set constant speed signal representing a desired constant speed between zero and maximum speed in either direction of rotation for said output shaft, a speed detecting device for establishing a pump input shaft speed signal, a circuit for generating a position control signal representing the required position of the displacement controlling member for the set speed which is responsive to the constant speed and pump input shaft speed signals, a speed detecting device for establishig an output shaft speed signal, a circuit for comparing the output shaft speed signal with said set constant speed signal and integrating any error therebetween and generating a speed error control signal, and a summing circuit for summing said position and speed error control signals to provide a control signal to said electric controller.
356386
Foley Daniel J.
Myers H. Allen
Reynolds Richard W.
George H. Riches And Associates
Sundstrand Corporation
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