Hydrostatic auxiliary drive system
A dual path hydrostatic drive system having an electronic auxiliary drive auxiliary drive controller controlling the hydraulic output of left and right variable displacement pumps in response to the speed of the main drive wheels and a speed ratio signal from a speed ratio input control. In addition, the auxiliary drive auxiliary drive controller controls the outputs of the pumps within three basic boundary conditions; a hydraulic pressure boundary condition, a motor speed boundary condition and a power boundary condition. A clutch mode activation switch has two positions for signaling the auxiliary drive auxiliary drive controller to operate in a first mode in which the auxiliary drive system is shut down upon activation of the main clutch or a second mode where the auxiliary drive controller attempts to mirror the operation of the main drive wheels.
Deere & Company
F F B F
F16H F16H B60K F16H
inventional inventional additional inventional
William Daniel Judson P. David William Alfred Sigmund Glenn Owen William Michael Gladys L.
Robinson Clark Stubben Smemo Scheer Walter Evans