Off-road vehicle having wheel slip control

Details Off-road vehicle having wheel slip control Off-road vehicle having wheel slip control

1981-08-31

1983-09-06

Mitchell, David M.

Motor vehicles

With means for detecting wheel slip during vehicle...

60426, 180 20, 180242, 180307, 180308, B60K 3100

Patent

active

044023774

ABSTRACT:
An off-the-road vehicle has wheel sets of the same or different forms such as rolls or differentially driven wheels with a hydraulic motor and gear reduction drive for each wheel set. An engine driven variable displacement fluid pump is fed by return lines from the motors, and a fluid control system is provided including a valve associated with each motor and a restricted delivery line from each valve to its associated motor, an unrestricted delivery line from each valve to the other motor, and a restricted line connecting the two motors. Each valve is biased toward a first position by a spring and fluid pressure at the associated motor and has ports connecting the pump and restricted line to the associated motor in a first position, each valve being movable toward a second position by pump output pressure and having parts connecting the pump and the other motor through the unrestricted lines in the second position. In the event of a loss of traction by the wheel set driven by the associated motor, each of the lines to and connecting the motors has a restrictor which has been preselected to provide the recovery of traction of each wheel set as required by the slipping characteristics of the respective wheel sets.

REFERENCES:
patent: 3555968 (1971-01-01), Praddaude
patent: 3889759 (1975-06-01), Larson
patent: 4236595 (1980-12-01), Beck et al.
patent: 4310261 (1982-01-01), Opderbeck

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