Device for correcting deviations from rectilinear movement of tr

Motor vehicles – Steering by driving – Independently operable drive motors

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60426, B62D 1104

Patent

active

045316015

ABSTRACT:
A hydraulic transmission system for tracked vehicles of the type comprising two separate hydrostatic transmissions for driving the right and the left tracks of the vehicle, each including a variable-displacement hydraulic pump provided with a hydraulically operated control for varying the pump displacement. There is provided a pressure regulating device interposed in the connection between the speed control device and the hydraulically operated control for the pumps of the two hydrostatic transmissions, which is arranged to increase and reduce the pressure supplied to the hydraulically operated control of one of the pumps so as to maintain the speeds of the two tracks equal. Preferably, the system further includes a sensor arranged to detect differences in speed of the two vehicle tracks and an actuator arranged to control the pressure regulating device in dependence on the signal received from the sensor.

REFERENCES:
patent: 3812925 (1974-05-01), Lauck et al.
patent: 3862668 (1975-01-01), Ward
patent: 4023637 (1977-05-01), Jackovich

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