초록 ▼

The tracks of a tracked vehicle are subject to a tension control system which includes a movable idler wheel for applying force to each track, a hydraulic actuator for dynamically applying force to each track at a zero spring rate, a pilot controlled check valve for selectively locking the actuator

The tracks of a tracked vehicle are subject to a tension control system which includes a movable idler wheel for applying force to each track, a hydraulic actuator for dynamically applying force to each track at a zero spring rate, a pilot controlled check valve for selectively locking the actuator against tension relieving return movement, and a control sensitive to vehicle steering, direction of movement, acceleration and deceleration for deciding according to a preset program whether each actuator should be locked or free to move. An operator controlled switch modifies system hydraulic pressure to permit an optional low pressure operation.

대표청구항 ▼

In tracked vehicle having tracks subject to variable tension, a dynamic track tension system comprising: a source of hydraulic pressure; condition detecting means for detecting vehicle conditions for and producing control signals in accordance with the vehicle conditions; hydraulic control means inc

In tracked vehicle having tracks subject to variable tension, a dynamic track tension system comprising: a source of hydraulic pressure; condition detecting means for detecting vehicle conditions for and producing control signals in accordance with the vehicle conditions; hydraulic control means including pilot valve means selectively operable to allow bidirectional flow or unidirectional flow with respect to said source, said hydraulic control means producing a control pressure; and a pressurizable hydraulic track adjuster means for controlling the tension in each track, said pressurizable hydraulic track adjuster means coupled to the hydraulic pressure source by said hydraulic control means and having pressure therein established by said hydraulic control means in response to said control signals for conditioning said hydraulic control means to vary the pressure in said hydraulic track adjuster means for applying a variable tension to each track according to the detected vehicle conditions.