Charge pressure circuit arrangement for steering control for a vehicle

摘要

A steering system is described for a vehicle having steerable wheels. A hydraulic charge pressure circuit may be configured to provide charge pressure to one or more hydraulic components of the vehicle, and a hydraulic drive pressure circuit may be configured to provide working pressure to one or more other hydraulic components of the vehicle. Hydraulic machines may rotate front wheels in order to drive the vehicle, and a front valve assembly may control steering of the front wheels by controlling the hydraulic machines. The hydraulic machines may be driven to rotate the front wheels by the working pressure from the hydraulic drive pressure circuit, and the front valve assembly may control the front hydraulic machines to steer the agricultural vehicle by controlling flow of hydraulic fluid from the hydraulic charge pressure circuit through the front valve assembly.

主权项

1. A steering system for an agricultural vehicle having one or more steerable front wheels and one or more steerable rear wheels, the steering system comprising:
a hydraulic charge pressure circuit configured to provide charge pressure to one or more hydraulic components of the agricultural vehicle; a hydraulic drive pressure circuit configured to provide a working pressure to one or more other hydraulic components of the agricultural vehicle; at least one front hydraulic machine configured to rotate at least one of the one or more steerable front wheels in order to drive the agricultural vehicle; and a front valve assembly configured to control steering of the at least one steerable front wheel by controlling the at least one front hydraulic machine; wherein the at least one front hydraulic machine is driven to rotate the at least one steerable front wheel by the working pressure from the hydraulic drive pressure circuit; and wherein, to steer the agricultural vehicle, the front valve assembly controls the at least one front hydraulic machine by controlling flow of hydraulic fluid from the hydraulic charge pressure circuit through the front valve assembly.