| 摘要 |
<p>A dual control system for a vehicle having a first station mounted on a chassis (26) for controlling steering of the vehicle with a steering wheel (68), and a second station, mounted on an upperstructure (12), which is rotatably supported from the chassis (26), for steering the vehicle with a steering device (42) wherein control inputs for steering the vehicle from the first station and the second station are provided to a common steering gear box (50), characterized in that it comprises an upperstructure hydraulic reservoir (22) mounted on the upperstructure (12), an upperstructure power steering pump (20) having an input connected to said upperreservoir (22) and an output for providing pressurized hydraulic fluid, a chassis hydraulic reservoir (72) supported on said chassis (26), a chassis power steering pump (70) having an input connected to said chassis reservoir (72) and an output for providing pressurized hydraulic fluid to the common steering gear box (50), a hydraulic connection (74) between said upperstructure reservoir (22) and said chassis reservoir (72) to provide free communication therebetween, a flow divider (24) disposed in the output of said upperstructure power steering pump (20), having a first output connection (29) for supplying pressurized hydraulic fluid to the common steering gear box (50) and a second pressurized hydraulic fluid output and steering valve means (23) connected to said second output of said flow divider (24) to provide steering control to the common steering gear box (50) from the second station. </p> |
