Vehicle with a hydraulic drive system

摘要

A vehicle with a hydraulic transformer including a forward propulsion valve and a reverse propulsion valve connecting a common low-pressure rail respectively to a first motor line and a second motor line, which propulsion valves have a spring to hold the valve in a first position wherein it acts as a check valve blocking the flow to the common low-pressure rail and an actuator that can switch the propulsion valve to a second position connecting the common low-pressure rail to one of the motor lines.

主权项

1. A vehicle with a hydraulic drive system comprising:
a common high-pressure rail with a high-pressure accumulator, a common low-pressure rail with a low-pressure accumulator, an internal combustion engine driving a pump connected to the common high-pressure rail and the common low-pressure rail, at least one motor/pump unit is provided for at least one wheel, and at least one hydraulic transformer with 4-quadrant operation that connects to the common high-pressure rail and to the at least one motor/pump unit via a first motor line and a second motor line; wherein the at least one hydraulic transformer comprises a forward propulsion valve connecting the common low-pressure rail to the first motor line and a reverse propulsion valve connecting the common low-pressure rail to the second motor line, wherein each propulsion valve comprises a spring to hold the valve in a first position, wherein the valve acts as a check valve blocking the flow to the common low-pressure rail, and an actuator that can switch the propulsion valve to a second position, wherein the valve connects the common low-pressure rail to the first or second motor lines.