Electrohydraulic power steering device for a vehicle

An electrohydraulic power steering device for a vehicle, comprising:

• a bidirectional hydraulic pump which is configured to, in a first direction of rotation, pump a hydraulic oil to a first pump outlet of the hydraulic pump and, in a second direction of rotation, pump a hydraulic oil to a second pump outlet of the hydraulic pump;
• a drive which is coupled to the hydraulic pump and which is configured to drive the hydraulic pump selectively in the first direction of rotation or the second direction of rotation;
• a first working line which is designed to fluidically connect the first pump outlet to a first working chamber, wherein the first working chamber is suitable for moving a piston, which is couplable to a steering rod of a steering arrangement, in a first direction;
• a second working line which is designed to fluidically connect the second pump outlet to a second working chamber, wherein the second working chamber is suitable for moving the piston, which is couplable to the steering rod of the steering arrangement, in a second direction that is opposite to the first direction;
• and
• a heat exchanger, which is configured to transfer heat generated during operation of the drive, to at least one of the working lines in order to heat the hydraulic oil flowing through the working line;
• wherein the first working chamber and the second working chamber are fluidically connected or connectable to one another via a switchable valve;
• and,
• wherein the valve is arranged in a circuit comprising the first and second working lines, the first and second working chambers, and the valve to enable heating throughout the entire circuit using only the heat exchanger.