Van or roller-cell displacement pump, with second bypass channel between throttle channel and outlet channel

摘要

The displacement pump includes a bypass channel (18) connecting the pressure cavity (10A) to the spring cavity (15) of the regulating piston (17). There is also a second bypass channel between the throttle channel (12) and the outlet channel (14), taking the supply flow from the pump initially away from the outlet channel and only taking it there after a throttle sector (22).