Pump assembly for producing variable volumetric flow in pressure system of automatic transmission used in motor car, has control unit through which position of control slide is actively changed based on control signal

摘要

The assembly has a displacement pump (1) that is positioned adjacent to lifting ring according to a pressure control in a pressure chamber (12,13). The pressure chamber is connected to power port. A control slide (20) is provided with control chambers (21). The control chamber is connected to load with outlet (10) of displacement pump and with inlet (11) to define flow rates of displacement pump. A control device (2) is provided with control unit through which a position of control slide is actively changed based on a control signal.