| 摘要 |
The invention refers to a variable-displacement lubricant pump (10) for providing pressurized lubricant for an internal combustion engine (70), comprising a rotor (14) with radially slidable vanes (15) rotating in a shiftable stator ring (13) whereby the stator ring (13) being pushed by a first plunger (21) pushing the stator ring (13) into high pumping volume direction. A pressure control system for controlling the lubricant discharge pressure of the pressurized lubricant is provided the control system comprising a first control chamber (22) wherein the first plunger (21) is provided being axially movable and a first pressure conduit (28a) connecting a pump outlet port (25) with the first control chamber (22). A movable outlet opening (42) in a side wall (52) of the first control chamber (22) is provided the outlet opening (42) being movable with an axial projection and being connected to a low pressure. The movable outlet opening (42) and the first plunger (21) are arranged so that the first plunger (21) covers and thereby closes the movable outlet opening (42) depending on the first plunger position and the outlet opening position, and the movable outlet opening (42) being actuated by a thermostatic element (54) affected by the temperature of the lubricant. |
