Patent ID: 9097251
Filing Date: 2015-08-04
Classification: F04C

Abstract:
1. A variable-displacement lubricant pump for providing a pressurized lubricant for an internal combustion engine, the variable-displacement lubricant pump comprising: a rotor with at least one radially slidable vane, the at least one radially slidable vane being configured to rotate in a shiftable stator ring; a first plunger configured to push the shiftable stator ring into a high pumping volume direction; a pressure control system configured to control a lubricant discharge pressure of the pressurized lubricant, the pressure control system comprising a first control chamber with the first plunger being configured to move in an axial direction and a side wall; a pump outlet port connected to the first control chamber via a first pressure conduit; and a movable outlet opening disposed in the side wall of the first control chamber, the movable outlet opening being connected to a low pressure and configured to move with an axial projection; wherein the movable outlet opening and the first plunger are arranged so that the first plunger covers and closes the movable outlet opening depending on a position of the first plunger position and a position of the moveable outlet opening, the movable outlet opening is configured to be actuated by a thermostatic element based on a temperature of the pressurized lubricant, and the movable outlet opening is disposed in a movable slider as a radial through-bore.