Controllable coolant pump

摘要

A controllable coolant pump driven by a belt pulley for internal combustion engines is equipped with a valve slide. A seal is disposed on the outer edge of the wall plate between the plate and the outer cylinder of the valve slide. At least one additional flow outlet opening is disposed on the pump housing, the outlet volume stream of which openings can be additionally controlled, aside from the controllable volume stream that exits from the flow exit opening. The flow outlet opening from which the controllable outlet volume stream exits is connected with an outflow opening disposed near the rear wall of the valve slide, in the pump chamber rear wall, via an outflow channel. The outflow opening is enclosed by a ring seal disposed in the pump chamber rear wall, which enters into operative engagement with the valve slide in its rear end position.

主权项

1. A controllable coolant pump comprising:
a one-part or multi-part pump housing, a flow entry region, a flow exit opening for discharge of a controllable conveyed volume stream, a pump bearing connected to the pump housing, a pump shaft in the pump bearing having a free, flow-side end, and extending in a longitudinal pump shaft direction, an impeller wheel disposed at the free, flow-side end of the pump shaft so as to rotate with the pump shaft, the impeller wheel having an outflow region, a pump chamber rear wall disposed in the pump housing between the impeller wheel and the pump bearing, a wall plate fixed in place on the pump housing between the impeller wheel and the pump chamber rear wall and having an outer edge, one or more working cylinder(s) disposed in the pump housing, one or more working piston(s) disposed in the one or more working cylinder(s) to be activated by control pressure to move in the longitudinal pump shaft direction, a valve slide having a valve slide rear wall and an outer cylinder, the valve side being connected to the one or more working piston(s) and having a rear end position, the outer cylinder variably covering the outflow region of the impeller wheel as a function of the control pressure, a reset spring disposed between the wall plate and the one or more working piston(s) or between the wall plate and the valve slide, a seal disposed on the outer edge of the wall plate between the outer edge and the outer cylinder of the valve slide, one or more additional flow outlet openings disposed on the pump housing and having an outlet volume able to be controlled, an outflow opening in the pump chamber rear wall and in a region of the valve slide rear wall, an outflow channel connecting the outflow opening with the one or more additional flow outlet opening(s), and a ring seal enclosing wherein the outflow opening, the ring seal being disposed in the pump chamber rear wall and entering into operative engagement with the valve slide in the rear end position of the valve slide.