Controllable coolant pump having a fluidic actuator

Abstract

A controllable coolant pump for a cooling circuit of an internal combustion engine having a pump housing with an inner bore, a shaft drivable via a pulley mounted rotatably via a first bearing and a second bearing, wherein the shaft is configured at least partially as a hollow shaft and has a longitudinal axis, wherein a rotor is fastened to one end of the shaft, which rotor has an idler pulley and vanes which project into a suction chamber to suck water via a suction connector of the pump housing into the suction chamber to an annular channel of the pump housing, wherein the idler pulley can be displaced axially via a push rod connected to an actuator. The fluidic actuator has a first pressure chamber and a second pressure chamber. The weight and the installation space requirement of the controllable coolant pump can be reduced.

Description

[0001]The present invention relates to a controllable coolant pump, in particular for an internal combustion engine, having a fluidic actuator.BACKGROUND[0002]Internal combustion engines are usually water-cooled engines, in which, with the aid of a coolant pump in a closed circuit, cooling water is pumped through cooling channels in the area of the cylinders for cooling the internal combustion engine and subsequently conveyed to an air / water cooler, where the heated water is cooled again with the aid of the air stream. The coolant pump needed for circulating the water is usually connected to a drive pulley of the crankshaft of the internal combustion engine via a driving means. The direct coupling between the coolant pump and the crankshaft establishes a dependency of the rotational speed of the pump on the rotational speed of the internal combustion engine, so that, in modern internal combustion engines, controllable coolant pumps are frequently used whose delivered volume flow may...

AI Technical Summary

Benefits of technology

The present invention provides a controllable coolant pump for an internal combustion engine that has reduced weight and space requirements. The pump has a reduced weight and takes up less installation space than traditional coolant pumps. The pressure of the coolant pump can be controlled, and the pump is designed to be continuously controlled. The pump uses a fluidic actuator to control the coolant pump, which allows for a continuous control of the pump. The pump has a simple construction, with a fluid-permeable first and second pressure chamber for supplying and discharging fluid. The pump is actuated by a spring element, which ensures a return of the push rod to its original position in case of failure. The use of the controllable coolant pump reduces the weight and space requirements of the engine.

Problems solved by technology

The disadvantage of a configuration of this type is that controlling the coolant flow with the aid of the piston and the final control unit makes for a heavy weight and requires a great deal of installation space.

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