Controllable coolant pump

Abstract

The invention relates to a controllable coolant pump for a cooling circuit of an internal combustion engine, having a pump housing (1), in which a hollow shaft (2) which can be driven through a belt pulley (5) is supported. An impeller (4) is fastened to an end of said hollow shaft, comprises blades (6) protruding into a suction chamber (7), and is rigidly connected to a cover disk (9) through axial webs (8), wherein water can be sucked into the suction chamber (7) through a suction connecting piece (10) of the pump housing (1) and transported into a ring channel (11) of the pump housing (1) over the blades (6) by the rotation of the impeller (4) together with the cover disk (9), wherein furthermore a guide disk (12) having a contour corresponding to the impeller (4) is arranged between the impeller (4) and cover disk (9), is guided over the axial webs (8), and can be moved axially through an actuating unit by means of a piston (14) placed within the hollow shaft (2).

Description

technical field [0001] The invention relates to an adjustable coolant pump for a cooling circuit of an internal combustion engine, the adjustable coolant pump having a pump housing in which a hollow shaft drivable by means of a belt pulley is supported, at one end of the hollow shaft An impeller is fixed on the top, the impeller has blades protruding into the suction chamber, and is fixedly connected to the cover plate through the axial connecting piece, wherein, through the common rotation of the impeller and the cover plate, water can be sucked through the pump casing The pipe connection is sucked into the suction chamber and can be conveyed by the vanes into the annular channel of the pump casing. Background technique [0002] In the field of internal combustion engines, water cooling of the engines has been widely used. Here, cooling water is pumped in a closed circuit by means of a coolant pump through cooling ducts in the area of ​​the cylinders for cooling the intern...

AI Technical Summary

Problems solved by technology

In contrast, the problem arises during a cold start of the internal combustion engine that the coolant is already circulating through the cooling ducts, which prevents the heating of the combustion chamber and thus delays the attainment of the optimum operating temperature

[0006] Disadvantageously with such an arrangement is that the adjustment of the coolant flow by means of the displacement element has a complex mechanism and thus a complex construction.

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