| 摘要 |
PCT No. PCT/DE88/00667 Sec. 371 Date Mar. 26, 1990 Sec. 102(e) Date Mar. 26, 1990 PCT Filed Oct. 26, 1988 PCT Pub. No. WO89/04419 PCT Pub. Date May 18, 1989.A device for engine cooling includes at least one mechanical coolant pump driven by the engine to be cooled and at least one electric coolant pump controlled by an electronic switching device being provided in at least one cooling circuit of an engine to be cooled. The conveying capacity of the electric pump is set as a function of operating variables of the engine to be cooled and of further variables, while the mechanical pump is designed for a basic conveying capacity. In the coolant circuit a heat exchanger which is operated as a radiator, the cooling capacity of which can be altered with the aid of a radiator blind and of a fan, is arranged in a first coolant path. An additional heat exchanger, the waste heat of which is used for heating purposes or for further engine cooling, is arranged in an additional coolant path or in a separate coolant circuit.
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