| 摘要 |
The invention relates to a device for the switchable coupling of two shaft parts with a predetermined angle of rotation relationship, in particular of two mutually detachable crankshaft parts of a multi-cylinder reciprocating internal combustion engine of motor vehicles. The coupling device comprises a first coupling which brings about an initial coupling, with approximate speed equalisation, and a second coupling which effects the direct through-coupling of the two shaft parts by means of positive engagement. In order to achieve as quick and as reliable as possible a connection of the two crankshaft parts at a predetermined angle of rotation relationship, the first coupling should be formed by a hydraulic gear pump (5) functioning against a pressure-control valve (6). <IMAGE>
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