| 摘要 |
A vehicle cooling circuit, especially an engine cooling circuit, including a cooling medium pump and a vehicle drive engine and/or other heat-generating assembly cooled by means of the cooling medium. The circuit includes a hydrodynamic retarder with the working medium of the hydrodynamic retarder simultaneously also being the cooling medium of the cooling circuit, and the hydrodynamic retarder operating as the cooling medium pump. The secondary blade wheel is associated with a brake or a drive running counter to the drive of the primary blade wheel in such a way that it can optionally be fixed in a first operating state (braking operation) or be driven counter to the rotational direction of the primary blade wheel and, in a second operating state (pumping operation), can partially or completely be released such that it circulates at the speed of the primary blade wheel or at a specified speed difference slower than the primary blade wheel. |
| 主权项 |
1. A vehicle cooling circuit, comprising:
a cooling medium circulated by a cooling medium pump in the cooling circuit: with one of a vehicle drive engine and another heat-generating assembly cooled by the cooling medium; a hydrodynamic retarder, comprising a driven primary blade wheel and a secondary blade wheel, together forming a toroidal workspace fillable with a working medium and from which said working medium can be discharged in order to transfer torque hydrodynamically from said primary blade wheel to said secondary blade wheel, with said working medium of the hydrodynamic retarder simultaneously also being the cooling medium of the cooling circuit, and the hydrodynamic retarder simultaneously operating as the cooling medium pump and providing a pumping effect on the cooling medium for circulating the cooling medium in the cooling circuit; wherein, the secondary blade wheel is associated with one of a brake and a drive running counter to the drive of the primary blade wheel in such a way that the secondary blade wheel can, in a braking operation, be one of fixed by the brake and driven counter to the rotational direction of the primary blade wheel by the drive running counter to the drive of the primary blade wheel in order to hydrodynamically brake the primary blade wheel and, can, in a pumping operation, be one of partially and completely released such that the secondary blade wheel circulates at one of a speed of the primary blade wheel and a specified speed difference slower than the primary blade wheel together with the primary blade wheel in the same direction. |
