Hybrid drive for a motor vehicle
AssigneeMercedes-Benz AG
InventorChristian Bader
Life of this patent
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Abstract
In a hybrid drive for a motor vehicle, a three-phase machine fed by a three-phase converter is coupled via the layshaft of the gearbox to a conventional internal-combustion engine drive train. Both the internal combustion engine and the three-phase machine can be of conventional design. In addition to the known operating modes of a hybrid drive, the three-phase machine serves as a synchronization aid for the gear change in that the layshaft is accelerated in a suitable manner during the shifting operation. As a result, the mechanical synchronization devices in the gearbox have virtually no friction work to perform and can be of correspondingly smaller dimensions.
Claims10
A hybrid drive for a motor vehicle, comprising:
- an internal combustion engine connected via a clutch and a gearbox to a drive shaft, said gearbox including a layshaft drivingly connected to the driveshaft,
- a three-phase machine with electrical power supply thereto via a three-phase converter,
- and a continuous mechanical connection between a rotor of the three-phase machine and the layshaft providing a common axis for both the rotor and the layshaft,
- whereby power flow between the three-phase machine and said layshaft is solely determined by electrical control of the three-phase machine via the three-phase converter.
Dependencies are inferred from the claim text.