Hybrid drive for a motor vehicle

U.S. Patent Number: 5337848

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.

Inventors: Bader; Christian (Boblingen, DE)

Assignee: Mercedes-Benz AG (Stuttgart, DE)

Application Number: 07/993,595

Issued: 1994-08-16

Expired: 2006-08-16

Classes: 180/65.2 ; 180/65.7; 477/4; 477/5; 903/909; 903/926; 903/942

Field of search: 180/65.2,65.3,65.7,65.8,65.6,343,344 74/847,848,866

Click the image above to view patent images at uspto.gov within a frame.

Click here for the fulltext page on uspto.gov within a frame.