Patent · US Expired

Drive unit and method for operating a drive unit

US5657838A · kind A · utility

14Cited by

5References

8Claims

0Family size

Assignee

Voith Turbo GmbH & Co. KG · DE

Inventors

Klaus Vogelsang · Crailsheim, DE
Peter Edelmann · Oettingen, DE

Key dates

Filing date	May 20, 1996
Grant date	Aug 19, 1997
Priority date	—
Expiry date	May 20, 2016

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF01P2060/06
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A drive unit for vehicles with an engine and a gearbox, and with a hydrodynamic retarder. The retarder is in constant drive connection with the engine. The unit includes a coolant circuit whose coolant is at the same time the working medium of the retarder, and the retarder can be utilized as a coolant pump. The retarder is arranged before the gearbox, and the retarder can be united with an engine brake to an overall brake unit (OBU). The overall brake unit is configured such that the retarder can in a braking operation engage sooner than the engine brake.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.