Drive unit and method for operating a drive unit

Details Drive unit and method for operating a drive unit Drive unit and method for operating a drive unit

1996-05-20

1997-08-19

Graham, Matthew C.

Brakes

Operators

Fluid pressure

188264F, B60T 1087

Patent

active

056578385

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.

REFERENCES:
patent: 2421056 (1947-05-01), Dake et al.
patent: 2997144 (1961-08-01), Gsching et al.
patent: 3650358 (1972-03-01), Bessiere
patent: 3720372 (1973-03-01), Jacobs
patent: 3951242 (1976-04-01), Fischer et al.

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