Hydraulic retarder for multi-speed power transmissions

Details Hydraulic retarder for multi-speed power transmissions Hydraulic retarder for multi-speed power transmissions

1979-07-17

1981-04-21

Krizmanich, George H.

192 clutches and power-stop control

Vortex-flow drive and clutch

With brake

192 12A, B60K 4124

Patent

active

042627818

ABSTRACT:
A hydraulic retarder in conjunction with a multi-speed power transmission that finds particular utility for off-highway trucks. The hydraulic retarder is continuously filled with oil and is positioned in series with a hydraulically actuated friction type clutch. The retarder remains filled at all times and consequently there is no loss of time in filling or dumping the retarder when it is desired to utilize its retarding action by engaging its clutch.
This "instantaneous" reaction to engagement and disengagement of the retarder makes it possible to use this retarder in certain automatic modes where conventional dump and fill hydrodynamic retardation devices are so slow to react as to be difficult to apply. This retarder has clutched engagement and disengagement. The torque capacity versus speed is varied through cavity pressure control.

REFERENCES:
patent: 2990919 (1961-07-01), Christenson et al.
patent: 3146630 (1964-09-01), Ivey
patent: 3319491 (1967-05-01), Simpson
patent: 3572177 (1971-03-01), Ishihara
patent: 3777860 (1973-12-01), Forster et al.
patent: 3987874 (1976-10-01), Fuehrer et al.

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