Hydrodynamic retarder with a centrifugal accumulator

Details Hydrodynamic retarder with a centrifugal accumulator Hydrodynamic retarder with a centrifugal accumulator

1986-12-04

1987-12-08

Kashnikow, Andres

Brakes

Internal-resistance motion retarder

Using a rotary-type fluid damper

188290, 60357, 60366, F16D 5700, F16D 5702, F16D 3306, F16D 3300

Patent

active

047113286

ABSTRACT:
A hydrodynamic retarder has a centrally disposed chamber which is filled with hydraulic fluid and subjected to centrifugal forces. A valve mechanism, responsive to the operator, is opened by a control valve system when vehicle retarding action is requested to permit rapid filling of the retarder vane space from the centrally disposed chamber. The valve mechanism is also closed by the control valve system after a predetermined time. This accommodates fast filling of the retarder but does not permit air ingestion by the retarder. A passage, in the stationary housing portion of the retarder, is opened to the transmission pump circuit during retarding action to maintain the retarder pressure and fluid circulation for cooling. The central chamber has an air control valve to admit air to the chamber as the chamber empties of hydraulic fluid and to permit air exhaust therefrom when the chamber is refilled.

REFERENCES:
patent: 3122220 (1964-02-01), Hoffstrom
patent: 4488626 (1984-12-01), Handke

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