Transmission with retarder and controls

Details Transmission with retarder and controls Transmission with retarder and controls

1975-06-24

1976-10-26

Halvosa, George E. A.

Brakes

Internal-resistance motion retarder

Using a rotary-type fluid damper

60366, 188264E, 192 334, 192 4B, F16D 5704

Patent

active

039878740

ABSTRACT:
A dual chamber hydrodynamic retarder in a torque converter and power shift gear transmission. The retarder inlet at a point in the stator housing extends radially inward into a radial outer port of one stator in alignment with toric flow. The toroidal flow is divided by transfer ports extending radially outward and axially in the rotor to the other chamber to simultaneously fill both chambers. Each chamber has an outlet at a point in the stator and within its outer diameter dividing axial toric flow into outlet flow and continuing toric flow. Both the inlet and outlet provide toric flow pumping. The retarder valve, in the retarder off position, connects the retarder outlet to a dump exhaust, blocks the retarder inlet and connects a fluid supply through the cooler to a regulator valve regulating supply pressure at a low value, and throughout a range of retarder on positions connects without change of restriction in a loop circuit, the retarder outlet and supply through the cooler to the retarder inlet and a control exhaust is initially wide open for minimum pressure and retarding and closed exponentially relative to stroke to increase pressure and retarding until limited by the regulator valve.

REFERENCES:
patent: 2742981 (1956-04-01), Waldron
patent: 2768711 (1956-10-01), Cline
patent: 2786552 (1957-03-01), LaMater et al.
patent: 3383910 (1968-05-01), Tanaka
patent: 3659687 (1972-05-01), Edmunds

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