Gearing with speed responsive starting clutches

Details Gearing with speed responsive starting clutches Gearing with speed responsive starting clutches

1974-07-08

1976-02-17

Wyche, Benjamin W.

192 clutches and power-stop control

Transmission control and clutch control

Planetary transmission and coaxial clutch

74752C, 192 8712, 192103F, 192113B, F16H 374, F16H 536, F16D 2510

Patent

active

039386317

ABSTRACT:
A drive arrangement for an engine driven vehicle in which the clutch engaging pressure is controlled in response to engine speed and vehicle speed during startup. The fluid output pressure from an engine driven control pump, which supplies fluid for clutch engagement and transmission control, is directed through a control valve and a control restriction. As engine speed is increased, the fluid pressure and clutch engagement force increase at a controlled rate, due to the increasing line pressure caused by the control restriction, to permit controlled starting of the vehicle. An output driven governor supplies pressure proportional to vehicle output speed to the control valve such that, at a predetermined vehicle output speed, the control valve is shifted to discontinue fluid communication between the engine driven pump and the control restriction at which instant the pump pressure is controlled by the transmission control regulator valve.

REFERENCES:
patent: 794899 (1905-07-01), Sturtevant
patent: 2794349 (1957-06-01), Smirl
patent: 3177993 (1965-04-01), Riehl
patent: 3263782 (1966-08-01), Smirl et al.
patent: 3823621 (1974-07-01), Kubo et al.

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