Lock-up clutch flow-limiting and pressure-reducing valve

Details Lock-up clutch flow-limiting and pressure-reducing valve Lock-up clutch flow-limiting and pressure-reducing valve

1974-11-07

1976-04-13

Wyche, Benjamin W.

192 clutches and power-stop control

Vortex-flow drive and clutch

Including drive-lockup clutch

192 326, 192 357, 192 8713, 192109F, 1376256, B60K 2900, F16D 3900

Patent

active

039498476

ABSTRACT:
A power shift transmission having a torque converter with a lock-up clutch for locking the impeller to the turbine of the torque converter to provide direct drive from the engine to the input end of the transmission includes a flow-limiting pressure-reducing valve, between the source of pressurized fluid for actuating the clutches of the system, for reducing the pressure and flow of the fluid to the pressure-actuated lock-up clutch below the pressure for the actuation of the remainder of the clutches in the system. This system provides a smoother operation of the lock-up clutch as well as prevents the creation of a high pressure drop within the actuating fluid system.

REFERENCES:
patent: 2707887 (1955-05-01), Slack
patent: 3326066 (1967-06-01), Murphy
patent: 3352392 (1967-11-01), Black et al.
patent: 3682043 (1972-08-01), Bailey et al.
patent: 3820417 (1974-06-01), Allen et al.

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