Transmission with torque converter and lock up clutch with lubri

Details Transmission with torque converter and lock up clutch with lubri Transmission with torque converter and lock up clutch with lubri

1981-06-29

1984-03-20

Braun, Leslie A.

Machine element or mechanism

Rotary member or shaft indexing, e.g., tool or work turret

Preselected indexed position

74868, 74869, B60K 4102

Patent

active

044373589

ABSTRACT:
An automatic transmission includes: a gear transmission mechanism which can provide several speed stages according to selective supply of hydraulic pressures from a control system; a hydraulic fluid pump; a torque converter incorporating a lock up clutch which is selectively engaged or disengaged according to selective supply of pressure; a line fluid pressure control valve which receives a supply of pressurized hydraulic fluid from the pump and which provides a supply thereof, regulated to a line pressure level, to the control system; and a torque converter fluid pressure control valve which receives a supply of pressurized hydraulic fluid from the pump, and which provides a supply thereof to the torque converter as a source of torque converter pressure for filling it with hydraulic fluid and for selectively either engaging or disengaging the lock up clutch, this supply of torque converter pressure being regulated to a proper level by the torque converter fluid pressure control valve, when the supply of hydraulic fluid from the hydraulic fluid pump is plentiful, diverting therefrom an overflow flow of hydraulic fluid, which, when available, is supplied to the lubricating system of the gear transmission mechanism, to which the torque converter hydraulic fluid pressure is also always supplied via a throttle element.

REFERENCES:
patent: 3000233 (1961-09-01), Roche
patent: 3497043 (1970-02-01), Leonard
patent: 3541893 (1970-11-01), Dyke et al.
patent: 3874254 (1975-04-01), Ahlen
patent: 4346626 (1982-08-01), Kawamoto
patent: 4349088 (1982-09-01), Ito et al.

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