Pressure regulating device for use in an automatic transmission

Details Pressure regulating device for use in an automatic transmission Pressure regulating device for use in an automatic transmission

1980-09-08

1983-10-11

Michalsky, Gerald A.

Power plants

Pressure fluid source and motor

Coaxial impeller and turbine unit

60337, 60339, F16H 4104

Patent

active

044084625

ABSTRACT:
A pressure regulating device for use in a hydraulic control system for an automatic transmission having a torque convertor, a gear transmission and an hydraulic control system provides a first pressure regulating valve for regulating the pressurized fluid output from a pump to a line pressure level, and applying the line pressure to the hydraulic control system. A second pressure regulating valve regulates the pressure of an excess portion of fluid supplied to the hydraulic control system from the first pressure regulating valve, and supplies the excess fluid to the torque convertor and regions requiring lubrication. Overheating of fluid in the torque convertor is prevented at low pressures by a bypass passage which assures at least a minimum fluid flow through the torque convertor at all times.

REFERENCES:
patent: 4188839 (1980-02-01), Kubo et al.

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