Hydraulic control system of automatic power transmission

Details Hydraulic control system of automatic power transmission Hydraulic control system of automatic power transmission

1978-10-02

1982-04-13

Braun, Leslie

Machine element or mechanism

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

Preselected indexed position

74867, 74868, B60K 4106, B60K 4110

Patent

active

043241549

ABSTRACT:
In a hydraulic control system of an automatic power transmission for an automotive vehicle, the frictional units in the transmission mechanism are operated by a line pressure which is regulated to vary with torque output of the engine and which is reduced to be variable with energy output of the engine when one frictional unit is to be actuated to make an upshift between predetermined forward drive gear ratios or reduced to a substantially constant when another frictional unit is to be actuated to make a downshift between other predetermined forward drive gear ratios for thereby reducing or eliminating shocks which would otherwise be created during the upshift or downshift.

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patent: 3908485 (1975-09-01), Miyauchi et al.
patent: 4033203 (1977-07-01), Hirosawa et al.
patent: 4106369 (1978-08-01), Taga

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