Oil pressure control means for an automatic transmission

Details Oil pressure control means for an automatic transmission Oil pressure control means for an automatic transmission

1977-04-27

1979-04-10

Scott, Samuel

Machine element or mechanism

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

Preselected indexed position

74867, 74865, 74752C, B60K 4110

Patent

active

041482328

ABSTRACT:
An oil pressure control means for operating an automatic transmission for automobiles in a manner to establish various speed shift stages in accordance with the balance of the throttle pressure and the governor pressure, including a combination of a thermo-sensitive control means operable in response to the engine temperature and an oil passage change-over means, said combination being adapted to supply the line pressure in lieu of the throttle pressure to a speed shift valve which establishes the highest speed stage when the engine is not yet warmed up thereby positively shifting the speed shift valve to the lower speed shift position by over-balancing the governor pressure by the line pressure.

REFERENCES:
patent: 4036082 (1977-07-01), Onuma
patent: 4036626 (1977-07-01), Udagawa

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