Oil pressure control system for an automatic transmission system

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

1975-10-07

1978-08-15

Wyche, Benjamin W.

Machine element or mechanism

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

Preselected indexed position

74868, 74865, B60K 2100

Patent

active

041063694

ABSTRACT:
An oil pressure control system for an automatic transmission system which includes a fluid torque converter a transmission gear and friction engaging means adapted to be selectively supplied with line pressure for establishing a selected transmission engagement in said transmission gear, said oil pressure control system including a throttle pressure modulating valve which generates a throttle modulated pressure reduced from a throttle pressure, whereby a valve member of a speed shift valve incorporated in said oil pressure control system is shifted due to a balance between a governor pressure and said throttle or throttle modulated pressure to provide a hysteresis in shifting of said speed shift valve.

REFERENCES:
patent: 3683721 (1972-08-01), Uozumi et al.
patent: 3747439 (1973-07-01), Uozumi et al.
patent: 3895542 (1975-07-01), Migauchi
patent: 3937107 (1976-02-01), Lentz

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