Throttling control valve and a system for controlling downshift

Details Throttling control valve and a system for controlling downshift Throttling control valve and a system for controlling downshift

1978-06-12

1980-02-19

Holko, Thomas J.

Machine element or mechanism

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

Preselected indexed position

1376253, B60K 1700

Patent

active

041888391

ABSTRACT:
A throttling control valve having a spool-like valve element which is gradually shifted in accordance with increase of a control fluid pressure so as to provide four different passage connections therethrough so as to be able to provide four different flow resistances, and a system for controlling downshift timing of an automatic transmission for vehicles which employs this throttling control valve so as to change delay time in supplying fluid pressure to a lower speed friction engaging means in accordance with governor pressure.

REFERENCES:
patent: 2788678 (1957-04-01), Sheppard
patent: 3587353 (1971-06-01), Iisima
patent: 3587354 (1971-06-01), Oguma
patent: 3685372 (1972-08-01), Miyazaki
patent: 3747439 (1973-07-01), Uozomi et al.
patent: 3765454 (1973-10-01), Carl
patent: 3774629 (1973-11-01), Enomoto
patent: 3949627 (1976-04-01), Murakami
patent: 3978743 (1976-09-01), Murakami
patent: 4050332 (1977-09-01), Taga
patent: 4106369 (1978-08-01), Taga

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