Valve system for shockless downshift to engine braking

Details Valve system for shockless downshift to engine braking Valve system for shockless downshift to engine braking

1990-05-18

1992-11-10

Lorence, Richard

Machine element or mechanism

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

Preselected indexed position

B60K 4106

Patent

active

051614340

ABSTRACT:
An accumulator backup pressure which is electronically generated by a line pressure solenoid is applied to an overrunning clutch reduction valve. Thus, a working hydraulic pressure generated by the overrunning clutch reduction valve is variable with a vehicle speed and an engine brake running range selected by a driver. As a result, shockless downshift to engine braking is accomplished.

REFERENCES:
patent: 4351206 (1982-09-01), Lemieux et al.
patent: 4532829 (1985-08-01), Sugano
patent: 4653351 (1987-03-01), Downs et al.
patent: 4665776 (1987-05-01), Sugano
patent: 4730521 (1988-03-01), Hayasaki et al.
patent: 4753134 (1988-06-01), Hayasaki
patent: 4776240 (1988-10-01), Miki
patent: 4817472 (1989-04-01), Kubo et al.
patent: 4817474 (1989-04-01), Morisawa
patent: 4843917 (1984-07-01), Van Selous et al.
patent: 4903550 (1990-02-01), Kuwayama et al.
"Nissan Full-Range Electronically Controlled Automatic Transmission Of The RE4R01A Type (A261C07)" published by Nissan Motor Co., Ltd. 1987.

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