Line pressure control for automatic transmission

Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Preselected indexed position

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74867, B60K 4106

Patent

active

050054414

ABSTRACT:
An automatic transmission is disclosed wherein an accumulator back-up pressure is variable in response to engine load and also to the progress of a shift taking place. A line pressure solenoid is provided which controls a signal pressure supplied to an accumulator control valve which generates the accumulator back-up valve supplied to an accumulator that is arranged to soften an increase in servo activating hydraulic fluid pressure supplied to a frictional device during the shift.

REFERENCES:
patent: 4346627 (1982-08-01), Kawamoto et al.
patent: 4584908 (1986-04-01), Nishikawa et al.
patent: 4631982 (1986-12-01), Miki et al.
patent: 4680992 (1978-07-01), Hayasaki et al.
patent: 4721018 (1988-01-01), Harada et al.
patent: 4745826 (1988-05-01), Nishikawa et al.
patent: 4785689 (1988-11-01), Iwatsuki
patent: 4807496 (1989-02-01), Hayasaki et al.
patent: 4850251 (1989-07-01), Kawayama et al.
Nissan Full-Range Automatic Transmission RE4R01A Type, Service Manual, (A261C07) issued on Mar. 1987, by Nissan Motor Company Limited.

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