Control system 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

050902709

ABSTRACT:
A flow restricting structure is defined by a conduit which fluidly connects a friction element and a hydraulic pressure source. A flow control device is incorporated with the flow restricting structure in a manner to control the flow rate of hydraulic fluid from the hydraulic pressure toward the friction element. An electric control unit is employed for controlling the flow control device in a manner to keep the flow rate at a maximum until a given period of time passes following a N-D select. The given period of time is variable in accordance with operation modes of an engine. The electric control unit may be so arranged as to make the flow restricting structure substantially inoperative for a first given period of time following the N-D select and to make the flow restricting structure gradually operative for a second given period of time following the first period of time.

REFERENCES:
patent: 4252148 (1981-02-01), Fochtman et al.
patent: 4561528 (1985-12-01), Sugano
patent: 4602529 (1986-07-01), Sugano
patent: 4706523 (1987-11-01), Nishikawa et al.
patent: 4733581 (1988-03-01), Hasegawa et al.
patent: 4748870 (1988-06-01), Sugino et al.
patent: 4763545 (1988-08-01), Shibayama et al.
patent: 4770066 (1988-09-01), Hayasaki et al.
patent: 4831899 (1989-05-01), Honig
patent: 4833946 (1989-05-01), Lemieux
1984 Nissan Automatic Transmission Service Manual, pp. 56 & 58.

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