Hydraulic control system for controlling oil pressure based on t

Details Hydraulic control system for controlling oil pressure based on t Hydraulic control system for controlling oil pressure based on t

1994-07-26

1996-09-24

Ta, Khoi Q.

Interrelated power delivery controls, including engine control

Transmission control

Control by sensed ambient condition, pattern indicia,...

F16H 6104

Patent

active

055585973

ABSTRACT:
A hydraulic control system for an automatic transmission having frictional devices and a valve mechanism for feeding an oil pressure to the frictional devices. This hydraulic control system controls the applying pressure of the frictional devices directly on the basis of electric signals. For this control, the hydraulic control system comprises: an oil temperature detector for detecting the temperature of the oil to actuate the frictional devices; and an oil pressure command value output unit for making the output interval of the oil pressure command value to be outputted at a plurality of stages, that is, at least any one of lapse time periods till a subsequent oil pressure command value Is outputted, longer in case the detected oil pressure is low, than in case the detected oil pressure is high.

REFERENCES:
patent: 4690017 (1988-09-01), Taniguchi et al.
patent: 4998449 (1991-03-01), Baba et al.
patent: 5014575 (1991-05-01), Fujiwara et al.
patent: 5029492 (1991-07-01), Kiuchi
patent: 5058014 (1991-10-01), Saitou et al.
patent: 5072630 (1991-12-01), Kikuchi et al.
patent: 5211680 (1993-05-01), Sumimoto et al.
patent: 5293789 (1994-03-01), Goto et al.

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