Interrelated power delivery controls – including engine control – Transmission control – Transmission controlled by engine
Patent
1997-10-29
1999-07-06
Ta, Khoi Q.
Interrelated power delivery controls, including engine control
Transmission control
Transmission controlled by engine
477158, 477130, F16H 6126
Patent
active
059191139
ABSTRACT:
Disclosed is a hydraulic control system for automatic transmissions including a plurality of friction elements, comprising a hydraulic pressure source; hydraulic pressure regulating parts for controlling hydraulic pressure from the hydraulic pressure source; damper clutch control parts for actuating a damper clutch of the torque converter by supplying hydraulic pressure fed from the pressure regulating parts to the torque converter; shift control parts for selecting a shift mode by converting hydraulic pressure from the pressure regulating parts into drive pressure; hydraulic pressure control parts for controlling the drive pressure from the shift control parts; and hydraulic pressure distributing parts for suitably distributing hydraulic pressure from the hydraulic pressure control parts to each friction element, said hydraulic pressure distributing parts comprising a 1-2 shift valve; a 2-3/4-3 shift valve; and shift timing control parts having a shift timing control valve for supplying hydraulic pressure to an end clutch and to a kickdown servo, and a solenoid valve for controlling hydraulic pressure supply timing from the shift timing control valve to said end clutch and kickdown servo by control of a transmission control unit; and hydraulic pressure compensating parts for maintaining a suitable level of end clutch.
REFERENCES:
patent: 5537887 (1996-07-01), Jang
patent: 5540634 (1996-07-01), Jang et al.
patent: 5658220 (1997-08-01), Jang
patent: 5674153 (1997-10-01), Jang
Hyundai Motor Company
Ta Khoi Q.
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