Interrelated power delivery controls – including engine control – Transmission control – Transmission controlled by engine
Patent
1994-12-15
1996-07-30
Bonck, Rodney H.
Interrelated power delivery controls, including engine control
Transmission control
Transmission controlled by engine
477155, F16H 6106, F16H 6108
Patent
active
055406343
ABSTRACT:
A hydraulic control system of a four-speed automatic transmission whereby second-to-fourth skip shifting or fourth-to-second skip shifting is possible. Line pressure is controlled variably to improve the power train efficiency and the response of shifting time during gear shifting. The exhaust port of the pressure control valve, which is controlled by the line pressure varying solenoid valve according to a duty ratio, is selectively opened to control line pressure. First and second pressure control solenoid valves are controlled according to a duty ratio such that the shift valves are controlled by drive pressure and speed line pressure.
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patent: 5159856 (1992-11-01), Yoshimura et al.
patent: 5367922 (1994-11-01), Jan
Jang Jaeduk
Lim Dokee
Bonck Rodney H.
Estremsky Sherry
Hyundai Motor Company
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