Interrelated power delivery controls – including engine control – Transmission control – Transmission controlled by engine
Patent
1998-10-08
2000-02-08
Marmor, Charles A
Interrelated power delivery controls, including engine control
Transmission control
Transmission controlled by engine
477906, 477174, 475127, F16H 6126, F16H 6112
Patent
active
06022293&
ABSTRACT:
A method and apparatus are provided for controlling the hydraulic line pressure in an automatic transmission for a vehicle in response to the measured pressure and torque transmitted through the transmission such that a minimum hydraulic line pressure is provided to the frictional elements to achieve a non-slip condition through the transmission which increases transmission efficiency and fuel economy. Hydraulic line pressure is controlled by activating a solenoid activated valve. Control signals are based on measured hydraulic line pressure, engine speed, turbine speed, vehicle speed, driver selected gear, and torque converter operating condition for the solenoid actuated valve. The present invention further provides a closed-loop adaptive control technology to learn the minimum line pressure to compensate for variability in the clutch return springs, friction characteristics, surface finishes, as well as hydraulic wear, and changes over the life of the transmission. Further, when one of the line pressure components fails, the method provides open loop control.
REFERENCES:
patent: 3631744 (1972-01-01), Blomquist et al.
patent: 3956947 (1976-05-01), Leising et al.
patent: 4106367 (1978-08-01), Bouvet
patent: 4289048 (1981-09-01), Mikel et al.
patent: 4505368 (1985-03-01), Ackermann et al.
patent: 4781080 (1988-11-01), Iwatsuki
patent: 4836055 (1989-06-01), Suzuki
patent: 4875391 (1989-10-01), Leising et al.
patent: 5060540 (1991-10-01), Yamaguchi
patent: 5074167 (1991-12-01), Yoshimura et al.
patent: 5093789 (1992-03-01), Yoshimura et al.
patent: 5103692 (1992-04-01), Shimanaka et al.
patent: 5305663 (1994-04-01), Leonard et al.
patent: 5449329 (1995-09-01), Brandon et al.
patent: 5458545 (1995-10-01), Adam et al.
patent: 5630773 (1997-05-01), Slicker et al.
patent: 5803869 (1998-09-01), Jamzadeh et al.
Dourra Hussein A.
Leising Maurice B.
Parenti David
Calcaterra Mark P.
Chrysler Corporation
Ho Ha
Marmor Charles A
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