Interrelated power delivery controls – including engine control – Transmission control – Including fluid drive
Patent
1996-08-29
1998-03-03
Marmor, Charles A.
Interrelated power delivery controls, including engine control
Transmission control
Including fluid drive
477 76, 477174, 477176, 477901, 192 331, F16H 6114
Patent
active
057229120
ABSTRACT:
A lock-up control system for an automatic transmission of an automotive vehicle controls operation of a lock-up clutch for mechanically engaging the automatic transmission with the engine to enable transmission of a driving force output from the engine to the automatic transmission. An engaging force of the lock-up clutch is controlled in an predetermined operating region of the automotive vehicle, which is determined based on operating conditions of the automotive vehicle and the engine, in such a manner that an amount of slip of the lock-up clutch becomes equal to a desired value. An engaging force control amount for controlling the engaging force of the lock-up clutch is learned when the automotive vehicle is traveling in the predetermined operating region with the automatic transmission being in a predetermined speed position, and a learned value thus obtained is stored. The engaging force control amount is calculated by correcting the stored learned value according to load on the engine, when the automotive vehicle is traveling with the automatic transmission being in a speed position which is suitable for a lower traveling speed of the automotive vehicle than the predetermined speed position. The engaging force of the lock-up clutch is controlled by the use of the corrected engaging force control amount, when the automotive vehicle is traveling with the automatic transmission being in the above speed position which is suitable for the lower speed of the automotive vehicle.
REFERENCES:
patent: 4768635 (1988-09-01), Sakurai et al.
patent: 4911275 (1990-03-01), Ohkumo et al.
patent: 5434780 (1995-07-01), Kume et al.
patent: 5643136 (1997-07-01), Kono et al.
patent: 5651752 (1997-07-01), Wakahara et al.
Estremsky Sherry Lynn
Honda Giken Kogyo Kabushiki Kaisha
Marmor Charles A.
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