Lockup force control apparatus for fluid coupling in vehicle wit

Details Lockup force control apparatus for fluid coupling in vehicle wit Lockup force control apparatus for fluid coupling in vehicle wit

1998-04-10

1999-11-02

Wright, Dirk

Interrelated power delivery controls, including engine control

Transmission control

Including fluid drive

477176, F16H 6100

Patent

active

059760559

ABSTRACT:
In a high-load/low-vehicle velocity range that requires a torque-up effect of a torque converter (4) and shock absorption effect during transmission, the converter range is selected, and a lockup clutch (36) is fully released. On the other hand, in a low-load/high-vehicle velocity range that does not so require a shock absorption effect, the lockup range is selected, and the lockup clutch 36 is fully locked up to improve the mileage of an engine (3). Furthermore, in a low-load/low-vehicle velocity range, the slip range is selected, and the slip control for controlling the slip amount of the lockup clutch (36) to converge to a predetermined target slip amount is done, thus balancing between the torque-up effect, shock absorption effect, and the like, and the mileage, and the like.

REFERENCES:
patent: 4393467 (1983-07-01), Miki et al.
patent: 5434780 (1995-07-01), Kume et al.
patent: 5722912 (1998-03-01), Narita
patent: 5807204 (1998-09-01), Shiiba et al.

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