Electronic inching control strategy

Details Electronic inching control strategy Electronic inching control strategy

1998-12-21

2003-11-11

Cuchlinski, Jr., William A. (Department: 3661)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

Transmission control

C701S067000, C701S068000, C192S003580, C192S003570, C192S003540, C192S058600, C192S058630, C192S032000, C477S076000

Reexamination Certificate

active

06647332

ABSTRACT:

TECHNICAL FIELD
The present invention relates generally to a transmission control strategy and more particularly to a method and apparatus for controlling the fluid pressure of an inching clutch.
BACKGROUND OF THE INVENTION
Transmissions on earth moving machines, such as track type tractors and motorgraders, have many different gear ratios that are each provided by engaging certain ones of a plurality of fluid actuated clutches. These clutches are normally engaged by directing pressurized fluid through respective pressure modulation valves that are likewise controlled by electronic clutch pressure control valves. The electronic clutch pressure control valves are controlled in response to receipt of an electrical signal received from a controller. Many times it is desirable to have a smooth transition from neutral to a gear, for example, when hitching up an implement in a confined space. However, in current systems, when the gears are changed there is a “jerk” when the appropriate clutch is engaged. The “jerk” is due to the inching clutch being filled to slowly or rapidly. The “jerk” leads to operator fatigue and transmission wear.
The present invention is directed to overcoming one or more of the problems set forth above.
DISCLOSURE OF THE INVENTION
In one aspect of the present invention, a method is provided for controlling the pressure of an actuating fluid associated with an inching clutch. The invention includes the steps of determining an actual pressure of the fluid, and responsively controlling the pressure.
In another aspect of the present invention an apparatus for controlling the pressure of an actuating fluid flowing through a valve and an inching clutch is disclosed. The apparatus includes a pressure sensing device adapted to sense an actual pressure of the actuating fluid and generate an a pressure signal and a controller adapted to receive the pressure signal, establish an inching pressure threshold, responsively control the pressure of the fluid.


REFERENCES:
patent: 4199048 (1980-04-01), Ishikawa
patent: 4643285 (1987-02-01), Horsch
patent: 4678069 (1987-07-01), Yoshimura et al.
patent: 4781080 (1988-11-01), Iwatsuki
patent: 4790420 (1988-12-01), Hata et al.
patent: 4865176 (1989-09-01), Blake et al.
patent: 4979599 (1990-12-01), Nishida
patent: 4982622 (1991-01-01), Yamamoto et al.
patent: 4987982 (1991-01-01), Yamaguchi
patent: 5069084 (1991-12-01), Matsuno et al.
patent: 5101943 (1992-04-01), Bulgrien
patent: 5311974 (1994-05-01), Rueb
patent: 5438887 (1995-08-01), Simmons
patent: 5450768 (1995-09-01), Bulgrien et al.
patent: 5456333 (1995-10-01), Brandt et al.
patent: 5464085 (1995-11-01), Churchill
patent: 5520593 (1996-05-01), Yesel et al.
patent: 5537886 (1996-07-01), Toyama
patent: 5587905 (1996-12-01), Yesel et al.
patent: 5613581 (1997-03-01), Fonkalsrud et al.
patent: 5722912 (1998-03-01), Narita
patent: 5957260 (1999-09-01), Kunii
patent: 6007453 (1999-12-01), Ohkuma et al.
patent: 6102829 (2000-08-01), Muddell et al.

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