Clutch state determining device

Details Clutch state determining device Clutch state determining device

2007-02-20

2007-02-20

Le, David D. (Department: 3681)

Interrelated power delivery controls, including engine control

Clutch control

C477S077000, C477S083000, C477S177000, C477S181000, C701S067000, C123S406240, C123S436000

Reexamination Certificate

active

11008738

ABSTRACT:
If a user presses a clutch pedal to perform gear-shifting operation while a vehicle is traveling, a clutch disc, which has been engaged with a flywheel rotating with an engine, is brought to partial clutch engagement and slides on an end surface of the flywheel to generate friction. Thus, a first phenomenon in which a decreasing rate of the engine rotation speed rapidly increases occurs. Then, a second phenomenon in which the clutch disc is completely disengaged from the flywheel to eliminate the friction and the decreasing rate of the engine rotation speed returns to an original state occurs. If the first and second phenomena are detected successively when neither an engine side nor a power transmission system side transmits power for varying an engine rotation speed, it is determined that the clutch disc is disengaged.

REFERENCES:
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patent: 6347275 (2002-02-01), Nakano
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patent: 2002/0060114 (2002-05-01), Maruyama
patent: 1 217 242 (2002-06-01), None
patent: 1 382 876 (2004-01-01), None
patent: 2002-266895 (2002-09-01), None

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