Hydraulic control system of vehicle

Details Hydraulic control system of vehicle Hydraulic control system of vehicle

2011-05-31

2011-05-31

Fureman, Jared J (Department: 2836)

Electrical transmission or interconnection systems

Vehicle mounted systems

C307S010600, C477S099000, C477S163000

Reexamination Certificate

active

07952222

ABSTRACT:
A hydraulic control system includes a key detector that detects whether an ignition key is in an on state, a control portion that outputs different control signals according to whether the engine is on if the key is on, and a valve, such as a solenoid valve, that controls gear shifts according to the control signals from the control portion. A hydraulic control method includes determining whether an ignition key is on; determining whether an engine is on or off if the key is on; and controlling a valve, such as a solenoid valve, that controls gear shifts, differently depending on whether the engine is on or off, such as by applying different duty values to the valve. A low duty value may be applied to the valve when the engine is off, and a higher duty value may be applied to the valve when the engine is on.

REFERENCES:
patent: 5967941 (1999-10-01), Nishina et al.
patent: 6361472 (2002-03-01), Murasugi
patent: 6676230 (2004-01-01), Kuno et al.
patent: 2007/0283911 (2007-12-01), Nakamura et al.
patent: 63-266260 (1988-11-01), None
patent: 11-153216 (1999-06-01), None
patent: 10-0313797 (2002-02-01), None

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