Electronic throttle control apparatus for internal...

Details Electronic throttle control apparatus for internal... Electronic throttle control apparatus for internal...

2007-06-12

2007-06-12

Argenbright, T. M. (Department: 3747)

Internal-combustion engines

Engine speed regulator

Open loop condition responsive

C123S399000

Reexamination Certificate

active

11370090

ABSTRACT:
An electric throttle control apparatus for an internal combustion engine includes a throttle motor that operates the throttle valve. A throttle control unit controls driving duty for operating the throttle motor. The throttle control unit determines a tapping operation for learning a full close position of the throttle valve to be completed when the accelerator position is at a substantially minimum position, the opening degree of the throttle valve is substantially constant in the vicinity of the full close position, and the driving duty for operating the throttle motor with respect to a close direction of the throttle valve becomes equal to or greater than a threshold. The throttle control unit restricts the driving duty to be equal to or less than a driving duty limiting value, thereby maintaining the throttle valve in the full close position, when the throttle control unit determines the completing condition to be satisfied.

REFERENCES:
patent: 5828193 (1998-10-01), Furuta
patent: 5950597 (1999-09-01), Kamio et al.
patent: 6636783 (2003-10-01), Yasui et al.
patent: 6701891 (2004-03-01), Niki et al.
patent: 2002/0193935 (2002-12-01), Hashimoto et al.
patent: 3562938 (2004-06-01), None

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