Throttle valve opening and closing device

Details Throttle valve opening and closing device Throttle valve opening and closing device

2005-08-23

2005-08-23

Argenbright, Tony M. (Department: 3747)

Internal-combustion engines

Engine speed regulator

Specific throttle valve structure

C123S399000, C251S208000, C251S305000

Reexamination Certificate

active

06932051

ABSTRACT:
The invention is intended to simplify a default mechanism of a throttle valve opening and closing device for the purpose of improving mountability of the device to a vehicle. When a motor generate no driving forces, a throttle valve is held in a position (1) by a return spring. In this position, gaps are formed between the throttle valve and a wall surface of an intake passage. Spherical recesses are formed in parts of the wall surface of the intake passage. In a position (2) where the throttle valve is opposed to the spherical recesses, the gaps are minimized in an operating range of the throttle valve.

REFERENCES:
patent: 4947815 (1990-08-01), Peter
patent: 5492097 (1996-02-01), Byram et al.
patent: 5975051 (1999-11-01), Yamada et al.
patent: 6089208 (2000-07-01), Kowatari et al.
patent: 6454242 (2002-09-01), Garrick et al.
patent: 2-500677 (1990-03-01), None
patent: 11-153053 (1999-06-01), None

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