Intake air control apparatus for an engine

Details Intake air control apparatus for an engine Intake air control apparatus for an engine

2005-04-26

2005-04-26

Mohanty, Bibhu (Department: 3747)

Internal-combustion engines

Engine speed regulator

Specific throttle valve structure

Reexamination Certificate

active

06883494

ABSTRACT:
An air control apparatus for an engine can relax the tolerance of positional accuracy in the mounting of a rotational angle detection sensor. The intake air control apparatus includes: a shaft (6); a throttle valve (7) fixedly secured to the shaft (6) for adjusting the degree of opening in an intake passage through a rotational angle thereof; a permanent magnet (12) provided on an end portion of the shaft (6) with its N pole and S pole being positioned in a diametral direction thereof; and a rotational angle detection sensor (14) having a magnetoresistive element disposed in a spaced parallel relation with respect to the permanent magnet (12) for detecting a change in the azimuth of magnetic flux of the permanent magnet (12) thereby to sense a rotational angle of the throttle valve (7).

REFERENCES:
patent: 5431141 (1995-07-01), Kanazawa et al.
patent: 5644082 (1997-07-01), Iwata et al.
patent: 6565067 (2003-05-01), Nanba et al.
patent: 6739312 (2004-05-01), Komeda et al.
patent: 9-72706 (1997-03-01), None
patent: 11-94512 (1999-04-01), None
patent: 2001-289610 (2001-10-01), None

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