Inductive rotation angle sensor and motor-driven airflow...

Details Inductive rotation angle sensor and motor-driven airflow... Inductive rotation angle sensor and motor-driven airflow...

2007-10-09

2010-12-07

Fristoe, Jr., John K (Department: 3753)

Valves and valve actuation

Electrically actuated valve

Rotary electric actuator

C137S554000, C324S207250

Reexamination Certificate

active

07845616

ABSTRACT:
A motor-driven airflow control device is provided wherein an inductance-based non-contact rotation angle sensor is compactly formed at an end of a throttle shaft. An exciting conductor is attached at an end of a rotating shaft to which a throttle valve is attached, a window hole is provided on a gear cover, a stationary substrate with energizing and signal-generating conductors formed thereon is attached to the gear cover so as to face the exciting conductor on the rotating shaft side through the window hole, and the window hole of the gear cover is covered by a thin shield member. The energizing and signal-generating conductors can be shielded from a space where the exciting conductor of the rotary member is arranged, making it possible to obtain a highly reliable motor-driven airflow control device including an inductance-based non-contact rotation angle sensor which is not affected by environments on the rotary member side.

REFERENCES:
patent: 4392375 (1983-07-01), Eguchi et al.
patent: 5730861 (1998-03-01), Sterghos et al.
patent: 6018241 (2000-01-01), White et al.
patent: 6518750 (2003-02-01), Lin et al.
patent: 6886800 (2005-05-01), Fauni
patent: 2003-254782 (2003-09-01), None

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