Electromagnetically operated valve assembly for use in internal

Details Electromagnetically operated valve assembly for use in internal Electromagnetically operated valve assembly for use in internal

1989-12-18

1991-04-23

Argenbright, Tony M.

Internal-combustion engines

Poppet valve operating mechanism

Electrical system

2511291, F01L 904

Patent

active

050092022

ABSTRACT:
An electromagnetically operated valve assembly for use in an internal combustion engine includes a valve, serving as an intake or exhaust valve, made of a ceramic material for reduced weight and good response in operation. The valve assembly also includes an electromagnetic actuator comprising a movable member mounted on the upper end of the valve stem of the valve and having a frustoconical flange portion on an end thereof, and a fixed member disposed above the movable member in confronting relation thereto and having a recessed portion complementary in shape to the frustoconical flange portion. With this arrangement, while the valve is made of a nonmagnetic ceramic material, a sufficient magnetic path cross-sectional area is maintained through the movable member without increasing the size of the movable member.

REFERENCES:
patent: 1460517 (1923-07-01), Stevens
patent: 3223802 (1965-12-01), Horst
patent: 4378766 (1983-04-01), Yamazoe et al.
patent: 4938179 (1990-07-01), Kawamura

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