ELECTROMAGNETIC TYPE FUEL INJECTION VALVE

Title:

ELECTROMAGNETIC TYPE FUEL INJECTION VALVE

Document Type and Number:

WIPO Patent Application WO/2001/066933

Kind Code:

A1

Abstract:

In an electromagnetic type fuel injection valve for internal combustion engines, a valve-driving electromagnetic coil bobbin (15) is made of a synthetic resin containing a filler having good thermal conductivity. The electromagnetic coil includes two kinds of coils (12, 13), different in characteristics from each other, that are axially-separately wound on one bobbin (15). One coil (12) is wound on the bobbin (15) such that it is closer to a movable element (19) than the other coil (13), and the outer diameter of the bobbin in the region where the other coil (13) is wound is smaller than the outer diameter of the bobbin in the region where one coil (12) is wound. Further, the inner diameter of the bobbin in the region where one coil (12) is wound has a level difference to form an annular space in which a seal ring (18) is disposed. The two kinds of coils (12, 13) are connected to a power supply and a switching element through a three-terminal connector.

Inventors:

HAMADA YASUNAGA (JP)
NAMAIZAWA YASUO (JP)

Application Number:

PCT/JP2000/001393

Publication Date:

September 13, 2001

Filing Date:

March 08, 2000

Export Citation:

Click for automatic bibliography generation Help

Assignee:

HITACHI LTD (JP)
HITACHI CAR ENG CO LTD (JP)
HAMADA YASUNAGA (JP)
NAMAIZAWA YASUO (JP)

International Classes:

F02D41/20; F02M51/00; F02M51/06; F02M61/16; F02M55/00; F02M63/00; (IPC1-7): F02M51/06

Domestic Patent References:

WO1991011611A2

1991-08-08

Foreign References:

JPS62225760A	1987-10-03
JPS5766263U	1982-04-20
JPH0742648A	1995-02-10
JPH10293940A	1998-11-04
JPH04198266A	1992-07-17
US5992391A	1999-11-30
JPH09115726A	1997-05-02
JPH1089518A	1998-04-10
GB1427995A	1976-03-10

Other References: