DEVICE AND METHOD FOR ELECTRONICALLY CONTROLLING FUEL INJECTION

WIPO Patent Application WO/2004/092573

A1

In a fuel injection device, vapor is discharged only when required to enhance fuel injection characteristics. A fuel injection device has a plunger (21) for sucking and pressure-sending a fuel by reciprocating motion, a purge valve (26) for opening and closing a discharge opening (21a) to discharge vapor in a pressure-sending chamber (P), and a coil (24) applying electromagnetic drive force to the plunger (21). A valve portion (26a) formed from permanent magnet is provided at the purge valve (26). Switching the direction of an electric current in the coil (24) produces magnetic poles in the plunger (21), and attraction or repelling between a magnetic pole and the valve portion (26a) opens and closes the purge valve (26). This enables that purge drive is performed only when required so that vapor is efficiently discharged. Further, the coil that drives the plunger also functions as the source of electromagnetic force for driving the purge valve, and this makes it possible that the structure of the device is simplified, the device is downsized, and power consumption is reduced.

YAMAZAKI SHIGERU (JP)

PCT/JP2004/005294

October 28, 2004

April 14, 2004

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MIKUNI KOGYO KK (JP)
YAMAZAKI SHIGERU (JP)

F02D41/00; F02D41/20; F02M37/00; F02M37/08; F02M37/20; F02M51/04; F02M55/00; F02M57/02; F02M69/02; F02M69/04; F02B61/02; F02M59/46; F02M61/08; F02M63/00; (IPC1-7): F02M37/08; F02M37/20; F02M51/00; F02M51/04

JP2001221137A	2001-08-17
JP2002155828A	2002-05-31
JPH11257177A	1999-09-21
JPH01303389A	1989-12-07

Yashima, Keiichi (Hosokawa Building 1-17, Akasaka 1-chom, Minato-ku Tokyo 52, JP)

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