ACCUMULATOR FUEL FEED DEVICE

WIPO Patent Application WO/2002/001064

A1

An accumulator fuel feed device, comprising a fuel feed pump (1), a common rail (2) connected to the fuel feed pump (1) through fuel feed paths, and fuel injection nozzles (3) connected to the common rail (2) through fuel feed paths, wherein a pressure damping valve (20) formed only of a valve mechanism attenuating a pressure wave propagating from a downstream side is installed in the fuel feed paths (pipes 12 and 13) leading from the fuel feed pump (1) to the fuel injection nozzles (3), the pressure damping valve (20) comprising a reverse flow throttle valve having a valve disc energized against a flow from the upstream side to the downstream side in the fuel feed path and an orifice path with an orifice formed in the valve disc, whereby a pressure pulsation can be attenuated from the start of occurrence of the pressure pulsation, and the mechanism to attenuate the pulsation can be facilitated and downsized.

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ISHIMOTO MASAYORI (JP)
TAKAHASHI OSAMU (JP)
RYUZAKI KOTARO (JP)

PCT/JP2001/004061

January 03, 2002

May 16, 2001

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BOSCH AUTOMOTIVE SYSTEMS CORP (JP)
ISHIMOTO MASAYORI (JP)
TAKAHASHI OSAMU (JP)
RYUZAKI KOTARO (JP)

F02M37/00; F02M55/02; F02M55/04; F02M63/02; F02M63/00; (IPC1-7): F02M55/02; F02M47/00

JPH09170514A	1997-06-30
JPH0821333A	1996-01-23
JPH04252860A	1992-09-08
JPS49132324U	1974-11-14
JPS531518U	1978-01-09
JPS52114117U	1977-08-30

Onuki, Kazuyasu (Shibuya 1-chome Shibuya-ku, Tokyo, JP)

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