HIGH-PRESSURE FUEL SUPPLY PUMP EQUIPPED WITH ELECTROMAGNETICALLY DRIVEN INLET VALVE

WIPO Patent Application WO/2013/108489

A1

In order to inhibit spring and valve instability due to the introduced pressure when pressure in a pressurization chamber is introduced into a spring accommodating space in which a spring, which energizes the valve in the closing direction and which is provided between a valve stopper and a valve, is inserted, the present invention is configured such that: a pressure equalization hole connecting a peripheral fluid passage and the spring accommodating space provided between the valve and the valve stopper is provided to the valve stopper located between the valve and the pressurization chamber; and the spring-accommodating-space-side opening of the pressure equalization hole opens to a position further inside than the diameter of the spring. As a result, pressure from the pressurization chamber can be introduced to the inside of the spring without traversing the spring, thereby resolving spring and valve instability due to the introduced pressure. Moreover, the force applied to the valve when closing the valve is stabilized, which makes it possible to stabilize valve closing timing.

JPS5881379	【考案の名称】デイ-ゼルエンジンの燃料噴射装置
JP3902388	HIGH PRESSURE FUEL SUPPLY PUMP

HAYATANI MASAHIKO (JP)
USUI SATOSHI (JP)
MACHIMURA HIDEKI (JP)
KAWANO TATSUO (JP)
ARITOMI SYUNSUKE (JP)
TAMURA SHINGO (JP)

PCT/JP2012/080665

July 25, 2013

November 28, 2012

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HITACHI AUTOMOTIVE SYSTEMS LTD (JP)

F02M59/34; F02M51/00; F02M59/36; F02M59/46

JP2004218633A	2004-08-05
JP2010209907A	2010-09-24
JP2010156256A	2010-07-15
JP2010121595A	2010-06-03

INOUE Manabu et al. (JP)
Manabu Inoue (JP)

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