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Title:
燃料噴射装置
Document Type and Number:
Japanese Patent JP6683143
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a fuel injection device capable of reducing variations of a needle moving amount and a fuel injection rate by controlling movement of the needle in stages.SOLUTION: In a fuel injection device 91, when a coil 80 produces magnetic field of a direction same as magnetic field of a magnet 350, first movable portion attraction force and solenoid valve attraction force are generated, and a solenoid valve 330 opens a first plate portion fuel flow channel 255. A second movable portion attraction force is generated, and a second movable portion 362 opens a second plate portion fuel flow channel 256. When the coil 80 produces magnetic field in an opposite direction, first movable portion repulsive force is generated, and the solenoid valve 330 closes the first plate portion fuel flow channel 255. The second movable portion 362 opens the second plate portion fuel flow channel 256. A needle 340 is moved in stages only by changing the direction of the magnetic field of the coil 80, and a position of the solenoid valve 330 is determined. Thus variations of a moving amount of the needle 340 can be reduced, and variations of a fuel injection rate can be reduced without being affected by variations of electric current.SELECTED DRAWING: Figure 17

Inventors:
内山 嘉穂
本江 勇介
Application Number:
JP2017008776A
Publication Date:
April 15, 2020
Filing Date:
January 20, 2017
Export Citation:
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Assignee:
株式会社デンソー
International Classes:
F02M45/08; F02M47/00; F02M47/02; F02M51/00; F02M51/06
Domestic Patent References:
JP10077922A
JP2004353651A
JP2006250122A
JP2001355533A
JP9217665A
JP2001227428A
JP2016142392A
Foreign References:
EP2392815A1
CN106050497A
DE102006061946A1
Attorney, Agent or Firm:
服部 雅紀