Invention Application

  • Patent Title: FUEL INJECTION VALVE
  • Application No.: US15509323
    Application Date: 2015-09-14
  • Publication No.: US20170254304A1
    Publication Date: 2017-09-07
  • Inventor: Shinsuke YAMAMOTOShinobu OIKAWA
  • Applicant: DENSO CORPORATION
  • Priority: JP2014-188846 20140917
  • International Application: PCT/JP2015/004678 WO 20150914
  • Main IPC: F02M51/06
  • IPC: F02M51/06
FUEL INJECTION VALVE
Abstract:
In a fuel injection valve, when a regulating unit provided in a needle abuts against a movable core, a gap is defined between a flange portion end face of a flange portion and a movable core first end face of the movable core. With the above configuration, when a coil develops a magnetic field, because the movable core abuts against a flange portion while accelerating in a valve-opening direction, a relatively large force is exerted on the needle in the valve-opening direction. The needle is further moved in the valve-opening direction by an urging force of a second spring after the movable core has abutted against the fixed core. With the above configuration, a lift quantity of the needle is longer than a distance by which the movable core moves until the movable core abuts against a fixed core abutting portion since the movable core abuts against the flange portion. As a result, the lift quantity of the needle can be increased without any increase in the electric power to be supplied to the coil.
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