Invention Grant
- Patent Title: High-pressure pump
- Patent Title (中): 高压泵
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Application No.: US13933450Application Date: 2013-07-02
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Publication No.: US09534589B2Publication Date: 2017-01-03
- Inventor: Shinobu Oikawa , Hirokuni Tomita , Takehiko Kato
- Applicant: DENSO CORPORATION , NIPPON SOKEN, INC.
- Applicant Address: JP Kariya JP Nishio
- Assignee: DENSO CORPORATION,NIPPON SOKEN, INC.
- Current Assignee: DENSO CORPORATION,NIPPON SOKEN, INC.
- Current Assignee Address: JP Kariya JP Nishio
- Agency: Nixon & Vanderhye PC
- Priority: JP2012-150697 20120704; JP2013-063987 20130326
- Main IPC: F04B49/03
- IPC: F04B49/03 ; F04B7/00 ; F04B7/02 ; F16K31/06 ; F04B1/04 ; F04B53/10 ; F04B19/22

Abstract:
Between a movable core chamber and a fuel supply passage, a needle guide slidably supports a needle fixed to a movable core. The needle guide has a communication hole which fluidly connects the movable core chamber and the fuel supply passage. An opening sectional area of the communication hole is defined in such a manner that a fuel discharged amount decreases as an energization start time of a coil is delayed. In a suction stroke, it is restricted that the movable core and the needle bounce toward the fixed core after the needle biases a suction valve toward a stopper by means of a biasing force of a second spring. A relationship between the energization start time of the coil and the fuel discharged amount is properly maintained, so that the fuel discharged amount of the high-pressure pump can be controlled correctly.
Public/Granted literature
- US20140010687A1 HIGH-PRESSURE PUMP Public/Granted day:2014-01-09
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