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Title:
FUEL INJECTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/037714
Kind Code:
A1
Abstract:
A fuel injection device including: a valve body (31) having formed therein an injection hole (30), a supply flow path (40), a pressure control chamber (43), and an outflow flow path (42); a valve member (32) that opens and closes the injection hole; a switching valve mechanism (36) that has a first valve body (35, 352), a second valve body (37), and a third valve body (38, 382) and switches the flow path area of the outflow flow path; and a drive unit (33) that switch controls the lift amount of the first valve body to a first lift amount or a second lift amount. A switching chamber communicates with the pressure control chamber. Insertion holes (37e, 38e) being part of the outflow flow path are formed in the second valve body and the third valve body, respectively. The switching valve mechanism restricts the outflow flow path to a first throttle state if the first valve body is at a first lift amount position and restricts the outflow flow path to a second throttle state having a flow path area different from the first throttle state if the first valve body is at the second lift amount position.

Inventors:
TODA NAOKI (JP)
HIJIMA TOSHIAKI (JP)
FUJINO TOMOKI (JP)
Application Number:
PCT/JP2017/023909
Publication Date:
March 01, 2018
Filing Date:
June 29, 2017
Export Citation:
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Assignee:
DENSO CORP (JP)
International Classes:
F02M47/00; F02M51/00; F02M51/06
Foreign References:
JP2006274841A2006-10-12
JP2008309015A2008-12-25
JP2004204813A2004-07-22
US6471142B12002-10-29
Attorney, Agent or Firm:
JIN Shunji (JP)
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