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Title:
FUEL INJECTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/037713
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 (38) and a second valve body (37) and switches the flow path area of the outflow flow path; a drive unit (33) that controls the amount of lift of the first valve body to a first lift amount or a second lift amount; and a third valve body (35) that has switching chambers (44, 45) and a communication path (57) formed therein and opens and closes the communication path in accordance with the lift amount for the first valve body. The switching valve mechanism restricts to a first throttle state when the first valve body is not lifting and restricts to a second throttle state when the first valve body is positioned at the second lift amount. The third valve body separates from the first valve body and opens the communication path when the first valve body is not lifting and comes in contact with the first valve body and blocks the communication path when the first valve body is at the first lift amount position or the second lift amount position.

Inventors:
TODA Naoki (C/O SOKEN, INC. 14, Iwaya, Shimohasumi-ch, Nishio-city Aichi 12, 〒4450012, JP)
HIJIMA Toshiaki (C/O SOKEN, INC. 14, Iwaya, Shimohasumi-ch, Nishio-city Aichi 12, 〒4450012, JP)
FUJINO Tomoki (C/O DENSO CORPORATION, 1-1 Showa-ch, Kariya-city Aichi 61, 〒4488661, JP)
Application Number:
JP2017/023908
Publication Date:
March 01, 2018
Filing Date:
June 29, 2017
Export Citation:
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Assignee:
DENSO CORPORATION (1-1 Showa-cho, Kariya-city Aichi, 61, 〒4488661, JP)
International Classes:
F02M47/00; F02M51/00; F02M51/06
Foreign References:
JP2008309015A2008-12-25
JP2004204813A2004-07-22
US6471142B12002-10-29
Attorney, Agent or Firm:
JIN Shunji (6th Floor, Takisada Bldg. 2-13-19, Nishiki, Naka-k, Nagoya-city Aichi 03, 〒4600003, JP)
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