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1. (WO2017038394) FUEL INJECTION DEVICE

Pub. No.:    WO/2017/038394    International Application No.:    PCT/JP2016/073260
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Tue Aug 09 01:59:59 CEST 2016
IPC: F02M 61/18
F02M 47/00
F02M 51/06
F02M 61/10
Applicants: DENSO CORPORATION
株式会社デンソー
Inventors: HORIBE Munehisa
堀部 宗尚
SUZUKI Masayuki
鈴木 雅幸
Title: FUEL INJECTION DEVICE
Abstract:
This invention provides a fuel injection device comprising a nozzle body (4), an outer needle (6), an inner needle (7), actuators (8, 9), and a control unit (2), fuel injection being started and stopped by the tip of the outer needle being unseated from and seated on an inner wall (13) of the nozzle body; wherein the control unit selectively uses a first mode and a second mode in accordance with the state of the inner needle when the outer needle is unseated from the inner wall of the nozzle body and fuel is injected, the inner needle is moved from the lowest point of the movement range of the inner needle toward an axial-direction end in the first mode, the inner needle remains at the lowest point in the second mode, the control unit selectively uses the first mode and the second mode depending on the operating status of the engine including at least a command value for the fuel injection amount, and the command value for the injection amount is greater when the second mode is used than when the first mode is used.