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Title:
AUXILIARY CHAMBER TYPE DIESEL ENGINE
Document Type and Number:
WIPO Patent Application WO/2020/105350
Kind Code:
A1
Abstract:
Provided is an auxiliary chamber type diesel engine which can reduce emissions of smoke and unburned hydrocarbons in accordance with a wide range of operation states. The present invention comprises: an injector (20) which injects fuel into an auxiliary combustion chamber (10) during an arbitrary injection period, and is electrically driven; a fuel passage pipe (30) which is connected to a fuel inlet of the injector (20); a fuel pump (40) which supplies the fuel to the fuel passage pipe (30); a means (51) for detecting fuel pressure in the fuel passage pipe (30); an engine operation state detection means which detects an engine operation state; and a control means (50), wherein said control means (50) calculates a target fuel pressure for the fuel passage pipe (30) on the basis of the engine operation state detected by the engine operation state detection means, then adjusts the pressure within the fuel passage pipe (30) to the target fuel pressure by means of controlling the amount of fuel supplied to the fuel passage pipe (30) from the fuel pump (40), and injects the fuel from the injector (20) into the auxiliary combustion chamber (10) during a desired injection period.

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Inventors:
ASAI GO (JP)
MORITA GIN (JP)
MATSUKI KAZUYA (JP)
Application Number:
PCT/JP2019/041618
Publication Date:
May 28, 2020
Filing Date:
October 24, 2019
Export Citation:
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Assignee:
YANMAR CO LTD (JP)
International Classes:
F02D41/04; F02D41/06; F02D41/10; F02D41/38; F02D45/00; F02M37/00; F02M55/02
Foreign References:
JPH0633815A1994-02-08
JP2018040255A2018-03-15
JP2008075470A2008-04-03
JP2008267216A2008-11-06
JPH10288108A1998-10-27
JP2000205014A2000-07-25
JPH09217624A1997-08-19
JPH09158730A1997-06-17
Attorney, Agent or Firm:
ONO, Hisazumi et al. (JP)
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