A fuel injection control device of a direct-injection engine

Japanese Patent JP6102958

B2

PROBLEM TO BE SOLVED: To surely form an air-fuel mixture layer and a heat insulating gas layer in a combustion chamber, in a direct-injection engine.SOLUTION: A fuel injection valve 6 is constituted so that the more a lift amount of an outer opening valve 62 is, the narrower a taper angle of a follow cone is. A fuel injection control portion injects fuel at a prescribed injection timing when a required injection amount is smaller than a first required amount, implements a first injection for injecting the fuel at a timing advanced with respect to the prescribed injection timing, with a prescribed first lift amount, and then implements a second injection for injecting the fuel with a second lift amount smaller than the first lift amount after the first injection, when the required injection amount is the first required amount or more and smaller than a second required amount, and implements the first injection and the second injection, and then implements a third injection with a third lift amount smaller than the second lift amount for an injection period shorter than those in the first and second injections, after the second injection, when the required injection amount is the second required amount or more.SELECTED DRAWING: Figure 6

Takeshi Nagasawa
Nobuyuki Ota
Kenshi Uchida
Ryohei Ohno
Kei Sato
Eiji Fujimoto

JP2015010854A

March 29, 2017

January 23, 2015

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Mazda Corporation Inc

F02D41/32; F02D41/02; F02D41/04; F02M45/00; F02M45/08; F02M51/00; F02M61/08; F02M61/10

JP2003286879A
JP2011132849A
JP2014088773A
JP2000027652A
JP2003065133A
JP6336932A
JP2008208813A
JP2013068148A
JP2005194896A
JP10054323A
JP62075025A
JP62070645A
JP2005002967A

WO2013015023A1

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