Title:
FUEL INJECTION CONTROL DEVICE FOR ENGINE
Document Type and Number:
Japanese Patent JP2021021337
Kind Code:
A
Abstract:
To reduce an amount of NOx emission.SOLUTION: A fuel injection control device for an engine 1 includes a swirl generating part (swirl control valve 56), a fuel injection part with multi-injection holes (injector 6), an ignition part (ignition plug 25) and a control unit (ECU10). The fuel injection part forms a mixture that is leaner than a theoretical air fuel ratio, part of the mixture starts combustion accompanied by flame propagation with the ignition by the ignition part and the rest unburned mixture burns with self-ignition. A swirl flow causes first fuel spray discharged from a first injection hole of the fuel injection part and second fuel spray discharged from a second injection hole to retreat from each other, while the swirl flow causes third fuel spray discharged from a third injection hole and fourth fuel spray discharged from a fourth injection hole to come close to each other, thereby forming, in the combustion chamber, a first region and a second region of which mixture is richer than the mixture of first region. The fuel injection part executes first fuel injection, second fuel injection and third fuel injection sequentially with fuel injection intervals therebetween in an intake stroke.SELECTED DRAWING: Figure 10
Inventors:
OURA TAKUYA
NISHIDA TOMOHIRO
KONO MICHIHARU
HONDA YUYA
TANII TOTA
NISHIDA TOMOHIRO
KONO MICHIHARU
HONDA YUYA
TANII TOTA
Application Number:
JP2019136437A
Publication Date:
February 18, 2021
Filing Date:
July 24, 2019
Export Citation:
Assignee:
MAZDA MOTOR
International Classes:
F02D41/40; F02B3/02; F02B17/00; F02B23/10; F02B31/06; F02D41/02; F02D43/00; F02D45/00; F02M61/18
Attorney, Agent or Firm:
Maeda patent office