Title:
FUEL INJECTION CONTROL DEVICE FOR ENGINE
Document Type and Number:
Japanese Patent JP2021021338
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. The fuel injection part executes first fuel injection and second fuel injection sequentially in an intake stroke. When the engine is subjected to high load, the control unit increases a ratio of a fuel injection amount in the second fuel injection to the total required fuel amount per cycle more than that when the engine is subjected to low load.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:
JP2019136438A
Publication Date:
February 18, 2021
Filing Date:
July 24, 2019
Export Citation:
Assignee:
MAZDA MOTOR
International Classes:
F02D41/34; F02B3/02; F02B17/00; F02B23/10; F02B31/06; F02D41/02; F02D43/00; F02D45/00; F02M61/18
Attorney, Agent or Firm:
Maeda patent office