| 摘要 |
<p>In a situation where the compression end temperature becomes lower than the air-fuel mixture self-ignition temperature as the EGR rate is increased, the injection timing of pre-injection executed prior to main injection is shifted toward the angle of advance side. The amount of shift toward the angle of advance side is set such that the greater the EGR rate, the greater the amount of shift. Thereby, insufficiency of the amount of heat for preheating the inside of a cylinder at the main injection start timing is prevented, and successive combustion can be attained in which fuel injected in main injection immediately starts burning after fuel injection.</p> |
