| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an engine control method and an engine control device which can suppress the occurrence of pre-ignition while keeping the warming-up performance in cold and reducing the NO<SB POS="POST">x</SB>in diesel particulate filter regeneration when an exhaust valve is opened and main injection, pilot injection and post injection are carried out in an intake process. <P>SOLUTION: In a first operation condition, the exhaust valve is opened and the main injection and the pilot injection and the post injection by which a prescribed quantity of fuel is jetted are carried out in the intake process. In the pilot injection, the prescribed quantity of the injection is reduced on the basis of the quantity of non-combustion fuel in a cylinder. In a second operation condition, the exhaust valve is opened and the main injection and the pilot injection are carried out at the same time in the intake process and the pilot injection is carried out in the prescribed quantity of the injection as it is. <P>COPYRIGHT: (C)2012,JPO&INPIT |
