CONTROL DEVICE OF DIESEL ENGINE

摘要

PROBLEM TO BE SOLVED: To reduce combustion noise and emission in a transitional operation state, in a control device of a diesel engine. SOLUTION: A variable valve train is controlled by calculating the target valve timing (Step 100). A deviation between the target valve timing and the actual valve timing and a variation in the actual valve timing are calculated (Step 102). The swirl ratio and the EGR ratio are estimated based on these values (Step 104). The fuel injection timing or a pilot injection quantity is corrected on the basis of its estimated swirl ratio and EGR ratio. When increasingly correcting the pilot injection quantity, operation is switched to an operation mode of injecting fuel from a small nozzle port. COPYRIGHT: (C)2008,JPO&INPIT