| 摘要 |
PROBLEM TO BE SOLVED: To attempt the stable running of an engine and the improvement of exhaust gas performance by controlling pilot injection quantity so that heat generation amount accompanied with the pilot injection which is calculated based on the pressure in a combustion chamber can agree with aimed heat generation amount. SOLUTION: The heat generation amount Iq to be generated in accordance with pilot injection into a combustion chamber by an injector is calculated as an integration value of heat generation rate q with positive value in calculation period fromθs toθe in crank angle. Based on the deviation between the integration value Iq of calculated pilot heat generation rate and the integration value of the aimed pilot heat generation rate which is determined previously in accordance with the running conditions of the engine, the pulse width PWp of driving pulse for pilot injection is corrected to eliminate the deviation. Hence, the combustion of injected fuel by the pilot injection can be performed well, engine noise can be controlled and exhaust gas performance can be improved. |
