| 摘要 |
PURPOSE: A method for controlling the ignition timing of an engine is provided to restrain the sudden increase of engine torque in acceleration driving, thereby improving drivability and fuel efficiency. CONSTITUTION: A method for controlling the ignition timing of an engine includes the following steps: an injection pattern checking step(S10) of checking fuel injection patterns which are a single injection and a split injection inside the engine; an injection pattern determining step(S20) of determining the fuel injection pattern checked in the step(S10); an ignition timing initializing step(S30) of initializing a compensation value for the ignition timing when the fuel injection pattern is determined to be the split injection in the step(S20); an ignition timing calculating step(S40) of calculating the ignition timing at the completion of the single injection and the present ignition timing; and an ignition timing comparing step(S50) of comparing the present ignition timing with the optimal ignition timing of a present driving condition. [Reference numerals] (AA) Start; (BB) End; (S10) Check single injection and split injection inside an engine; (S20) Split injection?; (S30) Initialize an ignition timing compensation value; (S40) Calculate an ignition timing at the completion of the single injection and present ignition timing; (S50) Present ignition timing>optimum ignition timing of a present driving condition; (S51) Set up a ignition timing compensation target value; (S52) Reach the ignition timing compensation target value? |
