| 摘要 |
PURPOSE:To stabilize the rotation of an engine when the load thereon is low, by increasing the skipped quantity of a feedback compensation coefficient depending on a deposited quantity on an intake valve when the ratio of fuel to air ischanged from a low value to a high value and vice versa. CONSTITUTION:When it is judgediin a step 101 that the ratio of fuel to air is low, a step 102 is taken so that a skipped quantity RS1 and a skip compensation quantity RS2 are added to a feedback compensation coefficient FAF. If it is judged in a step 105 that the ratio of fuel to air is not low, a step 107 is taken so that the skip compensation quantity RS2 is added to the feedback compensation coefficient FAF. The skip compensation quantity RS2 is altered depending on a deposited quantity W to prevent the fluctuation in the rotation of an engine from becoming large in idling. The rotation of the engine under low load is thusstbilized.
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