JPS6483856A - Ignition timing controller for internal combustion engine - Google Patents

Abstract

PURPOSE:To secure favorable torque build-up or the like by storing a maximum timing advance value and a stationary time compensation value at each area of learning areas, and setting a maximum timing advance value as a learning value immediately after an area movement and the stationary time compensation value at the time of knocking after the movement, respectively. CONSTITUTION:Means 1, 2 detect knocking, and a means 3 detects a cylinder internal maximum crank angle position. And, a means 4 calculates a compensation value of ignition timing on the basis of each deviation between each detecting signal of these means 2, 3 and respecitve desired values. A means 5 sets the compensation value and a learning value down to a feedback value, thereby performing knock-MBT (minimum advance for best torque) control. In these means aforesaid, the transition of a driving condition is judged by a means 8, and at the time of this judgment, the maximum timing advance compensation value stored in a means 6 is set as the feedback value by a device 9. Knocking after the transition is judged by a means 10, and at the time of this judgment, the stationary time compensation value stored in a means 7 is set as the feedback value by means 11.