FIRING TIMING CONTROLLER FOR ENGINE

摘要

PURPOSE:To prevent the lowering of the output and the damage of engine due to the lowering of the combustion efficiency, by delaying the firing timing when the suction temperature reaches to the high temperature region higher than the predetermined level where the combustion speed is abnormally high. CONSTITUTION:The firing timing of the firing plug 12 is corrected through a correction circuit 16 in accordance to the suction temperature on the basis of the basic firing timing to be determined by the engine load by means of a basic firing timing determination circuit 15 in a firing timing controller 13. Through said correction the firing timing will lead as the temperature rise when the suction temperature is below the predetermined level to improve the combustionability but in the high temperature region higher than the predetermined level T where the combustion speed will be abnormally high the firing timing will be lagged gradually as the temperature rise. In such a manner the required firing timing of engine and the actual firing timing can be prevented from shifting.