Method for running-smoothness control of internal combustion engine, involves detecting cylinder internal pressure in each cylinder of internal combustion engine during working cycle of cylinder

摘要

The method involves detecting cylinder internal pressure (p-i1) in each cylinder of internal combustion engine during a working cycle of the cylinder (Z-i), before a piston reaches a top dead center in the cylinder. Another cylinder internal pressure (p-i2) is detected after the piston reaches the top dead center. A pressure difference is formed for each cylinder by subtracting the former cylinder internal pressure from the latter cylinder internal pressure. Controlled variables (r-i) of a control circuit are formed from the pressure differences for adjusting the fuel injection amount.