ENGINE AND METHOD FOR CONTROLLING THE SAME

摘要

PROBLEM TO BE SOLVED: To compatibly manage suppression of deterioration of drivability and air fuel ratio control of an engine provided with a plurality of cylinders. SOLUTION: Torque slippage corresponding to rotation slippage from rotation speed peak average value (npave) of each cylinder #1-#4 and torque slippage corresponding to slippage of exhaust gas air fuel ratio from stoichiometric air fuel ratio (aftgt) are calculated for each cylinder #1-#4, and intake air correction values (qacor) #1-#4 for correcting both of torque slippage are calculated for each cylinder. Target intake air quantity (qatgt) #1-#4 and target fuel injection quantity (qftg) #1-#4 are calculated with intake air quantity correction coefficient ka#1-#4 and fuel injection quantity correction coefficient kf #1-#4 reflecting intake air correction quantity (qacor) #1-#4 are calculated and an electromagnetic valve drive mechanism 200 and fuel injection valves 100 are controlled for every cylinder to achieve the target intake air quantity (qaftgt) #1-#4 and target fuel injection quantity (qftg) #1-#4. COPYRIGHT: (C)2006,JPO&NCIPI