FIELD: mechanical engineering.
SUBSTANCE: invention relates to methods of control of multicylinder internal combustion engines. Invention provides possibility of improvement of method of matching of torques developed by pistons in separate cylinders at small and at considerable duration of injection and at operation of engine both under first and second conditions. Proposed method of control of operation of multicylinder internal combustion engine, mainly, internal combustion engines with direct injection of fuel, comes to injection of fuel into combustion chamber of said engine through valve nozzle at compression stroke under first operating conditions and at intake stroke under second operating conditions. Change-over between said operating conditions is provided and torques developed by pistons in separate cylinders of internal combustion engine are relatively matched. Matching of torques developed by pistons in separate cylinders is provided under first operating conditions by means of governor. Values of correction factors (r_ik) required for correction of mismatching of torques (M_f_ik) developed by pistons in separate cylinders (i) are determined in several operating points (k) and preserved, and basing on these injection parameters correction factors (r_ik), values of static mismatch (q_stat) and dynamic mismatch (q_dyn) of fuel flow rate through valve nozzle are found. Basing on obtained mismatch values (q_stat, q_dyn) of fuel flow rate through valve nozzle, amount of fuel injected into combustion chamber is corrected. Control unit for internal combustion engine, first of all, for internal combustion engine with direct injection of fuel, has combustion chamber into which fuel can be injected through valve nozzle, and regulator providing at least under first operating conditions, matching of torque developed by pistons in separate cylinders. Control unit provides change-over of indicated operating conditions.
EFFECT: improved matching of torque developed by pistons in separate cylinders.
10 cl, 3 dwg
