| 摘要 |
PROBLEM TO BE SOLVED: To provide a control device for an internal combustion engine having a cylinder pressure sensor capable of calculating torque fluctuation highly precisely with a simple technique.SOLUTION: The control device obtains a crank angle θof an insulation process before start of combustion and a crank angle θof an insulation process after finish of combustion for sensing the cylinder internal pressures Pand Pof each crank angle (S100). The cylinder internal volume Vat the crank angle θ, the cylinder internal volume Vat the crank angle θ, the heating value Q(=α(PV-PV)) in the section with the crank angles θto θare calculated, and the internal energy U(=β(PV-PV)) in the section with the crank angles θto θare calculated, respectively for calculating the section illustrated torque TQ(=Q-U) (S102). Based on the section illustrated torque TQ, illustrated torque fluctuation ZTF (=STD(BPF(TQ))) is calculated (S104). |
