Abstract: The control device controls an internal combustion engine comprising a fuel injector 31. The control device comprises an injection control part controlling fuel injection from the fuel injector. The injection control part controls the fuel injections so as to perform a plurality of pre-injections and a main injection and so that the pre-injected fuel is burned by compression self-ignition after the start of main injection. The injection control part controls the fuel injector so as to perform the pre-injections and main injection at basic injection timings during steady operation, and performs correction control so as to correct the injection timings from the basic injection timings during transient operation. In correction control, the larger a crank angle from TDC of the injection timings of the different injections before correction, the greater the amounts of correction of the injection timings of the injections.

Abstract: The control device controls an internal combustion engine comprising a fuel injector 31. The control device comprises an injection control part controlling fuel injection from the fuel injector. The injection control part controls the fuel injections so as to perform a plurality of pre-injections and a main injection and so that the pre-injected fuel is burned by compression self-ignition after the start of main injection. The injection control part controls the fuel injector so as to perform the pre-injections and main injection at basic injection timings during steady operation, and performs correction control so as to correct the injection timings from the basic injection timings during transient operation. In correction control, the larger a crank angle from TDC of the injection timings of the different injections before correction, the greater the amounts of correction of the injection timings of the injections.

Abstract: An object of the present invention is to recover the performance of an exhaust gas purification apparatus while suppressing slipping of fuel through the exhaust gas purification apparatus. When the performance of the exhaust gas purification apparatus is to be recovered at a time when the intake air quantity of the internal combustion engine is increasing (S101, S103), an upper limit value is set for the quantity of fuel added through a fuel addition valve provided in the exhaust passage (S104). If a target fuel supply quantity to be supplied to the exhaust gas purification apparatus is larger than the upper limit value (S105), a quantity of fuel quantity equal to the upper limit value is added through the fuel addition valve, and the shortfall of fuel supply is injected by sub fuel injection in the internal combustion engine (S110, S111, S112).

Abstract: An object of the present invention is to recover the performance of an exhaust gas purification apparatus while suppressing slipping of fuel through the exhaust gas purification apparatus. When the performance of the exhaust gas purification apparatus is to be recovered at a time when the intake air quantity of the internal combustion engine is increasing (S101, S103), an upper limit value is set for the quantity of fuel added through a fuel addition valve provided in the exhaust passage (S104). If a target fuel supply quantity to be supplied to the exhaust gas purification apparatus is larger than the upper limit value (S105), a quantity of fuel quantity equal to the upper limit value is added through the fuel addition valve, and the shortfall of fuel supply is injected by sub fuel injection in the internal combustion engine (S110, S111, S112).

Abstract: Removal of fine particles by oxidation or/and sulfur poisoning recovery control may be required when an internal combustion engine has been in an extremely low load state for a predetermined period or more. In this case, the engine speed of the internal combustion engine (1) is adjusted to a range where the temperature of a filter (20) can be raised by heat-up control. The heat-up control is then executed by a filter temperature control means to raise the temperature of the filter (20) to a predetermined value. When the filter (20) reaches the predetermined temperature by means of low-temperature combustion, post-injection, VIGOM-injection, addition of 10 fuel to an exhaust system and the like, removal of fine particles by oxidation or/and sulfur poisoning recovery control for eliminating sulfur poisoning of a NOx absorbent are conducted.

Abstract: Removal of fine particles by oxidation or/and sulfur poisoning recovery control may be required when an internal combustion engine has been in an extremely low load state for a predetermined period or more. In this case, the engine speed of the internal combustion engine (1) is adjusted to a range where the temperature of a filter (20) can be raised by heat-up control. The heat-up control is then executed by a filter temperature control means to raise the temperature of the filter (20) to a predetermined value. When the filter (20) reaches the predetermined temperature by means of low-temperature combustion, post-injection, VIGOM-injection, addition of 10 fuel to an exhaust system and the like, removal of fine particles by oxidation or/and sulfur poisoning recovery control for eliminating sulfur poisoning of a NOx absorbent are conducted.