Abstract: A controller of a control device of an internal combustion engine includes: a storage configured to store fuel pressure detected during injection of one port injection valve of port injection valves in association with another port injection valve, of the port injection valves, scheduled to inject fuel after one or two cycles of the fuel pressure pulsation elapsing from injection of the one port injection valve; and a calculator configured to calculate an energization period of the another port injection valve based on the stored fuel pressure.

Abstract: A controller of a control device of an internal combustion engine includes: a storage configured to store fuel pressure detected during injection of one port injection valve of port injection valves in association with another port injection valve, of the port injection valves, scheduled to inject fuel after one or two cycles of the fuel pressure pulsation elapsing from injection of the one port injection valve; and a calculator configured to calculate an energization period of the another port injection valve based on the stored fuel pressure.

Abstract: An engine control apparatus for controlling output torque of an engine includes a target determining unit for determining a target value of an injection quantity of fuel on the basis of pressure in a cylinder of the engine. The engine control apparatus further includes an injection control unit for controlling the injection quantity at the target value in a startup injection control period in starting of the engine. The startup injection control period is between a specific startup timing and an end timing where a specific condition is satisfied.

Abstract: An engine control apparatus for controlling output torque of an engine includes a target determining unit for determining a target value of an injection quantity of fuel on the basis of pressure in a cylinder of the engine. The engine control apparatus further includes an injection control unit for controlling the injection quantity at the target value in a startup injection control period in starting of the engine. The startup injection control period is between a specific startup timing and an end timing where a specific condition is satisfied.

Abstract: To provide an ignition timing controller of an internal combustion engine which prevents poor acceleration due to overcorrection for retard and the occurrence of knocking due to undercorrection for retard regardless of a change in the ratio of fuel injections, the internal combustion engine with an injector (11) for in-cylinder injection and an injector (12) for intake passage injection includes a transitional retard control section for correcting ignition timing for retard to prevent knocking during transitional operation of the engine, wherein a control amount by the transitional retard control section depends on a ratio of an amount of fuel injection from the injector (11) for in-cylinder injection to an amount of fuel injection from the injector (12) for intake passage injection.

Abstract: A knocking determining apparatus of an internal combustion engine that includes an in-cylinder injector and an intake port injector and that determines knocking based on an output signal of a knock sensor. The knocking determining apparatus includes a knocking determination prohibition unit prohibiting, when a ratio of fuel injection from the in-cylinder injector and the intake port injector is changed, knocking determination for a prescribed period after that change, or a knocking determination level change unit changing a knocking determination level for a prescribed period after that change.

Abstract: There is provided a device for supplying secondary air, which comprises a secondary air passage for supplying secondary air, to an exhaust passage of an engine, upstream of an exhaust purification device provided in the exhaust passage, a pump provided in the secondary air passage for supplying a secondary air, a battery used for driving the pump, at least one opening-closing device for opening and closing the secondary air passage, and a pressure sensor provided between the pump and the opening-closing device for detecting a pressure in the secondary air passage. A malfunction of at least one of the pump and the opening-closing device is detected on the basis of at least one of the pressures detected when the secondary air passage is opens and when the secondary air passage is closed.

Abstract: A reference injection quantity of fuel to be injected from a port injection valve and an in-cylinder injection valve as well as an injection ratio are determined based on an operation condition. A ratio between a feedback correction amount for port injection and a feedback correction amount for in-cylinder injection is set equal to a ratio of the reference injection quantity. If an injection quantity obtained as a result of addition of a correction amount is smaller than a minimum injection quantity of the injection valve, feedback correction is prohibited. Meanwhile, if the feedback correction amount is small, only the injection valve attaining a larger injection quantity is subjected to feedback correction.

Abstract: An internal combustion engine includes an in-cylinder injector injecting a fuel into a cylinder and an intake port injector injecting a fuel into an intake port. In the internal combustion engine, when a fuel injection ratio between the in-cylinder injector and the intake port injector is changed such that the ratio of fuel injection from the in-cylinder injector is increased, ignition timing is retard-corrected for a prescribed period after that change.

Abstract: A control apparatus of an internal combustion engine includes a fuel pressure sensor to detect the pressure of the fuel supplied from a fuel pump to an injector; an in-cylinder pressure sensor, which serves as a combustion chamber temperature detecting unit that detects the temperature in the combustion chamber or the parameter depending on the temperature, to detect in-cylinder pressure (combustion chamber pressure); and an ECU that controls to execute the first fuel injection of each cylinder by the injector when the fuel pressure detected by the fuel pressure sensor is not less than a predetermined threshold fuel pressure and when the in-cylinder pressure detected by the in-cylinder pressure sensor is not less than a threshold in-cylinder pressure.

Abstract: To provide an ignition timing controller of an internal combustion engine which prevents poor acceleration due to overcorrection for retard and the occurrence of knocking due to undercorrection for retard regardless of a change in the ratio of fuel injections, the internal combustion engine with an injector (11) for in-cylinder injection and an injector (12) for intake passage injection includes a transitional retard control section for correcting ignition timing for retard to prevent knocking during transitional operation of the engine, wherein a control amount by the transitional retard control section depends on a ratio of an amount of fuel injection from the injector (11) for in-cylinder injection to an amount of fuel injection from the injector (12) for intake passage injection.

Abstract: A control apparatus of an internal combustion engine includes a fuel pressure sensor to detect the pressure of the fuel supplied from a fuel pump to an injector; an in-cylinder pressure sensor, which serves as a combustion chamber temperature detecting unit that detects the temperature in the combustion chamber or the parameter depending on the temperature, to detect in-cylinder pressure (combustion chamber pressure); and an ECU that controls to execute the first fuel injection of each cylinder by the injector when the fuel pressure detected by the fuel pressure sensor is not less than a predetermined threshold fuel pressure and when the in-cylinder pressure detected by the in-cylinder pressure sensor is not less than a threshold in-cylinder pressure.

Abstract: There is provided a device for supplying secondary air, which comprises a secondary air passage for supplying secondary air, to an exhaust passage of an engine, upstream of an exhaust purification device provided in the exhaust passage, a pump provided in the secondary air passage for supplying a secondary air, a battery used for driving the pump, at least one opening-closing device for opening and closing the secondary air passage, and a pressure sensor provided between the pump and the opening-closing device for detecting a pressure in the secondary air passage. A malfunction of at least one of the pump and the opening-closing device is detected on the basis of at least one of the pressures detected when the secondary air passage is opens and when the secondary air passage is closed.

Abstract: A reference injection quantity of fuel to be injected from a port injection valve and an in-cylinder injection valve as well as an injection ratio are determined based on an operation condition. A ratio between a feedback correction amount for port injection and a feedback correction amount for in-cylinder injection is set equal to a ratio of the reference injection quantity. If an injection quantity obtained as a result of addition of a correction amount is smaller than a minimum injection quantity of the injection valve, feedback correction is prohibited. Meanwhile, if the feedback correction amount is small, only the injection valve attaining a larger injection quantity is subjected to feedback correction.

Abstract: An internal combustion engine includes an in-cylinder injector injecting a fuel into a cylinder and an intake port injector injecting a fuel into an intake port. In the internal combustion engine, when a fuel injection ratio between the in-cylinder injector and the intake port injector is changed such that the ratio of fuel injection from the in-cylinder injector is increased, ignition timing is retard-corrected for a prescribed period after that change.

Abstract: A knocking determining apparatus of an internal combustion engine that includes an in-cylinder injector and an intake port injector and that determines knocking based on an output signal of a knock sensor. The knocking determining apparatus includes a knocking determination prohibition unit prohibiting, when a ratio of fuel injection from the in-cylinder injector and the intake port injector is changed, knocking determination for a prescribed period after that change, or a knocking determination level change unit changing a knocking determination level for a prescribed period after that change.

Abstract: A fuel vapor feed controlling apparatus of a lean burn internal combustion engine suppresses either one of a rich misfire or a surge when fuel vapor is fed into the engine. A purge controlling unit controls an amount of fuel vapor fed from a fuel reservoir to the engine in response to an operational condition of the engine. A first compensation unit compensates the amount of fuel vapor such that an engine revolution speed of the engine may be identical with a target revolution speed. The purge controlling unit performs a purge control based on a compensation value compensated by the first compensation unit.

Abstract: A fuel vapor feed controlling apparatus of a lean burn internal combustion engine suppresses either one of a rich misfire or a surge when fuel vapor is fed into the engine. A purge controlling unit controls an amount of fuel vapor fed from a fuel reservoir to the engine in response to an operational condition of the engine. A first compensation unit compensates the amount of fuel vapor such that an engine revolution speed of the engine may be identical with a target revolution speed. The purge controlling unit performs a purge control based on a compensation value compensated by the first compensation unit.

Abstract: An internal combustion engine control system retards a fuel ignition time based on a deviation in the intake air quantity from a predetermined target intake air quantity which is necessary to keep an internal combustion engine idling at a predetermined idle speed. The fuel ignition time is retarded when a transmission is shifted into a neutral range so as to cause a quantity of intake air to converge with the predetermined target quantity of intake air. An engine speed of the internal combustion engine thereby converges with the predetermined idle speed.