Abstract: An object of this invention is, with respect to a torque-demand-control type controller that subjects two kinds of actuators provided upstream and downstream in an intake passage to coordinated operations based on a requested torque for an internal combustion engine, to enable realization of a pulse-like torque change in a torque decreasing direction that is requested, for example, when performing an upshift operation in an electronically controlled automatic transmission. To achieve this object, according to a controller for an internal combustion engine of this invention, when a pulse component in a torque decreasing direction is included in a requested torque, a second requested torque that does not include the pulse component is generated. In this case, a first actuator provided on the downstream side in the intake passage is operated based on the requested torque.

Abstract: In a control of an internal combustion engine control apparatus, the control apparatus includes: a fuel tank that stores a fuel; a vaporized fuel tank that is connected to an intermediate portion of an intake passageway of an internal combustion engine and that stores a vaporized fuel that is formed by vaporization of the fuel; an in-tank fuel supply device that supplies the fuel from the fuel tank into the vaporized fuel tank; and a normally-closed vaporized fuel supply valve that opens and closes a connecting portion between the vaporized fuel tank and the intake passageway. The control apparatus estimates air/fuel ratio in the vaporized fuel tank, and produces the vaporized fuel in the vaporized fuel tank by driving the in-tank fuel supply device, with the vaporized fuel supply valve closed, until the estimated air/fuel ratio becomes substantially zero, during operation of the engine.

Abstract: An engine includes a normal fuel tank, fuel gas tank, an in-tank injection valve and a fuel gas supply valve. During operation of the engine, in a state where the fuel gas supply valve is closed, a fuel is injected into the fuel gas tank through the in-tank injection valve to generate a fuel gas by vaporizing the fuel. The fuel gas is stored in the fuel gas tank and is maintained in the gas phase due to the natural decompression even after the engine is stopped. To start the engine, the fuel gas supply valve is opened to supply the fuel gas in the fuel gas tank to a surge tank. Thus, compared with the case where the fuel gas is generated at the start of the engine, the fuel gas can be quickly supplied into the cylinder, so that the ability to start the engine is improved.

Abstract: When a change amount of any one of a demanded torque, a demanded efficiency, and a demanded air-fuel ratio exceeds a predetermined threshold value, an internal combustion engine control apparatus provided by this invention makes a temporary adjustment to a value of any one of a demanded torque, a demanded efficiency and instructed efficiency, and a demanded air-fuel ratio in accordance with a type of demanded engine performance that is currently being given priority among various performances demanded of the internal combustion engine. In the present control apparatus, an actuator for air amount control is operated in accordance with a target air amount calculated based on a demanded torque and a demanded efficiency, an actuator for ignition timing control is operated in accordance with an instructed efficiency, and an actuator for fuel injection amount control is operated in accordance with a demanded air-fuel ratio.

Abstract: An internal combustion engine control device the present invention provides is a control device that can realize both of request torque and a request A/F for each of cylinder groups with high precision, even when the request A/F differs at each of the cylinder groups. The present control device sets a reference A/F within a range from the leanest A/F to the richest A/F out of the request A/Fs to the respective cylinder groups. The present control device calculates a target air quantity for realizing the request torque under the reference A/F, based on data that defines a relation between engine output torque and an air quantity in relation to an A/F. The present control device controls a throttle opening in accordance with the target air quantity, and controls fuel injection amounts of the respective cylinders in accordance with the request A/F s to the respective cylinder groups.

Abstract: According to the present invention, torque controllability may be improved in a situation in which there is a gap between a required torque and a current torque based on a supercharge delay of a supercharger when calculation of a target throttle divergence using an air reverse model is applied to a supercharged internal combustion engine. Although the control unit of the present invention usually determines the required torque as a target torque, the control unit determines a value lower than the current torque when a reduction direction change occurs in the required torque while there is the gap between the required torque and the current torque. Desirably, the control unit determines a target torque reduction correspondingly to a decrease in the required torque, and determines a target torque reduction subtracted from the current torque as the target torque.

Abstract: An object of the present invention is to enable a requested efficiency by cylinder group that is requested from a viewpoint of exhaust gas performance to be realized precisely when an internal combustion engine having a single throttle shared by a plurality of cylinder groups, and having an exhaust gas purifying catalyst for each of the cylinder groups is operated at a different air-fuel ratio at each of the cylinder groups. To this end, a control device for the internal combustion engine provided by the present invention calculates an efficiency ratio of a representative efficiency determined based on the requested efficiency by cylinder group and a requested efficiency by cylinder group, and calculates a requested torque by cylinder group by dividing a requested torque by the efficiency ratio for each of the cylinder groups.

Abstract: A control device for an internal combustion engine provided by the present invention is a control device which can satisfy both a requirement relating to exhaust gas performance of the internal combustion engine and a requirement relating to operation performance by properly regulating a change speed of a required air-fuel ratio, in the internal combustion engine which uses torque and an air-fuel ratio as control variables. The control device receives the requirement relating to the exhaust gas performance of the internal combustion engine, and calculates an air-fuel ratio which satisfies the requirement as a required air-fuel ratio. When a predetermined reduction condition is not satisfied, an original required air-fuel ratio is directly determined as a final required air-fuel ratio.

Abstract: An object of the present invention is to control a supercharge pressure in such a manner as not to interfere with warming-up of an exhaust gas purifying catalyst, in an internal combustion engine with a turbo supercharger. To this end, a control device for an internal combustion engine with a turbo supercharger provided by the present invention makes a determined value of a target supercharge pressure with respect to a same target intake pressure smaller when a request to warm up the exhaust gas purifying catalyst is present, as compared with when the request is absent. Note that the target intake pressure is determined based on a target air amount determined from a requested torque for the internal combustion engine. The present control device operates a throttle based on the target intake pressure and an actual supercharge pressure, and operates a wastegate valve based on the target supercharge pressure.

Abstract: A control apparatus for a supercharged internal combustion engine, which can achieve a target torque accurately even if the target torque contains a high-frequency vibration component. The control apparatus determines a target air quantity and a target boost pressure from a target torque, operates an actuator for air quantity control according to the target air quantity, and operates an actuator for boost pressure control according to the target boost pressure. The target torque is formed to contain a low-frequency torque component that is set at all times based on a torque requirement from a driver and a high-frequency torque component that is set as necessary for a specific type of vehicle control. When the target torque contains only the low-frequency torque component, the target boost pressure is formed using a pressure component corresponding to the low-frequency torque.

Abstract: A control device for an internal combustion engine provided by the present invention is a control device which can satisfy a requirement concerning exhaust gas performance of the internal combustion engine, a requirement concerning fuel economy performance, and a requirement concerning operation performance with an excellent balance by properly regulating a change speed of a required air-fuel ratio and an ignition timing. The present control device keeps the ignition timing at an optimal ignition timing if a predetermined permission condition is not satisfied. However, when the permission condition is satisfied, the present control device controls the ignition timing so as to compensate for a difference which occurs between torque which is estimated from an operation of an actuator for air quantity control and required torque by the ignition timing.

Abstract: When a change amount of any one of a demanded torque, a demanded efficiency, and a demanded air-fuel ratio exceeds a predetermined threshold value, an internal combustion engine control apparatus provided by this invention makes a temporary adjustment to a value of any one of a demanded torque, a demanded efficiency and instructed efficiency, and a demanded air-fuel ratio in accordance with a type of demanded engine performance that is currently being given priority among various performances demanded of the internal combustion engine. In the present control apparatus, an actuator for air amount control is operated in accordance with a target air amount calculated based on a demanded torque and a demanded efficiency, an actuator for ignition timing control is operated in accordance with an instructed efficiency, and an actuator for fuel injection amount control is operated in accordance with a demanded air-fuel ratio.

Abstract: A control device is provided that generates a target air-fuel ratio by lessening a change speed of a required air-fuel ratio of an internal combustion engine. However, when a deterioration degree of a catalyst which is disposed in an exhaust passage of the internal combustion engine is a predetermined reference or more, lessening of the change speed of the required air-fuel ratio is stopped, or a lessening degree of the change speed of the required air-fuel ratio is decreased. The control device calculates a target air quantity for realizing the required torque under the target air-fuel ratio. For calculation of the target air quantity, data in which relationship of torque generated by the internal combustion engine and an air quantity taken into a cylinder is fixed by being related to an air-fuel ratio can be used.

Abstract: A control device is provided that generates a target air-fuel ratio by lessening a change speed of a required air-fuel ratio of an internal combustion engine. However, when a deterioration degree of a catalyst which is disposed in an exhaust passage of the internal combustion engine is a predetermined reference or more, lessening of the change speed of the required air-fuel ratio is stopped, or a lessening degree of the change speed of the required air-fuel ratio is decreased. The control device calculates a target air quantity for realizing the required torque under the target air-fuel ratio. For calculation of the target air quantity, data in which relationship of torque generated by the internal combustion engine and an air quantity taken into a cylinder is fixed by being related to an air-fuel ratio can be used.

Abstract: A control apparatus for a supercharged internal combustion engine, which can achieve a target torque accurately even if the target torque contains a high-frequency vibration component. The control apparatus determines a target air quantity and a target boost pressure from a target torque, operates an actuator for air quantity control according to the target air quantity, and operates an actuator for boost pressure control according to the target boost pressure. The target torque is formed to contain a low-frequency torque component that is set at all times based on a torque requirement from a driver and a high-frequency torque component that is set as necessary for a specific type of vehicle control. When the target torque contains only the low-frequency torque component, the target boost pressure is formed using a pressure component corresponding to the low-frequency torque.

Abstract: A control device for an internal combustion engine provided by the present invention is a control device which can satisfy a requirement concerning exhaust gas performance of the internal combustion engine, a requirement concerning fuel economy performance, and a requirement concerning operation performance with an excellent balance by properly regulating a change speed of a required air-fuel ratio and an ignition timing. The present control device keeps the ignition timing at an optimal ignition timing if a predetermined permission condition is not satisfied. However, when the permission condition is satisfied, the present control device controls the ignition timing so as to compensate for a difference which occurs between torque which is estimated from an operation of an actuator for air quantity control and required torque by the ignition timing.

Abstract: A control apparatus of an internal combustion engine capable of appropriately reflecting various requests relating to the performance of the internal combustion engine. Specifically, the control device of the internal combustion engine acquires various requests relating to the performance of the internal combustion engine, and sets restricted ranges of the value of the control variable in accordance with the details of the requests. At this moment, the control device temporally changes the set restricted ranges for specific requests associated with the time integral value of the control variable rather than the instantaneous value of the control variable. Subsequently, the control device determines a final restricted range on the basis of the overlap between the restricted ranges set for each request, and determines the target value of the control variable in the final restricted range.

Abstract: A control device for an internal combustion engine provided by the present invention is a control device which can enhance precision of realization of required torque while enhancing emission performance by positively changing an air-fuel ratio. The present control device generates a target air-fuel ratio by lessening a change speed of a required air-fuel ratio of an internal combustion engine. However, in a situation in which the required air-fuel ratio is made rich with return from fuel cut, lessening of the change speed of the required air-fuel ratio is stopped, and the required air-fuel ratio is directly outputted as a target air-fuel ratio. The control device calculates a target air quantity for realizing the required torque under the target air-fuel ratio. For calculation of the target air quantity, data in which relationship of torque generated by the internal combustion engine and an air quantity taken into a cylinder is fixed by being related to an air-fuel ratio can be used.

Abstract: An internal combustion engine control device the present invention provides is a control device that can realize both of request torque and a request A/F for each of cylinder groups with high precision, even when the request A/F differs at each of the cylinder groups. The present control device sets a reference A/F within a range from the leanest A/F to the richest A/F out of the request A/Fs to the respective cylinder groups. The present control device calculates a target air quantity for realizing the request torque under the reference A/F, based on data that defines a relation between engine output torque and an air quantity in relation to an A/F. The present control device controls a throttle opening in accordance with the target air quantity, and controls fuel injection amounts of the respective cylinders in accordance with the request A/F s to the respective cylinder groups.

Abstract: A control device for an internal combustion engine that enhances precision of realization of required torque while enhancing emission performance by positively changing an air-fuel ratio. The control device generates a target air-fuel ratio by lessening a change speed of a required air-fuel ratio of an internal combustion engine. However, when the required air-fuel ratio is made rich with return from fuel cut, lessening of the change speed of the required air-fuel ratio is stopped, and the required air-fuel ratio is directly outputted as a target air-fuel ratio. The control device calculates a target air quantity for realizing the required torque under the target air-fuel ratio. The control device manipulates an actuator for air quantity control in accordance with the target air quantity, and manipulates an actuator for fuel injection quantity control in accordance with the target air-fuel ratio.