Abstract: Transmission shocks and idling defects such as engine racing and rough idling due to aging of a throttle opening area are prevented from occurring. An internal combustion engine control apparatus for controlling an internal combustion engine that has an air flow rate sensor for measuring a rate of air represented as an actual air rate, the air flowing into a cylinder, and a throttle valve for adjusting the rate of air, includes a throttle valve controlling section for controlling a throttle opening of the throttle valve to reach a preset throttle opening set depending on a target air rate for realizing a demand torque, and a throttle opening correcting section for correcting the preset throttle opening on the basis of the target air rate upon fuel cutoff that stops a fuel from being supplied to the internal combustion engine and of an actual air rate measured by the air flow rate sensor.

Abstract: Transmission shocks and idling defects such as engine racing and rough idling due to aging of a throttle opening area are prevented from occurring. An internal combustion engine control apparatus for controlling an internal combustion engine that has an air flow rate sensor for measuring a rate of air represented as an actual air rate, the air flowing into a cylinder, and a throttle valve for adjusting the rate of air, includes a throttle valve controlling section for controlling a throttle opening of the throttle valve to reach a preset throttle opening set depending on a target air rate for realizing a demand torque, and a throttle opening correcting section for correcting the preset throttle opening on the basis of the target air rate upon fuel cutoff that stops a fuel from being supplied to the internal combustion engine and of an actual air rate measured by the air flow rate sensor.

Abstract: Provided is a novel control device of an internal combustion engine capable of estimating an EGR rate in a transient state with high accuracy. Thus, in the present invention, unit spaces are formed by dividing a reference space of the intake passage into a plurality of spaces along a streamline through which the gas mixture of the intake air and the EGR gas flows, a physical model based on an advection equation for estimating the EGR rate of the gas mixture is established so as to correspond to each of the unit spaces, and the EGR rate at which the gas mixture flows into the combustion chamber is estimated by sequentially estimating the EGR rates of the unit spaces connected to head unit spaces from the head unit spaces by the physical model.

Abstract: There is provided a novel throttle valve controller device for an internal combustion engine that is capable of accurately producing a target torque for the internal combustion engine. The present invention includes a target fresh intake air flow rate calculating section that calculates a target fresh intake air flow rate passing through a throttle valve, an EGR gas flow rate calculating section that calculates an estimated EGR gas flow rate passing through the throttle valve, a target throttle intake gas flow rate calculating section that calculates a target intake gas flow rate passing through the throttle valve on the basis of the target fresh intake air flow rate and the estimated EGR gas flow rate, and a target throttle valve opening calculating section that calculates a target throttle valve opening from the target intake gas flow rate.

Abstract: Provided is a novel control device of an internal combustion engine capable of estimating an EGR rate in a transient state with high accuracy. Thus, in the present invention, unit spaces are formed by dividing a reference space of the intake passage into a plurality of spaces along a streamline through which the gas mixture of the intake air and the EGR gas flows, a physical model based on an advection equation for estimating the EGR rate of the gas mixture is established so as to correspond to each of the unit spaces, and the EGR rate at which the gas mixture flows into the combustion chamber is estimated by sequentially estimating the EGR rates of the unit spaces connected to head unit spaces from the head unit spaces by the physical model.

Abstract: Provided is a fuel injection control device capable of accurately detecting a valve opening delay time of a fuel injection valve, and implementing high-precision minute injection control. A valve opening delay time of a fuel injection valve is estimated on the basis of a plurality of valve closing delay times obtained when the fuel injection valve is operated with injection pulse widths that are different injection pulse widths from each other and with which the fuel injection valve is in an intermediate lift state.

Abstract: Provided is a fuel injection control device capable of accurately detecting a valve opening delay time of a fuel injection valve, and implementing high-precision minute injection control. A valve opening delay time of a fuel injection valve is estimated on the basis of a plurality of valve closing delay times obtained when the fuel injection valve is operated with injection pulse widths that are different injection pulse widths from each other and with which the fuel injection valve is in an intermediate lift state.