Abstract: An intake air flow rate into an intake passage is detected with an internal combustion engine as a control device, and atmospheric pressure and temperature are estimated or detected. An intake passage internal average pressure and an intake passage internal average temperature in a region up to a throttle valve of the intake passage as one region are estimated. Distributions of a pressure and a temperature inside the intake passage are estimated based on the estimated intake passage internal average pressure, the intake passage internal average temperature, and a model of energy change caused by a constituent element included in the intake passage.

Abstract: A rotation speed or a rotation time of a crankshaft at a certain angle is calculated on a basis of a change in a detection signal of a sensor of the crankshaft. Then, when a combustion cylinder is switched, information on the rotation speed or the rotation time for at least two combustion cycles is obtained, and a combustion phase is calculated on the basis of the rotation speed or the rotation time. Accordingly, by using the that measures rotation of the crankshaft, it becomes possible to detect a combustion state of the internal combustion engine with high accuracy.

Abstract: A processor (CPU 40e) of a control device (ECU 0) for an internal combustion engine identifies a first throttle valve opening degree ?A and a second throttle valve opening degree ?B at which a change rate (differential value) of an index (a deposit thickness, a decrease rate of an effective opening area, a flow rate decrease rate, and the like) correlated with a decrease rate of an effective opening area of a throttle valve changes (s109). The processor (CPU 40e) estimates an index at any throttle valve opening degree from the first throttle valve opening degree ?A and the second throttle valve opening degree ?B (s110), and calculates an effective opening area of the throttle valve from the estimated index (s112).

Abstract: An object of the present invention is to provide a fuel injection control device capable of improving the execution frequency and accuracy of individual difference detection of a plurality of fuel injection valves.

Abstract: A rotation speed or a rotation time of a crankshaft at a certain angle is calculated on a basis of a change in a detection signal of a sensor of the crankshaft. Then, when a combustion cylinder is switched, information on the rotation speed or the rotation time for at least two combustion cycles is obtained, and a combustion phase is calculated on the basis of the rotation speed or the rotation time. Accordingly, by using the that measures rotation of the crankshaft, it becomes possible to detect a combustion state of the internal combustion engine with high accuracy.

Abstract: To provide a control device capable of calculating a cam phase equal to an actual cam angle even when a corresponding cam angle signal detection range is exceeded by changing a cam phase by a variable valve mechanism. In addition to the conventional cam angle measuring function, a cam angle measuring means for advancing or retarding beyond a cam angle measurement reference position, and a means for determining that the cam angle signal advances or retards beyond the cam angle measurement reference position are provided. By switching the cam angle measuring function according to a determination result as to whether the cam angle signal exceeds the cam angle measurement reference position, it is possible to improve the time resolution of the angle measurement while maintaining the cam phase change amount at the same wide angle as the conventional one.

Abstract: An object of the present invention is to provide a fuel injection control device capable of improving the execution frequency and accuracy of individual difference detection of a plurality of fuel injection valves.

Abstract: In abnormality determination of determining whether fuel injection has been executed normally, making an erroneous determination is prevented. A fuel injection control device 127 that controls a plurality of fuel injection valves each having a coil for energization includes a drive state detection unit 211 that detects a drive state of a fuel injection valve, from an energization current or an applied voltage of the coil of the fuel injection valve, an injection abnormality detection unit 213 that detects an injection abnormality of the fuel injection valve by comparing a fuel injection instruction with the drive state of the fuel injection valve, and an injection abnormality detection execution determining unit 212 that based on a state of an internal combustion engine, determines whether or not to permit execution of injection abnormality detection by the injection abnormality detection unit 213.

Abstract: An injection amount variation of a plurality of fuel injection valves is reduced regardless of a state of an engine.

Abstract: Provided is a solenoid valve control device capable of detecting a motion of a valve body in response to a drive command without adding a special circuit. According to the present invention, a solenoid valve control device controls opening and closing of a solenoid valve in an internal combustion engine system including: a fuel pump including a plunger that that increases or decreases a volume of a pressurizing chamber by moving up and down with rotation of a pump drive cam, a solenoid valve for sucking fuel into the pressurizing chamber, and a discharge valve for discharging fuel in the pressurizing chamber; and a fuel rail (common rail) that accumulates fuel discharged by the fuel pump. The solenoid valve control device includes a control unit that determines whether or not closing of the solenoid valve has succeeded based on fuel pressure 604 of the fuel rail, or calculates a discharge amount by closing the solenoid valve based on the fuel pressure of the fuel rail.

Abstract: Low noise control of a high-pressure fuel pump is performed by reducing noise generated by an anchor colliding with a fixing core. A control device 800 for a high-pressure fuel pump controls a suction valve that opens and closes an inflow port through which fuel flows to a pressurizing chamber by performing energization to a solenoid 205 in synchronization with a reciprocating motion of a plunger. A current energized to the solenoid 205 includes a peak current for giving a force to start closing a valve to the suction valve in a stationary state and a holding current for performing switching in a range smaller a maximum value of the peak current in order to hold the suction valve in a valve closing state.

Abstract: Provided is an ignition control device capable of suppressing wear of an ignition plug due to occurrence of a re-strike without adding a component.

Abstract: Appropriate detection of an abnormality of voltage information, which is a basis for correcting a fuel injection amount, becomes possible.

Abstract: In abnormality determination of determining whether fuel injection has been executed normally, making an erroneous determination is prevented. A fuel injection control device 127 that controls a plurality of fuel injection valves each having a coil for energization includes a drive state detection unit 211 that detects a drive state of a fuel injection valve, from an energization current or an applied voltage of the coil of the fuel injection valve, an injection abnormality detection unit 213 that detects an injection abnormality of the fuel injection valve by comparing a fuel injection instruction with the drive state of the fuel injection valve, and an injection abnormality detection execution determining unit 212 that based on a state of an internal combustion engine, determines whether or not to permit execution of injection abnormality detection by the injection abnormality detection unit 213.

Abstract: Provided is an ignition control device capable of suppressing wear of an ignition plug due to occurrence of a re-strike without adding a component.

Abstract: To provide a control device capable of calculating a cam phase equal to an actual cam angle even when a corresponding cam angle signal detection range is exceeded by changing a cam phase by a variable valve mechanism. In addition to the conventional cam angle measuring function, a cam angle measuring means for advancing or retarding beyond a cam angle measurement reference position, and a means for determining that the cam angle signal advances or retards beyond the cam angle measurement reference position are provided. By switching the cam angle measuring function according to a determination result as to whether the cam angle signal exceeds the cam angle measurement reference position, it is possible to improve the time resolution of the angle measurement while maintaining the cam phase change amount at the same wide angle as the conventional one.

Abstract: Provided is a solenoid valve control device capable of detecting a motion of a valve body in response to a drive command without adding a special circuit. According to the present invention, a solenoid valve control device controls opening and closing of a solenoid valve in an internal combustion engine system including: a fuel pump including a plunger that that increases or decreases a volume of a pressurizing chamber by moving up and down with rotation of a pump drive cam, a solenoid valve for sucking fuel into the pressurizing chamber, and a discharge valve for discharging fuel in the pressurizing chamber; and a fuel rail (common rail) that accumulates fuel discharged by the fuel pump. The solenoid valve control device includes a control unit that determines whether or not closing of the solenoid valve has succeeded based on fuel pressure 604 of the fuel rail, or calculates a discharge amount by closing the solenoid valve based on the fuel pressure of the fuel rail.

Abstract: Low noise control of a high-pressure fuel pump is performed by reducing noise generated by an anchor colliding with a fixing core. A control device 800 for a high-pressure fuel pump controls a suction valve that opens and closes an inflow port through which fuel flows to a pressurizing chamber by performing energization to a solenoid 205 in synchronization with a reciprocating motion of a plunger. A current energized to the solenoid 205 includes a peak current for giving a force to start closing a valve to the suction valve in a stationary state and a holding current for performing switching in a range smaller a maximum value of the peak current in order to hold the suction valve in a valve closing state.

Abstract: An injection amount variation of a plurality of fuel injection valves is reduced regardless of a state of an engine.

Abstract: Provided is a fuel injection control device capable of reducing variations in injection amounts of a plurality of fuel injection valves. Thus, the fuel injection control device of the present invention includes a control unit that controls voltages applied to coils of a plurality of fuel injection valves, the coils being adapted for energization. The control unit performs control such that the voltage being applied to the coil is cut off. The control unit changes a timing at which the cutoff of the voltage to the coil of at least one fuel injection valve is started or a timing at which the cutoff of the voltage to the coil of at least one fuel injection valve is ended, based on a valve closing time until closing of the fuel injection valve is completed or a valve opening time until opening of the fuel injection valve is completed.