Abstract: A second switch (7) is provided between a first power supply circuit including a first capacitor (4) connected in series with a first switch (6) and a second power supply circuit including a second capacitor (5). In a case where a predetermined condition that necessitates supply of electric power from one power supply circuit to the other power supply circuit is established, the first switch (6) is opened to disconnect the first capacitor (4) in the first power supply circuit, and then the second switch (7) is closed to connect between the first power supply circuit and the second power supply circuit.

Abstract: An in-vehicle power storage device that discharges a battery in a case where collision of a vehicle is detected or predicted, and stops discharging the battery when an over-discharged state has not been reached, and a control method thereof. The in-vehicle power storage device includes: a battery mounted in a vehicle; charge-state detection means for detecting a charge state of the battery; and a discharging load for discharging the battery, and a control device which includes: battery charge-state detection means for detecting a charge state; a battery discharger means for discharging the battery using the load if collision of the vehicle is detected or predicted; and discharge stopping means to stop discharging the battery before the battery becomes over-discharged.

Abstract: Provided are a power generation control method for a vehicle configured to perform idling stop at a predetermined vehicle speed or less by a stop/start system, the vehicle including: a power generator configured to be driven by an internal combustion engine to generate power; and a battery to be charged by the power generated by the power generator, the power being generated in the vehicle under control so as to reduce an amount of fuel to be consumed by the internal combustion engine for power generation, the power generation control method including: detecting a charged and discharged state of the battery; and controlling the internal combustion engine to interrupt power generation involving fuel consumption when a charged state of the battery has recovered to a charged state before the idling stop through charging after the idling stop in accordance with the detected charged and discharged state.

Abstract: A vehicular power generation system includes: a battery which is charged by power generation electric power of a generator that is driven by an internal combustion engine; and a power generation control device which reduces the amount of fuel to be consumed for power generation of the internal combustion engine. The power generation control device includes: a unit which sets an operating range that is small in the amount of fuel to be consumed for an increase in torque of the internal combustion engine; a unit which sets electric power with high power generation efficiency to a target value of power generation electric power according to rotation speed and power generation voltage of the generator; and a unit which controls so that the amount of power generation of the generator is a target value when the operating point of the internal combustion engine is in the operating range.

Abstract: A control device (10) includes: target deceleration calculation means (101) for calculating a target deceleration by using a target deceleration map in which a target deceleration is set for each vehicle speed; command power-generation torque calculation means (102) for calculating a command power-generation torque based on the target deceleration, a rotation speed of a power generator (2), and a transmission gear ratio of a transmission (3); and command Duty calculation means (103) for calculating a command Duty based on the command power-generation torque, and the rotation speed and an output voltage of the power generator (2). The target deceleration map is calculated based on a vehicle-speed shift in accordance with actual running conditions when a vehicle is decelerating with fuel stop.

Abstract: A vehicular power generation system includes: a battery which is charged by power generation electric power of a generator that is driven by an internal combustion engine; and a power generation control device which reduces the amount of fuel to be consumed for power generation of the internal combustion engine. The power generation control device includes: a unit which sets an operating range that is small in the amount of fuel to be consumed for an increase in torque of the internal combustion engine; a unit which sets electric power with high power generation efficiency to a target value of power generation electric power according to rotation speed and power generation voltage of the generator; and a unit which controls so that the amount of power generation of the generator is a target value when the operating point of the internal combustion engine is in the operating range.

Abstract: An internal combustion engine control apparatus includes a first period in which the target heater applied effective voltage is set to a first target voltage with which the temperature of an exhaust gas sensor becomes a target temperature at a time when the internal combustion engine is being operated; a second control period in which after the automatic stop mode of the engine has started, the target heater applied effective voltage is set to a second target voltage lower than the first target voltage; and a third period in which after the second period, the target heater applied effective voltage is controlled to a third target voltage higher than the second target voltage and with which the temperature of an exhaust gas sensor becomes a target temperature at a time when the engine is in the automatic stop mode.

Abstract: An internal combustion engine fuel pressure control apparatus includes: fuel pressure control means including a spill valve and a high-pressure fuel pump that pressure-feeds fuel to an accumulation chamber; and control means that calculates a control quantity of the fuel pressure control means on the basis of pressure information of fuel supplied to an injector and variably sets the pressure of the fuel supplied to the injector, wherein the control quantity calculated by the control means is configured by a first feedback quantity that feeds back the fuel quantity that the high-pressure fuel pump pressure-feeds to the accumulation chamber and a second feedback quantity that feeds back the timing at which the spill valve opens or closes a fuel relief path.

Abstract: A fuel pressure control device includes a fuel injection valve, a pressure accumulation chamber for storing a high pressure fuel, a high pressure pump, a fuel pressure control valve, a fuel pressure sensor for detecting a fuel pressure PR in the pressure accumulation chamber, an air-fuel ratio sensor for detecting an air-fuel ratio condition, target value calculation means for calculating a target fuel pressure and a target air-fuel ratio AFo, fuel pressure control means for performing feedback control of the fuel pressure control valve such that the fuel pressure PR matches the target fuel pressure, abnormality diagnosis means for diagnosing the fuel pressure sensor, and fuel pressure estimation means for calculating an estimated fuel pressure PRs based on the air-fuel ratio condition when an abnormal condition occurs. The fuel pressure estimation means corrects the estimated fuel pressure PRs such that the air-fuel ratio condition is guided to the target air-fuel ratio AFo.

Abstract: A fuel pressure sensing apparatus for an internal combustion engine control unit is capable of compensating for deterioration in the detection accuracy of a fuel pressure sensor (16) caused by a sensor offset. The fuel pressure sensor (116) detects the pressure of compressed fuel in a fuel rail (113) to be supplied by an injector (115) to a combustion chamber defined in each cylinder of the internal combustion engine. A sensor characteristic learning part in the form of an ECU (117) performs learning correction by calculating a learned correction value to correct an output value of the fuel pressure sensor (116) when the engine or a feed pump (102) is stopped.

Abstract: The present invention provides a fuel injection control device which can prevent the occurrence of a phenomenon that when a pressure of fuel in the inside of a pressure storage chamber is elevated during a fuel cut, and the injection of fuel is restarted, the fuel is injected at a high fuel pressure largely different from a target fuel pressure. Accordingly, the fuel injection control device can prevent the deterioration of an exhaust gas and the occurrence of an engine stop.

Abstract: A fuel pressure control device includes a fuel injection valve, a pressure accumulation chamber for storing a high pressure fuel, a high pressure pump, a fuel pressure control valve, a fuel pressure sensor for detecting a fuel pressure PR in the pressure accumulation chamber, an air-fuel ratio sensor for detecting an air-fuel ratio condition, target value calculation means for calculating a target fuel pressure and a target air-fuel ratio AFo, fuel pressure control means for performing feedback control of the fuel pressure control valve such that the fuel pressure PR matches the target fuel pressure, abnormality diagnosis means for diagnosing the fuel pressure sensor, and fuel pressure estimation means for calculating an estimated fuel pressure PRs based on the air-fuel ratio condition when an abnormal condition occurs. The fuel pressure estimation means corrects the estimated fuel pressure PRs such that the air-fuel ratio condition is guided to the target air-fuel ratio AFo.

Abstract: The present invention provides a fuel injection control device which can prevent the occurrence of a phenomenon that when a pressure of fuel in the inside of a pressure storage chamber is elevated during a fuel cut, and the injection of fuel is restarted, the fuel is injected at a high fuel pressure largely different from a target fuel pressure. Accordingly, the fuel injection control device can prevent the deterioration of an exhaust gas and the occurrence of an engine stop.

Abstract: To provide a fuel supply device for an internal combustion engine including an ECU (22), in which, when the pressure in the fuel rail (2) is a high pressure greater than a maximum pressure (Pm) that can drive the injector (1) and the stopped engine (100), the ECU (22) opens the injector (1) to inject high pressure fuel in the fuel rail (2) into the stopped engine (100).

Abstract: Apparatus for diagnosing high pressure fuel system of a cylinder injection type engine includes fuel pump (18), spill valve (33), fuel injectors (15), fuel pressure sensor (19) and fuel pressure control means (30). A control period for the pump (18) covers an intake period and a discharge period. The discharge period covers spill valve closing period and spill valve opening period. Fuel pressure control means (30) includes spill valve control period setting means for adjusting spill valve closing/opening periods, abnormality decision period detecting means for detecting as abnormality decision period the spill valve opening period during the discharge period in the engine operation, pressure change arithmetic means for determining change of the fuel pressure (PF) on the basis of the abnormality decision period, and diagnosing means for deciding as to abnormality of the spill valve (33), based on the change of the fuel pressure (PF).

Abstract: To provide a fuel supply device for an internal combustion engine including an ECU (22), in which, when the pressure in the fuel rail (2) is a high pressure greater than a maximum pressure (Pm) that can drive the injector (1) and the stopped engine (100), the ECU (22) opens the injector (1) to inject high pressure fuel in the fuel rail (2) into the stopped engine (100).

Abstract: A fuel pressure sensing apparatus for an internal combustion engine control unit is capable of compensating for deterioration in the detection accuracy of a fuel pressure sensor (16) caused by a sensor offset. The fuel pressure sensor (116) detects the pressure of compressed fuel in a fuel rail (113) to be supplied by an injector (115) to a combustion chamber defined in each cylinder of the internal combustion engine. A sensor characteristic learning part in the form of an ECU (117) performs learning correction by calculating a learned correction value to correct an output value of the fuel pressure sensor (116) when the engine or a feed pump (102) is stopped.

Abstract: A control system for an internal combustion engine equipped with an automatic transmission capable of performing controls of the engine at a minimum fuel-performance cost or fuel consumption even in a nonlock-up state by correcting a target driving power so as to conform with a transmission efficiency of the automatic transmission.