Abstract: There are provided a control device and an abnormal combustion detecting method for detecting occurrence of abnormal combustion during an expansion stroke of an internal combustion engine. The control device of the present invention receives a detection signal of a vibration sensor for detecting pressure vibration in a combustion chamber, and detects occurrence of knocking based on a knocking-specific frequency component extracted from the detection signal in a knocking determination region within the expansion stroke. In addition, the control device detects the characteristic value, different from the knocking-specific frequency component, of the detection signal in an abnormal combustion determination region which includes the knocking determination region and which expands over the compression stroke before ignition timing and the expansion stroke, and detects self-ignition during the compression stroke before ignition timing and self-ignition during the expansion stroke, based on the characteristic value.

Abstract: Provided is a system of carrying out engagement of a pinion and a ring gear at optimal timing and suppressing a bite-in sound, in a vehicle including an idle stop system. In a vehicle control device including an automatic stop unit which automatically stops an engine on the basis of an operating state of a vehicle; an automatic start unit which controls a starter during a period until the engine completely stops after the automatic stop unit executes the automatic stop of the engine, and restarts the engine; and an engine rotation detection unit which detects or operates a crank phase or a rotation number of the engine, the automatic start unit determines a control command of the starter at an interval shorter than an update interval of a signal of the engine rotation detection unit.

Abstract: Provided is a system of carrying out engagement of a pinion and a ring gear at optimal timing and suppressing a bite-in sound, in a vehicle including an idle stop system. In a vehicle control device including an automatic stop unit which automatically stops an engine on the basis of an operating state of a vehicle; an automatic start unit which controls a starter during a period until the engine completely stops after the automatic stop unit executes the automatic stop of the engine, and restarts the engine; and an engine rotation detection unit which detects or operates a crank phase or a rotation number of the engine, the automatic start unit determines a control command of the starter at an interval shorter than an update interval of a signal of the engine rotation detection unit.

Abstract: Control device of an internal combustion engine that determines whether or not to perform sensor element heating control of an air-fuel ratio sensor with high accuracy based on the mass of condensed water in an exhaust pipe. The control device computes the rate of change of condensed water mass in an exhaust pipe based on the saturated water vapor pressure and the water vapor partial pressure of exhaust gas, and computes the rate of change of evaporation mass in the exhaust pipe based on the amount of heat which the condensed water receives in the exhaust pipe. The control device updates the mass of condensed water based on the rate of change of condensed water mass and the rate of change of evaporation mass, and determines whether or not to perform heating control by a heating controlling unit based on the updated mass of condensed water.

Abstract: Control device of an internal combustion engine that determines whether or not to perform sensor element heating control of an air-fuel ratio sensor with high accuracy based on the mass of condensed water in an exhaust pipe. The control device computes the rate of change of condensed water mass in an exhaust pipe based on the saturated water vapor pressure and the water vapor partial pressure of exhaust gas, and computes the rate of change of evaporation mass in the exhaust pipe based on the amount of heat which the condensed water receives in the exhaust pipe. The control device updates the mass of condensed water based on the rate of change of condensed water mass and the rate of change of evaporation mass, and determines whether or not to perform heating control by a heating controlling unit based on the updated mass of condensed water.

Abstract: A high-pressure fuel pump of an internal combustion engine has a fuel injection valve provided on a cylinder. The high-pressure fuel pump is for pumping fuel to the fuel injection valve, and has a pressure chamber, a plunger for pressurizing the fuel in the pressure chamber, a fuel valve provided in the pressure chamber, and an actuator for operating the fuel valve. A control device has means for calculating the drive signal of the actuator so as to realize the variable discharge of the high-pressure fuel pump. The end timing of the drive signal is limited or restricted so that an attraction force of a solenoid coil is not maintained at the bottom dead center of the plunger in case that the required discharge to the fuel pump is less than the total discharge.

Abstract: A control device of a high-pressure fuel pump of an internal combustion engine capable of improving stability in controlling the drive of the high-pressure fuel pump by limiting the end timing of a drive signal of the high-pressure fuel pump and driving an actuator in a control effective range of the high-pressure fuel pump. The control device of the high-pressure fuel pump of the internal combustion engine has a fuel injection valve provided on a cylinder and the high-pressure fuel pump for pumping fuel to the fuel injection valve, wherein the high-pressure fuel pump comprises a pressure chamber, a plunger for pressurizing the fuel in the pressure chamber, a fuel valve provided in the pressure chamber, and the actuator for operating the fuel valve. The control device has means for calculating the drive signal of the actuator so as to realize the variable discharge of the high-pressure fuel pump.

Abstract: A control device of a high-pressure fuel pump of an internal combustion engine capable of improving stability in controlling the drive of the high-pressure fuel pump by limiting the end timing of a drive signal of the high-pressure fuel pump and driving an actuator in a control effective range of the high-pressure fuel pump. The control device of the high-pressure fuel pump of the internal combustion engine has a fuel injection valve provided on a cylinder and the high-pressure fuel pump for pumping fuel to the fuel injection valve, wherein the high-pressure fuel pump comprises a pressure chamber, a plunger for pressurizing the fuel in the pressure chamber, a fuel valve provided in the pressure chamber, and the actuator for operating the fuel valve. The control device has means for calculating the drive signal of the actuator so as to realize the variable discharge of the high-pressure fuel pump.

Abstract: A control device of a high-pressure fuel pump of an internal combustion engine capable of improving stability in controlling the drive of the high-pressure fuel pump by limiting the end timing of a drive signal of the high-pressure fuel pump and driving an actuator in a control effective range of the high-pressure fuel pump. The control device of the high-pressure fuel pump of the internal combustion engine has a fuel injection valve provided on a cylinder and the high-pressure fuel pump for pumping fuel to the fuel injection valve, wherein the high-pressure fuel pump comprises a pressure chamber, a plunger for pressurizing the fuel in the pressure chamber, a fuel valve provided in the pressure chamber, and the actuator for operating the fuel valve. The control device has means for calculating the drive signal of the actuator so as to realize the variable discharge of the high-pressure fuel pump.

Abstract: A control device of a high-pressure fuel pump of an internal combustion engine capable of improving stability in controlling the drive of the high-pressure fuel pump by limiting the end timing of a drive signal of the high-pressure fuel pump and driving an actuator in a control effective range of the high-pressure fuel pump. The control device of the high-pressure fuel pump of the internal combustion engine has a fuel injection valve provided on a cylinder and the high-pressure fuel pump for pumping fuel to the fuel injection valve, wherein the high-pressure fuel pump comprises a pressure chamber, a plunger for pressurizing the fuel in the pressure chamber, a fuel valve provided in the pressure chamber, and the actuator for operating the fuel valve. The control device has means for calculating the drive signal of the actuator so as to realize the variable discharge of the high-pressure fuel pump.

Abstract: A control device of a high-pressure fuel pump of an internal combustion engine capable of improving stability in controlling the drive of the high-pressure fuel pump by limiting the end timing of a drive signal of the high-pressure fuel pump and driving an actuator in a control effective range of the high-pressure fuel pump. The control device of the high-pressure fuel pump of the internal combustion engine has a fuel injection valve provided on a cylinder and the high-pressure fuel pump for pumping fuel to the fuel injection valve, wherein the high-pressure fuel pump comprises a pressure chamber, a plunger for pressurizing the fuel in the pressure chamber, a fuel valve provided in the pressure chamber, and the actuator for operating the fuel valve. The control device has means for calculating the drive signal of the actuator so as to realize the variable discharge of the high-pressure fuel pump.

Abstract: A control system for an automotive vehicle is capable of realizing superior control precision and response ability by an intake air flow rate control on the basis of a fuel injection amount which is, in turn, derived on the basis of a target torque even in lean-burn condition. The control system controls at least one of vehicle speed, a vehicular distance, driving wheel speed, slip ratio toward a target value, derives a target torque of an engine on the basis of the target value, a fuel injection amount for the engine on the basis of the target torque of the engine, a target air supply amount to the engine on the basis of the fuel injection amount derived by the vehicle condition control means and an actual air supply amount of the engine. The control system controls the actual air supply amount toward the target air supply amount.

Abstract: A control system for an automotive vehicle is capable of realizing superior control precision and response ability by an intake air flow rate control on the basis of a fuel injection amount which is, in turn, derived on the basis of a target torque even in lean-burn condition. The control system controls at least one of vehicle speed, a vehicular distance, driving wheel speed, slip ratio toward a target value, derives a target torque of an engine on the basis of the target value, a fuel injection amount for the engine on the basis of the target torque of the engine, a target air supply amount to the engine on the basis of the fuel injection amount derived by the vehicle condition control means and an actual air supply amount of the engine. The control system controls the actual air supply amount toward the target air supply amount.

Abstract: A control arrangement for an internal combustion engine which includes a fuel supply system, an air/fuel ratio control system, an abnormality diagnoser which diagnoses a possible abnormality in the fuel supply system, when the pressure of the pressurized fuel in the fuel supply system detected by a fuel pressure senor exceeds predetermined upper and lower limits determined by a control duty for an electrically controlled pressure regulator, and an abnormal element decider which decides an abnormality either in the fuel pressure sensor or in the electrically controlled pressure regulator based on an amount representing an air/fuel ratio status including the actual air/fuel ratio and the air/fuel ratio feed back control amount extracted from the air/fuel ratio control system for the internal combustion engine, when the abnormality diagnoser diagnoses an abnormality in the fuel supply system.

Abstract: A fuel pressure control apparatus for cylinder injection engine having a fuel injection valve for injecting fuel into a cylinder of an engine, a pipe for conducting the fuel to the fuel injection valve, a fuel pump for supplying the fuel from a fuel supply system to the pipe, a fuel pressure regulator for regulating the fuel pressure within the pipe by discharging the fuel from the pipe to the fuel supply system, and a control unit for making feed-back control on the fuel pressure within the pipe by applying a control signal determined on the basis of an engine operation parameter to the fuel pressure regulator, wherein the fuel pressure regulator is controlled in a feed-forward manner by a predetermined control value so as to make better fuel pressure control at the time of start and when the fuel pressure transiently changes.