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: In an engine controller with a feed back control system, an instruction signal for controlling an engine condition adjusting device is determined on the basis of a comparison between an input signal corresponding to a desired engine condition and an actual engine condition signal when the engine controller, the engine condition adjusting device and a sensor for generating the actual engine condition signal operates normally, and is determined on the basis of the input signal while preventing the instruction signal from being determined on the basis of the comparison between the input signal and the actual engine condition signal when an abnormality of at least one of the engine controller, the engine condition adjusting device and the sensor is detected.

Abstract: The invention provides a CPU diagnosing device and method comprising an arithmetic processing section provided with a plurality of processing states, a exercise setting section for setting exercises and a exercise processing section which is programmed to match the plurality of processing states wherein the exercise processing section provides solutions to the exercises for diagnosing the CPU based on the matched processing states.

Abstract: In a control apparatus for use in an internal combustion engine which has an exhaust gas sensor adapted to detect exhaust gas components and provide an output deliver to an air-fuel ratio of mixture and which performs stratified charge combustion, signals for controlling the air-fuel ratio of mixture and the fuel injection timing are generated on the basis of the output of the exhaust gas sensor. When an optimal air-fuel ratio responsible for combustion stability is changed as a result of execution of EGR and evaporative fuel purging, a change of the air-fuel ratio is determined by using the output of the exhaust gas sensor. When the influence of the EGR or the evaporative fuel purging upon the air-fuel ratio is great, the air-fuel ratio is corrected and the fuel injection timing or the ignition timing is corrected.

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: The invention provides a CPU diagnosing device and method comprising an arithmetic processing section provided with a plurality of processing states, a exercise setting section for setting exercises and a exercise processing section which is programmed to match the plurality of processing states wherein the exercise processing section provides solutions to the exercises for diagnosing the CPU based on the matched processing states.

Abstract: The variation of the A/F ratio and the deterioration of driving feeling or exhaust owing to the response delay of air intake against the fuel injection is suppressed, in an engine control apparatus for controlling an intake air flow based on the torque or the fuel injection amount. The apparatus causes the phase of fuel injection to fit to that of air intake. In order to fit the phase of fuel injection to that of air intake, an apparatus for delaying the fuel injection or an apparatus for speeding up the air intake is used.

Abstract: In a control apparatus for use in an internal combustion engine which has an exhaust gas sensor adapted to detect exhaust gas components and provide an output deliver to an air-fuel ratio of mixture and which performs stratified charge combustion, signals for controlling the air-fuel ratio of mixture and the fuel injection timing are generated on the basis of the output of the exhaust gas sensor. When an optimal air-fuel ratio responsible for combustion stability is changed as a result of execution of EGR and evaporative fuel purging, a change of the air-fuel ratio is determined by using the output of the exhaust gas sensor. When the influence of the EGR or the evaporative fuel purging upon the air-fuel ratio is great, the air-fuel ratio is corrected and the fuel injection timing or the ignition timing is corrected.

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: The variation of the A/F ratio and the deterioration of driving feeling or exhaust owing to the response delay of air intake against the fuel injection is suppressed, in an engine control apparatus for controlling an intake air flow based on the torque or the fuel injection amount.

Abstract: An engine control apparatus controls an intake air flow based on the engine torque or the fuel injection amount. A variation of the A/F ratio and deterioration of a driving “feel” owing to the response delay of air intake against the fuel injection is suppressed. The phase of fuel injection is caused to fit that of the air intake phase by delaying the fuel injection or by speeding up the air intake.

Abstract: There is provided an engine control apparatus with electromagnetically driven intake and exhaust valves which can widen the dynamic range of engine brake torque. The valve open timing of the electromagnetic exhaust valve during fuel cut is made to be variable between the initial stage of expansion stroke and the late stage thereof so as to control the magnitude of engine brake torque.

Abstract: A control apparatus for an engine includes a burn mode determining unit for determining a stoichiometric burn mode or a lean burn mode, and a stratified charge burn mode or a homogeneous charge burn mode. A target A/F calculating unit calculates a target A/F according to the operational point of the engine and a phase lag filter changes the phase of said calculated target A/F. A first target A/F modifying unit modifies the target A/F whose phase is delayed, so that an unstable burn region is avoided and a second target A/F modifying unit further modifies the modified target A/F during a transitional period when the operation is switched so as to avoid the unstable region. A target A/F selecting unit selects one of the modified A/F modified by the first target A/F modifying unit and the target A/F modified by the second A/F modifying unit.

Abstract: An electronic engine control system for a lean burn engine includes a unit for detecting an amount Qa of intake air fed into a cylinder of the engine, a unit for detecting an engine speed Ne, a unit for calculating a basic fuel injection pulse width TPbas on the basis of the intake air amount Qa and the engine speed Ne, and a unit for determining control parameters containing any of at least an air-fuel ratio, an ignition timing, a fuel injection timing, a throttle opening and an EGR rate in accordance with an operating state of the engine in optimum. A reference TPref having the same dimension as the basic fuel injection pulse width TPbas and which is a function of an accelerator operating amount determined on the basis of the accelerator operating amount is determined as a load parameter used upon determination of the control parameters of the engine in operation with a lean air-fuel ratio. Because the accelerator opening amount is inputted to calculate the reference .sub.

Abstract: A controller of a direct injection engine is basically provided with a swirl control valve arranged in an air intake port portion, a fuel injection valve and a variable fuel pressure regulator, further provided with means for controlling fuel pressure by the variable fuel pressure regulator, means for detecting operational conditions and means for detecting a combustion state, and still further provided with means for controlling a valve opening of the swirl control valve on the basis of the operational conditions and the combustion state.