Abstract: A diesel engine, includes: an exhaust gas recirculation device that recirculates an exhaust gas emitted from the diesel engine to an intake side of the diesel engine; an intake air amount sensor that measures an intake air amount of the diesel engine; a NOx measurement sensor that measures NOx contained in the exhaust gas emitted from the diesel engine; and a control device that obtains a correction value for correcting a measured value by the intake air amount sensor based on a difference between first information on NOx obtained based on information on a rotation speed of the diesel engine and information on a load and second information on NOx measured by the NOx measurement sensor to control the exhaust gas recirculation device based on the measured value by the intake air amount sensor corrected using the correction value.

Abstract: A diesel engine, includes: an exhaust gas recirculation device that recirculates an exhaust gas emitted from the diesel engine to an intake side of the diesel engine; an intake air amount sensor that measures an intake air amount of the diesel engine; a NOx measurement sensor that measures NOx contained in the exhaust gas emitted from the diesel engine; and a control device that obtains a correction value for correcting a measured value by the intake air amount sensor based on a difference between first information on NOx obtained based on information on a rotation speed of the diesel engine and information on a load and second information on NOx measured by the NOx measurement sensor to control the exhaust gas recirculation device based on the measured value by the intake air amount sensor corrected using the correction value.

Abstract: A diesel engine capable of favorably preventing the generation of white smoke even when an engine load is shifted from a high load side to a low load side. For this purpose, a diesel engine (1) includes fuel injection timing control means (42) for controlling fuel injection timing, the fuel injection timing control means (42) advances the fuel injection timing by predetermined time when an engine load becomes a predetermined load (Ff) or lower in an engine stopping step of stopping the diesel engine while gradually reducing the engine load.

Abstract: In a fuel injection apparatus 1, a fuel injection rate from which is controlled by a fuel pressure, a branch pipe 11 comprising a tubular member with the tip end closed is provided between a second pressure control valve 9 and a second pressure sensor 10. The branch pipe 11 extends in a direction along a flow direction of the fuel just before the branch pipe 11, and has a capacity not less than one fifth of that of a fuel flow path 22 between the second pressure control valve 9 and a fuel chamber 17. When a pressure difference in the pressure control valve 9 becomes larger and vibration of the fuel pressure is generated, the branch pipe 11 absorbs and reduces the vibration. As the vibration of the fuel pressure is reduced, a stable fuel injection rate is realized.

Abstract: A diesel engine capable of favorably preventing the generation of white smoke even when an engine load is shifted from a high load side to a low load side. For this purpose, a diesel engine (1) includes fuel injection timing control means (42) for controlling fuel injection timing, the fuel injection timing control means (42) advances the fuel injection timing by predetermined time when an engine load becomes a predetermined load (Ff) or lower in an engine stopping step of stopping the diesel engine while gradually reducing the engine load.

Abstract: A diesel engine (1) has: a flow adjuster (10) for throttling exhaust flow; an intake heater (71) for heating intake air; a thermal medium circulator (72) for circulating a thermal medium to warm the diesel engine (1); a cylinder cut-off device (73) for conducting cylinder cut-off; and a fuel injection timing advancing device (74) for advancing timing for supplying fuel to a cylinder, the respective devices being actuated at least from pre-high-idle step to a neighborhood of high-idle condition, so that fuel combustion stabilization of the diesel engine (1) can be rapidly enhanced during a period where less fuel is supplied into the cylinder and fuel combustion time is short, thus greatly reducing discharge of white smoke and possibility of engine bunching.

Abstract: In a fuel injection apparatus 1, a fuel injection rate from which is controlled by a fuel pressure, a branch pipe 11 comprising a tubular member with the tip end closed is provided between a second pressure control valve 9 and a second pressure sensor 10. The branch pipe 11 extends in a direction along a flow direction of the fuel just before the branch pipe 11, and has a capacity not less than one fifth of that of a fuel flow path 22 between the second pressure control valve 9 and a fuel chamber 17. When a pressure difference in the pressure control valve 9 becomes larger and vibration of the fuel pressure is generated, the branch pipe 11 absorbs and reduces the vibration. As the vibration of the fuel pressure is reduced, a stable fuel injection rate is realized.

Abstract: A diesel engine (1) has: a low adjuster (10) for throttling exhaust flow; an intake heater (71) for heating intake air, a thermal medium circulator (72) for circulating a thermal medium to warm the diesel engine (1); a cylinder cut-off device (73) for conducting cylinder cut-off; and a fuel injection timing advancing device (74) for advancing timing for supplying fuel to a cylinder, the receptive devices being actuated at least from pre-high-idle step to a neighborhood of high-idle condition, so that fuel combustion stabilization of the diesel engine (1) can be rapidly enhanced during a period where less fuel is supplied into the cylinder and fuel combustion time is short, thus greatly reducing discharge of white smoke and possibility of engine hunching.

Abstract: The invention provides a voltage control apparatus of an engine generator having a simple structure and capable of being made compact, and a control method thereof. Accordingly, in a method of controlling a voltage of an engine generator, the method includes steps of detecting an actually measured value (Ne) of an engine rotational speed at every predetermined time and controlling an output voltage of the power generator (4) in accordance with a deviation value (&agr;1) between a predetermined target value (Ne1) and the actually measured value when the actually measured value is equal to or less than the target value.

Abstract: An inductive load driving device in which the rise of load current at an initial stage of driving can be executed at high speed includes a plurality of step-up circuits (21, 31), for alternately applying a high voltage to the same inductive load within a predetermined period of time, to thereby allow each load current to rise at a high speed; a holding current output circuit (43), for applying a predetermined voltage to the same inductive load after the load current has risen, to thereby hold the load current at a predetermined value; a plurality of switching means (46, 47), adapted to be switched in such a manner that the respective outputs of the plurality of step-up circuits (21, 31) and the holding current output circuit (43) can be alternately connected to the same inductive load; and a control logic circuit (44), for switching the plurality of switching means (46, 47) in a predetermined sequence.

Abstract: The present invention is a control device and a control method for a cam driving type electronic control unit injector, in which driving force transmitting parts do not separate from a cam even when a high injection pressure is used.