Abstract: A high-pressure pump (8) for providing a pressurized supply of fuel in an engine furnished with a common rail type fuel injection apparatus is provided with two actuators (88, 89). Of these actuators (88, 89), one (88) is stopped and the operation for providing a pressurized supply of fuel is performed from only the other actuator (89), so that the timing at which the load torque that acts on the crankshaft of the engine becomes a local maximum and the timing at which the load torque that acts on the driveshaft of the high-pressure pump (8) becomes a local minimum are made to coincide with one another.

Abstract: In an electronic control governor (1) that adjusts amount of fuel supplied to an engine so as to coincide an engine rotation speed with an target rotation speed, by driving an actuator (2) for actuating a fuel adjusting mean, due to an actuator driving current overlapped with a dither current, an amplitude or frequency of the dither current is changed, corresponding to change in supply quantity of the actuator driving current. Or, the amplitude and frequency of the dither current are changed, corresponding to change in the engine rotation speed. Alternatively, a ratio between turn-on time and turn-off time during one period of the dither current is changed, depending on velocity ratio between increased velocity and decreased velocity of the actuator driving current. Preferably, the ratio of the turn-on time to one period of the dither current is set at 20 to 40%.

Abstract: Rotation recognition means for recognizing a revolution of a crankshaft based on the cylinders before the combustion cycle of a cylinder in question is provided. When the supply of fuel by injection from an injector to a certain cylinder of the six cylinders has become impossible, then control is performed to change the number of cylinders targeted by the rotation recognition means so as to recognize the revolution of the crankshaft for all six cylinders whose combustion cycles are consecutive prior to the combustion cycle of the cylinder in question, and to stop the supply of fuel from the injectors for supplying fuel to cylinders whose combustion cycles are equally spaced from the cylinder to which the supply of fuel is not possible, so that the spacing between the combustion cycles in the cylinders whose combustion cycles come before and after and sandwich the cylinder to which the supply of fuel is not possible becomes uniform.

Abstract: A fuel injection device of a diesel engine capable of smoothly starting the diesel engine to match an environment around the engine by saving fuel, reducing the exhaustion of carbon dioxide, and suppressing black smoke in starting the diesel engine. A rack is operated by an actuator from a lowest rack position to a starting increased fuel amount position at a lower speed than that at which the rack is operated by the actuator from the lowest rack position to the starting increased fuel amount position at the maximum operating speed. The operating speed of the rack is set in two stages, and the later operating speed of the rack is reduced less than the operating speed of the rack up to a set intermediate rack target value P2. Then, the operating amount of the rack per hour is reduced after the ignition of the engine is recognized. Also, the operating speed of the rack is controlled according to an atmospheric temperature in starting the engine.

Abstract: A fuel control method which recognizes a revolution of a crankshaft based on the cylinders before the combustion cycle of a cylinder in question. When the supply of fuel by injection from an injector to a certain cylinder of the six cylinders has become impossible, then control is performed to change the number of cylinders targeted by the rotation recognition means so as to recognize the revolution of the crankshaft for all six cylinders whose combustion cycles are consecutive prior to the combustion cycle of the cylinder in question, and to stop the supply of fuel from the injectors for supplying fuel to cylinders whose combustion cycles are equally spaced from the cylinder to which the supply of fuel is not possible, so that the spacing between the combustion cycles in the cylinders whose combustion cycles come before and after and sandwich the cylinder to which the supply of fuel is not possible becomes uniform.

Abstract: In one embodiment, the high-pressure pump (8) for providing a pressurized supply of fuel in an engine furnished with a common rail type fuel injection apparatus is provided with two actuators (88, 89). Of these actuators (88, 89), one (88) is stopped and the operation for providing a pressurized supply of fuel is performed from only the other actuator (89), so that the timing at which the load torque that acts on the crankshaft of the engine becomes a local maximum and the timing at which the load torque that acts on the driveshaft of the high-pressure pump (8) becomes a local minimum are made to coincide with one another.

Abstract: Rotation recognition means for recognizing a revolution of a crankshaft based on the cylinders before the combustion cycle of a cylinder in question is provided. When the supply of fuel by injection from an injector to a certain cylinder of the six cylinders has become impossible, then control is performed to change the number of cylinders targeted by the rotation recognition means so as to recognize the revolution of the crankshaft for all six cylinders whose combustion cycles are consecutive prior to the combustion cycle of the cylinder in question, and to stop the supply of fuel from the injectors for supplying fuel to cylinders whose combustion cycles are equally spaced from the cylinder to which the supply of fuel is not possible, so that the spacing between the combustion cycles in the cylinders whose combustion cycles come before and after and sandwich the cylinder to which the supply of fuel is not possible becomes uniform.

Abstract: Rotation recognition means for recognizing a revolution of a crankshaft based on the cylinders before the combustion cycle of a cylinder in question is provided. When the supply of fuel by injection from an injector to a certain cylinder of the six cylinders has become impossible, then control is performed to change the number of cylinders targeted by the rotation recognition means so as to recognize the revolution of the crankshaft for all six cylinders whose combustion cycles are consecutive prior to the combustion cycle of the cylinder in question, and to stop the supply of fuel from the injectors for supplying fuel to cylinders whose combustion cycles are equally spaced from the cylinder to which the supply of fuel is not possible, so that the spacing between the combustion cycles in the cylinders whose combustion cycles come before and after and sandwich the cylinder to which the supply of fuel is not possible becomes uniform.

Abstract: In one embodiment, the high-pressure pump (8) for providing a pressurized supply of fuel in an engine furnished with a common rail type fuel injection apparatus is provided with two actuators (88, 89). Of these actuators (88, 89), one (88) is stopped and the operation for providing a pressurized supply of fuel is performed from only the other actuator (89), so that the timing at which the load torque that acts on the crankshaft of the engine becomes a local maximum and the timing at which the load torque that acts on the driveshaft of the high-pressure pump (8) becomes a local minimum are made to coincide with one another.

Abstract: A fuel injection start timing is determined based on the engine revolution or the engine load, and a common rail pressure is detected simultaneous to this fuel injection start timing. The fuel injection duration is then calculated based on the detected value of the common rail pressure. By doing this, it is possible to obtain a fuel injection duration that is suited for the common rail pressure at the actual fuel injection start time, resulting in an appropriate injection amount.

Abstract: A fuel injection device of a diesel engine capable of smoothly starting the diesel engine to match an environment around the engine by saving a fuel, reducing the exhaustion of carbon dioxide, and suppressing black smoke in starting the diesel engine. A rack (45) is operated by an actuator (41) from a lowest rack position to a starting increased fuel amount position at a lower speed than that at which the rack is operated by the actuator from the lowest rack position to the starting increased fuel amount position at the maximum operating speed. The operating speed of the rack (45) is set in two stages, and the later operating speed of the rack is reduced less than the operating speed of the rack up to a set intermediate rack target value P2. Then, the operating amount of the rack (45) per hour is reduced after the ignition of the engine (1) is recognized. Also, the operating speed of the rack (45) is controlled according to an atmospheric temperature in starting the engine.

Abstract: An engine revolution in an expansion stroke of a cylinder is calculated, and stored, from a time that is required for a crank shaft to rotate by a predetermined angle from a compression upper dead center of that cylinder, and to determine the fuel injection amount, in averaging these stored revolutions from the cylinder immediately prior to a cylinder before the cylinder that is immediately prior to obtain a revolution that serves as the engine revolution, how many past cylinders are retroactively averaged is switched according to the engine operation state.

Abstract: Rotation recognition means for recognizing a revolution of a crankshaft based on the cylinders before the combustion cycle of a cylinder in question is provided. When the supply of fuel by injection from an injector to a certain cylinder of the six cylinders has become impossible, then control is performed to change the number of cylinders targeted by the rotation recognition means so as to recognize the revolution of the crankshaft for all six cylinders whose combustion cycles are consecutive prior to the combustion cycle of the cylinder in question, and to stop the supply of fuel from the injectors for supplying fuel to cylinders whose combustion cycles are equally spaced from the cylinder to which the supply of fuel is not possible, so that the spacing between the combustion cycles in the cylinders whose combustion cycles come before and after and sandwich the cylinder to which the supply of fuel is not possible becomes uniform.

Abstract: A fuel injection start timing is determined based on the engine revolution or the engine load, and a common rail pressure is detected simultaneous to this fuel injection start timing. The fuel injection duration is then calculated based on the detected value of the common rail pressure. By doing this, it is possible to obtain a fuel injection duration that is suited for the common rail pressure at the actual fuel injection start time, resulting in an appropriate injection amount.

Abstract: An engine revolution in an expansion stroke of a cylinder is calculated, and stored, from a time that is required for a crank shaft to rotate by a predetermined angle from a compression upper dead center of that cylinder, and to determine the fuel injection amount, in averaging these stored revolutions from the cylinder immediately prior to a cylinder before the cylinder that is immediately prior to obtain a revolution that serves as the engine revolution, how many past cylinders are retroactively averaged is switched according to the engine operation state.

Abstract: In collecting fuel pressure data in a common rail 2 during engine operation, the common rail fuel pressure is detected each time a crank shaft rotates 6°, and the common rail fuel pressure is stored in storage means 12 by associating the common rail fuel pressure with a cylinder number and a crank angle for tabulation, thus providing improved detection data accuracy.

Abstract: In one embodiment, the high-pressure pump (8) for providing a pressurized supply of fuel in an engine furnished with a common rail type fuel injection apparatus is provided with two actuators (88, 89). Of these actuators (88, 89), one (88) is stopped and the operation for providing a pressurized supply of fuel is performed from only the other actuator (89), so that the timing at which the load torque that acts on the crankshaft of the engine becomes a local maximum and the timing at which the load torque that acts on the driveshaft of the high-pressure pump (8) becomes a local minimum are made to coincide with one another.

Abstract: The present invention includes first signal set determining means 35 for determining a signal set to be a first signal set when determination by first determining means 33 of a crank angle detecting signal determining means for every one rotation and determination by second determining means 34 of a cam angle detecting signal for every one rotation are performed within a predetermined angle; second signal set determining means 36 for determining a signal set to be a second signal set when determination of a crank angle detecting signal for every one rotation and determination by the second determining means of a cam angle detecting signal corresponding to a cylinder are performed within a predetermined angle, and count reference determining means 37 for determining a cylinder number corresponding to the first or the second signal when signal sets are determined to be the first, the second and the first signal set or the second, the first, and the second signal set sequentially in this order, and also determin

Abstract: The present invention includes first signal set determining means 35 for determining a signal set to be a first signal set when determination by first determining means 33 of a crank angle detecting signal determining means for every one rotation and determination by second determining means 34 of a cam angle detecting signal for every one rotation are performed within a predetermined angle; second signal set determining means 36 for determining a signal set to be a second signal set when determination of a crank angle detecting signal for every one rotation and determination by the second determining means of a cam angle detecting signal corresponding to a cylinder are performed within a predetermined angle, and count reference determining means 37 for determining a cylinder number corresponding to the first or the second signal when signal sets are determined to be the first, the second and the first signal set or the second, the first, and the second signal set sequentially in this order, and also determin

Abstract: In collecting fuel pressure data in a common rail 2 during engine operation, the common rail fuel pressure is detected each time a crank shaft rotates 6°, and the common rail fuel pressure is stored in storage means 12 by associating the common rail fuel pressure with a cylinder number and a crank angle for tabulation, thus providing improved detection data accuracy.