摘要:
According to the present invention, when means is provided for correcting a shift in phase of an engine rotation pulse and a dispersion in responses of an electromagnetic spill valve, and a control signal to a fuel injection pump is corrected in response to an output from the correcting means, if abnormality of output from the correcting means is detected, then the control signal to the fuel injection pump is corrected by use of a fixed valve. As a consequence, even when the output from the correcting means is abnormal, neither excessively large nor excessively small correction is performed and the running at the lowest level can be made, preventing the diesel smoke from being deteriorated and the engine from being damaged.
摘要:
In determining an optimum target fuel ignition timing in accordance with the engine operating conditions, including at least an engine load and an engine speed, the target ignition timing is determined on the basis of a corrected engine load and a corrected engine speed. The corrected engine load and corrected engine speed are obtained by making corrections, according to the engine operating conditions, to a detected engine load and a detected engine speed, respectively. In this way, the optimum target fuel ignition timing according to the engine operating conditions can be obtained without directly detecting a fuel injection quantity.
摘要:
In controlling a time period of energization of a high pressure electromagnetic valve (50) in accordance with a target value of a fuel injection quantity determined from at least an engine speed (Ne) and an engine load, when a target indicated value (theta) of the time period of energization determined from at least the engine speed and the engine load is lower than a zero indicated value (theta.sub.0) of the time period of energization when the fuel injection quantity becomes zero, which is determined from the engine speed, the energization of the high pressure electromagnetic valve is cut off. Therefore, the duty cycle of the high pressure electromagnetic valve is decreased thereby increasing the reliability of the valve. In addition, fuel is reliably cut off when the fuel injection quantity is 0 mm.sup.3 /st thus avoiding fuel leakage and preventing the generation of white exhaust smoke. Fuel economy can therefore be improved.
摘要:
In effecting individual cylinder fuel injection control in an electronically controlled diesel engine, wherein rpm variations with every explosion cylinder are detected and compared with one another, and a fuel injection quantity control actuator is controlled with every cylinder so as to make the rpm variations of respective cylinders uniform, so that engine vibrations due to a dispersion in fuel injection quantity between the cylinders can be controlled, a movement value corrected driving command timing to the fuel injection quantity control actuator is determined in accordance with a difference between individual cylinder correction quantities of last time and this time and a driving command is given to the fuel injection quantity control actuator with every cylinder in accordance with the movement value corrected driving command timing.
摘要:
In effecting individual cylinder fuel injection quantity control in an electronically controlled diesel engine, wherein rpm variation with every explosion cylinder is detected, and a fuel injection quantity spill control actuator is controlled with every cylinder so as to eliminate a dispersion in rpm variation between the cylinders, so that engine vibrations due to the dispersion in fuel injection quantity between the cylinders can be reduced, timing of a control command to the fuel injection quantity spill control actuator is determined in accordance with engine speed and engine load to avoid both a delay in control to a cylinder to be corrected and interference with the injection of fuel to a cylinder immediately before the cylinder to be corrected, and a control command for every cylinder is given to the fuel injection quantity spill control actuator at the determined timing.
摘要:
In determining the maximum injection timing most suitable for the time when the fuel injection reaches the maximum quantity at least as commensurate to an engine speed and an intake air pressure, the basic maximum injection timing most suitable for the time when the fuel injection reaches the maximum quantity under the atmospheric pressure as commensurate to an engine speed, and the basic maximum injection timing is corrected at least by an intake air pressure to provide the maximum injection timing, so that the maximum injection timing can be directly determined from an engine speed and an intake air pressure without determining the basic maximum injection quantity and the maximum injection quantity.
摘要:
In effecting individual cylinder fuel injection control in an electronically controlled diesel engine, wherein rpm variations with every explosion cylinder are detected and compared with one another, the increase or decrease in the fuel injection quantity with every cylinder is learned until rpm variations of the respective cylinders become uniform, and a fuel injection quantity control actuator is controlled with every cylinder, so that engine vibrations due to a dispersion in fuel injection quantity between the cylinders can be controlled, an adaptive correction quantity is determined in accordance with an rpm variation deviation obtained from a difference between a mean rpm variation and rpm variations of the respective cylinders, and the engine temperature or the fuel temperature, and the fuel injection quantity control actuator is controlled with every cylinder in accordance with the adaptive correction quantity, to thereby prevent the divergence of the correction quantity.
摘要:
At least not less than one capacitor formation trench providing an uneven surface is formed on the surface of a capacitor formation region. Thus, the surface area of a capacitor is increased, which enables improvement of the capacitance of the capacitor per unit area. Further, by forming the capacitor formation trench and an element formation trench that are formed in the surface of the semiconductor substrate by the same step, it is possible to simplify the manufacturing process. Whereas, a dielectric film of the capacitor in the capacitor formation region and a high-voltage gate insulating film in a MISFET formation region are formed by the same step; alternatively, the dielectric film of the capacitor in the capacitor formation region and a memory gate interlayer film between a polysilicon layer and a polysilicon layer in the memory cell formation region are formed by the same step.
摘要:
In a method for treating a combustion exhaust gas from a waste burning facility, the exhaust gas has its temperature lowered to 180-230.degree. C., in a temperature lowering unit, is freed of dust in a dry dust collector, passed through a dioxin and NOx removing unit using a vanadium oxide-based catalyst and, thereafter, the exhaust gas at 180-230.degree. C. is further passed through a heat exchanger to effect heat recovery. The vanadium oxide-based catalyst is a vanadium oxide alone or the combination thereof either with an oxide of at least one element selected from the group consisting of molybdenum, tin, yttrium, boron and lead or with gold. In addition, a tungsten oxide may be used. These catalysts are preferably carried on titania for use. The method and an apparatus for implementing it require a simple system configuration and yet assure high thermal efficiency while achieving efficient removal of dioxins and nitrogen oxides.
摘要:
An air-fuel ratio control device for an vehicle engine, by which the air-fuel ratio of the air-fuel mixture supplied to a vehicle engine is changed. The device sets the air-fuel ratio to a lean mixture when the engine coolant temperature is higher than a predetermined value and the vehicle speed is higher than a value determined by a time elapsed after engine startup.