Patent application number | Description | Published |
20090063016 | INJECTION CONTROL DEVICE OF INTERNAL COMBUSTION ENGINE - A fuel injection control device (ECU) for controlling injection supply of fuel to an engine is applied to an injector that has a valve body formed with a fuel injection hole, a needle accommodated in the valve body for opening and closing the injection hole, and a piezoelectric element for driving the needle such that the needle reciprocates and that can continuously adjust an injection rate in accordance with an injection command signal to the piezoelectric element. The fuel injection control device senses a fuel pressure waveform indicating a transition of fuel pressure fluctuation accompanying a predetermined injection of the injector based on an output of a fuel pressure sensor and calculates an injection command signal for approximating a predetermined injection parameter concerning the predetermined injection to a reference value of the parameter based on the sensed fuel pressure waveform. | 03-05-2009 |
20090082940 | INTERNAL COMBUSTION ENGINE CONTROL DEVICE - A control device of an internal combustion engine calculates a rotation increase amount caused in connection with a small injection based on a sensing value of a crank angle sensor and calculates an actual torque increase amount based on the calculated rotation increase amount. The control device senses fuel pressure fluctuation caused in connection with the small injection with a pressure sensor and calculates an actual injection quantity based on the sensed fuel pressure fluctuation. Then, the control device calculates a combustion rate by comparing the actual torque increase amount and the actual injection quantity and changes data (an injection pattern) of an injection control map in accordance with the combustion rate to achieve desired output torque and emission state. | 03-26-2009 |
20090082941 | CONTROLLER FOR FUEL INJECTION SYSTEM - A fuel pressure sensor is provided to each fuel injector respectively and is disposed in a fuel passage between the accumulator and a fuel injection port of the fuel injector in such a manner as to be close to a fuel injection port relative to the accumulator. Output values of a plurality of fuel pressure sensors are acquired, and an average of the output values is computed. The output values are corrected in such a manner as to agree with the average. | 03-26-2009 |
20090084356 | CONTROLLER FOR ACCUMULATOR FUEL INJECTION SYSTEM - A common-rail fuel injection system is equipped with a common-rail, a fuel pump | 04-02-2009 |
20090084357 | FUEL-SUPPLY QUANTITY ESTIMATING APPARATUS AND FUEL INJECTION SYSTEM - A variation waveform of fuel pressure is obtained by use of a fuel pressure sensor which detects pressure of fuel supplied to an injector. A quantity of fuel supplied to the injector is estimated based on a waveform of the detected pressure that is greater than a reference value due to a fuel pumping, in the obtained variation waveform. Especially, in a case that the fuel pressure sensor is provided to each of a plurality of injectors, it is desirable to obtain the variation waveform based on the output of the fuel pressure sensor provided to a cylinder in which no fuel injection is currently performed. | 04-02-2009 |
20090088951 | DEFECTIVE INJECTION DETECTION DEVICE AND FUEL INJECTION SYSTEM HAVING THE SAME - A pressure sensor is located in a fuel passage, which extends from a pressure-accumulation vessel to a nozzle hole of a fuel injection valve. The pressure sensor is located closer to a nozzle hole than the pressure-accumulation vessel for detecting pressure fluctuated by injection of fuel through the nozzle hole. An instruction signal output unit outputs an injection instruction signal so as to instruct an injection mode of fuel to the fuel injection valve. A defective injection determination unit determines whether a detected pressure of the fuel pressure sensor is fluctuated in a fluctuation mode in a range assumed from the injection instruction signal. The defective injection determination unit determines that a defective injection occurs when determining that the detected pressure is out of the fluctuation mode in the assumed range. | 04-02-2009 |
20090107225 | CYLINDER CHARACTERISTIC VARIATION SENSING DEVICE - A cylinder characteristic variation sensing device has a small injection controlling section that performs small injections sequentially in respective cylinders, a torque increase amount sensing section that senses an increase amount of output torque caused in connection with the small injection for each cylinder, an injection quantity sensing section that senses an actual injection quantity of the small injection for each cylinder, and a cylinder characteristic variation calculating section that calculates a variation in a cylinder characteristic among the cylinders (i.e., a cylinder characteristic variation) based on a variation in the sensing value of the injection quantity sensing section among the cylinders (i.e., an injection quantity variation) and a variation in the sensing value of the torque increase amount sensing section among the cylinders (i.e. a torque increase amount variation). | 04-30-2009 |
20090107227 | EXHAUST GAS RECIRCULATION DISTRIBUTION VARIATION SENSING DEVICE - An exhaust gas recirculation distribution variation sensing device has a torque sensing section that senses instantaneous torque caused with combustion of fuel injected from an injector for each cylinder, an injection quantity sensing section that senses an actual injection quantity of the injected fuel for each cylinder and an exhaust gas recirculation distribution variation calculating section that calculates an exhaust gas recirculation distribution variation as a distribution variation of recirculated exhaust gas to respective cylinders based on a variation in the torque sensing value of the torque sensing section among the cylinders (i.e., a torque variation) and a variation in the injection quantity sensing value of the injection quantity sensing section among the cylinders (i.e., an injection quantity variation). | 04-30-2009 |
20090112444 | CONTROL DEVICE AND CONTROL SYSTEM OF INTERNAL COMBUSTION ENGINE - An internal combustion engine control device has a cylinder pressure sensor for sensing pressure in a combustion chamber and a fuel pressure sensor for sensing fuel pressure fluctuating in connection with fuel injection from an injector. The control device calculates a combustion characteristic of a cylinder (for example, an ignition delay or a combustion rate) based on both of a cylinder pressure sensing value and a fuel pressure sensing value. The control device corrects an EGR quantity, supercharging pressure, and injection start timing in accordance with the calculated combustion characteristic. Thus, the control device performs cooperative control of the injection start timing (an injection mode), the supercharging pressure and the EGR quantity (intake air conditions) in accordance with the combustion characteristic of the cylinder. | 04-30-2009 |
20090112447 | INTAKE AIR QUANTITY CORRECTING DEVICE - An intake air quantity correcting device calculates an intake air quantity as a sensing target of an airflow meter (an intake air quantity sensor) based on an injection quantity sensing value sensed with a fuel pressure sensor (an injection quantity sensor) and an oxygen concentration sensing value sensed with an A/F sensor (an oxygen concentration sensor). The intake air quantity correcting device regards a difference between the intake air quantity calculation value calculated in this way and an intake air quantity sensing value sensed with the airflow meter as a sensing error of the airflow meter and corrects the intake air quantity sensing value of the airflow meter based on the sensing error. | 04-30-2009 |
20120185155 | INJECTION CONTROL DEVICE OF INTERNAL COMBUSTION ENGINE - A fuel injection control device (ECU) for controlling injection supply of fuel to an engine is applied to an injector that has a valve body formed with a fuel injection hole, a needle accommodated in the valve body for opening and closing the injection hole, and a piezoelectric element for driving the needle such that the needle reciprocates and that can continuously adjust an injection rate in accordance with an injection command signal to the piezoelectric element. The fuel injection control device senses a fuel pressure waveform indicating a transition of fuel pressure fluctuation accompanying a predetermined injection of the injector based on an output of a fuel pressure sensor and calculates an injection command signal for approximating a predetermined injection parameter concerning the predetermined injection to a reference value of the parameter based on the sensed fuel pressure waveform. | 07-19-2012 |