Patent application number | Description | Published |
20090133388 | Exhaust gas purification apparatus and exhaust gas purification method - An exhaust gas purification apparatus which is installed in a flow channel of an exhaust gas discharged from an engine, includes: a first purification device that purifies one component contained in the gas; a heating device that heats the purification device to a predetermined temperature in a period from before the engine is started to a first point in time that is after the engine is started; control device that controls an air-fuel ratio of the gas so as to obtain a air-fuel ratio suitable for purifying the one component in a period from the time when the engine is started to a point in time that is on or after a time at which the purification device is heated to the predetermined temperature; and an adsorption device that communicates with the downstream of the first purification device and adsorbs another component contained in the gas. | 05-28-2009 |
20100199754 | MALFUNCTION DIAGNOSIS DEVICE FOR EXHAUST GAS PURIFICATION SYSTEM AND MALFUNCTION DIAGNOSIS METHOD THEREFOR - In a malfunction diagnosis device for an exhaust gas purification system including an exhaust gas purification catalyst disposed in the exhaust passage of an internal combustion engine, and a reductant supply device that supplies reductant to exhaust gas that flows in an upstream side of the exhaust gas purification catalyst, the degree of degradation of the exhaust gas purification catalyst is diagnosed by comparing the timing at which the bed temperature of the exhaust gas purification catalyst starts to rise due to the heat of moisture adsorption reaction, against a normal value. | 08-12-2010 |
20110132327 | ABNORMALITY DETECTION DEVICE FOR INTERNAL COMBUSTION ENGINE - An object of the present invention is to provide an abnormality detection device that is used with an internal combustion engine having a valve drive mechanism capable of halting the drive of at least one of an intake valve and an exhaust valve, and able to detect the abnormalities of a valve drive halt function. The internal combustion engine includes a knock sensor capable of sensing the seating sound of the intake valve and/or the exhaust valve. An ECU detects whether a control signal given to the valve drive mechanism is a valve drive signal or a valve halt signal. In accordance with the result of detection by the ECU and the presence of the seating sound in an output of the knock sensor, the abnormality detection device judges whether or not the valve drive mechanism is abnormal. | 06-09-2011 |
20110215813 | FUEL PROPERTY SENSOR ABNORMALITY DETERMINING DEVICE - A plurality of capacitance values at different obtained fuel temperatures are obtained. Ethanol concentrations of fuel to be measured are obtained from these capacitance values after correcting for an amount of change in the capacitance values due to a temperature characteristic. The correction according to the temperature characteristic is realized according to a map stored in a control apparatus. It is determined that there is an abnormality in an alcohol concentration sensor if the difference among the obtained ethanol concentrations is equal to or greater than a predetermined value. | 09-08-2011 |
20110264357 | CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE AND CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE - A control apparatus for an internal combustion engine includes: a fuel property sensor which is provided between a fuel tank and a delivery pipe and which detects a component ratio of fuel; a fuel property value calculator that calculates an injector fuel property value for each cylinder using the component ratio detected by the fuel property sensor a period of time ago, which is equal to an amount of time required for the fuel to travel from the fuel property sensor to each fuel injector, as a value corresponding to the present component ratio of the fuel near the corresponding injector; and an engine-restart-time fuel injection amount calculator that calculates a fuel injection amount for each cylinder based on an engine-off duration in a case where the internal combustion engine is restarted after the internal combustion engine is stopped when the injector fuel property value varies from cylinder to cylinder. | 10-27-2011 |
20110276250 | CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE INCLUDING VARIABLE VALVE OPERATING MECHANISM - The present invention has its object to provide a control apparatus for an internal combustion engine including a variable valve operating mechanism which is capable of accurately and effectively identifying an abnormality-occurring cylinder during operation while preventing the deterioration of a catalyst. A fuel injection valve which is capable of injecting fuel for each cylinder is provided. Variable valve operating mechanisms which are capable of halting the operation of the intake and exhaust valves in the closed state for each cylinder are provided. An abnormality evaluation index value is acquired during the operation of the internal combustion engine and, based on the abnormality evaluation index value, an abnormality which has occurred in at least one cylinder in the internal combustion engine is detected. When the abnormality is detected, a cylinder halting to perform the halting of fuel supply and the halting of the valve operation in the closed state is executed with a first partial cylinder made up of at least two cylinders as the target. After the cylinder halting, with the cylinder to be halted being changed, a cylinder halting is executed with a second partial cylinder made up of at least one cylinder as the target. Based on the change in the abnormality evaluation index value associated with the changing of the cylinder to be halted, the abnormality-occurring cylinder is identified. | 11-10-2011 |
20110313642 | CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE INCLUDING VARIABLE VALVE OPERATING MECHANISM - Provided is a control apparatus, which can successfully suppress that deterioration of combustion is caused in response to inflow of a large amount of blow-by gas to cylinders at the time of a valve return from a valve stop state in an internal combustion engine including a positive crankcase ventilation system and a variable valve operating mechanism that is capable of stopping at least one valve of an intake valve and exhaust valve in a closed state. A valve stop control is performed which stops the intake valve and exhaust valve in a closed state when a fuel cut of the internal combustion engine is executed. A deviation amount ΔA/F between a predetermined target air fuel ratio and an actual air fuel ratio detected by an A/F sensor at the time of a valve return is obtained. A correction is performed to decrease a fuel injection amount by a fuel amount equivalent to the deviation amount ΔA/F at the time of the subsequent valve returns. | 12-22-2011 |
20120103312 | CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE - An object of the present invention is to avoid an air-fuel ratio difference between cylinders upon recovery from a cylinder deactivation in a situation where some of a plurality of cylinders of an internal combustion engine capable of using a plurality of types of fuels having different properties are to be deactivated upon the halt of fuel injection from an injector. | 05-03-2012 |
20120227707 | FUEL SUPPLY SYSTEM OF INTERNAL COMBUSTION ENGINE - A fuel supply system of an internal combustion engine includes: a pressure adjustment device provided on a fuel flow path that connects a fuel pump and an injector; a return flow path for returning a fuel discharged from the pressure adjustment device to a fuel tank; a fuel property sensor disposed in the return flow path; a fuel pump control portion that actuates the fuel pump at a predetermined programmed timing, when the internal combustion engine is in a stopped state; and a fuel property determination portion that determines a fuel property of the fuel in the fuel tank by using an output value of the fuel property sensor, when the fuel pump is actuated during the stopped state of the internal combustion engine. | 09-13-2012 |
20130019651 | ABNORMALITY DETECTION APPARATUS FOR FUEL PROPERTY DETECTION APPARATUS - An object of the present invention is to accurately diagnose an abnormality of a fuel property detection apparatus that detects a fuel property based on a capacitance between electrodes. The abnormality detection apparatus for a fuel property detection apparatus of the present invention detects an abnormality of a fuel property detection apparatus that detects a fuel property based on a measurement value of a capacitance between a pair of electrodes installed on a fuel supply channel of an internal combustion engine that can use a fuel that includes a predetermined fuel component that has a characteristic such that a permittivity thereof changes according to a frequency of an electric field. The abnormality detection apparatus for a fuel property detection apparatus includes frequency switching means that switches a frequency of an alternating voltage applied between both electrodes to a plurality of frequencies, measuring means that measures a capacitance at each of the plurality of frequencies, storing means that stores frequency characteristics information that is information relating to a relationship between a fuel property and frequency characteristics of capacitances when the fuel property detection apparatus is normal, and diagnosing means that diagnoses an abnormality of the fuel property detection apparatus based on a measurement result of the measuring means and the frequency characteristics information. | 01-24-2013 |
20130019669 | APPARATUS FOR DETECTING ABNORMALITY FOR FUEL PROPERTY DETECTING APPARATUS - The present invention aims at providing an apparatus for detecting abnormality capable of accurately detecting whether or not there is an abnormality in a fuel property detecting apparatus. | 01-24-2013 |
20130068965 | BIOFUEL DEGRADATION SENSOR BASED ON FLUORESCENCE MEASUREMENTS - A sensor that detects a fuel property of a mixed fuel of a biofuel and a hydrocarbon fuel includes: a light emitting device that emits light with a wavelength of 250 nm to 400 nm onto the mixed fuel; and a light receiving device that receives light emitted by the mixed fuel under the effect of light from the light emitting device and generates an output corresponding to the received light. When the fuel property is determined, in a case where the mixed fuel is irradiated by light with a predetermined wavelength generated due to voltage application to the light emitting device, the light emitted by the mixed fuel is detected by the light receiving device. The fuel property of the mixed fuel is detected according to the detected light. | 03-21-2013 |
20130263824 | ABNORMALITY DETECTION DEVICE FOR INTERNAL COMBUSTION ENGINE - An object of the present invention is to provide an abnormality detection device that is used for an internal combustion engine whose operation is controlled in accordance with the properties of employed fuel, and capable of accurately detecting an abnormality in a fuel property sensor used to determine the fuel properties, and more particularly, a stuck fuel property sensor. The abnormality detection device is configured so that a measurement section of the fuel property sensor is housed in a fuel container, which is not disposed in a main flow path of a fuel flow path connecting a fuel pump to an injector, but is disposed apart from the main flow path. The fuel drawn from a fuel tank is introduced into the fuel container. The resulting output value of the fuel property sensor is acquired as a first sensor output value. Further, the fuel is discharged from the fuel container. The resulting output value of the fuel property sensor is acquired as a second sensor output value. The first and second sensor output values are then used as the information for abnormality judgment to check for an abnormality in the fuel property sensor. | 10-10-2013 |
20130340496 | RATIONALITY DIAGNOSTIC DEVICE FOR ALCOHOL CONCENTRATION SENSOR - A rationality diagnostic device for an alcohol concentration sensor includes a capacitance-type remaining fuel amount sensor as a remaining fuel amount sensor disposed in a fuel tank. The capacitance-type remaining fuel amount sensor has such output characteristics that its output value is determined by the amount of fuel remaining in the fuel tank and the alcohol concentration of the fuel. The rationality diagnostic device corrects the output value of the remaining fuel amount sensor in accordance with the output value of the alcohol concentration sensor to eliminate an alcohol-concentration-dependent component from the output value of the remaining fuel amount sensor. The rationality diagnostic device then verifies the accuracy of the corrected output value of the remaining fuel amount sensor to judge whether the rationality of the alcohol concentration sensor is maintained. | 12-26-2013 |
20150040652 | INTAKE AIR VOLUME MEASURING DEVICE FOR INTERNAL COMBUSTION ENGINE - Disclosed is an intake air volume measuring device for an internal combustion engine. The device includes an air flow meter located in an intake air path of the internal combustion engine, to measure the volume of intake air into the combustion chamber of the internal combustion engine based on an output signal of the air flow meter. The output signal of the air flow meter (AFM signal) is sampled in synchronism with the crank angle of the internal combustion engine. With this angle-synchronous processing, the device is capable of obtaining AFM data at equal intervals within a cycle of intake air pulsation, thereby eliminating adverse effects of the intake air pulsation. The device is hence capable of reducing variations in AFM data averages and calculating average flow rates of the intake air with high precision. | 02-12-2015 |