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Now showing items 1 - 14 of 14

  • DEVICE FOR CONTROLLING WATER PURIFICATION SYSTEM

    The present invention addresses the problem of suppressing the execution of a filter regeneration process in conditions that could induce an excessive temperature increase in a particulate filter, when there is a discrepancy between the amount of PM sediment determined by an ECU and the actual amount of PM sediment, as a result of an action such as replacing the ECU or the particulate filter. In order to overcome this problem, it is assumed in the present invention that a value measured by a differential pressure sensor is a value for when only PM has accumulated in a particulate filter when the difference between an estimated amount of PM sediment estimated from the operation history for an internal combustion engine and the amount of PM sediment calculated from the value measured by the differential pressure sensor is equal to or greater than a threshold value. If the measured value is equal to or less than a prescribed upper limit value, a first regeneration process is executed, which is a process of oxidizing and removing PM accumulated in the particulate filter, and if the measured value is greater than the prescribed upper limit value, a second regeneration process is executed without executing the first regeneration process.
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  • CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

    At least an abnormal state of a filter is accurately avoided when PM collected in the filter is oxidized and removed by fuel cut processing in an internal combustion engine of a spark ignition system. The air is supplied at a usual air flow rate into the filter by stopping fuel injection in the internal combustion engine and setting the opening degree of a throttle valve to a predetermined value, and the particulate matter collected in the filter is oxidized and removed. In a case where an estimated reached temperature which is the temperature, to which a temperature of the filter is estimated to be reached, when the oxidation and removal of the particulate matter are performed at the usual air flow rate is determined to exceed a predetermined abnormality determination temperature associated with the abnormal state of the filter, the flow rate of air which actually flows into the filter when the oxidation and removal of the particulate matter are performed is reduced to a temperature-increase-suppression flow rate which is less than the usual air flow rate.
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  • EXHAUST GAS PURIFICATION APPARATUS FOR AN INTERNAL COMBUSTION ENGINE

    An opportunity for carrying out regeneration of a filter is increased. A valve timing changing device is operated in such a manner that in cases where a pressure in an intake passage of an internal combustion engine is higher than a pressure in an exhaust passage of the internal combustion engine, an amount of air passing from the intake passage to the exhaust passage through a cylinder becomes larger when an amount of particulate matter deposited on the filter is equal to or larger than a predetermined amount, than when the amount of particulate matter deposited on the filter is less than the predetermined amount.
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  • CONTROL OF REGENERATION OF A PARTICULATE FILTER OF EXHAUST GAS

    An exhaust gas purification apparatus of an internal combustion engine is provided with a filter that collects PM in exhaust gas, a first accumulation amount obtaining unit that obtains an accumulation amount of PM (Mpm at S201), a second accumulation amount obtaining unit that obtains an accumulation amount of ash (Mash at S201) and a control unit that executes a regeneration process to oxidize the accumulated PM, wherein, in a case (at S202) where the accumulation amount of ash (Mash) is equal to or larger than a threshold amount (Ma), the control unit executes the regeneration process provided (at S401) the accumulation amount of PM (Mpm) is in a state where it has reached a first predetermined amount (Mpmt of S206) which is an amount to raise a filter temperature (current temperature Tc) to a temperature (target temperature Tt) by oxidation heat generated by the regeneration process, the temperature (Tt) being a temperature at which the accumulated ash contracts, i.e. the incombustible matter increases density and decreases volume at >750-1050°C in order to reduce back pressure of the filter.
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  • EXHAUST PURIFICATION DEVICE OF INTERNAL COMBUSTION ENGINE

    The purpose of the invention is to increase the opportunities for a filter to be regenerated. Provided is an exhaust purification device of a spark-ignition internal combustion engine, comprising a catalyst in an exhaust passage of the internal combustion engine, a filter, and a control device for inhibiting fuel cuts when thermal degradation of the catalyst is predicted should a fuel cut be carried out; wherein when filter regeneration, which is a process for removing particulate matter collected in the filter, is required, the control device carries out a fuel cut even when thermal degradation of the catalyst is predicted.
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  • CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE

    The purpose of the present invention is to increase the opportunities for a filter to be regenerated while reducing the amount of NOx emission. After a request is made to stop an internal combustion engine, but before the internal combustion engine is stopped, a partial-cylinder stop process of stopping fuel supply to some cylinders and continuing fuel supply to the other cylinders for combustion is performed, followed by a full-cylinder stop process of stopping fuel supply to all of the cylinders to stop the internal combustion engine.
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  • FUEL SUPPLY DEVICE FOR INTERNAL COMBUSTION ENGINE

    In order to quickly supply vaporized fuel into cylinders even during a cold start, and in order to increase startability, the disclosed engine (10) is provided with a regular fuel tank (32), a vaporized fuel tank (34), an in-tank injection valve (36), a vaporized fuel supply valve (38), and the like. While the engine is running, in the state where the vaporized fuel supply valve (38) is closed, fuel is injected from the in-tank injection valve (36) into the vaporized fuel tank (34), forming vaporized fuel, which is this fuel that has vaporized. The vaporized fuel stored in the vaporized fuel tank (34) retains the state of a vapor phase by means of natural depressurization even after the engine is stopped. When starting the engine, the vaporized fuel within the vaporized fuel tank (34) is supplied to a surge tank (20) by means of opening the vaporized fuel supply valve (38). As a result, compared with generating vaporized fuel during starting, vaporized fuel can be supplied into the cylinders quickly, and startability can be increased.
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  • FUEL INJECTION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

    A fuel injection control device (electronic control device (1)) for an internal combustion engine can cause first to fourth fuel injection valves (54a-54d) of the engine to inject fuel (F) heated after being delivered from a fuel pump (feed pump (52)). The injection valves (54a-54d) are provided respectively on cylinders of the engine and are connected to a fuel delivery pipe (53). The fuel injection control device has fuel pump control means for stopping drive of the fuel pump (feed pump (52)) until the amount of the heated fuel (F) in the fuel delivery pipe (53) is less than or equal to a predetermined level.
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  • MULTI-FUEL INTERNAL COMBUSTION ENGINE

    This invention provides a multi-fuel internal combustion engine. The multi-fuel internal combustion engine is operated by leading a single low-boiling point component fuel and at least one fuel different from the single low-boiling point component fuel in properties either each solely or together to a combustion chamber (CC). The multi-fuel internal combustion engine comprises lubricating oil temperature detecting means (temperature sensor (91)) for detecting the temperature of a lubricating oil or lubricating oil temperature estimating means for estimating the temperature of the lubricating oil, and purge control means (electronic control unit (1)) which, when the temperature of the detected or estimated lubricating oil is around the boiling temperature of the single low-boiling point component fuel, prohibits purge control by an evaporation gas purge apparatus (comprising an evaporation gas passage (42), a check valve (43), a canister (44), and an opening/closing valve (45)), or reduces the purge flow rate of the evaporation gas in the purge control.
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  • CONTROL APPARATUS AND METHOD OF CONTROLLING INTERNAL COMBUSTION ENGINE MOUNTED ON VEHICLE

    An idle speed control apparatus for an internal combustion engine of a vehicle to adjust an engine speed to a target engine speed set in accordance with a magnitude of a drive request value for an auxiliary driven by the engine when a speed of the vehicle is below a predetermined speed to idle the engine, that reduces the drive request value for the auxiliary when executing the idle speed control, and that reduces the target engine speed by a value equivalent to a reduction in the drive request value after lapse of a prescribed delay time from a time point corresponding to start of reduction of the drive request value, the control apparatus comprising engine speed reduction means for reducing the target engine speed before lapse of the delay time if the vehicle is traveling on a road surface with low friction coefficient.
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  • CONTROL APPARATUS AND METHOD OF CONTROLLING INTERNAL COMBUSTION ENGINE MOUNTED ON VEHICLE

    When an engine shifts to idle operation in a process of stopping an automobile, a target engine speed of an engine idle speed control is reduced and a threshold engine speed of an engine speed reduction prevention control is also reduced accordingly, provided that the automobile is traveling on a road surface with low friction coefficient.
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  • DEVICE FOR DETECTING INTER-CYLINDER AIR-FUEL RATIO IMBALANCE IN MULTI-CYLINDER INTERNAL COMBUSTION ENGINE

    Provided is a device for detecting an inter-cylinder air-fuel ratio imbalance in a multi-cylinder internal combustion engine. This device is equipped with: a supercharger installed in connection with a multi-cylinder internal combustion engine; a bypass passage that bypasses the turbine of the supercharger; a waste gate valve that opens/closes the bypass passage; an air-fuel ratio sensor installed in a portion of the exhaust passage of the multi-cylinder internal combustion engine downstream from the convergence point of the downstream side of the turbine and the downstream side of the bypass passage; and a determination unit programmed so as to determine an imbalance in the air-fuel ratio between the cylinders, by comparing the degree of variation in the output of the air-fuel ratio sensor, or a parameter value correlated therewith, with a prescribed threshold value. The determination unit is programmed so as not to perform a determination of an imbalance in the air-fuel ratio between the cylinders when the degree of opening of the waste gate valve is equal to or greater than a prescribed standard degree of opening.
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  • DEVICE FOR DETECTING INTER-CYLINDER AIR-FUEL RATIO VARIATION ERROR IN MULTICYLINDER INTERNAL COMBUSTION ENGINE

    Provided is a device for detecting inter-cylinder air-fuel ratio variation error in a multicylinder internal combustion engine, said device being equipped with: a wastegate passage (26) that bypasses a turbine (25b) of a supercharger (25); a wastegate valve (27) that opens/closes the wastegate passage (26); an air-fuel ratio sensor (17) arranged in the exhaust air passage farther downstream than the exit of the wastegate passage (26); an error detection means that detects inter-cylinder air-fuel ratio variation error by comparing a parameter value that correlates with the degree of deviation in the output from the air-fuel ratio sensor (17) to a prescribed error threshold value; and an exhaust acceleration means that accelerates the exhaust flow. The device also is equipped with a controller (22) that controls the wastegate valve (27) and the exhaust acceleration means, and when an inter-cylinder air-fuel ratio variation error is detected the controller (22) opens the wastegate valve (27) and causes the exhaust acceleration means to accelerate the exhaust flow.
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  • CONTROL APPARATUS AND METHOD FOR INTERNAL COMBUSTION ENGINE AND FUEL PROPERTY DETERMINING APPARATUS AND METHOD

    A fuel feed chamber (19f) and a residual fuel chamber (19r) that are connectable to each other via a shutoff valve (20) are provided in a fuel tank (19). When the fuel tank (19) is refueled, the fuel feed chamber (19f) and the residual fuel chamber (19r), which have been connected to each other so far, are disconnected and then fuel is fed only into the fuel feed chamber (19f) to refuel the fuel tank (19). When the engine is restarted after the refueling, only the fuel in the residual fuel chamber (19r) is supplied to the engine while the fuel feed chamber (19f) and the residual fuel chamber (19r) remain disconnected from each other, and the engine is controlled in accordance with the property of the fuel in the residual fuel chamber (19r), which has been determined in advance.
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