Patent application number | Description | Published |
20080234918 | KNOCKING STATE DETERMINATION DEVICE - An engine ECU executes a program including the steps of: calculating a correlation coefficient K based on the result of comparing a vibration waveform of an engine and a knock waveform model stored previously; calculating a magnitude value LOG(V) from the magnitude V detected based on a signal transmitted from a knock sensor; creating frequency distribution of magnitude values LOG(V) by using magnitude values LOG(V) in an ignition cycle in which the correlation coefficient K larger than a threshold K( | 09-25-2008 |
20110087408 | TORQUE CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE - In a torque control device for an internal combustion engine, a driving-system torque calculation unit calculates a driving-system torque operating on a driving system, based on a requested torque at a time of acceleration. A torque control unit executes torque control so that a gradient of the driving-system torque becomes equal to or smaller than a predetermined value, based on the driving-system torque calculated by the driving-system torque calculation unit. Thereby, since an amount of twist of the driving system can be maintained equal to or smaller than a predetermined value, repetitive shock can be suppressed, and acceleration shock can be effectively suppressed, too. Response deterioration and fuel consumption deterioration at the time of acceleration can be prevented. | 04-14-2011 |
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 |
20110174256 | CONTROL APPARATUS AND CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE - In a startup operation of an internal combustion engine, the internal combustion engine is started by supplying fuel to only a first cylinder group formed of a portion of cylinders, from among a plurality of cylinders that make up the internal combustion engine, when a startup condition of the internal combustion engine has been satisfied, and then fuel starts to be supplied to a second cylinder group formed of the remaining cylinders after the internal combustion engine has started. Meanwhile, in a stopping operation of the internal combustion engine, the internal combustion engine is stopped when a shutoff condition of the internal combustion engine is satisfied, by first stopping the supply of fuel to the second cylinder group and then stopping the supply of fuel to the first cylinder group after the supply of fuel to the second cylinder group has been stopped. | 07-21-2011 |
20110197860 | INTERNAL COMBUSTION ENGINE CONTROLLER - An internal combustion engine is started by performing fuel supply into part of a plurality of cylinders included in the internal combustion engine. After the magnitude of the negative pressure produced in intake piping of the internal combustion engine exceeds a predetermined reference value, fuel supply into the remaining cylinder(s) is started. | 08-18-2011 |
20110203552 | CONTROL APPARATUS AND CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE - A control apparatus for an internal combustion engine starts the internal combustion engine by initiating combustion in cylinders belonging to a first cylinder group, from among a plurality of cylinders that make up the internal combustion engine. The control apparatus monitors a change in an amount of negative pressure generated in an intake pipe when the internal combustion engine is started, and obtains information related to an alcohol concentration of fuel used in the internal combustion engine. The control apparatus also calculates a fuel injection quantity necessary to initiate combustion in cylinders belonging to a second cylinder group, based on the amount of negative pressure generated in the intake pipe and the alcohol concentration of the fuel, and initiates combustion in each cylinder belonging to the second cylinder group when the necessary fuel injection quantity enters a range of quantities that are able to be injected by corresponding injectors. | 08-25-2011 |
20110283684 | CONTROL SYSTEM OF INTERNAL COMBUSTION ENGINE - A control system of an internal combustion engine in which a first fuel of ammonia and a second fuel which is easier to burn than ammonia are used as fuels. An ammonia ratio is usually set to a reference ammonia ratio which is determined in advance in accordance with an operating state of an engine. At the time when feed of the fuel is restarted after suspension of feed of the fuel at the time of deceleration, the ammonia ratio is temporarily made lower than the reference ammonia ratio in accordance with the operating state of the engine. | 11-24-2011 |
20110283959 | AMMONIA BURNING INTERNAL COMBUSTION ENGINE - An ammonia burning internal combustion engine in which, in addition to ammonia, a reformed gas reformed at a reformer is fed into a combustion chamber. When a reforming ability of the reformer is less than a predetermined reforming ability, an ammonia ratio is increased to a ratio more than the ammonia ratio after completion of engine warmup set in advance in accordance with an operation state of the engine, and secondary air is fed from a secondary air feeding device into an engine exhaust passage upstream of an exhaust purification catalyst. | 11-24-2011 |
20130255630 | CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE - A control apparatus for an internal combustion engine that can suppress the emission of unburned HC accompanying start-up of an internal combustion engine. The control apparatus including a fuel supply control unit that initially supplies fuel to only some cylinders, and delays the start of fuel supply to delayed cylinders that are cylinders other than the aforementioned cylinders; an engine discharge gas HC amount predicting unit that calculates a relationship between a delayed cylinder starting engine speed that is a engine speed at a timing at which a cycle starts in which a delayed cylinder initially carries out combustion and a predicted value of an engine discharge gas HC amount; and a target engine speed calculating unit that calculates a target engine speed that is a target value of the delayed cylinder starting engine speed. | 10-03-2013 |
20150128567 | CATALYST PROTECTION DEVICE AND CATALYST PROTECTION METHOD FOR INTERNAL COMBUSTION ENGINE - A catalyst protection device includes: a catalyst provided in an exhaust system of an internal combustion engine and purifying exhaust gas; a bed temperature acquisition unit acquiring a current bed temperature of the catalyst; a base increase value calculation unit calculating a base increase value that is a base value of an increase value of a fuel injection amount injected by a fuel injection valve included in the internal combustion engine in order to cool the catalyst when the current bed temperature exceeds a predetermined determination value; a compensator acquiring a corrected increase value by correcting the base increase value using a reduction coefficient that is calculated by incorporating a value of a target bed temperature set to a value strictly lower than the determination value; and an injection amount increasing unit selecting any one of the base increase value and the corrected increase value. When catalyst protection is required, the fuel increase value is therefore optimized to reasonable values, while not being reduced too much. | 05-14-2015 |
20150135682 | CATALYST PROTECTION DEVICE AND CATALYST PROTECTION METHOD FOR INTERNAL COMBUSTION ENGINE - A catalyst protection device includes: a catalyst provided in an exhaust system of an internal combustion engine; a bed temperature acquisition unit that acquires a bed temperature for each of a plurality of regions of the catalyst distributed in an exhaust gas flow direction; and a fuel injection unit that determines for each of the regions whether an increase in fuel injection amount is required on the basis of the corresponding bed temperature acquired by the bed temperature acquisition unit, that calculates an increase in fuel injection amount for each region and that injects fuel of an amount including the sum of the calculated increase values. | 05-21-2015 |
Patent application number | Description | Published |
20090043484 | METHOD AND DEVICE FOR CONTROL IGNITION TIMING THROUGH KNOCK CONTROL IN AN INTERNAL COMBUSTION ENGINE - An engine ECU executes a program including: determining whether or not a condition for stopping knocking determination is satisfied; setting a flag of stopping correction of a determination value to “ON”; calculating a knock determination level based on the extracted magnitude value; and when the correction stop flag is not “ON”, decreasing or increasing the determination value in accordance with a knock proportion KC that is a proportion of magnitude values greater than the knock determination level. The knock determination level is calculated even when the correction stop flag is “ON”. | 02-12-2009 |
20090165746 | DEVICE AND METHOD FOR CONTROLLING IGNITION TIMING OF INTERNAL COMBUSTION ENGINE - An engine ECU executes a program including: a step (S | 07-02-2009 |
20100108028 | INTERNAL COMBUSTION ENGINE TORQUE CONTROL - In a control device for an internal combustion engine including a throttle valve for adjusting the intake air amount that affects on the torque of the internal combustion engine, when a request for acceleration of the internal combustion engine is made, a torque gradient, which is a change in the torque of the internal combustion engine per unit time during the acceleration, is predicted based on an operating condition of the internal combustion engine before the acceleration, and the operation of the throttle valve is controlled based on the predicted torque gradient during the acceleration of the internal combustion engine. | 05-06-2010 |
20100162794 | DEVICE AND METHOD FOR DETERMINING KNOCKING OF INTERNAL COMBUSTION ENGINE - An engine ECU executes a program including the steps of: calculating an absolute value ΔS(I) of the deviation of the vibration waveform detected by a knock sensor and a knock waveform model from each other at each crank angle; when ΔS(I) greater than threshold value ΔS( | 07-01-2010 |
20100212634 | DEVICE AND METHOD FOR CONTROLLING IGNITION TIMING OF INTERNAL COMBUSTION ENGINE - An engine ECU executes a program that includes the steps of: calculating (S | 08-26-2010 |
20100241335 | TORQUE CONTROL APPARATUS AND CONTROL METHOD FOR VEHICLE DRIVING UNIT - The prevention of the occurrence of a shock during acceleration is enabled without impairing acceleration response as to a control apparatus for a vehicle driving unit. By changing a control amount of a specific one or specific ones of the plurality of the control elements when a torque-up request is issued, the output torque of the vehicle driving unit is increased toward a target output torque. In this case, a torque gradient upon changing the control amount of the specific one or the specific ones of the control elements is estimated and calculated on the basis of a current output torque of the vehicle driving unit according to a calculation rule formulated in advance. The control amounts of the respective control elements including the specific one or the specific ones of the control elements are set such that the estimated torque gradient coincides with a predetermined target torque gradient. | 09-23-2010 |