Patent application number | Description | Published |
20080288091 | Control parameters for searching - An optimum control parameter in control of an internal combustion engine and the like is searched. In a plurality of search cycles, a control parameter that maximizes an output of an object to be controlled which shows an output realized by a given control parameter is searched using control parameters. The control parameters are provided at each search cycle by a predetermined algorithm. A periodic function of a predetermined period and a correction value obtained in a previous search cycle are added to the control parameters to obtain an input parameters to the object. An output obtained from the object with the input parameters is multiplied by the periodic function to obtain a correction value for correcting the control parameters such that the search converges. | 11-20-2008 |
20090077953 | Device and method of controlling exhaust gas sensor temperature, and recording medium for exhaust gas sensor temperature control program - A control input (DUT) for controlling a heater ( | 03-26-2009 |
20110192144 | EXHAUST GAS PURIFYING APPARATUS FOR INTERNAL COMBUSTION ENGINE - An exhaust gas purifying apparatus for an internal combustion engine is provided. The apparatus includes a first catalyst and a second catalyst. The first catalyst is provided in an exhaust passage of the engine, and can remove NOx in exhaust gases from the engine when an air-fuel ratio of an air-fuel mixture burning in the engine is in the vicinity of the stoichiometric ratio. The second catalyst is provided downstream of the first catalyst, an can remove NOx in the exhaust gases using a reducing agent. An execution condition of a lean operation in which the air-fuel ratio is set to a lean air-fuel ratio which is leaner than the stoichiometric ratio, is determined. When switching the air-fuel ratio from an air-fuel ratio in the vicinity of the stoichiometric ratio to the lean air-fuel ratio, the air-fuel ratio is controlled to a rich air-fuel ratio which is richer than the stoichiometric ratio, during a lean transition period from the time the execution condition is satisfied. The air-fuel ratio is controlled to the lean air-fuel ratio after the lean transition period has elapsed. | 08-11-2011 |
20110192148 | EXHAUST GAS PURIFYING APPARATUS FOR INTERNAL COMBUSTION ENGINE - An exhaust gas purifying apparatus for an internal combustion engine is provided. A selective reduction catalyst is disposed in an exhaust passage of the engine for reducing NOx in exhaust gases from the engine under existence of a reducing agent. The reducing agent or a reactant for generating the reducing agent is supplied to the upstream side of the selective reduction catalyst. Occurrence of a reducing-agent slip in which the reducing agent is discharged to the downstream side of the selective reduction catalyst is determined. A storage amount indicative of an amount of the reducing agent stored in the selective reduction catalyst is temporarily reduced from the state where the storage amount is at the maximum, and thereafter the storage amount is increased until the occurrence of the reducing-agent slip is detected. An accuracy of the reducing agent supply is determined according to an occurrence state of the reducing agent slip when the storage amount is changed. | 08-11-2011 |
20110192149 | EXHAUST GAS PURIFYING APPARATUS FOR INTERNAL COMBUSTION ENGINE - An exhaust gas purifying apparatus for an internal combustion engine is provided. A selective reduction catalyst is disposed in an exhaust passage of the engine for reducing NOx in exhaust gases from the engine under existence of a reducing agent. The reducing agent or a reactant for generating the reducing agent is supplied to the upstream side of the selective reduction catalyst. Occurrence of a reducing-agent slip in which the reducing agent is discharged to the downstream side of the selective reduction catalyst is determined. A storage amount indicative of an amount of the reducing agent stored in the selective reduction catalyst is temporarily reduced from the state where the storage amount is at the maximum, and thereafter the storage amount is increased until the occurrence of the reducing-agent slip is detected. A supply correction amount for correcting an amount of the reducing agent is calculated according to an occurrence state of the reducing agent slip when the storage amount is changed. A basic supply amount of the reducing agent is calculated according to an operating condition of the engine or a NOx concentration on the upstream side of the selective reduction catalyst. A supply amount of the reducing agent is calculated by correcting the basic supply amount using the supply correction amount. | 08-11-2011 |
20110232263 | EXHAUST GAS PURIFYING APPARATUS FOR INTERNAL COMBUSTION ENGINE - An exhaust gas purifying apparatus for an internal combustion engine having a lean NOx catalyst in an exhaust system is provided. The lean NOx catalyst traps NOx in exhaust gases when the exhaust gases are in an oxidizing state, and discharges the trapped NOx when the exhaust gases are in an reducing state. In this apparatus, an estimated trapped NOx amount which is an estimated value of an amount of NOx trapped in the lean NOx catalyst, is calculated using a neural network. Engine operating parameters indicative of an operating condition of the engine are input, and the neural network outputs at least one control parameter which is relevant to the lean NOx catalyst. A reducing process of the NOx trapped in the lean NOx catalyst is performed according to the estimated trapped NOx amount. | 09-29-2011 |
20120232764 | CONTROL APPARATUS FOR AUTOMATIC TRANSMISSION - In a control apparatus for an automatic transmission, it is configured to calculate a change amount (ΔNC estimation value) of an output rotational speed of the transmission (S | 09-13-2012 |
20130318949 | EXHAUST GAS PURIFYING SYSTEM OF INTERNAL COMBUSTION ENGINE - An exhaust gas purifying system includes: a SCR catalyst which has a function of reducing NOx and absorbing NO | 12-05-2013 |
20140069097 | EXHAUST PURIFICATION SYSTEM FOR INTERNAL COMBUSTION ENGINE - An exhaust purification system is provided that can decrease the load acting on a device treating PM, even when switched to stoich operation. The exhaust purification system includes: a PM treatment device, a three-way purification catalyst, an LAF sensor, and an ECU ( | 03-13-2014 |