Patent application number | Description | Published |
20100122527 | EXHAUST GAS PURIFICATION APPARATUS FOR INTERNAL COMBUSTION ENGINE - In an exhaust gas purification apparatus for an internal combustion engine, the regeneration of a filter and the purification of NOx are made compatible with each other while suppressing an excessive supply of HC. The apparatus includes a first exhaust gas purification unit for purifying NOx, a second exhaust gas purification unit arranged in series with the first exhaust gas purification unit for collecting PM, HC supply units for supplying HC to the first exhaust gas purification unit and the second exhaust gas purification unit, respectively, and a priority decision unit for deciding priority between supplying HC to the first exhaust gas purification unit and supplying HC to the second exhaust gas purification unit, wherein an amount of HC to be supplied to a lower priority one is made smaller when a request for supplying HC to the first exhaust gas purification unit and a request for supplying HC to the second exhaust gas purification unit overlap with each other than when the HC supplying requests do not overlap with each other. | 05-20-2010 |
20110041488 | EXHAUST SYSTEM OF INTERNAL COMBUSTION ENGINE - An object of the present invention is to provide a technology that enables efficient utilization of the purification capability of an exhaust gas purification apparatus. To achieve the object, according to the present invention, in an exhaust system of an internal combustion engine provided with a reducing agent supply apparatus that supplies a reducing agent to the exhaust gas before it flows into an exhaust gas purification apparatus, an extension chamber is provided downstream of the position at which the reducing agent supply apparatus supplies the reducing agent to the exhaust gas and upstream of the exhaust gas purification apparatus. The extension chamber is provided with a back step flow creating portion that creates a back step flow of the exhaust gas in the extension chamber and a swirling flow creating portion that creates a swirling flow. As the exhaust gas and the reducing agent flow into the extension chamber as described above, the mixing of the exhaust gas and the reducing agent is promoted by a combined effect of the back step flow and the swirling flow, and partial localization of the distribution of the flow rate is eliminated. | 02-24-2011 |
20110192150 | EXHAUST GAS PURIFICATION APPARATUS FOR INTERNAL COMBUSTION ENGINE - In an exhaust gas purification apparatus for an internal combustion engine, reducing agent is diffused and the exhaust resistance is made small. The apparatus includes a reducing agent addition valve that injects reducing agent, a reducing agent addition valve mount portion that has a space in which the reducing agent addition valve injects the reducing agent outside a stream of exhaust gas flowing in an exhaust passage of an internal combustion engine and on which the reducing agent addition valve is mounted, and an impingement portion that is provided in the reducing agent addition valve mount portion and on which the reducing agent injected through the reducing agent addition valve impinges, wherein the direction of injection of the reducing agent from the reducing agent addition valve is oriented toward the impingement portion, and toward downstream of the reducing agent addition valve with respect to the exhaust gas flow. | 08-11-2011 |
20110252772 | DEVICE FOR PURIFYING EXHAUST GAS OF AN INTERNAL COMBUSTION ENGINE - To homogeneously diffuse, in the exhaust gas, an additive that is fed into a device for purifying exhaust gas of an internal combustion engine. An upstream device for purifying exhaust gas and a downstream device for purifying exhaust gas are connected together through an exhaust pipe having a sectional area smaller than that of the upstream device for purifying exhaust gas and that of the downstream device for purifying exhaust gas, a connection passage portion is provided to connect the exhaust outlet of a catalyst in the upstream device for purifying exhaust gas to the exhaust pipe, the connection passage portion being so formed that the center axis of the upstream device for purifying exhaust gas in the direction in which the exhaust gas flows is not aligned with the center axis of the exhaust pipe in the direction in which the exhaust gas flows, injection means is arranged in the connection passage portion to inject the additive into the exhaust passage so that the additive arrives at the opposing wall surface of the connection passage portion. | 10-20-2011 |
20110308235 | EXHAUST GAS PURIFICATION APPARATUS FOR INTERNAL COMBUSTION ENGINE - A NOx storing and reducing catalyst is disposed in an engine exhaust gas passage in which the catalyst stores NOx contained in the inflow exhaust gas when an air-fuel ratio of inflow exhaust gas is lean and releases and reduces the stored NOx when the air-fuel ratio of the inflow exhaust gas is rich. A stored NOx amount of the NOx storing and reducing catalyst is calculated and an exhaust gas purification operation is controlled based on the stored NOx amount. When the air-fuel ratio of inflow exhaust gas is lean, a ratio of NOx components in the inflow exhaust gas is calculated. An increment of the stored NOx amount per unit time is calculated based on the ratio of NOx components. | 12-22-2011 |
20120085084 | EXHAUST GAS PURIFICATION SYSTEM OF AN INTERNAL COMBUSTION ENGINE - In an exhaust gas purification system provided with two or more exhaust gas purification devices each having an oxygen occlusion ability arranged in series in an exhaust passage, a technique is provided in which the degradation of each of the exhaust gas purification devices can be detected in a distinguished manner with a simple structure. In an exhaust gas purification system having an NSR and a filter with an oxygen occlusion ability arranged in series from an upstream side, an NSR outflow gas air fuel ratio is estimated based on an NSR inflow gas air fuel ratio and an oxygen occlusion ability in the NSR, and a filter outflow gas air fuel ratio is estimated based on the NSR outflow gas air fuel ratio (filter inflow gas air fuel ratio) and an oxygen occlusion ability in the filter. Further, a filter outflow gas air fuel ratio is detected, and the degradation of the NSR and the degradation of the filter are determined in a distinguished manner based on the estimated NSR outflow gas air fuel ratio, the estimated filter outflow gas air fuel ratio, and the actually detected filter outflow gas air fuel ratio. | 04-12-2012 |
20120090303 | EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE - Inside of an engine exhaust passage, a hydrocarbon feed valve ( | 04-19-2012 |
20120124971 | EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE - Inside an engine exhaust passage, in order from the upstream side, a hydrocarbon feed valve, oxidation catalyst, and exhaust purification catalyst are arranged. A first NO | 05-24-2012 |
20120131908 | EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE - An internal combustion engine in an engine exhaust passage of which a hydrocarbon feed valve and an exhaust purification catalyst are arranged. On the exhaust purification catalyst, platinum Pt is carried and a basic layer is formed. A concentration of hydrocarbons flowing into the exhaust purification catalyst is made to vibrate within a predetermined range of amplitude of 200 ppm or more and within a predetermined range of period of 5 seconds or less whereby NO | 05-31-2012 |
20120275963 | EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE - An internal combustion engine in an engine exhaust passage of which a hydrocarbon feed valve ( | 11-01-2012 |
20130000284 | EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE - Inside of an engine exhaust passage, a hydrocarbon feed valve ( | 01-03-2013 |
20130011302 | EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE - In an internal combustion engine, inside of an engine exhaust passage, a hydrocarbon feed and an exhaust purification catalyst are arranged. On the exhaust purification catalyst, platinum Pt is carried and a basic layer is formed. The concentration of hydrocarbons which flows into the exhaust purification catalyst is made to vibrate by within a predetermined range of amplitude and a predetermined range of period due to which the NO | 01-10-2013 |
20130017121 | EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINEAANM Bisaiji; YukiAACI Mishima-shiAACO JPAAGP Bisaiji; Yuki Mishima-shi JPAANM Yoshida; KoheiAACI Gotemba-shiAACO JPAAGP Yoshida; Kohei Gotemba-shi JPAANM Inoue; MikioAACI Susono-shiAACO JPAAGP Inoue; Mikio Susono-shi JPAANM Umemoto; KazuhiroAACI Ebina-shiAACO JPAAGP Umemoto; Kazuhiro Ebina-shi JP - In an internal combustion engine, inside of an engine exhaust passage, an upstream side air-fuel ratio sensor ( | 01-17-2013 |
20130022512 | EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE - In an internal combustion engine, inside of an engine exhaust passage in order from an upstream side, a hydrocarbon feed valve, oxidation catalyst, and exhaust purification catalyst are arranged. On the exhaust purification catalyst, platinum and rhodium are carried and a basic layer is formed. Hydrocarbons are intermittently fed from the hydrocarbon feed valve while maintaining the air-fuel ratio of the exhaust gas flowing into the exhaust purification catalyst lean. At this time, the feed of hydrocarbons is controlled so as to ensure the continued presence of the reducing intermediate on the basic layer. | 01-24-2013 |
20130028795 | EXHAUST GAS PURIFICATION APPARATUS FOR INTERNAL COMBUSTION ENGINE - An exhaust gas purification apparatus for an internal combustion engine comprises a NOx selective reduction catalyst provided in an exhaust passage of an internal combustion engine; an upstream side oxidation catalyst which is a catalyst having an oxidizing ability provided in the exhaust passage upstream from the NOx selective reduction catalyst and which includes a carrier for carrying a noble metal for oxidation, the carrier being formed of a basic carrier; and a reducing agent supply until which supplies a reducing agent to an exhaust gas allowed to flow into the NOx selective reduction catalyst. Accordingly, even when the oxidation catalyst causes the SOx poisoning in the exhaust gas purification apparatus for the internal combustion engine having the oxidation catalyst and the NOx selective reduction catalyst provided in the exhaust passage, the reduction efficiency of NOx reduced by the aid of the NOx selective reduction catalyst is favorably maintained. | 01-31-2013 |
20130034468 | EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE - In an internal combustion engine, inside of an engine exhaust passage, air-fuel ratio sensors each of which has a solid electrolyte, electrodes which respectively cover the two side surfaces of the solid electrolyte, and a diffusion resistance layer which covers one of electrodes are arranged. In operation, the greater the amounts of deposition of sulfur ingredients at the air-fuel ratio sensors, the smaller the amounts of change of the air-fuel ratios detected by the air-fuel ratio sensor and the longer the time period of change of the air-fuel ratios. The amounts of sulfur poisoning of the air-fuel ratio sensors are detected from the changes of the air-fuel ratios detected by the air-fuel ratio sensors. | 02-07-2013 |
20130047589 | EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE - In an internal combustion engine, an upstream side air-fuel ratio sensor ( | 02-28-2013 |
20130052086 | EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE - An exhaust purification system of an internal combustion engine is provided with an exhaust purification catalyst where NO | 02-28-2013 |
20130058840 | EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE - In an internal combustion engine, inside of an engine exhaust passage, a hydrocarbon feed valve ( | 03-07-2013 |
20130074475 | EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE - In an internal combustion engine, inside of an engine exhaust passage, a hydrocarbon feed valve ( | 03-28-2013 |
20130081378 | EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE - Inside of an engine exhaust passage, in order from an upstream side, a hydrocarbon feed valve oxidation catalyst exhaust purification catalyst, and NO | 04-04-2013 |
20130115138 | EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE - An internal combustion engine wherein a hydrocarbon feed valve ( | 05-09-2013 |
20130121885 | EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE - In an internal combustion engine, inside of an engine exhaust passage, a hydrocarbon feed valve ( | 05-16-2013 |
20130149205 | EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE - In an internal combustion engine, inside of an engine exhaust passage, a hydrocarbon feed valve ( | 06-13-2013 |
20130183202 | EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE - In an internal combustion engine, inside an engine exhaust passage, a hydrocarbon feed valve ( | 07-18-2013 |
20130183203 | EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE - In an internal combustion engine, inside of an engine exhaust passage, a hydrocarbon feed valve ( | 07-18-2013 |
20130192224 | EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE - An internal combustion engine wherein an exhaust purification catalyst and a hydrocarbon feed valve are arranged downstream in an exhaust passage. A first NOX purification method, which removes NOX by making a concentration of hydrocarbons that flows into the exhaust purification catalyst vibrate within predetermined amplitude and period ranges and a second NOX purification method which utilizes an adsorption action of NOX to the exhaust purification catalyst are used. A high pressure exhaust gas recirculation system (HPL) causing recirculation of high pressure exhaust gas and a low pressure exhaust gas recirculation system (LPL) causing recirculation of low pressure exhaust gas are provided. When performing an LPL recirculation while performing an NOX purification action by the second NOX purification method, if an acceleration operation occurs, the NOX purification action is switched to the NOX purification action by the first NOX purification method and recirculation is temporarily switched to the HPL recirculation. | 08-01-2013 |
20130195724 | EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE - In an internal combustion engine, inside of an engine exhaust passage, a hydrocarbon feed valve ( | 08-01-2013 |
20130243658 | EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE - In an internal combustion engine, inside of an engine exhaust passage, an NO | 09-19-2013 |
20130259753 | EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE - In an internal combustion engine, inside of an engine exhaust passage, a hydrocarbon feed valve ( | 10-03-2013 |
20130291522 | EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE - In an internal combustion engine, inside an engine exhaust passage, a hydrocarbon feed valve ( | 11-07-2013 |
20130315790 | EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE - In an internal combustion engine, inside of an engine exhaust passage, a hydrocarbon feed valve ( | 11-28-2013 |
20130323131 | EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE - In an internal combustion engine, inside of an engine exhaust passage, a hydrocarbon feed valve ( | 12-05-2013 |
20140127101 | EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE - A method for purifying exhaust gas of an internal combustion engine including flowing an exhaust gas containing NO | 05-08-2014 |