Patent application number | Description | Published |
20090077950 | Exhaust Purification System For Internal Combustion Engine - The exhaust purification system for an internal combustion engine according to the present invention includes fuel supply means for supplying fuel to the NOx storage-reduction catalyst from the upstream side thereof, and SOx poisoning recovery control executing means that uses the fuel supply means to supply fuel to the NOx storage-reduction catalyst thereby executing the SOx poisoning recovery control at a predetermined interval during operation of the internal combustion engine. In addition, according to the present invention, the execution of the SOx poisoning recovery control by the SOx poisoning recovery control executing means is prohibited during a predetermined period DELTA Qfen2 starting from a point in time that the operation of the internal combustion engine is initially started. The predetermined period DELTA Qfen2 is longer than a predetermined interval DELTA Qfen1. | 03-26-2009 |
20090254261 | FUEL INJECTION CONTROL DEVICE FOR DIESEL ENGINE - An electronic control unit | 10-08-2009 |
20100077736 | EXHAUST PURIFICATION SYSTEM FOR INTERNAL COMBUSTION ENGINE - In a treatment for regenerating the purification capability of an exhaust emission control system, a technique for improving exhaust emission more positively is provided by supplying a reducing agent to the exhaust emission control system and allowing part of exhaust to bypass the exhaust emission control system. When an addition synchronous bypass control is carried out in which an reducing agent is added when an NSR is subject to NOx reduction treatment and the volume of exhaust passing through a bypass pipe out of exhaust passing an exhaust pipe is increased to thereby decrease the volume of exhaust passing through the NSR, a judgment is made (S | 04-01-2010 |
20100115922 | EXHAUST GAS PURIFICATION SYSTEM FOR INTERNAL COMBUSTION ENGINE - An object of the present invention is to reduce oxide stored in an NOx catalyst in a more preferable manner. According to the present invention, when oxide stored in the NOx catalyst is to be reduced, the combustion mode of the internal combustion engine is switched into a low air-fuel ratio mode in which the air-fuel ratio of the air-fuel mixture in the internal combustion engine is low, and supply of fuel is executed at a time when the air-fuel ratio of the exhaust gas has been made low by the switching of the combustion mode. | 05-13-2010 |
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 |
20100126148 | EXHAUST PURIFICATION SYSTEM FOR INTERNAL COMBUSTION ENGINE - A technique is provided that enables reducer concentrations in exhaust gas flowing into an exhaust purification device on the upstream side and an exhaust purification device on the downstream side provided to an exhaust pipe in series to be controlled separately with a simple configuration. Included are the two exhaust purification devices provided to an exhaust passage in series, a bypass passage that bypasses the exhaust purification device on the upstream side, an exhaust control valve provided to the bypass passage, and reducer supply means provided on the upstream side of a branch portion. A reducer is supplied intermittently from the reducer supply means to periodically change the reducer concentration in the exhaust gas, and the exhaust control valve is opened or closed periodically at a predetermined timing with respect to the change in the reducer concentration. Accordingly, the supplied reducer is distributed to be introduced to the exhaust purification device on the upstream side or to be introduced to the exhaust purification device on the downstream side via the bypass passage. | 05-27-2010 |
20110011063 | EXHAUST GAS CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE - An exhaust gas control apparatus includes an oxidation catalyst, a compact oxidation catalyst having a smaller cross section than that of an engine exhaust passage, a fuel supply valve, a glow plug, and an electronic control unit. The control modes for the exhaust gas control apparatus include a first control mode where the fuel is supplied from the fuel supply valve, heated by the glow plug, and ignited, a second control mode where the fuel is supplied from the fuel supply valve, and heated by the glow plug but is not ignited, and a third control mode where the fuel is supplied from the fuel supply valve and the glow plug does not provide heating. The electronic control unit selects the first or third control mode in the operation region where ignition is possible, and selects the second or third control mode in the operation region where ignition is not possible. | 01-20-2011 |
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 |
20110120098 | EXHAUST PURIFICATION SYSTEM FOR INTERNAL COMBUSTION ENGINE - A technique is provided that can complete reduction and release of SOx from a storage-reduction type NOx catalyst in a shorter period of time in a SOx regeneration treatment of bringing an air-fuel ratio and temperature in the storage-reduction type NOx catalyst to a state where the reduction and release of the SOx is possible by alternately executing rich burn in which burning in a cylinder of an internal combustion engine is performed at a rich air-fuel ratio and lean burn in which the burning is performed at a lean air-fuel ratio. By supplying fuel to exhaust gas from a fuel addition valve provided to an exhaust pipe during a lean period in which the lean burn is executed, the temperature of the storage-reduction type NOx catalyst is maintained at a temperature that enables the reduction and release of the SOx. During a rich period in which the rich burn is executed, a rich atmosphere of the storage-reduction type NOx catalyst is achieved to cause the reduction and release of the SOx. Further, the SOx is reduced and released from the storage-reduction type NOx catalyst also during the lean period by achieving a rich air-fuel ratio of the exhaust gas by the fuel addition from the fuel addition valve. | 05-26-2011 |
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 |
20110258990 | EXHAUST GAS CONTROL DEVICE OF INTERNAL COMBUSTION ENGINE - An exhaust gas control device of an internal combustion engine has an exhaust treatment device that purifies an exhaust gas. The exhaust gas control device is formed such that unburned fuel is supplied into the exhaust gas by a fuel addition valve, and the unburned fuel is ignited by a glow plug, to generate thereby a flame that reaches an upstream end of an exhaust treatment device. The unburned fuel is caused to become adhered to the upstream end of the exhaust treatment device before a generated flame reaches the exhaust treatment device. Then, the unburned fuel adhered to the upstream end of the exhaust treatment device burns by the flame. | 10-27-2011 |
20120017587 | CONTROL SYSTEM OF INTERNAL COMBUSTION ENGINE - A control system of an internal combustion engine which arranges in an engine exhaust passage an exhaust turbine of an exhaust driven type supercharger, arranges in the exhaust passage downstream of the exhaust turbine an exhaust purification catalyst connects the exhaust passage between the exhaust purification catalyst and the exhaust turbine with the exhaust passage upstream of the exhaust turbine by a bypass passage, arranges in the bypass passage a storing agent which stores a specific ingredient in the exhaust, and is provided with an exhaust gas flow switching device which selectively switches the exhaust gas flow between a flow which flows through the exhaust turbine into the exhaust purification catalyst and a flow which flows through the bypass passage into the exhaust purification catalyst. | 01-26-2012 |
20120042632 | METHOD AND APPARATUS FOR PROCESSING EXHAUST GAS IN INTERNAL COMBUSTION ENGINE - An exhaust gas processing apparatus ( | 02-23-2012 |
20120090302 | EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE - An exhaust purification system of an internal combustion engine is provided with an exhaust treatment device which purifies exhaust, a fuel feed device which is arranged at an upstream side from the exhaust treatment device and which feeds fuel to the engine exhaust passage, an ignition device which causes fuel which is fed from the fuel feed device to ignite, and a flow regulating device which regulates the flow rate of exhaust gas which flows toward the ignition device. The fuel feed device is formed so as to feed liquid fuel. The system has an operating region in which due to the fuel which is fed to the engine exhaust passage burning, backflow of the exhaust gas occurs. Further control is performed to make the flow rate of the exhaust gas increase during the period from when combustion of fuel should be started to when combustion of the fuel ends. | 04-19-2012 |
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 |
20120240558 | EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE - An exhaust purification system of an internal combustion engine provided with an NO | 09-27-2012 |
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 |
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 |
20130149198 | EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE - In an internal combustion engine, inside an engine exhaust passage, a hydrocarbon feed valve ( | 06-13-2013 |
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 |
20130167515 | EXHAUST HEATING APPARATUS - An exhaust heating apparatus has a housing defining a firing chamber jointed to an exhaust pipe, a fuel supply valve for injecting fuel to the firing chamber communicated with the exhaust passage through a junction port, a glow plug for igniting the injected fuel. A part of the exhaust gas flowing in the exhaust passage flows into the firing chamber and again flowing out to the exhaust passage together with a combustion gas generated in the firing chamber. An angle between a wall surface in the exhaust pipe positioned upstream of the junction port and an upstream wall surface in the housing, and an angle between a wall surface in the exhaust pipe positioned downstream of the junction port and a downstream wall surface in the housing, are set to an obtuse angle, respectively. | 07-04-2013 |
20130192212 | 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 |
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 |
20130202491 | EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE - An exhaust purification system of an internal combustion engine is provided with a hydrocarbon feed valve arranged in an engine exhaust passage and an exhaust purification catalyst for causing NO | 08-08-2013 |
20130236364 | EXHAUST PURIFYING APPARATUS IN INTERNAL COMBUSTION ENGINE - The present invention provides an exhaust purifying apparatus in an internal combustion engine provided with an exhaust treatment device in an exhaust passage. The exhaust purifying apparatus comprises an oxidation device provided upstream of the exhaust treatment device, a fuel adding valve for adding fuel upstream of the oxidation device, and a glow plug provided upstream of the oxidation device for heating the fuel added from the fuel adding valve. The oxidation device is formed to be provided with gas passages the number of which is equal to or more than 30 and is equal to or less than 200 per 0.00064516 m | 09-12-2013 |
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 |
20130283772 | EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE - An exhaust purification system of an internal combustion engine is provided with a hydrocarbon feed valve which is arranged in an engine exhaust passage and an exhaust purification catalyst which reacts the NO | 10-31-2013 |
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 |
20140030160 | EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE - In an internal combustion engine, inside of an engine exhaust passage, a hydrocarbon feed valve ( | 01-30-2014 |
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 |
20140311124 | EXHAUST GAS HEATING METHOD - A method according to the present invention of heating exhaust gas to be introduced into an exhaust gas purifying device from an internal combustion engine by heating and igniting fuel supplied into an exhaust passage from a fuel supply valve includes the steps of determining a necessity for supplying fuel into the exhaust passage, setting an amount of fuel to be supplied into the exhaust passage from the fuel supply valve, the amount being set when it is judged in the determining step that fuel needs to be supplied into the exhaust passage, checking an operating state of the engine, and controlling an air-fuel ratio of exhaust gas such that the air-fuel ratio falls within an area where amounts of both smoke and HC to be generated in the exhaust gas are low in the operating state of the engine checked in the checking step. | 10-23-2014 |