摘要:
There is provided an exhaust purifying system for an internal combustion engine which can achieve a function of a catalyst without deteriorating a function of ozone at the time of oxidizing and removing PM by using the ozone. The exhaust purifying system for the internal combustion engine comprises a wall-flow type particulate filter (30) for collecting particulate matter in an exhaust gas inside an exhaust passage, wherein the catalyst (38) is supported only in a part of a partition wall (37) of the particulate filter defining a passage (36) on the downstream side of the partition wall (37). In consequence, when ozone is supplied, since the ozone is introduced on the upstream side of the partition wall (37) in which the PM is collected, the ozone does not contact the catalyst supported only in the part of the partition wall defining the passage (36) on the downstream side of the partition wall. Therefore, it is prevented that the ozone is decomposed, and a PM oxidation function is achieved.
摘要:
There is provided an exhaust purifying system for an internal combustion engine which can achieve a function of a catalyst without deteriorating a function of ozone at the time of oxidizing and removing PM by using the ozone. The exhaust purifying system for the internal combustion engine comprises a wall-flow type particulate filter (30) for collecting particulate matter in an exhaust gas inside an exhaust passage, wherein the catalyst (38) is supported only in a part of a partition wall (37) of the particulate filter defining a passage (36) on the downstream side of the partition wall (37). In consequence, when ozone is supplied, since the ozone is introduced on the upstream side of the partition wall (37) in which the PM is collected, the ozone does not contact the catalyst supported only in the part of the partition wall defining the passage (36) on the downstream side of the partition wall. Therefore, it is prevented that the ozone is decomposed, and a PM oxidation function is achieved.
摘要:
An exhaust gas purifying apparatus provided in an exhaust passage (60) connected with an engine (50) includes an upstream catalyst (20) that is provided in the exhaust passage (60), and that removes NOx; a downstream catalyst (30) that is provided downstream of the upstream catalyst (20) in the exhaust passage (60); and supply means (40) for supplying an oxygen-activating component to a portion of the exhaust passage (60) located between the upstream catalyst (20) and the downstream catalyst (30). In the exhaust gas purifying apparatus, the upstream catalyst (20) removes NOx, and then an oxygen-activating component is supplied to the exhaust gas. Further, the downstream catalyst (30) removes a hydrocarbon compound contained in the exhaust gas.
摘要:
The present invention provides an exhaust gas purifying device comprising an electrically insulated hollow cylindrical case, a cylindrical outer circumferential electrode arranged on an inner wall of the hollow cylindrical case, a bar-shaped center electrode held on a center axis of the outer circumferential electrode, and a metallic hollow cylindrical body arranged between the outer circumferential electrode and the center electrode, wherein the metallic hollow cylindrical body is electrically insulated and has a plurality of holes to permit particulate matter to pass therethrough without being accumulated.
摘要:
The device for cleaning exhaust gas of the internal combustion engine includes means provided in an exhaust gas passage (15) of the internal combustion engine (10), such as a NOx catalyst (20), a SOx trap catalyst (30) provided at a position upstream from the exhaust gas cleaning means, and means (40, 41) for feeding ozone to a position upstream from the SOx trap catalyst. SOx in the exhaust gas is absorbed by the SOx trap catalyst before reaching the NOx catalyst. Particularly, it is possible to oxidize SOx in the exhaust gas by ozone as oxidizing gas to be an easily decomposable state, whereby SOx is absorbable even at a low temperature. Preferably, the SOx trap catalyst has no active points consisting of precious metal. In such a case, the SOx trap catalyst is prevented from being sulfur-poisoned whereby the deterioration of the SOx absorbing ability is avoidable.
摘要:
To provide a catalytic converter that reduces non-uniformity of temperature of a catalyst support and that can approach a uniform temperature distribution, and a structural body for supporting a catalyst that structures this catalytic converter. At a catalyst support (14), gradually decreasing width portions (14D), at which a width W thereof gradually decreases toward electrode centers (16C), are formed at regions where electrodes (16A), (16B) are contactingly disposed, as seen in a cross-section orthogonal to a direction in which exhaust flows. The width W is shorter than a length L1 of a center line CL at a given position. Heat generation and heat dissipation of the catalyst support (14) are balanced overall.
摘要:
This invention provides an exhaust gas purifier for an internal combustion engine comprising exhaust gas purification means such as an NOx catalyst (20) provided in an exhaust passage (15) in an internal combustion engine, and an SOx trapping catalyst (30) provided upstream of the exhaust gas purification means, and ozone supply means (40, 41) which can supply ozone to a position upstream of the SOx trapping catalyst (30). According to the above constitution, SOx in the exhaust gas can be absorbed in the SOx trapping catalyst (30) before arrival at the NOx catalyst (20). In particular, SOx in the exhaust gas can be oxidized with ozone as an oxidizing gas to a decomposable state, and SOx can be absorbed even at a low temperature. Preferably, the SOx trapping catalyst (30) does not have an active site of a noble metal. In this case, sulfur poisoning of the SOx trapping catalyst can be prevented, and a lowering of the SOx absorption capacity can be suppressed.
摘要:
A device for controlling an internal combustion engine comprises a device (30) for trapping particulate matter (PM) in exhaust gas in an exhaust passage (15), means (40, 41, 42) for supplying ozone to the particulate matter trapping device (30) from the upstream thereof to oxidize and remove PM deposited in the device (30), and means (100) for interrupting the fuel injection of the internal combustion engine (10) upon the execution of ozone supply by the ozone supply means. It is possible to prevent components consuming ozone, such as NOx, from being contained in the exhaust gas of the internal combustion engine, whereby ozone is effectively usable.
摘要:
An exhaust gas purifying apparatus provided in an exhaust passage (60) connected with an engine (50) includes an upstream catalyst (20) that is provided in the exhaust passage (60), and that removes NOx; a downstream catalyst (30) that is provided downstream of the upstream catalyst (20) in the exhaust passage (60); and supply means (40) for supplying an oxygen-activating component to a portion of the exhaust passage (60) located between the upstream catalyst (20) and the downstream catalyst (30). In the exhaust gas purifying apparatus, the upstream catalyst (20) removes NOx, and then an oxygen-activating component is supplied to the exhaust gas. Further, the downstream catalyst (30) removes a hydrocarbon compound contained in the exhaust gas.