Abstract: A particulate filter (22) carrying an active oxygen release agent which takes in oxygen and holds oxygen when excess oxygen is present in the surroundings and releases the held oxygen in the form of active oxygen when the concentration of oxygen in the surroundings falls is arranged in an exhaust passage of an engine. The air-fuel ratio of the exhaust gas flowing into the particulate filter (22) is normally maintained lean and is occasionally switched to rich temporarily. When the air-fuel ratio of the exhaust gas is switched to rich, an oxidation reaction of the particulate on the particulate filter is promoted by the active oxygen released from the active oxygen release agent. Due to this, the particulate in the exhaust gas is continuously removed by oxidation on the particulate filter (22) without emitting a luminous flame.

Abstract: An engine comprising a particulate filter which is arranged in the exhaust passage and has a function of absorbing NOx, where the amount of discharged particulate discharged from the combustion chamber per unit time is made smaller than the amount of particulate removable by oxidation per unit time without emitting a luminous flame on the particulate filter and where the temperature of the particulate filter is maintained in a temperature range where the NOx absorption rate becomes more than a certain value.

Abstract: An exhaust gas purifying apparatus for an internal combustion engine includes plural catalysts provided in parallel. In a case where temperatures of the catalysts need to be raised, a catalyst is selected from among the catalysts and the exhaust gas is allowed to flow in the selected catalyst. In addition, the temperature of the selected catalyst is raised without using a reducing agent when the temperatures of the catalysts are lower than a temperature range in which the reducing agent can be purified. Alternatively, the reducing agent is supplied to the selected catalyst so as to raise the temperature thereof when the temperatures of the catalysts are equal to or higher than the temperature at which the reducing agent can be purified.

Abstract: The invention includes a base (21) provided with pairs of fitting hole (25), two each of which are spaced apart and situated facing each other so as to constitute a pair. A pair of rotary shaft portions (28) of each first leg member (27) are rotatably fitted in each pair of fitting holes (25). The two rotary shaft portions (28) are formed on the outer surface of the upper end portion of each first leg member (27) as an integral body therewith so as to extend coaxially. A second leg member (29) is inserted in each first leg member (27) in such a way that the distance by which the second leg member (29) projects from the first leg member (27) can be adjusted. As the top end face of each second leg member (29) can be positioned flush with the top end face of the associated first leg member (27), the invention is capable of improving the telescopic extension ratio of the legs.

Abstract: An mission control unit includes a trunk passage, a loop passage connected to the trunk passage, and a path change portion that is provided in a connecting portion between the trunk passage and the loop passage and that includes a switching valve for changing the path of exhaust gas. The loop passage is provided with a first emission control portion for purifying NOx and carbon-containing particles present in exhaust gas. A second emission control portion for purifying NOx present in exhaust gas is provided in a downstream-side partial passage. The emission control unit is equipped with a reducer injection nozzle for injecting into a first partial loop passage a reducing agent for recovering the emission control functions of the two emission control portions.

Abstract: A reversal device reverses upstream and downstream sides of a particulate filter. First and second collecting surfaces of a collecting wall are used alternately to collect particulates. In order to ensure that a portion of exhaust gas bypasses the particulate filter while a valve body is switched from one position to the other position to reverse the upstream and downstream sides of the particulate filter, the reversal device switches the valve body as soon as the amount of particulates discharged from a combustion chamber of an engine becomes equal to or smaller than a set discharge amount.

Abstract: An exhaust gas purification apparatus, for an engine (1) having a combustion chamber (5), comprising an exhaust passage (10), a particulate filter arranged in the exhaust passage for removing particulate in exhaust gas exhausted from the combustion chamber by oxidation, and a device (30) for controlling the characteristics of the exhaust gas flowing into the particulate filter, wherein, when the judging means judges that the particulate filter will the characteristics of the exhaust gas flowing into the particulate filter to prevent the particulate filter from being deteriorated by heat.

Abstract: The present device for purifying the exhaust gas of an internal combustion engine comprises a particulate filter 70 on which the trapped particulates are oxidized and reversing means 74 for reversing the exhaust gas upstream side and the exhaust gas downstream side of the particulate filter. The particulate filter has a trapping wall for trapping the particulates. The reversing means reverses the exhaust gas upstream side and the exhaust gas downstream side of the particulate filter so that the first trapping surface and the second trapping surface are used alternately to trap the particulates. The particulate filter has a first opening portion and a second opening portion through which the exhaust gas flows in and out from the particulate filter and is arranged in the exhaust pipe 71 upstream of the muffler. At least part of the circumferential portion of the particulate filter between the first opening portion and the second opening portion is in contact with the flow of the exhaust gas in the exhaust pipe.

Abstract: The present device for purifying the exhaust gas of an internal combustion engine comprises a particulate filter 70 arranged in the exhaust system and reversing means 71 for reversing the exhaust gas upstream side and the exhaust gas downstream side of the particulate filter. The trapped particulates are oxidized on the particulate filter, and the particulate filter has a trapping wall for trapping the particulates. The trapping wall has a first trapping surface and a second trapping surface. The reversing means reverses the exhaust gas upstream side and the exhaust gas downstream side of the particulate filter so that the first trapping surface and the second trapping surface are used alternately to trap the particulates.

Abstract: A particulate filter (22) for removing particulates included in an exhaust gas discharged from a combustion chamber (5) is arranged in an engine exhaust passage. The particulate filter has wall partitions (54) which the exhaust gas can pass through. The particulates included in the exhaust gas are removed by oxidation in the interior of the partitions. The particulates are fluidized in the interior of the partitions.

Abstract: A particulate filter (22) is arranged in an exhaust passage of an engine, while an exhaust throttle valve (45) is arranged in the exhaust passage downstream of the particulate filter (22). The exhaust throttle valve (45) is fully closed once, then fully opened cyclically. At that time, the flow velocity of the exhaust gas is increased for just an instant in a pulse-like manner, whereby masses of particulate are separated from the particulate filter 22 and discharged.

Abstract: An exhaust gas purifier includes a particulate filter for oxidizing collected particulates, a reversing device that reverses an exhaust gas upstream side and an exhaust gas downstream side of the particulate filter. The particulate filter includes a collecting wall for collecting the particulates, which includes a first collecting surface and a second collecting surface. The first and the second collecting surfaces are alternately used for collecting the particulates by the reversing device. The catalyst device is arranged adjacent to the particulate filter at a position always being at the downstream side of the particulate filter.

Abstract: A particulate filter (22) is arranged in an exhaust passage of an engine. When an amount of discharged particulate discharged from a combustion chamber (5) per unit time exceeds an amount of particulate removable by oxidation which can be removed by oxidation on the particulate filter (22) per unit time without emitting a luminous flame, at least one of the amount of discharged particulate and the amount of particulate removable by oxidation is controlled so that the amount of discharged particulate becomes smaller than the amount of particulate removable by oxidation, whereby the particulate in the exhaust gas can be continuously removed by oxidation on the particulate filter (22) without emitting a luminous flame.

Abstract: A reducing agent for use in an internal combustion engine is a mixture of an ammonia-derived solid reducing material and a water-insoluble liquid in which the solid reducing agent is immersed. A reducing-agent supply device is provided for supplying a denitration catalyst with the reducing agent, such that the reducing agent is introduced into a portion of an exhaust passage of the internal combustion engine which is upstream of the denitration catalyst.

Abstract: A device for purifying the exhaust gas of an internal combustion engine is disclosed. The device comprises a particulate filter arranged in the exhaust system, which carry a catalyst for absorbing and reducing NOx. The catalyst absorbs NOx when the air-fuel ratio in the surrounding atmosphere thereof is lean and releases the absorbed NOx to purify NOx by reduction when the air-fuel ratio is the stoichiometric or rich. The device further comprises a catalytic apparatus for purifying NOx arranged in the exhaust system upstream of the particulate filter, which has an oxidation function.

Abstract: An engine comprising a particulate filter which is arranged in the exhaust passage and has a function of absorbing NOx, where the amount of discharged particulate discharged from the combustion chamber per unit time is made smaller than the amount of particulate removable by oxidation per unit time without emitting a luminous flame on the particulate filter and where the temperature of the particulate filter is maintained in a temperature range where the NOx absorption rate becomes more than a certain value.

Abstract: A reversal device reverses upstream and downstream sides of a particulate filter. First and second collecting surfaces of a collecting wall are used alternately to collect particulates. In order to ensure that a portion of exhaust gas bypasses the particulate filter while a valve body is switched from one position to the other position to reverse the upstream and downstream sides of the particulate filter, the reversal device switches the valve body as soon as the amount of particulates discharged from a combustion chamber of an engine becomes equal to or smaller than a set discharge amount.

Abstract: A device for purifying the exhaust gas of an internal combustion engine is disclosed. The device comprises a particulate filter arranged in the exhaust system on which the trapped particulates are oxidized, and a reversing mechanism for reversing the exhaust gas upstream side and the exhaust gas downstream side of the particulate filter. The particulate filter has a trapping wall. The trapping wall has a first trapping surface and a second trapping surface. The reversing mechanism reverses the exhaust gas upstream side and the exhaust gas downstream side of the particulate filter so that the first trapping surface and the second trapping surface are used alternately to trap the particulates. The device can improve the amount of particulates that can be oxidized and removed on the particulate filter.

Abstract: An exhaust purifying method and apparatus of an internal combustion engine is provided with an exhaust switch valve for switching a flow of exhaust gas flowing into an exhaust filter. By switching the exhaust switch valve, the exhaust gas is fed from one side and the other side of the filter, thereby stirring the soot (particulates) in the exhaust gas deposited on the filter having a NOx absorbent and an active-oxygen discharging agent supported thereon. Thus, the soot in the exhaust gas is continuously burned. Moreover, the switching of the exhaust switch valve and the rich spike are inhibited from being conducted simultaneously. In the case where the rich spike is conducted in order to discharge and reduce NOx absorbed in the NOx absorbent, the exhaust gas containing a large amount of HC and CO can be prevented from being discharged into the atmosphere without being purified.

Abstract: A monopod body is constructed such that inside pipes having smaller diameters sequentially are extensibly inserted into an outside pipe in a telescopic fashion and a bracket to which a panhead is attached is fitted into the upper end of the outside pipe. Two auxiliary legs whose lengths are substantially equal to the shortest length of the monopod body when the monopod body is contracted most are pivotally attached to the bracket so that the two auxiliary legs can be rotated with an inclination of a predetermined angle. Therefore, the monopod for supporting a camera or the like can be served also as a tripod.