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51. 发明专利

JPH1193639A DIESEL EXHAUSTED FINE PARTICLE CONTROL DEVICE 失效
公开(公告)号：JPH1193639A
公开(公告)日：1999-04-06
申请号：JP25952197
申请日：1997-09-25
申请人： NIPPON SOKEN
发明人： TAKEUCHI TAKAYUKI , MIYOSHI SHINJI , TAKAGI JIRO
IPC分类号： F01N3/02 , F01N3/20 , F01N3/24
摘要： PROBLEM TO BE SOLVED: To provide a diesel exhausted fine particle control device provided with a heating means capable of effectively activating a catalytic converter arranged on the front stage by low electric power even in the operating condition of a diesel engine, in which the exhaust gas temperature is low and also a catalyst is not activated. SOLUTION: In a diesel exhausted fine particle control device, a plurality of band-shaped heaters 1a, 1b composed of heater heat generating layers having the specified width are provided next to the upstream side of a catalytic converter 2, and partial heating-type heaters so arranged that the distance between respective band-shaped heaters 1a, 1b may have the same width are provided. Therefore, when a filter 3 is regenerated in the operating condition in which the exhaust gas temperature is low and a catalyst 2 is not activated, the partial heating-type heaters electrically generate heat and partially activate the catalytic converter 2, and therefore, the catalytic converter 2 can be effectively activated by low electric power.

52. 发明专利

JPH09317440A EXHAUST PARTICULATE PURIFIER FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH09317440A
公开(公告)日：1997-12-09
申请号：JP12956596
申请日：1996-05-24
申请人： NIPPON SOKEN
发明人： TAKEUCHI TAKAYUKI , MIYOSHI SHINJI , TAKAGI JIRO
IPC分类号： F01N3/02 , F01N3/023 , F01N3/025 , F01N3/027 , F01N3/029 , F01N3/035 , F01N3/20 , F01N3/36 , F01N13/02
摘要： PROBLEM TO BE SOLVED: To regenerate a filter for scavenging particulates in exhaust gas in an exhaust particulate purifier which is operated even under a temperature to activate its catalyst by providing a fuel feed means in the upstream with respect to the filter and providing exothermic bodies of fuel absorbing structure between the fuel feed means and the filter. SOLUTION: When a filter 7 is to be regenerated, if the oxidation catalysts carried by a catalyst carrier 9 and by heating bodies 4 are not heated up to their activation temperature, heaters 42 are energized to heat the heating bodies 4 from their inside after which a fuel feed means 1 injects fuel droplets 8 into exhaust gas 2. When the resultant mixed gas passes near the heating bodies 4, the exhaust gas 2 streams while curving around the respective heating bodies 4 and thus does not hardly flow into fuel absorbing members 4, while the fuel droplets 8 travel straight against the heating bodies 4 and penetrate the fuel absorbing members 41 to be oxidized or burned therein and emitted out therefrom again into the exhaust gas. As a result, the exhaust gas flowing into the catalyst carrier 9 is heated up to heat the oxidation catalyst carried by the catalyst carrier 9 up to its activation temperature.

53. 发明专利

JPH09222009A EXHAUST PARTICULATE PURIFYING DEVICE FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH09222009A
公开(公告)日：1997-08-26
申请号：JP5391396
申请日：1996-02-15
申请人： NIPPON SOKEN
发明人： KOI RYOJI , MIYOSHI SHINJI , TAKAGI JIRO
IPC分类号： F02D43/00 , F01N3/02 , F01N3/023 , F01N3/025 , F01N3/029 , F01N3/035 , F01N3/20 , F01N13/02
摘要： PROBLEM TO BE SOLVED: To perform the excellent regeneration of a filter without needing a long time for regeneration and the increase of an amount of a feed power even on an operation condition that an exhaust gas temperature is especially low during idling. SOLUTION: A catalyst converter 2 is arranged upper stream of a flow of exhaust gas from a catalyst carrier filter 3 arranged in the middle of the exhaust gas flow passage of the internal combustion engine and collecting fine particles contained in exhaust gas. A partial heating heater 21 to electrically generate heat and partially activate the catalyst of a catalyst converter 2 is mounted on the catalyst converter 2. When the filter 3 is regenerated on an operation condition having an exhaust gas temperature lower than a catalyst activated temperature, the partial heating heater 21 is energized to partially activate a catalyst converter 2. Further, unburnt fuel is fed in an exhaust flow passage 1, situated upper stream from the catalyst converter, by a fuel injection valve 4 and oxidized by an activated catalyst. Since a fuel feed amount is controlled to a small amount enough to allow maintenance of an activating state by the activated catalyst until the active state of the catalyst is stabilized, a device temperature is not lowered and thereafter through the increase of a fuel feed amount, an activated region is enlarged to a whole.

54. 发明专利

JPH0842325A EXHAUST FINE PARTICLE PURIFYING DEVICE FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH0842325A
公开(公告)日：1996-02-13
申请号：JP17668494
申请日：1994-07-28
申请人： NIPPON SOKEN
发明人： TAKAGI JIRO , KOJIMA AKIKAZU , MIYOSHI SHINJI , KOI RYOJI
IPC分类号： F01N3/02
摘要： PURPOSE:To regenerate the filter with a catalyst of an exhaust fine particle purifying device even if an internal combustion engine is operated in its condition of a low exhaust temperature such as a low load (a load torque). CONSTITUTION:Since the catalyst of a catalyst carrying filter 5 is activated when the exhaust temperature of an internal combustion engine 1 is high, and if unburnt fuel is supplied to the upstream side of a filter 5 by a fuel supply device 7, piled fine particles are easily ignited and burnt by reaction heat generated at the time of oxidization by a catalyst. Since the catalyst is not activated when the exhaust temperature is low, oxidative reaction is not caused even if fuel is supplied. As a result, the fine particles are discharged while keeping their condition, and not regenerated. A partial heater 4 provided on the upstream side of the catalyst carrying filter 5 is energized electrically, a part of the catalyst on the circumference and the downstream side thereof is heated and activated in an early stage, supplied unburnt fuel is oxidized, reaction heat is generated, the catalyst of the downstream side is heated by this heat, and the fine particles piled in a wide range are heated and burnt.

55. 发明专利

JPH07233720A EXHAUST GAS PARTICULATE PURIFIER 失效
公开(公告)号：JPH07233720A
公开(公告)日：1995-09-05
申请号：JP5116094
申请日：1994-02-23
申请人： NIPPON SOKEN
发明人： OKAMOTO ATSUYA , MIYOSHI SHINJI , KOJIMA AKIKAZU
IPC分类号： F01N3/02
摘要： PURPOSE:To improve efficiency of filter recovery by setting the filter recovering period of a device in accord with a period of time required for the actual filter recovery in an exhaust gas particulate purifier wherein a filter to catch particulates in exhaust gas is provided thereto and the filter is recovered by combustively removing the particulates caught by the filter. CONSTITUTION:A filter temperature detecting means 9 which is connected to a recovery control means 8 is provided in an exhaust gas particulate purifier having such basic constitution that a filter 3 is provide on one of exhaust gas passages of the branch part 2 of an exhaust pipe 1 so that the exhaust gas is run in the exhaust gas passage during particulates catching period and run to the exhaust gas passage 2B during filter recovering period by switching valves 5A, 5B to be controlled by means of a filter recovery control means 8. Further, this purifier is built up in such a manner that the period of time required for the filter recovery is calculated from filter temperature before starting the filter recovery by means of the recovery control means 8, and timing is made to match a recovery end so as to making switching control to valves 5A, 5B.

56. 发明专利

JPH05321639A EXHAUST PARTICULATE PURIFYING DEVICE 失效
公开(公告)号：JPH05321639A
公开(公告)日：1993-12-07
申请号：JP15159692
申请日：1992-05-19
申请人： NIPPON SOKEN
发明人： KOJIMA AKIKAZU , MIYOSHI SHINJI , ARIKAWA FUMIAKI
IPC分类号： F01N3/02
摘要： PURPOSE:To regenerate a favorable filter with less mis-ignition and embers of exhaust particulates without any damage of the filter by heating and regenerating at least only the lower course side end part of the filter, prior to heating and regeneration of the entire filter for collecting the exhaust particulates. CONSTITUTION:A filter 1 consisting of a heat resistant material is installed in the exhaust pipe 90 of an engine 9 and the adjacent upper/lower end parts among plural through holes 11 partitioned by porous partition walls 12 are closed alternately. A heater 2 is installed in at least down stream side end part of the filter 1. Further, a pressure difference meter 3 for detecting the particulate collection amount of the filter 1 based on the pressure difference between the front/rear parts of the filter 1 is installed in the exhaust pipe 90. The heater 2 is controlled by an electrification control part 4. Meantime, the entire filter 1 is regenerated by the electrification control part 4 when the particulate collection amount reaches a prescribed amount, and also only the heater 2 in the down stream side end part is electrified and only the down stream side end part of the filter 1 is regenerated at this intermediate point of time.

57. 发明专利

JPH05306615A 失效
公开(公告)号：JPH05306615A
公开(公告)日：1993-11-19
申请号：JP13631992
申请日：1992-04-28
申请人： NIPPON SOKEN
发明人： KOJIMA AKIKAZU , MIYOSHI SHINJI , INAGAKI MITSUO
IPC分类号： F01N3/02
摘要： PURPOSE:To provide an exhaust gas purifier which prevents break down caused by abnormaly high temperature even if the detection of the quantity of collected particulates is made at a time point after the quantity of collected particulates excesses specified quantity which requires refreshing for some reasons and refreshing is made with particulate excessively collected in an exhaust gas particulate purifier which refresh filters by the particulates collected by the filter by burning the particulates by means of heaters to eliminate them. CONSTITUTION:An exhaust gas purifier is provided with the filter 1 provided in the exhaust pipe 90 of an engine 9 and a plurality of heaters 2A and 2B arranged in the filter 1, which are independent of each other and a particulate collected quantity detecting means 3 to detect the quantity of collected particulates. The exhaust gas purifier is provided with a control means to control the timing to energize the heaters 2A and 2B, and in ordinary filter refreshing, only the heater 2A or both heaters 2A and 2B are energized by this control means. In filter refreshing with particulates excessively collected, firstly the heater 2B is energized and then the heater 2A is energized after energizing the heater 2B.

58. 发明专利

JPH05240027A 失效
公开(公告)号：JPH05240027A
公开(公告)日：1993-09-17
申请号：JP4257992
申请日：1992-02-28
申请人： NIPPON SOKEN
发明人： KOJIMA AKIKAZU , MIYOSHI SHINJI , INAGAKI MITSUO
IPC分类号： F01N3/02 , F01N9/00
摘要： PURPOSE:To even continue regeneration over a wide range of a filter even after stopping an engine without discharging combustion gas outward by regeneration in the case where the engine is stopped during regeneration of a particulate filter. CONSTITUTION:A purifying device is provided with switch valves 8a, 8b, 8c by which the inlet and the outlet of a filter 1 are communicated with each other when an engine is stopped during its regenerating operation, and by which a closed circuit including the filter 1 is formed, and a circulating device 9 for forcing the gas in the closed circuit to circulate flow through the filter 1. After the engine is stopped, regeneration of the particulate filter 1 is continued by means of oxygen included in the gas staying in the closed circuit so as to burn a not-regenerated portion.

59. 发明专利

JPH05168834A DEVICE FOR PURIFYING FINE PARTICLE IN EXHAUST GAS 失效
公开(公告)号：JPH05168834A
公开(公告)日：1993-07-02
申请号：JP33488091
申请日：1991-12-18
申请人： NIPPON SOKEN
发明人： KOJIMA AKIKAZU , MIYOSHI SHINJI , INAGAKI MITSUO
IPC分类号： B01D46/42 , B01D46/00 , F01N3/02 , F01N3/022 , F01N3/023
摘要： PURPOSE:To provide a purifying device for exhaust gas equipped with such a filter for purifying exhaust gas that the cinders of fine particles are nearly not generated even when recovering treatment is repeated many times. CONSTITUTION:The purifying device for fine particles in exhaust gas is equipped with both a porous heat resistant filter 20 which is provided on the exhaust pipe 2 of an engine and filters exhaust gas to collect fine particles incorporated therein and a heating means 21 which burns the fine particles collected and accumulated in the inside of the filter 20 to remove them. The filter 20 is constituted so that the part with 15-25mm toward the inside from the outer peripheral wall thereof becomes the peripheral part and the part of the inside from it becomes the central part. By the structure of the filter 20, the accumulated quantity of fine particles per unit volume of the filter 20 in the respective parts is set so that the ratio of the accumulated quantity in the central part to the peripheral part is regulated to 1:(1.5-2.5). While the combustion temperature in the central part is suppressed and the thermal damage of the filter 20 is prevented, heating value in the peripheral part is increased by combustion of large quantity of fine particles. Thereby the combustion temperature of fine particles is highly maintained.

60. 发明专利

JPH0544443A EXHAUST GAS PARTICULATE PURIFYING DEVICE 失效
公开(公告)号：JPH0544443A
公开(公告)日：1993-02-23
申请号：JP20048291
申请日：1991-08-09
申请人： NIPPON SOKEN
发明人： KOJIMA AKIKAZU , MIYOSHI SHINJI , INAGAKI MITSUO
IPC分类号： F01N3/02 , F01N3/023 , F01N3/027 , F01N3/032 , F01N9/00 , F02B3/06
摘要： PURPOSE:To prevent the generation of a cinder of particulate at a collection filter even when the number of regenerating times of the collection filter is increased by burning and removing particulate accumulated at the collection filter. CONSTITUTION:In a particulate purifying device located in the middle of the exhaust gas pipe of, for example, a diesel engine, the particulate purifying device comprises a collection filter 20 to collect particulate in exhaust gas from the diesel engine, a heating means 21 to burn and remove particulate accumulated at the collection filter, and a pump 32 to feed air required for combustion. An air flow rate control means 40 to control the pump 32 so that a regeneration air flow rate Q responding to an amount of a cinder of the particulate is fed during regeneration through decision of an amount of the cinder of the particulate during preceding regeneration is further provided.

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