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公开(公告)号：JP2005226504A
公开(公告)日：2005-08-25
申请号：JP2004034629
申请日：2004-02-12
Applicant: Hino Motors Ltd , 日野自動車株式会社
Inventor： SATO SHINYA , HOSOYA MITSURU , TAKENAKA YOSHIHIDE , SHIMODA MASATOSHI
IPC: F01N3/08
Abstract: PROBLEM TO BE SOLVED: To enable proper control of an addition amount of a reducing agent by estimating an adsorption amount of a reducing agent to a NOx reduction catalyst. SOLUTION: In a method for controlling an exhaust emission control device where an NOx reduction catalyst 10 is situated in the middle of an exhaust pipe 9, and urea water 17 (the reducing agent) is added on the upper stream side of the NOx reduction catalyst 10 by a urea water adding means 18, and NOx is reduced and purified, an NOx generating amount is estimated and an addition amount of the urea water 17 corresponding to the estimated value is decided. Meanwhile, an NOx reduction amount is estimated and an ammonia consumption amount corresponding to the estimated value is decided. By reducing an integrated value of a consumption amount from an integrated value of an addition amount of the urea water 17, an adsorption amount of ammonia to the NOx reduction catalyst 10 is estimated. A correction factor corresponding to the adsorption amount is decided and an addition amount of the urea water 17 is corrected by the correction factor, and the corrected addition amount of the urea water 17 is set as an addition indicating value to the urea water adding means 18. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract translation: 要解决的问题：通过估算还原剂对NOx还原催化剂的吸附量，能够适当地控制还原剂的添加量。 解决方案：在用于控制排气排放控制装置的方法中，其中NOx还原催化剂10位于排气管9的中间，并且尿素水17（还原剂）加入到排气管9的上游侧 通过尿素水添加机构18将NOx还原催化剂10还原并进行NOx净化，推定NOx生成量，并且决定与该估计值对应的尿素水17的添加量。 同时，估计NOx减少量，并且确定与估计值对应的氨消耗量。 通过从尿素水17的添加量的积分值中减去消耗量的积分值，估计氨对NOx还原催化剂10的吸附量。 确定对应于吸附量的校正因子，并通过校正因子校正尿素水17的添加量，将尿素水17的校正添加量设定为尿素水添加装置18的添加指示值 （C）2005，JPO＆NCIPI
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公开(公告)号：JP2004346828A
公开(公告)日：2004-12-09
申请号：JP2003144716
申请日：2003-05-22
Applicant: Hino Motors Ltd , 日野自動車株式会社
Inventor： SHIMODA MASATOSHI
CPC classification number: Y02T10/47
Abstract: PROBLEM TO BE SOLVED: To provide an exhaust emission control device capable of surely regenerating a particulate filter and providing good NOx reduction effect even under an operation condition of low exhaust temperatures while reducing particulate and NOx simultaneously. SOLUTION: In the exhaust emission control device equipped with a catalyst regeneration type particulate filter 10 in a middle of an exhaust pipe 9, an NOx reduction catalyst (NOx occlusion reduction catalyst 11) reducing and purifying NOx in the exhaust gas 8 is provided on a downstream side of the particulate filter 10 and a plasma generation device 12 discharging electricity in the exhaust gas 8 and generating plasma is provided on an upstream side of the particulate filter 10. The plasma generation device 12 is constructed to be operable under the operation condition of low exhaust temperatures. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract translation: 要解决的问题：提供即使在低排气温度的操作条件同时同时还原颗粒物和NOx的情况下，也能够可靠地再生颗粒过滤器并提供良好的NOx还原效果的废气排放控制装置。 解决方案：在排气管9的中间配备有催化剂再生型微粒过滤器10的废气排放控制装置中，排气8中的还原和净化NOx的NOx还原催化剂（NOx吸留还原催化剂11） 设置在微粒过滤器10的下游侧，在排气8中排出电力而产生等离子体的等离子体产生装置12设置在微粒过滤器10的上游侧。等离子体产生装置12构造成可在 低排气温度的运行条件。 版权所有（C）2005，JPO＆NCIPI
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公开(公告)号：JP2002166130A
公开(公告)日：2002-06-11
申请号：JP2000365199
申请日：2000-11-30
Applicant: HINO MOTORS LTD
Inventor： SHIMODA MASATOSHI , HOSOYA MITSURU
Abstract: PROBLEM TO BE SOLVED: To provide a highly practical reducing agent supply apparatus constituted so that a urea powder is dissolved in water on a vehicle to prepare aqueous urea which is, in turn, supplied to the NOx reducing catalyst on the way of an exhaust pipe as a reducing agent. SOLUTION: The reducing agent supply apparatus 8 for supplying aqueous urea 7 to the NOx reducing catalyst 5 disposed on the way of the exhaust pipe 4 is equipped with an aqueous urea tank 11 having a water supply port 9 and a urea powder charging port 10 formed at the upper part thereof, a jet nozzle 12 formed on the inlet side of the NOx reducing catalyst 5, a supply line 13 connecting the nozzle 12 to the bottom part of the tank 11, a pump 14 disposed on the way of the line 13 to supply aqueous urea 7 to the nozzle 12, a urea powder tank 17 housing a urea powder 16, a quantitative delivery device (two-state upper and lower gate valves 18 and 18) disposed on the bottom part of the tank 17 and quantitatively dilivering the urea powder 16 and a stirrer 19 for stirring aqueous urea 7.
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公开(公告)号：JP2001317346A
公开(公告)日：2001-11-16
申请号：JP2000135764
申请日：2000-05-09
Applicant: HINO MOTORS LTD
Inventor： SHIMODA MASATOSHI , HOSOYA MITSURU
Abstract: PROBLEM TO BE SOLVED: To prevent a sulfate from being formed by an oxidation catalyst even when arranging the oxidation catalyst at the front stage of an NOX reduction catalyst. SOLUTION: The oxidation catalyst 11 is arranged midway of an exhaust pipe 9 in which exhaust gas 7 flows, and the NOX reduction catalyst 13 allowing NOX to selectively react with urea water 24 even under coexistence with oxygen is arranged in the downstream of the oxidation catalyst 11. The urea water 24 is properly added to the NOX reduction catalyst 13 from an injection nozzle 25, and the exhaust gas 7 can be guided to the NOX reduction catalyst 13 by properly detouring the oxidation catalyst 11 through a by-pass passage 14.
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85.发明专利
公开(公告)号：JP2001073748A
公开(公告)日：2001-03-21
申请号：JP25173399
申请日：1999-09-06
Applicant: HINO MOTORS LTD
Inventor： SHIMODA MASATOSHI , HOSOYA MITSURU , MOGI HIRONOBU
IPC: B01D39/14 , B01D53/94 , F01N3/02 , F01N3/023 , F01N3/08 , F01N3/10 , F01N3/20 , F01N3/24 , F01N3/28 , F01N3/36 , F02D41/04 , F02D41/14 , F02D41/40 , F02D43/00
Abstract: PROBLEM TO BE SOLVED: To prevent a filter from harmful clogging caused by accumulation of particulates by oxidative removal of particulates which is done by the affection of breakthrough NO2 to the diesel particulate filter as oxidizing agent, here, breakthrough NO2 is generated by forcing the NOx occludent reduction catalyst to occlude NOx excessively. SOLUTION: During usual operation in lean condition, NO is oxidized mainly to NO2 by NOx occludent reduction catalyst 8 and occluded therein, and breakthrough NO2 is generated by continuous operation. Utilizing this NO2 as oxidizing agent, oxidative removal of particulates which are trapped on the DPF (particulate filter) is practiced. In the next place, catalyst 8 is regenerated by reductive removal of NO2 occluded therein, by switching the engine operation to rich condition. After regeneration, it returns to the continuous operation of DPF cleaning by breakthrough NO2 in lean condition, and then, the cycle of regeneration of NOx occludent reduction catalyst is repeatedly carried out.
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Patent Agency Ranking
公开(公告)号：JP2001050034A
公开(公告)日：2001-02-23
申请号：JP21961799
申请日：1999-08-03
Applicant: HINO MOTORS LTD
Inventor： SATO SHINYA , HOSOYA MITSURU , SHIMODA MASATOSHI
Abstract: PROBLEM TO BE SOLVED: To achieve a practical use of an emission exhaust gas purification device in which by control NOx is released actively from a NOx storage compound according to a reactive temperature range of a NOx reduction catalyst, and the NOx storage compound is compatibly used as the NOx reduction catalyst. SOLUTION: NOx in exhaust gas 2 is oxidized and stored as nitrate temporarily by a NOx storage compound 4. By adding at least one kind among H2, CO, and HC to the exhaust gas 2, while an engine is operated with a necessarily reduced intake air amount to be leaner than a stoichiometric air-fuel ratio, NOx is decomposed and released from the NOx storage compound 4 so as to regenerate the NOx storage compound 4. The released NOx is reduced and purified through being reacted with at least one kind among H2, CO, and HC on a NOx reduction catalyst 5.
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公开(公告)号：JPH10212931A
公开(公告)日：1998-08-11
申请号：JP1541097
申请日：1997-01-29
Applicant: HINO MOTORS LTD
Inventor： HOSOYA MITSURU , SHIMODA MASATOSHI
Abstract: PROBLEM TO BE SOLVED: To reduce the amount of NOx to be discharged by introducing reductants injection-controlled in a pulse form to an exhaust pipe via a pump and a solenoid valve when an exhaust gas temperature is a specified temperature. SOLUTION: The temperature of exhaust gas entering a catalyst 5 is detected by a temperature sensor 8 installed in the vicinity of a catalyst entrance in an exhaust pipe, an engine speed is detected by a rotation sensor 9 attached to an engine and a fuel load applied to the engine is detected by a load sensor 10 attached to an accelerator system. From these detected data, the optimal amount of reductants and optimal injection time are calculated and these calculated values are inputted to a pulse generator 13. Then, an operation signal is fed from the pulse generator 13 to a solenoid valve 12. This solenoid valve 12 is provided in the discharge side pipe of a pump 4 for pressure-supplying reductants from a reductant tank 11. Thus, when the solenoid valve 12 is operated by a pulse signal, reductants are injection-controlled in a pulse form and introduced via a nozzle in the tip part of a reductant pressure-feeding pipe.
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公开(公告)号：JPH10110613A
公开(公告)日：1998-04-28
申请号：JP26321896
申请日：1996-10-03
Applicant: DENSO CORP , HINO MOTORS LTD
Inventor： YOSHIDA HIDEJI , TOTANI TAKAYUKI , YASUURA NOBUSHI , SHIMODA MASATOSHI , IGARASHI TATSUOKI
Abstract: PROBLEM TO BE SOLVED: To prevent occurrence of a problem of battery flat at the time of recovery in a vehicle having an engine automatic stopping/starting device. SOLUTION: When exhaust fine particles are collected alternately in filters 2, 3 arranged in the exhaust pipes of an engine 1 and an ECU 22 judges that a collected amount of fine particles reaches a predetermined amount, electric heaters 4, 5 and an air pump 10 are operated so as to recover the filters 2, 3 collecting the fine particles. The ECU 22 outputs an engine automatic stopping prohibiting signal to an engine automatic stopping/starting device 25 while controlling the recovery of the filters, so that the engine 1 is prevented from being automatically stopped, and battery flat can be prevented.
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公开(公告)号：JPH10354A
公开(公告)日：1998-01-06
申请号：JP15669396
申请日：1996-06-18
Applicant: HINO MOTORS LTD
Inventor： SHIMODA MASATOSHI , HOSOYA MITSURU
IPC: B01D53/86 , B01D53/94 , B01J23/40 , B01J23/42 , B01J27/22 , B01J27/224 , B01J27/24 , B01J37/00 , B01J37/02
Abstract: PROBLEM TO BE SOLVED: To provide a catalyst having a wide active temp. range for the reduction of NOx . SOLUTION: The catalyst is composed by deposing platinum group elements on a porous carrier composed of a ceramic material having higher thermal stability than alumina and having open voids. Preferably, the open voids rate is 1 to 40vol.%, and the ceramic material is one ore more kinds selected from zirconium oxide, zirconium carbide, silicon carbide, silicon nitride and titanium carbide. The catalyst is produced by adding carbon, an inorg. binder and water to a granular ceramic material, kneading the mixture, molding, drying and firing to volatilizing the carbon content to obtain a porous carrier, and then depositing platinum group elements. Otherwise, the platinum elements may be prepared in a slurry state and applied on the carrier. It is preferable to add 2 to 2 pts.wt. talc to 100 pts.wt. of the ceramic material.
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公开(公告)号：JPH0932540A
公开(公告)日：1997-02-04
申请号：JP17713295
申请日：1995-07-13
Applicant: HINO MOTORS LTD
Inventor： SHIMODA MASATOSHI , HOSOYA MITSURU
IPC: F01N3/02 , B01D53/94 , F01N3/05 , F01N3/20 , F01N3/22 , F01N3/24 , F01N3/28 , F01N9/00 , F01N13/02 , F02B37/00
Abstract: PROBLEM TO BE SOLVED: To more efficiently reduce NOx by actuating a cooling system on the basis of respective detecting outputs of temperature, rotation and load sensors when the temperature sensor detects that exhaust gas of a diesel engine exceeds a prescribed temperature. SOLUTION: Operation of a diesel engine 11 is continued, and when a temperature sensor 31 detects that an exhaust gas temperature exceeds a prescribed temperature, a controller 36 actuates a directional control valve 26b and a force feed pump 26c, and a hydrocarbon type reducing agent 33 is injected from an injection nozzle 26. At the same time, respective detecting outputs of temperature, rotation and load sensors 31, 23 and 24 are compared with a map stored in a memory 36b, and are controlled by finding optimal opening of an opening adjusting valve 19. The inside of an air introducing pipe 17 is put under negative pressure by an exhaust gas flow injected into one end of a downstream exhaust pipe 13b from the other end of an upstream side exhaust pipe 13a, and an air flow running toward one end from the other end of the air introducing pipe 17 is generated, and this air flows in the downstream exhaust pipe 13b. As a result, exhaust gas is mixed with air in the atmosphere, and an exhaust gas temperature is lowered.
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