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1. 发明专利

JP2002317624A EXHAUST EMISSION CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JP2002317624A
公开(公告)日：2002-10-31
申请号：JP2001123375
申请日：2001-04-20
申请人： TOYOTA MOTOR CORP , TOYOTA CENTRAL RES & DEV
发明人： KATO KENJI , TSUJI SHINJI , MIZUNO TATSUJI , KIMURA MAREO
IPC分类号： F02M25/00 , B01D53/86 , B01D53/94 , B01J20/04 , F01N3/08 , F01N3/28
摘要： PROBLEM TO BE SOLVED: To provide an exhaust emission control method for an internal combustion engine which can suppress an SOx poisoning phenomenon of an exhaust emission purifying catalyst of NOx storage and reduction type and improve a purification rate of the exhaust gas. SOLUTION: The exhaust emission control method for an internal combustion engine according to the present invention is characterized by that a sulfur component causing generation of sulfur oxides after combustion of the internal combustion engine 1 is solidified using a sulfur component solidifying agent 41 containing cesium(Cs) before the above sulfur component flows into an exhaust emission purifying catalyst 39 of NOx storage and reduction type mounted on an exhaust passage 7.

2. 发明专利

JP2002161781A EXHAUST EMISSION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JP2002161781A
公开(公告)日：2002-06-07
申请号：JP2000363538
申请日：2000-11-29
申请人： TOYOTA MOTOR CORP , TOYOTA CENTRAL RES & DEV
发明人： KATO KENJI , ITO TAKAAKI , TANAKA HIROSHI , KUBO SHUICHI , MANDOKORO YOSHIYUKI , BAN HITOSHI
IPC分类号： F02M25/07 , B01D53/34 , B01D53/56 , B01D53/81 , F01N3/08 , F01N3/18 , F01N3/20 , F01N3/24 , F01N3/28 , F02D41/04 , F02D43/00
摘要： PROBLEM TO BE SOLVED: To release SOX from an NOX absorbent when SOX is to be removed by quickly elevating the temperature of NOX absorbent. SOLUTION: The NOX absorbent 26 which absorbs NOX at a lean air/fuel ratio and is capable of storing oxygen is arranged in the exhaust passage of an engine. When SOX is to be removed from the absorbent 26, the air/fuel ratio of an exhaust gas flowing in the absorbent 26 is alternately switched between rich and lean, and the rich air/fuel ratio at that time is regulated to be 14 or lower. Further, the time when the ratio is rich is regulated to be nearly equal to or longer than that when the ratio is lean.

3. 发明专利

JP2002122016A EXHAUST EMISSION CONTROLLING METHOD FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JP2002122016A
公开(公告)日：2002-04-26
申请号：JP2000314039
申请日：2000-10-13
申请人： TOYOTA MOTOR CORP , TOYOTA CENTRAL RES & DEV
发明人： MIZUNO TATSUJI , TSUJI SHINJI , TAKEUCHI MASAHIKO , KATO KENJI , ITO TAKAAKI , KIMURA MAREO
IPC分类号： F01N3/20 , B01D53/94 , B01J27/055 , F01N3/08 , F01N3/10 , F01N3/24 , F01N3/28
摘要： PROBLEM TO BE SOLVED: To provide an exhaust emission controlling method for an internal combustion engine, capable of suppressing a SOx poisoning phenomenon of a NOx storage reduction type exhaust emission control catalyst and further improving a purification ratio of exhaust gas. SOLUTION: This exhaust emission control method is characterized by solidifying sulfur components to be a factor for causing sulfur oxide to be generated, after combustion of the internal combustion engine 1, by using sulfur component solidifying agent (stored in a solidifying agent tank 41) including basic metallic element, holding the solidified sulfur component in the exhaust emission control catalyst 39 and making the sulfur component function as a catalytic component, on the upstream side of the NOx storage reduction type exhaust emission control catalyst 39, which is disposed on an exhaust passage 7.

4. 发明专利

JP2002047956A EXHAUST EMISSION CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JP2002047956A
公开(公告)日：2002-02-15
申请号：JP2000314025
申请日：2000-10-13
申请人： TOYOTA MOTOR CORP , TOYOTA CENTRAL RES & DEV
发明人： MIZUNO TATSUJI , TSUJI SHINJI , TAKEUCHI MASAHIKO , KATO KENJI , ITO TAKAAKI , OGURA YOSHITSUGU , KAWAMURA TETSUO , KIMURA MAREO
IPC分类号： F01N3/08 , B01D53/86 , B01D53/94 , F01N3/20 , F02D19/12
摘要： PROBLEM TO BE SOLVED: To provide an exhaust emission control method for an internal combustion engine capable of suppressing SOx poisoning phenomenon of exhaust gas purifying catalyst of NOx storage reduction type and improving a purification rate of exhaust gas further. SOLUTION: In this exhaust emission control method for the internal combustion engine, sulfur content which becomes the cause for generating sulfur oxide SOx after combustion in the internal combustion engine 1 is solidified before exhaust gas flows into the exhaust gas purifying catalyst 39 of NOx storage reduction type provided in an exhaust passage 7 using sulfur content solidifying agent (stored in a solidifying agent tank 41) containing metallic element having a function for oxidizing sulfur component and basic metallic element.

5. 发明专利

JPH06142458A PURIFYING METHOD OF EXHAUST GAS 失效
公开(公告)号：JPH06142458A
公开(公告)日：1994-05-24
申请号：JP36146892
申请日：1992-12-29
申请人： TOYOTA MOTOR CORP , TOYOTA CENTRAL RES & DEV , CATALER IND CO
发明人： TANIZAWA TSUNEYUKI , KANAZAWA TAKAAKI , TAKESHIMA SHINICHI , TANAKA TOSHIAKI , MATSUMOTO SHINICHI , IGUCHI SATORU , KATO KENJI , KASAHARA KOICHI , TATEISHI SHIYUUJI , MURAKI HIDEAKI
IPC分类号： B01D53/86 , B01D53/94 , B01J23/58 , B01J23/89 , F01N3/24 , B01D53/36
摘要： PURPOSE:To develop a purifying method of exhaust gas capable of maintaining a high purifying ratio being practically allowable, even after duration at high temp., in purification of the exhaust gas under an excessive oxygen atmosphere. CONSTITUTION:In the method simultaneously purifying carbon monoxide, hydrocarbon and nitrogen oxide in the exhaust gas under the excessive oxygen atmosphere and purifying the exhaust gas, the exhaust gas with excessive oxygen is purified by being brought into contact with an exhaust gas purifying catalyst formed by carrying at least one kind metal selected from among the groups of (i) Pt and/or Pd, (ii) Ba and (iii) alkali metal, Fe, Ni, Co and Mg, on a carrying body consisting of a porous body.

6. 发明专利

JPH05187229A EXHAUST EMISSION PURIFIER FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH05187229A
公开(公告)日：1993-07-27
申请号：JP2327892
申请日：1992-01-14
申请人： TOYOTA MOTOR CORP , TOYOTA CENTRAL RES & DEV
发明人： KATO KENJI , INOUE TOKUTA , NOHIRA HIDETAKA , NAKANISHI KIYOSHI , IGUCHI SATORU , KIHARA TETSUO , MURAKI HIDEAKI
IPC分类号： B01D53/94 , F01N3/10 , F01N3/28 , F02D35/00
摘要： PURPOSE:To suppress the increase of an exhaust amount of transient NOx when an air-fuel ratio is changed from lean to stoic. CONSTITUTION:An NOx catalyst 6 containing quantities of La (0.03mol/1cat or more) and carrying platinum is disposed in the exhaust gas passage 4 of a lean combustible internal combustion engine 2. A three-component catalyst 8 is disposed on the downstream of the NOx catalyst. When an air-fuel ratio is changed from lean to stoic, NOx separated from the NOx catalyst 6 is purified by means of a three-component catalyst 8.

7. 发明专利

JPH0631139A PURIFYING METHOD FOR EXHAUST GAS 失效
公开(公告)号：JPH0631139A
公开(公告)日：1994-02-08
申请号：JP18489292
申请日：1992-07-13
申请人： TOYOTA MOTOR CORP , CATALER IND CO , TOYOTA CENTRAL RES & DEV
发明人： KANAZAWA TAKAAKI , TANIZAWA TSUNEYUKI , MIZUNO TATSUJI , IGUCHI SATORU , KATO KENJI , TANAKA TOSHIAKI , TAKESHIMA SHINICHI , KIHARA TETSUO , KASAHARA KOICHI , TATEISHI SHIYUUJI , MURAKI HIDEAKI , SHINJO HIROBUMI , SAIKI MOTOHISA
IPC分类号： B01D53/94 , B01J23/58 , B01J29/74 , F01N3/24 , F01N3/28 , B01D53/36 , B01J29/32
摘要： PURPOSE:To provide the purifying method which efficiently purifies in the wide temp. range NOx, CO and HC contained in an exhaust gas in the actual running state of an automobile varying theoretical A/F value to overlean A/F value. CONSTITUTION:In simultaneously purifying carbon monoxide, hydrocarbon and nitrogen oxide contained in the exhaust gas in an excess oxygen atmosphere, the exhaust gas containing excess oxygen is allowed to contact the catalyst for purifying exhaust gas carrying alkaline oxide and platinum on the carrier consisting of a porous body.

8. 发明专利

JPH05317652A METHOD FOR PURIFYING EXHAUST GAS 失效
公开(公告)号：JPH05317652A
公开(公告)日：1993-12-03
申请号：JP13090492
申请日：1992-05-22
申请人： TOYOTA MOTOR CORP , TOYOTA CENTRAL RES & DEV , CATALER IND CO
发明人： KANAZAWA TAKAAKI , TANIZAWA TSUNEYUKI , MIZUNO TATSUJI , IGUCHI SATORU , KATO KENJI , TANAKA TOSHIAKI , TAKESHIMA SHINICHI , KIHARA TETSUO , MURAKI HIDEAKI , SHINJO HIROBUMI , SAIKI MOTOHISA , KASAHARA KOICHI , TATEISHI SHIYUUJI
IPC分类号： B01D53/94 , B01J23/58 , F01N3/28 , B01D53/36
摘要： PURPOSE:To provide a method for purifying exhaust gas by which NOx, CO and HC in exhaust gas can be efficiently removed in the actual running state of an automobile, etc., varying fuel-air ratio from the theoretical value to about 23. CONSTITUTION:When CO, HC (hydrocarbon) and NOx in exhaust gas in an atmosphere contg. excess oxygen are simultaneously removed, the exhaust gas contg. excess oxygen is brought into contact with a catalyst for purification of exhaust gas obtd. by supporting platinum and the oxide of an alkaline earth metal on a porous carrier.

9. 发明专利

JPH05187230A EXHAUST EMISSION PURIFIER FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH05187230A
公开(公告)日：1993-07-27
申请号：JP2327992
申请日：1992-01-14
申请人： TOYOTA MOTOR CORP , TOYOTA CENTRAL RES & DEV
发明人： KATO KENJI , INOUE TOKUTA , NOHIRA HIDETAKA , NAKANISHI KIYOSHI , IGUCHI SATORU , KIHARA TETSUO , MURAKI HIDEAKI
IPC分类号： B01D53/94 , F01N3/10 , F01N3/28 , F02D35/00
摘要： PURPOSE:To prevent deterioration of an NOX catalyst at a high HC density period, in an exhaust emission purifier having an NOX catalyst containing quantities of La and platinum. CONSTITUTION:An NOX catalyst 6 containing quantities of La (0.03mol/lcat or more) and platinum is disposed in the exhaust gas passage 4 of a lean combustible internal combustion engine 2, and an HC reducing means formed of a three-dimensional catalyst 8 or a catalyst oxide is disposed on the upper stream of the NOX catalyst. Even when HC density is increased at the time of stoic, etc., HC is exhaust gas is reduced by an HC reducing means, and poisoning of platinum of the NOX catalyst 6 by HC adsorption is prevented and durability of a system is improved.

10. 发明专利

JP2005048642A Total evaluation device for exhaust emission control device 有权
标题翻译：用于排气控制装置的总体评估装置
公开(公告)号：JP2005048642A
公开(公告)日：2005-02-24
申请号：JP2003280848
申请日：2003-07-28
申请人： Toyota Central Res & Dev Lab Inc , Toyota Motor Corp , トヨタ自動車株式会社 , 株式会社豊田中央研究所
发明人： KOJIMA SHINJI , JINBO TOMOHIKO , KATO KENJI , MIYASHITA SHIGEKI , WATABE GAO
IPC分类号： F01N3/20 , F01N3/08 , F01N3/28
CPC分类号： Y02A50/2322
摘要： PROBLEM TO BE SOLVED: To provide a total evaluation device for an exhaust emission control device, allowing the prediction and determination of the deterioration of the exhaust emission control device or the evaluation of the durability thereof. SOLUTION: The performance of a catalyst of a NOx occlusion/reduction type or an adsorption type is estimated from its history in use, and the degree of deterioration is determined. A catalyst of a NOx occlusion/reduction type or an adsorption type is made up in a shorter durability testing time which has a deteriorating condition similar to the deteriorating condition of the catalyst of the NOx occlusion/reduction type or the adsorption type when a vehicle travels at a target travel distance or for a target travel time as predetermined. It allows the prediction and determination of the deterioration of the exhaust emission control device or the evaluation of the durability thereof. COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供一种用于废气排放控制装置的综合评估装置，能够预测和确定废气排放控制装置的劣化或评估其耐久性。解决方案：根据其使用历史估计NOx吸留还原型或吸附型催化剂的性能，并且确定劣化程度。 NOx吸留还原型或吸附型的催化剂在较短的耐久性试验时间内形成，该耐久性试验时间具有与NOx吸留还原型催化剂的劣化状态或车辆行驶时的吸附型相似的劣化条件在目标行驶距离处或者作为预定的目标行驶时间。能够预测和确定废气排放控制装置的劣化或其耐久性的评估。版权所有（C）2005，JPO＆NCIPI

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