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31. 发明专利

JPH05293380A 失效
公开(公告)号：JPH05293380A
公开(公告)日：1993-11-09
申请号：JP12267392
申请日：1992-04-15
申请人： TOYOTA CENTRAL RES & DEV , TOYOTA MOTOR CORP , CATALER IND CO
发明人： ADACHI MARIKO , YOKOTA KOJI , MURAKI HIDEAKI , KANAZAWA TAKAAKI , TATEISHI SHIYUUJI
IPC分类号： B01D53/94 , B01J20/18 , B01J29/06 , B01J29/068 , B01J29/44 , B01J29/74 , B01D53/36 , B01J29/32
摘要： PURPOSE:To provide a catalyst for purification of exhaust gas suitable for purification of exhaust gas with excess oxygen with which nitrogen oxide, carbon monoxide and hydrocarbons can be purified at high efficiency in any traveling state of an automobile from static traveling to transition state, and to provide the production method of this catalyst and a purifying method of exhaust gas. CONSTITUTION:This catalyst for purification of exhaust gas is used to purify nitrogen oxide, carbon monoxide and hydrocarbons at one time in an exhaust gas with excess oxygen atmosphere. This catalyst consists of a coexistence of a catalyst consisting of a porous carrier and a catalyst component and a hydrocarbon adsorbent. The catalyst component contains at least platinum. The hydrocarbon adsorbent essentially consists of an aminosilicate having solid acidity and molecular sieve property. Moreover, this invention covers the production method of this catalyst and purifying method of exhaust gas. The catalyst is produced by physically mixing the platinum-deposited catalyst and the hydrocarbon adsorbent. An exhaust with excess oxygen is brought into contact with the catalyst to be purified.

32. 发明专利

JPH04210241A CATALYST FOR CLEANING EXHAUST GAS 失效
公开(公告)号：JPH04210241A
公开(公告)日：1992-07-31
申请号：JP40029290
申请日：1990-12-04
申请人： TOYOTA MOTOR CORP , TOYOTA CENTRAL RES & DEV
发明人： YAMASHITA KOICHI , YOKOTA KOJI , SAIKI MOTOHISA
IPC分类号： B01D53/94 , B01J23/42 , B01J23/72 , B01J23/74 , B01J23/85 , B01J27/053 , F02B1/04 , F02B3/06
摘要： PURPOSE:To obtain a catalyst having excellent cleaning ability of hydrocarbon (HC), CO and NOx even in an excess oxygen atmosphere by using a solid super strong acid with a transition metal or a transition metal oxide. CONSTITUTION:The solid super strong acid such as SO4/TiO2 or WO3/ZrO2 is used jointly with the transition metal or the transition metal oxide of Mn, Fe, Co or the like. The catalyst obtained in such a way has excellent cleaning ability of HC, CO and NOx in the exhaust gas of the diesel engine or even in the case of lean burn under a dilute condition of gasoline conc. in an excess oxygen atmosphere. Of course, it has excellent cleaning ability of the exhaust gas in the case of not containing excessive oxygen.

33. 发明专利

JPH04197422A FILTER FOR REMOVING COMBUSTIBLE FINE PARTICLES AND NITROGEN OXIDE 失效
公开(公告)号：JPH04197422A
公开(公告)日：1992-07-17
申请号：JP33165490
申请日：1990-11-29
申请人： TOYOTA MOTOR CORP , TOYOTA CENTRAL RES & DEV , TOSOH CORP
发明人： KAWABATA MASATAKA , MATSUMOTO SHINICHI , ISHIBASHI KAZUNOBU , YOKOTA KOJI , KONDO SHIRO , SEKIZAWA KAZUHIKO , KASAHARA SENJI
IPC分类号： B01D39/14 , B01D46/00 , B01D53/94
摘要： PURPOSE:To simultaneously remove both of combustible fine particles and nitrogen oxide by providing the first catalyst layer consisting of cobalt and alumina to the filter wall of a feed-in passage and providing the second catalyst layer consisting of cobalt and zeolite to the filter wall of an exhaust passage. CONSTITUTION:Feed-in passages 10 closed on the outflow sides thereof and exhaust passages 11 closed on the inflow sides thereof are provided to a filter carrier 1 made of cordierite having many passages extending in parallel to the axial direction of the carrier and alternately closed at the opening parts of both end surfaces thereof. The filter walls 12 partitioning the feed-in passages 10 and the exhaust passages 11 have pores with a predetermined pore size. The first catalyst layer 2 consisting of cobalt and alumina is provided on the side of the feed-in passages and the second catalyst layer 3 consisting of cobalt and zeolite is provided on the side of the exhaust passages 11. Therefore, the exhaust gas introduced from the feed-in passages 10 comes into contact with the first catalyst layer and combustible fine particles are efficiently burnt and removed even at low temp. of about 350 deg.C in the presence of heat and oxygen in the exhaust gas by the first catalyst layer. Subsequently, the second catalyst layer accelerates the reaction of NOx and HC in the exhaust gas to reduce NOx to harmless components such as N2, CO2 or H2O to remove the same.

34. 发明专利

JP2006177346A Exhaust emission control device and exhaust gas purification system 有权
标题翻译：排气排放控制装置和排气净化系统
公开(公告)号：JP2006177346A
公开(公告)日：2006-07-06
申请号：JP2005343184
申请日：2005-11-29
申请人： Toyota Central Res & Dev Lab Inc , 株式会社豊田中央研究所
发明人： KAYAMA TOMOYUKI , YOKOTA KOJI , SAKANO KOJI
IPC分类号： F01N3/02 , B01D53/94 , F01N3/08
摘要： PROBLEM TO BE SOLVED: To oxidise soot from a lower temperature zone. SOLUTION: This exhaust emission control device is provided with a basic material 1 capable of catching soot in exhaust gas, an acid compound absorbing means 2 provided on the basic material 1 to absorb an acid compound, and an acid compound desorbing means 10 for desorbing the acid compound absorbed into the acid compound absorbing means 2. A surface of soot is first oxidised to generate the acid compounds such as CO and CO 2 , which are absorbed into the acid compound absorbing means 2. The acid compound is actively exhausted out of a reaction system by the acid compound desorbing means 10 to promote oxidation reaction of soot. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：从低温区氧化烟灰。解决方案：该废气排放控制装置设置有能够吸收废气中的烟灰的碱性物质1，设置在碱性物质1上以吸收酸性化合物的酸性化合物吸收装置2和酸性化合物解吸装置10 用于解吸吸收到酸化合物吸收装置2中的酸化合物。烟灰表面首先被氧化以产生酸性化合物如CO和CO 2 ，其被吸收到酸化合物吸收装置2中酸化合物由酸化合物解吸装置10积极地从反应体系中排出，以促进烟灰的氧化反应。版权所有（C）2006，JPO＆NCIPI

35. 发明专利

JP2001140631A EXHAUST EMISSION CONTROL METHOD AND DEVICE FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JP2001140631A
公开(公告)日：2001-05-22
申请号：JP32618699
申请日：1999-11-16
申请人： TOYOTA CENTRAL RES & DEV
发明人： KAYAMA TOMOYUKI , KIZAKI YOSHIMI , OKUMURA KOHEI , YOKOTA KOJI
IPC分类号： B01D53/94 , F01N3/08 , F01N3/20 , F01N3/28
摘要： PROBLEM TO BE SOLVED: To provide a method and device for effective exhaust emission control by solving problems of a conventional lean-burn engine. SOLUTION: In an exhaust emission control method and device for internal combustion engine, when exhaust gas from an internal combustion engine 11 is passed from each cylinder of the internal combustion engine through a catalyst 13 provided for each exhaust pipe 12, reducer is jetted on a pulse base to the exhaust-gas upstream side of the catalyst in accordance with signals from a NOX meter 15 and a controller 16 in the course of the pulse-base flow of exhaust gas from the internal combustion engine to form a reducing atmosphere in a catalyst region on a pulse base, thereby improving the production of NH3 on the catalyst and the stay of NH3 on the catalyst to improve NOx reducing and purifying operation in exhaust gas with NH3.

36. 发明专利

JPH10151348A OXIDATION CATALYST 失效
公开(公告)号：JPH10151348A
公开(公告)日：1998-06-09
申请号：JP31187696
申请日：1996-11-22
申请人： TOYOTA CENTRAL RES & DEV , DENSO CORP
发明人： YOKOTA KOJI , MATSUOKA YORIKO , SUDA AKIHIKO , NAKAMURA KANEHITO
IPC分类号： B01D53/86 , B01D53/94 , B01J21/16 , B01J23/34 , B01J23/66 , B01J23/72 , B01J23/745 , B01J23/76 , B01J23/89
摘要： PROBLEM TO BE SOLVED: To improve the particulate removing activity of an oxidation catalyst in a low temp. region by producing the catalyst that burns and removes particulates from a carrier made of cerium oxide or zirconium oxide and a catalytic component made of oxide of Cu, Fe or Mn. SOLUTION: A catalytic component made of oxide of at least one kind of metal selected from among Cu, Fe and Mn is carried on a carrier made of at least one of cerium oxide and zirconium oxide to obtain the objective oxidation catalyst that oxidizes HC and SOF contained in exhaust gas from a diesel engine, etc., to purify the exhaust gas and reduces the amt. of particulates discharged. Since cerium oxide is liable to aggregate at >=500 deg.C, it is preferable that cerium oxide is previously stabilized, e.g. by adding 0.2-10mol% La, Y or Pr or 5-50mol% Zr and carrying out firing at >=600 deg.C.

37. 发明专利

JPH1030999A METHOD AND SENSOR FOR DETECTION OF HEAT HISTORY 失效
公开(公告)号：JPH1030999A
公开(公告)日：1998-02-03
申请号：JP20656896
申请日：1996-07-16
申请人： TOYOTA CENTRAL RES & DEV
发明人： YOKOTA KOJI , KIZAKI YOSHIMI , SAKAMOTO TOSHIYUKI , MOTOHIRO TOMOMI
IPC分类号： G01N27/26 , G01K3/04 , G01K7/18 , G01N27/00 , G01N27/04
摘要： PROBLEM TO BE SOLVED: To provide a method and a sensor for the detection of a heat history, by which a state change due to heat, to which an object to be inspected is subjected, can be detected simply. SOLUTION: The heat-history detecting sensor is provided with one pair of electrodes 1, 1, with a diffusion layer 2 which is arranged between the electrodes 1, 1 and which is composed of an insulating substance and with a conductive metal species 3 which is formed so as to make a part between the electrodes 1, 1 at least electrically nonconductive and which is diffused to the diffusion layer 2 according to a temperature inside a thermal atmosphere, to which an object to be inspected is exposed, so as to change the electric resistance of the diffusion layer 2. The heat-history detecting sensor is arranged inside the thermal atmosphere to which the object to be inspected is exposed or near the thermal atmosphere. According to a change in the object to be inspected due to heat, the conductive metal species 3 which constitutes the heat- history detecting sensor is diffused to the diffusion layer 2, and an electric resistance across the electrodes is lowered remarkably after a prescribed time has elapsed. Consequently, when a change in the electric resistance of the heat-history detecting sensor is monitored, the degradation degree of the utility life of the object to be inspected can be detected.

38. 发明专利

JPH08117601A EXHAUST GAS PURIFICATION CATALYST AND METHOD FOR PURIFYING EXHAUST GAS 失效
公开(公告)号：JPH08117601A
公开(公告)日：1996-05-14
申请号：JP25696094
申请日：1994-10-21
申请人： TOYOTA CENTRAL RES & DEV
发明人： HIROSE MIHARU , KIMURA MAREO , YOKOTA KOJI , DOI HARUO
IPC分类号： B01D53/86 , B01D53/94 , B01J23/58
摘要： PURPOSE: To inhibit the deterioration in NOx purification performance of the catalyst after using it for a long period from occurring in an exhaust gas purification catalyst capable of concurrently purifying CO, HC (hydrocarbons) and NOx in an exhaust gas in an excess oxygen atmosphere. CONSTITUTION: This catalyst consists of a carrier obtained by adding at least one alkali metal to a double oxide MAl2 O4 (wherein M is an alkaline earth metal) and a catalyst metal component which contains at least one metal selected from Pt, Pd and Rh and an NOx absorbent and is deposited on the carrier. The double oxide MAl2 O4 is stable with respect to the NOx absorbent such as Ba, etc., namely, hardly reacts with the absorbent. Also, SOx in an exhaust gas is incorporated into the alkali metal to form a multiple sulfate and since the multiple sulfate is liable to decompose, good NOx purification performance of the catalyst can be maintained without adversely affecting the mass transfer between the noble metal and the NOx absorbent.

39. 发明专利

JPH0866621A METHOD FOR REMOVING NITROGEN OXIDE 失效
公开(公告)号：JPH0866621A
公开(公告)日：1996-03-12
申请号：JP26998294
申请日：1994-11-02
申请人： TOYOTA CENTRAL RES & DEV
发明人： ABE KATSUJI , YOKOTA KOJI , KOBAYASHI TETSUO , MORISHITA SHINYA
IPC分类号： B01D53/56 , B01D53/74 , B01D53/94
摘要： PURPOSE: To effectively remove NOx in waste gas to discharge no harmful by-products by electrolyzing gas to be treated into oxygen and ammonia by a solid electrolytic body and purifying the treated gas contg. the electrolytic products by catalytic reaction. CONSTITUTION: A nitrogen oxide removing device consists of an electrolyzer 1 and a catalytic device 2, and the two are connected by a communicating pipe 10. The electrolyzer 1 is provided with a cylindrical solid electrolytic body 3 having hydrogen ion conductivity and/or oxide ion conductivity in the center of the inside of a housing. On both the inner and outer sides of the solid electrolytic body 3, an anode 4 and a cathode 5 each formed of a platinum electrode are formed. And a DC current is applied to between the electrodes 4, 5 and gas to be treated contg. water and nitrogen oxide is brought into contact with the solid electrolytic body 3. Then, water in the gas is electrolyzed to reduce oxygen and nitrogen oxide in the gas on the anode 4 side and on the cathode 5 side respectively to form ammonia. Next, in the 2nd process, oxygen and ammonia are brought into contact with a catalyst to reduce the nitrogen oxide.

40. 发明专利

JPH0847640A CATALYST FOR PURIFICATION OF EXHAUST GAS AND PURIFYING METHOD OF EXHAUST GAS 失效
公开(公告)号：JPH0847640A
公开(公告)日：1996-02-20
申请号：JP18360694
申请日：1994-08-04
申请人： TOYOTA CENTRAL RES & DEV , TOYOTA MOTOR CORP , CATALER IND CO
发明人： YOKOTA KOJI , SHINJO HIROBUMI , TAKAHASHI NAOKI , YAMAZAKI KIYOSHI , IIJIMA TOMOKO , HIROSE MIHARU , DOI HARUO , MIYOSHI NAOTO , SUZUKI HIROMASA , TANIZAWA TSUNEYUKI , ISHIBASHI KAZUNOBU , IGUCHI SATORU , TANAKA TOSHIAKI , TAKESHIMA SHINICHI , KASAHARA KOICHI , TATEISHI SHIYUUJI
IPC分类号： B01D53/94 , B01J23/89
摘要： PURPOSE:To prevent poisoning with sulfur and to improve high temp. durability of the purification performance for NOx. CONSTITUTION:This catalyst for purification of exhaust gas is used to purify at one time CO, HC and NOx in exhaust gas in an oxygen-rich atmosphere and it consists of a porous carrier, noble metals as the catalyst carried on the porous carrier, iron oxide added as an iron powder on the carrier, and at least one kind of NOx absorbent selected from among alkali metals, alkaline earth metals, and rare earth elements. The iron oxide has a much larger particle size compared to the case that iron oxide is deposited in a soln. state by impregnation. Therefore, the reaction with the porous carrier is hardly caused and the decrease in the specific surface area of the porous carrier is hardly caused.

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