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公开(公告)号：JP2004132247A
公开(公告)日：2004-04-30
申请号：JP2002297122
申请日：2002-10-10
Applicant: Toyota Motor Corp , トヨタ自動車株式会社
Inventor： ASANUMA TAKAMITSU , TANAKA TOSHIAKI , HIROTA SHINYA , UEDA TAKANOBU , YAMASHITA TETSUYA , NAKANO YASUAKI
CPC classification number: Y02T10/121
Abstract: PROBLEM TO BE SOLVED: To provide an exhaust emission control device for suppressing emission of exhaust gas which is not sufficiently purified by adequately collecting exhaust gas even after completing warming-up of a catalyst provided in an exhaust passage of an internal combustion engine.
SOLUTION: An exhaust emission control device 10 of an internal combustion engine 1 is applied to the internal combustion engine in which a catalyst 7 to demonstrate the purifying performance by the warming-up after the engine start is provided in an exhaust passage 4, and takes out exhaust gas from the exhaust passage 4 and collects it in a collection vessel 11. The device monitors whether or not the internal combustion engine 1 is operated in a predetermined state in which the purifying degree of exhaust gas passing through the catalyst 7 is degraded outside a permissible range for an objective period after the warming-up after the engine start is once completed. When the internal combustion engine 1 is operated in the predetermined state, exhaust gas is collected to the collection vessel 11.
COPYRIGHT: (C)2004,JPO-
公开(公告)号：JP2004036456A
公开(公告)日：2004-02-05
申请号：JP2002193630
申请日：2002-07-02
Applicant: Toyota Motor Corp , トヨタ自動車株式会社
Inventor： NAKATANI KOICHIRO , TANAKA TOSHIAKI , HIROTA SHINYA
Abstract: PROBLEM TO BE SOLVED: To reduce the amount of sulfate to be exhausted into the air. SOLUTION: An auxiliary catalyst is arranged in an exhaust passage on the downstream side of a particulate filter supporting a NOx catalyst. Prior to particulate oxidation control for oxidizing accumulated particulates on the particulate filter, SOx removal control is performed for removing SOx deposited on the auxiliary catalyst. Prior to accumulated SOx reduction control for reducing the accumulated SOx in the NOx catalyst, SOx removal control is performed. In the SOx removal control, an average air-fuel ratio AFA of exhaust gas flowing into the auxiliary catalyst is turned slightly rich. COPYRIGHT: (C)2004,JPO
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公开(公告)号：JP2003214154A
公开(公告)日：2003-07-30
申请号：JP2002016870
申请日：2002-01-25
Applicant: TOYOTA MOTOR CORP
Inventor： TOSHIOKA TOSHISUKE , HIROTA SHINYA , TANAKA TOSHIAKI , ASANUMA TAKAMITSU , KIMURA KOICHI , NAKATANI KOICHIRO , KENJO AKIRA
IPC: F02D43/00 , B01D53/86 , B01D53/94 , F01N3/08 , F01N3/20 , F01N3/24 , F01N3/28 , F01N3/36 , F01N9/00 , F02D45/00
Abstract: PROBLEM TO BE SOLVED: To remove SOF adhered to a NOX catalyst. SOLUTION: NOX catalysts 6a, 6b for purifying NOX in exhaust emission emitted from an internal combustion engine are provided in branched emission passages 3a, 3b. The catalyst maintains SOX when the surrounding atmosphere is under lean atmosphere, while it desorbs the maintained SOX therefrom when the atmosphere is converted to rich atmosphere and the temperature exceeds a SOX desorbing temperature. When SOX is to be desorbed from the catalyst, the temperature of the catalyst is increased to the SOX desorbing temperature and a SOX desorption treatment converting the surrounding atmosphere to the rich atmosphere is performed, thereby desorbing SOX from the catalyst. While the desorption treatment is being performed, the surrounding atmosphere of the catalyst is temporarily put under lean atmosphere in prescribed operating conditions showing a reduction in SOX desorption efficiency due to the adhesion of SOF. COPYRIGHT: (C)2003,JPO
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公开(公告)号：JP2003113710A
公开(公告)日：2003-04-18
申请号：JP2001309110
申请日：2001-10-04
Applicant: TOYOTA MOTOR CORP
Inventor： HIROTA SHINYA , TOSHIOKA TOSHISUKE , TANAKA TOSHIAKI
IPC: F02D45/00 , B01D53/94 , F01N3/02 , F01N3/023 , F01N3/025 , F01N3/031 , F01N3/032 , F01N3/035 , F01N3/08 , F01N3/20 , F01N3/24 , F01N3/28 , F01N13/04 , F02B37/00 , F02D41/02 , F02D41/04 , F02M25/07
Abstract: PROBLEM TO BE SOLVED: To increase a particulate oxidation removal level and a NOX purification level in an exhaust emission control device comprising a particulate filter capable of oxidizing and removing particulates continuously and purifying NOX. SOLUTION: The exhaust emission control device comprises a pair of particulate filters 22a and 22b disposed parallel in an exhaust passage, and a combustor 74 for supplying the filters with exhaust gas having a temperature increasing capacity higher than that of engine exhaust gas capable of increasing a filter temperature. The filters carry a NOX catalyst and an oxidizing substance. When NOX absorbed in a NOX catalyst should be reduced, an inflow of engine exhaust gas is checked into the filter carrying the NOX catalyst whose NOX should be reduced, and the filter is supplied by the combustor with exhaust gas of a rich air-fuel ratio so that the filter temperature is held higher than a continuously particulate oxidizing temperature within a NOX reducing temperature range.
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公开(公告)号：JP2002371824A
公开(公告)日：2002-12-26
申请号：JP2001179326
申请日：2001-06-13
Applicant: Toyota Motor Corp , トヨタ自動車株式会社
Inventor： ITO KAZUHIRO , TANAKA TOSHIAKI , NAKATANI KOICHIRO , KENJO AKIRA
CPC classification number: F01N3/0233 , F01N3/0222 , F01N3/0821 , F01N3/0842 , F01N2570/08
Abstract: PROBLEM TO BE SOLVED: To prevent pressure loss of exhaust by clogging of a scavenging material by suppressing formation of ash, in an exhaust emission control device provided with the scavenging material to scavenge particulate matter contained in exhaust discharged from an internal combustion engine. SOLUTION: In this exhaust emission control device for the internal combustion engine provided with the scavenging material to scavenge particulate matter contained in exhaust discharged from the internal combustion engine, ash traps 80 and 81 to attract phosphorus P in exhaust gas are provided on an upstream side of a particulate filter 22. Basic metal is carried on the ash traps 80 and 81. Phosphorus P is flocculated in the particulate filter 22 by being coupled with calcium Ca to suppress formation of ash.
Abstract translation: 要解决的问题：为了通过抑制灰分的形成来防止排气物质的堵塞，排气排放控制装置具备清扫材料，以清除从内燃机排出的废气中所含的颗粒物质。 解决方案：在该内燃机的废气排放控制装置中，该内燃机具备清扫材料以清除从内燃机排出的废气中所含的颗粒物质，在上游侧设置有用于吸引废气中的磷P的灰尘收集器80,81 颗粒过滤器22.碱性金属承载在灰尘捕集器80和81上。磷P通过与钙Ca结合以絮凝在颗粒过滤器22中以抑制灰分的形成。
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Patent Agency Ranking
公开(公告)号：JP2002147217A
公开(公告)日：2002-05-22
申请号：JP2000339627
申请日：2000-11-07
Applicant: TOYOTA MOTOR CORP
Inventor： KENJO AKIRA , TANAKA TOSHIAKI , HIROTA SHINYA , ITO KAZUHIRO , ASANUMA TAKAMITSU , KIMURA KOICHI , NAKATANI KOICHIRO
Abstract: PROBLEM TO BE SOLVED: To accelerate the separation of a lump of particulates causing clogging of a particulate filter from the particulate filter by generating instantaneous increase in flow velocity of exhaust gas larger than the instantaneous increase of the exhaust gas in engine accelerating operation. SOLUTION: When the particulates accumulated on the particulate filter 22 are separated from the particulate filter 22 and exhausted to the outside of the particulate filter, the compressed and stored exhaust gas is ejected from a high pressure gas tank 251, and the flow velocity of the exhaust gas flowing through the particulate filter is instantaneously increased in a pulsed state.
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公开(公告)号：JP2002106329A
公开(公告)日：2002-04-10
申请号：JP2001101131
申请日：2001-03-30
Applicant: TOYOTA MOTOR CORP
Inventor： HIROTA SHINYA , TANAKA TOSHIAKI , ITO KAZUHIRO , ASANUMA TAKAMITSU , NAKATANI KOICHIRO , KIMURA KOICHI
IPC: F02D45/00 , B01D46/42 , B01D53/94 , F01N3/02 , F01N3/08 , F01N3/20 , F01N3/24 , F01N3/28 , F02D41/04 , F02D41/06 , F02M25/07
Abstract: PROBLEM TO BE SOLVED: To timely remove particulate deposited on the surface of a particulate filter from the particulate filter. SOLUTION: Particulate in exhaust emission is oxidized and removed on a particulate filter 22. At the time of starting an internal combustion engine, the temperature of the particulate filter is raised to a particulate oxidizing possible temperature so that the particulate deposited on the particulate filter can be oxidized.
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公开(公告)号：JP2002106328A
公开(公告)日：2002-04-10
申请号：JP2000319758
申请日：2000-10-19
Applicant: TOYOTA MOTOR CORP
Inventor： NAKATANI KOICHIRO , TANAKA TOSHIAKI , HIROTA SHINYA , ITO KAZUHIRO , ASANUMA TAKAMITSU , KIMURA KOICHI
Abstract: PROBLEM TO BE SOLVED: To provide an exhaust emission control device of an internal combustion engine capable of comparatively favorably oxidizing and removing particulate scavenged by reverse flow of exhaust emission, and surely preventing clogging causing remarkable lowering of engine output when deposition of particulate progresses by simple constitution. SOLUTION: This exhaust emission control device is provided with a particulate filter 70 for oxidizing scavenged particulate, and a reversing means 71. The reversing means 71 is provided with a valve element 71a, and the valve element is switched from one position to the other position to reverse the exhaust emission upstream and the exhaust emission downstream of the particulate filter. A first scavenging surface and a second scavenging surface of a scavenging wall are alternately used to scavenge the particulate, and the valve element is put in a closing position between one position and the other position, thereby substantially closing an engine exhaust system.
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公开(公告)号：JP2002106326A
公开(公告)日：2002-04-10
申请号：JP2001140559
申请日：2001-05-10
Applicant: TOYOTA MOTOR CORP
Inventor： HIROTA SHINYA , TANAKA TOSHIAKI , ITO KAZUHIRO , ASANUMA TAKAMITSU , NAKATANI KOICHIRO , KIMURA KOICHI
IPC: F02D45/00 , B01D46/42 , B01D53/94 , F01N3/02 , F01N3/023 , F01N3/08 , F02D41/04 , F02D41/38 , F02M25/07
Abstract: PROBLEM TO BE SOLVED: To prevent a particulate filter from being damaged to be fused or thermally deteriorated by combustion heat of particulates deposited on the surface of the particulate filter. SOLUTION: The particulate filter 22 is disposed in an engine exhaust passage. When particulate in exhaust emission flow into the particulate filter 22, they are oxidized and removed. The engine operating area is divided into a first area where the temperature of the particulate filter is higher than a predetermined temperature and the oxygen concentration in the exhaust emission is higher than a predetermined concentration, and a second area outside the first area.
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公开(公告)号：JP2002097926A
公开(公告)日：2002-04-05
申请号：JP2001123286
申请日：2001-04-20
Applicant: TOYOTA MOTOR CORP
Inventor： ITO KAZUHIRO , TANAKA TOSHIAKI , HIROTA SHINYA , ASANUMA TAKAMITSU , KIMURA KOICHI , NAKATANI KOICHIRO
IPC: F02M25/07 , F01N3/02 , F01N3/021 , F01N3/023 , F01N3/031 , F01N3/035 , F01N3/08 , F01N3/20 , F01N3/24 , F01N3/28 , F02D41/04 , F02D45/00
Abstract: PROBLEM TO BE SOLVED: To prevent a fusion loss of a particulate filter and generation of a crack according to an excessive temperature rise of the particulate filter while impeding deposition of particulates in a partition of the particulate filter. SOLUTION: Particulates temporarily captured by a particulate filter 22 arranged in an exhaust pipe 20 are oxidized by active oxygen as a particulate oxidation promoting component, to make exhaust gas able to pass through the particulate filter 22 alternately from one side and the other side thereof by an exhaust switching valve 73, switching is permitted when a temperature TF of the particulate filter is a prescribed threshold value TF1 or less in the prescribed timing of the switching of the exhaust switching valve 73, the switching is inhibited when the temperature TF of the particulate filter is higher than the threshold value TF1 even in the timing of the switching of the exhaust switching valve 73.
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