CN101614147B - Exhaust purification apparatus of internal-combustion engine - Google Patents
Exhaust purification apparatus of internal-combustion engine Download PDFInfo
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- CN101614147B CN101614147B CN2009101415966A CN200910141596A CN101614147B CN 101614147 B CN101614147 B CN 101614147B CN 2009101415966 A CN2009101415966 A CN 2009101415966A CN 200910141596 A CN200910141596 A CN 200910141596A CN 101614147 B CN101614147 B CN 101614147B
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- oxidation catalyst
- catalyst
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/206—Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0814—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents combined with catalytic converters, e.g. NOx absorption/storage reduction catalysts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2370/00—Selection of materials for exhaust purification
- F01N2370/02—Selection of materials for exhaust purification used in catalytic reactors
- F01N2370/04—Zeolitic material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2510/00—Surface coverings
- F01N2510/06—Surface coverings for exhaust purification, e.g. catalytic reaction
- F01N2510/063—Surface coverings for exhaust purification, e.g. catalytic reaction zeolites
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
- F01N2570/12—Hydrocarbons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/03—Adding substances to exhaust gases the substance being hydrocarbons, e.g. engine fuel
Abstract
In an exhaust purification apparatus of internal-combustion engine, an oxidation catalyst (10) is arranged on the upstream side of NOx adsorptive catalyst. The apparatus has a NOx removing apparatus that thickens exhausted gas flowing to the NOx adsorptive catalyst and deoxidizes and removes the NOx absorbed on the NOx adsorptive catalyst. The oxidation catalyst consists of an upstream side oxidation catalyst (10a) containing catalyst noble metal such as Pt and a downstream side oxidation catalyst (10b) containing zeolite absorbing additive and catalyst noble metal such as Pt arranged on the downstream side of the downstream side oxidation catalyst.
Description
Technical field
The present invention relates to a kind of Exhaust gas purifying device of internal-combustion engine, relate in particular to a kind of formation of oxidation catalyst of the upstream side that is located at the exhaust gas purification unit.
Background technique
As the device that diesel exhaust gas is purified (exhaust gas purification means), the structure that on exhaust passageway, is equipped with NOx (nitrogen oxide) adsoption catalyst is arranged.NOx adsoption catalyst can attract deposits NOx and SOx (oxysulfide) in the exhaust.In addition; Known have a following regeneration method: the upstream side through at the NOx adsoption catalyst is provided with oxidation catalyst; Upstream side to oxidation catalyst sprays the supply additive; Through oxidation catalyst generation oxidation reaction (burning), produce the atmosphere of exhaust (dense air fuel ratio atmosphere) of high temperature and few oxygen, with the reduction removals such as NOx and SOx of attracting deposits on the NOx adsoption catalyst.Especially when the additive of supplying with to oxidation catalyst is fuel; The fuel that adds from the additive supplier becomes droplet-like; Therefore be necessary to promote to add the gasification of fuel, delivery temperature risen adding the main component HC oxidation reaction in the fuel, and through the consumption of oxygen in the exhaust that brings by this oxidation reaction and the supply of HC; Denseization of air fuel ratio with atmosphere of exhaust realizes reducing atmosphere on the NOx adsoption catalyst.
Yet; In this regeneration method; When the delivery temperature of discharging from motor as cold-starting for example the time is low; Keep droplet-like to add to the exhaust passageway injected fuel, or oxidation reaction can not be carried out efficiently through oxidation catalyst inside, therefore possibly discharge a large amount of HC downstream to oxidation catalyst.Perhaps; The temperature of catalyzer is low during as cold-starting for example; And do not reach the activity of such catalysts temperature when (being used for necessary temp) with the abundant oxidation of HC; Even to the fuel that oxidation catalyst is supplied with droplet-like or gasified, oxidation reaction can not fully be carried out, therefore possibly discharge a large amount of HC downstream.And the catalyst temperature of NOx adsoption catalyst is low to add that regeneration can not fully carry out, and the HC of combustion possibly not flow out from the NOx adsoption catalyst downstream.In addition; Under the situation that oxidation reaction is not fully carried out; Oxidation catalyst through being configured in upstream side only carries out oxidation to the fuel of easy oxidation; The fuel that is difficult to oxidation is discharged as the HC that does not fire downstream, may not use the fuel that adds for the regeneration of controlling the NOx adsoption catalyst efficiently.
Therefore, develop the zeolite that adsorbable HC is set between oxidation catalyst and NOx adsoption catalyst, adsorbing remaining HC, preventing to flow out downstream the technology (with reference to TOHKEMY 2006-329020 communique) of HC.
Yet, even according to the disclosed such Exhaust gas purifying device that constitutes of above-mentioned communique, low, the fully consumption of oxygen of the oxidative function of oxidation catalyst when also existing as cold-starting, or delivery temperature does not rise to the situation of set point of temperature.At this moment, have to further supply with additive, realizing reducing atmosphere or to make delivery temperature rise to set point of temperature, thereby caused the increase of depletion of additive amount to oxidation catalyst.And, though consider that also increasing the catalyzer noble metal amount that oxidation catalyst contained waits the method that improves oxidizability, the problem that also exists cost significantly to rise.
Summary of the invention
The present invention makes in view of such problem; Its purpose is to provide a kind of Exhaust gas purifying device; It can suppress increase and the useless consumption of catalyzer of the product cost of oxidation catalyst, and the oxidizability when improving low temperature is simultaneously guaranteed necessary exhaust purification performance.
In order to achieve the above object, Exhaust gas purifying device of the present invention comprises: be located at exhaust gas purification unit on the exhaust passageway of internal-combustion engine, purifying exhaust gas gas; Be located at the oxidation catalyst on the exhaust passageway of upstream side of exhaust gas purification unit; Be located on the exhaust passageway of upstream side of oxidation catalyst, supply with the additive supplier of liquid additive to this oxidation catalyst, it is characterized in that oxidation catalyst is by the upstream side oxidation catalyst that comprises the catalyzer precious metal; The additive sorbing material of the said additive of the liquid state of being divided in the downstream side of this upstream side oxidation catalyst, comprise this upstream side oxidation catalyst of absorption process and oxidation constitute from the downstream side oxidation catalyst of the catalyzer precious metal of this additive of this additive sorbing material release.
Thus, be in low-temperature condition and oxidation reaction when fully not carrying out, even additive is through also by additive sorbing material absorption that downstream side oxidation catalyst comprised in upstream side oxidation catalyst.Therefore, can not flow into necessary additive in addition to the exhaust gas purification unit, suppressant additive flows out downstream.
When the oxygen concentration of delivery temperature and exhaust gas or near the oxygen concentration catalyst temperature and the catalyzer reach defined terms, be adsorbed on the additive on the additive sorbing material, discharge to the outside of additive sorbing material.Especially in the present invention; The additive sorbing material is included in the downstream side oxidation catalyst and forms; When therefore additive discharges from the additive sorbing material; D/d additive can be improved the air fuel ratio of delivery temperature and denseization atmosphere of exhaust efficiently by the catalyzer precious metal oxidation that downstream side oxidation catalyst comprised.Therefore, can not use the additive that adds to oxidation catalyst, the increase of suppressant additive consumption lavishly flexibly.Oxidizability during especially through raising low temperature can make the exhaust gas purification unit regenerate efficiently, guarantees exhaust purification performance.In addition, through using the additive sorbing material, can suppress the consumption of catalyzer precious metal in the downstream side oxidation catalyst, the product cost that can suppress oxidation catalyst increases.
It is desirable to, upstream side oxidation catalyst is made up of more than one the precious metal that comprises rhodium at least as the catalyzer precious metal, and downstream side oxidation catalyst is made up of at least a above precious metal that does not comprise rhodium as the catalyzer precious metal.
Thus, in downstream side oxidation catalyst, do not use the expensive catalysts Noble Metal Rhodium, the cost that can suppress oxidation catalyst increases.
In this case, it is desirable to, upstream side oxidation catalyst comprises platinum, palladium and rhodium as the catalyzer precious metal, and downstream side oxidation catalyst comprises platinum, palladium as the catalyzer precious metal, and comprises zeolite as the additive sorbing material.
Thus, in downstream side oxidation catalyst, do not use the expensive catalysts Noble Metal Rhodium also can improve oxidizability, therefore when fully guaranteeing oxidizability, the cost that can suppress oxidation catalyst significantly increases.In addition through using platinum, palladium as the catalyzer precious metal, even when low temperature, also can guarantee sufficient oxidizability to the droplet-like additive.
Description of drawings
Through after the accompanying drawing explained of the detailed description stated and only being used to, the present invention can be understood better, but this can not limit the present invention.
Fig. 1 is the structural representation of engine's exhaust system of the present invention.
Fig. 2 is the figure of relation of formation and the exhaust purification performance of expression oxidation catalyst.
Fig. 3 is the figure that under each catalyst temperature, the HC purification efficiency is compared.
Embodiment
Below, according to accompanying drawing, example of the present invention is described.
Fig. 1 is the structural representation of the vent systems of the DENG that turbosupercharger is installed that is suitable for of Exhaust gas purifying device of the present invention (below be called motor 1).
On the outlet pipe 2 of motor 1, upstream side catalyst unit 3 and downstream side catalyst elements 4 these two catalyst elements are installed.
Upstream side oxidation catalyst unit 3 is near the downstream side of the turbine 5 of turbosupercharger and dispose, and oxidation catalyst 10 is equipped with in its inside.Oxidation catalyst 10 is through carrying platinum catalyzer precious metals such as (Pt) on the porous wall of passage and form forming, and can the CO in the exhaust and HC oxidation be changed into CO
2And H
2O, and the NO oxidation in the exhaust generated NO
2
Downstream side catalyst elements 4 is configured in the downstream side of upstream side oxidation catalyst unit 3 as catalyzer under the floor (day: bed down catalyst), and NOx adsoption catalyst 11 is equipped with in its inside.NOx adsoption catalyst 11; In comprising the carrier of for example platinum (Pt), palladium catalyzer precious metals such as (Pd), carry barium (Ba), potassium NOx storage agent such as (K), can catch NOx down in rare air fuel ratio atmosphere (oxidizing atmosphere); On the other hand; Under the dense air fuel ratio atmosphere (reducing atmosphere) of high temperature, the NOx that catches is discharged, make itself and HC, CO in the exhaust react and reduce.
For on NOx adsoption catalyst 11, realize discharging required high temperature and the reducing atmosphere of NOx, NOx adsoption catalyst reclaimer (NOx cleaning device) is equipped with.The NOx cleaning device is by constituting as the outlet pipe fuel injection valve 12 of additive supplier with to the ECU13 that it is controlled.Outlet pipe fuel injection valve 12 is configured in the upstream side of oxidation catalyst 10, can supply with the fuel as additive through the never illustrated fuel tank of petrolift, and fuel is sprayed in the outlet pipe 2 of the upstream side of oxidation catalyst 10.ECU13 comprises input output unit, storage device (ROM, RAM, non-volatile ram etc.), central processing unit (CPU) (CPU) etc.; According to from the detection information of various kinds of sensors such as not shown air flow sensor, CKP, catalyst position sensor, be that the operating condition of motor 1 is controlled burner oil in outlet pipe 2 to outlet pipe fuel injection valve 12.In view of the above, the main component HC that is ejected into the fuel in the outlet pipe 2 carries out oxidation reaction on oxidation catalyst 10, make the exhaust-gas temperature rising that passes through, and consumed the oxygen in the exhaust, makes denseization of air fuel ratio of the exhaust that flows into NOx adsoption catalyst 11.When removing NOx, spray intermittently from the fuel of outlet pipe fuel injection valve 12 and to carry out, the air fuel ratio that makes exhaust thereupon rare and dense between cyclically-varying.
In this example, the oxidation catalyst 10 with upstream side oxidation catalyst unit 3 is divided into upstream side oxidation catalyst 10a and downstream side oxidation catalyst 10b two-part especially.The catalyzer precious metal of upstream side oxidation catalyst 10a is made up of Pt, Pd and rhodium (Rh).Downstream side oxidation catalyst 10b adopts Pt, Pd as the catalyzer precious metal, and adds zeolite as the additive sorbing material.Zeolite can adsorbed fuel primary coil HC, with state of contact around the catalyzer precious metal under or be added near catalyzer precious metal extreme.
Adopt said structure, in this example, in order to remove NOx fuel is sprayed and inflow oxidation catalyst 10 from outlet pipe fuel injection valve 12, at first HC carries out oxidation reaction on upstream side oxidation catalyst 10a, makes exhaust-gas temperature rising and air fuel ratio is reduced.Yet when oxidation catalyst 10 was in low-temperature condition as for example motor has just started the back, the fuel that flows into oxidation catalyst 10 did not have abundant oxidation, had a large amount of HC through oxidation catalyst 10.In this example, in downstream side oxidation catalyst 10b, added zeolite, the HC through upstream side oxidation catalyst 10a is attracted on this zeolite, therefore can prevent to discharge a large amount of HC to the downstream of catalyst elements 3.In addition, in case be adsorbed on the HC on the zeolite in the downstream side oxidation catalyst, because operating condition discharges the catalyzer precious metal oxidations such as Pt that comprised by downstream side oxidation catalyst 10b successively at once from the zeolite that downstream side oxidation catalyst 10b is comprised.Especially; Be added on the zeolite among the downstream side oxidation catalyst 10b; Be configured under the state of contact around the catalyzer precious metal that is comprised with downstream side oxidation catalyst 10b or near catalyzer precious metal extreme; So on downstream side oxidation catalyst 10b, can be from the HC that zeolite discharges by the oxidation efficiently at once of catalyzer precious metal, the result has improved the oxidative function of oxidation catalyst 10 integral body.So; Can be used for efficiently exhaust-gas temperature rising to the temperature of regulation and reduce air fuel ratio and realize reducing atmosphere from outlet pipe fuel injection valve 12 injected fuel; Thereby can the adding quantity of fuel be suppressed to necessary minimum flow, can further improve the fuel utilization ratio.
Fig. 2 is the figure of relation of formation and the exhaust purification performance of expression oxidation catalyst.In the figure,, pass through amount through amount and NOx, this example (A among the figure) and existing technology (B, C among the figure) are compared according to HC with antinomy relation as exhaust purification performance.The expression position is the closer to the left bottom among the figure, and HC must be more little through quantitative change through amount and NOx, and it is good more that exhaust purification performance becomes.At this example is in (A), in upstream side oxidation catalyst 10a, adopts Pt, Pd, Rh as the catalyzer precious metal, in downstream side oxidation catalyst 10b, adopts Pt, Pd as the catalyzer precious metal, and uses zeolite as the additive sorbing material.In existing technology (B), in upstream side oxidation catalyst 10a, adopt Pt, Pd, Rh as the catalyzer precious metal, in downstream side oxidation catalyst 10b, adopt Pt, Pd as the catalyzer precious metal.And, in existing technology (C), in upstream side oxidation catalyst 10a, adopt Pt, Pd, Rh as the catalyzer precious metal, in downstream side oxidation catalyst 10b, adopt Pt, Pd, Rh as the catalyzer precious metal.
As shown in Figure 2, can find out that this example shown in (A) is compared with (B) that do not use zeolite among the figure, has improved exhaust purification performance.And this example (A) is compared with the existing technology (C) that in downstream side oxidation catalyst 10b, also adopts Rh, has also improved exhaust purification performance.
The rhodium of one of catalyzer precious metal (Rh); Beginning oxidation from low-temperature region increases; And under dense air fuel ratio atmosphere, demonstrate the high oxidation effect, therefore known have the method that adopts rhodium to improve exhaust purification performance, but have the problem more expensive than other catalyzer precious metal.In this example; In upstream side oxidation catalyst 10a, use rhodium as one of catalyzer precious metal; But through in downstream side oxidation catalyst 10b, adding zeolite as the additive sorbing material; Even do not use rhodium the oxidation catalyst with regulation oxidizability can be provided yet, can practice thrift product cost.In addition, as stated,, adopt the oxidation catalyst of rhodium to compare, can improve oxidizability all the better with existing technology through in downstream side oxidation catalyst 10b, adding zeolite as the additive sorbing material.
Fig. 3 is the figure of the HC purification efficiency (oxidation efficiency) of one of exhaust purification performance index under each catalyst temperature of expression, and this example that above-mentioned to having (A) constitutes compares with the existing technology with (B) formation.
As shown in Figure 3, can find out that this example (A) is compared the HC purification efficiency that has especially improved low-temperature region with the existing technology that does not have zeolite (B).Therefore, in this example, the NOx adsoption catalyst 11 of when low temperature, also regenerating can fully be guaranteed exhaust purification performance.
In this example, in downstream side oxidation catalyst 10b, used zeolite, but be not limited thereto, so long as have absorption additives function material just passable.Especially, preferably with catalyzer precious metal state of contact under the material that is added.
And; In this example; Through the oxidative function of raising oxidation catalyst 10, the NOx adsoption catalyst of can on NOx adsoption catalyst 11, regenerating expeditiously, and keep exhaust purification performance; But the invention is not restricted to this, for example also can on NOx adsoption catalyst 11, carry out the disengaging control (S regeneration control, S remove control) of S (sulphur) expeditiously.And, when the downstream at oxidation catalyst 10 are provided with DPF (diesel particulate thing filter), also can help to improve the regeneration efficiency of DPF.
Claims (3)
1. the Exhaust gas purifying device of an internal-combustion engine comprises:
Be located at exhaust gas purification unit (11) on the exhaust passageway (2) of internal-combustion engine (1), purifying exhaust gas gas;
Be located at the oxidation catalyst (10) on the exhaust passageway of upstream side of said exhaust gas purification unit;
Be located on the exhaust passageway of upstream side of said oxidation catalyst, supply with the additive supplier (12) of liquid additive to this oxidation catalyst, it is characterized in that,
Said oxidation catalyst (10) comprising: the upstream side oxidation catalyst (10a) that comprises the catalyzer precious metal; The additive sorbing material of the said additive of the liquid state of being divided in the downstream side of this upstream side oxidation catalyst, comprise this upstream side oxidation catalyst of absorption process and oxidation are from the downstream side oxidation catalyst (10b) of the catalyzer precious metal of this additive of this additive sorbing material release.
2. the Exhaust gas purifying device of internal-combustion engine as claimed in claim 1 is characterized in that,
Said upstream side oxidation catalyst (10a) is made up of more than one the precious metal that comprises rhodium at least as said catalyzer precious metal;
Said downstream side oxidation catalyst (10b) is made up of more than one the precious metal that does not comprise rhodium as said catalyzer precious metal.
3. the Exhaust gas purifying device of internal-combustion engine as claimed in claim 2 is characterized in that,
Said upstream side oxidation catalyst (10a) comprises platinum, palladium and rhodium as said catalyzer precious metal;
Said downstream side oxidation catalyst (10b) comprises platinum, palladium as said catalyzer precious metal, and comprises zeolite as said additive sorbing material.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008168533A JP4507018B2 (en) | 2008-06-27 | 2008-06-27 | Exhaust gas purification device for internal combustion engine |
| JP2008-168533 | 2008-06-27 | ||
| JP2008168533 | 2008-06-27 |
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| Publication Number | Publication Date |
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| CN101614147A CN101614147A (en) | 2009-12-30 |
| CN101614147B true CN101614147B (en) | 2012-07-18 |
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| CN2009101415966A Active CN101614147B (en) | 2008-06-27 | 2009-06-01 | Exhaust purification apparatus of internal-combustion engine |
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| JP (1) | JP4507018B2 (en) |
| CN (1) | CN101614147B (en) |
| DE (1) | DE102009022914B4 (en) |
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| EP2651540B2 (en) * | 2010-12-14 | 2022-01-26 | Umicore AG & Co. KG | Architectural diesel oxidation catalyst for enhanced no2 generator |
| CN102322320A (en) * | 2011-08-25 | 2012-01-18 | 湖南大学 | Diesel engine oxidation and catalysis converter with hydrocarbon capture function |
| CN102562232A (en) * | 2011-12-31 | 2012-07-11 | 杭州银轮科技有限公司 | Module used for installing ejection unit for tail gas treatment of diesel engine |
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| CN1038032A (en) * | 1988-04-14 | 1989-12-20 | 日本触媒化学工业株式会社 | The Catalysts and its preparation method that is used for purifying exhaust gas |
| CN1096712A (en) * | 1992-11-27 | 1994-12-28 | 底古萨股份公司 | Reduce the waste gas cleaning system of internal combustion engine cold-starting hydrocarbon emissions |
| JP2006329020A (en) * | 2005-05-25 | 2006-12-07 | Hino Motors Ltd | Exhaust emission control device for engine |
| CN101014757A (en) * | 2004-09-09 | 2007-08-08 | 五十铃自动车株式会社 | Guide structure and exhaust emission control device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3901766A1 (en) * | 1989-01-21 | 1990-07-26 | Templin Annemarie | ELECTRIC SPARKLER |
| JP3470597B2 (en) * | 1998-06-15 | 2003-11-25 | 日産自動車株式会社 | Exhaust gas purification device for internal combustion engine |
| WO2000034632A1 (en) * | 1998-12-05 | 2000-06-15 | Johnson Matthey Public Limited Company | Improvements in particulate control |
| DE10036401B4 (en) * | 2000-07-26 | 2009-07-30 | Volkswagen Ag | Device for reducing the harmful components in the exhaust gas of an internal combustion engine, in particular a diesel internal combustion engine |
| JP2002242665A (en) * | 2001-02-21 | 2002-08-28 | Mazda Motor Corp | Exhaust emission control device for engine |
| JP4051547B2 (en) * | 2002-07-04 | 2008-02-27 | 三菱ふそうトラック・バス株式会社 | Exhaust gas purification device for internal combustion engine |
| JP4320582B2 (en) * | 2003-10-24 | 2009-08-26 | トヨタ自動車株式会社 | Exhaust gas purification device for internal combustion engine |
| JP4218559B2 (en) * | 2004-03-19 | 2009-02-04 | トヨタ自動車株式会社 | Diesel exhaust gas purification device |
| JP2006336589A (en) * | 2005-06-03 | 2006-12-14 | Toyota Motor Corp | Exhaust emission control device of internal combustion engine |
| DE102007008954B4 (en) * | 2007-02-21 | 2009-12-17 | Umicore Ag & Co. Kg | Catalyst system and its use |
| JP5093238B2 (en) * | 2007-07-11 | 2012-12-12 | トヨタ自動車株式会社 | Exhaust gas purification device for internal combustion engine |
-
2008
- 2008-06-27 JP JP2008168533A patent/JP4507018B2/en active Active
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2009
- 2009-05-28 DE DE200910022914 patent/DE102009022914B4/en active Active
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1038032A (en) * | 1988-04-14 | 1989-12-20 | 日本触媒化学工业株式会社 | The Catalysts and its preparation method that is used for purifying exhaust gas |
| CN1096712A (en) * | 1992-11-27 | 1994-12-28 | 底古萨股份公司 | Reduce the waste gas cleaning system of internal combustion engine cold-starting hydrocarbon emissions |
| CN101014757A (en) * | 2004-09-09 | 2007-08-08 | 五十铃自动车株式会社 | Guide structure and exhaust emission control device |
| JP2006329020A (en) * | 2005-05-25 | 2006-12-07 | Hino Motors Ltd | Exhaust emission control device for engine |
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| Publication number | Publication date |
|---|---|
| JP4507018B2 (en) | 2010-07-21 |
| DE102009022914B4 (en) | 2013-09-05 |
| CN101614147A (en) | 2009-12-30 |
| JP2010005552A (en) | 2010-01-14 |
| DE102009022914A1 (en) | 2010-01-14 |
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