CN203009055U - Emission control system of engine - Google Patents
Emission control system of engine Download PDFInfo
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- CN203009055U CN203009055U CN2012206351192U CN201220635119U CN203009055U CN 203009055 U CN203009055 U CN 203009055U CN 2012206351192 U CN2012206351192 U CN 2012206351192U CN 201220635119 U CN201220635119 U CN 201220635119U CN 203009055 U CN203009055 U CN 203009055U
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- catalyst converter
- motor
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- reducibility
- oxidability
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
An emission control system of an engine comprises an alcohol fuel engine, a reducing catalyst, an oxidizing catalyst and an alcohol ECU, wherein the alcohol fuel engine is connected with an external discharge port sequentially through an exhaust pipe, the reducing catalyst and the oxidizing catalyst, and the alcohol fuel engine is in signal connection with the alcohol ECU; when the catalyst is used, HC and CO are generated in an alcohol fuel engine and an exhaust pipe by alcohol fuel, NOx in exhaust gas is reduced into harmless nitrogen and water exhaust gas by HC in a reducing catalyst, and CO and the rest HC are oxidized into CO in an oxidizing catalyst2And water, and finally, the remaining gas is discharged from the external discharge port. The design can not only reduce the generation of PM and NOx and improve the conversion rate of NOx, but also ensure the reliability of the system and reduce the reconstruction cost of the system.
Description
Technical field
The utility model relates to a kind of emission control systems of motor pollutant, relates in particular to a kind of emission control systems of motor, specifically is applicable to by the generation of pure fuel with inhibition NOx, and reduces the discharging of PM.
Background technique
Along with social progress, the application scale of motor enlarges rapidly, and the pollutant of its discharging is recognized to the harm that environment and human body cause.For Environmental security, for the space that to protect mankind is depended on for existence, the emission control technique of motor is developed.Prior art mainly can be divided into take EGR as main EGR route and take selective catalytic reduction as main SCR route.But there is following problem in these two kinds of routes:
(1) EGR route: lead the discharging that can reduce nitrogen oxide NOx by improving EGR, but can affect the burning quality of fuel, make particle PM discharging and oil consumption worsen;
Need to introduce the after-treatment device with oxidability attribute for solving the PM discharging, as grain catcher etc., this class after-treatment device has proposed harsh requirement to the Sulpher content of fuel, requires to use low-sulfur diesel-oil;
For solving the oil consumption deterioration problem, to have to limit EGR and lead, the amplitude that NOx reduces is restricted.
(2) SCR route: by inject reducing agent in engine exhaust pipe, as urea etc., under the catalysis of catalyzer, NOx is reduced to harmless nitrogen G﹠W.This route need to be introduced reducing agent filling device, catalysis device and NOx sensor testing apparatus, not only cause the motor cost significantly to raise, the reliability of engine system also is subject to material impact, simultaneously the construction of reducing agent filling facility is claimed with universal, require universal reducing agent filling station.
The Chinese patent patent No. is that the patent of invention of ZL031405118 discloses a kind of fuel-lean type vehicular engine exhaust catalytic purifying method, and the method comprises the steps: at first to spray into methyl alcohol or ethanol in outlet pipe, makes it to mix with engine exhaust is full and uniform; Then, allow mixed gas successively by the prime catalytic bed of load type catalyst of transition metal oxide and the rear class catalytic bed of load type noble metal catalyst, realize the high-efficient purification of NOx, HC and CO, finally discharge gas up to standard.Although this invention can improve the conversion ratio of NOx, it still has following defective:
At first, what this invention was adopted is common engine, and its fuel is gasoline or diesel oil, not only can not just reduce the generation of PM and NOx in cylinder, and can't generate the HC in order to reducing NOx, has reduced the conversion ratio of NOx; Simultaneously, this invention only is conceived to the conversion of NOx, and has ignored the reduction of PM;
Secondly, exhaust in this invention is when entering the prime catalytic bed of load type catalyst of transition metal oxide, and the alcohols of injection is not decomposed into HC and CO, can only directly adopt alcohols that NOx is reduced, its reduction effect is more far short of what is expected than HC, has again reduced the conversion ratio of NOx;
Again, this invention need to be set up pure ejecting system on the basis of existing technology, not only causes the engine reformation cost significantly to raise, and causes the reliability of engine system also to be subject to material impact.
Summary of the invention
The purpose of this utility model is to overcome defective and the problem that the conversion ratio of the NOx that exists in prior art is lower, the reduction degree of PM is weak, reliability is lower, provides the conversion ratio of a kind of NOx higher, the emission control systems of the motor that the reduction degree is strong, reliability is higher of PM.
For realizing above purpose, technical solution of the present utility model is: a kind of emission control systems of motor, comprise motor, reducibility catalyst converter and oxidability catalyst converter, described motor is connected with an end of reducibility catalyst converter by outlet pipe, the other end of reducibility catalyst converter mouthful is connected with putting outward by the oxidability catalyst converter, and described motor is connected with automobile-used ECU signal;
Described motor is alcohol engine, and described automobile-used ECU comprises controlling the pure ECU that pure fuel sprays; Described alcohol engine is connected with pure ECU signal.
Described reducibility catalyst converter comprises selective catalytic reduction catalyst SCR or lean-burn NOx catalyst converter LNC.
Described oxidability catalyst converter comprises oxidation catalyzer DOC, ammonia rear oxidation catalyst converter AMOX, particulate oxidation catalyst converter POC or with the grain catcher CDPF of catalyst coatings.
Described alcohol engine comprises the motor of pure burning ethanol fuel, the motor of blend-burning ethanol fuel, or adopt EGR with the motor of pure fuel as part or all of fuel.
The set-up mode of described reducibility catalyst converter and oxidability catalyst converter comprises two kinds, is respectively: reducibility catalyst converter, oxidability catalyst converter are packaged as a whole; Or reducibility catalyst converter, oxidability catalyst converter encapsulate separately.
Compared with prior art, the beneficial effects of the utility model are:
1, the motor in the emission control systems of a kind of motor of the utility model adopts alcohol engine, this motor is take various pure fuel as fuel, alcohols belongs to oxygenated fuel, burning fully, motor with this class A fuel A as power resources, not only the PM of its discharging is significantly reduced, simultaneously, alcohol carburretion latent heat is large, and combustion temperature reduces, and the generation of NOx is had certain inhibitory action, again, in combustion process in cylinder, can also produce the HC in order to reducing NOx, improve the conversion ratio of NOx; In addition, the utility model need not set up pure ejecting system, utilizes the pure fuel combustion function of alcohol engine self to satisfy the demand, and has not only reduced the repacking cost of system, and has effectively avoided the reduction of system reliability.Therefore, the utility model can not only reduce the generation of PM, NOx, can improve the conversion ratio of NOx, and can guarantee the reliability of system, can reduce the reforming cost of system.
2, regulate by pure ECU the alcohol amount of supplying with alcohol engine in the emission control systems of a kind of motor of the utility model, not only to satisfy the use needs of alcohol engine, and to guarantee to contain in outlet pipe appropriate pure fuel to generate HC, CO, as in pure ECU calibration phase, the slightly higher needs that can satisfy pure fuel in outlet pipe of alcohol demand arteries and veins spectrum, the high emissions object of intending realization that how much depends on, this shows, rely on the accurate operation of pure ECU, not only can satisfy the basic need of motor fuel, and can be at motor, produce enough HC in outlet pipe with reducing NOx, thereby improve the conversion ratio of NOx, in addition, the pure fuel reducing NOx of comparing, utilize the effect of HC reducing NOx stronger, thereby further improve native system to the conversion ratio of NOx.Therefore, the utility model is higher to the conversion ratio of NOx.
3, first rely on the pure fuel in alcohol engine, outlet pipe to produce HC, CO in the emission control systems of a kind of motor of the utility model, utilize again the HC reducing NOx in the reducibility catalyst converter, then the CO that in the oxidability catalyst converter, pure fuel is generated and excessive HC oxidation are eliminated, its integrated artistic advantage is as follows: at first, reduced the generation of PM, NOx in motor, outlet pipe; Secondly, utilize the HC reducing NOx in the reducibility catalyst converter that generates in motor, outlet pipe, rather than utilize pure fuel, improved the conversion ratio of NOx; Again, in the oxidability catalyst converter, remaining CO and remaining HC are oxidized to CO
2And water, further purified gas, at last just from outside put mouthful and to discharge.This shows, the integrated artistic that the utility model adopts not only reduces the generation of PM, NOx from the source, and utilize HC in intermediate product to improve the conversion ratio of NOx, and guarantee the final purification of intermediate product in the oxidability catalyst converter, mutually be connected between step, contact closely finally greatly reduces the discharging of PM, NOx.Therefore, the utility model not only conversion ratio to NOx is higher, and stronger to the reduction degree of PM.
Description of drawings
Fig. 1 is structural representation of the present utility model.
In figure: alcohol engine 1, reducibility catalyst converter 2, oxidability catalyst converter 3, outlet pipe 4, put mouthfuls 5 outward, pure ECU6.
Embodiment
Below in conjunction with description of drawings and embodiment, the utility model is described in further detail.
Referring to Fig. 1, a kind of emission control systems of motor, comprise motor, reducibility catalyst converter 2 and oxidability catalyst converter 3, described motor is connected with an end of reducibility catalyst converter 2 by outlet pipe 4, the other end of reducibility catalyst converter 2 by oxidability catalyst converter 3 with put mouthfuls 5 outward and be connected, described motor is connected with automobile-used ECU signal;
Described motor is alcohol engine 1, and described automobile-used ECU comprises controlling the pure ECU6 that pure fuel sprays; Described alcohol engine 1 is connected with pure ECU6 signal.
Described reducibility catalyst converter 2 comprises selective catalytic reduction catalyst SCR or lean-burn NOx catalyst converter LNC.
Described oxidability catalyst converter 3 comprises oxidation catalyzer DOC, ammonia rear oxidation catalyst converter AMOX, particulate oxidation catalyst converter POC or with the grain catcher CDPF of catalyst coatings.
Described alcohol engine 1 comprises the motor of pure burning ethanol fuel, the motor of blend-burning ethanol fuel, or adopt EGR with the motor of pure fuel as part or all of fuel.
The set-up mode of described reducibility catalyst converter 2 and oxidability catalyst converter 3 comprises two kinds, is respectively: reducibility catalyst converter 2, oxidability catalyst converter 3 are packaged as a whole; Or reducibility catalyst converter 2, oxidability catalyst converter 3 encapsulate separately.
A kind of using method of emission control systems of above-mentioned motor, described using method comprises the following steps successively:
The first step: first drive signal to inject pure fuel in alcohol engine 1 by the pure nozzle of pure ECU6 output, burnt at alcohol engine 1 by the pure fuel that injects again, generate HC, CO and exhaust during burning, then, HC, the CO, exhaust and the remaining pure fuel that generate enter outlet pipe 4 in the lump, and in outlet pipe 4, remaining pure fuel is oxidized to HC and CO in exhaust, subsequently, HC, the CO in outlet pipe 4, exhaust enter reducibility catalyst converter 2 in the lump;
Second step: first by the above-mentioned HC that enters in reducibility catalyst converter 2, the NOx in exhaust is reduced to harmless nitrogen G﹠W, after reduction process finishes, then enters in the lump oxidability catalyst converter 3 by remaining gas;
The 3rd step: first be oxidized to CO by above-mentioned CO and the remaining HC that enters in oxidability catalyst converter 3
2And water, after oxidizing process finishes, final remaining gas from outside put mouthfuls 5 and discharge, at this moment, the using method of the emission control systems of described motor finishes.
In the described first step: pure ECU6 with rotating speed, load or single cylinder circulation oil mass, engine coolant temperature as input parameter, again according to the arteries and veins spectrogram of pure ECU6 inside to determine basic pure firing rate, then according to the emissions object of intend realizing determining final pure firing rate, and final pure firing rate is greater than basic pure firing rate.
In the described first step: in outlet pipe 4, remaining pure fuel first is oxidized to aldehyde in exhaust, and aldehyde further is oxidized to HC and CO again.
Principle of the present utility model is described as follows:
1, integrated artistic and HC reducing NOx:
The utility model overall structure comprises alcohol engine, outlet pipe, reducibility catalyst converter, oxidability catalyst converter successively.Whole purifying effect mainly is comprised of two purifying step:
One utilizes alcohol engine, at the beginning of the generation of exhaust, just reduces the generation of PM, NOx.
Alcohol engine adopts pure fuel to act as a fuel, alcohols belongs to oxygenated fuel, burning fully, as power resources, the PM of its discharging is significantly reduced motor, simultaneously with this class A fuel A, alcohol carburretion latent heat is large, combustion temperature reduces, and the generation of NOx is had certain inhibitory action, and inhibition can see the following form:
，
In table, C100, C75, C50 represent respectively 100% load, 75% load and 50% load of C rotating speed.
Its two, the HC that utilizes pure fuel to produce reduces to NOx, the advantage of this step is as follows:
A: the pure fuel reducing NOx of comparing, directly utilize HC to the better effects if of its reduction;
B: the HC in the utility model is produced in cylinder, outlet pipe by pure fuel, not only do not need to set up special spray alcohol equipment, and the main accompaniment in the HC production process is CO, there is no other harmful matters, even CO, in the subsequent oxidation catalyst converter, also can be oxidized to together CO with remaining HC
2And water, and can not be discharged away;
This shows, the utility model utilizes HC that NOx is reduced, and has realized having improved the conversion ratio of NOx fully on the basis that does not increase cost, harmful matter, and technological progress is remarkable.
2, the regulation and control of pure ECU to alcohol engine:
Utilize pure ECU that the alcohol amount of alcohol engine is adjusted in the utility model.Wherein, alcohol ECU controls the ECU that pure fuel sprays, and it is the part of automobile-used ECU, it with rotating speed, load or the parameters such as single cylinder circulation oil mass, engine coolant temperature as input, check the pure fuel flow rate of answering according to the arteries and veins spectrogram of ECU inside, export pure fuel nozzle and drive signal.Simultaneously, for guaranteeing that pure fuel also can be oxidized to HC and CO in outlet pipe, the consumption of alcohol fuel will be higher than the consumption of alcohol engine, that is: " first according to the arteries and veins spectrogram of pure ECU inside to determine basic pure firing rate; then according to the emissions object of intending realizing to determine final pure firing rate; and final pure firing rate is greater than basic pure firing rate ", high how much depending on intended the emissions object realized.
Embodiment 1:
A kind of emission control systems of motor, comprise motor, reducibility catalyst converter 2, oxidability catalyst converter 3, described motor is connected with an end of reducibility catalyst converter 2 by outlet pipe 4, the other end of reducibility catalyst converter 2 by oxidability catalyst converter 3 with put mouthfuls 5 outward and be connected, described motor is connected with automobile-used ECU signal; Described motor is alcohol engine 1, and described automobile-used ECU comprises controlling the pure ECU6 that pure fuel sprays; Described alcohol engine 1 is connected with pure ECU6 signal;
Described reducibility catalyst converter 2 comprises selective catalytic reduction catalyst SCR or lean-burn NOx catalyst converter LNC; Described oxidability catalyst converter 3 comprises oxidation catalyzer DOC, ammonia rear oxidation catalyst converter AMOX, particulate oxidation catalyst converter POC or with the grain catcher CDPF of catalyst coatings; The set-up mode of described reducibility catalyst converter 2 and oxidability catalyst converter 3 comprises two kinds, is respectively: reducibility catalyst converter 2, oxidability catalyst converter 3 are packaged as a whole; Or reducibility catalyst converter 2, oxidability catalyst converter 3 encapsulate separately;
Described alcohol engine 1 comprises the motor of pure burning ethanol fuel, the motor of blend-burning ethanol fuel, or adopt EGR with the motor of pure fuel as part or all of fuel.
A kind of using method of emission control systems of above-mentioned motor, described using method comprises the following steps successively:
The first step: first drive signal to inject pure fuel in alcohol engine 1 by the pure nozzle of pure ECU6 output, burnt at alcohol engine 1 by the pure fuel that injects again, generate HC, CO and exhaust during burning, then, HC, the CO, exhaust and the remaining pure fuel that generate enter outlet pipe 4 in the lump, in outlet pipe 4, remaining pure fuel first is oxidized to aldehyde in exhaust, aldehyde further is oxidized to HC and CO again, subsequently, HC, the CO in outlet pipe 4, exhaust enter reducibility catalyst converter 2 in the lump;
Described pure ECU6 with rotating speed, load or single cylinder circulation oil mass, engine coolant temperature as input parameter, again according to the arteries and veins spectrogram of pure ECU6 inside to determine basic pure firing rate, then according to the emissions object of intend realizing determining final pure firing rate, and final pure firing rate is greater than basic pure firing rate; Described final pure firing rate is the amount of injecting pure fuel in the alcohol engine 1;
Second step: first by the above-mentioned HC that enters in reducibility catalyst converter 2, the NOx in exhaust is reduced to harmless nitrogen G﹠W, after reduction process finishes, then enters in the lump oxidability catalyst converter 3 by remaining gas;
The 3rd step: first be oxidized to CO by above-mentioned CO and the remaining HC that enters in oxidability catalyst converter 3
2And water, after oxidizing process finishes, final remaining gas from outside put mouthfuls 5 and discharge, at this moment, the using method of the emission control systems of described motor finishes.
Claims (5)
1. the emission control systems of a motor, comprise motor, reducibility catalyst converter (2) and oxidability catalyst converter (3), described motor is connected by the end of outlet pipe (4) with reducibility catalyst converter (2), the other end of reducibility catalyst converter (2) by oxidability catalyst converter (3) with put mouthful (5) outward and be connected, described motor is connected with automobile-used ECU signal, it is characterized in that:
Described motor is alcohol engine (1), and described automobile-used ECU comprises controlling the pure ECU(6 that pure fuel sprays); Described alcohol engine (1) and pure ECU(6) signal is connected.
2. the emission control systems of a kind of motor according to claim 1, it is characterized in that: described reducibility catalyst converter (2) comprises selective catalytic reduction catalyst SCR or lean-burn NOx catalyst converter LNC.
3. the emission control systems of a kind of motor according to claim 1 is characterized in that: described oxidability catalyst converter (3) comprises oxidation catalyzer DOC, ammonia rear oxidation catalyst converter AMOX, particulate oxidation catalyst converter POC or with the grain catcher CDPF of catalyst coatings.
4. the emission control systems of a kind of motor according to claim 1, it is characterized in that: described alcohol engine (1) comprises the motor of pure burning ethanol fuel, the motor of blend-burning ethanol fuel, or adopt EGR with the motor of pure fuel as part or all of fuel.
5. the emission control systems of 2,3 or 4 described a kind of motors according to claim 1,, it is characterized in that: the set-up mode of described reducibility catalyst converter (2) and oxidability catalyst converter (3) comprises two kinds, is respectively: reducibility catalyst converter (2), oxidability catalyst converter (3) are packaged as a whole; Or reducibility catalyst converter (2), oxidability catalyst converter (3) encapsulation separately.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206351192U CN203009055U (en) | 2012-11-27 | 2012-11-27 | Emission control system of engine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206351192U CN203009055U (en) | 2012-11-27 | 2012-11-27 | Emission control system of engine |
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| CN203009055U true CN203009055U (en) | 2013-06-19 |
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| CN2012206351192U Expired - Lifetime CN203009055U (en) | 2012-11-27 | 2012-11-27 | Emission control system of engine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102943715A (en) * | 2012-11-27 | 2013-02-27 | 东风汽车有限公司 | Emission control system of engine and using method thereof |
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- 2012-11-27 CN CN2012206351192U patent/CN203009055U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102943715A (en) * | 2012-11-27 | 2013-02-27 | 东风汽车有限公司 | Emission control system of engine and using method thereof |
| CN102943715B (en) * | 2012-11-27 | 2016-01-20 | 东风汽车公司 | A kind of emission control systems of motor and using method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: DONGFENG CAR CO. Free format text: FORMER OWNER: DONGFENG AUTOMOBILE CO., LTD. Effective date: 20130722 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20130722 Address after: 430056 Wuhan economic and Technological Development Zone, Hubei Province, Dongfeng Road, No. 1, No. Patentee after: Dongfeng Motor Corporation Address before: 430056 Dongfeng Road, Wuhan Economic Development Zone, Hanyang District, Hubei, China, No. 10, No. Patentee before: DONGFENG MOTER Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 430056 No. 1 Dongfeng Avenue, Wuhan economic and Technological Development Zone, Hubei, Wuhan Patentee after: DONGFENG MOTOR Corp. Address before: 430056 No. 1 Dongfeng Avenue, Wuhan economic and Technological Development Zone, Hubei, Wuhan Patentee before: Dongfeng Motor Corporation |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130619 |