CN204419320U - A kind of automobile exhaust gas processing apparatus - Google Patents
A kind of automobile exhaust gas processing apparatus Download PDFInfo
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- CN204419320U CN204419320U CN201420755845.7U CN201420755845U CN204419320U CN 204419320 U CN204419320 U CN 204419320U CN 201420755845 U CN201420755845 U CN 201420755845U CN 204419320 U CN204419320 U CN 204419320U
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- Prior art keywords
- urea
- catalytic reduction
- selective catalytic
- processing apparatus
- exhaust gas
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Links
- 238000012545 processing Methods 0.000 title claims abstract description 56
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 113
- 238000002347 injection Methods 0.000 claims abstract description 81
- 239000007924 injection Substances 0.000 claims abstract description 81
- 239000004202 carbamide Substances 0.000 claims abstract description 62
- 238000001514 detection method Methods 0.000 claims abstract description 46
- 238000000034 method Methods 0.000 claims abstract description 20
- 239000007921 spray Substances 0.000 claims abstract description 20
- 239000007789 gas Substances 0.000 claims description 135
- 238000010531 catalytic reduction reaction Methods 0.000 claims description 88
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims description 37
- 239000003054 catalyst Substances 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 8
- 238000012544 monitoring process Methods 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 239000010763 heavy fuel oil Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000003344 environmental pollutant Substances 0.000 abstract description 11
- 231100000719 pollutant Toxicity 0.000 abstract description 11
- 230000008054 signal transmission Effects 0.000 abstract description 5
- 235000013877 carbamide Nutrition 0.000 description 52
- 230000000694 effects Effects 0.000 description 8
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 4
- 229910021529 ammonia Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- -1 NOx compound Chemical class 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 230000005226 mechanical processes and functions Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 238000000110 selective laser sintering Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 210000002700 urine Anatomy 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Landscapes
- Exhaust Gas After Treatment (AREA)
Abstract
The utility model relates to a kind of automobile exhaust gas processing apparatus, comprise suction tude, outlet pipe, SCR postprocessor, urea storage device, also comprise engine controlling unit and urea-spray device, also can comprise SCR detection control apparatus, urea-spray device comprises urea-injection control device and injection pipe, engine controlling unit detects the signals such as the tail gas of motor discharge and is sent to urea-injection control device, injection pipe is connected with urea storage device by pipeline, one end that injection pipe is connected with exhaust emission pipe is connected with shower nozzle, SCR postprocessor is arranged in the downstream along exhaust emissions direction upper nozzle, SCR detection control apparatus detects the vehicle exhaust signal after SCR postprocessor process, and other parts are controlled or by signal transmission to urea-injection control device, and then control, the injection situation of adjustment urea, to improve the treatment effeciency of pollutant in tail gas, make vent gas treatment more thorough, less to the pollution of environment.
Description
Technical field
The utility model belongs to vehicle maintenance service technical field, a kind of automobile exhaust gas processing apparatus of specific design.
Background technique
Selective catalytic reduction (Selective Catalytic Reduction, SCR) refers under the effect of catalyzer, utilizes reducing agent (as NH
3, liquefied ammonia, urea) come " selective " with the NO in flue gas
xreact and generate the N of nontoxic pollution-free
2and H
2o.This carries out a kind of method that treating tail gas generally adopts at present.
Along with developing rapidly of auto electronics industry and traffic, the owning amount of people to automobile also increases severely day by day, vehicle exhaust discharge quantity increase the weight of the difficulty increasing environmental improvement, in order to reduce the exhaust emission of vehicle exhaust, adopt and select the exhaust gas processing device of selective catalytic reduction (SCR) that particulate matter (PM) in tail gas can be reduced preferably and nitrogen oxide (NO_x) discharges, the severse weather such as effectively contain each big city haze, global weather warms.
Take urea as the ejecting system that the SCR aftertreatment system of reducing agent comprises urea, the ejecting system of urea sprays in outlet pipe by appropriate urea, can well react with the nitrogen oxide in waste gas, this needs the jet pressure of accurately control urea, emitted dose and discharge time.But in prior art, be detect tail gas signal by sensor, and tail gas signal is directly passed to metering pump, metering pump can control the injection of urea to a certain extent, but the precision of its processes sensor signal is also not accurate enough, this gives in actual mechanical process and brings very large trouble.
Notification number is that the Chinese utility model patent of CN202417665U discloses a kind of diesel motor exhaust after-treatment system, comprise the selective catalytic reduction SCR postprocessor be connected with motor by suction tude, the gas holder of selective catalytic reduction SCR reprocessing is provided with nitrogen oxide sensor and temperature transducer, suction tude is provided with the urea nozzle identical with it and temperature transducer, nitrogen oxide sensor and temperature transducer send corresponding testing signal to urea control unit in time, the urea spray feed amount of urea nozzle and the temperature of pending tail gas is adjusted in time according to the signal received by urea control unit.
Notification number is the Chinese utility model patent of CN203499777U, disclose a kind of pneumatic type urea injection system, this system comprises urea tank, provides the source of the gas of jet pressure, control unit, and the gas piping of device connection function, urea pipe and automatically controlled circuit; Urea pipe one end connects urea tank, and the other end connects carbamide injection valve; Gas piping comprises gas one tunnel, gas two road and gas three tunnel; Automatically controlled circuit comprises one end and is all connected with control unit, each automatically controlled branch road that the other end is connected with the nitrogen oxide sensor of SCR postprocessor rear end respectively at three solenoid valves, urea tank sensor, carbamide injection valve and the exhaust temperature sensor that is arranged on SCR postprocessor front end on outlet pipe.
In prior art, only by the original tail gas signal of detection, control by using the injection of its system of urea-spray to urea, not detecting the tail gas after reacting with urea, in this case, or is that vent gas treatment is thorough not, that urea is excessive, waste resource.
Therefore, in order to meet the demand of Vehicles Collected from Market, needing to develop novel automobile exhaust gas processing apparatus, the treatment effect of tail gas can be improved, and reaching the object economized on resources.
Summary of the invention
In order to solve the deficiency that prior art exists, the utility model provides a kind of automobile exhaust gas processing apparatus, comprise suction tude, outlet pipe, selective catalytic reduction preprocessor, urea storage device, described automobile exhaust gas processing apparatus also comprises engine controlling unit and urea-spray device, one end of described engine controlling unit connects with engine export, and the other end connects with described urea-spray device; Described urea-spray device comprises urea-injection control device and injection pipe; Described injection pipe is connected with described urea storage device by pipeline, and one end that described injection pipe is connected with exhaust emission pipe is connected with shower nozzle; Described selective catalytic reduction preprocessor is arranged in the downstream of described shower nozzle on toxic emission direction.Urea-spray enters in described selective catalytic reduction preprocessor by described shower nozzle, to react with the pollutant in tail gas.
Described engine controlling unit detects the state of motor, the tail gas signal of motor discharge and surrounding signals, and send the signal detected to connected urea-injection control device, referential data is provided for controlling urea-spray, described urea-injection control device, according to the signal received, controls in advance to the emitted dose of urea, discharge time, jet pressure.Usually, in tail gas, the concentration of pollutant is high, then need jet pressure comparatively large, can make pollutant and urea rapid mixing so evenly, be conducive to the carrying out reacted in selective catalytic reduction preprocessor; Also corresponding relation is there is in urea injecting quantity and discharge time to the concentration of pollutant in tail gas.The working state of motor is different, surrounding environment is different, and the exhaust pollutant content of discharge is different, correspondingly tackles the emitted dose of urea, discharge time and jet pressure and adjusts accordingly, and obtains best treatment effect with the urea reaching minimum flow.Urea-injection control device then can carry out real-time control, adjustment according to engine controlling unit to the injection of urea.
Preferably, described engine controlling unit is replaced by selective catalytic reduction detection control apparatus, described selective catalytic reduction detection control apparatus connects with described selective catalytic reduction preprocessor, and described selective catalytic reduction detection control apparatus comprises tail gas signal supervisory instrument and selective catalytic reduction controller.
Described catalytic reduction detection control apparatus detects the tail gas after the process of selective catalytic reduction preprocessor, and by Selective catalytic reduction controller wherein, other parts are controlled, extend the reaction time or adjust urea-spray situation to improve reaction efficiency, for vent gas treatment effect provides foundation more accurately, make vent gas treatment more thorough, less to the pollution of environment.
Above-mentioned either a program, preferably, also comprise selective catalytic reduction detection control apparatus, described selective catalytic reduction detection control apparatus connects with described selective catalytic reduction preprocessor, and described selective catalytic reduction detection control apparatus comprises tail gas signal supervisory instrument and selective catalytic reduction controller.
Engine controlling unit is combined with selective catalytic reduction detection control apparatus, described engine controlling unit provides reference value in advance for urea-spray, the treatment effect of described selective catalytic reduction detection control apparatus to tail gas is monitored in real time, for vent gas treatment provides further information, and by Selective catalytic reduction controller wherein, other parts are controlled, extend the reaction time or adjust urea-spray situation to improve reaction efficiency, for further vent gas treatment effect provides foundation more accurately, make vent gas treatment more thorough, less to the pollution of environment.
Above-mentioned either a program, preferably, the air outlet place of described selective catalytic reduction preprocessor is provided with valve, and described selective catalytic reduction controller is valve positioner.
Described valve positioner by control valve, extends the waiting time of tail gas in selective catalytic reduction preprocessor, thus reaches and react more thoroughly object, and then improves vent gas treatment effect, reduces the pollution to environment.If the tail gas indices after the process of selective catalytic reduction preprocessor reaches standard, then valve is in opening-wide state, tail gas smooth discharge; If pollutant still exceeds standard or higher in the tail gas after the process of selective catalytic reduction preprocessor, then valve is in the state of closedown, makes the extended residence time of tail gas in selective catalytic reduction preprocessor, thus makes reaction more thorough.
Above-mentioned either a program, preferably, described selective catalytic reduction detection control apparatus connects with described urea-injection control device.
Selective catalytic reduction detection control apparatus sends the signal detected to urea-injection control device, urine institute ejection control device controls the jet pressure of urea, emitted dose and discharge time according to the signal received, its Stability and veracity is higher, Safety performance is high, arrange conveniently, processing ease.
Above-mentioned either a program, preferably, described SCR detection control apparatus is arranged in the end of described SCR postprocessor, detects the signal of the tail gas emitted from selective catalytic reduction preprocessor, so the signal detected is more accurate.
Above-mentioned either a program, preferably, described exhaust emission content detection device comprises sensor, detects vehicle exhaust signal by described sensor, and the tail gas signal detected is converted, judged, and realize the discharge of tail gas by described valve positioner or process further.
Above-mentioned either a program, preferably, described sensor comprises the sensor of monitoring nitrogen oxide in tail gas content and the temperature transducer of monitoring catalyst temperature change.
Above-mentioned either a program, preferably, the storage device of described urea is provided with temperature transducer, pressure transducer and liquid level sensor, and described temperature transducer, pressure transducer and liquid level sensor pass through connection with described urea-injection control device respectively.
Above-mentioned either a program, preferably, described urea-injection control device and warning indicator pass through connection; When the content of urea is lower than setting value, urea-injection control device can send pulse duration modulation (PWM) signal, and pwm signal is transferred to warning indicator.When warning device is reported to the police, staff supplements urea in time, and maintain the normal operation of equipment, Security is high.
Above-mentioned either a program, preferably, described warning indicator is alarm indicator lamp.
Above-mentioned either a program, preferably, described warning indicator is alarm bell.
Above-mentioned either a program, preferably, described setting value is that the storage volume of urea is lower than 10% of storage device capacity.
Above-mentioned either a program, preferably, described urea-injection control device is connected by circuit with engine controlling unit, and described urea-injection control device receives controller local area network (Controller Area Network, CAN) bus signals.
Above-mentioned either a program, preferably, described CAN signal comprises the signal of diesel combustion material.
Above-mentioned either a program, preferably, described setting value is that the distance that the storage volume of urea can be exercised is less than the distance that in diesel engine, residual fuel can be exercised.
Above-mentioned either a program, preferably, described injection pipe connected electromagnetic valve, described solenoid valve and described urea-injection control device by connection, and by the switch of described urea-injection control device Controlling solenoid valve.
Above-mentioned either a program, preferably, described tail gas signal comprises the temperature of tail gas, discharge capacity and airspeed.
Above-mentioned either a program, preferably, described urea-injection control device is selective laser sintering device.
Above-mentioned either a program, preferably, described SCR postprocessor comprises SCR small controller, catalyst carrier, catalyst support coatings.
In the automobile exhaust gas processing apparatus that the utility model provides, engine controlling unit can detect the temperature of engine discharging tail gas, discharge capacity and airspeed etc., for urea-spray provides reference value, and SCR detection control apparatus can tail gas signal accurately after check processing signal is sent to urea-injection control device, urea-spray is controlled, adjustment, or control other constituent elements (as valve) by selective catalytic reduction controller, make reaction efficiency improve or the time longer, thus reach vent gas treatment more thoroughly effect, improve the handling rate to NOx compound and ammonia react rate, the novel automobile exhaust gas processing apparatus provided of this use can reach more than 80% to the treatment effeciency of tail gas, and also with regard to about 60% in prior art, the utility model can reach the consumption of urea and minimize simultaneously, energy saving, the utility model can in nitrogen oxide (NOx) discharge in the prerequisite decline low exhaust gas of not sacrificing Economy, the severse weather such as effectively contain each big city haze, global weather warms.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a preferred embodiment of the automobile exhaust gas processing apparatus provided according to the utility model.
Fig. 2 is the schematic diagram of another preferred embodiment of the automobile exhaust gas processing apparatus provided according to the utility model.
Fig. 3 is the schematic diagram of another preferred embodiment of the automobile exhaust gas processing apparatus provided according to the utility model.
Wherein, the implication of each label is as follows:
1-suction tude, 2-outlet pipe, 3-selective catalytic reduction (SCR) preprocessor, 4-urea storage device, 5-alarm indicator lamp, 6-shower nozzle, 7-selective catalytic reduction (SCR) detection control apparatus, 8-engine controlling unit, 9-urea-injection control device, 10-solenoid valve, 11-injection pipe, 12-valve.
Embodiment
In order to understand, illustrating content of the present utility model further, below in conjunction with specific embodiment and accompanying drawing the utility model done and set forth in more detail.
Embodiment 1.1
A kind of tailed-gas treater of automobile, as shown in Figure 1, comprise suction tude 1, outlet pipe 2, selective catalytic reduction preprocessor 3, urea storage device 4, also comprise engine controlling unit 8 and urea-spray device, urea-spray device 9 comprises urea-injection control device 9 and injection pipe 11; One end of engine controlling unit 8 connects with engine export, and the other end connects with urea-spray device 9; Injection pipe 11 is connected with urea storage device 4 by pipeline, and one end that injection pipe 11 is connected with exhaust emission pipeline is connected with shower nozzle 6; Selective catalytic reduction preprocessor 3 is arranged in the downstream along exhaust emissions direction upper nozzle 6.
In the present embodiment, urea storage device 4 is provided with temperature transducer, pressure transducer and liquid level sensor, and described temperature transducer, pressure transducer and liquid level sensor pass through connection with urea-injection control device respectively.
In the present embodiment, urea-injection control device 9 and warning indicator pass through connection; When the content of urea is lower than setting value, urea-injection control device 9 can send pwm signal, and pwm signal is transferred to warning indicator.
In the present embodiment, described warning indicator is alarm indicator lamp 5.
In the present embodiment, described setting value is that the storage volume of urea is lower than 10% of storage device capacity.
In the present embodiment, urea-injection control device 9 and engine controlling unit 8 are by connection, and urea-injection control device 9 receives CAN signal.
In the present embodiment, described CAN signal comprises the signal of diesel combustion material.
In the present embodiment, injection pipe 11 is connected with solenoid valve 10 and shower nozzle 6, solenoid valve 10 and urea-injection control device 9 by connection, and by the switch of urea-injection control device 9 Controlling solenoid valve 10.
In the present embodiment, described tail gas signal comprises the temperature of tail gas, discharge capacity and airspeed.
In the present embodiment, described urea-injection control device 9 is microprogram control unit.
In the present embodiment, described SCR postprocessor comprises SCR small controller, catalyst carrier, catalyst support coatings.
The automobile exhaust gas processing apparatus that the present embodiment provides, reaches 80% to the treatment effeciency of tail gas.
Embodiment 1.2
A kind of automobile exhaust gas processing apparatus, with embodiment 1.1 unlike: in the present embodiment, setting value is that the distance that the storage volume of urea can be exercised is less than the distance that in diesel engine, residual fuel can be exercised.
Setting value can also set other numerical value according to the specific requirement of user, as: setting value is the capacity of storage volume lower than other percentages of storage device of urea, and this percentage should be high with 10%.
Embodiment 2.1
A kind of automobile exhaust gas processing apparatus, as shown in Figure 2, with embodiment 1.1 unlike, engine controlling unit 8 is replaced by selective catalytic reduction detection control apparatus 7, selective catalytic reduction detection control apparatus 7 connects with selective catalytic reduction preprocessor 3, selective catalytic reduction detection control apparatus 7 comprises tail gas signal supervisory instrument and selective catalytic reduction controller, described tail gas input detection device comprises sensor, vehicle exhaust signal is detected by described sensor, and the tail gas signal detected is converted, judge, and realize the discharge of tail gas by described valve positioner or process further, the air outlet place of described selective catalytic reduction preprocessor is provided with valve 12, selective catalytic reduction detection control apparatus 7 is arranged in the end of selective catalytic reduction preprocessor 3, selective catalytic reduction controller 7 is valve positioner, the on off state of valve positioner controllable valve door 12, when in the tail gas after process, pollutant load reaches standard, valve positioner makes valve 12 be in opening-wide state, ensure the normal discharge of tail gas, when process after tail gas in pollutant content overproof or higher time, valve positioner control valve 12 is in closed condition, extend the SCR processing time.And the treatment effeciency of the automobile exhaust gas processing apparatus that the present embodiment provides to tail gas reaches 85%.
Embodiment 2.2
A kind of automobile exhaust gas processing apparatus, with embodiment 2.1 unlike, the air outlet place of selective catalytic reduction preprocessor 3 does not have valve 12, selective catalytic reduction detection control apparatus 7 only connects with urea-injection control device 9, selective catalytic reduction detection control apparatus 7 detect selective catalytic reduction preprocessor 3 process rear tail gas signal and by the signal transmission that detects to urea-injection control device 9, urea-injection control device 9, according to the signal received, controls the jet pressure of urea, discharge time and injection two, adjusts.The treatment effeciency of the automobile exhaust gas processing apparatus that the present embodiment provides to tail gas reaches 86%.
Embodiment 2.3
A kind of automobile exhaust gas processing apparatus, with embodiment 2.1 unlike, selective catalytic reduction detection control apparatus 7 also connects with described urea-injection control device, selective catalytic reduction detection control apparatus 7 detects the signal that selective catalytic reduction preprocessor 3 processes rear tail gas, by valve positioner, valve 12 is controlled simultaneously, make it close or open wide, and by the signal transmission that detects to urea-injection control device 9, urea-injection control device 9 is according to the signal received, to the jet pressure of urea, discharge time and injection two control, adjustment.The treatment effeciency of the automobile exhaust gas processing apparatus that the present embodiment provides to tail gas reaches 89%.
In the tailed-gas treater of automobile provided in embodiment, SCR detection control apparatus 7 can receive the temperature of engine discharging tail gas accurately, discharge capacity and airspeed, and be transferred to SCR postprocessor 3 in time, by the process of SCR postprocessor 3, again fast and accurately by information transmission to urea-injection control device 9, urea-injection control device 9 is according to the tail gas information received, and in conjunction with the information of urea and the information of engine controlling unit 8 conveying, effectively control the injection of urea liquid, reasonably to adjust the jet pressure of urea liquid accurately, emitted dose and discharge time, improve the handling rate to NOx compound and ammonia react rate, the utility model can in nitrogen oxide (NOx) discharge in the prerequisite decline low exhaust gas of not sacrificing Economy, the severse weather such as effectively contain each big city haze, global weather warms.
Embodiment 3.1
A kind of automobile exhaust gas processing apparatus, as shown in Figure 3, with embodiment 1.1 unlike, also comprise selective catalytic reduction detection control apparatus 7, selective catalytic reduction detection control apparatus 7 connects with selective catalytic reduction preprocessor 3, selective catalytic reduction detection control apparatus 7 comprises tail gas signal supervisory instrument and selective catalytic reduction controller, described tail gas input detection device comprises sensor, vehicle exhaust signal is detected by described sensor, and the tail gas signal detected is converted, judge, and realize the discharge of tail gas by described valve positioner or process further, the air outlet place of selective catalytic reduction preprocessor 3 is provided with valve 12, selective catalytic reduction controller is valve positioner, the on off state of valve positioner controllable valve door 12, when pollutant load in the tail gas after process, to reach your valve positioner of standard be that valve 12 is in opening-wide state, ensure the normal discharge of tail gas, when pollutant in the tail gas after processing content overproof or higher time, valve positioner control valve 12 is in closed condition, and extend the SCR processing time, and the treatment effeciency of the automobile exhaust gas processing apparatus that the present embodiment provides to tail gas reaches 95%.
Embodiment 3.2
A kind of automobile exhaust gas processing apparatus, with embodiment 3.1 unlike, the air outlet place of selective catalytic reduction preprocessor 3 does not have valve, selective catalytic reduction detection control apparatus 7 only connects with urea-injection control device 9, selective catalytic reduction detection control apparatus 7 detect selective catalytic reduction preprocessor 3 process rear tail gas signal and by the signal transmission that detects to urea-injection control device 9, urea-injection control device 9, according to the signal received, controls the jet pressure of urea, discharge time and injection two, adjusts.The treatment effeciency of the automobile exhaust gas processing apparatus that the present embodiment provides to tail gas reaches 93%.
Embodiment 3.3
A kind of automobile exhaust gas processing apparatus, with embodiment 3.1 unlike, selective catalytic reduction detection control apparatus 7 also connects with urea-injection control device 9, the signal of tail gas after the process of selective catalytic reduction detection control apparatus detection selective catalytic reduction, by valve positioner, valve is controlled simultaneously, make it close or open wide, and by the signal transmission that detects to urea-injection control device 9, urea-injection control device 9, according to the signal received, controls the jet pressure of urea, discharge time and injection two, adjusts.The treatment effeciency of the automobile exhaust gas processing apparatus that the present embodiment provides to tail gas reaches 98%.
Embodiment 4.1
A kind of automobile exhaust gas processing apparatus, as different from Example 1, described warning indicator is alarm bell.
Embodiment 4.2
A kind of automobile exhaust gas processing apparatus, with embodiment 2.2 unlike, described warning indicator is alarm bell.
Embodiment 4.3
A kind of automobile exhaust gas processing apparatus, with embodiment 2.3 unlike, described warning indicator is alarm bell.
Embodiment 4.4
A kind of automobile exhaust gas processing apparatus, with embodiment 3.2 unlike, described warning indicator is alarm bell.
Embodiment 4.5
A kind of automobile exhaust gas processing apparatus, with embodiment 3.3 unlike, described warning indicator is alarm bell.
It should be noted that; below are all preferred embodiments of the present utility model; only in order to explain, summary of the invention of the present utility model is described; not in order to limit the utility model; in specific operation process; on basis of the present utility model, those skilled in the art can revise with making some unsubstantialities according to actual needs, and these amendments all should belong to the scope of the utility model protection.
Claims (19)
1. an automobile exhaust gas processing apparatus, comprises suction tude, outlet pipe, selective catalytic reduction preprocessor, urea storage device, it is characterized in that, also comprises engine controlling unit and urea-spray device; One end that described urea-spray device comprises engine controlling unit described in urea-injection control device and injection pipe connects with engine export, and the other end connects with described urea-injection control device; Described injection pipe is connected with described urea storage device by pipeline, and one end that described injection pipe is connected with exhaust emission pipe is connected with shower nozzle; Described selective catalytic reduction preprocessor is arranged in the downstream of described shower nozzle on exhaust emissions direction.
2. automobile exhaust gas processing apparatus as claimed in claim 1, it is characterized in that, described engine controlling unit is replaced by selective catalytic reduction detection control apparatus, described selective catalytic reduction detection control apparatus connects with described selective catalytic reduction preprocessor, and described selective catalytic reduction detection control apparatus comprises tail gas signal supervisory instrument and selective catalytic reduction controller.
3. automobile exhaust gas processing apparatus as claimed in claim 1, it is characterized in that, also comprise selective catalytic reduction detection control apparatus, described selective catalytic reduction detection control apparatus connects with described selective catalytic reduction preprocessor, and described selective catalytic reduction detection control apparatus comprises tail gas signal supervisory instrument and selective catalytic reduction controller.
4. automobile exhaust gas processing apparatus as claimed in claim 2 or claim 3, it is characterized in that, the air outlet place of described selective catalytic reduction preprocessor is provided with valve, and described selective catalytic reduction controller is valve positioner.
5. automobile exhaust gas processing apparatus as claimed in claim 2 or claim 3, it is characterized in that, described selective catalytic reduction detection control apparatus connects with described urea-injection control device.
6. automobile exhaust gas processing apparatus as claimed in claim 2 or claim 3, it is characterized in that, described selective catalytic reduction detection control apparatus is arranged in the end of described selective catalytic reduction preprocessor.
7. automobile exhaust gas processing apparatus as claimed in claim 4, it is characterized in that, described tail gas input detection device comprises sensor, vehicle exhaust signal is detected by described sensor, and the tail gas signal detected is converted, judged, and realize the discharge of tail gas by described valve positioner or process further.
8. automobile exhaust gas processing apparatus as claimed in claim 7, is characterized in that, described sensor comprises the sensor of monitoring nitrogen oxide in tail gas content and the temperature transducer of monitoring catalyst temperature change.
9. the automobile exhaust gas processing apparatus as described in claim 1 or 2 or 3, it is characterized in that, the storage device of described urea is provided with temperature transducer, pressure transducer and liquid level sensor, and described temperature transducer, pressure transducer and liquid level sensor pass through connection with described urea-injection control device respectively.
10. the automobile exhaust gas processing apparatus as described in claim 1 or 2 or 3, it is characterized in that, described urea-injection control device and warning indicator pass through connection; When the content of urea is lower than setting value, urea-injection control device can send pwm signal, and pwm signal is transferred to warning indicator.
11. automobile exhaust gas processing apparatus as claimed in claim 10, it is characterized in that, described warning indicator is alarm indicator lamp.
12. automobile exhaust gas processing apparatus as claimed in claim 10, is characterized in that, described setting value is that the storage volume of urea is lower than 10% of storage device capacity.
13. automobile exhaust gas processing apparatus as claimed in claim 10, it is characterized in that, described urea-injection control device is connected by circuit with engine controlling unit, and described urea-injection control device receives CAN signal.
14. automobile exhaust gas processing apparatus as claimed in claim 13, it is characterized in that, described CAN signal comprises the signal of diesel combustion material.
15. automobile exhaust gas processing apparatus as claimed in claim 10, is characterized in that, described setting value is that the distance that the storage volume of urea can be exercised is less than the distance that in diesel engine, residual fuel can be exercised.
16. automobile exhaust gas processing apparatus as described in claim 1 or 2 or 3, it is characterized in that, described injection pipe connected electromagnetic valve, described solenoid valve and described urea-injection control device by connection, and by the switch of described urea-injection control device Controlling solenoid valve.
17. automobile exhaust gas processing apparatus as described in claim 1 or 2 or 3, is characterized in that, described tail gas signal comprises the temperature of tail gas, discharge capacity and airspeed.
18. automobile exhaust gas processing apparatus as described in claim 1 or 2 or 3, it is characterized in that, described urea-injection control device is microprogram control unit.
19. automobile exhaust gas processing apparatus as claimed in claim 2 or claim 3, it is characterized in that, described selective catalytic reduction preprocessor comprises selective catalytic reduction small controller, catalyst carrier, catalyst support coatings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420755845.7U CN204419320U (en) | 2014-12-05 | 2014-12-05 | A kind of automobile exhaust gas processing apparatus |
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| CN201420755845.7U CN204419320U (en) | 2014-12-05 | 2014-12-05 | A kind of automobile exhaust gas processing apparatus |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108868982A (en) * | 2018-09-03 | 2018-11-23 | 王随朝 | Diesel-driven generator alert process device and exhaust gas processing device |
| CN111058928A (en) * | 2019-12-18 | 2020-04-24 | 广州城市职业学院 | SCR urea injection system trouble real time monitoring feedback equipment |
| CN113062790A (en) * | 2020-07-03 | 2021-07-02 | 佛冈鼎立气体有限公司 | Electronic control supply system using ammonia as SCR reducing agent |
| CN117927398A (en) * | 2024-03-21 | 2024-04-26 | 潍柴动力股份有限公司 | Tail gas recirculation control system, method, electronic equipment and medium |
-
2014
- 2014-12-05 CN CN201420755845.7U patent/CN204419320U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108868982A (en) * | 2018-09-03 | 2018-11-23 | 王随朝 | Diesel-driven generator alert process device and exhaust gas processing device |
| CN111058928A (en) * | 2019-12-18 | 2020-04-24 | 广州城市职业学院 | SCR urea injection system trouble real time monitoring feedback equipment |
| CN113062790A (en) * | 2020-07-03 | 2021-07-02 | 佛冈鼎立气体有限公司 | Electronic control supply system using ammonia as SCR reducing agent |
| CN117927398A (en) * | 2024-03-21 | 2024-04-26 | 潍柴动力股份有限公司 | Tail gas recirculation control system, method, electronic equipment and medium |
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