CN101984228A - Mechanical pump type SCR urea spraying system - Google Patents
Mechanical pump type SCR urea spraying system Download PDFInfo
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- CN101984228A CN101984228A CN2010105147339A CN201010514733A CN101984228A CN 101984228 A CN101984228 A CN 101984228A CN 2010105147339 A CN2010105147339 A CN 2010105147339A CN 201010514733 A CN201010514733 A CN 201010514733A CN 101984228 A CN101984228 A CN 101984228A
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- urea
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- pump
- mechanical pump
- cooling unit
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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
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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
- 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
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- Exhaust Gas After Treatment (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The invention relates to a mechanical pump type SCR urea spraying system, consisting of a urea tank, a urea tank switch valve, a filter, a urea pump, an energy accumulator, a urea nozzle, a heat exchanger, a pressure regulating valve, a cooling device, and an electronic control unit. The system is characterized in that the urea pump is a mechanical pump, and the driving wheel of a diesel engine drives the transmission shaft of the urea pump through a pulley. A urea cooling device consists of the cooling device, a temperature control valve, a refrigerant inlet pipe and a refrigerant outlet pipe. The urea cooling device is arranged between the pressure regulating valve and the switch valve of the main pipeline. The energy accumulator is arranged on the pipeline between the outlet of the urea nozzle and the pressure regulating valve. The refrigerant inlet pipe of the urea cooling device is connected with the high pressure pipe of the automotive air conditioning, the refrigerant outlet pipe is connected with the low pressure pipe of the air conditioning, and the flow direction of the refrigerant fluid is opposite to the flow direction of the urea solution. The system of the invention reduces the energy consumption, and the flow rate of the urea solution is regulated in real time according to the engine speed, thereby avoiding the waste of the energy. The mechanical pump also has the advantages of low cost, long service life and is convenient to maintain.
Description
Technical field
The present invention relates to a kind of mechanical pump formula SCR urea-spray system, the SCR urea-spray system that is used for diesel exhaust aftertreatment, more particularly, relate to a kind of selective catalytic reduction system operating (Selective Catalyst Reduction) that is used to reduce the Diesel NOx discharging, it belongs to the internal-combustion engines exhaust gas purifying system.
Background technique
At the effulent of Motor Vehicle, people adopt various method means to eliminate the harmful matter that it contains.The SCR technology is to reduce diesel engine NO
XA kind of very effective method of discharging.Motor SCR post-processing technology is that the reducing agent aqueous solution of urea is injected in the engine exhaust, and under the effect of exhaust gas temperature and air-flow, urea can decompose fast and discharges ammonia, with NO
XReduction becomes nitrogen, reaches to reduce NO
XEffect.Aqueous solution of urea obtains people's popularization and use owing to having advantages such as stable performance, simple, the required reducing agent relative quantity of chemical reaction are few.
Urea liquid as reducing agent is stored in the urea liquid case, open: as to adopt the boost in pressure of DC electropump with urea liquid, in engine exhaust pipe, spray, the US6273120B1 patent specification of Siemens has been announced a kind of technology that adopts urea pump to give the urea liquid boost pressure, the pressure of urea liquid is improved, under air is auxiliary, spray.Also disclosing does not have the air support with urea liquid and is dispensed directly into technological scheme in the outlet pipe.
A common feature of these technological schemes is to adopt DC electropump to pressurize to urea liquid, owing to need storage battery power supply, has therefore consumed the electric energy of vehicle.And the electric energy on the car is produced by motor, passed through mechanical energy-electric energy-mechanical transformation of energy, the part loss must be arranged, adopt adjustable motor-drive pump to need extra control system, the motor-drive pump of employing fixed rotating speed then motor-drive pump is in full load condition all the time, can not carry out the flow timely adjustment according to the rotating speed of motor, energy consumption is than higher.
Adopt the urea liquid system of direct injection, urea nozzle is directly installed on the mixer of outlet pipe, the too high meeting of engine exhaust temperature causes the damage of urea nozzle, must cool off urea liquid, disclosed technology adopts urea liquid to cool off urea nozzle, and after urea liquid and nozzle and the outlet pipe heat exchange, temperature raises, the precision of metering is sprayed in influence, need cool off urea liquid.
Summary of the invention
The objective of the invention is to be to provide a kind of mechanical pump formula SCR urea-spray system, the power resources that promptly drive urea pump are in motor, urea liquid after the employing car air conditioner heat exchanging cools off, can effectively improve the efficient of cooler, fully reduce the temperature of urea liquid, the urea liquid temperature that records in conjunction with temperature transducer in the urea box, aperture to the electric control system controls heat-operated valve, the urea liquid temperature can be controlled in the setting range, thereby improve the precision that metering is sprayed by the urea-spray system.
Technological scheme of the present invention is achieved in that a kind of mechanical pump formula SCR urea-spray system, form by urea box, urea box switch valve, filter, urea pump, accumulator, urea nozzle, heat exchanger, pressure regulator valve, cooling unit, ECU (Electrical Control Unit), its characteristic is: urea pump is a mechanical pump, and the diesel engine driving wheel drives by the transmission shaft that belt pulley drives urea pump; The urea cooling unit is by cooling unit, heat-operated valve, coolant inlet tube and coolant outlet pipe are formed, the urea cooling unit is arranged between the pressure regulator valve and switch valve of main line, and accumulator places on the pipeline between urea nozzle outlet and the pressure regulator valve; The coolant inlet tube of urea cooling unit links to each other with the high-voltage tube of car air conditioner, and the coolant outlet pipe links to each other with the air-conditioning low-voltage tube, and the flow direction of cooling liquid is opposite with the flow direction of urea liquid.
The aperture of described cooling unit heat-operated valve is controlled by ECU (Electrical Control Unit).
On the described urea box pressure transducer is installed, measures the pressure of urea liquid and feed back to ECU (Electrical Control Unit); Temperature transducer is housed on urea box, measures the temperature of urea liquid and feed back to ECU (Electrical Control Unit); Liquid level sensor also is housed on urea box, measures the liquid level of urea liquid; Heater is housed in the urea box, is used for the temperature of heating urea solution.
Good effect of the present invention is because thereby the mechanical energy-electric energy-mechanical transformation of energy when adopting the mechanical type urea pump to avoid adopting DC electropump in the urea-spray system has reduced energy loss.The flow of urea liquid has been avoided energy dissipation according to the engine speed real-time regulated; Adopt mechanical pump to have also that cost is low, the life-span is long, the advantage of being convenient to keep in repair.
Description of drawings
Fig. 1 is a system schematic of the present invention.Among the figure 1, switch valve, 2, heater, 3, pressure transducer, 4, liquid level sensor, 5, temperature transducer, 6, motor, 7, outlet pipe, 8, driving wheel, 9, belt pulley, 10, urea box, 11, urea liquid, 12, the urea box switch valve, 13, filter, 14, urea pump, 15, heat exchanger, 16, urea nozzle, 17, accumulator, 18, pressure regulator valve, 19, coolant inlet tube, 20, heat-operated valve, 21, coolant outlet pipe, 22, cooling unit, 23, ECU (Electrical Control Unit), 24, the urea cooling unit.
Embodiment
The present invention will be further described below in conjunction with drawings and Examples: as shown in Figure 1, a kind of mechanical pump formula SCR urea-spray system, form by urea box 10, urea box switch valve 12, filter 13, urea pump 14, accumulator 17, urea nozzle 16, heat exchanger 15, pressure regulator valve 18, cooling unit 22, ECU (Electrical Control Unit) 23, its characteristic is: urea pump 14 is mechanical pump, and diesel engine driving wheel 8 drives by the transmission shaft that belt pulley 9 drives urea pump 14; Urea cooling unit 24 is by cooling unit 22, heat-operated valve 20, coolant inlet tube 19 and coolant outlet pipe 21 are formed, urea cooling unit 24 is arranged between the pressure regulator valve 18 and switch valve 1 of main line, and accumulator 17 places on the pipeline between urea nozzle 16 outlet and the pressure regulator valve 18; The coolant inlet tube 19 of urea cooling unit 24 links to each other with the high-voltage tube of car air conditioner, and coolant outlet pipe 21 links to each other with the air-conditioning low-voltage tube, and the flow direction of cooling liquid is opposite with the flow direction of urea liquid 11.
The urea liquid 11 of international standard ISO22241-1 preparation is stored in the urea liquid case 10, urea liquid 11 through urea box switch valve 12 and filter 13 under the effect of urea pump 14, enter the cavity volume of heat exchanger 15, take away the temperature that absorbs from exhaust of urea nozzle 16 by the heat exchange of urea liquid 11 and urea nozzle 16, reduce the temperature of urea nozzle 16.Enter urea nozzle 16 from the heat exchanger 15 rear section urea liquid 11 that comes out, quantitative urea liquid 11 is sprayed in the outlet pipe 7, urea liquid 11 is hydrolyzed to ammonia at a certain temperature, ammonia under catalyst action with the NO in the exhaust
XDischarging is reduced to nitrogen, reaches to reduce NO in the exhaust
XEffect.Most of urea liquid 11 is along the main line pressure regulator valve 18 of flowing through, urea cooling unit 24, get back to urea box 10 behind the switch valve 1, circular energy storage device 17 places on the pipeline between urea nozzle 16 outlet and the pressure regulator valve 18, is used for suppressing the pressure surge in the pipeline.Driving wheel 8 drives urea pump 14 by belt pulley 9 on the motor 6, constitutes the urea drive system.Urea cooling unit 24 is made of coolant inlet tube 19, heat-operated valve 20, coolant outlet pipe 21 and cooling unit 22, is used for the urea liquid 11 of the backflow that temperature behind the cooling heat transferring raises.Coolant inlet tube 19 links to each other with the high-voltage tube of car air conditioner, and coolant outlet pipe 21 links to each other with the air-conditioning low-voltage tube.The flow direction of cooling liquid is opposite with the flow direction of urea liquid 11.Heat-operated valve 5 is by ECU (Electrical Control Unit) 23 control apertures, temperature transducer 5 is used to measure the temperature of urea liquid 11 in the urea box and temperature signal is fed back to control unit 23 in the urea box 10, realizes the urea liquid temperature controlling by the amount of regulating freezing mixture.Pressure transducer 3 is installed on the urea box 10, measures the pressure of urea liquid and feed back to ECU (Electrical Control Unit) 23; Liquid level sensor 4 also is housed on urea box 10, measures the liquid level of urea liquid 11; Temperature transducer 4 is housed on urea box 10, measures the temperature of urea liquid 11 and feed back to ECU (Electrical Control Unit) 23; Be equipped with in the urea box 10 and regulate heater 2, be used for the temperature of heating urea solution 11.
The keying of urea nozzle 16 is sprayed by ECU (Electrical Control Unit) 23 controls.Decide the emitted dose of urea liquid by the opening time of control urea nozzle 16.
Various signals such as the oil temperature that records on signal that pressure transducer 3, temperature transducer 5 record in the native system and the motor 6, water temperature, load, rotating speed are transferred to engine electric-controlled unit 23 together.And then, regulate the switch of heater 2, the aperture of heat-operated valve 20 according to the injecting times and the emitted dose of the control signal control urea nozzle 16 of ECU (Electrical Control Unit) 23 output.The control gear of urea-spray system and controlling method belong to prior art among the present invention, therefore no longer describe in detail in this manual.
Claims (3)
1. mechanical pump formula SCR urea-spray system, form by urea box, urea box switch valve, filter, urea pump, accumulator, urea nozzle, heat exchanger, pressure regulator valve, cooling unit, ECU (Electrical Control Unit), its characteristic is: urea pump is a mechanical pump, and the diesel engine driving wheel drives by the transmission shaft that belt pulley drives urea pump; The urea cooling unit is by cooling unit, heat-operated valve, coolant inlet tube and coolant outlet pipe are formed, the urea cooling unit is arranged between the pressure regulator valve and switch valve of main line, and accumulator places on the pipeline between urea nozzle outlet and the pressure regulator valve; The coolant inlet tube of urea cooling unit links to each other with the high-voltage tube of car air conditioner, and the coolant outlet pipe links to each other with the air-conditioning low-voltage tube, and the flow direction of cooling liquid is opposite with the flow direction of urea liquid.
2. a kind of mechanical pump formula SCR urea-spray according to claim 1 system is characterized in that the aperture of described cooling unit heat-operated valve is controlled by ECU (Electrical Control Unit).
3. a kind of mechanical pump formula SCR urea-spray according to claim 1 system, its feature is equipped with pressure transducer on described urea box, and the pressure of measuring urea liquid also feeds back to ECU (Electrical Control Unit); Temperature transducer is housed on urea box, measures the temperature of urea liquid and feed back to ECU (Electrical Control Unit); Liquid level sensor also is housed on urea box, measures the liquid level of urea liquid; Heater is housed in the urea box, is used for the temperature of heating urea solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105147339A CN101984228A (en) | 2010-10-21 | 2010-10-21 | Mechanical pump type SCR urea spraying system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105147339A CN101984228A (en) | 2010-10-21 | 2010-10-21 | Mechanical pump type SCR urea spraying system |
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| CN101984228A true CN101984228A (en) | 2011-03-09 |
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| CN2010105147339A Pending CN101984228A (en) | 2010-10-21 | 2010-10-21 | Mechanical pump type SCR urea spraying system |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748101A (en) * | 2012-07-10 | 2012-10-24 | 天津亿利汽车环保科技有限公司 | Urea injection system for reducing NOx discharge of engine and control method thereof |
| CN103256106A (en) * | 2012-12-28 | 2013-08-21 | 湖南吉利汽车部件有限公司 | SCR (selective catalytic reduction) injection system without pneumatic assistance |
| CN105626203A (en) * | 2016-01-25 | 2016-06-01 | 三一重机有限公司 | Selective catalytic reduction (SCR) urea heating/cooling system and method |
| CN107420164A (en) * | 2017-04-28 | 2017-12-01 | 东风商用车有限公司 | Urea injection system with external urea nozzle air cooling branch and application method |
| CN109563757A (en) * | 2016-07-29 | 2019-04-02 | 罗伯特·博世有限公司 | The device and method of feedforward control for diesel exhaust gas fluid delivery system |
| CN111535907A (en) * | 2020-05-29 | 2020-08-14 | 凯龙高科技股份有限公司 | Urea solution feeding device and vehicle SCR system |
| CN112761763A (en) * | 2021-01-04 | 2021-05-07 | 潍柴动力股份有限公司 | Control method and control device of urea injection system |
| CN113090371A (en) * | 2021-05-06 | 2021-07-09 | 无锡威孚力达催化净化器有限责任公司 | Portable SCR system urea nozzle testing arrangement and system |
| CN116007277A (en) * | 2023-03-24 | 2023-04-25 | 四川蜀旺新能源股份有限公司 | Adjusting device based on cogeneration system |
Citations (5)
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| DE102004050022A1 (en) * | 2004-10-13 | 2006-04-27 | L'orange Gmbh | Device for cooling a nozzle for injecting a reducing agent into an engine exhaust system comprises a cooling circuit through which the reducing agent is circulated between injections |
| WO2006061943A1 (en) * | 2004-12-07 | 2006-06-15 | Nissan Diesel Motor Co., Ltd. | Exhaust gas purification apparatus |
| DE102007000666A1 (en) * | 2007-01-09 | 2008-07-10 | Denso Corp., Kariya | Reducing agent feeding device for feeding reducing agent in exhaust gas of machine, has tank, which contains reducing agent and pump for sucking and dispensing reducing agent out of tank |
| CN101737127A (en) * | 2008-11-25 | 2010-06-16 | 无锡油泵油嘴研究所 | SCP urea injection system for post treatment of diesel engine emissions |
| CN201835895U (en) * | 2010-10-21 | 2011-05-18 | 中国第一汽车集团公司 | Mechanical pump type SCR (selective catalytic reduction) urea injection system |
-
2010
- 2010-10-21 CN CN2010105147339A patent/CN101984228A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004050022A1 (en) * | 2004-10-13 | 2006-04-27 | L'orange Gmbh | Device for cooling a nozzle for injecting a reducing agent into an engine exhaust system comprises a cooling circuit through which the reducing agent is circulated between injections |
| WO2006061943A1 (en) * | 2004-12-07 | 2006-06-15 | Nissan Diesel Motor Co., Ltd. | Exhaust gas purification apparatus |
| DE102007000666A1 (en) * | 2007-01-09 | 2008-07-10 | Denso Corp., Kariya | Reducing agent feeding device for feeding reducing agent in exhaust gas of machine, has tank, which contains reducing agent and pump for sucking and dispensing reducing agent out of tank |
| CN101737127A (en) * | 2008-11-25 | 2010-06-16 | 无锡油泵油嘴研究所 | SCP urea injection system for post treatment of diesel engine emissions |
| CN201835895U (en) * | 2010-10-21 | 2011-05-18 | 中国第一汽车集团公司 | Mechanical pump type SCR (selective catalytic reduction) urea injection system |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748101A (en) * | 2012-07-10 | 2012-10-24 | 天津亿利汽车环保科技有限公司 | Urea injection system for reducing NOx discharge of engine and control method thereof |
| CN102748101B (en) * | 2012-07-10 | 2014-03-26 | 天津亿利汽车环保科技有限公司 | Urea injection system for reducing NOx discharge of engine and control method thereof |
| CN103256106A (en) * | 2012-12-28 | 2013-08-21 | 湖南吉利汽车部件有限公司 | SCR (selective catalytic reduction) injection system without pneumatic assistance |
| CN103256106B (en) * | 2012-12-28 | 2015-12-23 | 湖南吉利汽车部件有限公司 | Without Aeroassisted SCR ejecting system |
| CN105626203A (en) * | 2016-01-25 | 2016-06-01 | 三一重机有限公司 | Selective catalytic reduction (SCR) urea heating/cooling system and method |
| CN109563757A (en) * | 2016-07-29 | 2019-04-02 | 罗伯特·博世有限公司 | The device and method of feedforward control for diesel exhaust gas fluid delivery system |
| CN109563757B (en) * | 2016-07-29 | 2021-02-26 | 罗伯特·博世有限公司 | Apparatus and method for feed forward control of diesel exhaust fluid delivery system |
| CN107420164A (en) * | 2017-04-28 | 2017-12-01 | 东风商用车有限公司 | Urea injection system with external urea nozzle air cooling branch and application method |
| CN107420164B (en) * | 2017-04-28 | 2023-10-10 | 东风商用车有限公司 | Urea injection system with external urea nozzle air cooling branch and use method |
| CN111535907A (en) * | 2020-05-29 | 2020-08-14 | 凯龙高科技股份有限公司 | Urea solution feeding device and vehicle SCR system |
| CN112761763A (en) * | 2021-01-04 | 2021-05-07 | 潍柴动力股份有限公司 | Control method and control device of urea injection system |
| CN112761763B (en) * | 2021-01-04 | 2022-07-15 | 潍柴动力股份有限公司 | Control method and control device of urea injection system |
| CN113090371A (en) * | 2021-05-06 | 2021-07-09 | 无锡威孚力达催化净化器有限责任公司 | Portable SCR system urea nozzle testing arrangement and system |
| CN116007277A (en) * | 2023-03-24 | 2023-04-25 | 四川蜀旺新能源股份有限公司 | Adjusting device based on cogeneration system |
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Application publication date: 20110309 |