CN207513705U - A kind of EGR integrates emission-reducing device with water vapour - Google Patents
A kind of EGR integrates emission-reducing device with water vapour Download PDFInfo
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- CN207513705U CN207513705U CN201721647745.2U CN201721647745U CN207513705U CN 207513705 U CN207513705 U CN 207513705U CN 201721647745 U CN201721647745 U CN 201721647745U CN 207513705 U CN207513705 U CN 207513705U
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- water
- solenoid valve
- egr
- pipe
- reducing device
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Abstract
The utility model discloses a kind of EGR and water vapour to integrate emission-reducing device, including water tank, water pipe, exhaust pipe, mixer, the first solenoid valve, second solenoid valve, electronic control unit, sensor and air inlet pipe, water tank is connected with water pipe, water pipe, exhaust pipe and mixer connect, the first solenoid valve is provided on water pipe, second solenoid valve is provided on exhaust pipe, sensor connection engine and electronic control unit, electronic control unit are connect with the first solenoid valve and second solenoid valve.The shortcomings that when the utility model overcomes EGR and the air intake duct water-jet technology to be used alone, improve engine and discharged under various load conditions.
Description
Technical field
The utility model is related to Thermal Energy and Power Engineering fields, and in particular to a kind of EGR integrates emission-reducing device with water vapour.
Background technology
Exhaust gas recycles（Exhaust Gas Recirculation, abbreviation ERG）It can effectively be reduced with water-jet technology
Engine NOx（NOX）Discharge.EGR technology has been widely used within the engine.NOXHigh temperature when depending primarily on burning,
Oxygen concentration and high-temperature oxygen-enriched duration.EGR is to enter cylinder after a part of exhaust gas is mixed with fresh air together, is participated in
Subsequent cycle burns to control NOXMethod.Exhaust gas enters cylinder in EGR, makes to enter amount of fresh air reduction, so as to make oxygen dense
Degree reduces；Water vapour H in exhaust gas2O and CO2Specific heat capacity it is larger, heating caloric receptivity is big, reduces temperature during burning, especially most
Combustion temperatures reduce more apparent.EGR reduces oxygen concentration by dilution effect, and maximum combustion temperature is reduced by thermal capacitance effect
To realize NOXDrop row.But EGR reduces oxygen concentration, and high load capacity operating mode can cause burning to deteriorate, make imperfect combustion product hydrocarbon
The increases such as HC and carbon monoxide CO, power drop, fuel consumption rate increase.Water-jet technology mainly has air intake duct water spray, oil emulsion
With three kinds of modes such as directly spray water to combustion chamber.There are greases to be easily delaminated for emulsification oil tech, and storage time is shorter, easily causes combustion
The defects of Electronic fuel injection system reliability decrease.The direct water-jet technology in combustion chamber is difficult to control there are water, hydraulic pressure height causes to spray water
The defects of mouth service life is shorter.Air intake duct water spray relative cost is minimum in three.Water-jet technology is again by thermal capacitance effect and dilution
Effect reduces NOX, and since water is that solid-state known today and specific heat capacity in liquid are highest, water evaporation can also absorb vaporization
Latent heat.Theoretically the effect of water-jet technology reduction NOx should be better than EGR.Air intake duct water spray, can when the amount of water reaches 3 times of fuel oil
To reduce 70%NOX.However water-jet technology influences the starting performance of engine, reduces lubricating oil quality and erosive burning room portion
Part, these shortcomings hinder the popularization and application of water-jet technology.
Individual EGR respectively has shortcoming with air intake duct water-jet technology.In running on the lower load, air intake duct water spray influences to start
The starting performance of machine.During high load capacity, increasing with fuel is sprayed into, coefficient of charge declines, and imperfect combustion product HC and CO increase,
High temperature and duration, which increase, leads to NOXIncrease.EGR exhaust temperature is higher, to prevent reduction air inflow from need to be cooled down.It reduces
Coefficient of charge need to further use cooler, while in addition EGR reduces NOx by reducing oxygen concentration and reducing ignition temperature,
Burning quality is degrading, increases imperfect combustion product, reduces dynamic property and economy.During close to full load, start to make
Machine keeps enough power performance, does not allow to use EGR.
Invention content
To solve the above-mentioned problems, the utility model provides a kind of EGR and integrates emission-reducing device with water vapour.
The technical solution of the utility model is：A kind of EGR integrates emission-reducing device with water vapour, including water tank, water pipe, exhaust
Pipe, mixer, the first solenoid valve, second solenoid valve, electronic control unit, sensor and air inlet pipe, water tank are connected with water pipe, water
Pipe, exhaust pipe and mixer connect, and are provided with the first solenoid valve on water pipe, second solenoid valve, sensor are provided on exhaust pipe
Connection engine and electronic control unit, electronic control unit are connect with the first solenoid valve and second solenoid valve.
Further, the sensor is mass-air-flow sensor, engine exhaust temperature sensor and speed probe.
Further, first solenoid valve is arranged on water pipe and mixer junction.
Further, the second solenoid valve is arranged on exhaust pipe and mixer junction.
Further, the mixer is connect with air inlet pipe.
The beneficial effects of the utility model are：Mixer is connect by the utility model with water tank, exhaust pipe, ECU, is used
The work information of engine is passed to ECU by EGR and water vapour integrating device, sensor, and it is suitable that ECU is controlled by solenoid valve
Water spray and EGR rate, the shortcomings that overcoming EGR and air intake duct water-jet technology respectively, improve dual fuel engine in various loads
It is discharged under operating mode, significantly reduce NOx and controls CH and CO, which can also be used for the drop of low-sulfur diesel-oil engine gas pollutant
Row.
Description of the drawings
The utility model is described in further detail with reference to the accompanying drawings and examples.
Fig. 1 is the structure diagram of the utility model.
Specific embodiment
Specific embodiment of the present utility model is described further below in conjunction with the accompanying drawings, the present embodiment is not formed to this
The limitation of utility model.
A kind of EGR integrates emission-reducing device with water vapour, including water tank 1, water pipe 2, the first solenoid valve 3, mixer 4, exhaust
Pipe 5, second solenoid valve 6, electronic control unit 7, air inlet pipe 8, engine exhaust temperature sensor 9, speed probe 10, inlet air flow
Quantity sensor 11 and engine 12.
As shown in Figure 1, water tank 1 is connect with water pipe 2, water pipe 2 is connect with mixer 4, and water pipe 2 is set with 4 junction of mixer
The first solenoid valve 3 is equipped with, for regulating water flow.Exhaust pipe 5 is provided with second solenoid valve 6 with 4 junction of mixer, for adjusting
Save EGR rate.Mixer 4 is connect with air inlet pipe 8.
Engine exhaust temperature sensor 9, speed probe 10, intake flow sensor 11 connect engine 12 and electronics control
Unit 7 processed.Electronic control unit 7 is connect with the first solenoid valve 3, second solenoid valve 6, and electronic control unit 7 passes through the first electromagnetism
Valve 5 controls water spray, and electronic control unit 7 controls EGR rate by second solenoid valve 6, and electronic control unit 7 can be in different operating modes
Under, determine suitable water spray and EGR rate.
Electronic control unit 7 starts according to what exhaust temperature sensor 9, speed probe 10, intake flow sensor 11 transmitted
Machine work information controls the first solenoid valve and second solenoid valve, realizes that water vapour and EGR joints reduce discharge.
EGR and water vapour integrating device can reduce double fuel under various loads（Liquefied natural gas and diesel oil）Engine
Discharge.Running on the lower load when rotating speed is less than rated engine speed 70% and arranges temperature less than declared working condition 80%, does not spray water, uses 15~25%
EGR rate.With the increase of load, EGR rate constantly declines, and water spray gradually increases.When rotating speed is more than 90% and arranges temperature more than calibration
During operating mode 85%, only spray water, 2~3 times of gas quantities of water spray.
In the utility model, ECU is according to engine exhaust temperature sensor 9, speed probe 10, intake flow sensor 11
It determines the operating mode of engine, in underload, does not spray water, using larger EGR rate；With the increase of load, EGR rate gradually subtracts
Few, water spray gradually increases；During high load capacity, only spray water.During underload, cylinder temperature is low, passes through exhaust gas heating fresh air, contracting
Short delay period reduces combustion peak temperature, accelerates burning velocity, shortens high-temperature duration, not only reduces NOx, but also reduce endless
Full combustion product hydrocarbon HC and carbon monoxide CO.During moderate duty, EGR exhaust main ingredient is N2、CO2And H 2O, after water spray,
Water vapour will replace part N into air inlet pipe2And CO2.Water vapour resolves into H, O and OH isoreactivity at high temperature under high pressure
Substance, H burn rates are much larger than CH fuel, accelerated combustion process；O and OH can aoxidize imperfect combustion product HC and CO.Water steams
Vapour can overcome the disadvantages that N in EGR2And CO2Burning quality is caused to decline, the defects of HC and CO amounts increase, avoid economy and dynamic property
Decline.Water vapor absorbs heat, reduces the temperature of exhaust gas, does not need to cooler for recycled exhaust gas, saves cost.
The above descriptions are merely preferred embodiments of the present invention, is not used in limitation the utility model, this field skill
Art personnel can make various modifications or equivalent replacements in the essence and protection domain of the utility model to the utility model,
This modification or equivalent replacement also should be regarded as falling in the protection domain of technical solutions of the utility model.
Claims (5)
1. a kind of EGR integrates emission-reducing device with water vapour, it is characterised in that：Including water tank, water pipe, exhaust pipe, mixer, first
Solenoid valve, second solenoid valve, electronic control unit, sensor and air inlet pipe, water tank are connected with water pipe, and water pipe, exhaust pipe are with mixing
Clutch connects, and the first solenoid valve is provided on water pipe, and second solenoid valve, sensor connection engine and electricity are provided on exhaust pipe
Sub-control unit, electronic control unit are connect with the first solenoid valve and second solenoid valve.
2. a kind of EGR according to claim 1 integrates emission-reducing device with water vapour, it is characterised in that：The sensor is
Mass-air-flow sensor, engine exhaust temperature sensor and speed probe.
3. a kind of EGR according to claim 1 integrates emission-reducing device with water vapour, it is characterised in that：First electromagnetism
Valve is arranged on water pipe and mixer junction.
4. a kind of EGR according to claim 1 integrates emission-reducing device with water vapour, it is characterised in that：Second electromagnetism
Valve is arranged on exhaust pipe and mixer junction.
5. a kind of EGR according to claim 1 integrates emission-reducing device with water vapour, it is characterised in that：The mixer with
Air inlet pipe connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721647745.2U CN207513705U (en) | 2017-12-01 | 2017-12-01 | A kind of EGR integrates emission-reducing device with water vapour |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721647745.2U CN207513705U (en) | 2017-12-01 | 2017-12-01 | A kind of EGR integrates emission-reducing device with water vapour |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207513705U true CN207513705U (en) | 2018-06-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721647745.2U Expired - Fee Related CN207513705U (en) | 2017-12-01 | 2017-12-01 | A kind of EGR integrates emission-reducing device with water vapour |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109356750A (en) * | 2018-11-10 | 2019-02-19 | 天津大学 | A method of the fuel cell coupling engine water spray for passenger car |
-
2017
- 2017-12-01 CN CN201721647745.2U patent/CN207513705U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109356750A (en) * | 2018-11-10 | 2019-02-19 | 天津大学 | A method of the fuel cell coupling engine water spray for passenger car |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180619 Termination date: 20191201 |