CN206129442U - EGR cooling system for gas engine - Google Patents
EGR cooling system for gas engine Download PDFInfo
- Publication number
- CN206129442U CN206129442U CN201621224254.2U CN201621224254U CN206129442U CN 206129442 U CN206129442 U CN 206129442U CN 201621224254 U CN201621224254 U CN 201621224254U CN 206129442 U CN206129442 U CN 206129442U
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- egr
- gas
- engine
- temperature sensor
- exhaust gas
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Abstract
The utility model discloses a EGR cooling system for gas engine, including the EGR cooler, be equipped with coolant liquid import and cooling liquid exit on the EGR cooler, the one end of EGR cooler is connected with the EGR intake pipe, and the other end is connected with the EGR outlet duct, the EGR outlet duct still is connected with the EGR blender, be equipped with temperature sensor on the EGR outlet duct, be equipped with the proportional valve in the coolant liquid import, temperature sensor the proportional valve is connected with the ECU electricity of engine respectively. The temperature of waste gas in the temperature sensor real -time detection EGR outlet duct to feed back to engine ECU with the temperature value, engine ECU is according to the size of temperature value, the aperture of controlling ratio valve, thus control flows into the flow of the coolant liquid of EGR cooler, makes the gas mixture can not produce the comdenstion water, can not influence the combustion processes of gas, can not reduce gas engine's dynamic property and economic nature.
Description
Technical field
The utility model is related to EGR technology field, is a kind of gas engine cooling system for recycled exhaust gas specifically.
Background technology
It is also more and more stricter to the emission request of vehicle with country and raising of the government to environmental requirement.Due to installing additional
EGR (waste gas recycling) device can effectively reduce the emission level of engine, therefore, install the natural gas engine of EGR device additional
Machine is more and more.
Natural gas main component is CH4, has vapor in its combustion product, for natural gas engine, in waste gas
Water vapour content accounts for 10% or so of waste gas total content.Due to, without particle and soot, not existing in the waste gas of natural gas engine
The attachment issue of particle, soot on cooler, therefore waste gas, Jing after cooler for recycled exhaust gas cooling, it is very low that the temperature of waste gas can drop,
Possibly lower than the condensation point of water, waste gas is mixed to form gaseous mixture, the temperature of gaseous mixture in EGR mixer with air, natural gas
Degree is likely lower than the dew point of water, so that the hydrogenesis in gaseous mixture are aqueous water.Aqueous water enters natural gas engine gas
After cylinder, the combustion process of natural gas can be affected, reduce the dynamic property and economy of natural gas engine.
The content of the invention
Technical problem to be solved in the utility model is：A kind of gas engine cooling system for recycled exhaust gas is provided, in real time inspection
Survey and adjust the air outlet temperature of cooler for recycled exhaust gas, it is to avoid the hydrogenesis in gaseous mixture are aqueous water, improve the dynamic property of engine
And economy.
To solve above-mentioned technical problem, the technical scheme of utility model is：
Gas engine cooling system for recycled exhaust gas, including：Cooler for recycled exhaust gas, the cooler for recycled exhaust gas is provided with cooling liquid inlet
And cooling liquid outlet, one end of the cooler for recycled exhaust gas is connected with EGR air inlet pipe, and the other end is connected with EGR escaping pipes, the EGR
Escaping pipe is also associated with EGR mixer, and the EGR escaping pipes are provided with temperature sensor, and the cooling liquid inlet is provided with ratio
Example valve, the temperature sensor, the proportioning valve are electrically connected respectively with the ECU of engine.
Preferably, the temperature sensor is located at the EGR escaping pipes near one end of the EGR mixer.
Preferably, the proportioning valve is electric butterfly valve.
As a result of above-mentioned technical proposal, the beneficial effects of the utility model are：
Because EGR air inlet pipe, cooler for recycled exhaust gas, EGR escaping pipes and EGR mixer are sequentially communicated, EGR escaping pipes are provided with
Temperature sensor, temperature sensor is electrically connected with Engine ECU, and Engine ECU is electrically connected with proportioning valve, and proportioning valve is arranged at cold
But in liquid import；Temperature sensor can in real-time detection EGR escaping pipe waste gas temperature, and temperature value is fed back to into engine
ECU, Engine ECU controls the aperture of proportioning valve according to the size of temperature value, so as to control to flow into the coolant of cooler for recycled exhaust gas
Flow, with avoid because coolant rate is excessive cause from EGR escaping pipes flow out EGT less than water condensation point, so as to
So that into cylinder mixture temperature higher than water dew point, condensed water will not be produced, do not affect the burned of combustion gas
Journey, improves the dynamic property and economy of gas engine.Gas engine of the present utility model passes through closed loop with cooling system for recycled exhaust gas
The air outlet temperature of control and regulation cooler for recycled exhaust gas, simple structure, precise control.
Description of the drawings
Fig. 1 is the structural representation of the utility model gas engine cooling system for recycled exhaust gas；
Fig. 2 is the control principle drawing of the utility model gas engine cooling system for recycled exhaust gas；
In figure：1-EGR coolers；11- cooling liquid inlets；12- cooling liquid outlets；2-EGR air inlet pipe；3-EGR escaping pipes；
4-EGR blenders；5- temperature sensors；6- Engine ECUs；7- proportioning valves.
Specific embodiment
In order that the purpose of this utility model, technical scheme and advantage become more apparent, below in conjunction with accompanying drawing and enforcement
Example, is further elaborated to the utility model.It should be appreciated that specific embodiment described herein is only to explain
The utility model, and it is not used in restriction the utility model.
As Fig. 1 and Fig. 2 jointly shown in, a kind of gas engine cooling system for recycled exhaust gas, including cooler for recycled exhaust gas 1, EGR coolings
Device 1 is provided with cooling liquid inlet 11 and cooling liquid outlet 12, and one end of cooler for recycled exhaust gas 1 is provided with EGR air inlet pipe 2, and the other end is provided with
EGR escaping pipes 3, EGR escaping pipes 3 are also associated with EGR mixer 4, and EGR escaping pipes 3 are provided with temperature sensor 5, and coolant is entered
Mouth 11 is provided with proportioning valve 7, and temperature sensor 5 and proportioning valve 7 are electrically connected with Engine ECU 6.
When actually used, EGR air inlet pipe 2 is communicated with the blast pipe of natural gas engine, EGR escaping pipes 3 and natural gas
The cylinder of engine is communicated, the temperature of the waste gas that the real-time detection of temperature sensor 5 flows out from EGR escaping pipes 3, and giving up detection
Temperature value feeds back to Engine ECU 6, Engine ECU 6 to the temperature value of waste gas compared with the temperature value of setting, according to than
Compared with output control proportioning valve 7 aperture so that the EGT flowed out from EGR escaping pipes 3 is in the suitable scope, so as to
Avoid the temperature of gaseous mixture less than the dew point of water, do not have aqueous water into the cylinder of natural gas engine, do not interfere with natural
The burning of gas, does not interfere with the dynamic property and economy of natural gas engine.
As shown in figure 1, temperature sensor 5 is located at EGR escaping pipes 3 near one end of EGR mixer 4, to improve waste gas temperature
The accuracy rate of degree detection.
Proportioning valve 7 preferentially selects electric butterfly valve.
Above-described embodiment is used to explain the utility model, and shall not be construed as to restriction of the present utility model.All bases
In the made many variations of design of the present utility model, fall within protection domain of the present utility model.
Claims (3)
1. gas engine cooling system for recycled exhaust gas, including cooler for recycled exhaust gas, the cooler for recycled exhaust gas is provided with cooling liquid inlet and cold
But liquid outlet, one end of the cooler for recycled exhaust gas is connected with EGR air inlet pipe, and the other end is connected with EGR escaping pipes, the EGR outlets
Pipe is also associated with EGR mixer, it is characterised in that the EGR escaping pipes are provided with temperature sensor, on the cooling liquid inlet
Proportioning valve is provided with, the temperature sensor, the proportioning valve are electrically connected respectively with the ECU of engine.
2. gas engine cooling system for recycled exhaust gas as claimed in claim 1, it is characterised in that the temperature sensor is located at
The EGR escaping pipes are near one end of the EGR mixer.
3. gas engine cooling system for recycled exhaust gas as claimed in claim 1 or 2, it is characterised in that the proportioning valve is electronic
Butterfly valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621224254.2U CN206129442U (en) | 2016-11-14 | 2016-11-14 | EGR cooling system for gas engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621224254.2U CN206129442U (en) | 2016-11-14 | 2016-11-14 | EGR cooling system for gas engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206129442U true CN206129442U (en) | 2017-04-26 |
Family
ID=58562996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621224254.2U Active CN206129442U (en) | 2016-11-14 | 2016-11-14 | EGR cooling system for gas engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206129442U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111622867A (en) * | 2020-06-05 | 2020-09-04 | 安徽江淮汽车集团股份有限公司 | Exhaust gas recirculation system, method and vehicle |
| CN112682225A (en) * | 2020-12-25 | 2021-04-20 | 潍柴动力股份有限公司 | Control method and control device of EGR (exhaust gas Recirculation) system |
-
2016
- 2016-11-14 CN CN201621224254.2U patent/CN206129442U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111622867A (en) * | 2020-06-05 | 2020-09-04 | 安徽江淮汽车集团股份有限公司 | Exhaust gas recirculation system, method and vehicle |
| CN112682225A (en) * | 2020-12-25 | 2021-04-20 | 潍柴动力股份有限公司 | Control method and control device of EGR (exhaust gas Recirculation) system |
| CN112682225B (en) * | 2020-12-25 | 2022-09-06 | 潍柴动力股份有限公司 | Control method and control device of EGR (exhaust gas Recirculation) system |
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