CN203750434U - Gas mixing system for internal combustion engine air distribution system - Google Patents
Gas mixing system for internal combustion engine air distribution system Download PDFInfo
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- CN203750434U CN203750434U CN201420142813.XU CN201420142813U CN203750434U CN 203750434 U CN203750434 U CN 203750434U CN 201420142813 U CN201420142813 U CN 201420142813U CN 203750434 U CN203750434 U CN 203750434U
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- oxygen
- combustion engine
- internal combustion
- air
- carbon dioxide
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Abstract
The utility model discloses a gas mixing system for an internal combustion engine air distribution system. The gas mixing system comprises a dynamic mixer, a flow control valve, a carbon dioxide or air flow meter, and an oxygen flow control mechanism, wherein the dynamic mixer is respectively connected with oxygen and carbon dioxide or air input; the output end is connected with an internal combustion engine; the flow control valve is connected to a pipeline, being used for introducing oxygen, of the dynamic mixer; the carbon dioxide or air flow meter is connected to the pipeline, being used for introducing carbon dioxide or air, of the dynamic mixer; the input end of the oxygen flow control mechanism is connected to the carbon dioxide or air flow meter, the required oxygen flow is obtained according to the carbon dioxide or air flow or preset oxygen value, a control signal is output to the flow control valve by the oxygen flow control mechanism, and the output end of the oxygen flow control mechanism is connected to the flow control valve through a circuit. The oxygen flow is controlled by flow computation, online quick adjustment of oxygen concentration is achieved, a test does not need to be terminated, implementation of the test is facilitated, the labor intensity is reduced, the concentration of oxygen in the mixed gas is effectively controlled, utilization after preparation can be achieved, and the requirements of huge gas consumption of the internal combustion engine are met.
Description
Technical field
The utility model relates to a kind of gas hybrid technology of power engineering, is specifically related to a kind of Valve System of Internal Combustion Engine test gas mixing system.
Background technology
The whole nation is absorbed in serious haze and pollutes weather, cause the reason in haze sky to comprise industrial gas emission, motor vehicle exhaust emission and dust from construction sites, and the tail gas of motor vehicle is the topmost composition of haze particle composition, sulfur dioxide, nitrogen oxide and pellet are the chief components of haze.In the pollution of the atmospheric environment that fuel combustion causes, endangering maximum and the most unmanageable is exactly nitrogen oxide (NO
x).
At present, combustion motor (comprising diesel engine and gasoline engine) discharged nitrous oxides method research is both at home and abroad a lot, organic interior method of purification (burning optimization, the injection of high-pressure common rail fuel oil, high pressure-charging, adjustable valve timing), pretreatment technology (EGR EGR, fuel water etc.) and post-processing technology (SCR SCR).Reduce the research of discharged nitrous oxides, become global focus.The discharge of internal combustion engine nitrogen oxide is mainly from airborne nitrogen, and high temperature shift becomes nitrogen oxide.Reduce the nitrogen content in air-intake of combustion engine by research, reduce internal combustion engine NO and reach
xdischarge.
In order to meet the working condition requirement of internal combustion engine, the impact of the change combustion motor discharged nitrous oxides of research air inlet composition.Need configuration gaseous mixture, air, CO
2/ air, the heterogeneity gases such as high-concentration oxygen mix, and reach few nitrogen in air inlet composition, or even without nitrogen, feed internal combustion engine and burn, thus analysis and research engine conditions and emission behaviour.Current, the air mixer on market, mostly is static mixer, and internal combustion engine air consumption is large, can not meet its consumption gas requirement.In order to find best gas mixture ratio by test, the dynamic mixing match device of minority, can not be according to testing the setting value that need to adjust at any time oxygen content.In order to meet test requirements document, need configuration oxygen concentration to set, flowrate proportioning control command stream adjustable valve, oxygen flow feedback regulation, the fine setting of oxygen concentration on-line monitoring proportion expression feedback waits device.
Utility model content
The utility model provides a kind of Valve System of Internal Combustion Engine gas mixing system, by gas hybrid technology, by air and CO
2/ air gas mixes, and supplies with diesel combustion, reduces the discharge of diesel engine nitrogen oxide; Control oxygen concentration in mist, when ensureing that diesel engine runs well, find best proportioning, improve burning, reduce the discharge of carbon granule.
For achieving the above object, the utility model provides a kind of Valve System of Internal Combustion Engine gas mixing system, is characterized in, this gas mixing system comprises:
Dynamic mixer, its input connects respectively oxygen and carbon dioxide or air input; Output connects internal combustion engine;
Flow control valve, it is connected on the pipeline of described dynamic mixer access oxygen;
Carbon dioxide or mass air flow sensor, it is connected on the pipeline of described dynamic mixer access carbon dioxide or air;
Oxygen flux control mechanism, its inlet circuit connects carbon dioxide or mass air flow sensor, and circuit of output terminal connection traffic control valve receives carbon dioxide or air flow rate signal, and export ratio integral differential controls signal to flow control valve.
Between above-mentioned dynamic mixer and flow control valve, gas circuit is connected with oxygen flow meter, and oxygen flow meter circuit of output terminal is connected to oxygen flux control mechanism.
Above-mentioned dynamic mixer output is provided with sampler, and sampler output connects oxygen analyser, and oxygen analyser output connects oxygen flux control mechanism.
Between above-mentioned dynamic mixer and internal combustion engine, be provided with static mixing stable-pressure device.
The pipeline of above-mentioned gas hybrid system access internal combustion engine is provided with automatic constant pressure valve.
After oxygen mixes with carbon dioxide or air, export and static mixing buffering by automatic constant-pressure, be delivered to internal combustion engine; Set value and calculate requisite oxygen throughput control signal by flow proportional and be delivered to flow control valve according to surveying the carbon dioxide of gained or air mass flow and default oxygen, by adjust flux control valve opening control oxygen flow; After Flow-rate adjustment valve regulation oxygen flow, survey and regulate rear oxygen flow by oxygen flow meter, draw and regulate the difference of rear oxygen flow and requisite oxygen throughput to feed back to flow control valve, quick adjustment oxygen flow; Sampling after oxygen mixes with carbon dioxide or air, analyzes by oxygen analyser oxygen mixes oxygen in rear mist content with carbon dioxide or air, and sets value relatively with oxygen, feeds back to flow control valve fine setting oxygen flow; The mixed mist of oxygen and carbon dioxide or air enters before internal combustion engine, gathers the air pressure of mist and default pressure design value comparison, stablizes the pressure of air-intake of combustion engine mouth by automatic pressure stabilizing valve; The mixed mist of oxygen and carbon dioxide or air enters before internal combustion engine, adopts the voltage stabilizing of static mixing stable-pressure device.
The IC engine gas distribution technology of the utility model Valve System of Internal Combustion Engine gas mixing system and prior art is compared, its advantage is, the utility model, according to different oxygen setting values, by flow rate calculation, is realized and is controlled fast oxygen flow valve opening control oxygen flow; The monitoring of oxygen flow channel capacity, rapid feedback regulates the aperture of oxygen flow rate adjusting valve door; , compare with oxygen concentration setting value oxygen concentration on-line analysis feedback in mist by oxygen analyser, fine setting oxygen flow rate adjusting valve door aperture, controls oxygen concentration precision in mist.In engine test process, can realize the rapid adjustment of online oxygen concentration, do not need termination test, be conducive to the carrying out of test, reduce labour intensity, effectively control the concentration of oxygen in mist, can realize with using with joining, meet the air consumption demand that internal combustion engine is huge.
Brief description of the drawings
Fig. 1 is the schematic diagram of the utility model Valve System of Internal Combustion Engine gas mixing system;
Fig. 2 is the monitoring interface schematic diagram of dynamic mixer.
Detailed description of the invention
Below in conjunction with accompanying drawing, further illustrate specific embodiment of the utility model.
As shown in Figure 1, the utility model discloses a kind of Valve System of Internal Combustion Engine gas mixing system, this gas mixing system includes the dynamic mixer mixing for interior combustion gas distribution, and this dynamic mixer input accesses the oxygen that need mix and carbon dioxide or air by pipeline respectively and (calls in the following text: CO
2/ air); The output of dynamic mixer is connected to the air inlet of internal combustion engine by pipeline.In the present embodiment, oxygen input adopts the high-concentration oxygen without nitrogen.
On the pipeline of dynamic mixer access oxygen, be provided with flow control valve, this flow control valve, by oxygen flux control mechanism controls, by controlling the aperture of flow control valve, regulates the oxygen flow of input in real time.
At dynamic mixer access CO
2the pipeline of/air is provided with CO
2/ mass air flow sensor, this CO
2the circuit of output terminal of/mass air flow sensor is connected to oxygen flux control mechanism.CO
2the CO of/mass air flow sensor Real-Time Monitoring input dynamic mixer
2/ air gas flow, and by CO
2/ air gas flow signal exports oxygen flux control mechanism to, and oxygen flux control mechanism is according to the CO receiving
2/ air flow rate signal value, and combine with default oxygen content setting value, pass through flow rate calculation, draw requisite oxygen air flow value, convert requisite oxygen air flow value to PID(PID) output signal value, and PID signal value is transferred to flow control valve, control the aperture of flow control valve, thereby make to regulate the flow of rear oxygen meet or approach requisite oxygen air flow value, this is commander's adjusting.
Above-mentioned flow rate calculation is that requisite oxygen air flow value is calculated in through type (1) or (2):
Air and oxygen mix:
(1)
Oxygen and CO
2mix:
(2)
In above formula: C is oxygen content setting value; Q
oxygenfor oxygen consuming gas amount; Q
cO2for CO2 consumption; Q
airfor air air consumption.
At dynamic mixer access CO
2on the pipeline of/air, be also provided with automatic constant pressure valve, ensure CO
2the air pressure of/air input is constant.
On the pipeline between flow control valve and dynamic mixer, be provided with oxygen flow meter, its circuit of output terminal is connected to oxygen flux control mechanism, oxygen flow meter for Real-Time Monitoring by the adjusting of Flow-rate adjustment valve regulation after oxygen flow information export oxygen flux control mechanism to, oxygen flux control mechanism compares oxygen flow after the adjusting of reception and requisite oxygen air flow value, and rapid feedback is to flow control valve, realize quick adjustment oxygen flow, shorten the required time of mist oxygen content that changes oxygen and nitrogen dioxide, this is feedback regulation.
Dynamic mixer output is provided with sampler, and this device output is connected with oxygen analyser, and oxygen analyser output is connected to oxygen flux control mechanism.Sampler is used for sampling through dynamic mixer mist after treatment, and is delivered to oxygen analyser, and oxygen analyser is analyzed the content of oxygen in mist, for user record.Simultaneously in mist, the content of oxygen is delivered to oxygen flux control mechanism, and the content of oxygen in this mist is set value and compared with default oxygen, feeds back to flow control valve, and oxygen flow is finely tuned.
In the conveying of whole oxygen and the transfer pipeline of mist, be all provided with oxygen content analytical equipment, in real time the oxygen content in each stage gas is monitored and record, be convenient to the contrast of result of the test, and can carry out respective operations according to oxygen content at any time, adjust required oxygen concentration.
Between dynamic mixer and internal combustion engine, be provided with static mixing stable-pressure device, by static mixing stable-pressure device, the mist of dynamic mixer output carried out to voltage stabilizing, ensure the uniformity of mist.
The pipeline of gas mixing system access internal combustion engine is provided with mechanical type automatic constant pressure valve, by manual setting mechanical type automatic constant pressure valve output pressure value size, gas after constant pressure valve is caused to constant pressure valve, in the time that gas pressure after valve is less than setting value, automatic constant pressure valve valve opening increases, and reduces pressure drop; When downstream pressure is higher than when setting value, automatic constant pressure valve valve opening reduces, and increases pressure drop; Thereby adjust in real time air pressure, ensure to enter mist air pressure constant of internal combustion engine.
Preferably, oxygen flux control mechanism can be arranged in dynamic mixer, as shown in Figure 2, for monitoring the schematic diagram of panel on dynamic mixer in this kind of embodiment, connect blender monitoring lcd panel, after communication state indicator lamp is bright, first the value that input needs in oxygen content is set input frame, click again mixture start button, automatically adjust (ratio calculating commander control, the coarse adjustment of flow feedback and the fine setting of oxygen concentration analysis feedback) the Flow-rate adjustment PID output valve of oxygen, adjust flux control valve opening, and two traffic consumes values (oxygen flow in panel, CO
2/ air mass flow) there is a demonstration.If last in the figure output of oxygen content monitoring in real time, the content concn of oxygen deviation to some extent, needs press the content trim button in lower panel, then by the PID numerical values recited of upper and lower manual adjustments oxygen flow rate adjusting valve, thereby the aperture of control flow control valve.
According to internal combustion engine air consumption, follow-up flow blender CO for this test
2/ air pipe line diameter is DN65, and oxygen pipeline diameter is DN50, and flowmeter range is 0 ~ 200 cubic meter/hour, and user can be as required, adjusts pipeline diameter size and selects suitable flowmeter.In liquid crystal control panel, PID output number range is 0 ~ 30000,0 to represent that flow control valve is in closed condition, and 30000 represent that flow control valves are in full-gear, PID numerical values recited and the flow control valve aperture proportionate relationship that is in line.
As shown in Figure 1, it is as follows that the utility model also discloses a kind of gas mixture length of Valve System of Internal Combustion Engine gas mixing system:
Oxygen and CO
2/ air is delivered to internal combustion engine after mixing by dynamic mixer.Oxygen pipeline and CO before dynamic mixer
2/ air pipe line merges, because oxygen pipeline pressure will be higher than CO
2/ air pipe line pressure, enters CO in pressure mode
2in/air gas, then mix (as the repeatedly static patterning method of existing market etc.) through dynamic mixer, complete oxygen and CO
2the mist of/air.
Carrying out in the process of gas mixing, CO
2the CO of/mass air flow sensor real-time detection input
2/ air mass flow, according to CO
2/ air stream value and default oxygen setting value are carried out flow proportional calculating, obtain requisite oxygen throughput, and convert thereof into pid value, and output pid control signal is to flow control valve.By adjust flux control valve opening, realize and control oxygen flow.
After Flow-rate adjustment valve regulation oxygen flow, oxygen flow after also regulating by oxygen flow meter real-time detection, by Oxygen Flow value after the adjusting of gained and requisite oxygen throughput relatively and draw and difference feed back to rapidly flow control valve, to realize quick adjustment oxygen flow.
At oxygen and CO
2/ air, after dynamic mixer mixes, is sampled mist by sampler, analyzes oxygen and CO by oxygen analyser
2the content of oxygen in mist after/air mixes, for user record, and the oxygen content value in this mist and default oxygen setting value are compared, draw its difference and feed back to flow control valve, to realize the fine setting to oxygen flow, thus the concentration of oxygen in more stable control mist.
In order to facilitate the comparison of result of the test, need to ensure that the admission pressure of internal combustion engine is consistent with normal operating conditions, oxygen and CO
2the mixed mist of/air is about to enter before internal combustion engine, stablizes the gas pressure of air-intake of combustion engine mouth input by automatic pressure stabilizing valve.
At oxygen and CO
2the mixed mist of/air enters before internal combustion engine, adopt static mixing stable-pressure device to carry out voltage stabilizing to mist, on the one hand gaseous mixture is carried out to further static mixing, when alleviating on the other hand engine conditions and changing, air consumption changes the impact to blender.
In the process of mixing at whole gas, the information of oxygen content or high-concentration oxygen input value in gas mixer Real-Time Monitoring mist, for user's real time record, this oxygen content information can derive by USB interface, as test reference frame.
Although content of the present utility model has been done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to restriction of the present utility model.Read after foregoing those skilled in the art, for multiple amendment of the present utility model and substitute will be all apparent.Therefore, protection domain of the present utility model should be limited to the appended claims.
Claims (6)
1. a Valve System of Internal Combustion Engine gas mixing system, is characterized in that, this gas mixing system comprises:
Dynamic mixer, its input connects respectively oxygen and carbon dioxide or air input; Output connects internal combustion engine;
Flow control valve, it is connected on the pipeline of described dynamic mixer access oxygen;
Carbon dioxide or mass air flow sensor, it is connected on the pipeline of described dynamic mixer access carbon dioxide or air;
Oxygen flux control mechanism, its inlet circuit connects carbon dioxide or mass air flow sensor, and circuit of output terminal connection traffic control valve receives carbon dioxide or air flow rate signal, and export ratio integral differential controls signal to flow control valve.
2. Valve System of Internal Combustion Engine gas mixing system as claimed in claim 1, is characterized in that, between described dynamic mixer and flow control valve, gas circuit is connected with oxygen flow meter, and oxygen flow meter circuit of output terminal is connected to oxygen flux control mechanism.
3. Valve System of Internal Combustion Engine gas mixing system as claimed in claim 1, is characterized in that, described dynamic mixer output is provided with sampler, and sampler output connects oxygen analyser, and oxygen analyser output connects oxygen flux control mechanism.
4. Valve System of Internal Combustion Engine gas mixing system as claimed in claim 1, is characterized in that, is provided with static mixing stable-pressure device between described dynamic mixer and internal combustion engine.
5. Valve System of Internal Combustion Engine gas mixing system as claimed in claim 1, is characterized in that, the pipeline of described gas mixing system access internal combustion engine is provided with automatic constant pressure valve.
6. Valve System of Internal Combustion Engine gas mixing system as claimed in claim 1, is characterized in that, on the pipeline of access carbon dioxide or air, is also provided with automatic constant pressure valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420142813.XU CN203750434U (en) | 2014-03-27 | 2014-03-27 | Gas mixing system for internal combustion engine air distribution system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420142813.XU CN203750434U (en) | 2014-03-27 | 2014-03-27 | Gas mixing system for internal combustion engine air distribution system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203750434U true CN203750434U (en) | 2014-08-06 |
Family
ID=51245744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420142813.XU Expired - Fee Related CN203750434U (en) | 2014-03-27 | 2014-03-27 | Gas mixing system for internal combustion engine air distribution system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203750434U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103861489A (en) * | 2014-03-27 | 2014-06-18 | 上海海事大学 | Gas mixing system and method applicable to gas distribution system of internal combustion engine |
| CN111318192A (en) * | 2020-03-23 | 2020-06-23 | 潍坊众成自动化设备有限公司 | System and method for automatically proportioning various fuel gases and air according to flow requirements |
| CN113654359A (en) * | 2021-07-27 | 2021-11-16 | 中冶长天国际工程有限责任公司 | Oxygen supply system for gas combustion and adjusting method |
-
2014
- 2014-03-27 CN CN201420142813.XU patent/CN203750434U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103861489A (en) * | 2014-03-27 | 2014-06-18 | 上海海事大学 | Gas mixing system and method applicable to gas distribution system of internal combustion engine |
| CN103861489B (en) * | 2014-03-27 | 2016-01-20 | 上海海事大学 | Valve System of Internal Combustion Engine gas mixing system and gas and vapor permeation method |
| CN111318192A (en) * | 2020-03-23 | 2020-06-23 | 潍坊众成自动化设备有限公司 | System and method for automatically proportioning various fuel gases and air according to flow requirements |
| CN113654359A (en) * | 2021-07-27 | 2021-11-16 | 中冶长天国际工程有限责任公司 | Oxygen supply system for gas combustion and adjusting method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140806 Termination date: 20150327 |
|
| EXPY | Termination of patent right or utility model |