CN103439101A - Intake manifold performance detection device and detection method - Google Patents
Intake manifold performance detection device and detection method Download PDFInfo
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- CN103439101A CN103439101A CN201310383723XA CN201310383723A CN103439101A CN 103439101 A CN103439101 A CN 103439101A CN 201310383723X A CN201310383723X A CN 201310383723XA CN 201310383723 A CN201310383723 A CN 201310383723A CN 103439101 A CN103439101 A CN 103439101A
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Abstract
The invention relates to an intake manifold performance detection device and detection method. The intake manifold performance detection device comprises a pressure stabilizing cavity with the inner portion being provided with a hollow cavity and a manifold connecting plate which is fixedly arranged outside the pressure stabilizing cavity. The manifold connecting plate is provided with connecting holes which are connected with an intake manifold and are communicated with the hollow cavity. The manifold connecting plate is provided with control valves which conduct opening and closing control over the connecting holes and an air outlet pipe which is fixedly arranged outside the pressure stabilizing cavity and is communicated with the hollow cavity. A vortex generating device, a vortex momentum gage, a flow gage and a gas exhausting device are arranged inside the air outlet pipe, wherein the vortex generating device converts gas flowing out of the pressure stabilizing cavity into vortexes, the vortex momentum gage and the flow gage are used for detecting the intensity and the flow of the vortexes respectively, and the gas exhausting device is fixedly connected at the free end of the air outlet pipe. By means of the intake manifold performance detection device, the influence of various branch pipes of the intake manifold on airflow of cylinders can be detected, theoretical analysis and actual tests of the intake manifold are combined, and therefore reasonable and accurate evaluation can be achieved for the performance of the intake manifold.
Description
Technical field
The present invention relates to a kind of pick-up unit, relate in particular to a kind of inlet manifold device for detecting performance, the invention still further relates to a kind of inlet manifold method for testing performance.
Background technology
Air motion in the gasoline engine cylinder has material impact to the combustion process of engine, especially the air inlet structure of cylinder flow field constantly that ends, by near turbulence intensity, the gas velocity directly determined the time of ignition spark plug, and the distribution of cylinder fuel, thereby affect dynamic property, economy and the emission performance of engine, this just claims to the performance parameter of air intake duct and inlet manifold.
At present, the method detected for inlet characteristic, be mainly to use steady flow testbed of air passage to carry out steady state test, and carry out two kinds of methods of CFD Mathematical Model Analysis.But, for the detection of inlet manifold performance, present stage is just carried out the CFD analysis theoretically, also do not have separately the inlet manifold entity to be tested to the method detected.
The inlet manifold performance is carried out to theoretic CFD analysis, and due to the inlet manifold entity and whether digital-to-analogue is in full accord can't be detected, therefore this method exists inevitable drawback.For example, when inlet manifold being carried out to the CFD analysis, be the supposition inlet manifold each arm on each cylinder gases, mobile impact is consistent, but when the inlet manifold that reality is processed is installed on cylinder cover and is tested, each arm of inlet manifold is inconsistent for the impact of each cylinder, and there is no certain rule, and inlet manifold is arranged on cylinder head and tests while detecting, operate very complicated, can not determine it is the problem of inlet manifold when the detected value fluctuation is larger, or the shape problem of the air flue of cylinder head own, this reviews and causes very large puzzlement problem, also increase research and development and the detection difficult of inlet manifold.
Summary of the invention
For solving the deficiencies in the prior art, the invention provides a kind of inlet manifold device for detecting performance and detection method, by detecting the impact of each arm of inlet manifold on each cylinder air-flow, realization combines with actual tests to the inlet manifold theoretical analysis, the inlet manifold performance is had rationally, estimates accurately.
For achieving the above object, inlet manifold device for detecting performance of the present invention comprises:
Pressure stabilizing cavity, its inside has hollow cavity;
The manifold web joint, be fixedly installed on the pressure stabilizing cavity outside, which is provided with to be connected with each arm of inlet manifold, and the connecting hole be communicated with hollow cavity, be provided with the operation valve that connecting hole is carried out to open and close controlling on the manifold web joint;
Escape pipe, be fixedly installed on pressure stabilizing cavity outside and be communicated with hollow cavity, and its inside is provided with the vortex generating means that the pressure stabilizing cavity effluent air is changed into to eddy current, and swirl momentum meter and flowmeter that intensity and the flow of eddy current detected respectively;
Gas exhausting device, be fixed on the free end of escape pipe.
As limitation of the invention, described gas exhausting device is vacuum blower.
As improvement of the present invention, be provided with the vacuum meter that vacuum tightness in hollow cavity is measured on described pressure stabilizing cavity, between gas exhausting device and pressure stabilizing cavity, be provided with hollow cavity in gas discharge the valve carry out open and close controlling.
As limitation of the invention, described manifold web joint and escape pipe are arranged on two opposite flanks of pressure stabilizing cavity.
Inlet manifold method for testing performance of the present invention comprises the steps:
Improvement as to aforesaid way also comprises before step 1:
Step a, make each operation valve all rotate to be closed condition, by gas exhausting device, pressure stabilizing cavity vacuumized, and when vacuum tightness is 10KPa, detects the sealing of pressure stabilizing cavity.
Adopt technique scheme, can directly to the air inflow of each arm of inlet manifold and the ability of formation eddy current, be detected separately, thereby show that whether each arm of inlet manifold is consistent for the impact of each cylinder air-flow, it is combined with inlet manifold CFD theoretical analysis, can to inlet manifold performance have rationally accurately and estimate, the drawback of having avoided single CFD theoretical analysis to bring, also can save the trouble of complicated operation while being detected on cylinder cover, be beneficial to simultaneously testing result is analyzed to judgement.
The accompanying drawing explanation
Below in conjunction with the drawings and the specific embodiments, the present invention is done further to describe in detail:
The front elevation that Fig. 1 is the embodiment of the present invention one structure;
The vertical view that Fig. 2 is structure shown in Fig. 1;
The A-A face portion cut-open view that Fig. 3 is Fig. 2;
Fig. 4 is manifold web joint front elevation;
Fig. 5 is manifold web joint upward view;
The vertical view that Fig. 6 is pressure stabilizing cavity;
The A-A face cut-open view that Fig. 7 is Fig. 6;
Fig. 8 is the vortex generator structural representation;
In figure: 1, pressure stabilizing cavity; 2, air intake opening; 3, exhausr port; 4, pressure stabilizing cavity mounting hole; 5, manifold web joint; 51, connecting hole; 52, web joint mounting hole; 53, seal groove; 6, operation valve; 7, escape pipe; 8, vortex generator; 81, central shaft; 82, retainer plate; 83, blade; 9, vacuum blower; 10, valve; 11, swirl momentum meter; 12, flowmeter; 13, vacuum meter; 14, hollow cavity.
Embodiment
embodiment mono-
The present embodiment relates to a kind of inlet manifold device for detecting performance, by shown in Fig. 1 to Fig. 3, it comprises pressure stabilizing cavity 1, be arranged on the manifold web joint 5 of pressure stabilizing cavity 1 upper surface, and the escape pipe 7 that is arranged on pressure stabilizing cavity 1 lower surface, be provided with a vortex generator 8 with pressure stabilizing cavity 1 junction in escape pipe 7, be connected with vacuum blower 9 at escape pipe 7 ends, be provided with near vacuum blower 9 places the valve 10 opened and closed for controlling escape pipe 7 on escape pipe 7, be provided with swirl momentum meter 11 and flowmeter 12 for the interior gas of escape pipe 7 is detected on escape pipe 7, also be provided with the vacuum meter 13 that its internal vacuum is detected on pressure stabilizing cavity 1.
The structure of manifold web joint 5 as shown in Figure 4 and Figure 5, it is a rectangular parallelepiped, offer a plurality of connecting holes 51 corresponding with each arm outlet (not shown) of inlet manifold at manifold web joint 5 middle parts, be provided with a circle seal groove 53 around connecting hole 51, it can increase and sealing after pressure stabilizing cavity 1 is connected, evenly be provided with web joint mounting hole 52 around seal groove 53, also be provided with the operation valve 6 opened and closed for control linkage hole 51 in each connecting hole 51, it is installed on the side surface of manifold web joint 5, the butterfly valve of operation valve 6 for matching with connecting hole 51 internal diameters in the present embodiment, certainly, it can be also the other forms of valve with good seal performance.
The structure of pressure stabilizing cavity 1 as shown in Figure 6 and Figure 7, its inside is hollow cavity 14, can be stablized the inner cylinder pressure of escape pipe 7 simulations, while guaranteeing each arm of inlet manifold is tested, pressure differential is stable, offer air intake opening 2 in pressure stabilizing cavity 1 upper surface middle part, the size of the undersized of air intake opening 2 seal groove 53 on manifold web joint 5, evenly be provided with the pressure stabilizing cavity mounting hole 4 corresponding with web joint mounting hole 52 positions on manifold web joint 5 around air intake opening 2, it is for the connection with manifold web joint 5, offer exhausr port 3 on the lower surface of pressure stabilizing cavity 1, it is connected with escape pipe 7.
The structure of vortex generator 8 as shown in Figure 8, it comprises central shaft 81, equally distributed blade 83 centered by central shaft 81, with be centered around the retainer plate 82 be connected with it around blade 83, in the present embodiment, vortex generator 8 is for being arranged in escape pipe 7, retainer plate 82 outer circumference surfaces and escape pipe 7 inside surfaces are sealed and matched, the number of blade 83 is 7, 9, between 11 threes one, the pitch angle of blade 83 remains between 0 ° to 10 °, pressure differential with assurance blade 83 upper and lower surfaces is suitable, avoid due to the excessive generation backflow phenomenon in pitch angle, the curvature minimum value of blade 83 is 0, maximal value is between 0.02～0.03, resistance at this scope intra vane 83 is moderate, both can form the eddy current of being convenient to measurement that intensity is suitable under certain pressure reduction, can not make gas flow too small because of the resistance that deep camber produces excessively again, the height of blade 83 is can guarantee that suitable air supplying distance gets final product.Certainly except vortex generator 8 structures shown in the present embodiment, it can be also other forms of vortex generating means.
embodiment bis-
The present embodiment relates to a kind of inlet manifold method for testing performance, and the method comprises the steps:
Step a, make each operation valve 6 all rotate to be closed condition, and open 9 pairs of pressure stabilizing cavities 1 of vacuum blower and vacuumize, when vacuum meter 13 shows that vacuum tightness reaches 10KPa, valve-off 10, standing a period of time is to detect the sealing of pressure stabilizing cavity 1;
Utilize the detected swirl gas strength of vortex of swirl momentum meter 11 and flowmeter 12 and gas flow, just can learn the impact of each inlet manifold arm countercylinder air-flow, in conjunction with the CFD theoretical analysis to inlet manifold, just can have rationally and estimate accurately the inlet manifold performance again.
Claims (6)
1. an inlet manifold device for detecting performance is characterized in that comprising:
Pressure stabilizing cavity, its inside has hollow cavity;
The manifold web joint, be fixedly installed on the pressure stabilizing cavity outside, which is provided with to be connected with each arm of inlet manifold, and the connecting hole be communicated with hollow cavity, be provided with the operation valve that connecting hole is carried out to open and close controlling on the manifold web joint;
Escape pipe, be fixedly installed on pressure stabilizing cavity outside and be communicated with hollow cavity, and its inside is provided with the vortex generating means that the pressure stabilizing cavity effluent air is changed into to eddy current, and swirl momentum meter and flowmeter that intensity and the flow of eddy current detected respectively;
Gas exhausting device, be fixed on the free end of escape pipe.
2. inlet manifold device for detecting performance according to claim 1, it is characterized in that: described gas exhausting device is vacuum blower.
3. inlet manifold device for detecting performance according to claim 1, it is characterized in that: be provided with the vacuum meter that vacuum tightness in hollow cavity is measured on described pressure stabilizing cavity, between gas exhausting device and pressure stabilizing cavity, be provided with hollow cavity in gas discharge the valve carry out open and close controlling.
4. according to the described inlet manifold device for detecting performance of any one in claims 1 to 3, it is characterized in that: described manifold web joint and escape pipe are arranged on two opposite flanks of pressure stabilizing cavity.
5. an inlet manifold method for testing performance, is characterized in that the method comprises the steps:
Step 1, open one of them inlet manifold arm by operation valve, makes the air-flow in this inlet manifold arm enter into pressure stabilizing cavity;
Step 2, when the air-flow in pressure stabilizing cavity is discharged by escape pipe, change air-flow into eddy current by vortex generating means;
Step 3, detected respectively intensity and the flow that forms eddy current in escape pipe by swirl momentum meter and flowmeter;
Step 4, repeating step one, to step 3, completes the detection to other inlet manifold arms.
6. inlet manifold method for testing performance according to claim 5 is characterized in that also comprising before step 1:
Step a, make each operation valve all rotate to be closed condition, by gas exhausting device, pressure stabilizing cavity vacuumized, and when vacuum tightness is 10KPa, detects the sealing of pressure stabilizing cavity.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310383723.XA CN103439101B (en) | 2013-08-29 | 2013-08-29 | Inlet manifold device for detecting performance and detection method |
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| CN201310383723.XA CN103439101B (en) | 2013-08-29 | 2013-08-29 | Inlet manifold device for detecting performance and detection method |
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| CN103439101A true CN103439101A (en) | 2013-12-11 |
| CN103439101B CN103439101B (en) | 2016-05-04 |
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| CN104596747A (en) * | 2014-12-26 | 2015-05-06 | 舟山市恒威船舶配件有限公司 | Vacuum flux test device of air pipe head |
| CN105606365A (en) * | 2015-12-16 | 2016-05-25 | 中国船舶重工集团公司第七一一研究所 | Engine airway testing method |
| CN106644314A (en) * | 2016-12-29 | 2017-05-10 | 江西鑫田车业有限公司 | Air inlet manifold air-tightness detection device |
| CN113898507A (en) * | 2021-08-24 | 2022-01-07 | 义乌吉利动力总成有限公司 | Flow coefficient testing method and optimization method for hybrid engine and testing bench |
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| CN106644314A (en) * | 2016-12-29 | 2017-05-10 | 江西鑫田车业有限公司 | Air inlet manifold air-tightness detection device |
| CN113898507A (en) * | 2021-08-24 | 2022-01-07 | 义乌吉利动力总成有限公司 | Flow coefficient testing method and optimization method for hybrid engine and testing bench |
| CN113898507B (en) * | 2021-08-24 | 2022-09-13 | 义乌吉利动力总成有限公司 | Flow coefficient testing method, optimization method and testing rack of hybrid engine |
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| CN103439101B (en) | 2016-05-04 |
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