CN101514940B - Flow characteristics tester for intake and exhaust system of small gasoline engine and exhaust control method - Google Patents
Flow characteristics tester for intake and exhaust system of small gasoline engine and exhaust control method Download PDFInfo
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- CN101514940B CN101514940B CN2008102342737A CN200810234273A CN101514940B CN 101514940 B CN101514940 B CN 101514940B CN 2008102342737 A CN2008102342737 A CN 2008102342737A CN 200810234273 A CN200810234273 A CN 200810234273A CN 101514940 B CN101514940 B CN 101514940B
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Abstract
The invention relates to a flow characteristics tester for an intake and exhaust system of a small gasoline engine and an exhaust control method. The flow characteristics tester for the intake and exhaust system of the small gasoline engine can complete a flow test of an air cleaner (or a silencer), a test for an intake and exhaust passage of a cylinder cover, and a combined test of the two, and mainly comprises a working platform (14), a simulation cylinder liner (2), a cylinder barrel (20), a valve lift adjusting element (12), a pressure stabilizing cylinder (1), a pump (17), pressure sensors (5) and (15), a flow sensor (19), a valve lift sensor (7) and the like. The tester can perform tests and detection according to different requirements on product research and development, incoming inspection, and first item inspection or online inspection in the assembly of the gasoline engine, selects carburetors with different main jets according to results of the first item inspection or the online inspection, ensures consistency of oil-gas mixing ratio of the gasoline engine and controls consistency of emission performance and batch production of the gasoline engine.
Description
Technical field
The present invention relates to a kind of gasoline engine test unit and method, the present invention is a kind of miniature gasoline engine air inlet system and exhaust system flow characteristics tester and discharge control method of being used in particular.
Background technology
At present, domestic many for calculating the engine air flue experimental study of estimating swirl ratio, be mainly used in diesel engine, debug by producing as the intelligent Steady Flow Test Rig of putting down in writing in the document, and drop into and use, facts have proved the intelligent level that has both improved manufacturer, detect for product again and quality assurance provides foundation.System operation is easy, and is time saving and energy saving, easy to maintenance.But research in this regard is in blank substantially to small utility gasoline engine both at home and abroad at present, because gasoline engine inlet and exhaust system flow characteristics is poor, influence the production properties of product, cause the product quality level fluctuation big, the oil gas mixing ratio of Gasoline Engine changes greatly, make petrol engine dynamic property, economy and emission behavior instability, particularly discharge the requirement that does not reach relevant laws and regulations, standard.In addition, because inlet and exhaust system mainly comprises the air intake duct of air cleaner, cylinder head and exhaust duct, four parts of sound suppressor, method is in the past always separated the test in the flow test of air cleaner, sound suppressor and inlet and outlet road on the several separate testing table and is finished, this has caused the waste of resources such as space, cost, is difficult to popularize in engine production enterprise and uses.
Summary of the invention
Technical matters to be solved by this invention is to test by special project to control gasoline engine performance and emission level, a kind of miniature gasoline engine air inlet system and exhaust system flow characteristics tester and discharge control method of being used for is provided, this test unit can be tested the inlet and exhaust system flow characteristics, be used for the online inspection of the research and development of inlet and exhaust system product and improvement, conformity of production, by the oil gas mixing ratio of control inlet and outlet flow control gasoline engine, guarantee the stable and low emission behavior of gasoline engine power, oil consumption.Simultaneously with the inlet and outlet road test combinations of air cleaner, sound suppressor flow test and cylinder head on device, reduced user's the acquisition cost and the convenience of use.
The technical solution adopted in the present invention is, according to the concrete parameter designing of miniature gasoline engine each ingredient of whole test device, link to each other by one section siphunculus that pressure transducer is housed between air cleaner and the engine cylinder cap air intake duct or between cylinder head exhaust duct and the sound suppressor, the cylinder head bottom surface is installed on the workbench of testing table, by bolt hole, guarantee that with the register pin on the workbench cylinder head is identical with gasoline engine practical set situation with the cylinder relative position of testing table; The valve stroke of movably being furnished with the valve stroke sensor also is installed on testing table workbench face regulates parts, regulate required valve stroke value when being used to test; Link with cylinder barrel below the workbench, the simulation cylinder that is used for mating the different model engine test is housed in cylinder barrel.A cylinder barrel and a tube of pressure-stabilizing link, and two tube of pressure-stabilizing are arranged, and on first tube of pressure-stabilizing top pressure transducer are housed, and are used to measure the test pressure of inlet and exhaust system; Between two tube of pressure-stabilizing air flowmeter is housed, the valves of two control air mass flows are housed on back tube of pressure-stabilizing is taken over, one communicates with atmosphere, and another connects with aspiration pump, makes things convenient for different flow is adjusted.This test unit is mainly estimated the inlet and exhaust system of gasoline engine of manufacturing enterprise or the primary liquidity energy of certain parts.
This device adopts the different adjustment mode can realize following function: 1. regulating the inlet valve lift is that maximal value is constant, can carry out the test of air cleaner resistance and discharge characteristic; 2. regulating exhaust valve lift is that maximal value is constant, can carry out the test of sound suppressor resistance and discharge characteristic; 3. adopt pressure differential method tests such as current stabilization, keeping the pressure of the pressure transducer on tube of pressure-stabilizing top is definite value, measure respectively under the different air valve lift, volumetric flow of gas Q through air cleaner and air intake duct (or exhaust duct and sound suppressor), the flowing gas temperature t, calculate flow value, flow characteristics and the coefficient of flow of air inlet (or exhaust) system, 4. do not assemble air cleaner or sound suppressor on the cylinder head, or with inlet and outlet road test core box, with 3. identical test method test, can test the flow characteristics and the coefficient of flow that draw air intake duct or exhaust duct.This sample test unit can be finished function corresponding according to first item inspection in research and development of products, incoming inspection and the gasoline engine assembling or the different demands of controlling in X-ray inspection X guaranteed performance consistance.
3. function with this test unit is used for first machine detection or the online sampling observation that gasoline engine is criticized assembling, the flow value of the intake and exhaust system that records according to test, the carburetor (carburetor flow divides 3～4 shelves with different main jets) of apolegamy corresponding discharge, excess air coefficient when making the gasoline engine running is definite value substantially, scattered error is produced in control in batches, excess air coefficient and complete machine discharging have substantial connection, thereby the low emission result of control gasoline engine, guaranteed the consistance of producing in batches, satisfy developed country and constantly add tight Abgasgesetz limit value requirement, reduce pollution environment.Adopting said method can solve well China produce in batches miniature gasoline engine discharging scattered error big, cause the underproof industry difficult problem of product.
Beneficial effect of the present invention is and can intactly tests the miniature gasoline engine inlet and exhaust system on same bench teat experiment device, understands the circulation of air performance of various combination spare of gasoline engine inlet and exhaust system and technology, quality level easily.The air inlet system and exhaust system mass discrepancy of criticizing at difference is with the key index of most economical, effective method control gasoline engine product.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1: miniature gasoline engine air inlet system and exhaust system circulation of air performance test unit schematic diagram.
Among the figure, 1. pressurizer tank is 2. simulated cylinder, 3. air cleaner or sound suppressor, 4. connecting pipe, 5. pressure transducer one, 6. valve stroke adjuster bar, 7. valve stroke sensor, 8 empty filter (or sound suppressor) resistance Displaying Meters, 9. valve stroke Displaying Meter, 10. inner pressure of air cylinder Displaying Meter, 11. flow displaying instruments, 12. valve stroke adjusting parts, 13. tested cylinder head, 14. pressure transducer two, 15. by-pass valve, 16. suction fans, 17. back pressurizer tank, 18. flowmeter, 19. workbenches, 20. cylinder barrels.
Embodiment
In conjunction with Fig. 1, a pressure transducer one (5) is installed on the connecting pipe (4), (row) air flue that advances that connecting pipe one end is connected cylinder head (13) advances (going out) mouth, the other end connects air cleaner or sound suppressor (3), workbench (14), cylinder barrel (20) are connected one with voltage stabilizing bucket (1) with bolt, simulation cylinder (2) internal diameter is identical with tested gasoline engine cylinder diameter, and different type of machines is replaceable.The end face of simulation cylinder has two register pins, and position dimension is identical by the cylinder head bolt hole of institute's test gasoline engine.Valve stroke is regulated on the parts (12) valve stroke sensor (7) and valve stroke adjuster bar (6) is housed, and these parts are fixed by bolts on the workbench, and can by about the valve position, front and back adjust, the assurance valve is concentric with valve stroke adjuster bar (6).Finish function 1., during test 2., valve stroke is adjusted to maximum, writes down the pressure transducer one (5) of different valves (16) aperture and the numerical value of air flowmeter (19) respectively; When finishing 3. test of function, valve stroke is regulated from small to large, writes down the pressure transducer two (15) of different valves (16) aperture and the numerical value of air flowmeter (19) respectively; When finishing 4. test of function, only test cylinder head (13), do not assemble air cleaner or sound suppressor (3), valve stroke is regulated from small to large, when writing down different valves (16) aperture respectively, and the numerical value of pressure transducer two (15) and air flowmeter (19).Above-mentioned measurement result draws the evaluating index of gas handling system, exhaust system, air cleaner, sound suppressor as calculated.
To different miniature gasoline engine available research achievements be: excess air coefficient is the most critical factor that influences the Gasoline Engine discharge value, has drawn the relation of excess air coefficient and Gasoline Engine discharging already.When finishing 3. test of function, can draw the flow parameter of gasoline engine air inlet system and exhaust system, select the carburetor of suitable main jet for use, can guarantee that gasoline engine excess air coefficient value is a certain value, to producing in batches with first item inspection or on-line detection method control gasoline engine oil gas mixing ratio, the gasoline engine excess air coefficient of batch process is changed in very little scope, and gasoline exhaust is minimum, controls the consistance of the gasoline exhaust value of gasoline exhaust performance and batch process with this.The relation of the flow parameter of different main jets of carburetor and air inlet system and exhaust system is determined by test, provides in technical papers with technical parameter.
Claims (2)
1. one kind is used for miniature gasoline engine air inlet system and exhaust system flow characteristics tester, the air cleaner of gasoline engine or sound suppressor link to each other with cylinder head (13) by the connecting pipe (4) that pressure transducer is housed, use finger setting that cylinder head is fixed on the workbench (14), valve stroke is housed on the workbench regulates parts (12), workbench is fixed on the cylinder barrel (20), described cylinder barrel (20) is contained on the pressurizer tank (1), cover simulation cylinder (2) in cylinder barrel, at pressurizer tank (1) pressure transducer is housed, described pressurizer tank (1) is equipped with air flowmeter (19), described air flowmeter (19) one ends connect another pressurizer tank, air flowmeter (19) is between two pressurizer tanks, afterbody at another pressurizer tank is provided with two valves (16) that are used to control air mass flow, one communicates with atmosphere, another links to each other with pump (17), it is characterized in that: according to research and development of products, first item inspection or in the different demands of X-ray inspection X in the assembling of incoming inspection and gasoline engine, the miniature gasoline engine air inlet system and exhaust system are tested, with the flow test of air cleaner, the flow test of sound suppressor, the test of air intake duct, the composite test of the test of the test of exhaust duct and the flow test of air cleaner and air intake duct, the composite test of the flow test of sound suppressor and the test of exhaust duct is combined on the same test unit and finishes.
2. a kind of miniature gasoline engine air inlet system and exhaust system flow characteristics tester that is used for according to claim 1, it is characterized in that: described test unit is by changing the simulation cylinder (2) in the cylinder barrel, move easily and adjust the position that valve stroke is regulated parts (12), the gasoline engine product variety of different cylinder diameters is finished on a test unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102342737A CN101514940B (en) | 2008-11-28 | 2008-11-28 | Flow characteristics tester for intake and exhaust system of small gasoline engine and exhaust control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102342737A CN101514940B (en) | 2008-11-28 | 2008-11-28 | Flow characteristics tester for intake and exhaust system of small gasoline engine and exhaust control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101514940A CN101514940A (en) | 2009-08-26 |
| CN101514940B true CN101514940B (en) | 2010-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008102342737A Expired - Fee Related CN101514940B (en) | 2008-11-28 | 2008-11-28 | Flow characteristics tester for intake and exhaust system of small gasoline engine and exhaust control method |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102095587B (en) * | 2010-12-17 | 2012-09-19 | 杭州银轮科技有限公司 | Simulation test bed used for engine exhaust aftertreatment device |
| CN102564767A (en) * | 2012-03-06 | 2012-07-11 | 浙江吉利汽车研究院有限公司 | Intake resistance regulating device and performance testing device provided with same and used for air intake system |
| CN103452617B (en) * | 2013-09-05 | 2015-08-26 | 中国北方发动机研究所(天津) | A kind of valve lift controlling device |
| CN103454091B (en) * | 2013-09-12 | 2016-02-10 | 中国船舶重工集团公司第七一一研究所 | The flowing property token test device of internal combustion engine tee air inlet-outlet pipe |
| CN103884508B (en) * | 2014-01-27 | 2016-04-06 | 中国北方发动机研究所(天津) | A kind of device realizing the test of opposed two-stroke cylinder sleeve air-flow |
| CN104316325A (en) * | 2014-08-15 | 2015-01-28 | 安徽江淮汽车股份有限公司 | Simulated cylinder sleeve for engine airway |
| CN106678033B (en) * | 2017-03-10 | 2019-11-15 | 重庆建设车用空调器有限责任公司 | A kind of compressor valve valve block aperture test device |
| CN108035825B (en) * | 2017-12-12 | 2023-09-05 | 中国汽车技术研究中心 | Engine oil blending combustion device and method for GPF aging of in-cylinder direct injection gasoline engine |
| CN112302755A (en) * | 2019-08-02 | 2021-02-02 | 广州汽车集团股份有限公司 | Engine valve lift adjusting device |
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- 2008-11-28 CN CN2008102342737A patent/CN101514940B/en not_active Expired - Fee Related
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| CN101514940A (en) | 2009-08-26 |
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