CN102494897A - Exhaust gas sampling switching device and control method for same - Google Patents
Exhaust gas sampling switching device and control method for same Download PDFInfo
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- CN102494897A CN102494897A CN2011103334814A CN201110333481A CN102494897A CN 102494897 A CN102494897 A CN 102494897A CN 2011103334814 A CN2011103334814 A CN 2011103334814A CN 201110333481 A CN201110333481 A CN 201110333481A CN 102494897 A CN102494897 A CN 102494897A
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- solenoid valve
- switching device
- device shifter
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Abstract
The invention provides a conveniently controlled exhaust gas sampling switching device and a control method for the same to switch exhaust gas sampling pipelines in real time. The exhaust gas sampling switching device comprises a ventilating pipe with a gas inlet and a gas outlet, the gas inlet is provided with a main electromagnetic valve, a body of the ventilating pipe is communicated with a plurality of gas inlet branch pipes, and a branch electromagnetic valve is arranged on each gas inlet branch pipe. The control method includes connecting the gas inlet branch pipes of the exhaust gas sampling switching device with sampling points during an exhaust test, and connecting the gas outlet with an exhaust analyzer. Concrete steps include: A, firstly closing all the branch electromagnetic valves, opening the main electromagnetic valve, keeping the main electromagnetic valve open for preset time and sucking air by the aid of the exhaust analyzer; B, closing the main electromagnetic valve, opening the branch electromagnetic valve corresponding to one sampling point to be analyzed and sucking gas at the sampling point by the aid of the exhaust analyzer for analysis; and C, repeating the steps A and B when switching the other sampling points.
Description
Technical field
The invention belongs to the engine manufacturing technology field, specially refer to a kind of emission gases sampling switching device shifter and control method thereof that is applied in the engine emissions testing.
Background technology
Environmental pollution at present is serious day by day, and masses and national standard are increasingly high to the emission request of engine, and corresponding engine emissions testing is also more and more, and it is also more and more careful to require.Because the engine emission analytical equipment costs an arm and a leg, for practicing thrift cost, exhaust apparatus generally all adopts the single channel acquisition system, but the single channel acquisition system can only be carried out spot measurement, can not carry out the multimetering under the same operating mode.Like this in carrying out the transformation efficiency process of the test of catalyst converter and other various converters; Just can't measure forward and backward emission behaviour simultaneously at 2; Mainly realize multimetering in the process of the test at present through dismantling sample lines repeatedly; Use this kind method the inconsistent error that produces of engine operating condition will occur and reach the problems such as parts inefficacy that dismounting repeatedly causes, influence test efficiency and accuracy.
Summary of the invention
The objective of the invention is to propose a kind of control emission gases sampling switching device shifter and control method thereof easily, realize the real-time switching of emission gases sample lines.
Emission gases sampling switching device shifter of the present invention comprises a snorkel with air intake opening and gas outlet, and said air intake opening is provided with main solenoid valve; The pipe shaft of said snorkel is connected with several air inlet take-off pipes, is provided with branch's solenoid valve on said each air inlet take-off pipe.
The control method of above-mentioned emission gases sampling switching device shifter is following:
When emission testing, the sample air inlet take-off pipe of switching device shifter of emission gases is linked to each other with sampled point, the sample gas outlet of switching device shifter of emission gases is linked to each other with emission analyzer, key is to comprise the steps:
A: at first close all and divide solenoid valve, open main solenoid valve, and keep the main solenoid valve opening schedule time, utilize emission analyzer to draw atmosphere;
B: close main solenoid valve, open pairing minute solenoid valve of sampled point to be analyzed then, the gas that utilizes emission analyzer to draw this sampled point is analyzed;
C: when switching other sampled point, repeat A, B step.
Above-mentioned A step can utilize fresh air to clear up the gas of last time test residual in the pipeline, guarantees that sample gas afterwards is not contaminated, improves the accuracy of test figure.
Further; This emission gases sampling switching device shifter also comprises a controller; Said controller links to each other with said main solenoid valve and each branch's solenoid valve and controls the work of main solenoid valve and each branch's solenoid valve; Can all Control work be carried out on a controller like this, improve comfort level.
Further, said controller is provided with the pilot lamp of the working condition that is used to show main solenoid valve and each branch's solenoid valve, so that the duty of each solenoid valve is more directly perceived, is convenient to that testing crew is observed and control.
Further; This emission gases sampling switching device shifter comprises that also one is matched with the telepilot of remote control main solenoid valve and each branch's solenoid valve work with said controller; Utilize telepilot to control, need not operating personnel, convenient and safety near testing position.
The quantity of said air inlet take-off pipe is 2～8, to satisfy the exhaust system test needs of engine.
The end of said each air inlet take-off pipe is provided with screw thread, is connected with sampled point through threaded engagement, helps improving seal degree, prevents that sample gas from leaking and atmosphere gets into emission analyzer via the air inlet take-off pipe, the accuracy of influence test.
Emission gases sampling switching device shifter of the present invention can be accomplished the switch operating of emission gases easily, improves test efficiency and accuracy, reduces experimentation cost.
Description of drawings
Fig. 1 is the schematic diagram of emission gases sampling switching device shifter of the present invention.
Fig. 2 is the user mode figure of emission gases sampling switching device shifter of the present invention.
Embodiment
Contrast accompanying drawing below; Through the description to embodiment, the effect of mutual alignment between the shape of specific embodiments of the invention such as related each member, structure, the each several part and annexation, each several part and principle of work etc. are done further to specify.
Embodiment 1:
As shown in Figure 1, the emission gases sampling switching device shifter of present embodiment comprises a snorkel 3 with air intake opening 1 and gas outlet 2, and air intake opening 1 is provided with main solenoid valve 4; The pipe shaft of snorkel 3 is connected with four air inlet take-off pipes 5, is provided with branch's solenoid valve 6 on each air inlet take-off pipe 5.
The emission gases sampling switching device shifter of present embodiment also comprises a controller 7; Controller 7 links to each other with main solenoid valve 4 and each branch's solenoid valve 6 and controls the work of main solenoid valve 4 and each branch's solenoid valve 6, and controller 7 is provided with the pilot lamp 8 of the working condition that is used to show main solenoid valve 4 and each branch's solenoid valve 6.
The emission gases sampling switching device shifter of present embodiment also comprises a telepilot 9 that matches and work with remote control main solenoid valve 4 and each branch's solenoid valve 6 with controller 7.
The control method of above-mentioned emission gases sampling switching device shifter is following:
(main solenoid valve that do not draw among Fig. 2, the air inlet take-off pipe that divides solenoid valve, telepilot and do not use) as shown in Figure 2; When emission testing, sample two air inlet take-off pipes 5 of switching device shifter of emission gases are linked to each other with two sampled points 10 that are positioned at the forward and backward position of gas outlet respectively; The sample gas outlet 2 of switching device shifter of emission gases is linked to each other with emission analyzer 11, and test procedure is following:
A: at first close all and divide solenoid valve 6; Open main solenoid valve 4, and keep the main solenoid valve opening schedule time (at least three ten seconds), utilize emission analyzer 10 to draw fresh atmosphere; Gas with last time test residual in the cleaning pipeline guarantees that sample gas afterwards is not contaminated;
B: close main solenoid valve 4, open pairing minute solenoid valve 6 of sampled point to be analyzed then, the gas that utilizes emission analyzer 10 to draw this sampled point is analyzed;
C: when switching other sampled point, repeat A, B step.
Claims (7)
1. an emission gases sampling switching device shifter is characterized in that comprising a snorkel with air intake opening and gas outlet, and said air intake opening is provided with main solenoid valve; The pipe shaft of said snorkel is connected with several air inlet take-off pipes, is provided with branch's solenoid valve on said each air inlet take-off pipe.
2. emission gases sampling switching device shifter according to claim 1; It is characterized in that this emission gases sampling switching device shifter also comprises a controller, said controller links to each other with said main solenoid valve and each branch's solenoid valve and controls the work of main solenoid valve and each branch's solenoid valve.
3. emission gases according to claim 2 sampling switching device shifter is characterized in that said controller is provided with the pilot lamp of the working condition that is used to show main solenoid valve and each branch's solenoid valve.
4. according to claim 2 or 3 described emission gases sampling switching device shifters, it is characterized in that this emission gases sampling switching device shifter comprises that also one is matched with the telepilot of remote control main solenoid valve and each branch's solenoid valve work with said controller.
5. emission gases sampling switching device shifter according to claim 4, the quantity that it is characterized in that said air inlet take-off pipe is 2～8.
6. emission gases sampling switching device shifter according to claim 4 is characterized in that the end of said each air inlet take-off pipe is provided with screw thread.
7. the control method of emission gases sampling switching device shifter according to claim 1; When emission testing, the sample air inlet take-off pipe of switching device shifter of emission gases is linked to each other with sampled point; The sample gas outlet of switching device shifter of emission gases is linked to each other with emission analyzer, it is characterized in that comprising the steps:
A: at first close all and divide solenoid valve, open main solenoid valve, and keep the main solenoid valve opening schedule time, utilize emission analyzer to draw atmosphere;
B: close main solenoid valve, open pairing minute solenoid valve of sampled point to be analyzed then, the gas that utilizes emission analyzer to draw this sampled point is analyzed;
C: when switching other sampled point, repeat A, B step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103334814A CN102494897A (en) | 2011-10-28 | 2011-10-28 | Exhaust gas sampling switching device and control method for same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103334814A CN102494897A (en) | 2011-10-28 | 2011-10-28 | Exhaust gas sampling switching device and control method for same |
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| CN102494897A true CN102494897A (en) | 2012-06-13 |
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| CN2011103334814A Pending CN102494897A (en) | 2011-10-28 | 2011-10-28 | Exhaust gas sampling switching device and control method for same |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108444721A (en) * | 2018-03-06 | 2018-08-24 | 广西玉柴机器股份有限公司 | Multi-channel gas switching device |
| CN115219208A (en) * | 2022-06-08 | 2022-10-21 | 哈尔滨东安汽车发动机制造有限公司 | Test method for engine EGR system calibration |
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| CN101701873A (en) * | 2009-11-13 | 2010-05-05 | 武汉理工大学 | A bench test device and control method for heat-to-electricity conversion of automobile engine exhaust waste heat |
| CN102062705A (en) * | 2010-10-29 | 2011-05-18 | 北京工业大学 | Combined tail gas collection system for multi-cylinder engine and control method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE2407031A1 (en) * | 1973-02-15 | 1974-08-22 | Collin Consult Ab Lars | METHOD AND EQUIPMENT FOR PERFORMING EXHAUST EMISSION TESTS ON VEHICLE ENGINES |
| DE19811788A1 (en) * | 1998-03-18 | 1999-09-23 | Volkswagen Ag | Valve assembly for measurement equipment investigating properties of exhaust gases |
| CN1446723A (en) * | 2002-03-27 | 2003-10-08 | 苏京 | Method and device for making whistle to give warning and emergency exhaust to brake when dispatched train set being pushed forward |
| US6935308B1 (en) * | 2004-03-09 | 2005-08-30 | Mitsubishi Denki Kabushiki Kaisha | Operation control device of multi-cylinder engine |
| CN1858588A (en) * | 2005-04-30 | 2006-11-08 | 上海中油企业集团有限公司 | Test device for quick detecting catalyst durability |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108444721A (en) * | 2018-03-06 | 2018-08-24 | 广西玉柴机器股份有限公司 | Multi-channel gas switching device |
| CN115219208A (en) * | 2022-06-08 | 2022-10-21 | 哈尔滨东安汽车发动机制造有限公司 | Test method for engine EGR system calibration |
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Application publication date: 20120613 |