CN203658049U - Wide pressure scope EGR measuring system - Google Patents
Wide pressure scope EGR measuring system Download PDFInfo
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- CN203658049U CN203658049U CN201320895751.5U CN201320895751U CN203658049U CN 203658049 U CN203658049 U CN 203658049U CN 201320895751 U CN201320895751 U CN 201320895751U CN 203658049 U CN203658049 U CN 203658049U
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- measuring system
- vacuum pump
- egr
- wide pressure
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Abstract
The utility model relates to the engine exhaust gas recirculation (EGR) technology and further relates to a wide pressure scope EGR measuring system which is designed to be suitable for the air inlet end negative pressure condition. The wide pressure scope EGR measuring system comprises a three-way infrared CO2 tester 5, a circuit board 6 used for acquiring a measuring signal and an industrial control computer 7 connected with the circuit board and further comprises a vacuum pump 10 and a unidirectional throttle valve 11 which are sequentially connected in series between an air inlet pipe and a second way inlet instrument. Compared with the prior art, the wide pressure scope EGR measuring system is advantaged in that a test environment enables negative pressure at an air inlet end to realize pressure boosting through the vacuum pump, so normal air inlet of the second channel of the three-way infrared CO2 tester is guaranteed, and normal measurement is realized.
Description
Technical field:
The utility model relates to engines exhaust gas recirculation (EGR) technology, further relates to wide pressure limit EGR measuring system.
Background technology:
In engine test, the infrared CO of triple channel
2tester is the instrument of commonly using, and can effectively remove to measure CO
2concentration, can be derived the measurement leading about EGR.But, the cause of instrument itself, it has special requirement to inlet channel, can only be normal pressure, and engine is installing additional after ERG, and suction press there will be the negative pressure state of moment, and this has just limited to the infrared CO of triple channel
2the application of tester in EGR measures.Therefore, be necessary to develop a set of wide pressure limit EGR measuring system.
Summary of the invention:
The purpose of this utility model is to provide a set of wide pressure limit EGR measuring system applicable to inlet end negative pressure operating mode.
Wide pressure limit EGR measuring system, comprising: the infrared CO of triple channel
25, three passages of tester are respectively: first passage 2, be connected with the gas outlet 9 of engine 1, and measure exhaust CO
2value; Second channel 3, is connected with the draft tube 8 of engine 1, measures air inlet CO
2value; Third channel 4, is connected with surveying work ambient atmosphere, surveying work ambient atmosphere CO
2value; Circuit board 6, gathers measuring-signal; The industrial computer 7 being connected with circuit board; Also comprise: enter and be connected in series successively between instrument at draft tube and second channel: vacuum pump 10, one-way throttle valve 11.
As preferred version, also comprise: the first stop valve 13 between second channel one-way throttle valve and instrument; The second stop valve 14 of second channel exhaust ports, the pressure gauge 12 between one-way throttle valve and the first stop valve.
As further preferred version, described vacuum pump is diaphragm type vacuum pump.
The course of work of native system is as follows:
Connect the infrared CO of triple channel
2tester, opens vacuum pump, adjusts one-way throttle valve, guarantees that second channel is barotropic state; Read CO on three passages
2the reading of concentration.EGR leads and is:
((second channel CO
2concentration readings-third channel CO
2concentration readings)/the first logical CO
2concentration road reading) * 100%.
Because second channel keeps certain pressure state, in the time adopting preferred version, close the first stop valve, can judge whether second channel pipeline leaks gas, and then closes the second stop valve, can further judge whether the second channel of instrument internal leaks gas.
The utility model is with respect to the advantage of prior art:
(1) test environment of the present utility model can make the negative pressure of inlet end carry out supercharging by vacuum pump, carries out flow control by one-way throttle valve, guarantees the infrared CO of triple channel
2the normally air inlet of the second channel of tester, normally measures.
(2) because second channel keeps certain pressure state, in the time adopting preferred version, close the first stop valve, can judge whether second channel pipeline leaks gas, and then closes the second stop valve, can further judge whether the second channel of instrument internal leaks gas.
Accompanying drawing explanation:
Fig. 1 is embodiment system architecture schematic diagram.In figure, 1 represents engine, and 2 represent infrared CO
2the first passage of tester, 3 represent infrared CO
2the second channel of tester, 4 represent infrared CO
2the third channel of tester, 5 represent infrared CO
2tester, 6 represent circuit board, and 7 represent industrial computer, and 8 represent draft tube, and 9 represent gas outlet, and 10 represent vacuum pump, and 11 represent one-way throttle valve, 12 representative pressure meters, 13 represent the first stop valve, 14 represent the second stop valve; In figure, heavy line represents pipeline, and fine line represents circuit.
Embodiment:
Embodiment:
Wide pressure limit EGR measuring system, comprising: the infrared CO of triple channel
25, three passages of tester are respectively: first passage 2, be connected with the gas outlet 9 of engine 1, and measure exhaust CO
2value; Second channel 3, is connected with the draft tube 8 of engine 1, measures air inlet CO
2value; Third channel 4, is connected with surveying work ambient atmosphere, surveying work ambient atmosphere CO
2value; Circuit board 6, gathers measuring-signal; The industrial computer 7 being connected with circuit board; Also comprise: enter and be connected in series successively between instrument at draft tube and second channel: vacuum pump 10, one-way throttle valve 11; The first stop valve 13 between second channel one-way throttle valve and instrument; The second stop valve 14 of second channel exhaust ports, the pressure gauge 12 between one-way throttle valve and the first stop valve; Described vacuum pump is diaphragm type vacuum pump.
The course of work of native system is as follows:
Connect the infrared CO of triple channel
2tester, opens vacuum pump, adjusts one-way throttle valve, guarantees that second channel is barotropic state; Read CO on three passages
2the reading of concentration.EGR leads and is:
((second channel CO
2concentration readings-third channel CO
2concentration readings)/the first logical CO
2concentration road reading) * 100%.
Because, second channel keeps certain pressure state, in the time adopting preferred version, close the first stop valve, read pressure gauge reading, can judge that whether second channel pipeline leaks gas, and then closes the second stop valve, again read pressure gauge reading, can further judge whether the second channel of instrument internal leaks gas.
Claims (3)
1. wide pressure limit EGR measuring system, comprising: the infrared CO of triple channel
2tester (5), three passages respectively: first passage (2), be connected with the gas outlet (9) of engine (1), measure exhaust CO
2value; Second channel (3), is connected with the draft tube (8) of engine (1), measures air inlet CO
2value; Third channel (4), is connected with surveying work ambient atmosphere, surveying work ambient atmosphere CO
2value; Circuit board (6), gathers measuring-signal; The industrial computer (7) being connected with circuit board; It is characterized in that, also comprise:
Enter and be connected in series successively between instrument at draft tube and second channel: vacuum pump (10), throttling valve (11).
2. wide pressure limit EGR measuring system according to claim 1, is characterized in that, also comprises: the first stop valve (13) between second channel one-way throttle valve and instrument; Second stop valve (14) of second channel exhaust ports, the pressure gauge (12) between one-way throttle valve and the first stop valve.
3. according to wide pressure limit EGR measuring system described in claim 1 or 2, it is characterized in that, described vacuum pump is diaphragm type vacuum pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320895751.5U CN203658049U (en) | 2013-12-31 | 2013-12-31 | Wide pressure scope EGR measuring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320895751.5U CN203658049U (en) | 2013-12-31 | 2013-12-31 | Wide pressure scope EGR measuring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203658049U true CN203658049U (en) | 2014-06-18 |
Family
ID=50924426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320895751.5U Expired - Fee Related CN203658049U (en) | 2013-12-31 | 2013-12-31 | Wide pressure scope EGR measuring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203658049U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103728139A (en) * | 2013-12-31 | 2014-04-16 | 天津大学 | Wide-pressure-range EGR measurement system |
| CN113551912A (en) * | 2021-04-28 | 2021-10-26 | 浙江和夏科技股份有限公司 | Engine EGR exhaust gas circulation test system |
-
2013
- 2013-12-31 CN CN201320895751.5U patent/CN203658049U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103728139A (en) * | 2013-12-31 | 2014-04-16 | 天津大学 | Wide-pressure-range EGR measurement system |
| CN103728139B (en) * | 2013-12-31 | 2016-02-10 | 天津大学 | Wide pressure limit EGR measuring system |
| CN113551912A (en) * | 2021-04-28 | 2021-10-26 | 浙江和夏科技股份有限公司 | Engine EGR exhaust gas circulation test system |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140618 Termination date: 20161231 |