CN201548373U - Exhaust system pressure loss measuring device of automobile engine exhaust system - Google Patents
Exhaust system pressure loss measuring device of automobile engine exhaust system Download PDFInfo
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- CN201548373U CN201548373U CN 200920180019 CN200920180019U CN201548373U CN 201548373 U CN201548373 U CN 201548373U CN 200920180019 CN200920180019 CN 200920180019 CN 200920180019 U CN200920180019 U CN 200920180019U CN 201548373 U CN201548373 U CN 201548373U
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- exhaust system
- pressure loss
- automobile engine
- blower fan
- under test
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Abstract
The utility model provides an exhaust system pressure loss measuring device of an automobile engine exhaust system applied in the field of automobile engines, wherein the exhaust system pressure loss measuring device of the automobile engine comprises a pipeline (1), a fan (2), a stable pressure box (3), a system under test (4) and an inverter(5), wherein the stable pressure box (3) and the inverter(5) are respectively connected with the fan (2), the stable pressure box (3) is connected with the system under test (4), and the fan (2) is communicated with the external. The technical solution avoids the complete dependence to the engine when measuring the pressure loss of an exhaust system, can preliminarily measure the loss pressure of the exhaust system under the situation without the engine, and simultaneously achieves the purpose of reducing the measuring cost, and saving the measuring required time.
Description
Technical field
The utility model relates to the motor car engine field, more particularly, relates to the fields of measurement of the exhaust system pressure loss of automobile engine exhaust system.
Background technology
The exhaust system of automobile mainly is made up of gas outlet, catalysis type clarifier, sound suppressor, tail pipe etc.The pressure loss of exhaust system directly has influence on the performance of engine, therefore will measure the pressure loss of exhaust system.At present, to the most reliable method of measurement of the automobile engine exhaust system pressure loss be on the engine to different operating modes under the pressure loss of exhaust system measure.Be that how to measure mainly be to obtain by stand or car load experiment to the pressure loss of exhaust system in the prior art.During measurement, setting pressure sensor on the position to be measured of exhaust system, can obtain the pressure of relevant position, but the cost height of this measuring method, length consuming time, because when measuring in this way, prerequisite is that engine will be arranged, for the pressure loss that records under the different operating modes need be carried out break-in to engine, to reach desired rotating speed, oil temperature, cooling water temperature etc.And the measuring method that this patent proposed can be carried out under unpowered situation, only need measure system under test (SUT) flow, the pressure loss and temperature at normal temperatures and get final product, therefore, low, the consuming time weak point of cost.
The utility model content
Technical problem to be solved in the utility model is: provide a kind of can the reduction to measure cost, saving measurement required time, and under normal temperature and unpowered situation, the automobile engine exhaust system pressure loss measurement mechanism that can measure the pressure loss of automobile exhaust system.
The utility model is a kind of automobile engine exhaust system pressure loss measurement mechanism, described automobile engine exhaust system pressure loss measurement mechanism comprises pipeline, blower fan, pressurizer tank, system under test (SUT), frequency converter, described pressurizer tank, frequency converter are connected with blower fan respectively, pressurizer tank is connected with system under test (SUT), and described blower fan communicates with the external world.
Described blower fan, pressurizer tank, system under test (SUT) all connects by pipeline between the frequency converter.
Described automobile engine exhaust system pressure loss measurement mechanism also comprises flowmeter, measuring cell, and described flowmeter, measuring cell are connected on the pipeline between pressurizer tank and the system under test (SUT) by pipeline respectively.
Described frequency converter adopts the frequency converter of may command rotation speed of fan.
Described blower fan includes an inlet and an outlet, and the inlet external world of described blower fan communicates, and the outlet of described blower fan is connected with pressurizer tank.
Described measuring cell is arranged on the inlet end of system under test (SUT).
Adopt the technical solution of the utility model, can obtain following beneficial effect:
Adopt the technical solution of the utility model, avoided when the exhaust system pressure loss measured complete dependence to engine, can be under unpowered situation, the pressure loss to exhaust system is carried out preliminary measurement, reach simultaneously to reduce and measure cost, save the purpose of measuring required time.
Description of drawings
Make briefly bright to each width of cloth accompanying drawing of this instructions expressed content and the mark among the figure below:
Fig. 1 is the syndeton synoptic diagram of automobile engine exhaust system pressure loss measurement mechanism described in the utility model;
Be labeled as among the figure: 1, pipeline; 2, blower fan; 3, pressurizer tank; 4, system under test (SUT); 5, frequency converter; 6, flowmeter; 7, measuring cell; 8, ambient atmosphere.
Embodiment
Contrast accompanying drawing below, by description, the effect of the mutual alignment between the shape of embodiment of the present utility model such as related each member, structure, the each several part and annexation, each several part and principle of work etc. are described in further detail example.
As shown in Figure 1, the utility model is a kind of automobile engine exhaust system pressure loss measurement mechanism, described automobile engine exhaust system pressure loss measurement mechanism comprises pipeline 1, blower fan 2, pressurizer tank 3, system under test (SUT) 4, frequency converter 5, described pressurizer tank 3, frequency converter 5 are connected with blower fan 2 respectively, and pressurizer tank 3 is connected with system under test (SUT) 4, and described blower fan 2 communicates with the external world.
Described blower fan 2, pressurizer tank 3, system under test (SUT) 4 all connects by pipeline 1 between the frequency converter 5.
Described automobile engine exhaust system pressure loss measurement mechanism also comprises flowmeter 6, measuring cell 7, and described flowmeter 6, measuring cell 7 are connected on the pipeline 1 between pressurizer tank 3 and the system under test (SUT) 4 by pipeline 1 respectively.
Described frequency converter 5 adopts the frequency converter 5 of may command blower fan 2 rotating speeds.
Described blower fan 2 includes an inlet and an outlet, and the inlet external world of described blower fan communicates, and the outlet of described blower fan 2 is connected with pressurizer tank 3.
Described measuring cell 7 is arranged on the inlet end of system under test (SUT) 4.
The purpose of this utility model is: by frequency converter 5 control blower fans 2 adjust entire measuring device flow (purpose is to adjust the flow of system under test (SUT) 4, but in fact from the blower fan to the system under test (SUT) flow of 4 whole device all will change).
The inlet of described blower fan 2 is communicated with ambient atmosphere 8, and the outlet of blower fan 2 then is connected on the pressurizer tank 3, changes the rotating speed of blower fan 2 by the frequency of adjusting frequency converter 5, thereby realizes changing the flow in the system under test (SUT) 4.Its principle is: the gas communication ability that the change of blower fan 2 rotating speeds can change self makes the pressure change in the pressurizer tank, and the pressure of system under test (SUT) 4 outlets be certain be environmental pressure, pressure differential has determined the flow in the system under test (SUT) 4.
Described pressurizer tank 3 is connected on the system under test (SUT) 4 by pipeline 1, on the pipeline between pressurizer tank 3 and the system under test (SUT) 4, arrange a flowmeter 6 simultaneously, before the porch of system under test (SUT) 4, arrange a measuring cell 7, thereby can measure the flow and the pressure loss of system under test (SUT).
When actual measurement, change the rotating speed of blower fan 2 by the frequency of adjusting frequency converter 5, thereby reach the purpose of Control Flow, measure the flow and the pressure loss that flows through system under test (SUT) by flowmeter 6 and measuring cell 7, can measure the pressure loss of system under test (SUT) under different flow by the frequency of adjusting frequency converter 5 in addition.
The utility model is with the control (blower fan be controlled by frequency converter) of blower fan realization to flow.
The calculation of pressure pressure of measuring with measuring cell in the utility model, the flow and the fluid temperature (F.T.) that need flowmeter to measure simultaneously.Formula rule of thumb can be converted into the measured pressure loss pressure loss of engine exhaust system under different operating modes.Calculation equation is as follows:
In the formula: δ
RgIt is the ratio of gas law constant; δ
T, δ
QmIt is respectively the ratio (ratios of the data that record under the data under the actual condition and the normal temperature) of delivery temperature, mass rate; Δ p is the discharge pressure loss under the actual condition that obtains after converting; Δ p ' is the discharge pressure that records under the normal temperature; p
0It is environmental pressure.
Can determine δ according to the data that record under actual condition and the normal temperature
Rg, δ
Qm, Δ p ', p
0, still can not determine δ
T, therefore from calculation equation, be difficult to solve the discharge pressure Δ p under the engine actual condition, can determine δ according to delivery temperature gradient or empirical value that the client provides usually
T(desirable medial temperature ratio), thereby so the amount of the asking Δ p that waits in the calculation equation can ask.
In addition, be the convenience of solving an equation, the flow that can adjust under the normal temperature makes δ
QmValue about " 1 ", separate in order to obtain high accuracy, the flow that can adjust under the normal temperature makes δ
QmValue exist
About; The gas law constant ratio delta
RgDesirable " 1 ".The unified International System of Units that adopts of each amount in the calculation equation.
In conjunction with the accompanying drawings the utility model has been carried out exemplary description above; obviously the concrete realization of the utility model is not subjected to the restriction of aforesaid way; as long as the various improvement of having adopted method design of the present utility model and technical scheme to carry out; or design of the present utility model and technical scheme are directly applied to other occasions without improving, all in protection domain of the present utility model.
Claims (6)
1. automobile engine exhaust system pressure loss measurement mechanism, it is characterized in that: described automobile engine exhaust system pressure loss measurement mechanism comprises pipeline (1), blower fan (2), pressurizer tank (3), system under test (SUT) (4), frequency converter (5), described pressurizer tank (3), frequency converter (5) are connected with blower fan (2) respectively, pressurizer tank (3) is connected with system under test (SUT) (4), and described blower fan (2) communicates with the external world.
2. according to the described automobile engine exhaust system pressure loss of claim 1 measurement mechanism, it is characterized in that: described blower fan (2), pressurizer tank (3), system under test (SUT) (4) all connects by pipeline (1) between the frequency converter (5).
3. according to claim 1 or 2 described automobile engine exhaust system pressure loss measurement mechanisms, it is characterized in that: described automobile engine exhaust system pressure loss measurement mechanism also comprises flowmeter (6), measuring cell (7), and described flowmeter (6), measuring cell (7) are connected on the pipeline (1) between pressurizer tank (3) and the system under test (SUT) (4) by pipeline (1) respectively.
4. according to the described automobile engine exhaust system pressure loss of claim 1 measurement mechanism, it is characterized in that: described frequency converter (5) adopts the frequency converter (5) of may command blower fan (2) rotating speed.
5. according to claim 1 or 2 described automobile engine exhaust system pressure loss measurement mechanisms, it is characterized in that: described blower fan (2) includes an inlet and an outlet, the inlet external world of described blower fan communicates, and the outlet of described blower fan (2) is connected with pressurizer tank (3).
6. according to the described automobile engine exhaust system pressure loss of claim 3 measurement mechanism, it is characterized in that: described measuring cell (7) is arranged on the inlet end of system under test (SUT) (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920180019 CN201548373U (en) | 2009-10-22 | 2009-10-22 | Exhaust system pressure loss measuring device of automobile engine exhaust system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920180019 CN201548373U (en) | 2009-10-22 | 2009-10-22 | Exhaust system pressure loss measuring device of automobile engine exhaust system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201548373U true CN201548373U (en) | 2010-08-11 |
Family
ID=42603548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200920180019 Expired - Fee Related CN201548373U (en) | 2009-10-22 | 2009-10-22 | Exhaust system pressure loss measuring device of automobile engine exhaust system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201548373U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103091106A (en) * | 2011-10-29 | 2013-05-08 | 重庆车辆检测研究院有限公司 | Motor vehicle exhaust arc arrester test device |
-
2009
- 2009-10-22 CN CN 200920180019 patent/CN201548373U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103091106A (en) * | 2011-10-29 | 2013-05-08 | 重庆车辆检测研究院有限公司 | Motor vehicle exhaust arc arrester test device |
| CN103091106B (en) * | 2011-10-29 | 2015-07-22 | 重庆车辆检测研究院有限公司 | Motor vehicle exhaust arc arrester test device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100811 Termination date: 20121022 |