CN203929160U - A kind of mounting pipe of engine air capacity meter - Google Patents
A kind of mounting pipe of engine air capacity meter Download PDFInfo
- Publication number
- CN203929160U CN203929160U CN201420371382.4U CN201420371382U CN203929160U CN 203929160 U CN203929160 U CN 203929160U CN 201420371382 U CN201420371382 U CN 201420371382U CN 203929160 U CN203929160 U CN 203929160U
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- pipeline section
- mounting pipe
- filter screen
- gas
- air
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Abstract
The mounting pipe that the utility model discloses a kind of engine air capacity meter, mounting pipe comprises: the first pipeline section, one end of the first pipeline section is for being connected with the pneumatic plant entrance of engine supercharger, and the first pipeline section is provided with for the boss of air flowmeter is installed; The second pipeline section, the second pipeline section is removably connected with the other end of the first pipeline section; Filter screen, filter screen is folded between the first pipeline section and the second pipeline section.Employing split-type structural of the present utility model, sandwiched filter screen between the first pipeline section and the second pipeline section, has strengthened the degree of stability of the air-flow in mounting pipe, thereby while making air flowmeter gas-monitoring, obtains more accurately, more stable signal; The second pipeline section adopts throat structure, and gas is compressed through choke timesharing gas, and flow velocity rises, and the turbulence level of gas reduces, thereby obtains more stable air-flow environment, has improved the measuring accuracy of air flowmeter.
Description
Technical field
The utility model relates to engine art, particularly a kind of mounting pipe of engine air capacity meter.
Background technology
The emission control technique of existing a kind of engine is that EGR is controlled (EGR controls) technology, its principle mainly: appropriate waste gas is introduced to cylinder combustion and burns, thus the maximum temperature in reduction cylinder, to reduce NO
xdischarge capacity.If excessive waste gas enters the cylinder of engine, the burn deterioration of engine will be made, so the amount of EGR needs strict control.In prior art, can realize egr system by the mode of closed-loop control, by detecting actual EGR, lead as feedback control signal and control egr system.Being fixed on air flowmeter in mounting pipe can be used for detecting actual EGR and leads.The mounting pipe of prior art is arranged on the measuring positions such as engine block or gas outlet end, mounting pipe is the straight tube of integral type, near on the tube wall of engine, be fixed with air flowmeter, the less stable of air-flow in such structure, it is larger that the testing result of air flowmeter is affected by the turbulent flow of gas, accuracy is low, and the structure of integral type makes inconvenient maintenance.
The information that is disclosed in this background technology part is only intended to increase the understanding to general background of the present utility model, and should not be regarded as admitting or imply that in any form this information structure has been the known prior art of persons skilled in the art.
Utility model content
The purpose of this utility model is to provide a kind of mounting pipe of engine air capacity meter, thereby it is low and keep in repair inconvenient defect to overcome the accuracy of existing mounting pipe.
For achieving the above object, the utility model provides a kind of mounting pipe of engine air capacity meter, mounting pipe comprises: the first pipeline section, and one end of the first pipeline section is for being connected with air flowmeter connector, and the first pipeline section is provided with for the boss of air flowmeter is installed; The second pipeline section, the second pipeline section is removably connected with the other end of the first pipeline section; Filter screen, filter screen is folded between the first pipeline section and the second pipeline section.
Preferably, in technique scheme, mounting pipe also comprises O-ring seal, and O-ring seal is folded between filter screen and the second pipeline section.
Preferably, in technique scheme, the middle part of the second pipeline section is provided with reducing part, and the both sides of reducing part are respectively minor diameter straight-tube portion and major diameter straight-tube portion, and the first pipeline section is removably connected with minor diameter straight-tube portion.
Preferably, in technique scheme, the first pipeline section adopts buckle to be connected with the second pipeline section.
Preferably, in technique scheme, reducing part is 20 °～80 ° with the angle of minor diameter straight-tube portion.
Compared with prior art, the utlity model has following beneficial effect:
Employing split-type structural of the present utility model, sandwiched filter screen between the first pipeline section and the second pipeline section, has strengthened the degree of stability of the air-flow in mounting pipe, thereby while making air flowmeter gas-monitoring, obtains more accurately, more stable signal; The second pipeline section adopts throat structure, and gas is compressed through choke timesharing gas, and flow velocity rises, and the turbulence level of gas reduces, thereby obtains more stable air-flow environment, has improved the measuring accuracy of air flowmeter; The first pipeline section and the second pipeline section adopt the connection of bayonet type, and mounting or dismounting are convenient, manufacture simply, and cost are low.
Accompanying drawing explanation
Fig. 1 is according to the explosive view of the mounting pipe of engine air capacity meter of the present utility model embodiment.
Fig. 2 is the cut-open view of an embodiment of the mounting pipe of engine air capacity meter.
Fig. 3 is the vertical view of Fig. 2.
Fig. 4 is the structural drawing according to filter screen of the present utility model.
Fig. 5 is according to another embodiment of the mounting pipe of engine air capacity meter of the present utility model.
Main description of reference numerals:
1-the first pipeline section, 11-buckle, 12-boss, 2-filter screen, 3-O-ring seal, 4-the second pipeline section, 41-reducing part, 42-draw-in groove, 43-minor diameter straight-tube portion.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail, but is to be understood that protection domain of the present utility model is not subject to the restriction of embodiment.
Unless separately there is other clearly to represent, otherwise in whole instructions and claims, term " comprises " or its conversion was stated being understood to include as " comprising " or " including " etc. element or ingredient, and do not get rid of other element or other ingredient.
As shown in Figure 1, according to the mounting pipe of the engine air capacity meter of the utility model embodiment, be split-type structural, comprise that the first pipeline section 1 and the second pipeline section 4, the first pipeline sections 1 and the second pipeline section 4 removably link together.As an embodiment, as shown in Figure 1, one end of the first pipeline section 1 is provided with a plurality of buckles 11, the inwall of the second pipeline section 4 is provided with the draw-in groove 42 of equal number, during installation, the end of the first pipeline section 1 is placed in the second pipeline section 4, then rotate the first pipeline section 1, buckle 11 is slided along draw-in groove 42, and when buckle 11 and draw-in groove 42 clamping, the first pipeline section 1 is arranged on the second pipeline section 4.
Preferably, as Figure 1-3, the middle part of the second pipeline section 4 is provided with reducing part 41, and the both sides of reducing part 41 are respectively minor diameter straight-tube portion 43 and major diameter straight-tube portion, and the first pipeline section 1 is removably connected with minor diameter straight-tube portion 43.Preferably, reducing part 41 is 20 °～80 ° with the angle of minor diameter straight-tube portion 43.
As Figure 1-3, the first pipeline section 1 is provided with for the other end of boss 12, the first pipeline sections of air flowmeter is installed and is connected with air flowmeter connector.Air flowmeter connector is as the pneumatic plant entrance of engine supercharger, engine block or gas outlet end.As shown in Figure 1-2, sandwiched filter screen 2 and O-ring seal 3 between the first pipeline section 1 and the second pipeline section 4.As shown in Figure 4, filter screen 2 adopts latticed filter structure.As shown in Figure 2, the inwall of the second pipeline section 4 is provided with boss, for holding O-ring seal 3.Preferably, on the inwall of the small end of reducing part 41, be provided with boss.When the first pipeline section 1 is installed on the second pipeline section 4, O-ring seal 3 is pressed on the boss of the second pipeline section 4, and filter screen 2 and O-ring seal 3 compressions, and sealing function is played in the gap between filter screen 2 and the second pipeline section 4, produces the phenomenon of gas leakage while avoiding gas to pass through filter screen 2.
As another embodiment, a plurality of filter screens 2 of sandwiched between the first pipeline section 1 and the second pipeline section 4.As shown in Figure 5, between the first pipeline section 1 and the second pipeline section 4, two filter screens 2 of sandwiched, can play better current stabilization effect.
While using above-mentioned mounting pipe, gas enters from the mouth of pipe of the major diameter straight-tube portion of the second pipeline section 4, after filter screen 2, enter the first pipeline section 1, the air flowmeter that gas is installed on the boss 12 of the first pipeline section 1 is measured, and then by the first pipeline section 1, the pneumatic plant entrance by engine enters cylinder.
Employing split-type structural of the present utility model, sandwiched filter screen between the first pipeline section and the second pipeline section, has strengthened the degree of stability of the air-flow in mounting pipe, thereby while making air flowmeter gas-monitoring, obtains more accurately, more stable signal; The second pipeline section adopts throat structure, and gas is compressed through choke timesharing gas, and flow velocity rises, and the turbulence level of gas reduces, thereby obtains more stable air-flow environment, has improved the measuring accuracy of air flowmeter; The first pipeline section and the second pipeline section adopt the connection of bayonet type, and mounting or dismounting are convenient, manufacture simply, and cost are low.
The aforementioned description to concrete exemplary of the present utility model is for the object with illustration is described.These descriptions not want the utility model to be defined as disclosed precise forms, and obviously, according to above-mentioned instruction, can much change and change.Exemplary embodiment is selected and the object described is to explain certain principles of the present utility model and practical application thereof, thereby made those skilled in the art can realize and utilize various exemplary of the present utility model and various selection and change.Scope of the present utility model is intended to be limited by claims and equivalents thereof.
Claims (5)
1. a mounting pipe for engine air capacity meter, is characterized in that, described mounting pipe comprises:
The first pipeline section, one end of described the first pipeline section is for being connected with air flowmeter connector, and described the first pipeline section is provided with for the boss of air flowmeter is installed;
The second pipeline section, described the second pipeline section is removably connected with the other end of the first pipeline section;
Filter screen, described filter screen is folded between described the first pipeline section and described the second pipeline section.
2. the mounting pipe of engine air capacity meter according to claim 1, is characterized in that, described mounting pipe also comprises O-ring seal, and described O-ring seal is folded between described filter screen and described the second pipeline section.
3. the mounting pipe of engine air capacity meter according to claim 1 and 2, it is characterized in that, the middle part of described the second pipeline section is provided with reducing part, the both sides of described reducing part are respectively minor diameter straight-tube portion and major diameter straight-tube portion, and described the first pipeline section is removably connected with described minor diameter straight-tube portion.
4. the mounting pipe of engine air capacity meter according to claim 1, is characterized in that, described the first pipeline section adopts buckle to be connected with described the second pipeline section.
5. the mounting pipe of engine air capacity meter according to claim 3, is characterized in that, described reducing part is 20 °～80 ° with the angle of described minor diameter straight-tube portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420371382.4U CN203929160U (en) | 2014-07-07 | 2014-07-07 | A kind of mounting pipe of engine air capacity meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420371382.4U CN203929160U (en) | 2014-07-07 | 2014-07-07 | A kind of mounting pipe of engine air capacity meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203929160U true CN203929160U (en) | 2014-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420371382.4U Active CN203929160U (en) | 2014-07-07 | 2014-07-07 | A kind of mounting pipe of engine air capacity meter |
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| Country | Link |
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| CN (1) | CN203929160U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104075768A (en) * | 2014-07-07 | 2014-10-01 | 广西玉柴机器股份有限公司 | Installation tube for air flow meter of engine |
-
2014
- 2014-07-07 CN CN201420371382.4U patent/CN203929160U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104075768A (en) * | 2014-07-07 | 2014-10-01 | 广西玉柴机器股份有限公司 | Installation tube for air flow meter of engine |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |