CN207554237U - It can accurately measure the pipeline of engine intake airflow - Google Patents
It can accurately measure the pipeline of engine intake airflow Download PDFInfo
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- CN207554237U CN207554237U CN201721303409.6U CN201721303409U CN207554237U CN 207554237 U CN207554237 U CN 207554237U CN 201721303409 U CN201721303409 U CN 201721303409U CN 207554237 U CN207554237 U CN 207554237U
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- pipeline
- engine
- air inlet
- circular arc
- flat tube
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Abstract
The utility model discloses a kind of pipeline that can accurately measure engine intake airflow, structure is：The internal diameter of air inlet pipeline is made of tapered, straight, three pipeline sections of flaring.The arrival end of air inlet pipe is a bit of straight line segment pipe, is then punctured into the smooth connection circular arc segment pipe of the equal circular arc of one section of two radius, which is connected with a flat tube section, and flat tube section extends to the beveled tube of a diameter flaring.Flat tube section is the line segments of air inlet pipeline internal diameter minimum, sensor mounting hole is equipped in the inner wall of the line segments of the minimum, to measure air mass flow.By using the admission line of tapered divergent structure, change in flow of the air in pipeline can be controlled, can accurately measure very much the charge flow rate of engine.According to the accurate data of air inflow, engine electronic control unit can rationally control diesel injection amount, improve the combustion position of engine, effectively improve the performance and emission level of engine.
Description
Technical field
The utility model belongs to Structure of Internal-Combustion Engine technology, and in particular to a kind of pipeline knot of measurable engine intake airflow
Structure.
Background technology
When diesel engine is run, the diesel oil that ejects can completely burned be the key that embody diesel combustion efficiency,
Fuel oil can completely burned depend mainly on into cylinder air capacity and spray diesel oil amount whether ratio suitable and air
It whether uniform is mixed with diesel oil.If the diesel oil amount and AIR Proportional of injection are improper, engine performance and row can be directly contributed
Zoom level reduces.Such as：Burning anoxic, engine meeting smoking of the exhaust, oil consumption raising are caused if fuel oil has sprayed more；If combustion
Oil spurts is few, and excessive air is not used, and can generate a large amount of nitrogen oxides, discharge pollutants and increase, the row of also resulting in
Zoom level declines.With the raising that emission level requires, the requirement to air inlet is also higher and higher, is discharged to meet state six
Level needs accurately to control air inflow, and the electronic control unit (ECU) of engine rationally controls bavin according to the number of air inflow
Oil spurts amount can effectively improve engine performance and emission level, so the accurate measurement of engine charge pipeline data on flows
It is very important.
Invention content
It is an object of the present invention to provide a kind of pipeline structures of measurable engine intake airflow, pass through channel interior knot
The improvement of structure, can accurately measure air input of engine by air, so as to which the ECU for making engine accurately controls distributive value, improve engine
Performance and discharge.
To realize that this purpose the technical solution used in the present invention is：The internal diameter of air inlet pipeline is by tapered, straight, flaring three
A pipeline section is formed.The arrival end of air inlet pipe is a bit of straight line segment pipe, is then punctured into the equal circular arc light of one section of two radius
Sliding connection circular arc segment pipe, the circular arc segment pipe are connected with a flat tube section, and flat tube section extends to a diameter gradually
The beveled tube of expansion.Flat tube section is the line segments of air inlet pipeline internal diameter minimum, is equipped in the inner wall of the line segments of the minimum
Sensor mounting hole, to measure air mass flow.
The structure of the air inlet pipeline belongs to Rafael nozzle structure in the gas flowing of Engineering Thermodynamics, also referred to as tapered
Divergent nozzle structure.Its main feature is that：Air fluid in pipeline be always be depressured speedup process, and by control pipeline into
The pressure ratio of outlet can obtain ideal flow value.Flat tube section is the pipeline of internal diameter minimum in pipeline, and setting herein is surveyed
Pressure point can accurately measure the peak flow values of the pipeline, and the flow value is constant.The utility model and prior art
The main distinction that compares is that traditional engine flow measurement is mounted in the equal pipeline of diameter, the change in flow in pipeline
It is larger to measure air flow error for unobvious.
The advantageous effect of the characteristics of the utility model and generation is：It, can by using the admission line of tapered divergent structure
To control change in flow of the air in pipeline, the charge flow rate of engine can be accurately measured very much.According to air inflow
Accurate data, engine electronic control unit (ECU) can rationally control diesel injection amount, improve the combustion position of engine, have
Effect improves the performance and emission level of engine.
Description of the drawings
The principle and structure diagram of Fig. 1 the utility model.
Specific embodiment
Below in conjunction with attached drawing and pass through embodiment the structure of the utility model is described further.
The pipeline of engine intake airflow is can accurately measure, structure is：The internal diameter of air inlet pipeline is by tapered, straight, gradually
Expand three pipeline sections to form.The arrival end of air inlet pipe is a bit of straight line segment pipe 1, is then punctured into the equal circle of one section of two radius
The connection circular arc segment pipe 2 that arc light is slided, the circular arc segment pipe are connected with a flat tube section 3, and flat tube section extends to one
The beveled tube 5 of diameter flaring.Flat tube section is the line segments of air inlet pipeline internal diameter minimum, in the line segments of the minimum
Wall is equipped with sensor mounting hole 4, to measure air mass flow.
As embodiment：The length L1 of a bit of straight line segment pipe of air inlet pipe arrival end is 5mm, and internal diameter diameter D1 is
73mm.The smooth connection circular arc segment pipe of the equal circular arc of two radiuses, circular arc R are smoothly connected for 22mm, two sections of arc lengths
L2 is 30mm.The internal diameter D2 of flat tube section is 50mm, and length L3 is 26mm.The beveled tube exit inside diameter D3 of diameter flaring is
60mm, beveled tube length L4 are 89mm.
The a bit of straight line segment pipe of air inlet pipe arrival end is used to install with other pipelines, conical surface tube outlet and engine
Air inlet pipe linking installation.
The utility model is discharged in state six and is used on engine, can accurately be measured the charge flow rate of air, be passed through calculating
Diesel injection amount can be rationally controlled, ensures that engine reaches better performance and emission level.
Claims (2)
1. the pipeline of engine intake airflow is can accurately measure, it is characterized in that：The internal diameter of air inlet pipeline is by tapered, straight, flaring
Three pipeline sections are formed, and the arrival end of air inlet pipe is a bit of straight line segment pipe (1), is then punctured into the equal circle of one section of two radius
The connection circular arc segment pipe (2) that arc light is slided, the circular arc segment pipe are connected with a flat tube section (3), the extension of flat tube section
For the beveled tube (5) of a diameter flaring, flat tube section is the line segments of air inlet pipeline internal diameter minimum, in the pipeline of the minimum
The inner wall of section is equipped with sensor mounting hole (4), to measure air mass flow.
2. the pipeline described in accordance with the claim 1 that can accurately measure engine intake airflow, it is characterized in that：The air inlet pipe enters
The length L1 of a bit of straight line segment pipe in mouth end is 5mm, and internal diameter diameter D1 is 73mm；The equal circular arc of described two radiuses is smooth
Circular arc segment pipe is connected, circular arc R is smoothly connected for 22mm, and two sections of arc length L2 are 30mm；The flat tube section it is interior
Diameter D2 is 50mm, and length L3 is 26mm；The beveled tube exit inside diameter D3 of the diameter flaring is 60mm, beveled tube length L4
For 89mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721303409.6U CN207554237U (en) | 2017-10-11 | 2017-10-11 | It can accurately measure the pipeline of engine intake airflow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721303409.6U CN207554237U (en) | 2017-10-11 | 2017-10-11 | It can accurately measure the pipeline of engine intake airflow |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207554237U true CN207554237U (en) | 2018-06-29 |
Family
ID=62675562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721303409.6U Active CN207554237U (en) | 2017-10-11 | 2017-10-11 | It can accurately measure the pipeline of engine intake airflow |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207554237U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107725232A (en) * | 2017-10-11 | 2018-02-23 | 东风朝阳朝柴动力有限公司 | It can accurately measure the pipeline of engine intake airflow |
-
2017
- 2017-10-11 CN CN201721303409.6U patent/CN207554237U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107725232A (en) * | 2017-10-11 | 2018-02-23 | 东风朝阳朝柴动力有限公司 | It can accurately measure the pipeline of engine intake airflow |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Pipe capable of measuring air intake flow of engine precisely Effective date of registration: 20190612 Granted publication date: 20180629 Pledgee: Lingyuan steel enterprise limited liability company Pledgor: Dongfeng Chaoyang Chaochai Power Co., Ltd. Registration number: 2019210000021 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |