CN111322182A - Flow guide pipe structure of engine air inlet system - Google Patents
Flow guide pipe structure of engine air inlet system Download PDFInfo
- Publication number
- CN111322182A CN111322182A CN202010243804.XA CN202010243804A CN111322182A CN 111322182 A CN111322182 A CN 111322182A CN 202010243804 A CN202010243804 A CN 202010243804A CN 111322182 A CN111322182 A CN 111322182A
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- China
- Prior art keywords
- air inlet
- pipe
- engine
- connecting pipe
- inlet connecting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002912 waste gas Substances 0.000 claims abstract description 19
- 210000002445 nipple Anatomy 0.000 claims description 3
- 239000007789 gas Substances 0.000 abstract description 16
- 238000001514 detection method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000009413 insulation Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10242—Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
- F02M35/10262—Flow guides, obstructions, deflectors or the like
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10091—Air intakes; Induction systems characterised by details of intake ducts: shapes; connections; arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10209—Fluid connections to the air intake system; their arrangement of pipes, valves or the like
- F02M35/10222—Exhaust gas recirculation [EGR]; Positive crankcase ventilation [PCV]; Additional air admission, lubricant or fuel vapour admission
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10373—Sensors for intake systems
- F02M35/1038—Sensors for intake systems for temperature or pressure
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Exhaust-Gas Circulating Devices (AREA)
Abstract
The invention discloses a flow guide pipe structure of an engine air inlet system, relates to the technical field of engine exhaust and air inlet systems, and solves the technical problem that the air inlet temperature is not detected accurately due to the fact that the air inlet system in the prior art is not compact in arrangement. The air inlet throttle valve is characterized by comprising an air inlet connecting pipe, wherein one end of the air inlet connecting pipe is connected with an air inlet throttle valve, and the other end of the air inlet connecting pipe is connected with an air inlet pipe of an engine; the air inlet connecting pipe is provided with a connector communicated with the EGR assembly, and a guide pipe for guiding waste gas to an engine air inlet pipe is arranged in the air inlet connecting pipe corresponding to the connector; and a second joint for installing an air inlet temperature sensor is arranged on the air inlet connecting pipe between the connector and the air inlet throttle valve. The invention has reasonable structure and compact arrangement, reduces the difficulty of arrangement, and also effectively reduces the risk of exhaust gas backwash caused by the direct impact of airflow on the pipe wall, so that the measured intake temperature value is more accurate.
Description
Technical Field
The invention relates to the technical field of engine exhaust and intake systems, in particular to a flow guide pipe structure of an engine intake system.
Background
When the engine works, air and fuel are fed into the cylinder to be combusted, so that energy is released and converted into mechanical energy. The temperature, quantity and concentration of the gas fed into the cylinder all have great influence on combustion, which directly influences various indexes of the engine.
An intake pipe communicated with the outside air sends fresh air to an engine intake pipe communicated with the engine through an intake throttle valve, and before the air reaches the engine intake pipe, the intake temperature is monitored, and then the exhaust gas of the EGR assembly is mixed through a three-way joint. For the check of the intake air temperature, the closer the intake air temperature sensor for detecting the air temperature is to the engine intake pipe, the more accurate the measured value is.
However, because the temperature of the waste gas is higher than that of the air, when the waste gas enters the air inlet pipe through the three-way joint, the waste gas directly impacts the pipe wall, and the air temperature is influenced by the back flushing. If the intake air temperature sensor is disposed at a position closer to the engine intake pipe, the exhaust gas has a large influence on the accuracy of detection. At present, in order to avoid the influence of exhaust gas on the detection of the intake air temperature, a sufficient length is reserved between the intake air temperature sensor and the three-way joint so as to avoid the influence of high-temperature exhaust gas on the intake air temperature sensor. Therefore, the length of the existing air inlet connecting pipe is long, the existing requirement on compactness of engine arrangement cannot be met, and the difficulty of arrangement on the engine is high.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art, and provides a guide pipe structure of an air inlet system of an engine, which is compact in arrangement and small in detection influence on air inlet temperature.
The technical scheme of the invention is as follows: a flow guide pipe structure of an engine air inlet system comprises an air inlet connecting pipe, wherein one end of the air inlet connecting pipe is connected with an air inlet throttle valve, and the other end of the air inlet connecting pipe is connected with an engine air inlet pipe; the air inlet connecting pipe is provided with a connector communicated with the EGR assembly, and a guide pipe for guiding waste gas to an engine air inlet pipe is arranged in the air inlet connecting pipe corresponding to the connector; and a second joint for installing an air inlet temperature sensor is arranged on the air inlet connecting pipe between the connector and the air inlet throttle valve.
The port of the flow guide pipe is an inclined cut inclined towards one side of the engine air inlet connecting pipe.
Furthermore, the inclined direction of the inclined notch forms an included angle of 30-60 degrees with the horizontal plane.
Further, the second joint is disposed adjacent to one side of the draft tube.
Further, the axis of the second joint is arranged to intersect the axis of the first joint.
Further, the air inlet connecting pipe is a bent connecting pipe.
Furthermore, the included angle between the two ends of the air inlet connecting pipe is 20-45 degrees.
Advantageous effects
The invention has the advantages that:
1. the intake temperature sensor and the EGR component are sequentially integrated on the intake connecting pipe along the intake direction, so that the requirement of compact arrangement of the engine is met, and the difficulty of arrangement is reduced. And direct guide flow of exhaust gas that will EGR subassembly discharges to the engine intake pipe through a honeycomb duct reduces the air current and directly hits the pipe wall and leads to the risk of waste gas backwash to can arrange the temperature sensor that admits air in the place that is closer apart from the engine intake pipe, measured admission temperature numerical value is more accurate, is good to the control of engine, lets indexes such as its economic performance of better realization of engine.
2. Establish the port of honeycomb duct into the scarf for in waste gas more effectual entering into the engine air inlet pipe, more effectual reduced the air current directly hit the pipe wall and lead to the risk of waste gas backwash, further improvement the degree of accuracy that detects the intake air temperature.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic sectional view of a connection portion of an air inlet connection pipe and a draft tube according to the present invention;
FIG. 3 is a schematic structural view of an intake nipple of the present invention;
fig. 4 is a schematic structural view of the draft tube of the present invention.
Wherein: the system comprises an EGR component 1, an engine air inlet pipe 2, an air inlet throttle 3, an air inlet connecting pipe 4, a guide pipe 5, a first connector 6, a second connector 7, an inclined notch 8 and a connector 9.
Detailed Description
The invention is further described below with reference to examples, but not to be construed as being limited thereto, and any number of modifications which can be made by anyone within the scope of the claims are also within the scope of the claims.
Referring to fig. 1-4, the engine intake system flow guide pipe structure of the present invention includes an intake connection pipe 4. One end of the air inlet connecting pipe 4 is connected with the air inlet throttle valve 3, and the other end is connected with the air inlet pipe 2 of the engine. The air inlet connecting pipe 4 is provided with a connector 9 communicated with the EGR component 1, and a guide pipe 5 for guiding the waste gas to the air inlet pipe 2 of the engine is arranged in the air inlet connecting pipe 4 corresponding to the connector 9. Specifically, the connector 9 and the flow guide pipe 5 are of an integrated structure. And a second joint 7 for mounting an intake temperature sensor is arranged on the intake connecting pipe 4 between the connecting head 9 and the intake throttle valve 3. Specifically, the second joint 7 is arranged adjacent to the connecting joint 9. The temperature sensor that admits air pastes connector 9 promptly, and the effectual temperature sensor that has avoided having influenced the problem that detects the precision because of admitting air arranges to get far away from engine intake pipe 2.
The intake temperature sensor and the EGR component 1 are sequentially integrated on the intake connecting pipe 4 along the intake direction, so that the requirement of compact arrangement of the engine is met, and the difficulty of arrangement is reduced. And directly guide the exhaust gas that EGR subassembly 1 discharged to engine intake pipe 2 through a honeycomb duct 5, reduce the air current and directly hit the pipe wall and lead to the risk of exhaust gas backwash to can arrange the temperature sensor that admits air in the place that is closer apart from the engine intake pipe, measured admission temperature numerical value is more accurate, and is good to the control of engine, lets indexes such as its economic performance of better realization of engine.
Specifically, be equipped with the first joint 6 of slope on the takeover 4 admits air, connector 9 is installed on first joint 6, and the port of honeycomb duct 5 has realized the direct flow direction of exhaust gas to engine intake pipe 2 effectual backwash phenomenon of having avoided waste gas towards the direction of admitting air of engine intake pipe 2.
Preferably, the port of the draft tube 5 is an inclined cut 8 inclined towards one side of the engine air inlet connecting tube 2, so that waste gas can more effectively enter the engine air inlet tube 2, and the risk of waste gas backwash caused by direct impact of air flow on the tube wall is more effectively reduced.
The inclined direction of the inclined notch 8 forms an included angle of 30-60 degrees with the horizontal plane. The larger the included angle between the inclined angle of the inclined notch 8 and the horizontal plane is, the larger the air outlet area is, the smaller the impact of the waste gas on the pipe wall of the air inlet connecting pipe 4 is, and the risk of the waste gas backflushing caused by the fact that the gas flow directly hits the pipe wall is favorably reduced. However, if the angle of inclination of the oblique cut 8 is too large, the pressure at the outlet of the flow guide pipe 5 tends to become insufficient, and it becomes difficult to form an air flow directly flowing to the engine intake pipe 2, and the exhaust gas at this time tends to directly impact the pipe wall. In the embodiment, the inclined angle of the inclined notch 8 is set between 30 degrees and 60 degrees, so that the risk of the exhaust gas backflushing caused by the fact that the airflow directly hits the pipe wall can be effectively reduced.
Preferably, the angle of inclination of the chamfer 8 is 30 ° to the horizontal.
The second joint 7 is arranged close to one side of the draft tube 5. Specifically, the communication port of the air inlet connecting pipe 4 is positioned behind the draft tube 5. After the exhaust gas enters the air inlet connecting pipe 4, the impact surface of the exhaust gas is mainly the bottom of the air inlet connecting pipe 4, and the backflow phenomenon mainly occurs at the bottom of the air inlet connecting pipe 4, so that the part which is influenced the least by the exhaust gas is positioned behind the flow guide pipe 5. The air inlet temperature sensor is arranged behind the flow guide pipe 5, so that the detection accuracy of the air inlet temperature is improved, and the detected temperature is more reliable.
Preferably, a heat insulation pipe sleeve is arranged in the draft tube 5. Through the heat insulation effect of the heat insulation pipe sleeve, the problem that the temperature of the air inlet temperature sensor is influenced by the fact that the flow guide pipe 5 absorbs the heat of the waste gas to enable the temperature of the air inlet temperature sensor to rise can be avoided, and the reliability of air temperature detection is improved.
The axial lead of the second joint 7 and the axial lead of the first joint 6 are arranged in a crossed manner, so that the second joint 7 and the first joint 6 are mutually deviated, and the phenomenon that the temperature sensor interferes with the flow guide pipe 5 after installation can be effectively avoided.
The air inlet connecting pipe 4 is a bent connecting pipe, and the first joint 6 is arranged at the maximum arc-shaped surface of the air inlet connecting pipe 4. After the air enters the air inlet connecting pipe 4, the flow direction of the air is from bottom to top, so that the waste gas is guided, and the risk that the waste gas impacts the pipe wall is better avoided.
The air inlet throttle valve 3, the engine air inlet pipe 2 and the air inlet connecting pipe 4 are all in flange connection, and the first connector 6 and the guide pipe 5 are also in flange connection, so that the connection between each component and the air inlet connecting pipe 4 is more stable and reliable.
The included angle between the two ends of the air inlet connecting pipe 4 is 20-45 degrees. In order to effectively guide the waste gas, the included angle between the two ends of the air inlet connecting pipe 4 is set to be 20-45 degrees in the embodiment, so that the problem that the guide effect is not obvious due to the fact that the included angle is too small is solved, and the problem that air impacts the pipe wall above the air inlet connecting pipe 4 too much due to the fact that the included angle is too large is also solved.
Preferably, the included angle between the two ends of the air inlet connecting pipe 4 is 30 degrees.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various changes and modifications without departing from the structure of the invention, which will not affect the effect of the invention and the practicability of the patent.
Claims (7)
1. The flow guide pipe structure of the engine air inlet system is characterized by comprising an air inlet connecting pipe (4), wherein one end of the air inlet connecting pipe (4) is connected with an air inlet throttle valve (3), and the other end of the air inlet connecting pipe is connected with an engine air inlet pipe (2); a connector (9) communicated with the EGR assembly (1) is arranged on the air inlet connecting pipe (4), and a guide pipe (5) guiding waste gas to an engine air inlet pipe (2) is arranged in the air inlet connecting pipe (4) corresponding to the connector (9); and a second connector (7) for mounting an air inlet temperature sensor is arranged on the air inlet connecting pipe (4) between the connector (9) and the air inlet throttle valve (3).
2. The engine intake system nozzle structure according to claim 1, wherein the nozzle (5) is provided with an oblique cut (8) inclined toward the engine intake pipe (2).
3. An engine air intake system nozzle structure according to claim 2, wherein the oblique cut (8) is inclined at an angle of 30 ° to 60 ° to the horizontal.
4. An engine air intake system nozzle structure according to claim 1, characterized in that the second joint (7) is arranged near one side of the nozzle (5).
5. An engine intake system nozzle structure according to claim 1 or 4, wherein the axis of the second joint (7) intersects the axis of the first joint (6).
6. An engine air intake system nozzle structure according to any one of claims 1 to 4, characterized in that the air intake nipple (4) is a curved nipple.
7. The engine intake system flow guide pipe structure according to claim 6, wherein the included angle between the two ends of the intake connecting pipe (4) is 20-45 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010243804.XA CN111322182A (en) | 2020-03-31 | 2020-03-31 | Flow guide pipe structure of engine air inlet system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010243804.XA CN111322182A (en) | 2020-03-31 | 2020-03-31 | Flow guide pipe structure of engine air inlet system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111322182A true CN111322182A (en) | 2020-06-23 |
Family
ID=71173633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010243804.XA Pending CN111322182A (en) | 2020-03-31 | 2020-03-31 | Flow guide pipe structure of engine air inlet system |
Country Status (1)
| Country | Link |
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| CN (1) | CN111322182A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204041307U (en) * | 2014-08-26 | 2014-12-24 | 江西五十铃发动机有限公司 | A kind of air inlet tube structure of motor car engine |
| EP3255273A1 (en) * | 2016-06-10 | 2017-12-13 | FCA Italy S.p.A. | Intake manifold unit for an internal combustion engine |
| US20180135479A1 (en) * | 2015-04-27 | 2018-05-17 | Yanmar Co., Ltd. | Engine device |
| CN109707543A (en) * | 2019-02-18 | 2019-05-03 | 安徽华菱汽车有限公司 | A kind of vehicle, gas handling system and its air inlet mixing arrangement |
| CN209586538U (en) * | 2018-11-16 | 2019-11-05 | 广西玉柴机器股份有限公司 | A kind of exhaust gas mixed structure of exhaust gas adapter tube and egr system |
| CN209800134U (en) * | 2019-05-09 | 2019-12-17 | 广西玉柴机器股份有限公司 | Multifunctional air inlet connecting pipe for diesel engine |
| CN211924352U (en) * | 2020-03-31 | 2020-11-13 | 广西玉柴机器股份有限公司 | Flow guide pipe structure of engine air inlet system |
-
2020
- 2020-03-31 CN CN202010243804.XA patent/CN111322182A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204041307U (en) * | 2014-08-26 | 2014-12-24 | 江西五十铃发动机有限公司 | A kind of air inlet tube structure of motor car engine |
| US20180135479A1 (en) * | 2015-04-27 | 2018-05-17 | Yanmar Co., Ltd. | Engine device |
| EP3255273A1 (en) * | 2016-06-10 | 2017-12-13 | FCA Italy S.p.A. | Intake manifold unit for an internal combustion engine |
| CN209586538U (en) * | 2018-11-16 | 2019-11-05 | 广西玉柴机器股份有限公司 | A kind of exhaust gas mixed structure of exhaust gas adapter tube and egr system |
| CN109707543A (en) * | 2019-02-18 | 2019-05-03 | 安徽华菱汽车有限公司 | A kind of vehicle, gas handling system and its air inlet mixing arrangement |
| CN209800134U (en) * | 2019-05-09 | 2019-12-17 | 广西玉柴机器股份有限公司 | Multifunctional air inlet connecting pipe for diesel engine |
| CN211924352U (en) * | 2020-03-31 | 2020-11-13 | 广西玉柴机器股份有限公司 | Flow guide pipe structure of engine air inlet system |
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