CN113027645A - Variable cross-section air inlet duct - Google Patents
Variable cross-section air inlet duct Download PDFInfo
- Publication number
- CN113027645A CN113027645A CN202110377795.8A CN202110377795A CN113027645A CN 113027645 A CN113027645 A CN 113027645A CN 202110377795 A CN202110377795 A CN 202110377795A CN 113027645 A CN113027645 A CN 113027645A
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- movable support
- section
- power device
- variable
- deformable soft
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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
- F02M35/10295—Damping means, e.g. tranquillising chamber to dampen air oscillations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K13/00—Arrangement in connection with combustion air intake or gas exhaust of propulsion units
- B60K13/02—Arrangement in connection with combustion air intake or gas exhaust of propulsion units concerning intake
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Silencers (AREA)
Abstract
The invention provides an air inlet pipeline with a variable cross section and a noise elimination function. The variable cross-section air inlet pipeline comprises a main pipeline, a power device and a framework, wherein the power device is fixed on the framework, the framework is connected to the main pipeline, the main pipeline comprises a main body hard pipe, a deformable soft part and a movable support, the end part of the deformable soft part is connected with the main body hard pipe, and the deformable soft part is connected with the movable support; the rotating shaft of the power device is connected with the movable support, and the rotation of the rotating shaft of the power device drives the movable support to move up and down. The invention can control the size of the inner diameter section of the pipeline through the power device according to the flow requirements of different engine rotating speeds under the condition of not increasing other noise elimination devices and special spaces, can solve the problem of large noise of an air intake system to the maximum extent, and has the advantages of simple structure, low manufacturing cost, easy installation, high controllability and easy batch production. The invention is suitable for being mounted on various vehicles.
Description
Technical Field
The invention relates to a silencing technology of an air inlet system of a fuel engine, in particular to a silencing variable cross-section air inlet pipeline of the fuel engine.
Background
When the fuel engine works, high-speed airflow enters the cylinder through the air filter, the air inlet pipe and the air valve, and strong aerodynamic noise is generated in the airflow flowing process, sometimes about 5dB higher than the noise of the engine, and becomes a main noise source second only to exhaust noise. This noise is intensified as the engine speed increases, irrespective of the load variations, and mainly comprises: periodic pressure pulsation noise, vortex noise, helmholtz resonance noise of the cylinder, and air column resonance noise of the intake pipe. The control strategy of the intake noise mainly adopts reasonable design and selects an air filter. The intake duct is rationally designed, theoretically, the longer the duct is, the smaller the pipe diameter is, the better the noise elimination effect of the intake system is, but the duct is long, the pipe diameter is small, the intake resistance can also be increased, and the engine power is influenced.
At present, when an air inlet system of a fuel engine is designed and manufactured, the length and the pipe diameter of a pipeline are fixed, and the design of the pipeline at the moment can meet the air inlet requirement of the engine when the engine works under the rated flow. However, in daily use of all automobiles, the engines are in a medium-low rotating speed state, the air inlet flow of the engines is far smaller than the rated flow when the whole automobile is designed, the diameter of a pipeline in an air inlet system is far larger than the flow requirement of a test, and meanwhile, the noise problem is relatively prominent when the engines are in the medium-low rotating speed state. In order to ensure the noise level of the whole vehicle in running and ensure that the noise of the engine at all rotating speeds is at the level acceptable by drivers, designers need to add various noise elimination devices, such as noise elimination materials, noise elimination resonance systems and the like, in an air intake system, although the noise level can finally reach the requirement, a lot of cost is additionally added, particularly, the helmholtz noise eliminator and the multi-hole noise elimination designed for medium-low frequency noise elimination are additionally added, and parts are additionally added and precious cabin arrangement space is also occupied.
Disclosure of Invention
The invention aims to solve the technical problem of providing an air inlet pipeline with a variable cross section and a noise elimination function.
The technical scheme adopted by the invention for solving the technical problem is as follows: the variable cross-section air inlet pipeline comprises a main pipeline, a power device and a framework, wherein the power device is fixed on the framework, the framework is connected to the main pipeline, the main pipeline comprises a main body hard pipe, a deformable soft part and a movable support, the end part of the deformable soft part is connected with the main body hard pipe, and the deformable soft part is connected with the movable support; the rotating shaft of the power device is connected with the movable support, and the rotation of the rotating shaft of the power device drives the movable support to move up and down.
Further, the movable support moves up and down to enable the deformable soft part to change the size of the section of the air inlet pipeline through the shape change of the deformable soft part. The section change of the air inlet pipeline is changed in real time according to the rotating speed of the engine and is continuously changed. The main control computer ECU of the automobile inputs an electric signal to the power device according to the rotating speed of the engine and controls the rotation of a rotating shaft of the power device.
Furthermore, the end part of the deformable soft part is connected with the main body hard tube through injection molding and encapsulation or welding, and the deformable soft part is connected with the movable support through injection molding and encapsulation or welding. The length of the deformable soft part is 3-5 times of the pipe diameter of the main pipeline, and the deformable soft part is attached to the inner wall surface of the main body hard pipe in the maximum section state.
Furthermore, a rotating shaft of the power device is connected with a threaded insert on the movable support.
Furthermore, the movable support is of a flat hollow structure, and the hollow part of the movable support is convenient for the rotating shaft of the power device to move up and down. The movable support is provided with a left guide post and a right guide post, and the two guide posts penetrate through the framework and are parallel to the central line of a rotating shaft of the power device.
Further, the skeleton is matched with a cut-out block on the main body hard tube in shape.
The invention has the beneficial effects that: under the condition that other noise elimination devices and special spaces are not increased, the problem of large noise of an air intake system can be solved to the maximum extent by controlling the size of the inner diameter section of the pipeline through the power device according to the flow requirements of different engine rotating speeds, and the silencer has the advantages of simple structure, low manufacturing cost, easiness in installation, high controllability and easiness in batch production. The invention is suitable for being mounted on various vehicles.
Drawings
FIG. 1 is a front view of the air intake duct of the present invention.
Fig. 2 is a top view of fig. 1.
Fig. 3 is a perspective view of the air intake duct of the present invention.
Fig. 4 is an exploded schematic view of the air intake duct of the present invention.
Fig. 5 is a schematic cross-sectional view of the intake duct of the present invention in an initial state.
FIG. 6 is a schematic cross-sectional view of an intake manifold of the present invention having a larger cross-section as engine intake air flow increases.
FIG. 7 is a schematic cross-sectional view of the intake manifold of the present invention as it would appear after the engine reaches rated flow and the cross-section of the intake manifold is maximized.
Detailed Description
As shown in fig. 1-4, the variable cross-section intake duct of the fuel engine of the present invention comprises a main duct 4, a power unit 1 and a framework 2, wherein the main duct 4 comprises a main body hard tube 5, a deformable soft part 6 and a movable support 7, the power unit 1 is fixed on the framework 2 by riveting or bolt form, the framework 2 is connected to the main duct 4 by riveting or bolt form, a rotating shaft of the power unit 1 is processed into a thread form and is connected with a thread insert 3 on the movable support 7 of the main duct 4 in the assembling process, the thread insert 3 is fixedly connected on the movable support 7, an automobile main control computer ECU inputs an electric signal to the power unit 1 according to the rotating speed of the engine, and drives the thread insert 3 on the movable support 7 to move up and down on the rotating shaft of the power unit 1 by controlling the rotation of the rotating shaft of the, thereby driving the movable support 7 to move up and down, and in the process that the movable support 7 of the main pipeline 4 moves up and down, the deformable soft part 6 of the main pipeline 4 changes the section size of the air inlet pipeline through the shape change of the deformable soft part.
The section of the air inlet pipeline is changed into continuous change, and the size of the section of the pipeline is changed in real time according to the rotating speed of the engine. The end of the deformable soft part 6 is connected with the main body hard tube 5 by injection molding and encapsulation or welding, and the deformable soft part 6 and the movable support 7 are also connected together by injection molding and encapsulation or welding; the length of the flexible part 6 is preferably 3-5 times of the pipe diameter of the main pipe 4, and the flexible part 6 is attached to the inner wall surface of the main hard pipe 5 in the maximum cross section state.
The movable support 7 is connected with a rotating shaft of the power device with threads through the threaded insert 3, so that the movable support 7 can move up and down. The movable support 7 is a flat hollow structure, the hollow part 9 of the movable support 7 is convenient for the up-and-down movement of the rotating shaft of the power device 1, and the movable support 7 is used as a main movable structure with a variable section and needs to have certain supporting strength. The movable support 7 is preferably provided with a left guide post 8 and a right guide post 8, the center lines of the guide posts are parallel to the center line of the rotating shaft of the power device 1, and the two guide posts 8 penetrate through the framework 2 to help the movable support 7 to smoothly move up and down along the center line of the rotating shaft of the power device 1. The power device 1 may adopt a stepping motor.
The variable-section air inlet pipeline comprises a main air pipe 4 with the pipe diameter capable of being changed at will, a power device 1 for providing pipe diameter change for the main air pipe 4 and a framework 2 for supporting the power device, wherein the framework 2 is just matched with a block dug out of a main body hard pipe 5 in shape, so that the framework 2 also has a dustproof effect.
When the automobile idling control device works, when an automobile is not started or is in an idling state, as shown in fig. 5, the variable cross-section part of the main pipeline 4 is in a pipeline cross-section minimum state, the movable support 7 is in a lowest position in the main pipeline, at the moment, the resistance of an air inlet system meets the air inlet requirement of an engine in an idling operation state, the flow requirement is small, the cross section area of the pipeline is also minimum, and the noise of an air inlet of the engine is in an optimal level; with the gradual increase of the rotating speed of the automobile engine, as shown in fig. 6, under the action of an automobile main control computer ECU control system, a specific electric signal is input to the power device 1 according to the engine rotating speed ECU, a rotating shaft of the power device 1 rotates to drive the threaded insert 3 to move towards one side (upward) of the power device 1, the threaded insert 3 drives the main pipeline movable support 7 to move towards one side (upward) of the power device 1, the main pipeline deformable soft part 6 can change in shape along with the movement of the movable support 7, at the moment, the inner diameter sectional area of the main pipeline gradually increases to meet the air intake flow demand of the engine at a specific rotating speed, at the moment, the inner diameter sectional area of the pipeline is in an optimal state, and the noise of an; with the rotating speed of the automobile engine reaching the rated working condition, as shown in fig. 7, under the action of an automobile main control computer ECU control system, a specific electric signal is input to the power device 1 according to the engine rotating speed, a rotating shaft of the power device 1 rotates to drive the threaded insert 3 to move towards one side (upward) of the power device 1 to reach a limit position, the threaded insert 3 drives the main pipeline movable support 7 to move towards one side (upward) of the power device 1 to the limit position, the main pipeline deformable soft portion 6 changes in shape along with the movement of the movable support 7, at the moment, the inner diameter sectional area of the main pipeline is the largest, the requirement of the engine on the intake flow under the rated rotating speed is met, at the moment, the inner diameter sectional area of the pipeline is in the designed largest state, the intake.
The main control computer ECU controls the rotation of the rotating shaft of the power device 1, thereby controlling the concave and convex of the deformable soft part of the main pipeline and adjusting the section change of the inner air channel of the air inlet pipeline at the section. When the engine is operating at low speed, the intake air flow demand is low, and the larger intake duct brings higher engine noise. The power device 1 changes the diameter of the section of the pipeline at any time according to the rotating speed of the engine, and adjusts the section of the air inlet pipeline to be optimal while meeting the air inlet flow of the engine through the optimal diameter ratio of the pipeline, so that the noise of an air inlet can be controlled to be optimal. Along with the increase of the rotating speed of the engine, the section of the air inlet pipeline is gradually enlarged, and the requirement of large flow of air inlet of the engine is met.
Claims (10)
1. The variable-section air inlet pipeline is characterized by comprising a main pipeline (4), a power device (1) and a framework (2), wherein the power device (1) is fixed on the framework (2), the framework (2) is connected to the main pipeline (4), the main pipeline (4) comprises a main body hard pipe (5), a deformable soft part (6) and a movable support (7), the end part of the deformable soft part (6) is connected with the main body hard pipe (5), and the deformable soft part (6) is connected with the movable support (7); the rotating shaft of the power device (1) is connected with the movable support (7), and the rotation of the rotating shaft of the power device (1) drives the movable support (7) to move up and down.
2. The variable-section air intake duct according to claim 1, characterized in that the movable support (7) moves up and down to change the size of the section of the air intake duct by changing the shape of the deformable soft portion (6).
3. The variable-section intake duct according to claim 2, characterized in that the change in the section of the intake duct is changed in real time and continuously according to the engine speed.
4. The variable-section intake duct according to claim 1, wherein the vehicle main control computer ECU inputs an electric signal to the power unit (1) according to the engine speed and controls the rotation of the rotating shaft of the power unit (1).
5. The intake duct of variable section according to claim 1, characterized in that the end of the deformable soft portion (6) is connected to the main body rigid pipe (5) by injection molding or welding, and the deformable soft portion (6) is connected to the movable support (7) by injection molding or welding.
6. The intake duct with variable cross-section according to claim 1, characterized in that the length of the deformable soft portion (6) is 3-5 times of the pipe diameter of the main duct (4), and the deformable soft portion (6) is attached to the inner wall surface of the main body rigid pipe (5) in the maximum cross-section state.
7. Variable-section air inlet duct according to claim 1, characterized in that the axis of rotation of the power means (1) is connected to a threaded insert (3) on the movable support (7).
8. Variable-section air intake duct according to claim 1, characterized in that the movable support (7) is of a flat hollow structure, the hollow part (9) of the movable support (7) facilitating the up-and-down movement of the rotation axis of the power unit (1).
9. The intake duct with variable cross-section according to claim 1, characterized in that two guide posts (8) are arranged on the movable support (7), the two guide posts (8) pass through the framework (2) and the center line of the guide posts (8) is parallel to the center line of the rotation shaft of the power device (1).
10. A variable-section air inlet duct according to claim 1, characterized in that the skeleton (2) matches the shape of a cut-out in the main body pipe (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110377795.8A CN113027645A (en) | 2021-04-08 | 2021-04-08 | Variable cross-section air inlet duct |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110377795.8A CN113027645A (en) | 2021-04-08 | 2021-04-08 | Variable cross-section air inlet duct |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113027645A true CN113027645A (en) | 2021-06-25 |
Family
ID=76454322
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110377795.8A Pending CN113027645A (en) | 2021-04-08 | 2021-04-08 | Variable cross-section air inlet duct |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113027645A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2146854A1 (en) * | 1970-10-13 | 1972-04-20 | Autemobiles Peugeot, Paris; Regie Nationale des Usines Renault, Billancourt; (Frankreich) | Nozzle with variable flow cross-section and use of this nozzle in a device for recirculating exhaust gas in an internal combustion engine |
| US6269806B1 (en) * | 1996-11-28 | 2001-08-07 | Centro Richerche Tecnologiche S.R.L. | Intake and exhaust device with multiple sections of specific geometry, for internal combustion engines |
| JP2004278403A (en) * | 2003-03-14 | 2004-10-07 | Inoac Corp | Sectional area variable structure of air intake duct |
| CN1800619A (en) * | 2005-12-15 | 2006-07-12 | 东风南充汽车有限公司 | Supercharging engine with gas as single fuel |
| CN102434337A (en) * | 2011-09-28 | 2012-05-02 | 奇瑞汽车股份有限公司 | Resonance silencer with dynamically adjusted silencing frequency |
| CN207500018U (en) * | 2017-07-19 | 2018-06-15 | 北京汽车股份有限公司 | Automobile air inlet system combination silencing apparatus, automobile air inlet system and automobile |
| CN208532218U (en) * | 2018-07-16 | 2019-02-22 | 广州市托恒能源科技有限公司 | It is a kind of without pressure Oil gun with automatic cutoff device |
| CN112282923A (en) * | 2020-11-12 | 2021-01-29 | 湖南路捷道夫涡轮增压系统有限公司 | Variable cross section worm wheel supercharger |
-
2021
- 2021-04-08 CN CN202110377795.8A patent/CN113027645A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2146854A1 (en) * | 1970-10-13 | 1972-04-20 | Autemobiles Peugeot, Paris; Regie Nationale des Usines Renault, Billancourt; (Frankreich) | Nozzle with variable flow cross-section and use of this nozzle in a device for recirculating exhaust gas in an internal combustion engine |
| US6269806B1 (en) * | 1996-11-28 | 2001-08-07 | Centro Richerche Tecnologiche S.R.L. | Intake and exhaust device with multiple sections of specific geometry, for internal combustion engines |
| JP2004278403A (en) * | 2003-03-14 | 2004-10-07 | Inoac Corp | Sectional area variable structure of air intake duct |
| CN1800619A (en) * | 2005-12-15 | 2006-07-12 | 东风南充汽车有限公司 | Supercharging engine with gas as single fuel |
| CN102434337A (en) * | 2011-09-28 | 2012-05-02 | 奇瑞汽车股份有限公司 | Resonance silencer with dynamically adjusted silencing frequency |
| CN207500018U (en) * | 2017-07-19 | 2018-06-15 | 北京汽车股份有限公司 | Automobile air inlet system combination silencing apparatus, automobile air inlet system and automobile |
| CN208532218U (en) * | 2018-07-16 | 2019-02-22 | 广州市托恒能源科技有限公司 | It is a kind of without pressure Oil gun with automatic cutoff device |
| CN112282923A (en) * | 2020-11-12 | 2021-01-29 | 湖南路捷道夫涡轮增压系统有限公司 | Variable cross section worm wheel supercharger |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210625 |
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| RJ01 | Rejection of invention patent application after publication |