CN100387824C - Silencing filter suitable for non-supercharging internal combustion engine air inlet system - Google Patents
Silencing filter suitable for non-supercharging internal combustion engine air inlet system Download PDFInfo
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- CN100387824C CN100387824C CNB2006100178832A CN200610017883A CN100387824C CN 100387824 C CN100387824 C CN 100387824C CN B2006100178832 A CNB2006100178832 A CN B2006100178832A CN 200610017883 A CN200610017883 A CN 200610017883A CN 100387824 C CN100387824 C CN 100387824C
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- internal combustion
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Abstract
The present invention relates to a silencing filter which is suitable for air inlet systems of non-supercharging internal combustion engines. The present invention is characterized in that the present invention comprises a closed shell which is divided into cavities A, B by an upper and a lower separator plates; an emulating Y-shaped pipe is arranged in the cavity A, and through holes are uniformly distributed on the pipe wall at the center of the emulating Y-shaped pipe; a cylindrical filter is arranged in the cavity B; a discharge silencing pipe is arranged at the center of the cylindrical filter, the upper end is closed and is fixed to the lower separator plate, and the lower end extends outside the closed shell and is connected with an opening of an air inlet pipe of an internal combustion engine; through holes are uniformly distributed on the wall of the discharge silencing pipe. An air passage is arranged between the cavity A and the cavity B; a drainage pipe is arranged at the bottom of the cavity B, and the other end of the drainage pipe is led into a tail pipe of an exhaust silencer. The present invention has the advantages of small air inlet resistance, thorough air inlet, wear reduction and long service life; pure air can be provided for internal combustion engines; filtered dust and impurities can be carried out when engine exhaust gas is exhausted; the use, the maintenance and the filter core replacement period can be extended, and the air inlet noise can be effectively eliminated.
Description
Technical field
The present invention relates to the filtrating equipment of induction system of internal combustion engine, particularly a kind of silencer-filter that is applicable to non-supercharging internal combustion engine air inlet system.
Background technique
The gas handling system of China's internal-combustion engine all is equipped with air-strainer at present, and it mainly plays the filtration of air.Work as internal combustion engine, during IO Intake Valve Opens, produce a pressure pulse in suction tude, along with piston continues motion, it is subjected to damping very soon.When IC Intake Valve Closes, produce the pressure pulse of a certain time equally.Like this, just produced periodic induction noise.Its main frequency composition is: f=kni/60 τ H
zIn the formula: n-internal-combustion engine rotational speed, r min; The i-cylinder number; τ-number of stroke, four-stroke τ=2, two-stroke τ=1; The k-overtone order, k=1,2,3.......In addition, the continuous high-frequency noise in a kind of broadband that produces because high velocity air when the valve seat, produces a large amount of eddy current, its crest frequency is: f=β v/dH
zIn the formula: β-Si Tuolahaer number, when Re≤3.3 * 10
5The time, β=0.2～0.27.The airspeed in air inlet cross section, V-valve place, m/s.D-intake valve diameter, m.The stack of above-mentioned two kinds of noises promptly forms induction noise, and induction noise is to be only second to internal combustion engine exhaust noise, one of main noise source of fan noise.And have significantly low, an intermediate frequency characteristics.And at present, for Motor Vehicle, only pay attention to the exhaust sound control of motor mostly, for induction noise less relevance then.At present, be installed in the air-strainer (structure as shown in Figure 1) in the gas handling system, only can play filtered air, dust-tight purpose.Can in air intake filter, add the concern that silencer has caused relevant Professional visitors.
Summary of the invention
Purpose of the present invention is just at above-mentioned existing situation and collection noise elimination, filtration and the self-cleaning property of special development are the silencer-filter that is applicable to non-supercharging internal combustion engine air inlet system of one.
The objective of the invention is to realize: the silencer-filter that originally is applicable to non-supercharging internal combustion engine air inlet system by following scheme, it comprises the enclosing housing that is divided into cavity A, B by dividing plate, in the A chamber, be provided with imitative Y-tube, should constitute by two air intake branches and middle hush tube by imitative Y-tube, middle hush tube lower end closed is fixed on the dividing plate, two air intake branches extend to outside the enclosing housing, be evenly equipped with some open-works on the tube wall in imitative Y-tube center portion, and the area sum of each open-work is greater than the section area of middle hush tube; In the B chamber, be provided with cylindrical filter, discharge hush tube and be arranged on the cylindrical filter center, its upper end closed is fixed on the dividing plate, its lower end extends to outside the enclosing housing and the air-intake of combustion engine mouth of pipe joins, be arranged on the tube wall of discharge hush tube pipeline section in B chamber and be evenly equipped with some open-works, and the area sum of each open-work is greater than the section area of discharging hush tube; A chamber and be provided with air vent between the B chamber in the cylindrical filter outside is provided with drain pipe in the bottom, B chamber that is positioned at the cylindrical filter outside, and the other end of drain pipe feeds in the exhaust silencer tail pipe.
In the present invention, hush tube in the middle of two air intake branches all converge at by gradually big tapering transition pipe, and air intake branch and middle hush tube are 90 °.A chamber height is greater than B chamber height, so that its noise elimination effect is better.
Be located at the A chamber and the air vent between the B chamber in the cylindrical filter outside is the breathing pipe that is fixed on the dividing plate.The quantity of breathing pipe is at least two, is symmetrical distribution.
In the present invention, the cross section of enclosing housing can be round structure, also can be other shape.Cylindrical filter adopts the papery filter core, and is with low cost, needn't maintain, and periodic replacement gets final product.
Housing is made removable, is convenient to safeguard, changes and installs.
Working principle of the present invention is: internal combustion engine, when intake stroke, because piston is moved to lower dead center by top dead center, intake valve is opened, and the cylinder internal volume increases, produce degree of vacuum, air is entered by two air intake branches under action of pressure, and hush tube in the middle of coming together in, and aperture ejection on arm and the middle hush tube, in the A chamber, expand, buffering, slow down.The breathing pipe (hole) that air communication is crossed on the dividing plate enters expansion in the B chamber, slows down; Gas in the B chamber enters from the outside of papery filter core, flows into the inboard of filter core after filtering, and aperture enters in the discharge hush tube on the hush tube through discharging again, leads to internal combustion engine intake valve thus and enters in the cylinder.Because the air that enters is through several times change air current flow direction and deceleration, dust, impurity is separated precipitates, pass through the filtration of papery filter core again, thereby making the air that enters in the cylinder of internal-combustion engine is pure air, reduce the wearing and tearing of internal-combustion engines crank-connecting rod mechanism, prolong the working life of motor.
When waste gas when the exhaust silencer tail pipe is discharged because air current flow, making has degree of vacuum in the tail pipe, under action of pressure, the dust impurity that is deposited in the air intake filter is sucked by drain pipe and enters in the atmosphere with waste gas.Therefore, this device has self-cleaning property, can prolong maintaining and cycle of renew cartridge more.
Because during internal combustion engine, intake valve opens and closes the eddy current crack that pulse pneumatic produced was low, mid-frequency noise and air communication produce when crossing valve seat caused, will reach in the atmosphere by the intake noise reduction filter, so the present invention is provided with noise elimination apparatus in silencer-filter.At first, induction noise is when discharging the aperture of hush tube, because rubbing action, acoustic attenuation coefficient increases, and noise descends, the porous absorption of passing through the papery filter core again, the noise part that descends again.Because A, B chamber are bigger, sound wave inside reflects, and consumes part acoustic energy again, passes through the effect of middle hush tube aperture again, and the variation of two suction tude areas and turn round 90 ° etc. all makes noise further descend.
Adopt the beneficial effect of such scheme to be: the intake noise reduction filter resistance is little, and air inlet is abundant, and can provide pure air to supply the internal-combustion engine needs, reduces wear, and increases the service life; The dust impurity that filters can be taken out of with the discharging of engine exhaust. prolong working service, cycle of renew cartridge more; It is obvious to eliminate the induction noise effect, makes it to meet the GB1495-2002 NBS.The present invention also has simple and reasonable, and use, installation, maintenance be characteristics easily.
Description of drawings
Fig. 1 is traditional air filtering device structure schematic representation.
1 ' be housing, 2 ' be seal washer, 3 ' be filter core, 4 ' be seal washer, 5 ' be discharge tube.
Fig. 2 is a structural representation of the present invention.
Among the figure: 1 is enclosing housing, and 2 is air intake branch, and 3 is middle hush tube, and 4 is air vent, and 5 is filter core, and 6 for discharging hush tube, and 7 is packing ring, and 8 is drain pipe, and 9 is dividing plate.
Embodiment
The present invention will be described further in conjunction with following accompanying drawing, but not limit the present invention.
As shown in Figure 2: the present invention is applicable to the silencer-filter of non-supercharging internal combustion engine air inlet system, it comprises by dividing plate 9 and is divided into cavity A, the cylindrical enclosure body 1 of B, and A chamber height is less than B chamber height, in the A chamber, be provided with imitative Y-tube, should constitute by two air intake branches 2 and middle hush tube 3 by imitative Y-tube, hush tube 3 in the middle of two air intake branches 2 all converge at by gradually big tapering transition pipe, and air intake branch 2 is 90 ° with middle hush tube 3, middle hush tube 3 lower end closed are fixed on the dividing plate 9, two air intake branches 2 extend to outside the enclosing housing 1, be evenly equipped with some open-works on the tube wall in imitative Y-tube center portion, and the area sum of each open-work is greater than the section area of middle hush tube 3; Be provided with cylindrical filter in the B chamber, this filter adopts papery filter core 5, and the filter core upper/lower terminal is by seal washer 7 sealings; Discharge hush tube 6 and be arranged on the cylindrical filter center, its upper end closed is fixed on the dividing plate 9, its lower end extends to outside the enclosing housing 1 and the air-intake of combustion engine mouth of pipe joins, be arranged on the tube wall of discharge hush tube pipeline section in B chamber and be evenly equipped with some open-works, and the area sum of each open-work is greater than the section area of discharging hush tube; A chamber and between the B chamber in the cylindrical filter outside, be provided with air vent 4, this air vent is that two symmetries are fixed on the breathing pipe on the dividing plate 9, be provided with drain pipe 8 in the bottom, B chamber that is positioned at the tubular filter core outside, the other end of drain pipe 8 feeds in the exhaust silencer tail pipe.
Claims (7)
1. silencer-filter that is applicable to non-supercharging internal combustion engine air inlet system, it comprises enclosing housing and the cylindrical filter that is arranged in the housing, it is characterized in that: enclosing housing is separated into A chamber and B chamber by dividing plate (9), in the A chamber, be provided with imitative Y-tube, should constitute by two air intake branches (2) and middle hush tube (3) by imitative Y-tube, middle hush tube (3) lower end closed is fixed on the dividing plate (9), two air intake branches (2) extend to outside the enclosing housing (1), be evenly equipped with open-work on the tube wall in imitative Y-tube center portion, and the area sum of each open-work is greater than the section area of middle hush tube (3); Cylindrical filter is arranged in the B chamber, discharge hush tube (6) and be arranged on the cylindrical filter center, its upper end closed is fixed on the dividing plate (9), its lower end extends to outside the enclosing housing (1) and the air-intake of combustion engine mouth of pipe joins, be arranged on the tube wall of discharge hush tube pipeline section in B chamber and be evenly equipped with open-work, and the area sum of each open-work is greater than the section area of discharging hush tube (6); A chamber and be provided with air vent (4) between the B chamber in the cylindrical filter outside is provided with drain pipe (8) in the bottom, B chamber that is positioned at the cylindrical filter outside, and the other end of drain pipe feeds in the exhaust silencer tail pipe.
2. the silencer-filter that is applicable to non-supercharging internal combustion engine air inlet system according to claim 1 is characterized in that: hush tube (3) in the middle of two air intake branches (2) all converge at by gradually big tapering transition pipe, and air intake branch and middle hush tube are 90 °.
3. the silencer-filter that is applicable to non-supercharging internal combustion engine air inlet system according to claim 1 is characterized in that: A chamber height is greater than B chamber height.
4. the silencer-filter that is applicable to non-supercharging internal combustion engine air inlet system according to claim 1 is characterized in that: be located at A chamber and the air vent (4) between the B chamber in the cylindrical filter outside for being fixed on the breathing pipe on the dividing plate (9).
5. the silencer-filter that is applicable to non-supercharging internal combustion engine air inlet system according to claim 4 is characterized in that: the quantity of breathing pipe is at least two, is symmetrical distribution.
6. the silencer-filter that is applicable to non-supercharging internal combustion engine air inlet system according to claim 1 is characterized in that: the cross section of enclosing housing (1) is a round structure.
7. the silencer-filter that is applicable to non-supercharging internal combustion engine air inlet system according to claim 1 is characterized in that: cylindrical filter adopts papery filter core (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100178832A CN100387824C (en) | 2006-06-02 | 2006-06-02 | Silencing filter suitable for non-supercharging internal combustion engine air inlet system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100178832A CN100387824C (en) | 2006-06-02 | 2006-06-02 | Silencing filter suitable for non-supercharging internal combustion engine air inlet system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1858429A CN1858429A (en) | 2006-11-08 |
| CN100387824C true CN100387824C (en) | 2008-05-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100178832A Expired - Fee Related CN100387824C (en) | 2006-06-02 | 2006-06-02 | Silencing filter suitable for non-supercharging internal combustion engine air inlet system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100387824C (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2238326Y (en) * | 1995-11-20 | 1996-10-23 | 江西赣江机械厂 | Air intake cleaner and silencer for motorcycle |
| US5979598A (en) * | 1996-04-22 | 1999-11-09 | Woco Franz-Josef Wolf & Co. | Intake silencer for motor vehicle |
| JP2001132567A (en) * | 1999-11-02 | 2001-05-15 | Toyo Roki Mfg Co Ltd | Intake device |
| JP2001263185A (en) * | 2000-03-17 | 2001-09-26 | Tennex Corp | Intake silencer of internal combustion engine |
| CN2921340Y (en) * | 2006-06-02 | 2007-07-11 | 河南天瑞环保新材料有限公司 | Noise silencing filter adapted to non-supercharged internal combustion engine air inlet system |
-
2006
- 2006-06-02 CN CNB2006100178832A patent/CN100387824C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2238326Y (en) * | 1995-11-20 | 1996-10-23 | 江西赣江机械厂 | Air intake cleaner and silencer for motorcycle |
| US5979598A (en) * | 1996-04-22 | 1999-11-09 | Woco Franz-Josef Wolf & Co. | Intake silencer for motor vehicle |
| JP2001132567A (en) * | 1999-11-02 | 2001-05-15 | Toyo Roki Mfg Co Ltd | Intake device |
| JP2001263185A (en) * | 2000-03-17 | 2001-09-26 | Tennex Corp | Intake silencer of internal combustion engine |
| CN2921340Y (en) * | 2006-06-02 | 2007-07-11 | 河南天瑞环保新材料有限公司 | Noise silencing filter adapted to non-supercharged internal combustion engine air inlet system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1858429A (en) | 2006-11-08 |
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Granted publication date: 20080514 |