CN103321787B - Two-wheeled vehicle secondary air-supplementing valve - Google Patents
Two-wheeled vehicle secondary air-supplementing valve Download PDFInfo
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- CN103321787B CN103321787B CN201210081960.6A CN201210081960A CN103321787B CN 103321787 B CN103321787 B CN 103321787B CN 201210081960 A CN201210081960 A CN 201210081960A CN 103321787 B CN103321787 B CN 103321787B
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Abstract
The invention discloses a kind of two-wheeled vehicle secondary air-supplementing valve, it comprises the valve body being provided with air-inlet cavity, outlet chamber and negative cavity, be respectively arranged with into and out of tracheae and negative tube on air cavity and negative cavity, air-inlet cavity is connected with outlet chamber by communicated cavity, and the joint of communicated cavity and outlet chamber is provided with leaf valve; Also being provided with in described valve body can according to the spool of the negative pressure condition opening and closing suction tude of negative cavity and communicated cavity, spool comprises valve rod and is arranged in the valve block of air-inlet cavity, the first next door between described air-inlet cavity and communicated cavity is provided with for the via hole by valve rod and air, described via hole can be closed by valve block, and described spool is provided with the gas-entered passageway for being communicated with air-inlet cavity and communicated cavity.The present invention, by the setting of spool upper air passage, reduces reflux problem that engine exhaust brings and the valve volume of oil problem that reflux problem is brought; Meanwhile, be also convenient to be walked by volatilization timely with tonifying Qi air-flow based on the liquefaction water in valve body.
Description
Technical field
The present invention relates to a kind of two-wheeled vehicle secondary air-supplementing valve, belong to purifying vehicle exhaust gas technical field specifically.
Background technique
What general domestic two-wheeled vehicle generally adopted is mechanical type Carburetor, and this makes, and the tail gas of Motor Vehicle row is more difficult reaches relevant emission standards, and for this reason, the general secondary air-supplying device that adopts reduces CO, HC, NO
xdeng discharge amount, by secondary air-supplementing valve, ozone is incorporated in engine cylinder head, the negative tube of secondary air-supplementing valve connects with engine charge end, suction tude is connected with air filter or other inlet air filter system, steam outlet pipe connects with the exhaust branch pipe of motor, utilizes the pulsating negative pressure produced during engine exhaust to carry out coming in good time opening or closing inlet, outlet to reach the object of tonifying Qi.The valve body of existing two-wheeled vehicle secondary air-supplementing valve is provided with air-inlet cavity, outlet chamber and negative cavity, air-inlet cavity, outlet chamber and negative cavity are respectively arranged with suction tude, steam outlet pipe and negative tube, be communicated with by communicated cavity between air cavity, the two ends of communicated cavity are respectively by valve block and leaf valve opening and closing, when engine charge end is negative pressure, the valve block in air-inlet cavity is up, and be communicated with suction tude and air-inlet cavity, fresh air leads to outlet chamber by suction tude, air-inlet cavity and communicated cavity and enters in exhaust branch pipe, when engine charge end negative pressure is excessive, valve block continues up and between communicated cavity and air-inlet cavity valve body wall and fits and cut off air-inlet cavity and communicated cavity, to stop to engine exhaust branch pipe tonifying Qi, when vehicle traveling is in non-at the uniform velocity state, air-inlet cavity and communicated cavity or suction tude can cut off by valve block in air-inlet cavity regularly, but the hysteresis quality due to negative cavity responding engine causes valve block start delayed, thus the partition of air-inlet cavity and communicated cavity is postponed, there is phase difference phenomenon, as shown in Figure 1, wherein curve A represents negative pressure, curve B is flow of air supply relative with negative pressure in theory, curve C in reality because of the flow of air supply that the hysteresis quality of valve block start occurs, wherein △ ρ is the phase difference caused, the existence of phase difference makes valve block when cutting off air-inlet cavity and communicated cavity or suction tude and fails to cut off in time, fresh air is made to continue to fill in communicated cavity, this will cause leaf valve (one-way valve) can not close in time because of entering of fresh air at the direct draught of engine exhaust end, leaf valve start sensitivity be affected, simultaneously, the valve body inner product oil problem that the reflux problem brought and adverse current bring is vented because leaf valve can not close at the direct draught of engine exhaust end greater engine of closing in time, also the timely volatilization of the liquefaction water amassed in valve body is unfavorable for.
Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides a kind of two-wheeled vehicle secondary air-supplementing valve, the reflux problem brought when it effectively can improve the sensitivity of leaf valve action in secondary air-supplementing valve, timely closedown leaf valve to reduce engine exhaust, and contribute to the timely volatilization of the liquid gas in valve body.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of two-wheeled vehicle secondary air-supplementing valve, it comprises the valve body being provided with air-inlet cavity, outlet chamber and negative cavity, be respectively arranged with into and out of tracheae and negative tube on air cavity and negative cavity, air-inlet cavity is connected with outlet chamber by communicated cavity, and the joint of communicated cavity and outlet chamber is provided with leaf valve; Also being provided with in described valve body can according to the spool of the negative pressure condition opening and closing suction tude of negative cavity and communicated cavity, spool comprises valve rod and is arranged in the valve block of air-inlet cavity, the first next door between described air-inlet cavity and communicated cavity is provided with for the via hole by valve rod and air, described via hole can be closed by valve block, and described spool is provided with the gas-entered passageway for being communicated with air-inlet cavity and communicated cavity.
As the improvement of technique scheme, described gas-entered passageway is located on valve rod, and the bottom that one end of gas-entered passageway extends to valve rod communicates with air-inlet cavity, and the other end communicates from perforate the sidewall of valve rod with communicated cavity.
As the further improvement of technique scheme, described gas-entered passageway is located on valve block, and gas-entered passageway is positioned at the orthographic projection scope of described via hole on valve block, or has overlapping portion with this via hole orthographic projection.
Preferably, described suction tude, steam outlet pipe and negative tube all form by tubular body with the bowl-shaped hoop being connected to tubular body one end respectively, valve body have three cavitys, and what cavity was opposite with bowl-shaped hoop arranges formation described air-inlet cavity, outlet chamber and negative cavity.
Further, described suction tude passes through the bowl-shaped hoop compression fit of suction tude one end on the inwall of air-inlet cavity.
Further, described valve body is provided with the second next door, and negative cavity and communicated cavity cut off by the second next door, valve rod is bearing on the second next door, one end of valve rod is connected with valve block through behind the first next door, and the other end is connected with the diaphragm arranged in negative cavity through behind the second next door, and valve rod is set with stage clip.
Further, described valve block is set with seal ring, described seal ring has upper sealing lip and the lower seal lip of the upper and lower port of the described air-inlet cavity of sealing.
The invention has the beneficial effects as follows: the present invention is by the setting of spool upper air passage, also can communicate when air-inlet cavity and communicated cavity are cut off by valve block, make valve block can closed communication chamber faster, cause secondary air compensating valve leaf to close in time, thus reduce reflux problem that engine exhaust brings and the valve volume of oil problem that reflux problem is brought; Meanwhile, after air-inlet cavity is communicated with communicated cavity, be also convenient to be walked by volatilization timely with tonifying Qi air-flow based on the liquefaction water in valve body; In addition, being arranged so that of this gas-entered passageway, when communicated cavity air inlet, can increase the gas flow of secondary air-supplementing valve path, thus strengthens the oxygenation efficiency to waste gas, reduces the pollution to air.The present invention is simple and reasonable, and operating procedure is simple.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1 is the phase difference schematic diagram of secondary air-supplementing valve;
Fig. 2 is structural representation of the present invention;
Fig. 3 is the plan view of Fig. 2;
Fig. 4 is the sectional view in D-D cross section in Fig. 3.
Embodiment
With reference to Fig. 1 ~ Fig. 4, a kind of two-wheeled vehicle secondary air-supplementing valve of the present invention, it comprises the valve body 1 being provided with air-inlet cavity 11, outlet chamber 12 and negative cavity 13, be respectively arranged with into and out of tracheae 2,3 and negative tube 4 on air cavity 11,12 and negative cavity 13, be made up of tubular body and the bowl-shaped hoop that is arranged on tubular body one end respectively into and out of tracheae 2,3 and negative tube 4, tubular body and bowl-shaped hoop one-body molded, valve body 1 have three cavitys, what bowl-shaped hoop was opposite with cavity arranged described in formation air-inlet cavity 11, outlet chamber 12 and negative cavity 13, suction tude 2 adopts pressing process compression fit on the inwall of air-inlet cavity 11 by the bowl-shaped hoop being arranged on suction tude 2 one end, also gluing sealing means can be adopted bowl-shaped hoop to be connected to the port of valve body 1 air-inlet cavity 11, suction tude 2 connects air filter or is connected with other inlet air filter system, steam outlet pipe 3 and negative tube 4 are by adopting screw 21 to be fastened on valve body 1 with its bowl-shaped hoop be connected respectively, and steam outlet pipe 3 and negative tube 4 connect engine exhaust branch pipe and engine charge end respectively, air-inlet cavity 11 is connected with outlet chamber 12 by communicated cavity 14, and communicated cavity 14 and the joint of outlet chamber 12 are provided with leaf valve 5, and leaf valve 5 is fixed on valve body 1, also being provided with in described valve body 1 can according to the spool of the negative pressure condition opening and closing suction tude 2 of negative cavity 13 and communicated cavity 14, spool comprises valve rod 6 and is arranged in the valve block 7 of air-inlet cavity 11, described valve body 1 is provided with the first next door 15 and the second next door 16, first next door 15 is for cutting off air-inlet cavity 11 and communicated cavity 14, first next door 15 is provided with for the via hole 151 by valve rod 6 and air, described via hole 151 can be closed by valve block 7, negative cavity 13 and communicated cavity 14 cut off by the second next door 16, valve rod 6 is bearing on the second next door 16, one end of valve rod 6 connects with valve block 7 through behind the first next door 15, the other end of valve rod 6 connects with the diaphragm 8 arranged in negative cavity 13 through behind the second next door 16, valve rod 6 between the second next door 16 and valve block 7 is set with stage clip 9, can be positioned at above valve block 7 at valve rod 6 and locate the lining of installation one for apical grafting stage clip 9, valve rod 6 can be able to move axially under the effect of air pressure according to the negative pressure condition of negative cavity 13, to drive valve block 7 opening and closing suction tude 2 and air-inlet cavity 11, in order to increase the sealability of valve block 7, seal ring 17 can be set with on valve block 7, described seal ring 17 has on the described air-inlet cavity 11 of sealing, the upper sealing lip of lower end mouth and lower seal lip, when the up closed air-inlet cavity 11 of spool, the upper sealing lip of seal ring 17 is sealed into the port of air cavity 11, when spool is descending be sealed into tracheae 2 time, the port of the lower seal lip seal suction tude 2 of seal ring 17, described spool is provided with the gas-entered passageway 10 for being communicated with air-inlet cavity 11 and communicated cavity 14.Described gas-entered passageway 10 can be located on valve rod 6, and the bottom that one end of gas-entered passageway 10 extends to valve rod 6 communicates with air-inlet cavity 11, and the other end communicates from perforate the sidewall of valve rod 6 with communicated cavity 14.In addition, as shown in Figure 4, described gas-entered passageway 10 also can be located on valve block 7, and gas-entered passageway 10 is positioned at the orthographic projection scope of described via hole 151 on valve block 7, or has overlapping portion with this via hole 151 orthographic projection.Certainly, gas-entered passageway 10 can also be arranged on valve block 7 and valve rod 6 simultaneously.
The working principle of two-wheeled vehicle secondary air-supplementing valve of the present invention is such: when the engine operates, inlet end produces negative pressure, now because external atmosphere pressure is large compared with the inlet end pressure of motor, it is up that barometric pressure just can promote valve block 7 actuate valve stem 6, valve block 7 is away from the suction port of suction tude 2, the lower seal lip of seal ring 17 no longer closes suction tude 2, fresh air enters into air-inlet cavity 11, the suction that negative pressure produces diaphragm 8 in negative cavity 13 and the pressure that stage clip 9 pairs of valve blocks 7 produce balance each other, valve block 7 is not against on the port of communicated cavity 14, a fresh air part now in air-inlet cavity 11 enters into outlet chamber 12 by communicated cavity 14, another part to be led in communicated cavity 14 by gas-entered passageway 10 and enters into outlet chamber 12, as shown in Figure 4, arrow in valve body 1 represents the flow direction of secondary air-supplementing valve fresh air when tonifying Qi.
When vehicle traveling is in non-at the uniform velocity state, air-inlet cavity 11 can cut off with communicated cavity 14 or suction tude 2 by valve block 7 in air-inlet cavity 11 regularly, and the setting of gas-entered passageway 10, can make when valve block 7 closed communication chamber 14, air in communicated cavity 14 can be discharged by gas-entered passageway 10, indirectly guide in communicated cavity 14 and form an airflow direction, the air in communicated cavity 14 is reduced the resistance of valve block 7, valve block 7 closed communication chamber 14 can be accelerated; When valve block 7 opens communicated cavity 14, fresh air can enter into communicated cavity 14 in advance from gas-entered passageway 10, as shown in Figure 1, namely the flow of Q1 is increased, reduce the flow of Q2, reduce the delayed of the valve block 7 brought because of the hysteresis quality of negative cavity 13 responding engine, thus reduce the phase difference of valve block 7.
In addition, when outlet chamber 12 tonifying Qi, compared to the structure not arranging gas-entered passageway in conventional art, the setting of gas-entered passageway 10 increases the flow of air supply be added in outlet chamber 12, increase the oxidation to waste gas in motor, improve the discharge of waste gas, reduce the pollution to air.
Simultaneously, in that time of engine exhaust, the hysteresis quality considering because of valve block 7 causes valve block 7 to fail timely closed communication chamber 14 making communicated cavity 14 continue tonifying Qi, cause the actual pressure in communicated cavity 14 higher than theoretical pressure, leaf valve 5 is hindered to close in time, thus the exhaust of motor can enter into communicated cavity 14 by steam outlet pipe 3, the air that the setting of gas-entered passageway 10 is convenient in communicated cavity 14 is discharged in time from gas-entered passageway 10, reduce the impact that in communicated cavity 14, air is closed leaf valve 5, making leaf valve 5 relative to when not arranging gas-entered passageway 10 closes in advance, reduce the flow that engine exhaust enters into communicated cavity 14, thus reduce reflux problem that engine exhaust brings and the valve volume of oil problem that reflux problem is just come, also be convenient to be walked by volatilization timely with tonifying Qi air-flow based on the liquefaction water in valve body.
When the pressure in negative cavity 13 forwards malleation to by negative pressure gradually, negative pressure reduces the suction of diaphragm 8, and valve rod 6 and valve block 7 reset gradually under the effect of stage clip 9, and the lower seal lip being enclosed within valve block 7 after reset closes suction port.
The above, just better embodiment of the present invention, but the present invention is not limited to above-described embodiment, as long as it reaches technique effect of the present invention with any same or similar means, all should fall within protection scope of the present invention.
Claims (7)
1. a two-wheeled vehicle secondary air-supplementing valve, comprise the valve body (1) being provided with air-inlet cavity (11), outlet chamber (12) and negative cavity (13), be respectively arranged with into and out of tracheae (2,3) and negative tube (4) on air cavity (11,12) and negative cavity (13), air-inlet cavity (11) is connected with outlet chamber (12) by communicated cavity (14), and communicated cavity (14) and the joint of outlet chamber (12) are provided with leaf valve (5), also being provided with in described valve body (1) can according to the spool of the negative pressure condition opening and closing suction tude (2) of negative cavity (13) and communicated cavity (14), spool comprises valve rod (6) and is arranged in the valve block (7) of air-inlet cavity (11), the first next door (15) between described air-inlet cavity (11) and communicated cavity (14) is provided with for the via hole (151) by valve rod (6) and air, described via hole can be closed by valve block (7), it is characterized in that: described spool is provided with the gas-entered passageway (10) for being communicated with air-inlet cavity (11) and communicated cavity (14).
2. two-wheeled vehicle secondary air-supplementing valve according to claim 1, it is characterized in that: described gas-entered passageway (10) is located on valve rod (6), the bottom that one end of gas-entered passageway (10) extends to valve rod (6) communicates with air-inlet cavity (11), and the other end communicates from perforate the sidewall of valve rod (6) with communicated cavity (14).
3. two-wheeled vehicle secondary air-supplementing valve according to claim 1, it is characterized in that: described gas-entered passageway (10) is located on valve block (7), gas-entered passageway (10) is positioned at the orthographic projection scope of described via hole (151) on valve block (7), or has overlapping portion with this via hole (151) orthographic projection.
4. the two-wheeled vehicle secondary air-supplementing valve according to any one of claims 1 to 3, it is characterized in that: described suction tude (2), steam outlet pipe (3) and negative tube (4) are all made up of tubular body and the bowl-shaped hoop being connected to tubular body one end respectively, valve body (1) has three cavitys, what cavity was opposite with bowl-shaped hoop arranges the described air-inlet cavity of formation (11), outlet chamber (12) and negative cavity (13).
5. the two-wheeled vehicle secondary air-supplementing valve according to any one of claims 1 to 3, is characterized in that: described suction tude (2) by the bowl-shaped hoop compression fit of suction tude (2) one end on the inwall of air-inlet cavity (11).
6. the two-wheeled vehicle secondary air-supplementing valve according to any one of claims 1 to 3, it is characterized in that: described valve body (1) is provided with the second next door (16), negative cavity (13) and communicated cavity (14) cut off by the second next door (16), valve rod (6) is bearing on the second next door (16), one end of valve rod (6) is connected with valve block (7) afterwards through the first next door (15), the other end is connected with the diaphragm (8) arranged in negative cavity (13) afterwards through the second next door (16), valve rod (6) is set with stage clip (9).
7. the two-wheeled vehicle secondary air-supplementing valve according to any one of claims 1 to 3, it is characterized in that: described valve block (7) is set with seal ring (17), described seal ring (17) has upper sealing lip and the lower seal lip of sealing described air-inlet cavity (11) upper and lower port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210081960.6A CN103321787B (en) | 2012-03-23 | 2012-03-23 | Two-wheeled vehicle secondary air-supplementing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210081960.6A CN103321787B (en) | 2012-03-23 | 2012-03-23 | Two-wheeled vehicle secondary air-supplementing valve |
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| Publication Number | Publication Date |
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| CN103321787A CN103321787A (en) | 2013-09-25 |
| CN103321787B true CN103321787B (en) | 2015-12-09 |
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| CN201210081960.6A Active CN103321787B (en) | 2012-03-23 | 2012-03-23 | Two-wheeled vehicle secondary air-supplementing valve |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2017094A1 (en) * | 1970-04-10 | 1971-10-21 | Volkswagenwerk Ag, 3180 Wolfsburg | Mixture control system for an internal combustion engine with controlled fuel injection |
| CN2254488Y (en) * | 1996-05-08 | 1997-05-21 | 光阳工业股份有限公司 | Secondary air supply device for automotive vehicle |
| CN2620095Y (en) * | 2003-02-27 | 2004-06-09 | 书元机械企业(昆山)有限公司 | Secondary air leading-in device for motorcycle engine |
| CN101487410A (en) * | 2009-02-13 | 2009-07-22 | 重庆隆鑫机车有限公司 | Secondary air compensating valve for motor vehicle |
| CN202165146U (en) * | 2011-05-26 | 2012-03-14 | 王靖 | Secondary gulp valve |
| CN202132089U (en) * | 2011-06-27 | 2012-02-01 | 宁波利凯特环保科技有限公司 | Secondary air compensating valve for motorcycle |
| CN202544977U (en) * | 2012-03-23 | 2012-11-21 | 江门市大长江集团有限公司 | Secondary air control device of motorcycle |
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2012
- 2012-03-23 CN CN201210081960.6A patent/CN103321787B/en active Active
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