CN101451459B - Reed valve device, combustion engine and vehicle - Google Patents
Reed valve device, combustion engine and vehicle Download PDFInfo
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- CN101451459B CN101451459B CN200810179756.1A CN200810179756A CN101451459B CN 101451459 B CN101451459 B CN 101451459B CN 200810179756 A CN200810179756 A CN 200810179756A CN 101451459 B CN101451459 B CN 101451459B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
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Abstract
The present invention provides a reed valve device, an internal combustion engine and a vehicle. The reed valve device may efficiently transport secondary air. The internal combustion (500) has a secondary air supply path (520) for supplying air to an air discharge path (510). A plurality of reed valves (102, 103) are configured on the reed valve device (100) in the secondary air supply path (520) in parallel. The reed valves (102, 103) respectively includes valve bases (141), reeds (142, 152) configured in manner of overlapping with the end surface of the valve bases (141), limit stops (143, 153) for limiting deformation of the reed (142, 152). Further, gaps formed between the reeds (142, 152) and the valve bases (141) are different in the reed valves (102, 103) when limiting the deformation of the reed (142, 152) through the limit stops (143, 153).
Description
Technical field
The present invention relates to leaf valve, particularly relate to the leaf valve being disposed in the air fed secondary air supply passage of exhaust pathway of internal-combustion engine.In addition, the internal-combustion engine that has this leaf valve is such as being equipped in the vehicles such as motor bike.
Background technique
Conventionally, the air fed secondary air supply passage of the oriented exhaust pathway of the internal combustion engine configurations of motorcycle-use is as Exhaust gas purifying device.At secondary air supply passage, dispose leaf valve midway.Leaf valve utilizes the exhaust fluctuation pressure that produces in exhaust pathway reed to be opened and carried air during for negative pressure in exhaust pathway side, when exhaust pathway side is malleation, leaf valve cuts out and blocks air.And, be that corresponding exhaust pulsation opens or closes reed, the air of simultaneously exhaust gas purification being used (secondary air) passes out to the device of exhaust pathway.About this leaf valve, the structure that configures side by side two leaf valves on secondary air supply passage is disclosed in No. 3330019 communique of Japan Patent.In addition, with the leaf valve of patent, being characterised in that, is the durability that improves leaf valve, and the insulating unit with vent ability is set in the downstream chamber of reed chamber.
Patent documentation 1: No. 3330019th, Japan Patent
Leaf valve utilizes the exhaust fluctuation pressure producing in exhaust pathway that reed is opened or closed, to supply with to exhaust pathway the secondary air that exhaust gas purification is used.That is, leaf valve utilizes the negative exhaust fluctuation pressure in exhaust pathway that reed is opened, now, secondary air is introduced in exhaust pathway, on the contrary, with respect to the positive exhaust fluctuation pressure in exhaust pathway, instantaneous reed cuts out, prevent that the air in exhaust pathway from entering secondary air supply passage.
But, the rotation speed change of the corresponding motor of speed of the exhaust pulsation producing in exhaust pathway.If the exhaust producing in exhaust pathway pulsation is too fast, leaf valve can following action: in exhaust pathway side, become malleation and before reed cuts out completely, exhaust pathway side becomes negative pressure, again reed is opened.In this situation, reed does not cut out, and the state of opening continuously with reed is identical.Therefore, leaf valve can not pass out to exhaust pathway efficiently by secondary air.From above-mentioned situation, in leaf valve, exist corresponding engine speed secondary air can be delivered to the scope in exhaust pathway efficiently.In addition, although in No. 3330019 communique of Japan Patent, the structure that has configured side by side two leaf valves in secondary air supply passage is disclosed, but still may produce same problem.
Summary of the invention
The invention provides a kind of leaf valve, can improve the problems referred to above of leaf valve, thus feeding secondary air more efficiently.
Reed valve device of the present invention disposes side by side a plurality of leaf valves in housing.A plurality of leaf valves have respectively the stopper of valve seat, the reed configuring in the overlapping mode of the end face with valve seat and the distortion of restriction reed.When limiting reed distortion by stopper, the gap forming between the reed of a plurality of leaf valves and valve seat is different.
In addition, the internal-combustion engine of the present invention's one mode has to the air fed secondary air supply passage of exhaust pathway, in secondary air supply passage, forms and has a plurality of leaf valves side by side.A plurality of leaf valves have respectively the stopper of valve seat, the reed configuring in the overlapping mode of the end face with valve seat and the distortion of restriction reed.And when limiting the distortion of reed by stopper, the gap forming between the reed of a plurality of leaf valves and valve seat is different.
In addition, the internal-combustion engine of another way of the present invention has to the air fed secondary air supply passage of exhaust pathway, and secondary air supply passage disposes the path with leaf valve side by side.Leaf valve in the path of configuration has respectively the stopper of valve seat, the reed configuring in the overlapping mode of the end face with valve seat and the distortion of restriction reed side by side.And while limiting the distortion of reed by stopper, the gap forming between reed and valve seat of the leaf valve in the path of configuration is different side by side.
In reed valve device of the present invention and internal-combustion engine, when opening the distortion of restriction reed, the gap that forms between the reed of a plurality of leaf valves and valve seat is different.In closing valve events, the little leaf valve in gap easily cuts out earlier, if this leaf valve cuts out, fluctuation pressure just acts on other leaf valve.Therefore,, if a leaf valve cuts out, other leaf valves also easily cut out thereupon earlier.Like this, the different a plurality of leaf valves in above-mentioned gap collaborate, thereby can increase efficiently the delivery volume of secondary air.
Accompanying drawing explanation
Fig. 1 means the figure of the internal-combustion engine of the reed valve device with an embodiment of the present invention;
Fig. 2 means the profile of the reed valve device of an embodiment of the present invention;
Fig. 3 means the sectional drawing of the reed valve device of an embodiment of the present invention;
Fig. 4 means the profile of one of shape of the stopper of leaf valve in the reed valve device of an embodiment of the present invention example;
Fig. 5 means the profile of one of shape of the stopper of leaf valve in the reed valve device of an embodiment of the present invention example;
Fig. 6 means the figure of the embodiment of reed valve device and the relation of the speed of a motor vehicle in comparative example and secondary air flow of an embodiment of the present invention;
Fig. 7 means the figure of the internal-combustion engine of other mode of execution of the present invention.
Embodiment
Below, with reference to the accompanying drawings of the reed valve device of an embodiment of the present invention.In each accompanying drawing, to realizing parts or the position mark same numeral of same function.In addition, the invention is not restricted to following mode of execution.
As shown in Figure 1, reed valve device 100 is configured in the secondary air supply passage 520 of internal-combustion engine 500.Secondary air supply passage 520 is the air fed paths of exhaust pathway 510 to internal-combustion engine 500, and it is disposed at introduces atmosphere and by between the air-strainer of its purification 530 and exhaust pathway 510.On exhaust pathway 510, dispose catalyzer 511,512, secondary air supply passage 520 is connected in the downstream side of catalyzer 511.In addition, in this mode of execution, on exhaust pathway 510, configured separate has a plurality of (in the example shown in Fig. 1 being 2) catalyzer 511,512.And, between the catalyzer 511,512 of configured separate, be connected with secondary air supply passage 520.In addition, secondary air supply passage 520 is connected in than the center of the catalyzer of configured separate 511,512 and more partially leans on the position of the upstream side of exhaust pathway 510.
In detail, in this mode of execution, the exhaust pathway 510 of internal-combustion engine 500 is disposed in silencing apparatus 540.Above-mentioned catalyzer 511,512 is disposed on the upstream side of the exhaust pathway 510 in silencing apparatus 540 and the position being separated from each other in downstream side.In this mode of execution, the first catalyzer 511 of upstream side is that second catalyzer 512 in downstream side is by the oxidation catalyst of the off-gas oxidizing of internal-combustion engine 500 by the reducing catalyst of the waste gas reduction of internal-combustion engine 500.Secondary air supply passage 520 from introduce atmosphere and by the air-strainer of its purification 530 to exhaust pathway 510 feeding secondary airs.In this mode of execution, secondary air supply passage 520 is connected in than the center of the first catalyzer 511 of the exhaust pathway 510 in silencing apparatus 540 and the second catalyzer 512 and more partially leans on the position of the upstream side of exhaust pathway 510.In Fig. 1, label 550 is fuel supplying device (Carburetor or oil sprayer), and it is disposed at from air-strainer 530 to the air fed air inlet of internal-combustion engine 500 path 560.
In this mode of execution, as shown in Figure 2, housing 101 is by may be partitioned into the upstream side of secondary air supply passage 520 and the pair of shells in downstream side 111,112 forms.The housing 111 of upstream side and the housing 112 in downstream side have respectively joint 121,131 and the base portion 122,132 being connected on secondary air supply passage 520.The housing 111 of upstream side and the housing 112 in downstream side make respectively its joint 121,131 toward the outer side and base portion 122,132 are aimed at, and with screw 123, connect.Leaf valve 102,103 is configured in the position of aiming at this base portion 122,132.In this mode of execution, at the base portion 132 of the housing 112 in downstream side, be formed with step 133.As shown in Figures 2 and 3, two leaf valves 102,103 are sandwiched between the end face of base portion 122 of this step 133 and upstream side housing 111 to embed the state of this step 133 and configuration side by side.
Secondly, two leaf valves 102,103 have valve seat 141, reed 142,152 and stopper 143,153.
In this mode of execution, valve seat 141 is plate-shaped member, is be embedded in the step 133 of housing 101 and will in housing 101, be separated into the parts in upstream side and downstream side.On valve seat 141, be formed with two openings 144,154, the surrounding of opening 144,154 be formed with reed 142,152 against end face.In addition, in this mode of execution, a plurality of (in this mode of execution being 2) opening is set on a valve seat, and configures reed in each opening, but the mode of valve seat is not limited to this.For example, also can different valve seats be set to each reed, and on each valve seat, form opening and configure reed.
Reed 142,152 consists of sheetmetal, overlapping with the downstream side end face of valve seat 141, overlays on the opening 144,154 of valve seat 141.One end of reed 142,152 is fixed on valve seat 141, and the other end of reed 142,152 is free end.In this mode of execution, two leaf valves 102,103 use materials, width, length, thickness is identical and eigentone is roughly the same reed 142,152.Stopper 143,153 is the parts of restriction reed 142,152 distortion.In this mode of execution, stopper 143,153 is plate-shaped member, and it is disposed at the downstream side of reed 142,152.Stopper 143,153, reed 142,152 are fixed on valve seat 141 by screw 161 respectively.
As shown in Figure 2, reed 142,152 end faces along valve seat 141 extend, and free end 142a, the 152a of reed 142,152 is separated with stopper 143,153.When exhaust pathway 510 1 sides are malleation, reed 142,152 is by being pressed on the end face of valve seat 141, and leaf valve 102,103 is closed.When exhaust pathway 510 1 sides are negative pressure, free end 142a, the 152a of reed 142,152 are separated with the end face of valve seat 141.When free end 142a, the 152a of reed 142,152 is separated with valve seat 141, between reed 142,152 and valve seat 141, form the gap of secondary air circulation.The distortion of opening valve events of such reed 142,152 is limited in the amount of deformation of regulation by reed 142,152 and stopper 143,153 butts.In detail, the face butt of the upstream side of reed 142,152 and stopper 143,153, with restrained deformation.
When the distortion by stopper 143,153 restriction reeds 142,152, the gap being formed between reed 142,152 and valve seat 141 of two leaf valves 102,103 is different.In this mode of execution, the shape of the stopper 143,153 of two leaf valves 102,103 is different.
In this mode of execution, as shown in Figure 4, the stopper 143 of the first leaf valve 102 has following shape: valve seat 142 is separated gradually with the end face of valve seat 141 towards the free end 142a of reed 142 side from being fixed on the position of valve seat 141.This first leaf valve 102 forms following shape: when by stopper 143 restriction reed 142 distortion, reed 142 is along the facial disfigurement of the upstream side of stopper 143, separated gradually towards the free end 142a of reed 142 and the end face of valve seat 141 from the position being fixed on valve seat 141.
On the other hand, the stopper 153 of the second leaf valve 103 as shown in Figure 5, intermediate portion 153a is separated with the end face of valve seat 141,153a compares with intermediate portion, the position 153a relative with the free end 152a of reed 152 approaches the end face of valve seat 141, has intermediate portion 153a side-prominent roughly waveform downstream.In this second leaf valve 103, when the distortion by stopper 153 restriction reeds 152, reed 152 is along stopper 153 distortion, becomes intermediate portion side-prominent waveform downstream.In this second leaf valve 103, when opening valve events, the free end 152a of reed 152 is not separated with the end face of valve seat 141.
Like this, in this mode of execution, the first leaf valve 102 and the second leaf valve 103 are compared, and when the distortion by stopper 143,153 restriction reeds 142,152, free end 142a, the 152a of reed 142,152 distance separated from the end face of valve seat 141 is different.Particularly, in this mode of execution, this distance of the second leaf valve 103 is less than this distance of the first leaf valve 102.
When the distortion by stopper 143,153 restriction reeds 142,152, the gap being formed between reed 142,152 and valve seat 141 of two leaf valves 102,103 is different.In this mode of execution, the free-ended displacement distance of the reed of the second leaf valve 103 is less than the free-ended displacement distance of the reed of the first leaf valve 102.Therefore, closing in valve events of leaf valve 102,103, compare with the first leaf valve 102, the second leaf valve 103 cuts out quickly.
When the second leaf valve 103 cuts out, the pressure (pressure that reed 142 will cut out) that acts on the first leaf valve 102 raises, and after the second leaf valve 103 cuts out, immediately the first leaf valve 102 also cuts out.Thus, the exhaust fluctuation pressure of exhaust pathway 510 acts on the reed 142,152 of leaf valve 102,103 effectively, promptly carries out the valve events that closes of reed 142,152.Thus, in this mode of execution, feeding secondary air efficiently.
Below, based on Fig. 6, to having, by stopper, limit the effect that reed when distortion be formed at the reed valve device of two different leaf valves of gap between reed and valve seat and describe.
Fig. 6 represents the speed of a motor vehicle, the relation by secondary air supply passage 520 to the secondary air flow (with reference to Fig. 1) of exhaust pathway 510 supplies.In addition, the rotating speed that acts on the fluctuation pressure of exhaust on leaf valve 102,103 pulsation and fluctuation velocity and be because of motor causes, but in the embodiment shown in this graph of a relation and comparative example, engine speed is roughly directly proportional to the speed of a motor vehicle.In addition, in the embodiment shown in this graph of a relation and comparative example, at secondary air, supply with in road 520 and configure reed valve device 100 respectively, and configure side by side two leaf valves 102,103 on this reed valve device 100.
First, the curve of the rhombus of blacking (a) is comparative example of the present invention.In this comparative example (a), the stopper of two leaf valves is all identical with the stopper 153 shown in Fig. 5, is to have the intermediate portion 153a waveform stopper of side-prominent shape downstream.And the position 153b of free end 152a distortion of stopper 153 restriction reeds 152 and the distance a of the end face of valve seat 141 are set to 1mm.
In this comparative example (a), two leaf valves 102,103 (with reference to Fig. 3) are all set as 1mm by this apart from a, therefore, both reed 152 to close valve events fast.Therefore, as shown in Figure 6, even particularly in the situation that the speed of exhaust pulsation accelerates, leaf valve 102,103 also easily suitably cuts out, even and if when the speed of a motor vehicle is fast (when engine speed is high), secondary air flow is also many.And, due to two leaf valves 102,103 to close valve events very fast equally, so when the slower low speed driving of fluctuation velocity (when engine speed is slow), the time that leaf valve 102,103 cuts out is too fast, thereby secondary air flow is few.
Secondly, the circular curve (b) of blacking is comparative example of the present invention.This comparative example too, identical with the stopper 153 shown in Fig. 5, and two leaf valves 102,103 all have waveform stopper, and wherein above-mentioned waveform stopper has intermediate portion 153a side-prominent shape downstream.In this comparative example, the position 153b of free end 152a distortion of stopper 153 restriction reeds 152 and the distance a of the end face of valve seat 141 are set to 2mm.
In this comparative example (b), two leaf valves 102,103 are all set as 2mm by this apart from a, therefore, compare with comparative example (a), both reed 152 to close valve events slow.Therefore,, in the speed of a motor vehicle of * 4 degree, the secondary air flow of comparative example (b) is more than the secondary air flow of comparative example (a).But if accelerate to * 5 degree of the speed of a motor vehicle, the secondary air flow of comparative example (b) is less than the secondary air flow of comparative example (a).
Secondly, the square curve (c) of blacking is comparative example of the present invention.In this comparative example (c), as shown in Figure 4, two leaf valves 102,103 all have stopper 143, and wherein stopper 143 has position from reed 142 being fixed on to valve seat 141 towards the free end side of reed 142 and the end face of valve seat 141 separated shape gradually.And the position 143a of free end 142a distortion of restriction reed 142 and the distance b of the end face of valve seat 141 are all set to 4.8mm.
In this comparative example (c), this distance b is greater than this distance b of the leaf valve of comparative example (a), (b), therefore, reed 142 to close valve events slow.Therefore, particularly when the slow low speed driving of fluctuation velocity the secondary air flow of (when engine speed is slow) more than the secondary air flow of comparative example (a), (b).But the secondary air flow while travelling under * 2～* 5 the speed of a motor vehicle is less than the secondary air flow of comparative example (a), (b).
Secondly, the square curve (d) of blacking is embodiments of the invention.In this embodiment (d), while limiting the distortion of reed by stopper, the gap forming between the reed of two leaf valves 102,103 and valve seat is different.In this embodiment, identical with the stopper 153 shown in Fig. 5, the stopper of two leaf valves is all to have the intermediate portion 153a waveform stopper of side-prominent shape downstream.And about the position 153b of free end 152a distortion of stopper 153 restriction reeds 152 and the distance a of the end face of valve seat 141, one of them leaf valve 102 is set to 1mm, another leaf valve 103 is set to 2mm.
That is, embodiment (d) and comparative example (a), (b) are compared, in embodiment (d), this of a leaf valve 102 is 1mm apart from a, and this of another leaf valve 103 is 2mm apart from a.In comparative example (a), this of two leaf valves 102,103 is 1mm apart from a, and in comparative example (b), this of two leaf valves 102,103 is 2mm apart from a.That is,, in embodiment (d), while limiting reed distortion by stopper, the gap forming between the reed of two leaf valves 102,103 and valve seat is different.
In this embodiment (d), by the reed of an above-mentioned leaf valve 102 that is set as 1mm apart from a close valve events than another leaf valve 103 that this is set as to 2mm apart from a reed to close valve events fast.In this embodiment (d), closing in valve events of leaf valve 102,103, the leaf valve 102 in two leaf valves 102,103 first cuts out.And when a leaf valve 102 cuts out, exhaust fluctuation pressure can focus on another leaf valve 103.Therefore, another leaf valve 103 cuts out immediately after a leaf valve 102 cuts out.
In addition, in this embodiment (d), in opening valve events, a leaf valve 102 that above-mentioned distance a is set as to 1mm is also fast than another leaf valve 103 that this is set as to 2mm apart from a.In this embodiment (d), in opening valve events, if will first open apart from a leaf valve 102 that is set as 1mm, exhaust fluctuation pressure can focus on another leaf valve 103.Therefore, another leaf valve 103 is opened immediately after a leaf valve 103 is opened.
In this embodiment (d), as shown in Figure 6, while travelling under than * 2 slow speed of a motor vehicle, compare with comparative example (b), the flow of secondary air increases.Can think due to embodiment (d) open valve events faster than the valve events of opening of comparative example (b), thereby can supply with more secondary air.In addition, in this embodiment (d), in the speed of a motor vehicle, be * 2～* 5 region, compare with comparative example (a), (b), all can supply with equal or more secondary air., in the test data in Fig. 6, in the speed of a motor vehicle, be particularly 0～* 4 region, compare with comparative example (a), (b), all can supply with more secondary air.
In addition, shape of stopper etc. can be adjusted according to the use of vehicle.For example, often travel in the motor bike in urban district etc., have the many speed of a motor vehicle regions of frequency of travelling.This embodiment's (d) reed valve device 100 is such as when the motor bike being applied to often travel in urban district etc., by many speed of a motor vehicle regions of frequency of can corresponding travelling such as this motor bikes, adjust the shape of stopper etc., so that region, the particularly speed of a motor vehicle that the corresponding speed of a motor vehicle is 0～* 5 are * 2～* 5 region.
As shown in this embodiment (d), when limiting the distortion of reed by stopper, the gap being formed between reed and valve seat of two leaf valves is different, in this case, two different leaf valves of above-mentioned gap collaborate, thereby can effectively increase the delivery volume of secondary air.
Above the reed valve device 100 of an embodiment of the present invention is illustrated, as mentioned above, when limiting reed distortion by stopper, the gap being formed between reed and valve seat of two leaf valves is different, in this case, two different leaf valves of above-mentioned gap collaborate, thereby can effectively increase the delivery volume of secondary air.
The quantity of the leaf valve of example is two, but the quantity of leaf valve also can be more than two.That is, this reed valve device, in the situation that having a plurality of leaf valve, when limiting the distortion of reed by stopper, can make the gap between reed and valve seat that is formed at of above-mentioned a plurality of leaf valves.In this situation, in closing valve events, the little leaf valve in gap easily cuts out earlier, if this leaf valve cuts out, fluctuation pressure acts on other leaf valve.Therefore,, if a leaf valve cuts out, another leaf valve also easily cuts out thereupon earlier.Like this, the different a plurality of leaf valves in above-mentioned gap collaborate, thereby can effectively increase the delivery volume of secondary air.Like this, reed valve device 100 also can have plural leaf valve.
In above-described embodiment (d), the shape of the stopper of a plurality of leaf valves is roughly the same, is limiting under the state of reed distortion by stopper, and the free end of the reed distance separated from the end face of valve seat is different.In the present invention, be not limited to this embodiment (d), a plurality of leaf valves also can make the shape of stopper different.For example,, while variform stopper being installed on different leaf valves, such as selecting above-mentioned waveform stopper or there is free end side and the valve seat stopper etc. of separated shape gradually.In this situation, in the situation that it is different to limit the gap being formed between reed and valve seat of reed when distortion two leaf valves by stopper, two different leaf valves of above-mentioned gap collaborate, thereby can effectively increase the delivery volume of secondary air.
In this situation, for example, by stopper, limiting under the state of reed distortion, the free end of the reed of a plurality of leaf valves distance separated from the end face of valve seat can be different.In other words, the distance of the position of the stopper of a plurality of leaf valves restriction reed free end distortion and the end face of valve seat can be different.In closing valve events, the free end of reed when the speed that reed cuts out is out of shape according to restriction reed and the variable in distance of the end face of valve seat.This distance is corresponding with the distance of the position of stopper restriction reed free end distortion and the end face of valve seat.Therefore,, in being disposed at a plurality of leaf valves of reed valve device, by making the distance of the position of stopper restriction reed free end distortion and the end face of valve seat different, two leaf valves collaborate, and can effectively increase the delivery volume of secondary air.
Can make the thickness difference of the reed of a plurality of leaf valves.In addition, the material of each reed also can be different.In the situation that reed being installed on valve seat by screw, the position of installing by this screw also can be different.Thus, in a plurality of leaf valves, also can regulate the spring constant of reed.
Above the reed valve device of an embodiment of the present invention is illustrated, but reed valve device of the present invention is not limited to above-mentioned reed valve device.
Below, the internal-combustion engine of an embodiment of the present invention is described.
As shown in Figure 1, in this mode of execution, internal-combustion engine 500 has to the air fed secondary air supply passage 520 of exhaust pathway 510, on secondary air supply passage 520, forms and has a plurality of leaf valves 102,103 (with reference to Fig. 3) side by side.As shown in Figure 2, a plurality of leaf valves 102,103 have respectively: the stopper 143,153 of valve seat 141, the reed 141,152 configuring in the overlapping mode of the end face with valve seat 141 and 142,152 distortion of restriction reed.And, in above-mentioned a plurality of leaf valves 102,103, also can form as follows: when by stopper 143,153 restriction reed 142,152 distortion, the gap forming between reed 142,152 and valve seat 141 is different.Therefore, internal-combustion engine 500 also can arrange above-mentioned reed valve device 100 in secondary air supply passage 520.
In addition, as shown in Figure 7, secondary air supply passage 520 disposes the path 521,522 with leaf valve 102,103 to the internal-combustion engine of alternate manner side by side.The leaf valve 102,103 of the path 521,522 of configuration has respectively the stopper 143 (with reference to Fig. 2) of valve seat 141, the reed 142 configuring in the overlapping mode of the end face with valve seat 141 and 142 distortion of restriction reed side by side.And in the leaf valve 102,103 of the path 521,522 of configuration, when by stopper 143 restriction reed 142 distortion, the gap forming between reed 142 and valve seat 141 is different side by side.In the manner, similarly, due to the reason identical with above-mentioned reed valve device 100, different two leaf valves 102,103 in this gap collaborate, thereby can effectively increase the delivery volume of secondary air.In example shown in Fig. 7, secondary air supply passage 520 disposes two paths 521,522 with leaf valve 102,103 side by side, but secondary air supply passage 520 also can dispose two paths above with leaf valve side by side.
In addition, also can in the housing being communicated with secondary air supply passage, dividing plate be set, to form two paths, and be respectively arranged with leaf valve in each path.In this case, the mobile mutual noninterference of the air circulating in each leaf valve, each leaf valve suitably collaborates, thereby can effectively increase the delivery volume of secondary air.
In this case, the shape of the stopper of each leaf valve also can be different.By stopper, limiting under the state of reed distortion, the free end of each reed of each leaf valve distance separated from valve seat also can be different.The position of stopper restriction reed free end distortion of each leaf valve and the distance of the end face of valve seat also can be different.The thickness of each reed also can be different.The material of each reed also can be different.In addition, each reed also can be installed on valve seat by screw, and the position of installing by this screw is different.
In this internal-combustion engine, different two leaf valves 102,103 in gap collaborate, thereby can effectively increase the delivery volume of secondary air.Therefore, can be applicable to the internal-combustion engine of the various vehicles such as motor bike and Straddle-type vehicle.
Above the reed valve device of an embodiment of the present invention and internal-combustion engine are illustrated, but reed valve device of the present invention and internal-combustion engine are not limited to above-mentioned reed valve device and internal-combustion engine, can carry out various changes.
Claims (19)
1. a reed valve device, it disposes side by side a plurality of leaf valves in housing,
Described reed valve device is disposed at the air fed secondary air supply passage of exhaust pathway to internal-combustion engine,
Above-mentioned a plurality of leaf valve utilizes the exhaust fluctuation pressure producing in same above-mentioned exhaust pathway that reed is opened or closed,
Described a plurality of leaf valve has respectively valve seat, the reed configuring in the overlapping mode of the end face with described valve seat and limits the stopper of described reed distortion,
When limiting described reed distortion by described stopper, the gap forming between reed and valve seat is different.
2. reed valve device as claimed in claim 1, wherein, the shape of the described stopper of described a plurality of leaf valves is different.
3. reed valve device as claimed in claim 1, wherein, is limiting by described stopper under the state of described reed distortion, and the free end of the described reed of the described a plurality of leaf valves distance separated from the end face of valve seat is different.
4. reed valve device as claimed in claim 1, wherein, it is different with the distance of the end face of described valve seat that the described stopper of described a plurality of leaf valves limits the position of free end distortion of described reed.
5. reed valve device as claimed in claim 1, wherein, the thickness of the described reed of described a plurality of leaf valves is different.
6. reed valve device as claimed in claim 1, wherein, the material of reed is different described in each of described a plurality of leaf valves.
7. reed valve device as claimed in claim 1, wherein, the described reed in described a plurality of leaf valves is installed on described valve seat by screw, and the position of installing by this screw is different.
8. an internal-combustion engine, it has to the air fed secondary air supply passage of exhaust pathway,
In described secondary air supply passage, form and have a plurality of leaf valves side by side,
Above-mentioned a plurality of leaf valve utilizes the exhaust fluctuation pressure producing in same above-mentioned exhaust pathway that reed is opened or closed,
The stopper that described a plurality of leaf valve has respectively valve seat, the reed configuring in the overlapping mode of the end face with described valve seat and limits the distortion of described reed,
When limiting described reed distortion by described stopper, the gap forming between reed and valve seat is different.
9. an internal-combustion engine, it has to the air fed secondary air supply passage of exhaust pathway,
Described secondary air supply passage disposes a plurality of paths respectively with a plurality of leaf valves side by side,
Above-mentioned a plurality of leaf valve utilizes the exhaust fluctuation pressure producing in same above-mentioned exhaust pathway that reed is opened or closed,
A plurality of leaf valves in a plurality of paths of described configuration arranged side by side have respectively valve seat, the reed configuring in the overlapping mode of the end face with described valve seat and limit the stopper of described reed distortion,
When limiting described reed distortion by described stopper, the gap forming between reed and valve seat is different.
10. internal-combustion engine as claimed in claim 8 or 9 wherein, disposes catalyzer in described exhaust pathway, and described secondary air supply passage is connected in the downstream side of described catalyzer.
11. internal-combustion engines as claimed in claim 8 or 9, wherein, in described exhaust pathway, configured separate has a plurality of catalyzer, connects described secondary air supply passage between the catalyzer of described configured separate.
12. internal-combustion engines as claimed in claim 11, wherein, described secondary air supply passage is connected in than the center of the catalyzer of described configured separate more partially on the position by the upstream side of described exhaust pathway.
13. internal-combustion engines as claimed in claim 8 or 9, wherein, described in each, the shape of the described stopper of leaf valve is different.
14. internal-combustion engines as claimed in claim 8 or 9, wherein, are limiting by described stopper under the state of described reed distortion, and described in each, described in each of leaf valve, the free end of the reed distance separated from valve seat is different.
15. internal-combustion engines as claimed in claim 8 or 9, wherein, it is different with the distance of the end face of described valve seat that described in each, the described stopper of leaf valve limits the position of free end distortion of described reed.
16. internal-combustion engines as claimed in claim 8 or 9, wherein, described in each, the thickness of reed is different.
17. internal-combustion engines as claimed in claim 8 or 9, wherein, described in each, the material of reed is different.
18. internal-combustion engines as claimed in claim 8 or 9, wherein, described in each, reed is installed on described valve seat by screw, and the position of installing by this screw is different.
19. 1 kinds of vehicles, it has the internal-combustion engine described in claim 8 or 9.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007312627 | 2007-12-03 | ||
| JP2007-312627 | 2007-12-03 | ||
| JP2007312627A JP2009138534A (en) | 2007-12-03 | 2007-12-03 | Reed valve device, internal combustion engine and vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101451459A CN101451459A (en) | 2009-06-10 |
| CN101451459B true CN101451459B (en) | 2014-03-12 |
Family
ID=40733906
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810179756.1A Expired - Fee Related CN101451459B (en) | 2007-12-03 | 2008-12-03 | Reed valve device, combustion engine and vehicle |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2009138534A (en) |
| CN (1) | CN101451459B (en) |
| TW (1) | TW200925468A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109026257B (en) * | 2018-09-18 | 2024-10-01 | 江苏心源航空科技有限公司 | Variable lift reed valve device |
-
2007
- 2007-12-03 JP JP2007312627A patent/JP2009138534A/en active Pending
-
2008
- 2008-10-06 TW TW097138472A patent/TW200925468A/en not_active IP Right Cessation
- 2008-12-03 CN CN200810179756.1A patent/CN101451459B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2009138534A (en) | 2009-06-25 |
| CN101451459A (en) | 2009-06-10 |
| TWI378200B (en) | 2012-12-01 |
| TW200925468A (en) | 2009-06-16 |
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Granted publication date: 20140312 Termination date: 20211203 |