NL2005304C2 - Exhaust, valve housing, motorized vehicle, and method of mounting. - Google Patents
Exhaust, valve housing, motorized vehicle, and method of mounting. Download PDFInfo
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- NL2005304C2 NL2005304C2 NL2005304A NL2005304A NL2005304C2 NL 2005304 C2 NL2005304 C2 NL 2005304C2 NL 2005304 A NL2005304 A NL 2005304A NL 2005304 A NL2005304 A NL 2005304A NL 2005304 C2 NL2005304 C2 NL 2005304C2
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Description
P92361NL00
Title: Exhaust, valve housing, motorized vehicle, and method of mounting.
The invention relates to an exhaust for an engine of a motorized vehicle, such as a motorcycle or a car, which exhaust comprises a first exhaust tube, a second exhaust tube, and a muffler provided within the first exhaust tube, wherein the muffler and the second exhaust tube define different flow 5 paths for gases that, in use, flow through the exhaust, the exhaust being provided with a butterfly valve being arranged for substantially sealing off the flow path defined by the second exhaust tube and having a valve axle and a valve plate. The invention also relates to a valve housing arranged for use in an exhaust for a motorized vehicle, such as a motorcycle or a car. The 10 invention also relates to a motorized vehicle, such as a motorcycle or a car. The invention further relates to a method of mounting a butterfly valve in an exhaust for a motorized vehicle, such as a motorcycle or a car.
An exhaust of the type that is described above is known from WO 97/40264. Therein an exhaust is described having an outer tube and an inner 15 tube provided within the outer tube. A butterfly valve is provided within the inner tube. A muffler is provided in between the inner and outer tube.
When the butterfly valve is opened, exhaust gasses predominantly flow through the inner pipe. Thus, exhaust gasses may escape relatively easily. As a result, power of an engine of the motorized vehicle is relatively high.
20 Furthermore, a relatively loud undisturbed engine sound can be heard by a user of the motorized vehicle.
When the butterfly valve is closed, exhaust gases predominantly flow through the muffler in between the inner and outer pipe. As a result, the power of the engine is somewhat decreased. Furthermore, the sound of the 25 engine is disturbed and muffled by the muffler.
The known exhaust thus enables the user of the motorized vehicle to switch between a first state wherein a power of the engine is relatively high and a relatively loud and undisturbed sound is produced, and a second state wherein the power of the engine is somewhat decreased and the sound of the 2 engine is disturbed and muffled. Such an exhaust is highly beneficial because advantages of both states can be enjoyed by the user dependent on the circumstances wherein the motorized vehicle is used. For example, on a public road the second state can be used. As another example, on race circuits, closed 5 area’s e.g. dedicated to biker meetings, or other places where the relatively loud sound is allowed, the first state can be used so that the user may enjoy the undisturbed sound of the engine.
The butterfly valve is normally mounted in the following way. First, a hole is provided in the outer tube and the inner tube so that the valve axle 10 can be mounted from outside the exhaust. After the axle is mounted through the hole, the valve plate is brought towards the axle through the inner and/or outer tube. Then, the valve plate is attached to the valve axle, for example by welding or by means of a screw. After mounting the axle projects outside the outer tube so that is can be actuated from the outside.
15 This way of mounting the butterfly valve has been considered convenient for a considerably long time. Such convenience for example follows from the conventional consideration that the projecting valve axle that runs through the inner tube cannot be mounted anymore after it has been attached to the valve plate. However, recently disadvantages of the known way of 20 mounting of the butterfly valve have become apparent. For example, regulations on sound emission by exhausts nowadays contain relatively strict norms, which norms proved to be difficult to reach by means of the known way of mounting. Such disadvantages nowadays threaten the advantages that can be reached by means of the known exhaust.
25 It is therefore an object of the invention to provide an improved exhaust that at least partly meets one or more of the disadvantages of known exhausts.
Accordingly there is provided an exhaust for an engine of a motorized vehicle, such as a motorcycle or a car, which exhaust comprises a 30 first exhaust tube, a second exhaust tube, and a muffler provided within the 3 first exhaust tube, wherein the muffler and the second exhaust tube define different flow paths for gases that, in use, flow through the exhaust, the exhaust being provided with a butterfly valve being arranged for substantially sealing off the flow path defined by the second exhaust tube and having a 5 valve axle and a valve plate, characterised in that the exhaust is further provided with a valve housing having the butterfly valve mounted therein and comprising a bearing arrangement that bears the valve axle with axial expansion space with respect to the valve housing in an axial direction of the valve axle, the valve housing further comprising a seat that is shaped for 10 receiving at least part of a circumferential portion of the valve plate so that the valve plate can substantially seal off the flow path defined by the second exhaust tube with radial expansion space with respect to the valve housing in a radial direction of the valve plate, the axial and radial expansion space being adapted for allowing, in use of the exhaust, thermal expansion of the butterfly 15 valve as a result of heat generated by the engine, wherein the valve housing and the valve axle are dimensioned to fit, in use, inside the first and/or the second exhaust tube with the butterfly valve mounted in the valve housing, and/or wherein the second exhaust tube comprises a first tube segment and a second tube segment and the valve housing is dimensioned to fit in between 20 the first and second tube segment. Such possibilities of fitting the valve housing enable mounting of the butterfly valve in the valve housing externally of the exhaust, because, afterwards, the housing with the butterfly valve can still be mounted in the first exhaust tube, the second exhaust tube, and/or in between the first and second tube segments of the second exhaust tube. As a 25 result of such external mounting, a mounting tolerance of the butterfly valve can be better controlled. As a result, regulations on sound emission can be better met. Furthermore, in the exhaust, relatively high temperatures and temperature gradients may exist. The inventor realised that, during start-up of the engine, a temperature in an inner part of the exhaust may rise relatively 30 quickly, while a temperature in the outer part of the exhaust is still relatively 4 low. The heat generated by the engine may cause the butterfly valve to reach a temperature of, for example, over 500 degrees Celsius. As a result, inner parts of the exhaust, e.g. the butterfly valve, may thermally expand before outer parts of the exhaust, e.g. the first and/or second exhaust tube, have expanded.
5 As a result, the butterfly valve may get jammed in the valve housing. The inventor realised that therefore the expansion space, i.e. the axial expansion space and the radial expansion space, is required between the valve plate respectively the valve axle of the butterfly valve on the one hand, and the valve housing on the other hand, to prevent that the butterfly valve gets 10 jammed in the valve housing. At the same time however, there is a danger that such expansion space allows sound waves to pass the butterfly valve. This danger is important in view of modern regulations on sound emission by exhausts containing the relatively strict norms. By means of the seat, such passing of sound waves may be largely prevented while the axial and radial 15 expansion space can be allowed. Thus, with the valve plate in a closed position, the valve plate may substantially seal off the flow path defined by the second exhaust tube, e.g. substantially seal off the second exhaust tube, by a substantially closing contact of the valve plate on the seat. Thus, a diameter of the valve plate may be smaller than a diameter of second exhaust tube.
20 In order to set the axial and radial expansion space, externally mounting the butterfly valve in the housing is beneficial. Furthermore, externally mounting the butterfly valve in the housing enables to accurately position the valve axle with respect to the valve seat. Hence, in practice, externally mounting the butterfly valve in the valve housing significantly 25 enhances reliability and quality of the sealing off of the flow path defined by the second exhaust tube.
Preferably, the axial expansion space is at least 0.1 millimeter, at least 0.2 millimeter, at least 0.3 millimeter, at least 0.6 millimeter, at least 0.9 millimeter, at least 1.2 millimeter, or at least 1.5 millimeter. Alternatively or 30 additionally, the axial expansion space preferably is at most 2 millimeter, at 5 most 4 millimeter, or at most 6 millimeter. The axial expansion space may be adjusted to a length of the valve axle, e.g. in between axle stubs, and/or to a diameter of the valve plate in between bearings of the bearing arrangement. Said length and/or said diameter may be in a range from 1.5 to 10 centimeter, 5 e.g. approximately 2 centimeter, approximately 3 centimeter, approximately 5 centimeter, approximately 7.5 centimeter, e.g. approximately 3 inch, or approximately 10 centimeter. Other values of said length and said diameter are also possible. Preferably, the axial expansion space is in a range from 0.4 % to 10%, more preferably from 0.7% to 5%, e.g. from 1% to 3% or from 1.2% to 10 2.7%, of the length of the valve axle and/or of the diameter of the valve plate in between bearings of the bearing arrangement.
Preferably, the radial expansion space is, at a position along the circumferential portion of the valve plate, at least 0.2 millimeter, at least 0.4 millimeter, at least 0.7 millimeter, at least 1.1 millimeter, at least 1.7 15 millimeter, at least 2.3 millimeter or at least 3 millimeter. Alternatively or additionally, the radial expansion space preferably is, at a position along the circumferential portion of the valve plate, at most 3 millimeter, at most 6 millimeter, or at most 10 millimeter. The radial expansion space may be adjusted to a diameter of the valve plate, e.g. measured in a direction 20 transverse to a longitudinal direction of the valve axle. Said diameter optionally is in a range from 1.5 to 10 centimeter, e.g. approximately 2 centimeter, approximately 3 centimeter, approximately 5 centimeter, approximately 7.5 centimeter, e.g. approximately 3 inch, or approximately 10 centimeter. Other values of said diameter are also possible. Preferably, the 25 radial expansion space is in a range from 1% to 10%, more preferably from 1.5% to 5%, e.g. from 2% to 3.5% or from 2.3% to 3.2%, of the diameter of the valve plate.
The valve housing and the valve axle are dimensioned to fit, in use, inside the first and/or the second exhaust tube with the butterfly valve 30 mounted in the valve housing, and/or wherein the second exhaust tube 6 comprises a first tube segment and a second tube segment and the valve housing is dimensioned to fit in between the first and second tube segment. Thus, the valve plate may e.g. be dimensioned to fit inside the second and/or the first exhaust tube. Thus, the valve axle may e.g. be dimensioned to fit 5 inside the first exhaust tube when oriented perpendicular to a length direction of the first exhaust tube and/or the valve axle may be dimensioned to fit inside the second exhaust tube when oriented perpendicular to a length direction of the second exhaust tube.
Preferably, the valve housing comprises a first housing segment and 10 a second housing segment, said segments preferably forming separable parts of the bearing arrangement. Thus, preferably, the valve housing comprises at least two mutually separable housing parts, e.g. the first housing segment, i.e. a first housing part, and the second housing segment, i.e. a second housing part. The first and second housing segment may facilitate mounting the 15 butterfly valve in the valve housing. For example, the valve axle may first be positioned in the first housing segment. Subsequently, a position, the axial expansion space, and/or the radial clearance of the valve axle may be fixed by attaching the second housing segment to the first housing segment. For example, a part of the valve axle may be surrounded and enclosed by the first 20 and second housing segment after the first and second housing segment are attached to each other. The first and second housing segment are especially advantageous when the valve axle and the valve plate comprise one and the same material, preferably substantially consist of one and the same material, more preferably substantially consist of one piece of the one and the same 25 material. In that situation, mounting the butterfly valve in the valve housing would otherwise be problematic.
The first and second housing segment may, optionally, be mutually substantially symmetrical. The first and second housing segment may, optionally, both be shaped as a ring.
7
In a variation, the first exhaust tube forms an outer tube and the second exhaust tube forms an inner tube provided within the outer tube, wherein the muffler is provided in between the inner and outer tube, the valve housing and the valve axle further being dimensioned to fit, in use, inside the 5 first exhaust tube with the butterfly valve mounted in the valve housing. This variation may be especially suitable when the motorized vehicle is a motorcycle.
In another variation, the second exhaust tube is separate from, e.g. outside, the second exhaust tube, the valve housing and the valve axle being 10 dimensioned to fit, in use, inside the second exhaust tube with the butterfly valve mounted in the valve housing. Preferably, the valve housing is attached to the second exhaust tube. This other variation may be especially suitable when the motorized vehicle is a car.
The first exhaust tube may optionally be parallel with the second 15 exhaust tube.
Preferably, the valve housing is attached to the second exhaust tube. Optionally, the valve housing is attached to the second exhaust tube in between the first and second tube segment. For example, the valve housing may be provided with a connection structure for receiving the first and/or the 20 second tube segment, and/or for attaching thereto the first and/or the second tube segment. The connection structure may comprise e.g. at least one connection recess for receiving the first and/or the second tube segment, e.g. at least one connection notch. Alternatively or additionally, the connection structure may comprise a connection ridge. Optionally, the first housing 25 segment and the second housing are provided with the connection structure. In this way an assembly comprising the first tube segment, the second tube segment, the valve housing with the butterfly valve mounted therein, and optionally the muffler, can be provided. Such an assembly may, optionally, be inserted into the first exhaust tube. Thus, a convenient way of mounting the 30 butterfly valve in the exhaust may be enabled.
8
As another option, the second exhaust tube may be provided with a stop inside the second exhaust tube for placing the valve housing there against.
Preferably, the valve housing is shaped as a ring around the valve 5 plate. In this way, the radial expansion space between the valve plate and the housing around substantially the whole valve plate can be arranged with relatively high precision.
In an embodiment, the ring is provided with apertures. Preferably, the apertures are located outside the second tube segment. Preferably, a part 10 of the ring that includes the apertures forms an additional part to the muffler. Thus, the part of the ring that includes the apertures may forms a muffling part, in addition to the muffler. Such a ring is especially useful in the variation wherein the first exhaust tube forms an outer tube and the second exhaust tube forms an inner tube provided within the outer tube, wherein the muffler 15 is provided in between the inner and outer tube. The ring provided with apertures can be employed for attaching the second exhaust tube, e.g. the first and second tube segment, thereto. The apertures may form an additional part to the muffler, and may be located outside the second exhaust tube. The assembly of the ring-shaped valve housing, the butterfly valve, and the second 20 exhaust tube may, optionally, be inserted inside the first exhaust tube. The valve housing may be attached, e.g. welded or screwed, inside the first exhaust tube.
Preferably, the seat is shaped as a ridge that extends along two arcs that are spaced apart along a normal to a plane of the valve plate in the closed 25 position. Preferably, the ridge further comprises, at ends of the two arcs, ridge parts that match a rotation path of a surface of the butterfly valve near the ridge parts. As a result, leakage of air along the butterfly valve may be decreased. Advantageously, a ridge part along a first one of the arcs is comprised by the first housing segment and a ridge part along a second one of 30 the arcs is comprised by the second housing segment.
9
In an embodiment, the bearing arrangement comprises a first spherical bearing and/or a second spherical bearing, wherein the valve axle extends from the first spherical bearing to the second spherical bearing. By means of one or more spherical bearings, canting of the butterfly valve may be 5 less hindered by deformation, e.g. heat-induced deformation, of the valve axle as a result of thermally induced stress gradients in the butterfly valve. Hence, clearance of the bearing arrangement, in particular clearance in a radial direction of the valve axle, that may be needed to compensate for said deformation, may be substantially reduced in comparison with known bearing 10 arrangements that lack one or both of the first and second spherical bearing.
Preferably, the first spherical bearing and optionally the second spherical bearing each comprise a ball. Preferably, the ball is provided with an axle bearing that, in use, bears the valve axle. Preferably, the valve axle may have one or two axle stubs. Preferably, the ball is provided with an axle 15 bearing that, in use, bears an axle stub.
Preferably, the first spherical bearing substantially bears the valve axle with the axial expansion space. Preferably, the second spherical bearing limits translation of the valve axle in the axial direction with respect to the valve housing, preferably substantially fixes the valve axle in the axial 20 direction with respect to the valve housing. Thus, the axial expansion space in the first spherical bearing may be larger, e.g. at least three times larger, than the axial expansion space in the second spherical bearing. In this way, excessive vibrational translations of the butterfly valve during use may be prevented, while still providing for the axial expansion space.
25 In an embodiment, the axle bearing of the first spherical bearing, optionally in combination with the axle bearing of the second spherical bearing, bears the valve axle with an axial expansion space of at least 0.1 millimeter, at least 0.2 millimeter, at least 0.3 millimeter, at least 0.6 millimeter, at least 0.9 millimeter, at least 1.2 millimeter, or at least 1.5 30 millimeter. Alternatively or additionally, the axle bearing of the first spherical 10 bearing, preferably in combination with the axle bearing of the second spherical bearing, optionally bears the valve axle with an axial expansion space of at most 2 millimeter, at most 4 millimeter, or at most 6 millimeter. As a result of such expansion space, canting of the butterfly valve may be 5 substantially unhindered by extension of the valve axle in a direction along the valve axle as a result of thermally induced stress gradients in the butterfly valve.
In an embodiment, the axle bearing of the second spherical bearing bears the valve axle with an axial expansion space of at most 0.5 millimeter, at 10 most 0.3 millimeter, or at most 0.15 millimeter. Such expansion space may contribute to defining a position of the butterfly valve in the second exhaust tube. In this way, translation of the valve axle in the axial direction with respect to the valve housing can be limited.
In an embodiment, the first and/or the second exhaust tube is 15 provided with an opening for receiving a cam that is connected to the valve axle. Preferably, the cam is arranged for controlling the sealing off of the flow path defined by the second exhaust tube by means of the valve plate. Preferably, the cam is arranged for controlling an orientation of the valve plate. E.g., the cam may be arranged for moving the valve plate from a closed 20 position to an opened position and vice versa. Preferably, the cam is positioned on the valve axle for having the axial expansion space of the valve axle in the axle bearing of the second spherical bearing at most 0.5 millimeter, at most 0.3 millimeter, at most 0.15 millimeter, or at most 0.10 millimeter.
Preferably, the first housing segment and the second housing 25 segment each form a cup of the first spherical bearing and each form a cup of the second spherical bearing. The cups of the first and second housing segment may, optionally, be mutually substantially symmetrical. Optionally, the cup of the first spherical bearing and the cup of the second spherical bearing, of the first housing segment, may be similarly positioned and/or 11 shaped as the cup of the first spherical bearing and the cup of the second spherical bearing, of the second housing segment.
In an embodiment, the valve axle and the valve plate comprise one and the same material, preferably substantially consist of one and the 5 same material, more preferably substantially consist of one piece of the one and the same material. The valve axle and the valve plate substantially consist of one and the same material e.g. at least 80 wt% of the valve axle consist of the one and the same material and at least 80 wt% of the valve plate consists of the one and the same material. Such compositions of the valve plate 10 and the valve axle may be considered beneficial as thermal stress as a result of different material compositions can be substantially reduced. Furthermore, in this embodiment, movements such as vibrations of parts of the valve plate with respect to the axis may be reduced. Such reduction may be achieved by a better connection between the valve plate and the valve axle, enabled by the 15 external mounting of the butterfly valve in the valve housing. As a result, sound production that may be caused by said vibrations may be reduced as well.
It is a further object of the invention to provide an improved valve housing.
20 Thereto the invention provides a valve housing arranged for use in an exhaust for an engine of a motorized vehicle, such as a motorcycle or a car, which exhaust comprises a first exhaust tube, a second exhaust tube, and a muffler provided within the first exhaust tube, wherein the muffler and the second exhaust tube define different flow paths for gases that, in use, flow 25 through the exhaust, wherein the valve housing is arranged for mounting a butterfly valve therein and optionally is provided with the butterfly valve, the butterfly valve having a valve axle and a valve plate, the valve housing comprising a bearing arrangement for bearing the valve axle with axial expansion space with respect to the valve housing in an axial direction of the 30 valve axle, the valve housing further comprising a seat that is shaped for 12 receiving at least part of a circumferential portion of the valve plate so that the valve plate can substantially seal off the flow path defined by the second exhaust tube with radial expansion space with respect to the valve housing in a radial direction of the valve plate, the axial and radial expansion space being 5 adapted for allowing, in use of the exhaust, thermal expansion of the butterfly valve as a result of heat generated by the engine, wherein the valve housing and the valve axle are dimensioned to fit, in use, inside the second exhaust tube with the butterfly valve mounted in the valve housing, and/or wherein the second exhaust tube comprises a first tube segment and a second tube segment 10 and the valve housing is dimensioned to fit in between the first and second tube segment. Thus, a valve housing is provided that is, optionally, arranged for use in the exhaust according to the invention. Thus, optionally, the exhaust according to the invention is provided with the valve housing according to the invention.
15 According to the invention, the valve housing is arranged for use in an exhaust for a motorized vehicle, such as a motorcycle or a car. Thereto, the valve housing and/or the butterfly valve may e.g. be substantially free of rubber and/or plastic components.
It is a further object of the invention to provide an improved 20 motorized vehicle.
Thereto the invention provides a motorcycle vehicle, provided with an exhaust according to the invention and/or a valve housing according to the invention.
It is a further object of the invention to provide an improved method 25 of mounting a butterfly valve in an exhaust for a motorized vehicle.
Thereto the invention provide a method of mounting a butterfly valve in an exhaust for a motorized vehicle, such as a motorcycle or a car, the method comprising - providing a first exhaust tube, a second exhaust tube, and a muffler provided within the first exhaust tube; - providing a butterfly valve 30 having a valve axle and a valve plate; - providing a valve housing comprising a 13 bearing arrangement for bearing the valve axle; and - mounting the butterfly valve in the valve housing so that the bearing arrangement bears the valve axle; and, subsequently to said mounting, - fitting the valve housing and the valve axle inside the second exhaust tube and/or fitting the valve housing in 5 between a first tube segment and a second tube segment of the second exhaust tube.
Preferably, the exhaust the exhaust is an exhaust according to the invention and/or the valve housing is a valve housing according to the invention.
10 The invention will now be illustrated, in a non-limiting way, with reference to the accompanying drawing, wherein:
Figure 1A schematically shows a longitudinal cross section of an exhaust in a first embodiment according to the invention; 15 Figure IB schematically shows a longitudinal cross section of an exhaust in a second embodiment according to the invention;
Figure 2 shows a part of a valve housing, a first tube segment, and a second tube segment;
Figure 3A shows an example of a valve plate and a valve axle; 20 Figure 3B also shows two balls of respectively a first spherical bearing and a second spherical bearing;
Figure 3C illustrates an axial expansion space and a radial expansion space;
Figure 3D schematically shows a cross-sectional view of a butterfly 25 valve;
Figure 3E shows another possible cross-section of a butterfly valve;
Figure 3F shows a cross-section of a valve axle in a plane along an axial direction of the valve axle and transverse to a valve plate;
Figure 4 shows an exploded view of an embodiment of a valve 30 housing with a butterfly valve mounted therein; and 14
Figure 5 shows a second housing segment of the embodiment of figure 4.
Unless stated otherwise, like reference numerals refer to like elements 5 throughout the drawings.
Figure 1A schematically shows a longitudinal cross section of an exhaust 2 in a first embodiment according to the invention. Figure IB schematically shows a longitudinal cross section of an exhaust 2 in a second embodiment according to the invention. The exhaust 2 of figures 1A and IB 10 may be suitable for use on a motor cycle or another motorized vehicle.
The exhaust 2 comprises a first exhaust tube 4A, a second exhaust tube 4B, and a muffler 6 provided within the first exhaust tube 4A. The muffler 6 may comprise muffler elements 6A that are arranged for muffling sound waves generated by an engine of the motorized vehicle that propagate in the first 15 tube.
In the first embodiment, the first exhaust tube 4A may form an outer tube and the second exhaust tube 4B forms an inner tube provided within the outer tube. The muffler 6 may be provided in between the inner and outer tube. In particular, the muffler 6 and/or the muffler elements 6A may be 20 provided in an annular space 7 in between the second exhaust tube 4B and the first exhaust tube 4A.
In the second embodiment, the second exhaust tube 4B may be separate from, e.g. may be outside, the first exhaust tube 4A. The first exhaust tube 4A and the second exhaust tube 4B may be connected to a main exhaust 25 tube 4C. The second embodiment of the exhaust 2, and other embodiments wherein the second exhaust tube 4B is separate from, e.g. outside, the first exhaust tube 4A, may be especially useful when the motorized vehicle is a car.
In the first and second embodiment, the exhaust 2 may further be provided with a butterfly valve 8 having a valve axle 10 and a valve plate 12. 30 The valve plate 12 may e.g. be circular. The valve plate 12 may have a 15 diameter between 4 and 6 centimeter, typically approximately 5 centimeter. However, other shapes and/or other diameters are also possible. Figures 1A and IB show the butterfly valve 8 and the valve plate 12 in an opened position. After canting the valve plate 12 around the valve axle 10, the butterfly valve 8 5 and the valve plate 12 may be brought into a closed position, indicated by dashed line 14. As a result, the second exhaust tube 4B may be substantially sealed off or blocked. The butterfly valve 8 may thus be arranged for substantially sealing off or blocking the second exhaust tube 4B.
Arrows Gi and G2 indicate possible different, mutually alternative, flow 10 paths of exhaust gas in use of the exhausts 2. A first flow path Gi may be defined by the second exhaust tube 4B. The second exhaust tube may be provided with openings 5. A second flow path G2 may be defined by the muffler 6 and/or the openings 5. The second flow path may pass through the muffler 6 and the openings 5. It may be clear that when the butterfly 8 valve is opened a 15 volumetric flow rate of exhaust gases through the second exhaust tube 4B may be larger than a volumetric flow rate of exhaust gases through the first exhaust tube 4A and the muffler 6. Hence, when the butterfly valve 8 is opened, a volumetric flow rate of exhaust gases through the second exhaust tube 4B may be larger than a volumetric flow rate of exhaust gases through 20 the muffler 6. Thus, exhaust gases produced by the engine may escape relatively easily through the second exhaust tube 4B. As a result, power of the engine of the motorized vehicle may be relatively high. Furthermore, a relatively loud undisturbed engine sound can be heard by a user of the motorized vehicle.
25 When the butterfly valve 8 is closed, a volumetric flow rate of exhaust gases through the first exhaust tube 4A and the muffler 6 may be larger than a volumetric flow rate of exhaust gases through the second exhaust tube 4B. Thus, exhaust gases may predominantly flow through the muffler 6 and the first exhaust tube 4A. As a result, the power of the engine is somewhat 16 decreased. Furthermore, the sound of the engine is disturbed and muffled by the muffler 6.
The exhaust 2 may further be provided with a valve housing 16 for mounting the butterfly valve 8 therein. The valve housing 16 may comprise a 5 bearing arrangement for bearing the valve axle 10 with axial expansion space with respect to the valve housing in an axial direction of the valve axle. Said axial expansion space is adapted for allowing, in use of the exhaust 2, thermal expansion of the butterfly valve 8 as a result of heat generated by the engine. Such a bearing arrangement is not visible in figures 1A and IB but is shown is 10 figures 2 and 4 with reference number 24. The valve housing 16 may be attached to the second exhaust tube 4B.
The valve housing 16 in the first and second embodiment may comprise a seat 40 that is shaped for receiving at least part of a circumferential portion 12’ of the valve plate 12 so that the valve plate 12 can 15 substantially seal off the flow path Gi defined by the second exhaust tube 4B. The circumferential portion 12’ of the valve plate 12 may substantially seal off the flow path Gi with radial expansion space with respect to the valve housing 16 in a radial direction of the valve plate 12. Said radial expansion space is adapted for allowing, in use of the exhaust 2, thermal expansion of the 20 butterfly valve 8 as a result of heat generated by the engine. The axial and radial direction are indicated in figures 3A-3F with arrows Fi respectively F2. It is noted that the axial and radial directions are not necessarily orthogonal. Instead, the radial direction F2 may substantially coincide with the axial direction Fi.
25 The valve housing 16 and the valve axle 10 may e.g. be dimensioned to fit, in use, inside the first exhaust tube 4A and/or the second exhaust tube 4B with the butterfly valve 8 mounted in the valve housing 16. Thus, as a result of said fit, the valve housing 16 with the butterfly valve 8 mounted therein, can be inserted in the first exhaust tube 4A and/or the second exhaust 30 tube 4B. This enables precise mounting of the butterfly valve 8 in the valve 17 housing 16, which can now be performed outside the exhaust 2. Such precise mounting may enable controlling, relatively precisely, a position of the butterfly valve 8, in particular of the valve plate 12 of the butterfly valve 8, in e.g. the first exhaust tube 4A and/or the second exhaust tube 4B and/or in 5 between tube segments of the second exhaust tube 4B. As a result, an expansion space around the butterfly valve 8, e.g. around the valve plate 10 of the butterfly valve 8, with respect to a seat 40 of the valve housing may be controlled precisely enough to meet regulations on sound emission. As another result, the expansion space may be large enough to prevent that the butterfly 10 valve gets jammed in the exhaust 2, in particular in the first and/or second exhaust tube 4A, 4B, as a result of heating of the butterfly valve, e.g. in a relatively cool exhaust 2.
The second exhaust tube may be provided with a stop 25 inside the second exhaust tube 4B for placing the valve housing 16 there against during 15 insertion of the valve housing 16 in the second exhaust tube 4B.
In order to be suitable for use on a motor cycle or another motorized vehicle, the valve housing and/or the butterfly valve may be substantially free of rubber and/or plastic components. Such components could be too vulnerable for repeated exposure to heat generated by the engine of the motor cycle or the 20 other motorized vehicle.
In the second embodiment, the valve housing 16 and the valve axle 10 may be dimensioned to fit, in use, inside the second exhaust tube 4B with the butterfly valve 8 mounted in the valve housing 16. Thus, the valve housing 16 with the butterfly valve 8 mounted therein may be inserted into the second 25 exhaust tube 4B. Such inserting is indicated by arrow I in figure IB.
In the first embodiment, the valve housing 16 and the valve axle 10 may be dimensioned to fit, in use, inside the first exhaust tube 4A with the butterfly valve 8 mounted in the valve housing 16. In the first embodiment, the valve housing 16 may not fit inside the second exhaust tube 4B. The 30 second exhaust tube 4B may comprise a first tube segment 4B’ and a second 18 tube segment 4B”. The valve housing 16 may be attached to the second exhaust tube 4B in between the first and second tube segment 4B’, 4B”. For example, the first tube segment 4B’ and the second tube segment 4B” may be welded to the valve housing 16. Such welding may advantageously be 5 performed outside the exhaust 2. Afterwards, the valve housing 16 with the first tube segment 4B’, the second tube segment 4B”, and the muffler 6 attached thereto, may be inserted into the first exhaust tube 4A. Such inserting is indicated by arrow I in figure IB. Thus, in the first embodiment, the valve housing 16 and the valve axle 10 are dimensioned to fit in between 10 the first tube segment 4B’ and the second tube segment 4B”. It is noted however that also in a variation of the second embodiment, the valve housing 16 and the valve axle 10 may be dimensioned to fit, and optionally fitted, in between the first tube segment 4B’ and the second tube segment 4B”.
Mounting the butterfly valve 8 in the exhaust 2 for the motorized 15 vehicle, e.g. the motorcycle, may thus be performed in an embodiment of a method according to the invention. Such an embodiment may comprise the step of providing the first exhaust tube 4A, the second exhaust tube 4B, and the muffler 6 provided within the first exhaust tube 4A. The embodiment of the method may further comprise providing the butterfly valve 8 having the 20 valve axle 10 and the valve plate 12. The method may, in said embodiment, further comprise providing the valve housing 16 comprising the bearing arrangement 24 for bearing the valve axle 10. The embodiment of the method according to the invention may further comprise mounting the butterfly valve 8 in the valve housing 16. Subsequently to said mounting, the method may 25 comprise fitting the valve housing 16 and the valve axle 10 inside the second exhaust tube 4B and/or may comprise fitting the valve housing 16 and optionally the valve axle 10 in between the first tube segment 4B’ and the second tube segment 4B” of the second exhaust tube 4B.
Figure 2 shows part of the valve housing 16, the first tube segment 4B’, 30 and the second tube segment 4B”. The valve housing 16 may be shaped as a 19 ring, e.g. a circular ring or an oval ring or a rectangular ring. The valve housing 16 may be shaped as a ring around the valve plate 12 (not visible in figure 2) and comprises a bearing arrangement 24 for the valve axle 10. More in general, the valve housing 16 may be shaped similarly as a circumference of 5 the first and/or second exhaust tube 4B. In this example, the second exhaust tube 4B, in particular the first tube segment 4B’ and second tube segment 4B”, is shaped as a circular ring, as well as the valve housing 16.
The valve housing 16 may be provided with apertures 20 that are located outside the second tube segment 4B. Thus, the apertures 20 may be 10 spaced apart from the second tube segment in the radial direction. As can be seen in figure 1A, a part of the ring that includes the apertures 20 may thus form an additional part to the muffler 6.
Figure 2 further shows the valve axle 10. In general, an extent of the valve axle 10 is preferably limited by an imaginary surface that forms an 15 extension of an outer surface 22 of the valve housing 16. Thus, the valve axle 10 preferably does not project out of the valve housing 16. Hence, the valve axle 10 preferably does not project through the imaginary surface. As a result, in the first embodiment, if the valve housing 16 is dimensioned to fit, in use, in the first exhaust tube 4A, the valve housing 16 and the valve axle 10 are also 20 dimensioned to fit, in use, inside the first exhaust tube 4A with the butterfly valve 8 mounted in the valve housing 16.
More in general, a thickness and composition of the valve plate 12 and/or the valve axle 10 preferably is arranged for substantially preventing, in use, vibrations of the valve plate 12 in the closed position 14. Preferably, a 25 thickness of the valve plate 12 is at least 2 millimeter, preferably at least 3 millimeter. Preferably, the valve plate 12 comprises steel, and preferably is made of steel, for example stainless steel. Experiments performed by the inventor showed that such properties of the valve plate 12 may substantially prevent said vibrations. As a result of preventing such vibrations, a lifetime of 30 the butterfly valve 8 may be extended. Additionally, sound waves that may be 20 generated by or transmitted through the valve plate 12, may be reduced in strength.
Figure 3A shows an example of the valve plate 12 and the valve axle 10. In this example, the valve axle 10 and the valve plate 12 substantially consist 5 of one and the same material, for example steel, e.g. stainless steel. The valve plate 12 and the valve axle 10 preferably substantially consist of one piece of the one and the same material. I.e., the valve plate and the valve axle together, may be substantially free of internal joints. The valve plate 12 and the valve axle 10 can for example be made of one piece of base material, e.g.
10 steel, e.g. stainless steel. When using such a valve axle 10 and valve plate 12, it will be appreciated even more that the valve housing 16 and the valve axle 10 are dimensioned to fit, in use, inside the first exhaust tube 4A and/or the second exhaust tube 4B, with the butterfly valve 8 mounted in the valve housing 16.
15 Figure 3A again shows the valve plate 12 and the valve axle 10 of figure 3A. Figure 3B also shows two balls 26 of respectively a first spherical bearing 32A and a second spherical bearing 32B. The balls 26 are each provided with an axle bearing 30 that, in use, bears the valve axle 10. The axle bearings 30 may comprise slide bearings. Thus, each axle bearing 30 may 20 comprise a slide bearing. The spherical bearings 32A, 32B may allow for deformations of the butterfly valve, in particular deformations of the axle of the butterfly valve, without severely hindering canting of the butterfly valve 8. Such deformations may e.g. result from heat gradients inside the butterfly valve and/or back fires in the engine. Thus, as a result of the spherical 25 bearings 32A, 32B, a sensitivity of the butterfly valve 8 for deformations of the butterfly valve 8 may be reduced. Hence, clearance of the bearing arrangement, in particular clearance in a radial direction of the valve axle 10, may be substantially reduced in comparison with known bearing arrangements that lack one of the, or both, spherical bearings 32A, 32B.
21
The valve axle 10 may have one or two axle stubs 34. Preferably, the axle bearing 30 of the first spherical bearing 32A bears the valve axle 10 with an axial expansion space, e.g. of at least 0.6 millimeter. Thereto, a length Li of an axle stub 34 associated with the first spherical bearing 32A may be adapted 5 to a thickness Wi, measured parallel with the valve axle 10, of the ball 26 associated with the first spherical bearing 32A. The axle stub 34 may extend from the valve plate 12 over a distance of e.g. at least 0.6 millimeter and at most 1.4 millimeter, e.g. approximately 0.9 or approximately 1.0 millimeter, before reaching the first spherical bearing, thus providing axial expansion 10 space. As a result of such expansion space, it may be substantially prevented that the butterfly valve 8 gets jammed as a result of heating of the butterfly valve 8. Such values of the axial expansion space combine well with the valve plate 12 having a diameter between 4 and 6 centimeter, typically approximately 5 centimeter.
15 Generally, values of expansion space and clearance provided herein may e.g. refer to a situation before or after use when the exhaust, the butterfly valve, and the valve housing have adjusted to a temperature of an environment of the motorized vehicle, e.g. have a temperature of approximately 20 degrees Celsius. Alternatively, the values of expansion space 20 and clearance provided herein may refer to a situation during use.
Preferably, the axle bearing 30 of the second spherical bearing 32B bears the valve axle 10, e.g. with an axial expansion space of at most 0.25 millimeter. For example, a length L2 of an axle stub 34 associated with the second spherical bearing 32B may be at most 0.25 millimeter larger than a 25 thickness W2, measured parallel with the valve axle 10, of a the ball 26 associated with the second spherical bearing 32B.
More in general, the slide bearings may have sliding surfaces formed by an outer surface 33 of the axle stubs 34 and an inner surface 35 of a bearing cavity 37 provided in the balls 26. A material composition of the inner surface 30 35 may be similar, e.g. identical, to a material composition of the outer surface 22 33. A hardness of the inner surface 35 may be similar, e.g. identical, to a hardness of the outer surface 37. For example, the outer surface 33 and the inner surface 35 may be formed by a layer comprising Nickel, e.g. a layer substantially made of Nickel. Thus, the axle stubs 34 may be provided with a 5 layer, e.g. the layer comprising Nickel, and/or the balls 26 may have a cavity being provided with a layer, e.g. the layer comprising Nickel. Such properties of the sliding surfaces of slide bearings are uncommon but advantageous for application in an exhaust.
Figure 3C illustrates the axial expansion space Δαχ and the radial 10 expansion space Arad, as well as the bearing cavity 37, the inner surface 35 of the bearing cavity 37, and the outer surface 33 of the axle stubs 34. The axial expansion space Δαχ may be the sum of an axial expansion space Δαχ,a in the first spherical bearing 32A and an axial expansion space Δαχ,β in the second spherical bearing 32B. However, preferably, it holds that Δαχ,a » Δαχ,β, so that 15 Δαχ may be considered to be approximately equal to Δαχ,a. For embodiments wherein a length Lp,a of the valve axle in between the axle stubs 34 and/or of the valve plate in between bearings 32A, B of the bearing arrangement is approximately 5 centimeter, the axial expansion space Δαχ may be at least 0.6 millimeter and/or at most 1.4 millimeter. Advantageously, for other values of 20 the length Lp,a, the value of the axial expansion space Δαχ may change linearly proportionally with the length Lp,a. The axial expansion space Δαχ may thus be adjusted to the length of the valve axle in between the axle stubs 34 and/or to a diameter of the valve plate in between the bearings 32A, B of the bearing arrangement.
25 In figure 3C, part of a boundary of the seat 40 is indicated by dashed line 40’. For embodiments wherein the diameter of the valve plate Lp, e.g. measured in the direction transverse to the longitudinal direction of the valve axle, is approximately 5 centimeter, the radial expansion space Arad may be at least 1.1 millimeter and/or at most 1.6 millimeter, e.g. approximately 1.35 mm.
23
Advantageously, for other values of the diameter of the valve plate Lp, the value of the radial expansion space Arad may change linearly proportionally with the length Lp. The radial expansion space Arad may thus be adjusted to the diameter of the valve plate Lp, e.g. measured in the direction transverse to 5 the longitudinal direction of the valve axle. It is noted that the radial direction F2 along which Arad is measured, may approximately be directed along the axial direction Fi, but can alternatively be transverse to the axial direction Fi.
Figure 3C also indicates the clearance Ab, in the first and second bearing arrangement, in a radial direction of the valve axle. Said clearance Ab 10 may typically be in a range from 0.1 millimeter to 0.4 millimeter, e.g.
approximately 0.2 millimeter. Said clearance Ab may equal half of a difference between a diameter 37’ of the bearing cavity 37 and a diameter 34’ of an axle stub 34, e.g. being approximately 8 millimeter.
Figure 3D schematically shows a cross-sectional view of the butterfly 15 valve 8, along section A-A’ as indicated in figure 3A. A first plane 27A wherein a first portion 12A of the valve plate 12 extends may be offset with respect to a second plane 27B wherein a second portion 12B of the valve plate 12 extends. Hence, the butterfly valve 8 may be asymmetrically shaped with respect to a plane, e.g. the first plane 27A or the second plane 27B, along which the valve 20 plate 12 extends. A surface 29 of the valve axle 10 may have facets 29’, as in this example, e.g. four facets, or may be rounded. The surface 29 having the facets 29’ may enable relatively easy manufacturing of the butterfly valve 8. A surface 29 of the valve axle 10 that is rounded may be obtained by casting the butterfly valve 8.
25 Figure 3E shows another possible cross-section of the butterfly valve 8, along section A-A’ as indicated in figure 3A. A thickness Di of the valve plate 12, at a part of the circumferential portion 12’ that is spaced apart from the valve axle 10, may be smaller, e.g. at least 1.5 times smaller, than a thickness D2 of the valve plate near a central portion 12” of the valve plate 12. Thus, the 24 valve plate 10 may be aerodynamically shaped. The valve plate 10 may e.g. be substantially rounded and may e.g. be substantially free of edges. This may be beneficial when the butterfly valve 8 and the valve plate 10 are in the opened position. More in general, the circumferential portion 12’ and/or the central 5 portion 12” of the valve plate 12 may extend over e.g. 5% or 10% of a diameter Lp of the valve plate 10.
Figure 3F shows a cross-section of the valve axle 10 in a plane along the axial direction Fi of the valve axle 10 and transverse to the valve plate 12. The valve axle 10 may have a thickness Ai in said plane, at or near a central 10 portion 10” of the valve axle. The valve axle 10 may have a thickness A2 in said plane, at or near an outer portion 10’, e.g. adjacent to the stubs 34, of the valve axle 10. The thickness Ai may be smaller, e.g. at least 1.2 times smaller, than the thickness A2. The central portion 10” of the valve axle 10 and/or the outer portion 10’ of the valve axle 10 may extent over e.g. 5% or 10% of a length La of 15 the valve axle 10.
Figure 4 shows an exploded view of an embodiment of the valve housing 16 with the butterfly valve 8 mounted therein. The valve housing 16 comprises the bearing arrangement 24. The bearing arrangement 24 comprises the first spherical bearing 32A and the second spherical bearing 32B. After the 20 butterfly valve 8 is mounted in the valve housing 16, the valve axle 10 extends from the first spherical bearing 32A to the second spherical bearing 32B.
The valve housing 16 of figure 4 may be arranged for use in the exhaust 2 for the motorized vehicle, e.g. the motorcycle. Such an exhaust 2 may comprises the first exhaust tube 4A, the second exhaust tube 4B, and the 25 muffler 6 provided within the first exhaust tube 4A. The valve housing 16 is arranged for mounting the butterfly valve 8 therein. Thereto the valve housing 16 may comprise the bearing arrangement 24 for bearing the valve axle 10 of the butterfly valve 8. The valve housing 16 and the valve axle 10 are dimensioned to fit, in use, inside the second exhaust tube 4B with the butterfly 30 valve 8 mounted in the valve housing 16. Alternatively or additionally, the 25 the second exhaust tube 4B comprises the first tube segment 4B’ and a second tube segment 4B” and the valve housing 16 is dimensioned to fit in between the first tube segment 4B’ and second tube segment 4B”.
The valve housing 16 may comprise a first housing segment 16A and 5 a second housing segment 16B. The first housing segment 16A and the second housing segment 16B may each form a cup 36A of the first spherical bearing 32A and each form a cup 36B of the second spherical bearing 32B. The first housing segment 16A and the second housing segment 16B may be provided with screw holes 38 for attaching the first and second housing segments 16A, 10 16B with each other. The screw holes 38 of the first housing segment 16A may extend through the first housing segment 16A, i.e. may form through-holes.
The screw holes 38 of the second housing segment 16B may also extend through the second housing segment 16B, or may partly extend through the second housing segment 16B. i.e. may form blind holes. The screw holes 38 of 15 the first housing segment 16A may be threaded or may not be threaded. The screw holes 38 of the second housing segment 16B may be threaded.
The cups 36A, 36B of first and second housing segment 16A, 16B may, optionally, be substantially symmetrical. E.g., the cups 36A, 36B of the first housing segment 16A may substantially be a mirror image of the cups 20 36A, 36B of the second housing segment 16B. Optionally, the cup 36A of the first spherical bearing 32A and the cup 36B of the second spherical bearing 32A, of the first housing segment 16A, may be similarly positioned and/or shaped as the cup 36A of the first spherical bearing 32A and the cup 36B of the second spherical bearing 32B, of the second housing segment 16B. Such may 25 further add to precision of mounting the butterfly valve 8. Hence, clearance of the butterfly valve 8 needed in a design for setting off mounting imprecision, may be further reduced. More in general, the first and second housing segment 16A, 16B may be provided with the screw hole 38 in a vicinity of the bearing arrangement 24. As a result, positions of the cups 36A of the first spherical 30 bearing 32A and the cups 36B of the second spherical bearing 32B can be 26 better defined. These positions may e.g. be less prone to mechanical perturbations such as engine vibrations.
A cam 46, as shown in figure 4, may be connected to the valve axle 10, in particular to the axle stub 34 associated with the second spherical 5 bearing 32B. The valve axle 10 may be provided with a notch for receiving the cam 46. The notch is not visible in figure 4 but is shown in figures 3A and 3B with reference number 47. The cam 46 may, alternatively or additionally, e.g. be screwed on the valve axle 10 by means of a screw 49, in particular on the axle stub 34 associated with the first spherical bearing 32A. The first and 10 second housing segments 16A, 16B may be provided with a cavity 48 for receiving the cam 46. The first exhaust tube 4A and/or the second exhaust tube 4B may be provided with an opening for receiving the cam 46. The cam 46 may be connected to the valve axle 10 to project outside the first exhaust tube 4A and/or the second exhaust tube 4B. A force exerted by an actuator mechanism 15 for canting the butterfly valve 8 may be applied to the cam 46. The cam 46 may project in an axial direction from the valve axle 10, in particular from the axle stub 34. A diameter of the cam 46 may exceed a diameter of the valve axle 10 or the axle stub 34 to which the cam 46 may be connected, near a position of such connection. Hence, when the axle bearing 30 bears the valve axle 10 or 20 the axle stub 34, the cam 46 when connected to the valve axle 10 or the axle stub 34 may limit movement of the valve axle 10 in an axial direction of the valve axle 10. Hence, the cam 46 may be used for limiting axial expansion space of the valve axle 10 in the axle bearing 30 of the second spherical bearing 32B. It may thus be clear how, for example, the cam 46 can be 25 positioned on the valve axle 10 for having the axial expansion space of the valve axle 10 in the axle bearing 30 of the second spherical bearing 32B at most, e.g., 0.25 millimeter.
The valve housing 16 may comprise a seat 40 on which the valve plate 12 can substantially seal off the second exhaust tube 4B when the 30 butterfly valve 8 and the valve plate 12 are in the closed position 14. The seat 27 40 may be shaped as a ridge that extends along two arcs 42A, 42B that are spaced apart along a normal to a plane of the valve plate 12 in the closed position 14. The arcs may be have a rounded shape and/or may have a rectangular shape, e.g. comprise edges.
5 The valve housing, e.g. the first housing segment 16A and/or the second housing segment 16B, may be provided with a connection structure. In this example the connection structure comprises a connection ridge 43A and a connection recess 43B. The connection ridge 43A may be arranged for attaching the first tube segment 4B’ or the second tube segment 4B” thereto, 10 e.g. by welding. The connection recess 43B may be arranged for receiving the first tube segment 4B’ or second tube segment 4B”. Figure 5 shows the second housing segment 16B of the embodiment of figure 4. The ridge 40 may further comprises, at ends of the two arcs, ridge parts 44 that match a rotation path of a surface of the butterfly valve 8 near the ridge parts 44.
15 It is noted that a butterfly valve as described with reference to figures 3A-3F may be mounted in a housing as described with reference to figures 1, 2, and 4, but that alternatively another butterfly valve may be used. The housing and butterfly valve as described with reference to figure 1, 2, and 4 may be used in an exhaust according to the first embodiment, according to 20 the second embodiment, and according to the variation of the second embodiment. However, another housing and butterfly valve may be used as well in those embodiments of the exhaust.
More in general, the first exhaust tube 4A may e.g. form an outside surface of the exhaust 2. However, alternatively, the exhaust 2 may e.g.
25 comprise an additional exhaust tube, wherein the first and second exhaust tube may be provided, at least partly, within the additional exhaust tube. Then, the first exhaust tube 4A may be perforated. Then, also, an annular space in between the perforated first exhaust tube and the additional exhaust tube may be filled with a damping material, e.g. a metal damping fabric. Such 30 fabric may e.g. be damping wool. Thus, the second flow path G2 may pass, via 28 perforation in the first exhaust tube, through the additional exhaust tube outside the first and second exhaust tube.
The invention is not limited to any embodiment herein described and, within the purview of the skilled person, modifications are possible which 5 may be considered within the scope of the appended claims. Equally all kinematic inversions are considered inherently disclosed and to be within the scope of the present invention. The use of expressions like: "preferably", “in particular”, “typically”, etc. is not intended to limit, the invention. The indefinite article “a” or “an” does not exclude a plurality. Features which are 10 not specifically or explicitly described or claimed may be additionally comprised in the structure according to the present invention without deviating from its scope.
Claims (25)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL2005304A NL2005304C2 (en) | 2010-09-02 | 2010-09-02 | Exhaust, valve housing, motorized vehicle, and method of mounting. |
| PCT/NL2011/050599 WO2012030222A1 (en) | 2010-09-02 | 2011-09-01 | Exhaust, valve housing, motorized vehicle, and method of mounting |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL2005304A NL2005304C2 (en) | 2010-09-02 | 2010-09-02 | Exhaust, valve housing, motorized vehicle, and method of mounting. |
| NL2005304 | 2010-09-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL2005304C2 true NL2005304C2 (en) | 2012-03-05 |
Family
ID=45954082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL2005304A NL2005304C2 (en) | 2010-09-02 | 2010-09-02 | Exhaust, valve housing, motorized vehicle, and method of mounting. |
Country Status (1)
| Country | Link |
|---|---|
| NL (1) | NL2005304C2 (en) |
-
2010
- 2010-09-02 NL NL2005304A patent/NL2005304C2/en not_active IP Right Cessation
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