WO2006038121A1 - Torsion beam suspension apparatus - Google Patents

Torsion beam suspension apparatus Download PDF

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Publication number
WO2006038121A1
WO2006038121A1 PCT/IB2005/003225 IB2005003225W WO2006038121A1 WO 2006038121 A1 WO2006038121 A1 WO 2006038121A1 IB 2005003225 W IB2005003225 W IB 2005003225W WO 2006038121 A1 WO2006038121 A1 WO 2006038121A1
Authority
WO
WIPO (PCT)
Prior art keywords
wall
torsion beam
protrusions
convex portion
suspension apparatus
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/IB2005/003225
Other languages
French (fr)
Inventor
Satoshi Murata
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Motor Corp
Original Assignee
Toyota Motor Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyota Motor Corp filed Critical Toyota Motor Corp
Priority to DE602005009001T priority Critical patent/DE602005009001D1/en
Priority to EP05794320A priority patent/EP1796927B1/en
Priority to US10/570,142 priority patent/US7478820B2/en
Publication of WO2006038121A1 publication Critical patent/WO2006038121A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B35/00—Axle units; Parts thereof ; Arrangements for lubrication of axles
    • B60B35/02—Dead axles, i.e. not transmitting torque
    • B60B35/04—Dead axles, i.e. not transmitting torque straight
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G21/00—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces
    • B60G21/02—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected
    • B60G21/04—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically
    • B60G21/05—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically between wheels on the same axle but on different sides of the vehicle, i.e. the left and right wheel suspensions being interconnected
    • B60G21/051—Trailing arm twist beam axles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/20—Constructional features of semi-rigid axles, e.g. twist beam type axles
    • B60G2206/202—Constructional features of semi-rigid axles, e.g. twist beam type axles with a radially deformed tube as a cross member
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/40—Constructional features of dampers and/or springs
    • B60G2206/42—Springs
    • B60G2206/427—Stabiliser bars or tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/80—Manufacturing procedures
    • B60G2206/81—Shaping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/80—Manufacturing procedures
    • B60G2206/81—Shaping
    • B60G2206/8102—Shaping by stamping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/80—Manufacturing procedures
    • B60G2206/81—Shaping
    • B60G2206/8103—Shaping by folding or bending
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/80—Manufacturing procedures
    • B60G2206/81—Shaping
    • B60G2206/8107—Shaping by hydroforming

Definitions

  • the invention relates to a torsion beam suspension apparatus.
  • a torsion beam suspension apparatus in which a torsion beam is formed of a pipe having a cylindrical shape, and an axial-direction intermediate portion of the pipe is pressed so as to have a substantially V-shape cross section or a substantially U-shape cross section.
  • a space internal space
  • an outer wall and an inner wall are in contact with each other, and a space is formed at each of both end portions having a circular arc shape, at which the outer wall and the inner wall are connected to each other.
  • torsional rigidity and a shear center position when right and left wheels are displaced to opposite phases (in opposite directions) and the torsion beam is twisted, by adjusting a width of the space to a predetermined value, and changing the shape of the cross section.
  • the torsional rigidity is changed, roll stiffness of the vehicle is changed.
  • the shear center position is changed, a displacement amount and a displacement direction of trailing arms and the like are changed when the torsion beam is twisted.
  • a steering characteristic of the vehicle is changed.
  • Each of the aforementioned torsion beams is generally formed by press forming using an upper die and a lower die.
  • the former torsion beam since the space having a predetermined width needs to be formed between the outer wall and the inner wall, the lower die cannot be pressed to the upper die during a forming process. That is, positioning of the lower die with respect to the upper die is likely to be insufficiently accurate. This causes variations in the shape of the cross section of the torsion beam. As a result, it is difficult to set the torsional rigidity to a predetermined value, and to set the shear center position to a predetermined position.
  • the outer wall and the inner wall are in contact with each other except the both end portions, it is possible to prevent the aforementioned variations in the shape of the cross section of the torsion beam.
  • the outer wall and the inner wall are in surface contact with each other, the outer wall and the inner wall slidably contact each other when the torsion beam is twisted, which causes abnormal noise.
  • a torsion beam suspension apparatus in which torsional rigidity and a shear center position of a torsion beam can be easily set to a predetermined value and a predetermined position, respectively, and occurrence of abnormal noise can be suppressed when the torsion beam is twisted.
  • a torsion beam suspension apparatus includes a torsion beam which, in use, extends in a width direction of a vehicle, whose one end is connected to one of paired right and left trailing arms, and whose other end is connected to the other of the paired right and left trailing arms.
  • the torsion beam is formed of a pipe having a cylindrical shape; an axial-direction intermediate portion of the pipe is pressed so as to have a substantially V-shape cross section or a substantially U-shape cross section; a convex portion is formed on at least one of an outer wall and an inner wall that constitute a double wall formed by pressing the pipe, and the convex portion protrudes from one of the outer wall and the inner wall on which the convex portion is formed to the other of the outer wall and the inner wall on which the convex portion is not formed; and the outer wall and the inner wall are in contact with each other at the convex portion.
  • the lower die When the torsion beam is formed, for example, the lower die is moved toward the upper die until a portion of the pipe constituting the outer wall and a portion of the pipe constituting the inner wall contact each other at the convex portion.
  • the lower die can be pressed to the upper die with the inner wall, the convex portion, and the outer wall being arranged between the lower die and the upper die. Therefore, the lower die is reliably positioned at substantially the same position as that of the upper die. Therefore, it is possible to prevent variations in the shape of the cross section of the axial-direction center portion of the torsion beam.
  • a space having a width equivalent to a height of the convex portion is formed between the outer wall and the inner wall.
  • the torsional rigidity of the torsion beam can be easily set to a predetermined value, and the shear center position can be easily set to a predetermined position by setting the height of the convex portion considering the torsional rigidity and the shear center position of the torsion beam.
  • the outer wall and the inner wall are in contact with each other at the convex portion. Accordingly, a contact area between the outer wall and the inner wall is extremely small, as compared to a case where an outer wall and an inner wall are in surface contact with each other. Therefore, it is possible to suppress occurrence of abnormal noise when the torsion beam is twisted.
  • the convex portion includes plural protrusions that are arranged at predetermined intervals in an axial direction of the torsion beam.
  • a contact area between the outer wall and the inner wall is small, for example, as compared to a case where an outer wall and an inner wall are continuously in contact with each other along the axial direction of the torsion beam. Therefore, it is possible to suppress occurrence of abnormal noise when the torsion beam is twisted.
  • the plural protrusions are arranged at the predetermined intervals in the axial direction of the torsion beam. Accordingly, although the plural protrusions are provided, the shape of the cross section of the axial-direction intermediate portion of the torsion beam is not greatly changed on the whole. Therefore, the torsional rigidity and the shear center of the torsion beam are prevented from being sharply changed.
  • each of the plural protrusions is formed so as to have a substantially conical shape by plastically deforming the outer wall, and the plural protrusions are arranged on one straight line along the axial direction of the torsion beam.
  • the contact area between the outer wall and the inner wall is made even smaller, it is possible to suppress occurrence of abnormal noise even more effectively when the torsion beam is twisted.
  • the protrusions can be used for positioning of the torsion beam when the torsion beam is formed, and when the torsion beam is connected to the trailing arms. In this case, there is an advantage that a specific jig for positioning of the torsion beam is not necessary.
  • the invention also provides a vehicle comprising the torsion beam suspension apparatus wherein the torsion beam extends in a width direction of the vehicle.
  • FIG. 1 is a perspective view showing a torsion beam suspension apparatus according to an embodiment of the invention
  • FIG. 2 is a perspective view showing an axial-direction intermediate portion of the torsion beam shown in FIG. 1 ;
  • FIG. 3 is a cross sectional view showing the axial-direction intermediate portion of the torsion beam shown in FIG. 1;
  • FIG. 4 is a perspective view showing an axial-direction intermediate portion of a torsion beam according to a modified example of the embodiment of the invention.
  • FIG. 1 shows an entire torsion beam suspension apparatus according to the embodiment of the invention.
  • the torsion beam suspension apparatus includes a pair of right and left trailing arms 10, 10; and a torsion beam 20.
  • Each of the trailing arms 10, 10 is formed of a curved pipe having a cylindrical shape. Front end portions of the trailing arms 10, 10 are fitted to a vehicle body BD via bushes 11, 11 such that the trailing arms 10, 10 can be rotated around a substantially horizontal axis. Rear end portions of the trailing arms 10, 10 are fitted to wheels W, W, respectively, via wheel-side members such as carriers (not shown).
  • Spring seats 12, 12 are welded to rear inner walls of the trailing arms 10, 10, respectively. Bottom walls of the spring seats 12, 12 support coil springs 13, 13, respectively. Upper ends of the coil springs 13, 13 support the vehicle body BD. Shock absorbers 14, 14 are provided behind the coil springs 13, 13, respectively. The shock absorbers 14, 14 are rotatably supported by brackets welded to the trailing arms 10, 10, via support rings at lower ends of the shock absorbers 14, 14. Upper ends of the shock absorbers 14, 14 support the vehicle body BD.
  • the torsion beam 20 extends in a width direction of the vehicle.
  • the torsion beam 20 is formed of a pipe having a cylindrical shape.
  • An axial-direction center portion 21 of the torsion beam 20 is pressed so as to have a double wall having a substantially V-shape cross section (refer to FIG. 2).
  • Axial-direction outer portions 22, 22 of the torsion beam 20 are formed so as to have a cylindrical shape, and to have a slightly deformed circle cross section.
  • Connection portions 22a, 22a are formed at both ends of the torsion beam 20.
  • the connection portions 22a, 22a are cut into predetermined shapes so as to be fitted to outer peripheral surfaces of intermediate portions of the trailing arms 10, 10, respectively.
  • the torsion beam 20 is connected to the trailing arms 10, 10 at the connection portions 22a, 22a, respectively, by welding or the like.
  • the double wall includes an outer wall 21a and an inner wall 21b, as shown in FIG. 2 and FIG. 3.
  • the outer wall 21a and the inner wall 21b are pressed so that an inter- wall space 21c having a substantially uniform width is formed between the outer wall 21a and the inner wall 21b from a top portion to each of intermediate portions on a front side and on a rear side.
  • the outer wall 21a and the inner wall 21b are connected with each other at both end portions on the front side and on the rear side such that end portion spaces 2 Id, 21d are formed at the both end portions, and each of the both end portions has a circular arc shape.
  • Each of the end portion spaces 2 Id, 21d is larger than the inter- wall space 21c.
  • the end portion spaces 2 Id, 21 d are continuous with the inter-wall space 21 c.
  • a width of each of the end portion spaces 2 Id, 21d is increased toward the corresponding end portion on the front side or on the rear side.
  • a width of each of the inter- wall space 21c and the end portion spaces 2 Id, 2 Id is set to a predetermined value such that torsional rigidity of the torsion beam 20 become a predetermined value and a shear center position S becomes a predetermined position when the right and left wheels W, W are displaced to opposite phases (in vertically opposite directions) and the torsion beam 20 is twisted through the trailing arms 10.
  • Plural protrusions 2 IaI are formed at predetermined intervals on one straight line along the axial direction of the torsion beam 20 on each of a front surface and a rear surface of the outer wall 21a.
  • Each of the protrusions 21al is formed by plastically forming a depressed portion having a substantially conical shape on the outer wall 21a.
  • Each of the protrusions 21a protrudes toward the inner wall 21b. After the axial-direction intermediate portion 21a of the torsion beam 20 is pressed, the protrusions 21al on the outer wall 21a are in contact with the inner wall 21b. That is, since the protrusions 2 IaI on the outer wall 21a are in contact with the inner wall 21b, the inter- wall space 21c is formed.
  • the width of the inter- wall space 21c is specified by a height of the protrusions 21 a 1.
  • the protrusions 2 IaI are formed in advance in a portion of a pipe constituting the outer wall 21a.
  • the lower die is moved toward the upper die until the portion of the pipe constituting the outer wall 21a and the portion of the pipe constituting the inner wall 21b contact each other at the protrusions 2 IaI.
  • the axial-direction intermediate portion 21 of the torsion beam 20 is formed so as to have a substantially V-shape cross section.
  • inter- wall space 21c having the width equivalent to the height of the protrusions 2 IaI, and the end portion spaces 2 Id, 2 Id having the predetermined width are formed between the outer wall 21a and the inner wall 21b that are formed by pressing the pipe.
  • the lower die when the torsion beam 20 is formed, the lower die can be pressed to the upper die with the inner wall 21b, the protrusions 2 IaI, and the outer wall 21a being arranged between the lower die and the upper die. Therefore, the lower die is reliably positioned at substantially the same position as that of the upper die. Therefore, it is possible to prevent variations in the shape of the cross section of the axial-direction center portion 21 of the torsion beam 20.
  • the torsional rigidity of the torsion beam 20 can be easily set to the predetermined value, and the shear center position S can be easily set to the predetermined position.
  • the plural protrusions 21 on the outer wall 21a are in contact with the inner wall 21b.
  • the plural protrusions 21 al are arranged at the predetermined intervals in the axial direction of the torsion beam 20. Therefore, although the plural protrusions 2 IaI are provided, the shape of the cross section of the axial-direction intermediate portion of the torsion beam 20 is not greatly changed on the whole. Thus, the torsional rigidity and the shear center of the torsion beam 20 are prevented from being sharply changed.
  • the plural protrusions 2 IaI are arranged on one straight line along the axial direction of the torsion beam 20 on each of the front surface and the rear surface of the outer wall 21a.
  • the protrusions 2 IaI can be used for positioning of the torsion beam 20 when the torsion beam 20 is formed, and when the torsion beam 20 is connected to the trailing arms 10, 10. In this case, a specific jig for positioning of the torsion beam 20 is not necessary.
  • each protrusion may have an oval shape or an oblong hole shape.
  • protrusions may be arranged in a zigzag manner along the axial direction of the torsion beam 20. Also, for example, as shown in FIG.
  • each of protrusions 21a2 having a continuous linear shape may be formed on one straight line along the axial direction of the torsion beam 20.
  • the inter- wall space is formed, as well as in the aforementioned embodiment. Therefore, it is possible to easily set the torsional rigidity and the shear center position of the torsion beam, and to suppress occurrence of abnormal noise when the torsion beam is twisted.
  • the protrusions 2 IaI are formed in the portion of the pipe constituting the outer wall 21a.
  • protrusions may be formed in the portion of the pipe constituting the inner wall 21b. In this case as well, it is possible to obtain the same effect as the effect obtained in each of the aforementioned embodiment and the modified examples.
  • the protrusions are formed by plastically deforming the pipe.
  • the invention is not limited to the protrusions that are formed in this manner.
  • a protrusion member equivalent to the aforementioned protrusion may be fitted to an outer wall and/or an inner wall such that the outer wall and the inner wall are in contact with each other at the protrusion member. In this case as well, it is possible to obtain the same effect as the effect obtained in each of the aforementioned embodiment and the modified examples.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Body Suspensions (AREA)

Abstract

An axial-direction intermediate portion (21) of a torsion beam is pressed so as to have a substantially V-shape cross section. The axial direction intermediate portion (21) includes an outer wall (21a) and an inner wall (21b). Plural protrusions (21a1 ) (convex portions) formed on the outer wall (21a) are in contact with the inner wall (21b). The plural protrusions (21a1) are arranged at predetermined intervals on one straight line along an axial direction of the torsion beam. An inter-wall space (21c) having a width equivalent to a height of the protrusions (21a1) is formed between the outer wall (21a) and the inner wall (21b). The width of the inter-wall space (21c) is set to a predetermined value, considering torsional rigidity and a shear center position of the torsion beam. Since the outer wall (21a) and the inner wall (21b) are in contact with each other at the protrusions (21a1), it is possible to suppress occurrence of abnormal noise that is caused when the outer wall (21a) and the inner wall (21b) slidably contact each other.

Description

TORSION BEAM SUSPENSION APPARATUS
BACKGROUND OF THE INVENTION
1. Field of the Invention The invention relates to a torsion beam suspension apparatus.
2. Description of the Related Art
As disclosed in Japanese Patent Application Publication No. JP-A-2001-321846 and Japanese Patent Application Publication No. JP-A-2001-146110, a torsion beam suspension apparatus is known, in which a torsion beam is formed of a pipe having a cylindrical shape, and an axial-direction intermediate portion of the pipe is pressed so as to have a substantially V-shape cross section or a substantially U-shape cross section. In a torsion beam, a space (internal space) having a predetermined width is formed between an outer wall and an inner wall that constitute a double wall formed by pressing the pipe. In another torsion beam, an outer wall and an inner wall are in contact with each other, and a space is formed at each of both end portions having a circular arc shape, at which the outer wall and the inner wall are connected to each other.
In these torsion beams, it is possible to change torsional rigidity and a shear center position (torsional center position) when right and left wheels are displaced to opposite phases (in opposite directions) and the torsion beam is twisted, by adjusting a width of the space to a predetermined value, and changing the shape of the cross section. In a case where the torsional rigidity is changed, roll stiffness of the vehicle is changed. In a case where the shear center position is changed, a displacement amount and a displacement direction of trailing arms and the like are changed when the torsion beam is twisted. Thus a steering characteristic of the vehicle is changed.
Each of the aforementioned torsion beams is generally formed by press forming using an upper die and a lower die. In a case where the former torsion beam is formed, since the space having a predetermined width needs to be formed between the outer wall and the inner wall, the lower die cannot be pressed to the upper die during a forming process. That is, positioning of the lower die with respect to the upper die is likely to be insufficiently accurate. This causes variations in the shape of the cross section of the torsion beam. As a result, it is difficult to set the torsional rigidity to a predetermined value, and to set the shear center position to a predetermined position. Meanwhile, in a case where the latter torsion beam is formed, since the outer wall and the inner wall are in contact with each other except the both end portions, it is possible to prevent the aforementioned variations in the shape of the cross section of the torsion beam. In this case, however, the outer wall and the inner wall are in surface contact with each other, the outer wall and the inner wall slidably contact each other when the torsion beam is twisted, which causes abnormal noise.
SUMMARY OF THE INVENTION An embodiment of the invention seeks to provide a torsion beam suspension apparatus in which torsional rigidity and a shear center position of a torsion beam can be easily set to a predetermined value and a predetermined position, respectively, and occurrence of abnormal noise can be suppressed when the torsion beam is twisted. According to an aspect of the invention, a torsion beam suspension apparatus includes a torsion beam which, in use, extends in a width direction of a vehicle, whose one end is connected to one of paired right and left trailing arms, and whose other end is connected to the other of the paired right and left trailing arms. In the torsion beam suspension apparatus, the torsion beam is formed of a pipe having a cylindrical shape; an axial-direction intermediate portion of the pipe is pressed so as to have a substantially V-shape cross section or a substantially U-shape cross section; a convex portion is formed on at least one of an outer wall and an inner wall that constitute a double wall formed by pressing the pipe, and the convex portion protrudes from one of the outer wall and the inner wall on which the convex portion is formed to the other of the outer wall and the inner wall on which the convex portion is not formed; and the outer wall and the inner wall are in contact with each other at the convex portion. When the torsion beam is formed, for example, the lower die is moved toward the upper die until a portion of the pipe constituting the outer wall and a portion of the pipe constituting the inner wall contact each other at the convex portion. In this case, the lower die can be pressed to the upper die with the inner wall, the convex portion, and the outer wall being arranged between the lower die and the upper die. Therefore, the lower die is reliably positioned at substantially the same position as that of the upper die. Therefore, it is possible to prevent variations in the shape of the cross section of the axial-direction center portion of the torsion beam. At this time, a space having a width equivalent to a height of the convex portion is formed between the outer wall and the inner wall. Thus, the torsional rigidity of the torsion beam can be easily set to a predetermined value, and the shear center position can be easily set to a predetermined position by setting the height of the convex portion considering the torsional rigidity and the shear center position of the torsion beam. Also, the outer wall and the inner wall are in contact with each other at the convex portion. Accordingly, a contact area between the outer wall and the inner wall is extremely small, as compared to a case where an outer wall and an inner wall are in surface contact with each other. Therefore, it is possible to suppress occurrence of abnormal noise when the torsion beam is twisted. According to an embodiment of the invention, the convex portion includes plural protrusions that are arranged at predetermined intervals in an axial direction of the torsion beam. With this configuration, a contact area between the outer wall and the inner wall is small, for example, as compared to a case where an outer wall and an inner wall are continuously in contact with each other along the axial direction of the torsion beam. Therefore, it is possible to suppress occurrence of abnormal noise when the torsion beam is twisted. In this case, the plural protrusions are arranged at the predetermined intervals in the axial direction of the torsion beam. Accordingly, although the plural protrusions are provided, the shape of the cross section of the axial-direction intermediate portion of the torsion beam is not greatly changed on the whole. Therefore, the torsional rigidity and the shear center of the torsion beam are prevented from being sharply changed.
According to another embodiment of the invention, each of the plural protrusions is formed so as to have a substantially conical shape by plastically deforming the outer wall, and the plural protrusions are arranged on one straight line along the axial direction of the torsion beam. With this configuration, the contact area between the outer wall and the inner wall is made even smaller, it is possible to suppress occurrence of abnormal noise even more effectively when the torsion beam is twisted. Also, since the plural protrusions are arranged on one straight line along the axial direction of the torsion beam, the protrusions can be used for positioning of the torsion beam when the torsion beam is formed, and when the torsion beam is connected to the trailing arms. In this case, there is an advantage that a specific jig for positioning of the torsion beam is not necessary.
The invention also provides a vehicle comprising the torsion beam suspension apparatus wherein the torsion beam extends in a width direction of the vehicle.
BRIEF DESCRIPTION OF THE DRAWINGS
A better understanding of the invention will become apparent from the following illustrative description of embodiments with reference to the accompanying drawings, wherein like numerals are used to represent like elements and wherein:
FIG. 1 is a perspective view showing a torsion beam suspension apparatus according to an embodiment of the invention;
FIG. 2 is a perspective view showing an axial-direction intermediate portion of the torsion beam shown in FIG. 1 ;
FIG. 3 is a cross sectional view showing the axial-direction intermediate portion of the torsion beam shown in FIG. 1; and
FIG. 4 is a perspective view showing an axial-direction intermediate portion of a torsion beam according to a modified example of the embodiment of the invention.
DETAILED DESCRIPTION OF EMBODIMENTS
Hereinafter, an embodiment of the invention will be described with reference to the drawings. FIG. 1 shows an entire torsion beam suspension apparatus according to the embodiment of the invention. The torsion beam suspension apparatus includes a pair of right and left trailing arms 10, 10; and a torsion beam 20.
Each of the trailing arms 10, 10 is formed of a curved pipe having a cylindrical shape. Front end portions of the trailing arms 10, 10 are fitted to a vehicle body BD via bushes 11, 11 such that the trailing arms 10, 10 can be rotated around a substantially horizontal axis. Rear end portions of the trailing arms 10, 10 are fitted to wheels W, W, respectively, via wheel-side members such as carriers (not shown).
Spring seats 12, 12 are welded to rear inner walls of the trailing arms 10, 10, respectively. Bottom walls of the spring seats 12, 12 support coil springs 13, 13, respectively. Upper ends of the coil springs 13, 13 support the vehicle body BD. Shock absorbers 14, 14 are provided behind the coil springs 13, 13, respectively. The shock absorbers 14, 14 are rotatably supported by brackets welded to the trailing arms 10, 10, via support rings at lower ends of the shock absorbers 14, 14. Upper ends of the shock absorbers 14, 14 support the vehicle body BD.
The torsion beam 20 extends in a width direction of the vehicle. The torsion beam 20 is formed of a pipe having a cylindrical shape. An axial-direction center portion 21 of the torsion beam 20 is pressed so as to have a double wall having a substantially V-shape cross section (refer to FIG. 2). Axial-direction outer portions 22, 22 of the torsion beam 20 are formed so as to have a cylindrical shape, and to have a slightly deformed circle cross section. Connection portions 22a, 22a are formed at both ends of the torsion beam 20. The connection portions 22a, 22a are cut into predetermined shapes so as to be fitted to outer peripheral surfaces of intermediate portions of the trailing arms 10, 10, respectively. The torsion beam 20 is connected to the trailing arms 10, 10 at the connection portions 22a, 22a, respectively, by welding or the like.
The double wall includes an outer wall 21a and an inner wall 21b, as shown in FIG. 2 and FIG. 3. The outer wall 21a and the inner wall 21b are pressed so that an inter- wall space 21c having a substantially uniform width is formed between the outer wall 21a and the inner wall 21b from a top portion to each of intermediate portions on a front side and on a rear side. The outer wall 21a and the inner wall 21b are connected with each other at both end portions on the front side and on the rear side such that end portion spaces 2 Id, 21d are formed at the both end portions, and each of the both end portions has a circular arc shape. Each of the end portion spaces 2 Id, 21d is larger than the inter- wall space 21c. The end portion spaces 2 Id, 21 d are continuous with the inter-wall space 21 c. A width of each of the end portion spaces 2 Id, 21d is increased toward the corresponding end portion on the front side or on the rear side.
A width of each of the inter- wall space 21c and the end portion spaces 2 Id, 2 Id is set to a predetermined value such that torsional rigidity of the torsion beam 20 become a predetermined value and a shear center position S becomes a predetermined position when the right and left wheels W, W are displaced to opposite phases (in vertically opposite directions) and the torsion beam 20 is twisted through the trailing arms 10.
Plural protrusions 2 IaI are formed at predetermined intervals on one straight line along the axial direction of the torsion beam 20 on each of a front surface and a rear surface of the outer wall 21a. Each of the protrusions 21al is formed by plastically forming a depressed portion having a substantially conical shape on the outer wall 21a. Each of the protrusions 21a protrudes toward the inner wall 21b. After the axial-direction intermediate portion 21a of the torsion beam 20 is pressed, the protrusions 21al on the outer wall 21a are in contact with the inner wall 21b. That is, since the protrusions 2 IaI on the outer wall 21a are in contact with the inner wall 21b, the inter- wall space 21c is formed. The width of the inter- wall space 21c is specified by a height of the protrusions 21 a 1.
In the aforementioned embodiment thus configured, in a case where the torsion beam 20 is formed, first, the protrusions 2 IaI are formed in advance in a portion of a pipe constituting the outer wall 21a. Next, for example, the lower die is moved toward the upper die until the portion of the pipe constituting the outer wall 21a and the portion of the pipe constituting the inner wall 21b contact each other at the protrusions 2 IaI. Thus, the axial-direction intermediate portion 21 of the torsion beam 20 is formed so as to have a substantially V-shape cross section. In addition, the inter- wall space 21c having the width equivalent to the height of the protrusions 2 IaI, and the end portion spaces 2 Id, 2 Id having the predetermined width are formed between the outer wall 21a and the inner wall 21b that are formed by pressing the pipe.
In the aforementioned embodiment, when the torsion beam 20 is formed, the lower die can be pressed to the upper die with the inner wall 21b, the protrusions 2 IaI, and the outer wall 21a being arranged between the lower die and the upper die. Therefore, the lower die is reliably positioned at substantially the same position as that of the upper die. Therefore, it is possible to prevent variations in the shape of the cross section of the axial-direction center portion 21 of the torsion beam 20. Thus, the torsional rigidity of the torsion beam 20 can be easily set to the predetermined value, and the shear center position S can be easily set to the predetermined position. Also, in the aforementioned embodiment, the plural protrusions 21 on the outer wall 21a are in contact with the inner wall 21b. Accordingly, a contact area between the outer wall 21a and the inner wall 21b is extremely small, as compared to a case where an outer wall and an inner wall are in surface contact with each other. Therefore, it is possible to suppress occurrence of abnormal noise when the torsion beam 20 is twisted. In the aforementioned embodiment, the plural protrusions 21 al are arranged at the predetermined intervals in the axial direction of the torsion beam 20. Therefore, although the plural protrusions 2 IaI are provided, the shape of the cross section of the axial-direction intermediate portion of the torsion beam 20 is not greatly changed on the whole. Thus, the torsional rigidity and the shear center of the torsion beam 20 are prevented from being sharply changed.
Also, in the aforementioned embodiment, the plural protrusions 2 IaI are arranged on one straight line along the axial direction of the torsion beam 20 on each of the front surface and the rear surface of the outer wall 21a. Thus, the protrusions 2 IaI can be used for positioning of the torsion beam 20 when the torsion beam 20 is formed, and when the torsion beam 20 is connected to the trailing arms 10, 10. In this case, a specific jig for positioning of the torsion beam 20 is not necessary.
Although the embodiment of the invention has been described, the invention is not limited to the aforementioned embodiment, and various modifications can be made without departing from the true spirit of the invention.
For example, in the aforementioned embodiment, the plural protrusions 2 IaI in the substantially conical shape, which serve as convex portions, are formed at the predetermined intervals on one straight line along the axial direction of the torsion beam 20 on the outer wall 21a. However, the invention is not limited to this configuration. For example, the shape and the axial-direction length of each protrusion may be appropriately changed. That is, for example, each protrusion may have an oval shape or an oblong hole shape. Also, for example, protrusions may be arranged in a zigzag manner along the axial direction of the torsion beam 20. Also, for example, as shown in FIG. 4, each of protrusions 21a2 having a continuous linear shape may be formed on one straight line along the axial direction of the torsion beam 20. In each of these cases, the inter- wall space is formed, as well as in the aforementioned embodiment. Therefore, it is possible to easily set the torsional rigidity and the shear center position of the torsion beam, and to suppress occurrence of abnormal noise when the torsion beam is twisted.
Also, in each of the aforementioned embodiment and various modified examples, the protrusions 2 IaI are formed in the portion of the pipe constituting the outer wall 21a. However, in addition to the protrusions 2 IaI, or instead of the protrusions 2 IaI, protrusions may be formed in the portion of the pipe constituting the inner wall 21b. In this case as well, it is possible to obtain the same effect as the effect obtained in each of the aforementioned embodiment and the modified examples.
Also, in each of the aforementioned embodiment and the various modified examples, the protrusions are formed by plastically deforming the pipe. However, the invention is not limited to the protrusions that are formed in this manner. For example, a protrusion member equivalent to the aforementioned protrusion may be fitted to an outer wall and/or an inner wall such that the outer wall and the inner wall are in contact with each other at the protrusion member. In this case as well, it is possible to obtain the same effect as the effect obtained in each of the aforementioned embodiment and the modified examples.

Claims

CLAIMS:
1. A torsion beam suspension apparatus including a torsion beam which, in use, extends in a width direction of a vehicle, whose one end is connected to one of paired right and left trailing arms, and whose other end is connected to the other of the paired right and left trailing arms, wherein: the torsion beam is formed of a pipe having a cylindrical shape; an axial-direction intermediate portion of the pipe is pressed so as to have a substantially V-shape cross section or a substantially U-shape cross section; a convex portion is formed on at least one of an outer wall and an inner wall that constitute a double wall formed by pressing the pipe, and the convex portion protrudes from one of the outer wall and the inner wall on which the convex portion is formed to the other of the outer wall and the inner wall on which the convex portion is not formed; and the outer wall and the inner wall are in contact with each other at the convex portion.
2. The torsion beam suspension apparatus according to claim 1, wherein the convex portion includes plural protrusions that are arranged at predetermined intervals in an axial direction of the torsion beam.
3. The torsion beam suspension apparatus according to claim 2, wherein each of the plural protrusions is formed so as to have a substantially conical shape by plastically deforming the outer wall, and the plural protrusions are arranged on one straight line along the axial direction of the torsion beam.
4. The torsion beam suspension apparatus according to claim 2, wherein the convex portion includes a protrusion which has a continuous linear shape, and which is arranged on one straight line along the axial direction of the torsion beam.
5. A vehicle comprising a torsion beam suspension apparatus according to any preceding claim extending width- wise of the vehicle.
PCT/IB2005/003225 2004-10-07 2005-09-29 Torsion beam suspension apparatus Ceased WO2006038121A1 (en)

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DE602005009001T DE602005009001D1 (en) 2004-10-07 2005-09-29 COMPOSITE STEERING SUSPENSION
EP05794320A EP1796927B1 (en) 2004-10-07 2005-09-29 Torsion beam suspension apparatus
US10/570,142 US7478820B2 (en) 2004-10-07 2005-09-29 Torsion beam suspension apparatus

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JP2004294593A JP4211722B2 (en) 2004-10-07 2004-10-07 Torsion beam suspension system

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007062220A1 (en) 2007-12-21 2009-06-25 GM Global Technology Operations, Inc., Detroit Cross beam for torsion beam axle of motor vehicle, has double-walled profile with inner and outer walls that are spaced from each other, where inner and outer walls are exchanged from each other into bar sections
EP2168789A1 (en) * 2008-09-29 2010-03-31 Renault s.a.s. Flexible rear axle with hollow cross-bar and cross-member and corresponding vehicle
DE102008052554A1 (en) * 2008-10-21 2010-04-29 Benteler Automobiltechnik Gmbh Cross member of a vehicle axle
GB2492220A (en) * 2011-06-22 2012-12-26 Gm Global Tech Operations Inc Vehicle with fuel filler line and rear compound crank arrangement
FR2985221A1 (en) * 2011-12-28 2013-07-05 Peugeot Citroen Automobiles Sa Rear wheel-axle unit for car, has deformable cross-piece comprising profile including constant section, where profile is realized by pultrusion processing of continuous type composite material
EP2861438A4 (en) * 2012-06-15 2015-04-22 Magna Int Inc LIGHT TUBULAR DEFORMED BEAM
TWI486267B (en) * 2013-02-01 2015-06-01 Nippon Steel & Sumitomo Metal Corp Torsion beam, torsion beam assembly and torsion beam suspension

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070246904A1 (en) * 2005-09-12 2007-10-25 Satoshi Murata Torsion-Beam-Type Suspension Apparatus
JP2008195155A (en) * 2007-02-09 2008-08-28 Futaba Industrial Co Ltd Torsion beam suspension
EP2020314A1 (en) * 2007-08-01 2009-02-04 GM Global Technology Operations, Inc. Driven motor vehicle twist beam rear axle
RU2487802C2 (en) * 2007-09-05 2013-07-20 Магна Интернэшнл Инк. Tubular transverses girder for vehicle rear axle and rear axle with such girder
KR20100029463A (en) * 2008-09-08 2010-03-17 현대자동차주식회사 Torsion beam type suspension system of vehicle
US7946600B2 (en) * 2008-09-17 2011-05-24 Honda Motor Co., Ltd. Torsion beam type rear wheel suspension system
CA2644464C (en) * 2008-10-17 2010-04-20 Arcelormittal Tubular Products Canada Inc. Twist-axle of variable wall thickness
WO2010124115A1 (en) * 2009-04-22 2010-10-28 V-Vehicle Company Shear center raising twist axle with internal and tunable transitioning gussets
AU2010312247A1 (en) * 2009-10-30 2012-04-19 Magna International Inc. Torsion beam of twist axle
CN102529635A (en) * 2012-02-15 2012-07-04 江苏九龙汽车制造有限公司 Automobile rear torsion beam
CA2909707A1 (en) * 2013-04-16 2014-10-23 Magna International Inc. Twist beam with joined inner and outer parts
CN103949563B (en) * 2014-04-10 2015-10-21 重庆天人汽车车身制造有限公司 Car tubulose V-type torsion beam Sheet Metal Forming Technology
US8942727B1 (en) 2014-04-11 2015-01-27 ACR Development, Inc. User Location Tracking
US9413707B2 (en) * 2014-04-11 2016-08-09 ACR Development, Inc. Automated user task management
DE102014109453A1 (en) 2014-07-07 2016-01-07 Benteler Automobiltechnik Gmbh Method for producing a torsion profile from a tubular hollow profile and torsion profile
DE102014109680A1 (en) * 2014-07-10 2016-01-14 Benteler Automobiltechnik Gmbh Method for producing a torsion profile from a board and torsion profile
WO2017169733A1 (en) * 2016-03-30 2017-10-05 新日鐵住金株式会社 Torsion beam manufacturing method and torsion beam manufacturing device
CN107310342B (en) * 2016-04-26 2020-05-22 宝山钢铁股份有限公司 Variable cross-section line hydraulic expansion tube torsion beam
KR102310505B1 (en) 2017-06-28 2021-10-08 현대자동차주식회사 Coupled Torsion Beam Axle Induced Buckling and Vehicle thereby
DE102018100989B3 (en) 2018-01-17 2019-02-14 Benteler Automobiltechnik Gmbh Method for producing a bent torsion profile and torsion profile
DE102018205877B3 (en) * 2018-04-18 2019-10-24 Ford Global Technologies, Llc Axle for a vehicle
KR102245234B1 (en) 2018-11-30 2021-04-29 주식회사 포스코 Manuacturing method for torsion beam
JP2021126949A (en) * 2020-02-12 2021-09-02 株式会社エフテック Torsion beam
JP7441679B2 (en) * 2020-03-05 2024-03-01 株式会社エフテック Torsion beam suspension
CN115246294A (en) * 2021-04-26 2022-10-28 株式会社 F.泰克 torsion beam
CN117021840A (en) * 2023-07-19 2023-11-10 奇瑞汽车股份有限公司 Rear axle assembly and vehicle

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1036678A2 (en) * 1999-03-13 2000-09-20 ThyssenKrupp Automotive AG Twist-beam rear axle
JP2001146110A (en) * 1999-09-02 2001-05-29 Benteler Ag Cross beams as components of pivot beam axles
JP2001321846A (en) * 2000-03-09 2001-11-20 Toyota Motor Corp Manufacturing method of irregularly shaped tubular body and axle beam for torsion beam
DE10054692A1 (en) * 2000-11-03 2002-05-16 Benteler Automobiltechnik Gmbh Cross-member for vehicle is connected to side members and consists of two shells, fitted one inside the other in inverted U or V shape, and connected on either side by longitudinal welds
DE10102759A1 (en) * 2001-01-23 2002-07-25 Volkswagen Ag Composite suspension arm rear axle for motor vehicles has longitudinal profiles with hollow chamber and walls separated by full-length gap
US20030044632A1 (en) * 2001-08-11 2003-03-06 Gerhard Schonleber Sheet metal profile support, in particular for automotive construction, and method for producing it
FR2851958A1 (en) * 2003-03-06 2004-09-10 Auto Chassis Int Snc FLEXIBLE AXLE FOR MOTOR VEHICLE WITH ADDED ANTI-TILT ELEMENT, MOTOR VEHICLE AND MANUFACTURING METHOD THEREFOR

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1618611A (en) * 1925-01-07 1927-02-22 Emsco Derrick & Equip Co Galvanized pipe and method of making same
US3144069A (en) * 1953-11-12 1964-08-11 Johns Manville Metal sheathed insulating blanket
US3724153A (en) * 1971-01-19 1973-04-03 Budd Co Joint construction
US4512700A (en) * 1983-02-23 1985-04-23 Greif Bros. Corporation Nesting drums-method of making the same
US4739918A (en) * 1987-02-06 1988-04-26 Stokes Bennie J Method for stabilization of header plate flange and end tank wall
US5409255A (en) * 1990-08-10 1995-04-25 Benteler Industries, Inc. Twist beam axle
JPH05278424A (en) * 1992-01-22 1993-10-26 Benteler Ind Inc Twist beam axle
JPH07186654A (en) * 1993-12-24 1995-07-25 Yorozu:Kk Torsion beam type suspension and its manufacturing method
JP3231185B2 (en) * 1994-07-15 2001-11-19 日本精工株式会社 Rolling bearing unit with rotation speed detector
JP3546564B2 (en) * 1995-03-24 2004-07-28 トヨタ自動車株式会社 Twist beam suspension
US5958603A (en) * 1997-06-09 1999-09-28 Atd Corporation Shaped multilayer metal foil shield structures and method of making
AU724423B2 (en) * 1997-06-09 2000-09-21 Sevex North America, Inc. Shaped multilayer metal foil shield structures and method of making
DE19820415C1 (en) * 1998-05-07 1999-09-16 Benteler Werke Ag Method of forming vehicle axle tube into U-shaped profile
CZ296802B6 (en) * 2000-05-31 2006-06-14 Benteler Ag Twist-beam axle with transverse torsion bar
US6533300B1 (en) * 2000-06-02 2003-03-18 Oxford Suspension, Inc. Trailing twist axle and method of manufacture
DE20101602U1 (en) * 2001-01-31 2001-04-05 Benteler Automobiltechnik GmbH & Co. KG, 33104 Paderborn Twist beam axle
US7377041B2 (en) * 2003-06-18 2008-05-27 Donghee Industrial Co., Ltd. Torsion beam type suspension, method for forming torsion beam, and apparatus for forming torsion beam
JP2005162080A (en) 2003-12-04 2005-06-23 Nissan Motor Co Ltd Torsion beam suspension
US7556272B2 (en) * 2005-09-06 2009-07-07 Gm Global Technology Operations, Inc. Twist axle suspensions
US20070069496A1 (en) * 2005-09-27 2007-03-29 Rinehart Ronald A Torsion beam suspension member

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1036678A2 (en) * 1999-03-13 2000-09-20 ThyssenKrupp Automotive AG Twist-beam rear axle
JP2001146110A (en) * 1999-09-02 2001-05-29 Benteler Ag Cross beams as components of pivot beam axles
JP2001321846A (en) * 2000-03-09 2001-11-20 Toyota Motor Corp Manufacturing method of irregularly shaped tubular body and axle beam for torsion beam
DE10054692A1 (en) * 2000-11-03 2002-05-16 Benteler Automobiltechnik Gmbh Cross-member for vehicle is connected to side members and consists of two shells, fitted one inside the other in inverted U or V shape, and connected on either side by longitudinal welds
DE10102759A1 (en) * 2001-01-23 2002-07-25 Volkswagen Ag Composite suspension arm rear axle for motor vehicles has longitudinal profiles with hollow chamber and walls separated by full-length gap
US20030044632A1 (en) * 2001-08-11 2003-03-06 Gerhard Schonleber Sheet metal profile support, in particular for automotive construction, and method for producing it
FR2851958A1 (en) * 2003-03-06 2004-09-10 Auto Chassis Int Snc FLEXIBLE AXLE FOR MOTOR VEHICLE WITH ADDED ANTI-TILT ELEMENT, MOTOR VEHICLE AND MANUFACTURING METHOD THEREFOR

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 22 9 March 2001 (2001-03-09) *
PATENT ABSTRACTS OF JAPAN vol. 2002, no. 03 3 April 2002 (2002-04-03) *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007062220A1 (en) 2007-12-21 2009-06-25 GM Global Technology Operations, Inc., Detroit Cross beam for torsion beam axle of motor vehicle, has double-walled profile with inner and outer walls that are spaced from each other, where inner and outer walls are exchanged from each other into bar sections
EP2168789A1 (en) * 2008-09-29 2010-03-31 Renault s.a.s. Flexible rear axle with hollow cross-bar and cross-member and corresponding vehicle
FR2936444A1 (en) * 2008-09-29 2010-04-02 Renault Sas SOFT REAR AXLE AXLE AND HOLLOW TRAVERSE AND CORRESPONDING VEHICLE
DE102008052554A1 (en) * 2008-10-21 2010-04-29 Benteler Automobiltechnik Gmbh Cross member of a vehicle axle
GB2492220A (en) * 2011-06-22 2012-12-26 Gm Global Tech Operations Inc Vehicle with fuel filler line and rear compound crank arrangement
FR2985221A1 (en) * 2011-12-28 2013-07-05 Peugeot Citroen Automobiles Sa Rear wheel-axle unit for car, has deformable cross-piece comprising profile including constant section, where profile is realized by pultrusion processing of continuous type composite material
EP2861438A4 (en) * 2012-06-15 2015-04-22 Magna Int Inc LIGHT TUBULAR DEFORMED BEAM
TWI486267B (en) * 2013-02-01 2015-06-01 Nippon Steel & Sumitomo Metal Corp Torsion beam, torsion beam assembly and torsion beam suspension

Also Published As

Publication number Publication date
EP1796927A1 (en) 2007-06-20
JP2006103570A (en) 2006-04-20
JP4211722B2 (en) 2009-01-21
CN1946580A (en) 2007-04-11
DE602005009001D1 (en) 2008-09-25
US7478820B2 (en) 2009-01-20
CN100457485C (en) 2009-02-04
US20070075518A1 (en) 2007-04-05
EP1796927B1 (en) 2008-08-13

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