JP5315141B2 - Tuning device for throttle valve in multiple throttle body - Google Patents

Description

  In the present invention, the valve shafts of two throttle valves that are rotatably supported by two adjacent throttle bodies are coaxially arranged, and the first lever fixed to one of the valve shafts has a rotation direction thereof. A first transmission wall facing the wall is formed, and the second lever fixed to the other valve shaft is opposed to each other along the rotational direction of the second lever with the first transmission wall in between A second transmission wall and a spring seat wall are formed, and the second transmission wall has a tuning bolt that contacts the first transmission wall when the first lever or the second lever is rotated in the opening direction of the corresponding throttle valve. A set spring that urges the first transmission wall in a contact direction with the tuning bolt is compressed between the first transmission wall and the spring seat wall. The same throttle valve in the multiple throttle body Apparatus relates to an improvement of.

  A throttle valve tuning apparatus in such a multiple throttle body is already known as disclosed in Japanese Patent Application Laid-Open No. H10-228707.

JP 2005-290995 A

  In such a throttle valve tuning device in a multiple throttle body, the opening and closing timings of the two throttle valves can be synchronized by adjusting the tuning bolt forward and backward with respect to the first transmission wall. However, in the conventional device, since the first and second transmission walls have many free ends, the rigidity of the first and second transmission walls is insufficient, and when the second valve shaft is driven to open and close from the first valve shaft, A slight delay may occur in the opening / closing operation of the throttle valve, and since the tuning bolt and the set spring are exposed, the synchronization of the two throttle valves may occur due to dust adhering to them.

  The present invention has been made in view of such circumstances, and effectively enhances the rigidity of the first and second transmission walls, prevents dust from adhering to the tuning bolt and the set spring, and prevents the adjacent throttle valves from interacting with each other. It is an object of the present invention to provide a throttle valve tuning device in a multiple throttle body that can always maintain the proper tuning of the throttle valve.

In order to achieve the above object, according to the present invention, a valve shaft of two throttle valves rotatably supported by two adjacent throttle bodies is arranged coaxially and fixed to one of the valve shafts. The first lever is formed with a first transmission wall facing the wall surface in the rotation direction, and the second lever fixed to the other valve shaft is disposed in the rotation direction of the second lever with the first transmission wall interposed therebetween. A second transmission wall and a spring seat wall are formed to face each other along the first and second walls, and the first lever or the second lever is rotated on the second transmission wall in the opening direction of the corresponding throttle valve. A tuning bolt that abuts against the transmission wall is screwed to the first transmission wall so as to be able to advance and retreat, and the first transmission wall is brought into contact with the tuning bolt between the first transmission wall and the spring seat wall. Multiple throttle body with a set spring urged against In the throttle valve tuning apparatus according to claim 1, the second transmission wall and the spring seat wall, an outer connecting wall that connects the radially outer ends thereof, and an inner connecting wall that connects the radially inner ends thereof. A side wall that connects the four walls of the second transmission wall, the spring seat wall, the outer connecting wall, and the inner connecting wall, and opens one side face facing the first lever and closes the other side face. to constitute a tuning box for accommodating the first transmission wall and a set spring, an open the cover wall that covers the one side surface of the tuning box, said first transmission wall in the direction along the said one of the valve shaft The first feature is that the cover wall and the first transmission wall are connected to the end edge portion on the side far from the side wall so as to form a T-shape .

  In addition to the first feature, the second feature of the present invention is that an electric motor that opens and closes all throttle valves is connected to one of the valve shafts.

  According to the first feature of the present invention, the rigidity of the first transmission wall is effectively enhanced by the cover wall connected to the first transmission wall. In addition, the second transmission wall and the spring seat wall that oppose the wall surfaces in cooperation with the outer connection wall, the inner connection wall, and the side wall constitute a highly rigid tuning box. Therefore, the first and second transmission walls are It is possible to efficiently transmit the transmission force to each other without bending, and to ensure the synchronized operation of the corresponding adjacent throttle valves.

  In addition, the tuning box accommodates the tuning bolt and the set spring, and its open surface is covered by a cover wall that reinforces the first transmission wall, so that rain water and dust can be prevented from entering the tuning box. It is possible to prevent a synchronization error due to dust or the like adhering to the spring.

  According to the second feature of the present invention, the rigidity of the first and second transmission walls is strengthened, so that the fully closed position of the throttle valve is sufficiently increased and the gap between the throttle valve and the inner peripheral surface of the intake passage is sufficiently increased. It can be set by a normal fully closed position restricting means so as to be narrowed, and even when a valve closing torque stronger than that of the electric motor is received, the throttle valve can be prevented from biting into the inner peripheral surface of the intake passage.

1 is a front view of a multiple throttle body for a motorcycle according to an embodiment of the present invention. FIG. 2 is a sectional view taken along line 2-2 in FIG. 1. The outline top view of the multiple throttle body. 4 is an enlarged cross section of 4 parts in FIG. FIG. 5 is a sectional view taken along line 5-5 of FIG. The disassembled perspective view of the principal part of the tuning apparatus in FIG. The part enlarged view of FIG. FIG. 8 is a cross-sectional view taken along line 8-8 in FIG.

  Embodiments of the present invention will be described below on the basis of preferred embodiments of the present invention shown in the accompanying drawings.

  An embodiment in which the present invention is applied to a 4-unit throttle body for a 4-cylinder engine mounted on a motorcycle will be described.

  1 to 3, the four throttle body T is formed by arranging four throttle bodies Ta to Td each having an intake passage 1 in parallel, and the first to fourth throttle bodies Ta to Call it Td. Each of the throttle bodies Ta to Td is formed by bolting an upstream body half 2 on the air cleaner (not shown) side and a downstream body half 3 on the intake port (not shown) side of the engine. Therefore, the upstream body halves 2 of the first to fourth throttle bodies Ta to Td are connected to each other by a connecting flange 4 formed integrally therewith.

  Each downstream body half 3 of No. 1 to No. 4 throttle bodies Ta to Td is rotatably supported by No. 1 to No. 2 valve shafts 5a to 5d arranged on the same axis. 1st to 4th throttle valves 6a to 6d to be opened and closed are attached. Between each of the first to fourth valve shafts 5a to 5d, a tuning device 7 for connecting the adjacent valve shafts to each other is provided.

  On the other hand, between the second and third throttle bodies Tb and Tc, on the other hand, on the second throttle body Tb side, a speed reduction device 9 for reducing the rotation of the electric motor 8 and transmitting it to the second valve shaft 5b is attached. It is done.

  Further, between the second and third throttle bodies Tb, Tc, the second fully closed stopper means 10b that engages with the second valve shaft 5b on the attachment side of the speed reducer 9 to restrict the fully closed position of the second throttle valve 6b. Is disposed.

  Further, a second return spring 11b that urges the second valve shaft 5b in the closing direction of the second throttle valve 6b is disposed between the first and second throttle bodies Ta and Tb.

  Further, on the outer end side of the first throttle body Ta, a first fully closed stopper means 10a that engages with the first valve shaft 5a and restricts the fully closed position of the first throttle valve 6a, and the first valve shaft 5a are set to 1 A first return spring 11a that urges the second throttle valve 6a in the closing direction is provided.

  Further, a third fully closed stopper means 10c that engages with the third valve shaft 5c to restrict the fully closed position of the third throttle valve 6c between the third and fourth throttle bodies Tc, Td, and the third valve shaft 5c. And a third return spring 11c that urges the third throttle valve 6c in the closing direction.

  Further, on the outer end side of the No. 4 throttle body Td, No. 4 full-close stopper means 10d that engages with No. 4 valve shaft 5d and regulates the full-close position of No. 4 throttle valve 6d, and No. 4 valve shaft 5d are provided as 4 A fourth return spring 11d that urges the second throttle valve 6d in the closing direction is provided.

  Hereinafter, the structure of each part is demonstrated sequentially.

  First, the electric motor 8 and the speed reducer 9 will be described with reference to FIGS.

  A speed reduction case 15 is screwed to one side surface of the second throttle body Tb, and the electric motor 8 is attached to the outer surface of the speed reduction case 15. The speed reduction device 9 is accommodated in a speed reduction case 15, and is supported by a pinion gear 16 fixed to the output shaft 8 a of the electric motor 8, and an intermediate shaft 17 supported by the speed reduction case 15. A large-diameter gear 18 that meshes, a small-diameter gear 19 that is integrally and coaxially formed on the side surface of the large-diameter gear 18, and a large-diameter sector gear 20 that is fixed to the second valve shaft 5b.

  Thus, according to the forward or reverse rotation of the output shaft 8a of the electric motor 8, the rotation is decelerated in two stages by the pinion gear 16 and the large diameter gear 18, the small diameter gear 19 and the sector gear 20, and the second valve shaft. 5b and further transmitted to the other valve shafts 5a, 5c and 5d via the tuning device 7, so that the 1st to 4th throttle valves 6a to 6d can be controlled finely at the same time.

  Next, the tuning device 7 will be described.

  First, in FIG. 4 to FIG. 7, the tuning device 7 for connecting the second and third valve shafts 5b and 5c will be described. A drive lever 21 is fixed to the second valve shaft 5b together with the sector gear 20, and a driven lever 22 adjacent thereto is fixed to the third valve shaft 5c. The drive lever 21 is formed with a first transmission wall 23 whose wall surface is directed in the rotational direction. The driven lever 22 has a first transmission wall 23 in between and the wall surface of the driven lever 22 along the rotational direction of the driven lever 22. A second transmission wall 24 and a spring seat wall 25 are formed to oppose each other, and the second transmission wall 24 has a first transmission wall 23 when the drive lever 21 or the driven lever 22 is rotated in the opening direction of the corresponding throttle valve. The abutting tuning bolt 26 is screwed to the first transmission wall 23 so as to be able to advance and retract. In addition, a set spring 27 made of a coil spring is urged between the first transmission wall 23 and the spring seat wall 25 to urge the first transmission wall 23 in the contact direction with the tuning bolt 26.

  Further, a backup bolt 28 penetrating the set spring 27 is threadably attached to the spring seat wall 25, and when the first transmission wall 23 abuts on the tuning bolt 26, the backup bolt 28 has a tip at the first transmission wall. It is arranged so as to face the back surface of 23 with a minute gap g.

The second transmission wall 24 and the spring seat wall 25 include an outer connecting wall 30 that connects their radially outer ends, an inner connecting wall 31 that connects their radially inner ends together, 2 transmission wall 24, spring seat wall 25 is a sidewall 32 are communicated set integrally connecting the four walls of the outer connecting wall 30 and the inner connecting wall 31, these, one side of the side facing the first lever 21 A tuning box 33 that is open and has a side other than the one side closed is configured, and the first transmission wall 23, the set spring 27, and the backup bolt 28 are accommodated in the tuning box 33.

  A cover wall 34 covering the open surface of the tuning box 33 is integrally connected to the first transmission wall 23 in a T shape. The cover wall 34 is disposed so as to allow relative rotation with the tuning box 33 while covering the open surface of the tuning box 33.

  The deceleration case 15 is provided with tool windows 15a and 15b for adjusting the tuning bolt 26 and the backup bolt 28, and these tool windows 15a and 15b are normally closed with caps 35 and 36, respectively.

  Thus, if the tuning bolt 26 screwed into the second transmission wall 24 is adjusted to advance and retreat with respect to the first transmission wall 23, the drive lever 21 and the driven lever 22, and therefore the first and second throttle valves 6a and 6b are moved. Since the relative rotation is performed, the opening degree of the first and second throttle valves 6a and 6b can be made the same, that is, synchronized by adjusting the advancement / retraction of the tuning bolt 26.

  Now, if the drive lever 21 is rotated in the opening direction of the second throttle valve 6b by forward rotation of the electric motor 8, the first transmission wall 23 pushes the second transmission wall 24 via the tuning bolt 26. The driven lever 22 rotates in the opening direction of the second throttle valve 6b. If the drive lever 21 is rotated in the closing direction of the second throttle valve 6b by the reverse rotation of the electric motor 8, the first transmission wall 23 pushes the spring seat wall 25 via the set load of the set spring 27. The driven lever 22 rotates in the closing direction of the second throttle valve 6b. At this time, when the load on the second throttle valve 6b is large and the return in the closing direction tends to be delayed, the first transmission wall 23 closes the gap g between the first transmission wall 23 and the backup bolt 28, and Since the spring seat wall 25 is directly pushed through, the excessive closing delay of the second throttle valve 6b can be prevented.

  By the way, the rigidity of the first transmission wall 23 is effectively enhanced by the cover wall 34 connected to the first transmission wall 23 in a T shape. On the other hand, the second transmission wall 24 and the spring seat wall 25 that are opposed to each other in the wall cooperate with the outer connecting wall 30, the inner connecting wall 31, and the side wall 32 to constitute a highly rigid tuning box 33. And the 2nd transmission walls 23 and 24 can transmit a transmission force efficiently mutually without bending, and can ensure the synchronous action | operation of the 2nd and 3rd throttle valves 6b and 6c which adjoin.

  Moreover, the tuning box 33 accommodates the tuning bolt 26, the set spring 27, and the backup bolt 28, and its open surface is covered by a cover wall 34 that reinforces the first transmission wall 23. It is possible to prevent dust from entering, and to prevent out-of-synchronization due to adhesion of dust or the like to the tuning bolt 26, the set spring 27, and the backup bolt 28 and the back-up timing of the backup bolt 28.

  Other tuning devices 7 have the same configuration as described above, and can exhibit the same effects. For example, as shown in FIGS. 7 and 8, in the tuning device 7 that connects the first and second valve shafts 5a and 5b, a drive lever 21 is provided on the second valve shaft 5b and a driven lever is provided on the first valve shaft 5a. Each 22 is fixed. Other configurations are the same as the configuration of the tuning device 7 between the second and third valve shafts 5b and 5c. In FIGS. 7 and 8, parts corresponding to the tuning device 7 are denoted by the same reference numerals. In addition, overlapping explanation is omitted.

  Next, the first to fourth fully closed stopper means 10a to 10d will be described. First, in FIG. 5, the second fully closed stopper means 10b is adjustably screwed to the stopper arm 20 also used as the sector gear 20 and the boss 37 projecting from the side surface of the second throttle body Tb. And a stopper bolt 38 that abuts against the side surface 20 and regulates the fully closed position of the second throttle valve 6b.

  As the third fully closed stopper means 10c, a tuning device 7 for connecting the third and fourth valve shafts 5c and 5d is used. That is, the drive levers 21 of all the tuning devices 7 are formed with a protruding piece 21a having an L-shaped cross section protruding in the radial direction, and the third fully closed stopper means 10c is fixed to the third valve shaft 5c. The projecting piece 21a of the drive lever 21 and the boss 37 projecting from the side surface of the third throttle body Tc are screwed so as to be adjustable, and the fully closed position of the second throttle valve 6b is regulated by contacting the projecting piece 21a. The stopper bolt 38 is configured. Therefore, in this case, the drive lever 21 also serves as the stopper arm of the third fully closed stopper means 10c.

  The first and fourth fully closed stopper means 10a and 10d are provided with dedicated stopper arms (not shown) fixed to the outer ends of the first and fourth valve shafts 5a and 5d, and the first and fourth throttle bodies. A stopper bolt that is adjustably screwed to a boss projecting from each of the outer surfaces of Ta and Td, and that contacts the stopper arm and regulates the fully closed positions of the first and fourth throttle valves 6a and 6d. Is done. Since these bosses and stopper bolts have the same structure as the boss 37 and stopper bolt 38, their illustration is omitted.

  The fully closed positions of the throttle valves 6a to 6d regulated by the fully closed stopper means 10a to 10d are positions just before the throttle valve contacts the inner peripheral surface of the corresponding intake passage 1, thereby Sticking due to biting of the throttle valve into the inner peripheral surface of the intake passage 1 can be prevented.

  As shown in FIG. 7, the first to fourth return springs 11a to 11d are made of torsion coil springs arranged on the outer circumferences of the corresponding valve shafts 5a to 5d. The other end of the tuning device 7 is engaged with a protrusion 21a of the driving lever 21 or the stopper arm (not shown), and the other end is engaged with an engaging portion 40 protruding from the side surface of the adjacent throttle body.

  As shown in FIGS. 1 to 3, on the outer surface of the outermost throttle body, for example, the fourth throttle body Td, the throttle opening for detecting the opening degree of the fourth throttle valve 6d from the rotation angle of the fourth valve shaft 5d is detected. A degree sensor 43 is provided. The opening of the fourth throttle valve 6d detected by the throttle opening sensor 43 also represents the opening of the other first to third throttle valves 6a to 6d.

  As shown in FIG. 3, the motorcycle includes an accelerator opening sensor 44 that detects an operation opening of the accelerator grip 42, and the electric motor according to output signals of the throttle opening sensor 43 and the accelerator opening sensor 44. And an electronic control unit 45 for operating 8.

  During the operation of the motorcycle, the electronic control unit 45 performs forward or reverse control of the electric motor 8 so that the detection signal value of the throttle opening sensor 43 matches the detection signal value of the accelerator opening sensor 44, and decelerates. The second valve shaft 5b is rotated forward or reversely through the device 9, and a throttle opening corresponding to the accelerator opening is given to the second throttle valve 6b. One end of the second valve shaft 5b is connected to the first valve shaft 5a via the tuning device 7, and the other end of the second valve shaft 5b is connected to the third valve shaft 5c via the tuning device 7, respectively. Since the third valve shaft 5c is connected to the fourth valve shaft 5d via the tuning device 7, the first, third and fourth throttle valves 6a, 6c and 6d are all synchronized with the second throttle valve 6b. The same throttle opening is controlled.

  When the operation of the electric motor 8 is stopped, the 1st to 4th throttle valves 6a to 6d are regulated by the 1st to 4th fully closed stopper means 10a to 10d by the set load of the 1st to 4th return springs 11a to 11d. Closed to the fully closed position.

  The present invention is not limited to the above embodiments, and various design changes can be made without departing from the scope of the invention. For example, the number of throttle bodies connected can be set freely. In contrast to the above embodiment, the first transmission wall 23 can be formed on the driven lever 22 side, and the second transmission wall 24 can be formed on the drive lever 21 side. The present invention is also applicable to a multiple throttle body for automobiles. In that case, the accelerator opening sensor 3 detects the opening of the accelerator pedal.

T ... Multiple throttle bodies Ta, Tb; Tb, Tc; Tc, Td ... Adjacent throttle bodies 1 ... Intake passages 5a, 5b; 5b, 5c; 5c, 5d ... Adjacent valve shafts 6a, 6b; 6b, 6c; 6c, 6d ... Adjacent throttle valve 7 ... Tuning adjustment 8 ... Electric motor 21 ... Drive lever 22 ... Drive lever 23... First transmission wall 24... Second transmission wall 25... Spring seat wall 26. 31... Inner connecting wall 32... Side wall 33.

Claims (2)

Valve shafts (5a, 6b; 6c, 6c, 6d) of two throttle valves (6a, 6b; 6b, 6c; 6c, 6d) rotatably supported by two adjacent throttle bodies (Ta, Tb; Tb, Tc; Tc, Td). 5b; 5b, 5c; 5c, 5d) are arranged on the same axis, and the first lever (21) fixed to one of the valve shafts is provided with a first transmission wall (23) whose wall is directed in the rotational direction. The second lever (22) formed and fixed to the other valve shaft is opposed to the wall surface along the rotational direction of the second lever (22) with the first transmission wall (23) in between. A second transmission wall (24) and a spring seat wall (25) are formed, and the first transmission lever (21) or the second lever (22) is attached to the second transmission wall (24) in the opening direction of the corresponding throttle valve. The tuning bolt (2) abutting against the first transmission wall (23) when rotating ) Is screwed to the first transmission wall (23) so as to be able to advance and retreat, and the first transmission wall (23) is tuned between the first transmission wall (23) and the spring seat wall (25). In a throttle valve tuning device in a multiple throttle body, in which a set spring (27) urged in a contact direction with a bolt (26) is contracted,
The second transmission wall (24) and the spring seat wall (25), the outer connecting wall (30) for connecting the radially outer ends thereof, and the inner connecting wall for connecting the radially inner ends thereof. (31) and the side wall (32) connecting the four walls of the second transmission wall (24), the spring seat wall (25), the outer connecting wall (30) and the inner connecting wall (31), the first lever A tuning box (33) for accommodating the first transmission wall (23) and the set spring (27) by opening one side facing the side (21) and closing the side other than the one side;
The open said one side surface of the cover the cover wall of the tuning box (33) (34), said in a direction along said one of the valve shaft first transmission wall (23), remote from said side wall (32) A throttle valve tuning device in a multiple throttle body, characterized in that the cover wall (34) and the first transmission wall (23) are connected to the end edge portion so as to form a T shape . In the throttle valve tuning device in the multiple throttle body according to claim 1,
An electric motor (8) for opening and closing all throttle valves (6a, 6b; 6b, 6c; 6c, 6d) is connected to one valve shaft, and a throttle valve tuning device in a multiple throttle body .

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