JP2011007089A - Control device of multiple string throttle valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a multiple throttle body of three-throw or more compact, by narrowing an interval of adjacent two throttle bodies neighbouring each other by sandwiching a reduction gear.SOLUTION: The reduction gear 9 connecting mutual valve stems 5b of an electric motor 8 and a driving throttle body system, is arranged between a driving throttle body Tb for installing the electric motor 8 and a driven throttle body Tc adjacent to its driving throttle body, and a fully closing stopper means 10b of the driving throttle body system is connected to one end part on the reduction gear 9 side of the valve stem 5b of the same system, and a return spring 11b of the same system is also connected to the other end part of the valve stem 5b. Fully closing stopper means 10a, 10c and 10d of a driven throttle body system and return springs 11a, 11c and 11d are connected to one end part on the opposite side of the driving throttle body of valve stems 5a, 5c and 5d of the driven throttle body system, and a set load of the return spring of the driving throttle body system is set larger than a set load of the return spring of the driven throttle body system.

Description

  In the present invention, the valve shafts of throttle valves rotatably supported by three or more throttle bodies adjacent to each other at substantially equal intervals are coaxially arranged, and the adjacent valve shafts are connected to each other via a tuning device, One throttle body with an electric motor is used as a drive throttle body, and the other throttle body is a driven throttle body, and the speed reduction device transmits the rotation of the electric motor to the drive side valve shaft of the drive throttle body system at a reduced speed. Are arranged between the drive throttle body and the driven throttle body adjacent to the drive throttle body, and between each throttle body and each valve shaft, a fully closed stopper means for restricting the fully closed position of each throttle valve is constructed. The present invention relates to a control device for a multiple throttle valve comprising a valve shaft connected to a return spring that urges the valve shaft in the closing direction of each throttle valve.

  A control device for a multiple throttle valve is known as disclosed in Patent Document 1.

JP 2004-132289 A

  In the control device for the multiple throttle valve, when the throttle valve is driven to open, the valve shaft return spring and the fully-closed stopper means are installed in the valve shaft drive part to minimize the mutual synchronization deviation of the throttle valve due to the twist of the valve shaft. It is common practice to place them close together. Conventionally, when an electric motor and a speed reducer that decelerates rotation of the motor are used to drive the valve shaft, the valve shafts of a plurality of throttle valves are divided into a plurality of parts and the adjacent valve shafts are connected via a tuning device. It is known that a reduction device connected to one valve shaft and a return spring fully-closed stopper means connected to one or the other valve shaft are arranged between two adjacent throttle bodies.

  However, a space between the two throttle bodies is necessary because a reduction gear connected to one valve shaft and a return spring connected to one or the other valve shaft are arranged between two adjacent throttle bodies. Therefore, when multiple throttle bodies are arranged at equal intervals, the intervals between the throttle bodies must be based on the above-mentioned wide intervals, and the entire multiple throttle bodies inevitably become longer in the direction of the valve shaft. become.

  The present invention has been made in view of such circumstances, and enables the interval between two throttle bodies adjacent to each other with a reduction gear to be narrowed, thereby contributing to the compactness of a multiple throttle body having three or more stations. In addition, an object of the present invention is to provide a control device for a multiple throttle valve that can reduce the synchronization deviation of a plurality of throttle valves as much as possible.

  In order to achieve the above-mentioned object, the present invention is arranged such that the valve shafts of throttle valves rotatably supported by three or more throttle bodies adjacent to each other at substantially equal intervals are coaxially arranged, and the adjacent valve shafts are connected to each other. One throttle body, which is connected through a synchronizer and attached with an electric motor, is used as a drive throttle body, and the other throttle body is used as a driven throttle body, and the rotation of the electric motor is driven on the drive side valve shaft of the drive throttle body system. A decelerating device that decelerates and transmits the signal to the drive throttle body and the driven throttle body adjacent to the drive throttle body, and a fully closed position that restricts the fully closed position of each throttle valve between each throttle body and each valve shaft. A multi-throttle valve comprising stopper means and connecting each valve shaft with a return spring that biases it in the closing direction of each throttle valve. In the control device, the full throttle stopper means of the drive throttle body system is connected to one end of the valve shaft of the drive throttle body system on the speed reducer side, and a return spring of the same system is connected to the other end of the valve shaft, The fully closed stopper means and return spring of the driven throttle body system are connected to one end of the driven throttle body system valve shaft opposite to the drive throttle body, and the set load of the return spring of the drive throttle body system is connected to the driven throttle body. The first characteristic is that the load is set larger than the set load of the return spring of the system. The drive throttle body corresponds to a second throttle body Tb in an embodiment of the present invention to be described later, and the driven throttle body corresponds to a throttle body Ta, Tc, Td other than the second throttle body Tb. The support corresponds to the deceleration case 15 in the same embodiment.

  According to the present invention, in addition to the first feature, the reduction gear is provided with a pinion gear fixed to the output shaft of the electric motor and an intermediate large diameter that is supported by a support body connected to the drive throttle body and meshes with the pinion gear. A gear, an intermediate small-diameter gear coaxially connected to the intermediate large-diameter gear, a sector gear fixed to the valve shaft of the drive throttle body system and meshing with the intermediate small-diameter gear, and the intermediate large-diameter gear, The second feature is that it is disposed between the drive throttle body and the sector gear.

  According to the first feature of the present invention, the fully closed stopper means of the drive throttle body system is provided at one end of the valve shaft of the drive throttle body system on the speed reducer side, and a return spring of the same system is provided in addition to the valve shaft. Because it is connected to each end, it avoids the concentrated arrangement of the return spring of the drive throttle body system to the fully closed stopper means and the reduction gear mechanism of the same system, and the distance between the drive throttle body and the driven throttle body can be narrowed Therefore, by determining the distance between the other driven throttle bodies on the basis of the narrowed distance, it is possible to form a compact structure of three or more multiple throttle bodies having a substantially equal arrangement.

  Also, by connecting the fully closed stopper means and the return spring to both ends of the valve shaft of the drive throttle body system, the valve shaft of the drive throttle body system is given a preload in the torsional direction between the both ends. In addition, the set load of the return spring of the drive throttle body system is set to be larger than the set load of the return springs of other driven throttle body systems, so that the valve shaft of the drive system is driven by the drive torque of the electric motor. When driven in the opening direction of the system throttle valve, the drive system throttle valve is almost delayed with respect to the operation of the electric motor by reacting immediately without being affected by the repulsive torque by the return springs of other driven systems. Can be opened without any problem.

  According to the second feature of the present invention, the intermediate large-diameter gear of the speed reducer is arranged by utilizing the installation space of the return spring of the drive throttle body system conventionally existing between the drive throttle body and the speed reducer. Therefore, it can further contribute to downsizing of three or more multiple throttle bodies.

1 is a front view of a multiple throttle body for a motorcycle according to a first 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. FIG. 4 is a diagram corresponding to FIG. 3 showing a second embodiment of the present invention.

Embodiments of the present invention will be described below on the basis of preferred embodiments of the present invention shown in the accompanying drawings.
[First embodiment]
A first 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, a quadruple throttle body T is formed by arranging four throttle bodies Ta to Td each having an intake passage 1 in parallel and at substantially equal intervals. No. throttle body Ta to 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.

  The downstream body halves 3 of the 1st to 4th throttle bodies Ta to Td are rotatably supported by the 1st to 2nd 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. A tuning device 7 is provided between each of the first to fourth valve shafts 5a to 5d to connect the adjacent valve shafts to each other.

  On the other hand, between the second and third throttle bodies Tb and Tc, on the other hand, in the illustrated example, the electric motor 8 and the speed reducer 9 that transmits the rotation of the electric motor 8 to the second valve shaft 5b while reducing the speed thereof. Is attached.

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

  Further, a second return spring 11b for urging 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 1 A first return spring 11a that urges the second throttle valve 6a in the closing direction is provided.

  Further, between the third and fourth throttle bodies Tc and Td, 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, and a 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 fully-closed stopper means 10d that engages with the No. 4 valve shaft 5d and restricts the fully-closed position of the No. 4 throttle valve 6d, and the No. 4 valve shaft 5d are provided with 4 A fourth return spring 11d that urges the second throttle valve 6d in the closing direction is provided.

  Next, the configuration of each part will be described 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. An intermediate large-diameter gear 18 that meshes, an intermediate small-diameter gear 19 that is integrally and coaxially connected to a side surface of the intermediate large-diameter gear 18, and a large-diameter sector gear 20 that is fixed to the second valve shaft 5b. Is done. At that time, the intermediate large diameter gear 18 is disposed between the second throttle body Tb, the intermediate small diameter gear 19 and the sector gear 20.

  Thus, according to the forward rotation or reverse rotation of the output shaft 8a of the electric motor 8, the rotation is decelerated in two steps by the pinion gear 16 and the intermediate large diameter gear 18, and the intermediate small diameter gear 19 and the sector gear 20 to obtain the second position. Since it is transmitted to the valve shaft 5b and further transmitted to the other valve shafts 5a, 5c and 5d via the tuning device 7, the first to fourth 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. Further, 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 screwed to the spring seat wall 25 so that the backup bolt 28 can be adjusted. When the first transmission wall 23 abuts the tuning bolt 26, the tip of the backup bolt 28 is 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) A transmission wall 24, a spring seat wall 25, an outer connecting wall 30, and a side wall 32 that integrally connects four walls of the inner connecting wall 31 are connected to each other, thereby forming a tuning box 33 having one side opened. 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 they rotate relative to each other, the opening degree of the first and second throttle valves 6a and 6b can be made equal, that is, synchronized by adjusting the advance / retreat 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 face each other face each other in cooperation 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 mutually efficiently, without bending, and can ensure the synchronous action | operation of the 2nd and 3rd throttle valves 6b and 6c which adjoin.

  In addition, 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 dust adhering 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 for connecting 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. A duplicate description will be 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 protruding 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 on 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 abuts against the stopper arm and restricts 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, illustration thereof is omitted.

  The fully closed position of each throttle valve 6a-6d regulated by each of the fully closed stopper means 10a-10d is a position 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, a throttle opening for detecting the opening degree of the fourth throttle valve 6d from the rotation angle of the fourth valve shaft 5d is provided. 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, 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 first to fourth throttle valves 6a to 6d are regulated by the first to fourth fully closed stopper means 10a to 10d by the set load of the first to fourth return springs 11a to 11d. Closed to the fully closed position.

  Thus, the second fully-closed stopper means 10b of the second throttle body Tb (driving throttle body) system to which the electric motor 8 and the speed reducer 9 are attached is provided at one end of the second valve shaft 5b on the speed reducer 9 side, The return spring 11b is connected to the other end of the second valve shaft 5b, respectively, and the first, third, fourth fully closed stopper means 10a, 10c, 10d and the first, third, fourth return springs 11a, 11c, 11d is the first, third, and fourth throttle bodies Ta, Tc, and Td (driven throttle body) system, the first, third, and fourth valve shafts 5a, 5c, and 5d on the opposite side to the second throttle body Tb. Is connected to one end of the. At that time, the set load of the second return spring 11b is set larger than the set loads of the other first, third, and fourth return springs 11a, 11b, and 11c.

  By the way, the 2nd fully closed stopper means 10b of the 2nd throttle body Tb (drive throttle body) system to which the electric motor 8 and the speed reducer 9 are attached is provided at one end of the 2nd valve shaft 5b on the speed reducer 9 side, and 2 The return spring 11b is connected to the other end of the second valve shaft 5b, respectively, and the first, third and fourth fully closed stopper means 10a, 10c and 10d and the first, third and fourth return springs 11a and 11c. 11d is opposite to No. 1, No. 3, No. 4 throttle body Ta, Tc, Td (driven throttle body) No. 1, No. 3, No. 4 of valve shaft 5a, 5c, 5d, No. 2 throttle body Tb Since the second return spring 11b is concentrated on the speed reducer 9 and the second fully closed stopper means 10b, the distance between the second and third throttle bodies Tb and Tc is reduced. Becomes possible By determining the interval between the other No. 1 and No. 2 throttle bodies Ta and Tb and the interval between No. 3 and No. 4 throttle bodies Tc and Td on the basis of the narrowed interval, a quadruple throttle with an equal interval arrangement is used. The body T can be configured compactly.

  Further, in the reduction gear 9, the intermediate large diameter gear 18 is disposed between the second throttle body Tb and the intermediate small diameter gear 19 and the sector gear 20, so that conventionally, between the second throttle body Tb and the reduction gear 9. The intermediate large-diameter gear 18 of the speed reducer 9 is arranged using the existing installation space of the second return spring, and the distance between the second throttle body Tb and the third throttle body Tc can be further reduced. This can further contribute to the downsizing of the four-throttle throttle body T having an equally spaced arrangement.

  Further, by connecting the second fully closed stopper means 10b and the second return spring 11b to both ends of the second valve shaft 5b, the second valve shaft 5b is given a preload in the twist direction between the both ends. In addition, the set load of the second return spring 11b is set larger than the set loads of the other first, third, and fourth return springs 11a, 11b, and 11c, so that the second valve shaft 5b is electrically driven. When the driving torque of the motor 8 is received and driven in the opening direction of the second throttle valve 6b, the second throttle valve 6b is driven immediately by being hardly affected by the repulsive torque by the first return spring 11a. The motor 8 can be opened with almost no delay.

At this time, the first, third and fourth valve shafts 5a, 5c and 5d are twisted due to the repulsive torque of the first, third and fourth return springs 11a, 11b and 11c. The number 4 and number 4 throttle valves 6a, 6c and 6d open slightly later than the number 2 throttle valve 6b, but the delay is negligible.
[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIG. 9. This second embodiment is an example in which the present invention is applied to a triple throttle body for a three-cylinder engine mounted on a motorcycle. This corresponds to the fourth throttle body Td in the first embodiment removed. In FIG. 9, parts corresponding to those of the first embodiment are denoted by the same reference numerals, and redundant description is omitted. In the second embodiment, the same effects as those in the first embodiment can be produced.

  The present invention is not limited to the above embodiment, and various design changes can be made without departing from the scope of the invention. For example, if the number of connecting throttle bodies is three or more, it can be freely selected. The present invention is also applicable to a control device for a multiple throttle valve for automobiles.

T ... Multiple throttle body Tb ... Drive throttle body (2nd throttle body) Ta, Tc; Td ... Driving throttle body (1st, 3rd, 4th throttle body)
DESCRIPTION OF SYMBOLS 1 ... Intake passage 5a-5d ... Valve shaft 6a-6d ... Throttle valve 7 ... Tuning adjustment 8 ... Electric motor 8a ... Output shaft of electric motor 9 ... Deceleration device 15 ... Support (deceleration case)
16 .... pinion gear 17 ... intermediate shaft 18 ... intermediate large diameter gear 19 ... intermediate small diameter gear 20 ... sector gear

Claims (2)

The valve shafts (5a to 5d) of the throttle valves (6a to 6d), which are rotatably supported by three or more throttle bodies (Ta to Td) adjacent to each other at substantially equal intervals, are coaxially arranged, and adjacent valves The shafts are connected to each other via a tuning device (7), and one throttle body to which the electric motor (8) is attached is used as a drive throttle body (Tb), and the other throttle bodies are driven throttle bodies (Ta, Tc, Td), a reduction device (9) that transmits the rotation of the electric motor (8) at a reduced speed to the valve shaft (5b) of the drive throttle body (Tb) system is connected to the drive throttle body (Tb) and the driven device adjacent thereto. It is arranged between the throttle bodies (Tc), and the fully closed position of each throttle valve (6a to 6d) is defined between each throttle body (Ta to Td) and each valve shaft (5a to 5d). And a return spring (11a to 11d) for urging the valve shaft (6a to 6d) in the closing direction of the throttle valve (6a to 6d). A control device for multiple throttle valves connected to each other,
A fully-closed stopper means (10b) of the drive throttle body (Tb) system is connected to one end of the valve shaft (5b) of the drive throttle body (Tb) system on the speed reducer (9) side, and a return spring (11b) of the same system ) To the other end of the valve stem (5b),
The driven throttle body (Ta, Tc, Td) system fully closed stopper means (10a, 10c, 10d) and the return spring (11a, 11c, 11d) are connected to the driven throttle body (Ta, Tc, Td) system valve shaft ( 5a, 5c, 5d) connected to one end of the drive throttle body (Tb) on the opposite side,
The set load of the return spring (11b) of the drive throttle body (Tb) system is set larger than the set load of the return springs (11a, 11c, 11d) of the driven throttle body (Ta, Tc, Td) system. A control device for multiple throttle valves. The control device for a multiple throttle valve according to claim 1,
The reduction gear (9) is pivotally supported by a pinion gear (16) fixed to an output shaft (8a) of an electric motor (8) and a support (15) connected to a drive throttle body (Tb) to support the pinion gear ( 16) The intermediate large diameter gear (18) meshing with the intermediate large diameter gear (18), the intermediate small diameter gear (19) coaxially connected to the intermediate large diameter gear (18), and the valve shaft (5b) of the drive throttle body (Tb) system. And a sector gear (20) meshing with the intermediate small-diameter gear (19), and the intermediate large-diameter gear (18) is disposed between the drive throttle body (Tb) and the sector gear (20). A control device for multiple throttle valves.

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