JPH05248274A - Throttle valve driving gear - Google Patents

Abstract

PURPOSE:To provide a throttle valve driving gear wherein a reaction load generating mechanism can be constituted by a single device to facilitate its arrangement and changing a characteristic of accelerator pedal step-in reaction load is easily performed. CONSTITUTION:A control drum 15 turned in accordance with action of an accelerator pedal and a control shaft 16 screwed to the control drum and mounted movably in only an axial direction are provided. A throttle valve driving gear is constituted by providing a valve driving means for actuating a throttle valve opened and closed in accordance with turning the control drum 15, torsional coil spring 19 of generating reverse energizing force to turning the control drum 15 by stepping-in the accelerator pedal and the first reaction load against a step-in of the accelerator pedal and a compression spring 17 compressed according to moving in the axial direction of the control shaft in accordance with the step-in of the accelerator pedal to generate the second reaction load against the step-in of the accelerator pedal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a throttle valve drive device for transmitting the operation of an accelerator pedal to a throttle valve and opening and closing the throttle valve according to the operation of the accelerator pedal. The present invention relates to a throttle valve having a configuration capable of setting a reaction force load against the throttle valve.

[0002]

2. Description of the Related Art Normally, the opening control of a throttle valve of an engine in an automobile is performed according to the operation of an accelerator pedal. Therefore, in the past, the accelerator pedal and the throttle valve were mechanically linked by a link, a cable, etc., the operation of the accelerator pedal was mechanically transmitted to the throttle valve, and the opening / closing of the throttle valve was performed according to the operation of the accelerator pedal. It was configured to operate. In this case, a spring is placed in the middle of the link and cable,
A reaction force load to the depression of the accelerator pedal is generated by this spring, and when the depression of the accelerator pedal is released, the accelerator pedal returns and the throttle opening also returns to the fully closed state.

Here, the reaction force load with respect to the depression of the accelerator pedal is set so as to meet the driver's feeling request, and normally, it is relatively small at the start of depression,
It is set to increase as the amount of depression increases. However, the required value of the reaction force load with respect to the depression amount does not always change proportionally.For example, the reaction force load gradually increases with respect to the depression in the first half of the depression, and the reaction force load with respect to the depression increases in the latter half of the depression. The force load is required to have a characteristic that increases relatively rapidly. In response to such demands, conventionally, a link from the accelerator pedal to the throttle valve,
A plurality of springs are provided in a transmission system such as a cable so that characteristics close to desired characteristics can be obtained.

[0004]

However, in the case of such a conventional throttle valve drive device, the link,
The problem that it is necessary to secure extra space for disposing multiple springs in a transmission system such as a cable, the problem that it is difficult to dispose, and the structure of the transmission system tends to be complicated, and the springs at multiple locations There is a problem in that maintainability is not very good if it is installed. Further, when a part of the reaction force load characteristic with respect to the depression of the accelerator pedal is to be changed, even if only one of the plurality of springs is changed, the entire characteristic is changed. Therefore, it is necessary to change the characteristic. There is also the problem of difficulty.

Furthermore, recently, the throttle valve can be operated independently of the accelerator pedal by an electric actuator or the like, and the operation of the accelerator pedal is electrically detected by a sensor. DBW (Drive By Wir) that controls the opening and closing of the throttle valve by an electric actuator
e) A throttle drive device called control may be used. In such a case, a spring that applies a reaction force load is provided between the accelerator pedal and the sensor that are mechanically connected, but the accelerator pedal and the sensor should be placed close to each other. However, the conventional method of providing a plurality of springs in the transmission system has a problem that it is difficult to secure a space for disposing the springs and it is difficult to dispose the springs.

In view of such a problem, the present invention makes it easy to change the characteristics of the reaction force load with respect to the depression of the accelerator pedal, and the mechanism for generating the reaction force load can be constructed by one device, and the arrangement thereof can be provided. It is an object of the present invention to provide a throttle valve drive device that is easy to operate.

[0007]

In order to achieve such an object, according to the present invention, the case is rotatably disposed and mechanically connected to an accelerator pedal, and the rotary pedal is rotated according to the operation of the accelerator pedal. The control drum that is moved, the control shaft that is screwed into the inner diameter screw that is coaxially formed in the control drum, and the control shaft that is movable in the axial direction but whose movement in the rotation direction is restricted. Is engaged,
A shaft holder fixed to the case, a valve driving means for opening and closing the throttle valve in response to the rotation of the control drum, and one end connected to the case and the other end connected to the control drum are arranged. When the accelerator pedal is depressed, an urging force opposite to the rotation of the control drum is generated, and the first depression of the accelerator pedal is generated.
Is arranged between the control shaft and the case or shaft holder and the torsion coil spring that generates the reaction force load and is compressed according to the axial movement of the control shaft caused by the rotation of the control drum due to the depression of the accelerator pedal. A throttle valve drive device is composed of a compression coil spring that generates a second reaction force load with respect to depression of the accelerator pedal.

It is desirable that the connecting position between one end of the torsion coil spring and the case be adjustable so that the initial value of the first reaction force load at the start of depression of the accelerator pedal can be adjusted. When the accelerator pedal is depressed by a predetermined amount, for example, the space where the compression coil spring is arranged, that is, the space between the control shaft and the case or the shaft holder is made larger than the free length of the compression coil spring. It is desirable to configure the compression coil spring to start compression for the first time. In this case, it is desirable that the mounting position of the shaft holder on the case can be adjusted and the rotational position of the control shaft can be adjusted by this mounting position adjustment to adjust the compression start position of the compression coil spring.

[0009]

In the throttle valve drive device having the above structure, the characteristic of the torsion coil spring (first reaction force load characteristic) and the characteristic of the compression coil spring (second reaction force load characteristic) are combined to form the accelerator pedal. Since the load reaction force characteristic with respect to the depression is set, various characteristics can be set by changing the characteristics of both springs. Especially, if the compression of the compression coil spring is started when the accelerator pedal is depressed by a predetermined amount, the reaction force load characteristics are set only by the torsion coil spring in the first half of the depression of the accelerator pedal, and both springs are combined in the latter half. The reaction force load characteristics can be set, the degree of freedom in setting the reaction force load characteristics is high, and the setting is easy.

Further, in the case of this throttle valve drive device, a mechanism for generating the first and second reaction force loads is incorporated in the case, and this device is provided with a transmission system from the accelerator pedal to the throttle valve. If you install it somewhere inside, you can set the reaction load. Therefore, there are few restrictions on the installation position of the device, and its attachment is easy. In the transmission system from the accelerator pedal to the throttle valve, the valve drive means detects a rotational position of the control drum, a rotational position sensor, an electric actuator for controlling the opening / closing position of the throttle valve, and a rotational position sensor. Of the DBW control system, which comprises a controller that controls the operation of the electric actuator based on the rotational position signal detected by, or a valve drive means mechanically connects the control drum and the throttle valve with a link, a cable, or the like. Although there is a mechanical control system including connecting means, the present device can be easily attached in any system.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. The throttle valve drive device of the present invention,
As shown in FIG. 2 and FIG. 3, this is for transmitting the depression operation of the accelerator pedal 1 to the actuator 7 to open / close the throttle valve 6 arranged in the engine intake passage 5. One end of a cable 2 is connected to the tip of a lever 1a connected to the accelerator pedal 1, and the other end of the cable 2 is connected to a load setting device 10 attached to the vehicle body 3. Therefore, the operation of the accelerator pedal 1 is transmitted to the load setting device 10 via the core wire 2a of the cable 2, and the load setting device 10 sets a reaction force load with respect to the depression of the accelerator pedal 1.

The load setting device 10 includes, as will be described later,
A rotation position sensor 50 for detecting the rotation position of the control drum rotated in response to the operation of the accelerator pedal 1 is attached. The throttle valve drive device shown in this example adopts the DBW control system, and the rotation position sensor 50 sends the detected rotation position signal of the control drum to the controller 65 via the signal line 61. .. Since this turning position corresponds to the operation of the accelerator pedal 1, the controller 65 calculates the depression amount of the accelerator pedal 1 from the turning position signal,
A drive signal is sent to the electric actuator 7 via the signal line 62 so as to set the opening degree of the throttle valve 6 corresponding to the depression amount. As a result, the throttle valve 6 is opened and closed corresponding to the operation of the accelerator pedal 1. At the same time, the reaction force load to the depression operation of the accelerator pedal 1 is set by the load setting device 10 so as to have a desired characteristic.

The structure of the load setting device 10 will be described below with reference to FIGS. 1, 4 and 5. Note that FIG. 5 shows only the main components of the load setting device 10. The device 10 has a case formed by integrally connecting a central case 11, a left case 12, and a right case 25 with bolts 24 and the like, and bearings 14a, 1
A control drum 15 is rotatably provided via 4b. However, the right bearing 14b is the right case 2
The shaft holder 25 is fixed to 0 and is attached to the boss portion 26 of the shaft holder 25 protruding leftward from the opening 20a of the right case 20.

The control drum 15 has a drive gear 15a formed on the outer diameter portion on the left end and a female screw 15b formed on the inner diameter portion on the left side. Has been formed. A horizontally long core wire locking hole 15d is formed in this flange. The right side portion of the control drum 15 is composed of a hollow cylindrical portion 15e, and the tip of this cylindrical portion 15e is rotatably supported by a right bearing 14b.

The tip end locking member 2b is locked in the core wire locking hole 15d of the control drum 15, and the core wire 2a of the cable 2 is wound around and attached to the cable winding groove 15c. The cover of the cable 2 is the left case 1
It is held and attached by the second arm portion 12a, and in this state, the core wire 2a projects into the case and is wound and locked by the cable winding groove 15c of the control drum 15. As shown in FIG. 2, the cable 2 is connected to the accelerator pedal 1. When the accelerator pedal 1 is depressed, the core wire 2a is pulled, and the control drum 15 around which the core wire 2a is wound is rotated.

A pair of rotational position sensors 50 are attached to the side surface of the left case 12 by being pressed by the cover 13. The shafts 51 of both the sensors 50 project into the left case 12, and driven gears 52 are attached to the tips of the shafts 51, respectively. Each driven gear 52 meshes with the drive gear 15a at the left end of the control drum 15, and when the control drum 15 is rotated in response to the depression of the accelerator pedal 1 as described above, this rotation causes the gear 15a, It is transmitted to the shaft 51 of both sensors 50 via 52, and the shaft 51 is rotated. The rotation position sensor 50 is composed of, for example, a potentiometer, and detects the rotation amount of the shaft 51. This detection signal is sent to the controller 65 via the signal line 61. Although a pair of rotational position sensors 50 are provided here, both sensors 50 perform the same detection to improve the reliability of the device.

The right cylindrical portion 15 of the control drum 15
The inner space of e communicates with the space in which the female screw 15b is formed in the left inner diameter portion, and the control shaft 16 is arranged from the right side in the inner space of the right cylindrical portion 15e. The control shaft 16 has a flange portion 16b in the center and a male screw 16a is formed on the outer periphery on the left side. The flange portion 16b is located in the internal space of the cylindrical portion 15e.
It is screwed with the female screw 15b. Control shaft 16
An outer tooth spline 16c is formed on the right outer periphery of the outer tooth spline 16c, and the outer tooth spline 16c meshes with an inner tooth spline 26a formed through the boss portion 26 of the shaft holder 25.

Since the shaft holder 25 is fixed to the right case 20, the control shaft 16 thus spline-engaged with the shaft holder 25 is slidable in the axial direction, but its movement in the rotational direction is restricted. To be done. On the other hand, since the male screw 16a of the control shaft 16 is screwed with the female screw 15b of the control drum 15,
When the control drum 15 is rotated in response to the depression of the accelerator pedal 1 as described above, both screws 15b, 1
Relative rotation occurs in 6a. As a result, the control shaft 16 is moved in the axial direction. Specifically, when the accelerator pedal 1 is depressed, the control shaft 16 is moved to the right in FIG. 1 (toward the right case 20). In order to smoothly move the control shaft 16 according to the rotation of the control drum 15, a multi-start screw, a ball screw or the like is used as the screws 15b and 16a.

In the inner space of the cylindrical portion 15e of the control drum 15, between the flange portion 16b of the control shaft 16b and the left end surface of the boss portion 26 of the shaft holder 25, the outer peripheral side of the control shaft 16 is located. A compression coil spring 17 is provided. A spring seat 18 is arranged at the right end of the compression coil spring 17. When the control shaft 16 is closest to the left side (when the accelerator pedal 1 is not depressed, it is set to this state), the flange portion 1
The distance between 6b and the left end surface of the boss portion 26 is larger than the free length of the compression coil spring 17. Therefore, the compression coil spring 17 is not compressed until the control shaft 16 moves rightward by a predetermined amount or more.

Further, the cylindrical portion 1 of the control drum 15
A double-twisted coil spring 19 is provided on the outer peripheral side of 5e. One end 19a of the torsion coil spring 19 projects to the outer periphery on the right side and is locked by a hook bolt 30 inserted into and attached to the outer mounting hole 21 of the right case 20. The other end 19b of the torsion coil spring 19 projects to the inner circumference on the right side and is locked in a notch 15f formed at the tip of the cylindrical portion 15e of the control drum 15.

Thus, the torsion coil spring 19 has one end 1
Since 9a is locked to the right case 20 and the other end 19b is locked to the control drum 15, the biasing force of the torsion coil spring 19 acts in the direction of rotating the control drum 15. This urging force acts in the direction opposite to the rotation direction of the control drum 15 corresponding to the depression of the accelerator pedal 1, and the urging force generates a first reaction force load F1 with respect to the depression of the accelerator pedal 1.

On the other hand, as described above, since the control shaft 16 is moved to the right in FIG. 1 by the rotation of the control drum 15 in response to the depression of the accelerator pedal 1, this movement proceeds to some extent (exceeding a predetermined amount. When it is moved to the right), the compression coil spring 17 is sandwiched between the flange portion 16b of the control shaft 16 and the left end surface of the boss portion 26 of the shaft holder 20. By this clamping, the compression coil spring 17 is compressed, and a biasing force that pushes the control shaft 16 back to the left acts on the control shaft 16. Therefore, the second reaction force load F with respect to the depression of the accelerator pedal 1 is caused by this urging force.
2 occurs.

First and second reaction force loads F1 and F2,
FIG. 7 shows the relationship with the accelerator pedal depression amount S. In this figure, the accelerator pedal 1 is in the state of S = 0.
Is released without depression, and the state of S = MAX is the state in which the accelerator pedal 1 is depressed most.
When S = 0, the throttle opening is fully closed, and when S = MAX, the throttle opening is fully opened (WO
The opening degree of the throttle valve 6 is controlled so as to be T).

In the figure, the solid line A represents the change characteristic of the first reaction force load F1, and the first reaction force load F1 generated by the torsion coil spring 19 has a certain value at the start of the depression of the accelerator pedal 1. Therefore, the pressure increases almost in proportion to the depression of the accelerator pedal 1. The second reaction force load F2 acts only when the accelerator pedal 1 is depressed by a predetermined amount S1, and thereafter increases as the accelerator pedal 1 is depressed as shown by a solid line B.

The sum of the first and second reaction force loads F1 and F2 is the reaction force load to the depression of the accelerator pedal 1, and this characteristic is the characteristic shown by the solid line A from S = 0 to S = S1. , S = S1 to S = MAX have the characteristics shown by the line C which is the sum of the characteristics of the solid lines A and B.
As a result, the reaction force load with respect to the depression of the accelerator pedal 1 gradually increases with the depression until the accelerator pedal 1 is depressed by a predetermined amount (S1), and increases relatively rapidly in response to the depression when the accelerator pedal 1 is depressed beyond the predetermined amount. It has the following characteristics. The characteristics of the solid lines A and B differ depending on the spring characteristics, and the characteristics themselves of the solid lines A and B can be changed by using springs having different spring characteristics.

As described above, the load setting device 10 of the present embodiment can be used to set the reaction force load characteristics as described above.
In this load setting device 10, it is possible to change the load characteristics more finely while using the same spring. This change of the load characteristic is performed by adjusting the mounting positional relationship among the right case 20, the shaft holder 25, the seal plate 28, and the hook bolt 30.

As shown in FIG. 6A, the right case 20 has a plurality of inner mounting screws 22 penetratingly formed along the circumference surrounding the central opening 20a and a circle surrounding the inner mounting screw 22. A plurality of outer mounting holes 21 formed through the circumference
Have and. A total of 24 outer mounting holes 21 are formed at equal intervals along the same pitch circle, and each mounting hole 21 has 15 holes.
It is formed at intervals. The hook bolt 30 is inserted into the mounting hole 21, and the nut 3 is screwed into the hook bolt 30.
It is clamped and fixed by 1. The one end 19a of the torsion coil spring 19 is locked to the hook bolt 30, but a mounting hole 21 for mounting the hook bolt 30 is provided.
By replacing the, the mounting position can be arbitrarily set in steps of 15 degrees. Therefore, the initial setting load of the torsion coil spring 19 can be adjusted accordingly. For example, when the mounting position of the hook bolt 30 is changed to a position where the initially set load of the torsion coil spring 19 is increased, the first reaction force load F1 characteristic can be changed as shown by the dotted line A'in FIG. ..

On the other hand, a total of 18 inner mounting screws 22 are formed at equal intervals along the same pitch circle, and each mounting screw 22 is formed at 20 ° intervals. This mounting screw 22
On the right side of the right case 20 using the shaft holder 25
And the seal plate 28 is fixed. The shaft holder 25 is, as shown in FIG.
There are three sets of four insertion holes 27, which are formed through the same pitch circle as 2 at intervals of 15 degrees, at equal intervals (at intervals of 120 degrees). In the seal plate 28, three insertion holes 29 are formed at equal intervals (120 degree intervals) along the same pitch circle as the inner insertion screw 22.

Therefore, the three bolts 35 are inserted into the insertion holes 29 of the seal plate 28 and the insertion holes 27 of each set of the shaft holder 25, and are screwed into the inner mounting screws 22. Therefore, the shaft holder 25
The seal plate 28 is fixed to the right case 20.

Here, the boss portion 26 of the shaft holder 25
The internal shaft spline 26a of the control shaft 16
Since the external tooth spline 16c of is engaged, the bolt 3
By changing the screwing position of the inner mounting screw 22 and the shaft holder 25 and rotating the shaft holder 25, the control shaft 16 can be rotated together, and the lateral movement position of the control shaft 16 can be adjusted. By this adjustment, the initial position of the control shaft 16 can be adjusted, and thus the amount of depression of the accelerator pedal until the compression of the compression coil spring 17 is started can be changed. For example, when adjustment is performed to move the initial position of the control shaft 16 to the right, as shown in FIG. 7, the compression of the compression coil spring 17 is started at the time when the depression amount of the accelerator pedal is S2, and the second reaction is performed. The force load characteristic F2 has a characteristic as shown by a dotted line B '. Therefore, the reaction load of the accelerator pedal has a characteristic as shown by a dotted line C '(when the characteristic of the torsion coil spring 19 is A) or a characteristic as shown by a dotted line C "(the characteristic of the torsion coil spring 19 is In the case of A ').

The rotational position of the shaft holder 25 can be adjusted by changing the inner mounting screw 22 with which the bolt 35 is screwed. However, since the inner mounting screws 22 are formed at intervals of 20 degrees, this is not the case. You can only adjust every 20 degrees. However, since the shaft holder 25 is formed with three sets of four insertion holes 27 at intervals of 15 degrees, the bolts 35 are inserted into the adjacent insertion holes 27, and the inner mounting screw 22 is also attached to the adjacent mounting screw 22. When screwed,
Fine adjustment is possible every 5 degrees. This is because if the mounting screw 22 with which the bolt 35 is screwed is moved to the adjacent screw 22, the shaft holder 25 is rotated 20 degrees, but the insertion hole 27 into which the bolt 35 is inserted also moves to the adjacent insertion hole 27. This is because the movement of 15 degrees is canceled by doing so, and the shaft holder 25 is rotated by the angle difference of 5 degrees.

As described above, if the load setting device 10 of this embodiment is used, the reaction force load characteristic with respect to the depression of the accelerator pedal can be variously changed or adjusted with only one device. In this example, the DBW control type throttle valve driving device has been described, but the present invention can be applied to a mechanical control type throttle valve driving device that mechanically connects an accelerator pedal and a throttle valve. This example will be described with reference to FIGS. 8 and 9.

In this throttle valve drive device, as shown in FIG. 8, the cable 2 connected to the tip of the lever 1a connected to the accelerator pedal 1 is the load setting device 1.
Connected to 0 '. The load setting device 10 'is also connected to the cable 4 connected to the tip of an arm 6b connected to the rotary shaft 6a of the throttle valve 6. Both cables 2, 4
Is the core wire 2a, 4a in the load setting device 10 '.
They are connected to each other, and the operation of the accelerator pedal 1 is transmitted to the arm 6b via both cables 2 and 4, and the throttle valve 6 is directly opened / closed corresponding to the operation of the accelerator pedal 1.

As shown in FIG. 9, this load setting device 10 'has the same load as shown in FIG. 1 except that there is no rotational position sensor and no drive gear is formed on the control drum 15'. It has almost the same configuration as the setting device 10. Therefore, the same parts as those of the load setting device 10 shown in FIG. The core wire 2a of the cable 2 and the core wire 4a of the cable 4 are wound around the cable winding groove 15c of the control drum 15 'of the load setting device 10'. Therefore, when the core wire 2a of the cable 2 is pulled in accordance with the operation of the accelerator pedal 1, the core wire 4a of the cable 4 is also pulled, and the opening / closing operation of the throttle valve 6 is performed. At this time, since the control drum 15 'is simultaneously rotated, the reaction force load with respect to the depression of the accelerator pedal is set in the same manner as the load setting device 10.

[0035]

As described above, according to the present invention,
A torsion coil spring that generates an urging force opposite to the rotation of the control drum due to the depression of the accelerator pedal, and generates a first reaction force load with respect to the depression of the accelerator pedal;
A throttle valve drive device having a compression coil spring that is compressed according to the axial movement of the control shaft caused by the rotation of the control drum due to the depression of the accelerator pedal, and generates a second reaction force load with respect to the depression of the accelerator pedal. Is configured, the load reaction force characteristic with respect to the depression of the accelerator pedal can be set by combining the characteristic of the torsion coil spring (first reaction force load characteristic) and the characteristic of the compression coil spring (second reaction force load characteristic). It is possible to set various characteristics by changing the characteristics of both springs. Especially, if the compression of the compression coil spring is started when the accelerator pedal is depressed by a predetermined amount, the reaction force load characteristics are set only by the torsion coil spring in the first half of the depression of the accelerator pedal, and both springs are combined in the latter half. It is also possible to set the reaction force load characteristics,
There is a high degree of freedom in setting the reaction force load characteristics, and it is easy to do so.

Further, in the case of this throttle valve drive device, a mechanism for generating the first and second reaction force loads is incorporated in the case, and this device is provided with a transmission system from the accelerator pedal to the throttle valve. If you install it somewhere inside, you can set the reaction load. Therefore, there are few restrictions on the installation position of the device, and its attachment is easy. In the transmission system from the accelerator pedal to the throttle valve, the valve drive means detects a rotational position of the control drum, a rotational position sensor, an electric actuator for controlling the opening / closing position of the throttle valve, and a rotational position sensor. Of the DBW control system, which comprises a controller that controls the operation of the electric actuator based on the rotational position signal detected by, or a valve drive means mechanically connects the control drum and the throttle valve with a link, a cable, or the like. Although there is a mechanical control system including connecting means, the present device can be easily attached in any system.

[Brief description of drawings]

FIG. 1 is a sectional view showing a load setting device used in a throttle valve driving device according to the present invention.

FIG. 2 is a sectional view showing a part of a throttle valve drive device according to the present invention.

FIG. 3 is a schematic view showing a throttle valve drive device according to the present invention.

FIG. 4 is a perspective view showing a load setting device used in the throttle valve driving device according to the present invention.

FIG. 5 is a perspective view showing the load setting device disassembled into its constituent parts.

FIG. 6 is a side view showing components of the load setting device.

FIG. 7 is a graph showing reaction force load characteristics set by this load setting device.

FIG. 8 is a schematic view showing a different example of the throttle valve drive device according to the present invention.

FIG. 9 is a cross-sectional view showing a different example of the load setting device used in the throttle valve driving device according to the present invention.

[Explanation of symbols]

 1 accelerator pedal 6 throttle valve 10 load setting device 15 control drum 16 control shaft 17 compression coil spring 19 torsion coil spring 25 shaft holder 50 rotational position sensor

Claims (6)

[Claims] 1. A device for transmitting an actuation of an accelerator pedal to a throttle valve to drive the throttle valve, comprising: a case; the case being rotatably disposed in the case and being mechanically connected to the accelerator pedal. And a control shaft which is rotated according to the operation of the accelerator pedal, a control shaft which is screwed into an inner diameter screw formed coaxially with the rotation shaft in the control drum, and the control shaft Is axially movable, but its movement in the rotational direction is restricted and engaged, and the opening / closing operation of the shaft holder fixed to the case and the throttle valve according to the rotation of the control drum is performed. A valve driving means for connecting the one end to the case and the other end to the control drum, A torsion coil spring that generates an urging force opposite to the rotation of the control drum due to the depression of the accelerator pedal, and generates a first reaction load against the depression of the accelerator pedal, the control shaft, the case, or the shaft holder. And a second compression member for compressing in response to the axial movement of the control shaft caused by the rotation of the control drum caused by the depression of the accelerator pedal.
And a compression coil spring that generates a reaction force load of the throttle valve drive device. 2. The connection position of one end of the torsion coil spring to the case can be adjusted, and the initial value of the first reaction force load at the start of depression of the accelerator pedal can be adjusted. The throttle valve drive device according to claim 1. 3. The throttle valve drive device according to claim 1, wherein the compression coil spring starts to be compressed when the accelerator pedal is depressed by a predetermined amount. 4. The mounting position of the shaft holder to the case can be adjusted, and the rotational position of the control shaft can be adjusted by adjusting the mounting position to adjust the compression start position of the compression coil spring. The throttle valve drive device according to claim 3, wherein: 5. The valve drive means comprises a rotary position sensor for detecting a rotary position of the control drum, an electric actuator for controlling an opening / closing position of the throttle valve, and a rotation position detected by the rotary position sensor. The throttle valve drive device according to claim 1, comprising a controller that controls the operation of the electric actuator based on a moving position signal. 6. The valve driving means comprises a connecting means for mechanically connecting the control drum and the throttle valve, and opens and closes the throttle valve according to the rotation of the control drum. The throttle valve drive device according to claim 1.