JPH039037A - Throttle control device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention A1 Object of the Invention (1) Industrial Application Field The present invention has a throttle valve rotatably supported on a support body and spring-biased in the closing direction of the throttle valve. The present invention relates to a throttle control device in which an operating lever interlocked with accelerator operation and a control lever interlocked with and connected to an actuator are connected to a throttle shaft.

(2) Prior Art Conventionally, such devices have been disclosed in, for example, Japanese Patent Application Laid-Open No. 63-80034.
It is known from the publication no.

(3) Problems to be Solved by the Invention By the way, the conventional control device described above has a throttle opening degree detector that detects the actual throttle opening degree and an accelerator operation amount detector that detects the accelerator operation amount. The operating amount of the actuator is determined based on the detected value of the rain detector, and the accelerator drum that is linked to the accelerator operation is fixed to the accelerator drum axis that is parallel to the throttle axis, and the accelerator drum and the throttle axis are connected. motion,
The accelerator operation amount detector is arranged to detect the amount of rotation of the accelerator drum shaft.

However, it is preferable that the accelerator operating force is directly applied to the throttle shaft, and it is desirable that the throttle shaft can be rotated at least toward the closing side even if a rotational failure of the accelerator drum shaft occurs.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a throttle control device that can reliably return the throttle shaft while detecting the actual throttle opening and accelerator operation amount. purpose.

B1 Structure of the Invention (1) Means for Solving the Problems According to the present invention, a detection shaft having an axis parallel to the throttle shaft is rotatably supported on a support, and an accelerator is provided between the detection shaft and the support. A detection lever includes a lost motion spring that biases the detection shaft in the return direction, a lost motion lever that is interlocked and connected to the operating lever, is supported by the detection shaft for relative rotation, and is fixed to the detection shaft. and the lost motion lever are respectively provided with engaging portions to engage with each other, and the relative positions of these engaging portions are set so that the spring force of the lost motion spring acts in a direction in which they engage with each other. An accelerator operation amount detector that detects the amount of rotation of the detection shaft and a throttle opening amount detector that detects the amount of rotation of the throttle shaft are attached to the support body.

(2) Effect According to the above configuration, when the operating lever rotates toward the throttle opening side in conjunction with accelerator operation, the throttle shaft rotates, and the rotation of the throttle shaft is transmitted to the lost motion lever and the detection lever. is transmitted to the detection axis via the Further, when the operating lever is rotated toward the throttle closing side, the rotation operating force is transmitted to the detection shaft via the lost motion lever, lost motion spring, and detection lever. Therefore, the accelerator operation amount detector can detect the rotation amount of the detection shaft, that is, the accelerator operation amount, and the throttle opening degree detector can detect the throttle opening degree. Furthermore, even if the rotational movement of the detection shaft is malfunctioning, by returning the operating lever to the throttle closing side, the lost motion lever can be rotated to the accelerator return side against the spring force of the lost motion spring.

(3) Example Hereinafter, an example in which the present invention is applied to a traction control device for a vehicle will be explained with reference to the drawings.6 First, in FIG. 1, FIG. 2, FIG. 3, and FIG. A throttle shaft 2 is rotatably supported on a throttle body 1 as a rotor through bearings 3 and 4, and a butterfly that opens and closes an intake passage 5 formed in the throttle body 1 is attached to the throttle shaft 2. A shaped throttle valve 6 is fixed.

Both ends of the throttle shaft 2 protrude from the throttle body 1 on both sides. A tenth motion lever 7 is fixed to one end side (left side in FIG. 3) of the throttle shaft 2 protruding from the throttle body 1, and
An operating lever 8 is supported so as to be relatively rotatable. Further, a control lever 9 is fixed to the other end of the throttle shaft 2 protruding from the throttle body 1 (on the right side in FIG. 3).

On one end side of the throttle shaft 2 protruding from the throttle body 1, there is a rectangular shape having a substantially rectangular cross-sectional shape by cutting out the outer periphery of the throttle shaft 2 so as to form a pair of flat surfaces along the -diameter line. A section 2a is provided. The rectangular portion 2a includes, in order from the proximal end to the distal end thereof, a cylindrical collar 10 whose inner end abuts against the bearing 3, and a basic collar 10 whose inner end abuts against the outer end of the collar 10. Disc-shaped regulation plate 1
1, and a cylindrical collar 1 whose inner end abuts against the regulation plate 11.
2 and the tenth stroke lever 7 are fitted together, and a nut 13 is screwed onto the outer end of the throttle shaft 2 protruding from the tenth stroke lever 7. As a result, the collar 10, the regulating plate 11, the collar 12, and the tenth motion lever 7 are fixed to the throttle shaft 2.

The operating lever 8 has a cylindrical portion 8 that coaxially surrounds the collar 10.
a, and a drum portion 8b fixed to the outer end of the cylindrical portion 8a.
and are attached to the collar 10 with the bearing 14 interposed therebetween. That is, the cylindrical portion 8a surrounds the collar 10 so that the axial position of the synthetic resin receiver that comes into contact with the outer surface of the throttle body 1 is regulated by the member 15 and the regulating plate 11. A bearing 14 is interposed between the cylindrical portion 8a and the collar 10. Further, a throttle wire 16 that is towed and driven by a throttle operation section (not shown) is wound around the drum section 8b.
An engagement piece 17 provided at the end of the throttle wire 6 is engaged with the drum portion 8b. Therefore, the operating lever 8 is rotated in the throttle valve opening direction shown by the arrow 18 in FIG. 2 by the pulling operation of the throttle wire 6 in response to the accelerator operation. Moreover, a coil-shaped first return spring 19 surrounding the cylindrical portion 8a is interposed between the operating lever 8 and the throttle body, and this first return spring 19 moves the operating lever 8 in a direction different from the arrow 18. The throttle valve is biased in the opposite throttle valve closing direction 20.

Between the operation lever 8 and the tenth motion lever 7, that is, the throttle shaft 2, the tenth motion lever 7, that is, the throttle shaft 2 is connected to the rotational movement of the operation lever 8.
In addition to following the throttle axis 2t? , K ie, 440 A lost motion mechanism 25 is provided that can prevent the rotational movement of the stroke motion lever 7 in the throttle valve closing direction 20 from affecting the operating lever 8.

This lost motion mechanism 25 includes an engaging arm portion 21 that extends toward the tenth stroke lever 7 and is provided on the drum 1I8b of the operation lever 8, and a tenth motion mechanism that does not engage with the engaging arm portion 21. It includes an engagement/arm portion 22 provided on the lever 7, and a tenth stroke motion spring 23 interposed between the operation lever 8 and the tenth stroke lever 7. Therefore, the relative positions of the image body combining arms 21 and 22 are as follows.
The spring force of the tenth spring 23 is set to act in the direction of mutual engagement.

According to such a lost motion mechanism 25, when the operating lever 8 is operated by the accelerator, the first and second return springs 1
When the 10th stroke motion lever 7 is rotated in the throttle valve opening direction 18 against the spring force of the 10th stroke motion spring 23, the 10th stroke motion lever 7 is rotated in the throttle valve opening direction 18 against the spring force of the 10th stroke motion spring 23. 2 rotates in the direction to open the throttle valve 6. Further, when the operating lever 8 is rotated in the throttle valve closing direction 20, the engaging arm 2
1 and 22, the tenth motion lever 7 and the throttle shaft 2 rotate in the throttle valve closing direction 20.

Further, between the operating lever 8 and the throttle body 1, there is a second
A return spring 24 is interposed.

The tenth motion spring 23 and the second return spring 24 are formed in a coil shape, and the receiver received by the tenth motion lever 7 is connected to the member 25 and the regulating plate 11.
A receiver received by the collar 12 is arranged coaxially surrounding the collar 12 between the member 26 and the collar 12 .

The members 25 and 26 of these receivers are made of synthetic resin and have color 1.
It is formed into a bottomed double cylindrical shape surrounding the 10th
Both supports of the shock motion spring 23 are arranged on the inner side between the members 25 and 26, and both receivers of the second return spring 24 are arranged on the outer side between the members 25 and 26. Therefore, the 10th motion spring 2
One end 23a+110 of 3 is engaged with the engagement arm 22 of the motion lever 7, and the other end 23b is engaged with the engagement arm 21 of the operation lever 8. Also, one end 2 of the second return spring 24
4a is engaged with the engagement arm 21, and the other end 24b is engaged with the throttle body I.

A bracket 26 is fixed to the throttle body 1, and a detection shaft 27 having an axis parallel to the throttle shaft 2 is supported on the bracket 26 so as to be rotatable about the axis. That is, the bracket 26 is provided with a cylindrical support portion 26a having an axis parallel to the throttle shaft 2, and the detection shaft 27 is rotatably supported by the cylindrical support portion 26a. This detection shaft 27 has a 20th stroke lever 2 which is interlocked and connected to the operating lever 8.
8 is supported for relative rotation, and a detection lever 29 that can be engaged with the 20th motion lever 28 is fixed.

At one end of the detection shaft 27 protruding from the cylindrical support portion 26a of the bracket 26, a small diameter male threaded portion 27a with a substantially rectangular cross-sectional shape is coaxially provided via a stepped portion 27b. 27a passes through the detection lever 29, making relative rotation impossible. Furthermore, a nut 30 is screwed onto the male screw aB27a protruding from the detection lever 3-29 in contact with the stepped portion 27b, and by tightening the nut 30, the detection lever 29 is fixed to the detection 127.

Further, the 20th motion lever 28 is connected to the bracket 2
6, the outer end of the cylindrical support part 26a and the detection lever 29 are relatively rotatable and are attached to the detection shaft 27. A circular plate portion 28b having a shape is fixed thereto. This 20th
The disk portion 28b of the stroke motion lever 28 and the drum portion 8b of the operating lever 8 are interlocked and connected to each other via a connecting link 31. The connecting link 31 is designed to rotate the 20th stroke motion lever 28 in the accelerator direction shown by the arrow 32 in response to the rotation of the operation lever 8 in the throttle valve opening direction 18. Both levers 8.28 are connected in order to rotate the 20th stroke motion lever 28 in the accelerator return direction 34, which is opposite to the accelerator direction 32, in response to rotation in the throttle valve closing direction 20. .

An engagement pin 33 having an axis parallel to the cylindrical support portion 26a is implanted in the bracket 26, and between the engagement pin 33 and the detection lever 29, the detection lever 29, that is, the detection shaft 27 is moved when the accelerator is released. A second rotary biasing in direction 34
A zero motion spring 35 is interposed. That is, the second
The 20th stroke motion spring 35 is formed into a coil shape surrounding the cylindrical support portion 26a, and one end 35a of the 20th stroke motion spring 35 is engaged with the detection lever 29, and the other end 35b is engaged with the engagement pin 33. be done.

The disc portion 28b of the 20th stroke motion lever 28 is provided with an engaging portion 36, and the detection lever 29 is provided with an engaging portion 37 that can be engaged with the engaging portion 36. Thus, the relative position of the image body joining portions 36 and 37 biases the spring force of the 20th stroke motion spring 35 interposed between the detection lever 29 and the engagement pin 33, that is, the detection lever 29 in the accelerator return direction 34. The spring forces are set to act in mutually engaging directions.

Therefore, when the 20th stroke motion lever 28 rotates in the accelerator direction 32 with the rotation of the operating lever 8 in the throttle valve opening direction 18, the detection lever 29 is moved in the accelerator direction by the engagement of the engaging parts 36 and 37. Rotate to 34,
Further, when the 20th stroke motion lever 28 rotates in the accelerator return direction 34 in conjunction with the rotation of the operation lever 8 in the throttle valve closing direction 20, the detection lever 29 is moved to return the accelerator by the spring force of the 20th stroke motion spring 35. The detection lever 29, that is, the detection shaft 27, rotates in response to the amount of rotation of the operating lever 8, that is, the amount of accelerator operation.

An accelerator operation amount detector 38 for detecting the amount of rotation of this detection shaft 27, that is, the amount of accelerator operation is connected to the bracket 26.
is supported and fixed. That is, an accelerator operation amount detector 38 is fixed to the bracket 26 so as to face the other end of the detection shaft 27, and a lever 39 fixed to the other end of the detection shaft 27 is connected to the accelerator operation amount detector 38. be done.

A cylindrical collar 41 is fitted to the base of the other end of the throttle shaft 2 protruding from the throttle body 1 so as to bring its inner end into contact with the bearing 4 . Moreover, a control lever 9 is provided at the other end of the throttle shaft 2 that protrudes from the collar 41.
is fixed. Further, a driven gear 43 is rotatably supported on the collar 41 via a bearing 42, and this driven gear 43 is rotated in the throttle valve closing direction 20 by a third return spring 44 interposed between it and the throttle body l. It is urged to rotate and is engaged with the control lever 9 . A bracket 45 fixed to the outer surface of the throttle body 1 supports and fixes a throttle opening detector 46 facing the other end of the throttle shaft 27, and the control lever 9 is attached to the other end of the throttle shaft 2. A lever 47 fixed together with the throttle opening detector 46 is connected to the throttle opening detector 46 . Therefore, the amount of rotation of the throttle shaft 27, that is, the opening degree of the throttle valve 6 is detected by the throttle opening degree detector 46.

A support shaft 48 having an axis parallel to the throttle shaft 2 is supported between the throttle body 1 and the bracket 45. An intermediate gear 49 that meshes with the driven gear 43 is mounted on this support shaft 48 via a bearing 50. Rotatably supported.

Furthermore, the intermediate gear 49 is biased in the direction of being thrust supported by the bracket 45 by a spring 51 interposed between the intermediate gear 49 and the outer surface of the throttle body 1 to regulate its axial position.

A pulse motor 52 as an actuator is supported on the bracket 45 , and a drive gear 54 fixed to an output shaft 53 of the pulse motor 52 is meshed with the intermediate gear 49 . Therefore, the operation of the pulse motor 52 rotationally drives the throttle shaft 2 via the drive gear 54, the intermediate gear 49, the driven gear 43, and the control lever 9. Moreover, the pulse motor 52 operates to rotate the throttle shaft 2 only in the throttle valve closing direction 20, and operates the pulse motor 52 when the throttle valve 6 is opened to the desired opening degree by operating the accelerator. As a result, the throttle valve 6 is rotationally driven in the closing direction.

At this time, the throttle shaft 2 is connected to the 10th stroke motion spring 2.
Since the engaging arms 21 and 22 are rotated in the throttle valve closing direction 20 while being separated from each other against the spring force 3, the throttle wire 16 is not affected.

A dashpot 56 is supported and fixed to the throttle body 1 to slow down the rotational movement of the tenth stroke motion lever 7 supported on the throttle shaft 2 in the throttle valve closing direction 20. This dashpot 56
This is a conventionally well-known device, in which a periphery of a diaphragm 600 that partitions the inside of the pufferfish 5 into a suction chamber 58 and an atmospheric pressure chamber 59 is held in a housing 57, and a large portion is provided in the center of the diaphragm 60. Housing 5 on the pressure chamber 59 side
One end of a connecting rod 61 that movably penetrates through 7 and extends outward is connected via a retainer 80 . housing′
A suction pipe 81 communicating with the suction chamber 58 is connected to the suction pipe 57, and this suction pipe 81 is opened to the atmosphere via a jet 82 at its tip.

Therefore, when attempting to drive the connecting rod 61 to deflect the diaphragm 60 in a direction that increases the volume of the suction chamber 68, a force in the opposite direction to the driving direction is applied to the connecting rod 61 due to the action of the jet 82. Become.

On the other hand, there is a throttle shaft 2 on the outer surface of the throttle body 1.
A support bolt 62 having an axis parallel to is screwed onto the support bolt 62, and a regulation lever 63': J6 and a forced activation lever 64 are rotatably supported on this support bolt 62. That is, between the head 62a of the support bolt 62 and the throttle body 1, the support bolts 62 are arranged in order from the head 62a side.
a cylindrical collar 65 that surrounds the support bolt 62; a disc-shaped regulation plate 66 that abuts the inner end of the collar 65; and a cylindrical collar 67 that surrounds the support bolt 62 with its outer end abutting the regulation plate 66. , and a regulating plate 68 interposed between the inner end of the collar 67 and the throttle body 1 are fitted in this order, and by tightening the support bolt 62, the collar 65, regulating plate 166, collar 67, and regulating plate 68 are fitted in order. A plate 68 is secured to support bolts 62. The regulation lever 63 is connected to the head 6 of the support bolt 62.
The forced activation lever 64 is rotatably supported by a collar 65 between the regulation plate 66 and the regulation plate 66.
It is rotatably supported by a collar 67 between 8 and 8.

The regulation lever 63 includes an adjustment screw 6 whose tip can come into contact with a contact arm 70 provided on the tenth motion lever 7.
'9 are screwed together so that their advancing and retracting positions can be adjusted.
They are set to abut each other in response to rotation toward zero. Further, the throttle body 1 is provided with an adjustment screw 71 that comes into contact with the contact arm 70 when the tenth motion lever 7 rotates to the position where the throttle valve 6 is fully opened. will be combined.

2 The other end of the connecting rod 61 in the dashpot 56 is connected to the regulation lever 63, and the connection mode is as follows.
When the tenth motion lever 7 rotates in the throttle valve closing direction 20 while the adjustment screw 69 is in contact with the contact arm 70, the diaphragm 60 to which the connecting rod 61 is connected moves into the suction chamber 58. It is set to flex in the direction of increasing volume.

The forced activation lever 64 is provided with an abutment arm 72, and an adjustment screw 73 whose tip can be brought into contact with the abutment arm 72 is screwed into the regulation lever 63 so as to be able to adjust its forward and backward positions. The relative positions of the abutment arm 72 and the adjustment screw 73 are determined in the direction in which the abutment arm 72 abuts the adjustment screw 73 due to the spring force of the spring 74 interposed between the throttle body l and the forced activation lever 64. It is set to be energized. This spring 74 has a spring force that urges the tenth stroke motion lever 7 in the throttle valve opening direction 18 via the restriction lever 63 that is in contact with the forced activation lever 64 by the contact arm portion 72 and the adjustment screw 73. When the operating lever 8 rotates from the fully open position of the throttle valve 6 in the throttle valve opening direction 18, the regulation lever 63 and the forced activation lever 64 follow and rotate due to the spring 74. When the retainer 80 of the dashpot 56 comes into contact with the inner surface of the housing 57 on the suction chamber 68 side, the adjustment screw 6
The contact state between the contact arm 9 and the contact arm 70 is released.

In FIG. 5, an operating lever 8 and a forced activation lever 6 are shown.
4, when the operation lever 8 located at the position corresponding to the fully closed position of the throttle valve 6 is rotated in the throttle valve opening direction 18, the forced activation lever 64 is forcibly rotated, and the regulation lever 63 is rotated. A forced activation mechanism 75 is provided which forcibly rotates the tenth motion lever 7 or the throttle shaft 2 in the throttle valve opening direction 18 through the throttle valve opening direction 18.

The forced activation mechanism 75 has a pressure receiving surface 76 provided on the side surface of the forced activation lever 64, and is pivotally supported by the operating lever 8 with an axis parallel to the throttle shaft 2 so as to roll along the pressure receiving surface 76. It consists of a roller 77. Moreover, the pressure receiving surface 76'
J6 and roller 77 are the throttle valve 6 of the operating lever 8.
The position corresponding to the fully closed position and the position where the throttle valve is slightly rotated in the opening direction 18 from that state are set so as to contact each other, and the pressure receiving surface 76 is connected to the operating lever. The roller 77 is configured to rotate the forced activation lever 64 in the throttle valve opening direction 18 in response to the rotation of the throttle valve 8 in the throttle valve opening direction 18 from the fully closed position.

Next, the operation of this embodiment will be explained. When the operating lever 8 is rotated in the throttle valve opening direction 18 by operating the accelerator 5 with the operation of the pulse motor 52 stopped, the engagement arms 21, 22 Due to the engagement, the tenth motion lever 7, that is, the throttle shaft 2, is rotated in the throttle valve opening direction 18, and the throttle valve 6 is rotated in the throttle valve opening direction 18 to a desired opening degree.

At this time, the pulse motor 52 is in a freely rotatable state, and in response to the rotational movement of the throttle valve 6 in the opening direction, the pulse motor 52 also rotates via the control lever 9 and each gear 43, 48° 53. Power is transmitted, and the pulse motor 52 rotates freely.

The rotational movement of the operation lever 8 in response to the accelerator operation is also transmitted to the 20th stroke motion lever 28 via the connecting link 31, and the detection lever 29, that is, the detection Axis 27 is in the accelerator direction 32
Rotate to. Therefore, the amount of rotation of the throttle shaft 2, that is, the throttle opening can be detected by the throttle opening detector 46, and the amount of rotation of the operating lever 8, that is, the amount of accelerator operation can be detected by the accelerator operation amount detector 38. can.

By the way, at the initial stage of rotating the throttle valve 6 from its fully open position in the throttle valve opening direction 18,
If only the operating lever 8 and the tenth motion lever 7 are interlocked and connected via the lost motion mechanism 25, the starting force of the throttle shaft 2 will be insufficient, and the initial rotational movement of the throttle shaft 2 will not be smooth. There are cases. However, due to the action of the forced activation mechanism 75, the initial rotational movement of the throttle shaft 2 is forcibly performed. That is, when the operating lever 8 rotates to rotate the throttle valve 6 from its fully closed position, the roller 77 comes into contact with the pressure receiving surface 76 and shifts, thereby rotationally driving the forced activation lever 64. The rotation of 64 is caused by the adjusting screw 73 on the contact arm 72.
The force is transmitted to the regulating lever 63 which is in contact with the regulating lever 63 via the regulating lever 63, and is further transmitted to the tenth motion lever 7 which has an abutting arm portion 70 which abuts the adjusting screw 69 of the regulating lever 63. Therefore, when the operating lever 7 is initially rotated, the first
The zero stroke motion lever 7 is forcibly rotated, and the initial rotational movement of the throttle shaft 2, that is, the throttle valve 6 from the fully open position becomes smooth.

Further, when the throttle valve 6 is rotated by the operation lever 8 to the opening degree, the throttle shaft 2, that is, the throttle valve 6 is provided with the first, second, and third return springs 19, 24, .
A spring force of 44 is acting on the closing side. Therefore, by relaxing the pulling force of the throttle wire 16, the operating lever 8 rotates in the throttle valve closing direction 20, and the throttle shaft 2 and the throttle valve 6 also rotate in the closing direction.

At this time, when the throttle valve 6 rotates to the vicinity of its fully open position, the retainer 80 is inserted into the suction chamber 5 in the dashpot 56.
After the adjustment screw 69 of the regulation lever 64 comes into contact with the contact arm 70, the resistance force of the dashbot 56 due to the increase in the volume of the suction chamber 68 reaches the 10th stroke. Acting on the motion lever 7, the rotational speed of the throttle shaft 2 and the throttle valve 6 toward the closing side is moderately suppressed.

Further, when the operation lever 8 is rotated 2 degrees in the throttle valve closing direction, the detection shaft 27 connected to the accelerator operation amount detector 38 via the lever 39 may be damaged due to malfunction of the accelerator operation amount detector 38. Assume a case where it does not rotate smoothly. In this case, the operating lever 8 rotates the 20th stroke motion lever 28 in the accelerator return direction 34 while resisting the spring force of the 20th stroke motion spring 35 and separating the surface engaging portions 36 and 37 from the 29. Therefore, the throttle valve 6 can be reliably rotated to the closing side.

As mentioned above, when the throttle valve 6 is opened to a certain opening degree by accelerator operation and the throttle valve 6 is driven to the closed side for traction control during start and acceleration, etc., the pulse motor 52 is activated. urge By this operation of the pulse motor 52, the throttle shaft 2 and the throttle valve 6 are moved to the first position so that the engaging part 21 of the operation lever 8 and the engaging part 22 of the tenth stroke lever 7 are separated.
It can rotate against the spring force of the zero stroke motion spring 23, and the throttle valve 6 can be driven in the closing direction regardless of accelerator operation.

In addition to the traction control device of the above-described embodiment, the device of the present invention also includes a control device that prevents the vehicle running speed from exceeding an upper limit value, and a device that reduces the throttle opening when the transmission shifts to zero. It can also be applied to control devices etc.

C0 Effects of the Invention As described above, according to the present invention, the detection shaft having an axis parallel to the throttle shaft is rotatably supported on the support, and the detection shaft is disposed between the detection shaft and the support in the accelerator return direction. A lost motion lever is interposed with a biasing lost motion spring, and is interlocked and connected to the operating lever. The lost motion lever is rotatably supported on the detection shaft, and the detection lever and the lost motion lever are fixed to the detection shaft. are provided with engaging portions to engage with each other, and the relative positions of these engaging portions are set so that the spring force of the lost motion spring acts in the direction of mutual engagement, and the support body includes: An accelerator operation amount detector that detects the amount of rotation of the detection axis and a throttle opening degree detector that detects the amount of rotation of the throttle axis are attached, making it possible to detect the accelerator operation amount and throttle opening amount respectively. At the same time, the throttle shaft can be reliably driven to the closing side regardless of malfunction of the accelerator operation amount detector.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a front view, FIG. 2 is a view from the ■ arrow in FIG. 1, and FIG.
4 is a sectional view taken along the line -I, FIG. 4 is a sectional view taken along the line ■-V in FIG. 2, and FIG. 5 is a sectional view taken along the line -V in FIG. DESCRIPTION OF SYMBOLS 1... Throttle body as a support body, 2... Throttle shaft, 6-... Throttle valve, 8... Operating lever 9... Control lever, 20... Throttle valve closing direction, 27...・Detection axis, 28... Lost motion lever 34... Accelerator return direction, 35... Lost motion spring, 36.37... Engagement part, 38... Accelerator operation amount detector, 46...・Throttle opening detector, 5232

Claims (1)

[Claims] A throttle shaft that has a throttle valve, is rotatably supported by a support body, and is biased by a spring in the closing direction of the throttle valve, has an operating lever that is linked to accelerator operation, and a control that is linked and connected to an actuator. In the throttle control device connected to the lever, a detection shaft having an axis parallel to the throttle shaft is rotatably supported on a support body,
A lost motion spring that biases the detection shaft in the accelerator return direction is interposed between the detection shaft and the support, and a lost motion lever that is interlocked and connected to the operating lever is supported by the detection shaft so as to be relatively rotatable. The detection lever and the lost motion lever, which are fixed to the detection shaft, are each provided with an engaging portion to engage with each other, and the relative positions of these engaging portions are determined so that the spring force of the lost motion spring engages with each other. The support body is equipped with an accelerator operation amount detector for detecting the rotation amount of the detection shaft and a throttle opening degree detector for detecting the rotation amount of the throttle shaft. Features a throttle control device.