JPH0350343A - throttle control device - Google Patents

Abstract

PURPOSE:To enhance the dependability of operation by applying the constitution wherein there is provided a forced turning lever forcibly turned when an operation lever is turned toward a throttle valve open direction, and a throttle shaft is turned upon turning the aforesaid turning lever via a lost motion lever. CONSTITUTION:A lost motion lever 7 is fixed to one end of a throttle shaft 2 having a throttle valve 6 fixed and projected from a throttle body 1, and an operation lever 8 interlocked with accelerator operation is so supported thereon as to be capable of turn. In addition, a lost motion spring 23 is provided in a space between both levers 7 and 8. In the aforesaid control device, a forced startup lever 64 is provided, and this lever 64 and the operation lever 8 are interlocked with each other via a forced startup mechanism 75 comprising a cam surface 76 and a roller 77 for forcibly turning the lever 64 when the operation lever 8 at a position corresponding to the full close position of the throttle valve 6 is turned toward a valve open direction, and for thereby turning the throttle shaft 2 toward a valve open direction via the lever 7.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a throttle having a butterfly-type throttle valve, rotatably supported on a support body, and biased by a spring in the closing direction of the throttle valve. A control lever is connected to the shaft, and the control lever is movable and connected to the accelerator operation. A lost motion lever fixed to the throttle shaft is connected to a lost motion lever that is fixed to the throttle shaft so as to engage the operating lever in response to the rotation of the throttle valve in the closing direction. The present invention relates to a throttle control device equipped with a loss i-motion spring.

[Conventional technology]

Conventionally, such a device is known, for example, from Japanese Patent Laid-Open No. 6380034.

[Problem to be solved by the invention]

However, in such a throttle control device, the operating lever and the lost motion lever are interlocked and connected via the lost motion spring at the initial stage when the throttle valve is rotated from the fully closed position to the throttle valve opening direction. This is in case the starting force of the throttle tube is insufficient and the initial rotational movement of the throttle tube is not smooth.

Therefore, an object of the present invention is to force the lost motion lever to fully close the throttle valve in response to the initial rotational movement of the operating lever from the throttle valve fully closed Z-1 position to the throttle valve opening direction. It is an object of the present invention to provide a throttle control device which is equipped with a mechanism for initially rotating the throttle valve in the direction of opening the throttle valve from a corresponding position, and whose operation reliability is increased as much as possible.

[Means to solve the problem]

In order to solve the above-mentioned problems, in the present invention, the butterfly type throttle valve is provided with an automatic rotation lock on the support body. :
An operating lever interlocked with accelerator operation is supported in a relatively rotatable manner on the throttle lever supported by the throttle valve and biased by a spring in the closing direction of the throttle valve. In response to the rotation of the operating lever in the throttle valve closing direction, there is a gap between the operating lever and the lost motion lever fixed to the throttle lever to engage the lever. , the operation lever and the loss motion lever are engaged in the h''direction; The forced start lever is rotatably supported, and the forced start lever and the operation lever are rotated in one direction in response to the initial rotation movement of the operation lever from the throttle valve fully closed position to the throttle valve opening direction. The forced activation lever and the lost motion lever are connected via a cam mechanism consisting of a roller provided on the operation lever and a cam surface provided on the forced activation lever, and the forced activation lever and the lost motion lever are rotated in the negative direction of the forced activation lever. Depending on the movement, the lost motion lever is connected to prevent initial rotation from the throttle valve fully closed position to the throttle valve opening direction.
Furthermore, a thrower I/small control device is provided in which a dust seal is provided on the sliding surface of the forced start lever and the throttle shaft fixed to the support in 14 rows.

[A'1/1] As mentioned above, in the present invention, the support is provided with a force-starting lever or a throttle shaft that prevents rotation about an axis descending from the throttle shaft.
The forced start lever and the operating bar are supported in a manner that allows the forced start lever to open in response to the initial rotation movement of the operation lever from the throttle valve fully closed position to the throttle valve opening direction. - direction, the forced activation lever and the lost motion lever are connected via a cam mechanism consisting of a roller provided on the control lever and a cam surface provided on the forced activation lever. The lost motion lever is connected to prevent initial rotation from the throttle valve fully closed position to the throttle valve opening direction when the throttle valve is rotated in one direction. When the roller rotates, the roller comes in contact with the cam surface and moves, causing the forced activation lever to move at the same time, and in response to this rotation, the lost motion lever is forcibly driven to rotate, and the throttle lever and therefore the throttle valve are fully opened. The initial rotation movement from the position becomes smooth. Furthermore, a Das I seal is provided on the sliding surface of the forced start lever and the descending shaft of the throttle shaft fixed to the support, which prevents foreign matter from entering the sliding portion, thereby preventing the cam from entering. The reliability of operation of the machine (Ill) is increased as much as possible.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. First, in FIGS. 1, 2, 3, and 4,
A throttle shaft 2 is supported by a rotatable motor (1) via bearings 3 and 4 on a throttle body (as a support body).
The throttle shaft 2 has a butterfly-type throttle valve 6 that opens and closes the intake passage 5 formed in the throttle body 1.
The same is true.

Both ends of the throttle shaft 2 protrude from the throttle body 1 on both sides, and one end of the throttle shaft 2 protruding from the throttle body 1 (the left end in FIG. 3) has a 10th
The throttle lever 7 is rotated 1" if 'if, and the operating lever 8 is rotatably supported. Also, the other end of the throttle lever 2 protruding from the thrower body 1 (see FIG. A control lever 9 is located on the right end (right end).

An engaging portion 2a is formed at one end of the throttle lever 2 protruding from the throttle body 1 and extends through one flat curve along the axis. The engaging portion 2a has, in order from its inner end, that is, the end closer to the throttle body 1, to its outer end, that is, the end that is farther from the throttle body 1.
A cylindrical collar 10 whose inner end is in contact with a bearing 3, and a collar 1
0, a cylindrical collar 12 whose inner end is in contact with the regulation plate, and a tenth strike motion lever 7 which is in contact with the outer end of the collar 12. We are in a relationship. A nut 13 is screwed onto the outer end of the throttle shaft 2 protruding from the 10th stroke motion lever 7, and the collar 10, the regulating plate 11, the collar] 2 and the 10th stroke motion lever 7 are connected to the throat I/le shaft. It has been identified as 2.

The operating lever 8 has a cylindrical portion 8 that coaxially surrounds the collar 10.
a, and a drum part 8b fixed to the outer end of the cylindrical part 8a, and the cylindrical part 8a is connected to the collar 1 through a bearing]4.
It is pivoted by 0.

Further, the position of the cylindrical portion 8a in the direction of the synthetic resin abutting against the outer surface of the throttle body 1 is regulated by a wave phase 15 and a regulating plate 1. The drum part 8b has J in the figure.
A throttle wire 6 that is pulled and driven by a throttle operation unit such as an accelerator pedal is wound around the throttle wire 16, and an engagement piece 17 provided at one end of the throttle wire 16 engages with the drum portion 8b. Therefore, the operating lever 8 is rotated in the direction of the throttle valve opening horn indicated by the arrow 18 in FIG. 2 by the pulling operation of the throttle wire 16 in response to the accelerator operation. In addition, as mentioned above, the collar 10 is not fixed to the throttle body] but is fixed to the throttle shaft 2, and the cylindrical portion 8a of the operating lever 8 is pivotally supported to the collar 10 via the bearing 14. Even in this case, the operating lever 8 can be rotated integrally with the throttle lever 2. In other words, reliable operation of the lever 8 is ensured.

A cylindrical portion 8a is located between the drum portion 8b and the throttle body 1.
A coiled first return spring 19 surrounding the control lever 8 is interposed, and this first return spring 19 moves the operating lever 8 in the direction indicated by the arrow 1.
The throttle valve is energized in the throttle valve closing direction 20, which is opposite to the direction 8.

Between the operating lever 8 and the 10th strike motion lever 7, the 10th strike motion lever 7 follows the rotation of the operating lever 8, and the throttle valve closing direction of the 10th strike motion lever 7 is connected. 11. Preventing the forced rotation of the operating lever 8 from affecting the operation of the operating lever 8. A lost motion mechanism A is provided. The lost motion mechanism A includes engaging arm portions 21a, 21b provided on the drum portion 8b of the operating lever 8;
10th motion lever 7 to engage with b.
The engaging arms 22a and 22b provided on the operating lever 8
and the tenth motion lever 7, the first
0 stroke motion spring 23, and an engaging arm portion 21a.
, 2'2B are biased by the tenth motion spring 23 in the direction of mutual engagement.

Further, a second return spring 24 is interposed on the outside of the tenth motion spring 23 to bias the operating lever 8 in the throttle valve closing direction 20.

Tenth motion spring 2 and second return spring 2
4 is formed into a coil shape, and the 10th] 0 strike motion lever 7 has a wave phase 25a, and the stop motion lever 7 has a wave phase 25b between the wave phase 25b.
2 coaxially surrounding it. Uke is Beko 42'5
a and 25b are constructed as a white-bottomed double circle made of synthetic resin that coaxially surrounds the collar 12, and the 10th storm cylinder spring 23 has a bearing of 1.1 of the wave phases 25a and 25b. -J, and the second return spring 24 has a wave phase 25a,
They are each fitted onto the outer cylinder of 25b. Uke is +42
As shown in FIG. 6, the double cylindrical portions 5a and 25b have
A plurality of notches 25a'2 each extending in the circumferential direction and in the axial direction.
5b' is formed, and the sliding resistance of the lost motion spring 23 and the second return spring 24 is reduced by reducing the contact area between the surfaces of the inner and outer cylinders and the lost motion spring 23 and the second return spring 24. Lost motion spring 23, n crouching in the second return spring 24, +1 prisoner's escape 6n
Safety measures are being taken. In this embodiment, as shown in FIG.
Although it is separated in the axial direction of ll12, the receiver has a wave phase 25a
, 25b as the thrower] 1 may be butted against the axis of the torsion 2. By butting both springs together, the deformation of the lost motion spring 2゛3 and the second spring 24 during operation causes both springs to become
This prevents the occurrence of the °j1 state in which the

One end 23a of the tenth motion spring 2'3 is the tenth motion spring 2'3.
It engages with the engagement arm 22a of the strike motion lever 7, and the other end 2'3b engages with the engagement arm 21a of the drum section 8b. Further, one end 24a of the second return spring 24 is connected to the engaging arm portion 2.
1a, and the other end 24b engages with the throttle body 1.

Such a lost motion machine It1117 A lAccordingly, 1.￥: 1st and 23rd Y5 L Hane IQ, 24 by accelerating f + lever 8.
When the tenth stroke motion lever 7 is rotated in the throttle valve opening direction]8 by the biasing force of the tenth stroke motion spring 23, the tenth stroke motion lever 7 is rotated in the throttle valve opening direction 1.
8, and rotates in the direction to open the throttle valve 2 or the throttle valve 6. Further, when the operating lever 8 is rotated in the direction of closing the throttle valve, the engaging arm portions 21a and 21b engage with the engaging arm portions 22a and 22b, respectively. 2 closes the throttle valve and rotates 2 degrees.

As mentioned above, by providing two sets of engaging parts for the operation lever 8 and the lost motion lever 7, even if the engaging part -h becomes unable to engage due to some reason such as 111f, the other engaging parts cannot be engaged. The engagement between the operating lever 8 and the lost motion lever 7 is ensured by the hem. The reliability of the rotation of the throttle lever 2 by the rotation operation of the operating bar 8 is improved.

A bracket 26 is fixed to the throttle body 1. The bracket 26 is formed with a circular support portion 26a that connects the axis of the throttle lever 2 and the 11th line.
The detection shaft 27 is rotatably supported by the cylindrical support portion 26a. The detection shaft 27 has a 20th strike motion lever 28 which is interlocked and connected to the operating lever 8 (rotation II).
It is supported by Noh. 20th strike motion lever 28
At the outer end of the detection shaft 27 that protrudes, that is, at the end h' far from the throttle body 1, a small-diameter male threaded portion 27a with a substantially rectangular cross section is coaxially formed with a stepped portion 27b interposed therebetween.

The constriction portion 27a passes through the detection lever 29, which can be engaged with the 20th strike motion lever 28, in a relatively unrotatable manner, and the spring portion 27a protrudes from the two detection levers.
The detection lever 29 is fixed to the detection shaft 27 by tightening the nut 30 screwed into the part a and pushing the detection lever 20 onto the stepped portion 27b.

Ru.

The 20th strike motion sensor 28 has a circular ↑-'' portion 28a surrounding the tl axis 27, and a circular disk portion 28 formed at the inner end of the cylindrical portion 28a, that is, at the end closer to the throttle body 1.
b, and the circle T5j support part 26a of the bracket 26
The detection lever 29 is rotatably attached to the detection shaft 27 between the outer end of the throttle body, that is, the end farthest from the throttle body, and the detection lever 29. Disk portion 28b of the 20th strike motion lever 28
and the tram portion 8b of the operating lever 8 are the cam machine hs”i
It is interlocked and connected to the phase 11- via B. This cam machine j:lB has an arm portion 28b projecting from the outer end side of the 11 plate portion 28b, that is, the end side of h that is far from the throttle body 1.
, and the engagement pin 28b 1 provided in the
The first cam 3 protrudes from the outer end of the drum portion 8b, that is, the end of Jj far from the throttle body] to engage with the first cam 3.
1a, an engaging pin 28b2° provided on the arm portion 28b protruding from the inner end side of the disc portion 28b, that is, the end side closer to the thrower I/body 1, and a drum portion to engage with the engaging pin 28b22. 8b, that is, the end closer to the throttle body 1. The cam mechanism B is configured to control the operation (throttle valve opening direction 18 of the lever 8).
levers 8 and 28 in order to rotate the 20th strike motion lever 28 in the direction of the accelerator indicated by arrow 32 in response to the rotation.
It connects. In the cam mechanism B, unlike the case of the rod link, the driving link, that is, the operating lever 8, and the driven link, that is, the 20th gear motion lever 28 are separated from each other. Therefore, an interlocking/coupling mechanism should be established between the two;
1, a high degree of freedom can be obtained.

In addition, two cams -31a and 31b are provided, and when the rotation angle of the operating lever 8 in the throttle valve opening direction 18 is small, the cam 31a is used, and when the rotation angle is large, the cam 3]b is used. The 20th stroke motion lever 28 is rotated in the accelerator direction 32 via the
+'t('l A linear relationship between the rotation of the lever 8 and the rotation of the 20th strike motion lever 28 is ensured. In this embodiment, the number of cams is two or more cams are used. By providing this, the linear relationship between the rotation of the operating lever 8 and the rotation of the 20th strike motion lever 28 can be further enhanced.

As shown in FIGS. 1 and 2, the bracket I.26 has an engaging pin 3 having an axis parallel to the circular support portion 26a.
3 is implanted, and a 20th motion spring 35 is interposed between the engagement pin 33 and the detection lever 28 to bias the two detection levers and the detection shaft 27 to rotate in the accelerator return direction 34. ing. The 20th strike motion spring 35 is formed in a coil shape surrounding the If, ii support portion 26a, and one end 5a of the 20th strike motion spring 35 is connected to the detection lever 29.
The other end (35a) is engaged with the engagement pin (3:3).

Disk portion of the 20th strike motion lever 28] 0 28b is provided with an engaging portion 36, and the detection lever 28b is provided with an engaging portion 36.
0 is provided with an engaging portion 37 that can engage with the engaging portion 36. The engaging portion 7 is connected to the detection lever 20 and the engaging pin 3.
'3 is biased in the direction of engagement with the engaging portion 36 by the 20th strike motion spring 35 interposed between the two.

Therefore, when the 20th I-motion lever 28 is rotated in the accelerator saw direction 32 as the operating lever 8 is rotated in the throttle valve opening direction 18, the engaging portion 36
, 37, the detection lever 29 overcomes the biasing force of the 20th stroke motion spring 35 and moves in the accelerator direction 32.
The operating lever 8 is rotated in the throttle valve closing direction 2.
When the detection lever 29 is rotated to 0, the detection lever 29 is rotated in the accelerator return direction 34 while pushing the 20th stroke motion lever 28 due to the urging force of the 20th stroke motion spring '35. The detection lever 29 and, in turn, the detection shaft 27 rotate in response to the amount of rotation, λ·l, that is, the amount of accelerator operation. On the other hand, an accelerator operation amount detector 38 is fixed to the bracket 26 facing the inner end of the detection shaft 27, that is, the end closer to the throttle body.
A lever '30 fixed to the inner end of the accelerator
1. OX Kyoude'A: Connected to 43H.

The other end of the throttle shaft 2 protruding from the throttle body 1 is fixed to the throttle body 1 and pivoted to a cylindrical collar 41 whose inner end abuts the bearing 4. The control lever 9 is fixed to the protruding end of the throttle shaft 2 protruding from the throttle shaft 2. Also color 4
1, a wave gear 4'3 is rotatably supported via a bearing 42. With this configuration, even if the bearing 42 becomes stiff, the wave gear 4'3 can be rotatably supported on the throttle shaft 2. For example, when the driven gear 43 is supported on the throttle shaft via a bearing, the throttle shaft and the driven gear become one body due to the circumference of the bearing.
(wave gear and other gears connected to it) may act as resistance, making it impossible to rotate the throttle shaft, that is, rotate the throttle valve, or with the above configuration, it is impossible to avoid such a situation. I can do 8. In addition, the collar 41 is separated from the throttle body 1 in 1.1. By making the i7. Even if the collar 41 develops a bearing as the collar 41 matures, it can be easily repaired by replacing only the collar 41.

The wave gear 43 is engaged with the control lever 9 when the wave gear 43 rotates in the throttle valve closing direction. The wave gear 4'3 is connected to the throttle body co.
A backlash spring 44 is interposed, and the wave gear 4'3 is
The throttle valve opens in the direction 18 by the ``3'' spring 44.
It is rotated and energized.

Further, the outer surface of the wave gear 43, that is, the end surface on the fast side from the throttle body 1, is in contact with a regulating plate 101 fixed to the collar 41, and the wave gear 4'3 is moved along the axis by the third return spring 44. In addition to being energized in the direction, the slab I is supported by the regulating plate [0], and its axial position is regulated.

A bracket 45 is fixed to the outer surface of the throttle body 1, and between it and the throttle body 1, there is provided a gabo-socket which accommodates the wave gear 4'B, an intermediate gear (described later), and a drive gear 54. [1
2 has been removed.

A throttle opening detector 46 is supported and fixed on the bracket I-45 at a position opposite to the other end of the throttle shaft 7. A fixed lever 47 is connected with the control/<-9.

Therefore, the amount of rotation of the throttle lever 2, that is, the opening degree of the throttle valve 6, is detected by the throttle opening degree detector 46.

Between [Slowa I. Reporti] and Brilliant 45,
Throttle levers 2 and 1', spindle 4 that aligns the iJ axis
8 is supported, and the wave gear 4 is supported on this support shaft 48.
The four intermediate gears that mesh with the throttle body 1 are supported by a rotation amount (1 degree) through bearings 50. A spring 51 is interposed between the intermediate gear 49 and the outer surface of the throttle body 1.
The intermediate gear 49 is biased 1114 times in the axial direction by the spring 4 and is thrust supported by the bracket 45.
Its axial position is regulated.

2 () As mentioned above, the driven gear 4' that meshes with the intermediate gear 49
+If = 1 in the axial direction due to the configuration of Eye 2 and Eye 1
Since the gears 43 and 49 are supported by thrust and their axial positions are regulated, it is possible to prevent both gears 43 and 49 from having play in the axial direction. By arranging the gears \-4'4° 40, both gears 43, 49 can be reliably meshed across the tooth surfaces, thereby preventing the occurrence of noise and wear of the gears.

A pulse motor 52 as an actuator is supported and fixed to the motor support portion 45a of the bracket 45, and its output shaft 5 is supported via a bearing. In this way, the output shaft 5'3 of the pulse motor 52
By supporting the throttle body with the bracket 45, it is possible to omit the motor flange, which was conventionally required as a part of the pulse motor, and therefore, the manufacturing cost of the throttle body can be reduced by reducing the number of parts. In this case, the arrangement of the pulse motor 52 on the throttle body]
Step No. 1 is performed by sequentially sliding the components of the pulse motor 52 onto the bracket 45.

A drive gear 54 is connected to the output shaft 5'3 of the pulse motor 52.
is identified, and the four intermediate gears are meshed with the drive gear 54. Therefore, the output shaft 5'3 of the pulse motor 52
is connected to the throttle shaft 2 via a drive gear 54, an intermediate gear 40, a wave gear 43, and a control lever 9 engaged with the wave gear 43. That is, by operating the pulse motor 52 when the throttle shaft 2 is rotated by the accelerator position and the throttle valve 6 is opened to a certain opening degree, the throttle valve 0 is moved in the closing direction regardless of the accelerator position. Rotationally driven.

In this case, as described above, the wave gear 43 is always rotationally energized in the throttle valve listening direction by the third graying spring 44, so the wave gear 43 is of a type that maintains the holding torque H even when the pulse motor 44 is not energized. If a pulse motor is used, the backlash between the output shaft 53 of the pulse motor 52 and the driven gear 43 can be eliminated by energizing the pulse motor 52 in the h° direction opposite to the direction in which it operates. can. Furthermore, the wave gear 4'3 is rotated in the throttle valve opening direction by the third return spring 44 and disengaged from the control lever, so that when the pulse motor 52 is not operating, its inertia is applied to the throttle valve 6. Doesn't work. Therefore, the driver can operate the accelerator without being affected by the inertia of the pulse motor 52 and can obtain a good driving feeling in line with his/her intention.

When the throttle valve 6 is rotated in the closing direction by the operation of the pulse motor 52, the throttle valve 2 is
Since the engagement arm brackets 1-21 and 22 are rotated in the throttle valve closing direction 20 while resisting the spring force of the zero stroke motion spring 23, the throttle wire 16
will not be affected.

Further, as shown in FIG. 7, on the outer surface of the bracket 45, there are four parts 1 [
] 4 is provided, and adjustment screws] 05 of the four intermediate gears are screwed into the four parts 104, and a plug cap 106 is fitted into the fourth part 1.04 so as to cover the adjustment screws 105. be. This adjustment screw]05
is capable of adjusting forward and backward positions, and its tip comes into contact with the intermediate gear 49 at a predetermined circumferential position to regulate the return side stop position of the pulse motor 52 and adjust the number of pulses of the pulse motor 52. The adjustment is made so that the relationship between the rotation angle of the throttle lever 2 and the rotation angle of the throttle lever 2 is uniquely determined. With the above configuration, if the return side stop 1 position of the pulse motor 52 deviates, it can be easily adjusted by simply turning the adjustment screw 105 from the outside, and the plug cap 106 makes the inside waterproof and dustproof. Therefore, the pulse motor 52
11. It is possible to prevent adverse effects on accuracy, durability, etc.

Further, the bracket 45 is provided with a chamber 107 on the vertical side of the gear box 2. This chamber 1.07 has first to third drain holes 108a 1.
It communicates with the gear box 102, the inside of the pulse motor 52, and the atmosphere through 08b and 108c, respectively. With such a configuration, moisture in the air is absorbed into the gear box 1 due to temperature changes caused by the operation of the pulse motor 52, engine operation, etc.
Even if it condenses inside the chamber 1 () 7 or the pulse motor 52, it is removed through the drain holes 108a and 108b.
It can be further discharged into the atmosphere through the drain hole 1 (18c), so moisture and impurities ':9' contained therein can be properly prevented from adversely affecting the pulse motor 52 and gear machine ff4. In addition, direct intrusion of water from the outside into the pulse motor 52, etc. is prevented from occurring in the chamber 107.
11 is prevented by intervening (I).In history, the volume of this chamber 1 [] 7 should be set to a volume commensurate with the amount of respiration within the gear box 102 (for example, the space volume within the gear box 1 () 2). By setting it to approximately one-third of
When the inside of the gearbox gets cold and outside air is sucked in, water can be prevented from being sucked into the gearbox, and the above effects can be achieved with a minimum chamber volume.

The clay wall of the bracket 45 is further provided with a ventilation hole 109 that communicates with the gear box 102 and is released to the atmosphere through a filter (not shown) such as an air cleaner installed in the intake system of the vehicle engine. . The ventilation hole 109 ensures ventilation inside the gearbox 1 () 2, and water, fuel, debris, etc. pass through the ventilation hole 109 to the gearbox 102 and the pulse motor 5 leading thereto.
This can be prevented by a filter from entering the 11th part of 2.

Further, since the vent hole 109 functions as a vent hole during the water draining, this water draining action can be performed smoothly. In this case, by appropriately setting the angles of the water drain hole 108c and the ventilation hole 109, the water draining action can be performed more smoothly.

The throttle body 1 has a 10th gear supported on the throttle shaft 2! - A dashpot 56 is supported and fixed to slow down the rotational movement of the motion lever 7 in the throttle valve closing direction 20 near the fully opened position.

This dashpot 56 is conventionally well-known and consists of a housing 57 and a diaphragm 6 [-] whose periphery is held between the housing 57 and divides the interior of the housing 57 into a suction chamber 58 and an atmospheric pressure chamber 59. 60
One end of a connecting rod 61 that movably passes through the housing 57 and extends outward on the five atmospheric pressure chamber sides is connected to the central portion of the housing 57 via a retainer 80 . A suction pipe 81 communicating with the suction chamber 58 is connected to the housing 57, and this suction pipe 81 is exposed to the atmosphere via a jet 82 at its tip. Therefore, in order to bend the diaphragm 60 in the direction of increasing the volume of the suction chamber 68, the connecting rod +;
When attempting to drive the connecting rod 61, the plow of the jet 82 causes a force to act on the connecting rod 61 in the opposite direction to the driving direction.

-Jj, A support bolt 62 is threaded on the outer surface of the throttle body 1 and has an axis parallel to the throttle shaft 2.
A regulation lever 6' and a forced activation lever 64 are rotatably supported on this support bolt 62. In other words, between the head 62a of the support bolt 62 and the throttle body, there is a cylindrical collar 65 surrounding the support bolt 62, and an inner end of the collar 65, in order from the 17th section 62a side. The support bolt 62 is moved so that the disk-shaped regulation plate 66 is in contact with the end near the throttle body 1, and the outer end is in contact with the regulation plate 66, with the horn end far from the throttle body 1 being in contact with the regulation plate 66. A surrounding cylindrical collar 67 and a regulating plate 68 interposed between the inner end of the collar 67 and the throttle body 1 are fitted in order, and by tightening the support bolt 62, the above-mentioned collar 65, regulation plate 66,
A collar 67 and a regulating plate 68 are fixed to support bolts 62. The regulation lever 6'3 consists of a cylindrical part 63a coaxially surrounding the collar 65, and a tram part 63b fixed to the outer end of the cylindrical part 63a. It is rotatably supported by a collar 65 between the regulating plates 66. Forced activation lever 64
The j-ga portion 64a coaxially surrounds the collar 67, and the l'
l A drum section 64 fixed to the inner end of the fVj section 64a
The cylindrical portion 64a is rotatably supported by a collar 67 between regulating plates 66 and 68. At the inner and outer ends of the cylindrical portion 63a of the forced lever 6'3 and the cylindrical portion 64a of the forced activation lever 64, dust tolls 63c and 64c are respectively disposed on the sliding surfaces with the collars 65 and 67, and the dust holes 63c and 64c are disposed on the sliding surfaces of the collars 65 and 67, respectively. 1”14
The reliability of the operation of the object immersion prevention 11 and the regulation lever 63 and forced activation lever 64 is improved.

The regulation lever 63 includes an adjustment screw 6 whose tip can come into contact with a contact arm 70 provided on the tenth strike motion lever 7.
9 are screwed together so that the forward and backward positions can be adjusted, and the 1st adjustment 69 and the contact arm 70 are connected to the 10th strike motion lever.
7 and the throttle valve closing direction 20 so as to come into contact with each other. In addition, on the throttle body], the 10th throttle valve <-7 is attached to the abutting arm portion 70 when the throttle valve 6 is rotated to the fully closed position. They are screwed together so that the advancing and retracting positions can be adjusted through the adjustment screw 7 which is in contact with the two.

The other end of the connecting rod 61 of the dungeon pot 56 is connected to the regulating lever 63, and the connected state (1 is the tenth stroke motion lever 7 when the adjusting screw 60 is in contact with the contact arm 70). When the throttle valve is closed and rotated in the h direction 20, the diaphragm 60 to which the connecting rod 61 is connected is bent to increase the volume of the suction chamber 58.

The forced activation lever 64 is provided with a contact arm portion 72, and an adjustment screw 7゛3 whose tip can come into contact with this contact arm portion 72.
The forward and backward positions can be adjusted by screwing into the regulating levers 6 and 6. The reading portion 72 and the adjusting screw 73 are operated by the phase 11. It is designed to come into contact with. The spring 74 urges the tenth stroke motion lever 7 in the throttle valve opening direction 18 via the regulation lever 63 that is in contact with the forced activation lever 64 due to the contact between the contact arm portion 72 and the adjustment screw 73. When the operating lever 8 rotates from the fully closed position of the throttle valve 6 in the throttle valve opening direction 18, the regulation lever 63 and the forced activation lever 64 follow the operating lever 8 by the spring 74. The retainer 8 of the dashbot 56
0 or the inner surface of the housing 57 on the suction chamber 58 side, the 1J41 set screw 60 and 1j of the regulating lever 6'3
The contact state of the contact arm portion 70 is released.

In FIG. 5, an operating lever 8 and a forced activation lever 6 are shown.
4, when the operating lever 8 located at a position i1 corresponding to the fully closed position of the throttle valve 6 rotates in the throttle valve opening h degree direction 18, the forced activation lever 64 is forcibly rotated; The tenth motion lever 7 and the throttle lever 2 are moved in the throttle valve opening direction]8 via the regulation lever 63.
A forced activation mechanism 75 is provided for forcibly rotating.

The forced activation mechanism 75 has a cam 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 2 so as to move along the cam 76. It consists of a roller 77. Cam 76 and roller 7
7, the phase I1. The cam 76 rotates in response to the rotation of the operating lever 8 from the fully open position 31 in the throttle valve opening direction 18.
The forced activation lever 64 is rotated in the throttle valve opening direction 18 via the roller 77. -h
o, Throttle valve closing direction 2 of the forced activation lever 64
The rotation toward 0 is regulated by a stopper 64d fixed to the outer surface of the throttle body 1 within a range where the contact between the cam 76 and the roller 77 is maintained, and the forced activation lever is pressed against the throttle valve. Roller 77 rotates too much in the direction of closing LJi
This prevents the occurrence of the °j1 state in which the cam rides up on a part of the forced start lever 64 other than the cam 76, and by extension, the forced start lever 64
The aim is to improve the reliability of operation.

Next, the operation of this embodiment will be described. When the operating lever 8 is rotated in the throttle valve opening direction 18 by operating the accelerator with the pulse motor 52 inactive, the engagement arm 21a.

By the engagement of 21b, 22a, and 22b, 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 182 to the desired opening degree. It is forced to rotate.

At this time, the pulse motor 52 is returned to the return side stop position of 1° by the urging force of the third return spring 44, and the wave gear 43 and the control lever 9 are in a separated state.

The rotational movement of the control lever 8 in response to the accelerator operation is the cam machine h? The force is also transmitted to the 20th strike motion lever 28 via B, and the detection lever 29, that is, the detection shaft 27, rotates in the accelerator direction 32 by engagement of the engagement portion 36°'. 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.

By the way, at the initial stage of rotating the throttle valve 6 from its fully closed 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 machine +Fj A, the starting force of the throttle shaft 2 is insufficient, and the throttle shaft I
- The initial rotation of Rusuke 2 may not be smooth.

In such a case, the forced activation mechanism 75 forces the throttle shaft 2 to perform an initial rotational movement. 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 is driven, thereby rotationally driving the forced activation lever 64.
The rotation of the forced activation lever 64 is transmitted to the regulation lever 6' which is in contact with the contact arm 72 via the adjustment screw 73, and the contact arm 70 which is in contact with the adjustment screw 69 of the regulation lever 63. (-i) is transmitted to the 10th strike motion lever 7. Therefore, during the initial rotation operation of the control lever 7, the 10th strike motion lever 7 is forcibly rotated, and the throttle shaft 2, that is, the throttle valve 6 is fully opened. The initial rotation movement from the position becomes smooth.

Further, when the throttle valve 6 is rotated to the opening degree by the operating lever 8, the spring forces of the first and second return springs IQ and 24 act on the throttle shaft 2, that is, the throttle valve 6 toward the closing side.

Therefore, by relaxing the pulling force of the throttle wire 16, the operating lever 8 is rotated in the throttle valve closing direction 20, and the throttle shaft 2 and the throttle valve 6 are also rotated in the closing direction.

At this time, when the throttle valve 6 rotates to the vicinity of its fully closed position, the retainer 80 in the dashpot 56 moves into the suction chamber 5.
After the adjustment screw 69 of the regulation lever 64 comes into contact with the contact arm 70, the damping 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.

Also, when the jt operating lever 8 is rotated in the throttle valve closing direction 20, the lever 39 is detected by the accelerator operation amount detector 38.
Let us assume a case where the rotation does not occur smoothly due to a malfunction of either the detector 'Fill 27 or the accelerator operation amount detector '38, which are connected via the accelerator operation amount detector '38. In this case, the cam 31a or 3lb provided on the operating lever 8 is disengaged from the 35 engagement pin 28b or 28b 22 provided on the 20th stroke motion lever 28, and the operating lever 8 is moved to the accelerator. Rotating in the return direction 20 is a second skill, and the throttle valve 6 can be reliably rotated toward the closing side.

'', the pulse motor 52 is operated when the throttle valve 6 is opened to the opening degree by the accelerator operation and the throttle valve 6 is driven to the closing side for traction control. By this operation of the pulse motor 52, the throttle shaft 2 and the throttle valve 6 are moved to the tenth stroke motion so that the engaging portions 21a, 21b of the operation lever 8 and the engaging portions 22a, 22b of the tenth stroke motion lever 7 are separated. The throttle valve 6 can rotate against the spring force of the spring 23, and the throttle valve 6 can be rotated against the spring force of the spring 23.
can be driven in the closing direction.

Although the present invention has been described in detail above, it should be noted that the present invention is not limited to the above-mentioned embodiments, and that various modifications can be made within the scope of the invention described in the claims. Not even.

36 [Effects of the Invention] As explained above, in the present invention, the forced start lever rotates + on the axis parallel to the throttle axis fixed to the support.
Supported by iJ function, the forced activation lever and operation lever are
・■In order for the forced start lever to rotate in one direction in response to the initial rotation movement from the throttle wire λ/I corresponding position of the operating bar to the throttle valve opening position, a roller provided on the operating lever and a forced start lever are used. The forced starting lever and the lost motion lever are connected via a cam mechanism consisting of a cam surface provided on the starting lever, and the lost motion lever fully closes the throttle valve in response to rotation of the forced starting lever in one direction. Since the throttle valve is connected to initially rotate in the opening direction from the fully closed position, when the operating lever rotates to rotate the throttle valve from its fully closed position, the roller or cam surface contacts the cam surface and rolls. The forced activation lever rotates, and in response to the rotation, the lost motion lever is forcibly rotated, and the initial rotation of the throttle shaft and, in turn, the throttle valve from the fully closed position (one move inwards). A dust seal is provided on the sliding surface between the shaft parallel to the throttle shaft identified in the body and the forced activation lever, which prevents foreign matter from entering the sliding portion, thereby ensuring reliable operation of the cam mechanism. Therefore, according to the present invention, in response to the initial rotational movement of the operating lever from the throttle valve fully closed position to the throttle valve opening direction, the lost motion lever is forcibly changed from the throttle valve fully closed position to the throttle valve opening direction. A throttle control device is provided which is equipped with a mechanism for initial rotation in the valve opening direction and whose operation is as reliable as possible.

[Brief explanation of drawings]

FIG. 1 is a front view of a throttle control device according to an embodiment of the present invention, FIG. 2 is a view taken along the ■ arrow in FIG. 1, FIG. 3 is a view taken along the line ■-■ in FIG. 2, and FIG. is a view in the direction of the ■ arrow in Fig. 2, Fig. 5 is a view in the direction of the v-■ arrow in Fig. 3, Fig. 6 is a partial perspective view of the receiver member 25b, and Fig. 7 shows the adjusting screw of the intermediate gear. FIG. 1... Throttle body, 2... Throttle shaft, 7
... 10th motion lever, 8... Operation lever 9... Control lever, 10... Collar, 14... Bearing, 21a, 21b - Engagement arm portion, 22a. 22b...Engagement arm portion, 25a, 25b...Receiver is member, 25a'25b'...Notch, 28...20th stroke lever, 28b, 28b22...
・Engagement pin, 1 31a, 31b...Cam, 63...Restriction lever 64
... Forced activation lever, 63c, 64c... Dust seal, 64d... Stopper, 76... Cam surface, 7
7...Roller, A...Lost motion mechanism, B...
...Cam mechanism.

Claims (1)

[Claims] An operating lever interlocked with accelerator operation is supported so as to be relatively rotatable on a throttle shaft having a butterfly-type throttle valve and rotatably supported on a support body and biased by a spring in the closing direction of the throttle valve. and a control lever that is interlocked and connected to the actuator, and a lost motion lever that is fixed to the throttle shaft so as to be engaged with the operating lever in response to rotation of the operating lever in the throttle valve closing direction. In a throttle control device in which a lost motion spring is interposed between the operating lever and the lost motion lever, the forced activation lever is attached to a shaft parallel to the throttle shaft fixed to the support. is rotatably supported, and the forced start lever and the operation lever are arranged such that the forced start lever rotates in one direction in response to the initial rotation movement of the operation lever from the throttle valve fully closed position to the throttle valve opening direction. The forced start lever and the lost motion lever are connected via a cam mechanism consisting of a roller provided on the operation lever and a cam surface provided on the forced start lever, and the forced start lever and the lost motion lever are connected when the forced start lever moves from the throttle valve fully closed position to the throttle valve fully closed position. A throttle control device characterized in that a dust seal is provided on a sliding surface between a forced start lever and a shaft parallel to a throttle shaft that is connected to a support for initial rotation in a valve opening direction and that is fixed to a support. .