JP2002317660A - Throttle valve control apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smoothly rotate an accelerator pedal and a cruise control apparatus by reducing outer diameter sizes of two operating drums interlocking therewith. SOLUTION: A drum part 36 of a throttle drum 22 and a disc part 52 of a cruise control drum 24 are rotatably mounted to a throttle shaft 18. A drum part 50 of the cruise control drum 24 is arranged with a space at the outside of an outer circumferential face of the drum part 36 of the throttle drum 22. Both end parts of a first return spring 66 disposed on the outer circumferential face of the drum part 36 of the throttle drum 22 are locked to inner faces 54, 74 of the throttle drum 22 and cruise control drum 24. One end of a second return spring 80 disposed to the drum part 50 of the cruise control drum 24 is locked to the inner face 54 of the throttle drum 22, and the other end of the second return spring is locked to a supporting rod 70.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a throttle system in which a throttle drum rotatable by an accelerator pedal and a cruise control drum for constant-speed running are individually brought into contact with a throttle lever fixed to a throttle shaft. The present invention relates to a throttle valve control device that opens and closes a throttle valve by rotating a shaft.

[0002]

2. Description of the Related Art There is known a cruise control device capable of maintaining a constant speed when a desired vehicle speed is reached without operating the accelerator pedal by operating a switch.

The applicant of the present invention has invented a throttle valve control device for a vehicle that also uses a cruise control device, which has a reduced throttle shaft length and includes a throttle drum and a cruise control drum connected to an accelerator pedal and a cruise control device. It has been proposed as a "throttle valve control device" (see Japanese Patent Application Laid-Open No. 8-284694).

[0004]

SUMMARY OF THE INVENTION The present invention has been made in connection with the above-described throttle valve control device. The present invention aims at reducing the size of the throttle drum and cruise control drum and improving the feeling when operating the accelerator pedal. An object of the present invention is to provide a throttle valve control device capable of improving durability and reliability without impairment.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides an operation drum rotatable by an accelerator pedal and an operation drum for constant speed traveling, which are parallel to a throttle shaft or the throttle shaft. A throttle valve control device that opens and closes a throttle valve by rotating a throttle shaft by engaging a throttle lever fixed to a drum shaft, wherein both operation drums are parallel to the throttle shaft or the throttle shaft. A first return spring and a second return spring, which return the operation drums to a predetermined posture, are arranged in an inner and outer double manner, while being rotatably arranged with a simple drum shaft as a common axis. One end of one of the first and second return springs has both ends thereof respectively in the closing direction of the one operation drum and the other operation drum. The other end of the first or second return spring is urged in the closing direction and the other end of the first or second return spring is engaged with the support member. The resilience of the other first or second return spring is set to be larger than the resilience of the one first or second return spring.

Further, according to the present invention, an operation drum rotatable by an accelerator pedal and an operation drum for constant speed traveling are engaged with a throttle lever fixed to a throttle shaft to rotate the throttle shaft. A throttle valve control device that opens and closes a throttle valve, wherein the one operation drum is rotatably disposed on the throttle shaft, and the one operation drum is attached to a predetermined outer circumference of the one operation drum. A first return spring for returning to the posture is disposed, and the other operation drum is disposed on an outer periphery of the first return spring at a predetermined radial distance from the one operation drum. And a second return spring for returning the other operation drum to a predetermined posture is provided on an outer periphery of the other operation drum, and the first or second return drum is provided. One end of one of the two end springs is locked to the one operation drum or the other operation drum, and the other end is locked to a support member. The other end portions of the first and second operation drums are locked by the one operation drum and the other operation drum.

According to the throttle valve control device of the present invention, the notch for leading the end of the first or second return spring outward can be eliminated. For this reason,
The structure is simplified, and the operation of the throttle valve can be performed smoothly.

Further, one of the first and second return springs urges one end in the opening direction of the throttle valve and urges the other end in the closing direction of the throttle valve to thereby provide the first return spring. Alternatively, since the total resilience of the second return spring can be adjusted, the rotational load of one or the other operation drum can be adjusted, and the opening and closing operation of the throttle valve can be performed smoothly. Can be. As a result, the pedal feeling for operating the throttle valve control device can be improved.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A throttle valve control device according to the present invention will be described in detail below with reference to preferred embodiments and the accompanying drawings.

FIGS. 1 to 3 show the configuration of a throttle valve control device 10 according to a first embodiment of the present invention. The throttle valve control device 10 can be used not only for fuel injection but also for a carburetor and the like, but in the present embodiment, a case where it is used for fuel injection will be described as an example.

The main body 1 of the throttle valve control device 10
2 has a passage 14 therein. A throttle valve 16 for opening and closing the passage 14 is rotatably disposed on the apparatus main body 12. That is, the throttle valve 16 is fixed to the throttle shaft 18, and one end of the throttle shaft 18 extends to the shaft portion 26.

The other end of the throttle shaft 18 is rotatably supported by a boss 13 of the apparatus main body 12 via a bearing 28, and notches 30a and 30b are provided at the tip end thereof to form a substantially oblong section. It is formed into a shape. Throttle shaft 1
8, the throttle lever 20 is integrally mounted via the notches 30a and 30b. Throttle lever 20
As shown in FIG. 2, as shown in FIG. 2, a substantially elliptical hole 32 corresponding to the cutouts 30 a and 30 b of the throttle shaft 18 is formed at the center thereof, and at one end thereof. An engagement portion 34 is provided extending in the axial direction of the throttle shaft 18 (the direction of the arrow X).

The throttle shaft 18 has a drum portion 36 of a throttle drum (operation drum) 22 and a disk portion 5 of a cruise control drum (operation drum) 24 described later.
2 is rotatably mounted. The throttle drum 22
Is a drum portion 36 extending in the axial direction of the throttle shaft 18.
And a disc portion 38 integrally formed at the end of the drum portion 36 so as to extend in the diameter direction. In this case, the drum portion 36 and the disk portion 38 may be formed separately and integrally fixed.

A protrusion 44 is formed on the outer periphery of the disc portion 38 so as to be able to abut on the engaging portion 34 of the throttle lever 20, and a first wire having one end fixed to the disc portion 38 is provided. Reference numeral 46 is connected to an accelerator pedal (not shown) via a guide portion 48 having a U-shaped cross section formed integrally with the disk portion 38.

The cruise control drum 24 is
The disk portion 52 extends in the diametrical direction, and the drum portion 50 integrally formed with the disk portion 52 is disposed outside (in the radial direction) of the drum portion 36 of the throttle drum 22 at intervals. Have. The disc portion 52 of the cruise control drum 24 has one side surface joined to the end surface of the drum portion 36 of the throttle drum 22, and the side surface is connected to the throttle shaft 18 by a nut 42 via a stopper plate 40.
Be tightened. The stopper plate 40 is formed with a hole 41 (see FIG. 2) having a substantially elliptical cross section corresponding to the shape of the tip of the throttle shaft 18.

The disc portion 52 has a throttle lever 2
The second wire 62 having a U-shaped cross-section formed on the disc portion 52 is formed with a protruding portion 60 which can be freely contacted with the engagement portion 34. It is connected to a cruise control device (not shown) via a guide portion 64 having a groove.

Both ends of a first return spring 66 disposed on the outer peripheral surface of the drum portion 36 of the throttle drum 22 are engaged with the inner surfaces 54 and 72 of the throttle drum 22 and the cruise control drum 24, respectively. In this case, the first return spring 66
One end, for example, the end on the throttle drum 22 side is locked so as to urge the throttle drum 22 in the opening direction of the throttle valve 16, and the other end, for example, the end on the cruise control drum 24 side is Cruise control drum 2
4 is locked so as to urge the throttle valve 4 in the closing direction of the throttle valve 16.

The second return spring 80 provided on the drum portion 50 of the cruise control drum 24
One end is locked to the inner side surface 54 of the throttle drum 22, and the other end is locked to the support rod 70. For this reason,
The second return spring 80 is connected to the throttle drum 2
2 is constantly biased in the direction of arrow B (see FIG. 2), and is held in a predetermined posture such that the protrusion 44 of the throttle drum 22 comes into contact with the support rod 70.

The resilience of the first and second return springs 66 and 80 is equal to that of the second return spring 8.
Since the resilience of the first return spring 66 is set to be larger than the resilience of the first return spring 66, the throttle drum 22 moves the throttle valve under the action of the tensile force of the first return spring 66. 16 does not rotate in the opening direction.

As shown in FIG. 1, a throttle valve 1 is provided between the throttle lever 20 and the boss 13 of the apparatus main body 12.
A throttle return spring 76 for returning the valve 6 to the closed position of the passage 14 is provided. The throttle return spring 76 has one end locked to the boss 13 of the apparatus body 12 and the other end locked to the throttle lever 20. Therefore, the throttle valve 16 always closes the passage 14 by the elastic force of the throttle return spring 76.

The throttle valve control device 10 according to the first embodiment of the present invention is basically configured as described above. Next, the operation and effect thereof will be described.

First, when the accelerator pedal and the cruise control device (not shown) are not operated, the throttle valve 16 is located at the return position via the elastic force of the throttle return spring 76, that is, at the position where the passage 14 is closed. (See FIG. 1).

When the accelerator pedal (not shown) is depressed, the first wire 46 locked on the throttle drum 22 is pulled, and as shown in FIG. It turns in the direction of arrow A against the resilience obtained by subtracting the resilience of the first return spring 66 from the resilience of the return spring 80. For this reason, the projection 44 of the throttle drum 22 presses the engagement portion 34 of the throttle lever 20 in the direction of arrow A,
The throttle lever 20 rotates integrally with the throttle shaft 18 in the direction of arrow A. By the rotation of the throttle shaft 18, the throttle valve 16 is rotated by a predetermined angle, and the passage 14 is opened.

At this time, the cruise control drum 24
Is held at a position where the protrusion 60 abuts on the support rod 70 due to the resilience of the first return spring 66, that is, at a predetermined position, so that the rotation of the throttle drum 22 can be prevented. . When the operation of the accelerator pedal is released, the arrow B moves in the direction of arrow B under the tensile force of the difference between the elastic force of the second return spring 80 and the elastic force of the first return spring 66. The protrusion 44 is rotated to return the protrusion 44 to a predetermined return position in contact with the support rod 70.

In this state, when the second wire 62 is pulled through a cruise control device (not shown), the cruise control drum 24 to which the second wire 62 is fixed is moved by the elasticity of the first return spring 66. It turns in the direction of arrow A against the force. For this reason, the projection 60 of the cruise control drum 24 is
The throttle lever 20 is rotated in the direction of arrow A by abutting on the engagement portion 34 of the No. 0, and the throttle shaft 18 to which the throttle lever 20 is fixed is held at a predetermined angular position. Thus, the vehicle travels at a constant speed. When the cruise control drum 24 rotates, the throttle drum 22 pulls the elastic force of the second return spring 80 minus the elastic force of the first return spring 66 under the tensile action of the elastic force. Entrainment is prevented.

According to the throttle valve control device 10 according to the first embodiment of the present invention, the first and second return springs 66, 80 are respectively provided with the throttle drum 22, the drum portion 36 of the cruise control drum 24, 50 are provided on the outer peripheral portion. In particular, since both ends of the first return spring 66 are locked to the inner surfaces 54 and 72 of the throttle drum 22 and the cruise control drum 24, both ends of the first return spring 66 are One does not need to be led out from the outer peripheral surface of the throttle drum 22 or the cruise control drum 24 and locked to the support rod 70. Thereby, the throttle drum 22 and the cruise control drum 24 can rotate smoothly, and the pedal feeling for operating the throttle valve control device 10 can be improved.

Further, one end of both ends of the first return spring 66 is urged in the opening direction of the throttle valve 16,
By urging the other end in the closing direction of the throttle valve 16, the total resilience of the first and second return springs 66 and 80 urged by the throttle drum 22 or the cruise control drum 24 is subtracted. Therefore, the load characteristics of the throttle drum 22 and the cruise control drum 24 can be adjusted, and the opening and closing operation of the throttle valve 16 can be performed smoothly.

In the throttle valve control device 10 according to the first embodiment of the present invention, the drum portion 36 of the throttle drum 22 and the drum portion 5 of the cruise control drum 24
0, a space is provided so that the first return spring 66 is disposed. The drum portions 36 and 50 are directly fitted, and the outer periphery thereof, for example, the outer peripheral portion of the cruise control drum 24 is provided. In addition, for example, the first and second return springs 66 and 80 may be arranged as in a second embodiment (see FIG. 5) described in detail below. Also in this case, when the both ends of the inner return spring, for example, the first return spring 66 are locked to the throttle drum 22 and the cruise control drum 24, interference with the cruise control drum 24 is avoided. Most preferred.

FIG. 4 shows a modification of the throttle valve control device 10 according to the first embodiment of the present invention.

The throttle valve control device 10a of this modification is different from the throttle valve control device 10 shown in FIG. 1 in that the shapes of the drum portion 36 of the throttle drum 22 and the drum portion 50 of the cruise control drum 24 are different. Has changed. That is, the drum unit 5 of the cruise control drum 24
0 is rotatably mounted on the throttle shaft 18. The drum unit 50 of the cruise control drum 24
The drum portion 36 of the throttle drum 22 is arranged outside the outer peripheral surface of the throttle drum 22 at intervals.
A bearing member 82 is fitted on the inner peripheral surface of the drum portion 36. In this case, the side wall portion 84 of the bearing member 82 is attached to the notches 30a and 30b of the throttle shaft 18.

The first return spring 66 disposed on the outer peripheral surface of the drum portion 50 of the cruise control drum 24 has one end locked to the inner side surface 72 of the cruise control drum 24 and the other end fixed to the bearing member 82. Of the throttle drum 22 and a notch 88 formed in the disc portion 38 of the throttle drum 22 and locked to the support rod 70.

The second return spring 80 disposed on the outer peripheral surface of the drum portion 36 of the throttle drum 22 has its both ends locked to the inner surfaces 54 and 72 of the throttle drum 22 and the cruise control drum 24, respectively. ing. Therefore, since the throttle drum 22 is rotatably supported by the bearing member 82 as a guide, there is an advantage that the rotation operation of the throttle drum 22 is performed more smoothly and reliably.

The throttle valve control device 10a of this modified example
Then, as shown in FIG. 1, the first return spring 6
When the both ends of the cruise control drum 6 are engaged with the throttle drum 22 and the cruise control drum 24, it is unnecessary to form the cutouts 30a and 30b in the cruise control drum 24, which is the most preferable.

FIGS. 5 to 7 show a throttle valve control device 90 according to a second embodiment of the present invention. In the throttle valve control device 90 according to the second embodiment, the throttle valve 16
And a shaft for rotating the throttle lever 92, the throttle drum 22, and the cruise control drum 24 are separately provided, and these shafts are connected by a link mechanism. That is, the throttle drum 2
2. The cruise control drum 24 and the throttle lever 92 are connected to the drum shaft 94 by the configuration shown in FIG.
Attached to. The link 96 has a throttle shaft 1 at one end.
The nut 1 is attached to the shaft end of
04, and a roller 98 is pivotally supported at the other end. The link 96 has a hole 102 having a substantially elliptical cross section corresponding to the shape of the link 96 formed at the shaft end of the throttle shaft 18.

In this case, the drum shaft 94 is rotatably supported by the apparatus main body 12 substantially in parallel with the throttle shaft 18 to which the throttle valve 16 is fixed. A guide hole 106 (see FIG. 6) in which the roller 98 is displaced following the roller 98 is formed in the throttle lever 92. In the guide hole 106, a scanning surface 108 formed by a combination of a straight portion and a curved portion that sets an operation process of the throttle valve 16 opening the passage 14 is formed, and the roller 98 is displaced along the scanning surface 108. Therefore, the throttle lever 92 rotates the throttle shaft 18 via the roller 98 and the link 96 which are displaced along the copying surface 108 of the guide hole 106. The rotation of the throttle shaft 18 causes the throttle valve 1 to rotate.
6 opens the passage 14. From this, it is possible to appropriately adjust the operating characteristics of the throttle valve 16 to open the passage 14 by the shape of the guide hole 106.

Between the main body 12 and the throttle lever 92, first and second throttle return springs 110 and 112 for returning the throttle valve 16 to the closed position of the passage 14 are interposed. That is, the first and second throttle return springs 110, 11
2 is locked to the bosses 13 and 17 of the apparatus main body 12, and the other end is connected to the link 96 and the throttle lever 9.
Locked to 2.

With the above configuration, the throttle lever 92 rotates, and the rotation of the throttle lever 92 causes the throttle shaft 18 via the roller 98 and the link 96 to rotate.
Is rotated, the throttle valve 16 opens the passage 14. The opening degree characteristic of the throttle valve 16 when the throttle valve 16 opens the passage 14 is as follows:
It can be set by the shape of the guide hole 106 of the throttle lever 92, and the pedal feeling at the time of operating the accelerator pedal can be improved.

Further, the throttle shaft 18 and the drum shaft 94
Are separately provided, so that the assembling easiness of the throttle valve control device 90 can be ensured, and the efficiency of the adjustment operation can be improved.

The throttle valve control device 10 according to the first embodiment of the present invention and the throttle valve control device 1 according to the modified example are described above.
0a and throttle valve control device 90 according to second embodiment
In the above, the positions of the respective disc portions 38 and 52 of the throttle drum 22 and the cruise control drum 24 may be arranged in opposite directions with respect to the axial direction. Further, the inner and outer operation drums may be replaced with throttle drums or cruise control drums.

[0040]

According to the present invention, the notch for leading the end of the first or second return spring outward is not required. For this reason, the structure is simplified, and the operation of the throttle valve can be performed smoothly. Further, one of the first and second return springs urges one end in the opening direction of the throttle valve, and urges the other end in the closing direction of the throttle valve, thereby providing the first or second return spring. Can adjust the total resilience of the return spring, so that the rotational load of one or the other operation drum can be adjusted, and the opening / closing operation of the throttle valve can be performed smoothly. As a result, the pedal feeling for operating the throttle valve control device can be improved.

As a result, the operation of the throttle valve becomes smooth, and the reliability and durability of the throttle valve control device can be improved.

A throttle shaft for fixing the throttle valve;
A throttle lever and a drum shaft that supports the operation drum may be separately provided, and these shafts may be connected by a connecting member. With such a configuration, the throttle shaft is interlocked with the rotation of the throttle lever to open the throttle valve. In this case, the shape of the guide hole formed in the throttle lever can be changed according to the opening degree characteristics such as the opening / closing timing and opening timing of the throttle valve. Thereby, the timing of operating the operation drum can be adjusted, and the pedal feeling of operating the accelerator pedal can be improved.

[Brief description of the drawings]

FIG. 1 is an explanatory longitudinal sectional view of a main part of a throttle valve control device according to a first embodiment of the present invention.

FIG. 2 is an exploded perspective view of a main part showing a positional relationship among a throttle drum, a cruise control drum, a throttle lever, and a support rod of the throttle valve control device of FIG. 1;

FIG. 3 is a side view of the throttle valve control device of FIG. 1;

FIG. 4 is an explanatory longitudinal sectional view of a main part of a throttle valve control device according to a modification.

FIG. 5 is an explanatory longitudinal sectional view of a main part of a throttle valve control device according to a second embodiment of the present invention.

FIG. 6 is an exploded perspective view of a main part showing a positional relationship among a throttle drum, a cruise control drum, a throttle lever, and a support rod of the throttle valve control device of FIG. 5;

FIG. 7 is a side view of a main part of the throttle valve control device of FIG. 6;

[Explanation of symbols]

10, 10a, 90 ... throttle valve control device 12 ... device body 14 ... passage 16 ... throttle valve 18 ... throttle shaft 20, 92 ... throttle lever 22 ... throttle drum 24 ... cruise control drum 36, 50 ... drum portion 38, 52 ... Disc portions 46, 62 ... wires 54, 72 ... inner surfaces 66, 80 ... return springs 70 ... support rods

 ──────────────────────────────────────────────────続 き Continued on front page F term (reference) 3D044 AA01 AA21 AA28 AA49 AA50 AB01 AC03 AD04 AD12 3G065 CA20 CA21 GA11 KA13 KA14 3G093 AA01 BA04 BA23 BA28 EA09

Claims (2)

[Claims] An operating drum rotatable by an accelerator pedal and an operating drum for constant-speed running are engaged with a throttle shaft or a throttle lever fixed to a drum shaft parallel to the throttle shaft to thereby control the throttle shaft. A throttle valve control device that opens and closes a throttle valve by rotating a throttle valve, wherein the two operation drums are rotatable inside and outside duplex with the throttle shaft or a drum shaft parallel to the throttle shaft as a common axis. And a first return spring and a second return spring, which return the operation drums to a predetermined posture, are arranged inside and outside, and one of the first and second return springs is Both ends of the first or second operation drum are locked by urging the one operation drum in the closing direction and the other operation drum in the opening direction. Other over down spring, the other end one end biasing the other operation the drum in the closing direction is engaged with the support member, the first of the other or second
Wherein the resilience of the return spring is set to be greater than the resilience of the first or second return spring. 2. A throttle valve is rotated by engaging an operation drum rotatable by an accelerator pedal and an operation drum for constant speed traveling with a throttle lever fixed to a throttle shaft to rotate the throttle shaft. A throttle valve control device that opens and closes, wherein the one operation drum is rotatably disposed on the throttle shaft, and the one operation drum is returned to a predetermined posture on an outer periphery of the one operation drum. A first return spring is disposed, and the other operation drum is disposed on an outer periphery of the first return spring at a predetermined interval in a radial direction with respect to the one operation drum; A second return spring for returning the other operation drum to a predetermined posture is provided on an outer periphery of the other operation drum, and a second return spring of the first or second return spring is provided. Of the two ends, one end is locked to the one operation drum or the other operation drum, the other end is locked to the support member, and the other end of the first or second return spring is locked. A throttle valve control device wherein both end portions are locked to the one operation drum and the other operation drum.