JP2005041259A - Throttle opening detector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a throttle opening detector which can increase safety by shutting off the propulsive force of a vehicle regardless of the output by a detecting means such as a potentiometer when a throttle grip is returned to the initial position. <P>SOLUTION: This throttle opening detector is equipped with a roller 2 which can rotate while interlocking with the throttle grip being attached to the distal end of a steering wheel bar HB of a vehicle, a rotating body 3 and angle sensors 5a and 5b which detect the rotating angle of the roller 2, and a case 11 which is fixed to the proximal end side of the throttle grip in the steering wheel bar HB while housing the rotating body 3 and the angle sensors 5a and 5b. Then, the throttle opening detector detects a throttle opening degree based on the rotating angle of the roller 2 which is detected by the angle sensors 5a and 5b. The throttle opening detector is equipped with an initial position detecting means comprising a magnet 9 and a hole element 10, which detects the initial position of the throttle grip, and the propulsive force of the vehicle can be intercepted based on the detection by the initial position detecting means. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a throttle opening detection device for detecting a throttle opening by detecting a rotation angle of a throttle grip in a vehicle having a handlebar such as a motorcycle.
[0002]
[Prior art]
Generally, in a vehicle having a handlebar such as a motorcycle, a throttle grip is disposed at the end of the handlebar, and when the driver rotates the throttle grip, the throttle opening is detected based on the rotation angle, A throttle opening detection device for running the vehicle at an arbitrary speed is provided. As such a throttle opening degree detecting device, various configurations have been conventionally proposed. For example, the one disclosed in Patent Document 1 can be cited.
[0003]
The throttle opening detection device disclosed herein includes a drive pulley portion that rotates in conjunction with a throttle grip, a detection gear that meshes with a gear formed in a part of the drive pulley portion, and the rotation of the detection gear. It mainly consists of a throttle opening sensor composed of a potentiometer to detect the angle. When the throttle grip is rotated, the potentiometer is rotated via the drive pulley portion, and the throttle opening is detected.
[0004]
[Patent Document 1]
JP-A-4-254278
[Problems to be solved by the invention]
However, in the conventional throttle opening detection device, when the potentiometer breaks down or a meshing failure between the teeth formed on the drive pulley and the detection gear occurs, the throttle grip is moved to the initial position (i.e., the throttle grip). Even when the opening degree is minimum, there is a possibility that a signal for returning the throttle opening degree is not transmitted to the electronic control device side such as an ECU. In such a case, even if the throttle grip is returned to the initial position, the drive of the engine is transmitted to the drive wheels, which is problematic from the viewpoint of safety.
[0006]
The present invention has been made in view of such circumstances, and if the throttle grip is returned to the initial position, the propulsive force of the vehicle can be cut off regardless of the output of the detection means such as a potentiometer and the safety can be improved. An object of the present invention is to provide a throttle opening detection device capable of performing the above.
[0007]
[Means for Solving the Problems]
According to a first aspect of the present invention, there is provided an interlocking member that can be rotated in conjunction with a throttle grip attached to a front end of a handlebar of a vehicle, a detecting means for detecting a rotation angle of the interlocking member, and a housing for the detecting means. A throttle opening detecting device for detecting the throttle opening based on the rotation angle of the interlocking member detected by the detection means, and a case fixed to the throttle grip proximal end side of the handlebar. An initial position detecting means for detecting the initial position is provided, and the propulsive force of the vehicle can be cut off based on the detection by the initial position detecting means.
[0008]
According to a second aspect of the present invention, in the throttle opening degree detecting device according to the first aspect, the initial position detecting means includes a magnet disposed on the throttle grip side and a hall element disposed on the case side. When the throttle grip is in the initial position, the magnet and the hall element are opposed to each other and close to each other.
[0009]
According to a third aspect of the present invention, in the throttle opening degree detecting device according to the second aspect, the detection means rotates in conjunction with the interlocking member and is composed of a rotating body made of a magnet having different poles on the surface, An angle sensor including a magnetoresistive element for detecting the rotation angle of the rotating body, and the Hall element is disposed on a substrate on which the angle sensor is mounted.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
The throttle opening detection device according to the present embodiment is for detecting the rotation angle of a throttle grip attached to the handlebar of a two-wheeled vehicle and sending the detection signal to an electronic control device such as an ECU mounted on the two-wheeled vehicle. As shown in FIGS. 1 to 4, a roller 11 as an interlocking member, a spring 7 and an angle sensor 5a as a detecting means are fixed to a case 11 fixed to the base end side of a throttle grip (throttle pipe G) in the handle bar HB. 5b, the rotating body 3, and the Hall element 10 are disposed.
[0011]
The side of the case 11 opposite to the throttle pipe G at the portion where the roller 2 is disposed is open. After the components such as the roller 2 to be accommodated in the case 11 are assembled, the opening is covered with the cover 8. It is configured. Specifically, the cover 8 has substantially the same shape as the shape in the vicinity of the opening of the case 11 to close the opening, and as shown in FIGS. 1 and 3, the engagement convex portion 11 a formed on the case 11. An engagement hole 8a that can be locked is formed.
[0012]
In this way, by covering the opening of the case 11 with the cover 8 while engaging the engagement hole 8 with the engagement convex portion 11a, it is possible to avoid a foreign matter from entering the spring 7 or the like and causing a problem. . Note that the locking of the cover 8 to the case 11 may be performed in other forms.
[0013]
The throttle pipe G is configured such that a resin throttle grip (not shown) is inserted through an outer surface thereof to constitute a part of the throttle grip. A magnet 9 is disposed at a part of the base end side of the throttle pipe G, and the magnet 9 and the Hall element 10 constitute an initial position detecting means. The throttle pipe G is rotatable with respect to the handle bar HB, and is configured to increase the output of the engine if the driver rotates from the initial position.
[0014]
The roller 2 has an engagement protrusion 2a protruding to the throttle pipe G side. When the engagement protrusion 2a engages with the base end side of the throttle pipe G, the rotation operation of the throttle pipe G is performed. It is configured to be able to rotate in the case 11 in conjunction with each other.
[0015]
As shown in FIG. 3, a rotating body 3 having a convex portion 3 a that forms the center of rotation is disposed at a position adjacent to the roller 2. Specifically, a plurality of teeth are formed on the outer peripheral surfaces of the roller 2 and the rotating body 3, respectively, and these two teeth mesh with each other so that the rotating body 3 is rotated with the rotation of the roller 2. It is comprised so that it can rotate centering on the convex part 3a.
[0016]
That is, when the throttle pipe G is rotated, the roller 2 rotates in conjunction with the rotation of the throttle pipe G, and the rotational force is transmitted to the rotating body 3 so that the rotating body 3 rotates around the convex portion 3a. The throttle pipe G rotates at a rotation angle corresponding to the rotation of the throttle pipe G. Here, as shown in FIG. 5, the S pole and the N pole are formed on the surface of the rotating body 3, and the magnetic field lines m of the angle sensors 5 a and 5 b formed on the front and back surfaces of the substrate 4 to be described later. It is configured to influence each.
[0017]
As shown in FIG. 3, the angle sensors 5a and 5b are respectively arranged on the front and back surfaces of the substrate 4 on which the wiring H is extended while forming a predetermined circuit, and are composed of magnetoresistive elements. Therefore, since the angle of the magnetic force line m changes as the rotating body 3 rotates, the rotation angle of the throttle pipe G (that is, the throttle grip) is detected if the increase or decrease in the resistance value of each angle sensor 5a, 5b is detected. can do.
[0018]
The substrate 4 is provided with an amplifier 6 (which is provided on each of the front and back sides of the substrate) and a hall element 10 for amplifying output signals of the angle sensors 5a and 5b. In addition, a portion where the substrate 4 is disposed (a concave portion of the case 11) is filled with a predetermined resin in a state where it is assembled as shown in FIG.
[0019]
The hall element 10 can detect that the magnet 9 disposed on the throttle pipe G side is in a facing position (the throttle pipe G is in the initial position as described above). Then, after the electrical signals from the angle sensors 5a and 5b are amplified by the amplifier 6, the amplified signals can be sent to an external device such as an ECU via the wiring H, and at the same time, formed on the throttle pipe G side. It is also configured to detect that the magnet 9 is close to the Hall element 10 and to send an output signal to an external device such as an ECU via the wiring H.
[0020]
Further, the throttle opening degree detecting device having the above-described configuration may be disposed in a switch case fixed to the front end of the handlebar of the motorcycle (the base end side of the throttle grip). In that case, since the switch case of the two-wheeled vehicle has a waterproof function, the waterproof effect in the throttle opening detecting device can also be improved. Of course, it may be fixed to the front end side of the handlebar as a separate body from the switch case.
[0021]
Next, the operation of the throttle opening detection device having the above-described configuration will be described.
When the driver rotates the throttle grip (throttle pipe G) attached to the tip of the handlebar HB of the motorcycle, the roller 2 fitted to a part of the throttle pipe G rotates in conjunction with the rotation, and the rotating body 3 also rotates by an angle corresponding to the rotation angle of the roller 2 around the convex portion 3a. At this time, since the magnet 9 moves away from the Hall element 10, the detection signal from the Hall element 10 is not output.
[0022]
On the other hand, as shown in FIG. 5, the N pole and the S pole are formed on the surface of the rotating body 3, and the magnetic lines of force m are generated from the N pole toward the S poles. Since the electrical resistance is generated by affecting each of the angle sensors 5a and 5b formed on the front and back surfaces of the No. 4, the detection signal of the double signal system can be obtained. That is, in FIG. 5, when the angle sensor 5 b is viewed from Q with respect to the substrate 4 and when the angle sensor 5 a is viewed from P with respect to the substrate 4, the direction in which the magnetic lines of force m pass is reversed. The rotation is also reversed (clockwise and counterclockwise).
[0023]
These simultaneously generated detection signals are transmitted to the vehicle electronic control device via the amplifier 6, and both detection signals are synthesized by the electronic control device to obtain a predetermined waveform. Thus, since the throttle opening is controlled based on the detection signal of the double signal system obtained by the two angle sensors 5a and 5b, when one of the angle sensors 5a or 5b or the wiring is broken, Since the output voltage from the angle sensor goes down and the sum (synthesis value) of the output voltages is different, it can be recognized that there is a problem with the one angle sensor or wiring. Even in this case, various controls are performed based only on the output from the other angle sensor, and safety can be ensured.
[0024]
As described above, since the rotation angle of the rotating body 3 is detected by the angle sensors 5a and 5b in a non-contact manner, there is no contact portion between them such as a potentiometer, and wear does not occur. Therefore, the durability of the throttle opening detection device can be improved. Furthermore, since the angle sensors 5a and 5b are arranged on the front and back surfaces of the substrate 4, the rotation angle of the rotating body 3 can be detected respectively, and any one of the failures can be detected at an early stage. . In addition, even if one of the angle sensors fails, the throttle opening degree can be continuously detected based on the detection value of the other angle sensor, so that safety can be improved.
[0025]
Here, when the driver returns the throttle grip to the initial position, under normal conditions, the throttle valve opening is minimized based on the output signals of the angle sensors 5a and 5b (for example, idling with the vehicle propulsive force cut off). If the angle sensors 5a and 5b are both destroyed at the same time due to the vehicle falling or the like, or if the meshing failure between the roller 2 and the rotating body 3 is caused, for example, the throttle grip Even if the position is returned to the initial position (that is, when the throttle opening is minimum), a signal for returning the throttle opening may not be transmitted to the electronic control unit such as the ECU.
[0026]
In the present embodiment, such a safety problem can be solved by the initial position detecting means. That is, even in the case of the above problem, if the throttle grip is returned to the initial position, the magnet 9 comes close to the hall element 10 and a detection signal is transmitted from the hall element 10 to the electronic control device side such as an ECU. When such a detection signal is transmitted, engine control is performed so as to cut off the propulsive force of the vehicle.
[0027]
Here, the control for shutting off the propulsive force of the vehicle may forcibly stop the ignition by the engine ignition device to cause the engine to misfire, or the lowest engine output that does not propel the vehicle as in the idling state. You may make it. In any case, even if the above-described problems due to overturning occur, the vehicle will not be further propelled and the safety can be improved by returning the throttle grip to the initial position.
[0028]
Further, according to the present embodiment, the initial position detecting means comprises the magnet 9 disposed on the throttle grip side and the hall element 10 disposed on the case 11 side. Compared with the device according to the above, it is possible to provide a more reliable throttle opening detection device while preventing a decrease in life due to wear or the like.
[0029]
Furthermore, according to the present embodiment, since the Hall element 10 constituting the initial position detecting means is disposed on the substrate 4 on which the angle sensors 5a and 5b are disposed, no separate wiring is required from the Hall element. As a result, the assemblability can be improved and the throttle opening detection device can be downsized.
[0030]
Although the throttle opening detection device according to the present embodiment has been described above, the present invention is not limited to this. For example, the throttle opening is controlled by electrically detecting the rotation angle of the throttle grip. If it exists, it can be applied to other forms. That is, when the throttle grip is at the initial position, if an initial position detecting means for detecting the state is provided, the present invention can be applied to one having a single angle sensor or a conventional potentiometer. It can be done.
[0031]
The initial position detection means is not limited to the combination of the hall element and the magnet, and may be replaced with another non-contact type detection sensor as long as the initial position of the throttle grip can be detected. Of course, it is also possible to detect the initial position of the throttle grip by providing contact points on both the case and the throttle grip (including the throttle pipe as in the present embodiment) and detecting the conduction state thereof.
[0032]
Still further, in the present embodiment, the present invention is applied to the detection of the throttle opening by detecting the rotation angle of the throttle grip attached to the tip of the handlebar of the two-wheeled vehicle, but the present invention is not limited to this, The present invention can also be applied to a throttle opening degree detection device for other vehicles (for example, buggy) having a throttle grip at the end of the handlebar.
[0033]
【The invention's effect】
According to the first aspect of the present invention, the propulsive force of the vehicle can be shut off based on the detection by the initial position detecting means. Therefore, if the throttle grip is returned to the initial position, the vehicle is output regardless of the output of the detecting means such as a potentiometer. This can cut off the propulsive force and improve safety.
[0034]
According to the invention of claim 2, since the initial position detecting means comprises the magnet disposed on the throttle grip side and the hall element disposed on the case side, for example, by a detection switch having a contact or the like. In comparison, it is possible to provide a more reliable throttle opening degree detection device while preventing a decrease in life due to wear or the like.
[0035]
According to the invention of claim 3, since the hall element constituting the initial position detecting means is arranged on the substrate on which the angle sensor is mounted, it is possible to eliminate the need for separate wiring from the hall element and improve the assembling property. In addition, the throttle opening detection device can be reduced in size.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a throttle opening degree detecting device according to an embodiment of the present invention. FIG. 2 is a front view thereof. FIG. 3 is a sectional view taken along line III-III in FIG. FIG. 5 is a schematic diagram showing a rotating body and lines of magnetic force generated therefrom in the throttle opening detection device according to the embodiment of the present invention.
1 ... Throttle opening detection device 2 ... Roller (interlocking member)
DESCRIPTION OF SYMBOLS 3 ... Rotating body 4 ... Board | substrate 5a, 5b ... Angle sensor 6 ... Amplifier 7 ... Spring 8 ... Cover 9 ... Magnet (initial position detection means)
10 ... Hall element (initial position detecting means)
11 ... Case HB ... Handle bar G ... Throttle pipe

Claims (3)

An interlocking member that can rotate in conjunction with a throttle grip attached to the end of a vehicle handlebar;
Detecting means for detecting the rotation angle of the interlocking member;
A case fixed to the throttle grip base end side of the handlebar while accommodating the detection means;
In the throttle opening detection device for detecting the throttle opening based on the rotation angle of the interlocking member detected by the detection means,
A throttle opening degree detecting device, comprising: initial position detecting means for detecting an initial position of the throttle grip, wherein the propulsive force of the vehicle can be cut off based on detection by the initial position detecting means. The initial position detecting means includes a magnet disposed on the throttle grip side and a hall element disposed on the case side. When the throttle grip is in the initial position, the magnet and the hall element face each other. The throttle opening degree detecting device according to claim 1, wherein the throttle opening degree detecting device is a close position. The detecting means includes a rotating body composed of a magnet that rotates in conjunction with the interlocking member and has different poles on the surface, and an angle sensor composed of a magnetoresistive element to detect the rotational angle of the rotating body. 3. The throttle opening detecting device according to claim 2, wherein the hall element is arranged on a substrate on which the angle sensor is mounted.

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