JPS6280192A - transmission - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transmission system for a motorcycle.

When changing gears on a motorcycle with a conventional gear-type transmission, there are two steps: disengaging the clutch to ensure smooth gear shifting, and releasing the accelerator to prevent engine overspeed. While these steps were being performed in parallel, the change pedal was operated to enter the specified gear shift stage.

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Therefore, when changing gears, the engine speed was lowered by returning the Akvil, but the response was slightly inferior, which caused problems when trying to change gears in a short period of time.

Particularly in two-wheeled racing, requiring time to change gears makes it difficult to maintain speed and has a negative effect on steering operation, which is a problem that should be avoided.

Therefore, as a method of shifting gears without releasing the accelerator, there is a method of suppressing the ignition of the ignition device in conjunction with the operation of the change pedal.

However, there are three problems that must be solved in order to reliably derive a gear shift signal from the operation of the change pedal.

The first point is that the shift stroke of the change pedal is not equal for each gear.

The second point is to identify aerial blur caused by photographing.

The third point is to identify actions that are not intended for driving.

The present invention overcomes these difficulties, and an object thereof is to provide a speed change dynamic detection device that can reliably identify a speed change operation.

2. In a motorcycle having a gear type transmission,
It consists of a pressure sensor built into the protruding part of the change pedal, and a determining means for determining whether the output of the pressure sensor has reached a threshold value.

Therefore, when some force is applied to the pressure sensor built into the change pedal, the pressure sensor outputs an electrical signal corresponding to that force, and the judgment means determines whether the output has reached a set threshold. By making this determination, it is possible to identify whether the force applied to the change pedal is the result of the driver's intention to change gears.

Nine JLJI Embodiments of the present invention shown in the figures will be described below.

FIG. 1 is a side view of a motorcycle, in which an engine 1 is located at the center of the vehicle body, and a crankcase 2 is disposed on the l' side of the engine 1.

The change pedal 4 is located on the upper left side of the crankcase 2.
is swingably supported, and when the tip of the foot placed on the footrest 3 in the vicinity of the pedal is depressed and raised, the change pedal 4 swings and a gear shift is performed.

FIG. 2 is a plan view of the change pedal 4, in which the change pedal 4 is attached to the tip of an arm member 5 that swings up and down and is bent toward the side in the shape of a letter.

FIG. 3 is a cross-sectional view taken along the line ■--■ in FIG. 2.

The joint member 7 of the change pedal 4 fits into the tip 51 of the arm member 5 and is supported by the pin 6, so that the joint member 7
The protruding portion of the change pedal 4, which is fitted integrally with the change pedal 4, can be folded toward the vehicle body around the pin 6.

The structure of the protruding part of the change pedal 4 is as shown in Fig. 3 and Fig. 4 (cross-sectional view taken along -IV in Fig. 3), with a shaft 8 having a central cylindrical shape and flanges at both ends as the core (
The flange at one end of the shut 8 is fitted onto the joint member 7), a conductive rubber 9 is wrapped around its outer peripheral surface, an outer conductor electrode 10 is roughly wound around its outer peripheral surface, and It is covered with friction rubber 12.

The shaft 8 also serves as an electrode, and faces an outer conductive electrode 10 with a conductive rubber 9 interposed therebetween.

When external force is applied to the protruding part of the change pedal 4, which has a concentric fault structure, the middle conductive rubber 9
transforms.

When the conductive rubber 9 deforms, the resistance value between the center electrode 8 and the outer conductor electrode 10 changes.

That is, since the resistance value R of the conductor is determined by the cross-sectional area S of the conductor, when the conductive rubber 9 deforms,
As S and 1 change, the resistance IA fU R changes.

The correlation between the pressure applied to the change pedal 4 and the resistance value R is determined by the internal shape of the change pedal 4.

Generally, when a pressure F is applied to the change pedal 4, the thickness 1 of the conductive rubber 9 becomes significantly smaller, so that the resistance value R decreases in almost inverse proportion to the pressure F, as shown in FIG.

FIG. 8 is a circuit diagram of this embodiment as described later, and the center electrode 8. Conductive rubber9. When a silica sensor 11 consisting of an outer conductive electrode 10 is connected in series to a resistor 21 and a voltage is applied as shown in the figure, the voltage Vr at the connection point P between the pressure sensor 11 and the resistor 21 is Changes occur as shown in Figure 6.

That is, as the pressure F applied to the pressure sensor 11 increases, the voltage Vr also increases, but as shown in the figure, settings are made to use the voltage change portion corresponding to the change in pressure from F+ to F2.

FIG. 7 shows the relationship between the stroke of the change pedal 4 and the voltage Vr.

The shift stroke of the change pedal 4 differs for each speed, but this is just one example.The change pedal 4 is stopped at a certain stroke S1, and the shift is completed.

Therefore, when a normal gear shift is performed, the voltage Vr increases due to the pressure applied to the change pedal 4, and the stroke also changes, and when the predetermined stroke S1 is reached, the shift is completed and the change pedal 4 is stopped. As a result, the pressure rises rapidly, and the voltage VP also rises rapidly (curve L+ in FIG. 7).

Furthermore, if the shift cannot be performed, it is stopped at S2 before reaching the predetermined stroke SI, so that the pressure characteristic will be shown as curve L2.

When the change pedal 4 is operated with the intention of changing gears, the pressure characteristics shown above are exhibited, but when there is no intention of changing gears and the change pedal is merely touched, a curve as shown by the broken line in FIG. 7 is shown.

In other words, the pressure increases instantaneously relative to the stroke, but there is a limit and it quickly decreases.

Therefore, an appropriate pressure (fl (voltage J
If a threshold value is set for C (indicated by a chain line), it is possible to identify whether the operation of the change pedal 4 is intentional or not.

In addition, there are two types of intentional gear shifting operations: cases in which shifting from 1 to 1 is not possible (curve L2), and cases in which shifting is possible as a result (curve L2).
Although there is a curve L+), the present invention makes it possible to shift by lowering the engine output, especially when it is not possible to shift from 1 to 1 by operating the change pedal 4.

Therefore, a circuit (power shift units 1 to 20) for reliably detecting a gear shifting operation by disconnecting V1 based on the output voltage Vp is shown in FIG. 8 and will be described.

As mentioned above, the pressure sensor 11 is grounded via the resistor 21, but the connection point P is connected to the Schmidts 1-Trial circuit 2.
It is connected to the second input terminal.

A variable resistor 23 pulled up to the power supply Vcc is connected to the other input terminal of the Schmitt trigger circuit 22.

The output terminal of the Schmitt trigger circuit 22 is the counter 24
The output VO of one circuit 22 is a binary signal that detects a speed change operation.

In other words, by adjusting the variable resistor 23, the threshold value (output voltage ■0
A threshold value Vu that makes the output voltage vO a high value, and a threshold value VL that makes the output voltage vO a low value are set, and the voltage Vp that captures the resistance change of the pressure sensor 11 as a voltage change is set to the Schmitt trigger circuit 2.
2, and as shown in FIG. 8, when Vr > Vu, the output voltage Vo becomes high level, and when Vp < VL, it returns to low level.

When the driver depresses the change pedal 4 with the intention of changing gears, the voltage Vr exceeds the threshold Vu and a high level signal appears at the output terminal of the variable resistor 23, as shown by the solid line in FIG. In the case of a simple unintentional touch, the voltage VP does not reach the threshold Vu, as shown by the broken line in FIG.
The output signal of the Schmitt trigger circuit 22 remains at a low level.

By doing this, the third problem (identification of the intention to shift) is solved, and the first problem (identification of the intention to shift) is solved because the applied pressure is detected instead of the change pedal stroke. This also solves the problem that the shift stroke is not equal for each gear.

Since the level of the threshold value can be easily adjusted using the variable resistor 23, by setting Q and J3 to an appropriate value at the time of assembly, it is possible to reliably detect a gear shift operation.

In this embodiment, the output terminal of the Schmitt trigger circuit 22 is connected to the input terminal of the counter 24,
The output terminal of No. 4 is connected to the No. 1 terminal of the thyristor 25.

The power shift unit 2o is constituted by the above circuit.

A pulse signal is inputted to the counter 24 of the power shift 1-units 1 to 20 from the pulse coil 31 attached to the A, C, and generator 30, and when the signal vO input to the counter 24 is turned ON, the engine rotational speed is increased. (number of pulses)
counting starts.

The counter 24 keeps the gate terminal of the thyristor 25 at a high level from the start of counting until it finishes counting the predetermined number of revolutions.

The 7 node terminal of Cyrisk 25 is the ignition device CDII
The CDI unit 33 is connected to a spark plug 35 via an ignition coil 34.

The CDI unit 33 includes the A, C, and generators 30.
The generated AC voltage is supplied to the excycle coil 32, and a pulse signal is input from the pulse coil 31 to determine the timing.

While driving the motorcycle with the above circuit configuration, when the driver depresses the change pedal 4 to change gears, the pressure sensor 11 detects the pressure, and the Schmitt trigger circuit 22 detects the pressure. Determine whether the step is intentional or not, and if so, click
24 is operated.

When the counter 24 receives a signal from the Schmitt trigger circuit 22, it counts a predetermined number of rotations of the engine, and temporarily brings the thyristor 25 into a conductive state.

While the thyristor 25 is in a conductive state, the CDI unit 33
The ignition coil 34 is not operated, and the spark plug 35 stops igniting.

Therefore, when the driver depresses the engine brake pedal 4, the engine 1 reaches a predetermined engine speed or misfires, and the engine speed is rapidly lowered and the engine output is lowered, thereby facilitating the gear shifting operation.

There is no need to return the axle to the gear shift like in the past,
Gear shifting operations can be performed smoothly in a short time.

Further, in addition to this embodiment, it is also possible to avoid a decrease in engine output by one stage of the blade which retards the ignition timing instead of causing a misfire.

Also, the friction shield 12 around the pressure sensor 11
Since l is small, vibration has almost no effect on the pressure sensor 11, and the second problem (discrimination of air vibration due to vibration) is also solved.

In the above embodiment, the pressure applied to the change pedal 4 is applied to the conductive rubber 9 (the pressure formed in the concentric fault structure interposed between the two) jt? 10 and 11, embodiments of other structures are illustrated and described in FIGS. 10 and 11.

Figure 10 corresponds to the ■-■ cross-sectional view in Figure 2, and
FIG. 1 is a sectional view taken along line XI-X in FIG.

1-Shaft 4 which is the core material of the protruding part of the engine output
0 is provided with a cylindrical hole in the central axial direction, and a cylindrical hole perpendicular to the axis.

A conductive rubber 41 having electrodes at both ends is fitted into the axial hole, then a steel ball 42 is inserted, and a rod-shaped slider 43 is fitted into the hole drilled at one angle with the axial direction. .

The slider 43 is formed so that spherical surfaces are hollowed out on both sides in the axial direction, and the steel ball 42 is fitted into one spherical surface, and the newly inserted steel ball 42 is fitted into the other spherical surface.

Next, the set spring 44 is inserted, and the Ceratoscri 1-45 is screwed onto the shaft 40 so as to compress the set spring 44.

Therefore, normally the slider 43 is exposed to the steel balls 42 from both sides.
It is supported at a position where the force is balanced.

A lower end portion of the slider 43 projects upward and downward from the shaft 40, and is inserted into the inside of the friction lever 46 with the outer side of the slider 40 extending upward and downward from the shaft 40.

When pressure is applied from above the friction rubber 46 by the driver's foot, the slider 43 is pushed downward and the steel ball 42 is moved left and right against the conductive rubber 41 and the set spring 44.

Therefore, the conductive rubber 41 is compressed and deformed, changing its resistance value, and as in the previous embodiment, it is possible to detect depression of the change pedal.

The operating load of the slider can be adjusted by tightening the set screw 45.

In addition to the above-described embodiments, the deformation of the protruding portion of the change pedal can also be detected by using a structure similar to that of a strain gauge.

However, it is necessary to reduce the mass around the strain gauge to avoid the effects of vibration.

The present invention can reliably detect an intentional shift operation by depressing the change pedal at an early stage.
By causing the engine to misfire based on the detection signal, it is possible to smoothly perform a gear shifting operation in a short time without having to release the accelerator during gear shifting.

In addition to reducing time loss when changing gears, the engine speed is automatically reduced when the change pedal is depressed, allowing the driver to concentrate on steering wheel operation, making it particularly suitable for two-wheeled lasers.

[Brief explanation of drawings]

FIG. 1 is a side view of the motorcycle, FIG. 2 is a plan view of a change pedal according to an embodiment of the present invention, FIGS. 3 and 4 are sectional views thereof, and FIG. A diagram showing the relationship between pressure F and resistance value R, Figure 6 is a diagram showing the relationship between pressure F and its output voltage Vp in the same pressure sensor, and Figure 7 is a diagram showing the relationship between stroke and voltage Vp (pressure). FIG. 8 is a diagram showing the shift operation detection circuit and ignition system circuit of this embodiment, and FIG. 9 is the output voltage V of the pressure sensor when the engine pedal is depressed.
FIGS. 10 and 11 are cross-sectional views of a change pedal in another embodiment (13). ...Crankcase, 3...
Footrest, 4... Change pedal, 5... Arm member, 6... Pin, 7... Joint member, 8... Shaft (center electrode), 9... Conductive rubber, 10... Outer conductor electrode, 11... Pressure sensor, 12... Friction rubber, 20... Power shift unit, 21
...1 resistor, 22...Schmitt trigger circuit, 2
3...i+J variable resistance 4...Counter, 25...
・Suiristar, 30...△, C, generator, 31...pulse coil, 32...excycle coil, 33...CD
I unit, 34...Ignition coil, 35.
...Spark plug, 40...Shaft, 41...
Conductive rubber, 42...Steel ball, 43...Slider, 44...Set spring, 45...Set screw, 46...Friction rubber.

Claims (1)

[Claims] A motorcycle having a gear type transmission, characterized in that it comprises a pressure sensor built into a protruding part of a change pedal, and a determination means for determining whether the output of the pressure sensor has reached a threshold value. Motion detection device.