JP3522338B2 - Wheel traction control device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheel traction control device for preventing a slip between a driving wheel and the ground when a motorcycle or the like is suddenly accelerated to start in a motocross race or the like.

[0002]

2. Description of the Related Art Conventionally, as a traction control device as described above, for example, a sensor for detecting an angular velocity of a driving wheel and a detection result by this sensor are calculated to obtain an angular acceleration, and when the angular acceleration reaches a predetermined value. A configuration that controls the engine output is known. In such a traction control device, for example, when a driving wheel slips at the start of a motocross race and the acceleration increases, the engine output is reduced, whereby the slip of the driving wheel is suppressed and the vehicle posture is adjusted or skidding is prevented. be able to.

[0003]

By the way, in the motocross race, after shifting to the general running after the start,
Rather than the driving wheels gripping the ground firmly, stable driving can be performed when the driving wheels have an appropriate skid. For example, if the driving wheel grips the ground too strongly during cornering, the driven wheel easily slips and the posture is easily lost and the turning performance becomes insufficient. Therefore, there has been a strong demand for a traction control device capable of performing appropriate control even during general driving.

The present invention has been made in view of the above circumstances, and it is of course possible to prevent the drive wheels from slipping at the time of starting, and to give an appropriate slip to the drive wheels at the time of cornering to improve the motorcycle performance. It is an object of the present invention to provide a traction control device that can adjust the posture and improve the turning performance.

[Means for Solving the Problems]

A traction control device according to claim 1.
Is a traction control device for a wheel in a vehicle driven by a drive system having an engine and a transmission means for transmitting the rotation of the engine to drive wheels, and a travel system having the drive wheels and driven wheels. in the rotation wheel traction control apparatus provided with a control means for performing traction control for preventing a slip of the drive wheels by reducing the engine output when a predetermined condition, said control means starting the vehicle Drive
If the wheel acceleration is above the threshold value or on the contact surface between the driving and driven wheels.
When the difference in peripheral speed exceeds the set value, the traction
Start the down control, after starting, performs a control to traction control end mode <br/> de not performed al the traction control a predetermined condition is fulfilled, the traction control end mode, the running system and drive system The rotational speed or the total number of rotations of at least one of the
After starts after a lapse of a predetermined time or times at least one of the running system and drive system
It is characterized in that it starts after the rolling speed or the total number of rotations reaches a preset end condition.

According to a second aspect of the present invention, in the traction control device according to the first aspect, the control means is
A timer is provided for measuring the time after the rotational speed of the drive wheels reaches a predetermined value, and the traction control end mode is started after the timer has counted the predetermined time.

According to a third aspect of the present invention, in the traction control device according to the first aspect, the control means includes:
The total number of rotations of the drive wheel is measured after the rotation speed of the drive wheel reaches a predetermined value, and the traction control end mode is started after the measured value is counted by the predetermined number of rotations.

According to a fourth aspect of the present invention, in the traction control device according to the first aspect, the control means includes:
The total number of rotations of the output shaft of the engine is measured after the rotation speed of the drive wheels reaches a predetermined value, and the traction control end mode is started after the measured value is counted by the predetermined number of rotations. .

[0009]

In the traction control device according to the first aspect of the present invention, for example, traction control is performed in which the engine output is reduced when the traveling system reaches a predetermined condition at the time of start, so that slipping of the drive wheels can be prevented. At the same time, after the rotation in at least one of the drive system and the drive system reaches a preset condition, and when the rotation in at least one of the drive system and the drive system reaches a preset end condition, the traction control prohibit mode is set. Since it is started, the traction control mode is not performed thereafter, and an appropriate slip can be given to the drive wheels at the time of cornering or the like.

In the traction control device according to the second aspect of the present invention, the traction control prohibit mode is started after a predetermined time has elapsed after the rotation speed of the drive wheels exceeds a predetermined value, so that the threshold value of the rear wheel rotation speed is set. By setting appropriately, for example, by preventing the timer from being set by slowly traveling to the start point, traction control can be performed at the start to reliably prevent the rear wheels from slipping and By setting the setting time of about 2 seconds, for example, the traction control prohibition mode can be surely started before entering the corner.

Also in the traction control device according to the present invention, the traction control prohibit mode is started when the vehicle travels a predetermined distance after the rotational speed of the drive wheels exceeds a predetermined value, so the travel distance until the traction control ends. By appropriately setting, the traction control at the start can be surely performed, and the traction control prohibition mode can be surely started before entering the corner.

Even in the traction control device according to the fourth aspect, the traction control prohibit mode is started when the engine rotates a predetermined number of times after the rotational speed of the drive wheels exceeds the predetermined value, so that the traction control is ended. By appropriately setting the total number of revolutions of the engine up to, it is possible to reliably perform traction control at the start, and it is possible to reliably start the traction control prohibition mode before entering a corner.

[0013]

【Example】

A. First Embodiment (1) Configuration of Embodiment One embodiment of the present invention will be described below with reference to FIGS. 1 to 3. FIG. 1 is a block diagram of a traction control device in which the present invention is applied to a motorcycle for motocross racing, for example. In FIG. 1, reference numeral 1 is a control unit. The control unit 1 is composed of an ignition control unit 2 for performing engine ignition control and a traction control unit 3 for performing traction control. The ignition control unit 2 and the traction control unit 3 are controlled by separate CPUs. Each operation is performed in parallel.

First, the ignition controller 2 will be described.
In FIG. 1, reference numeral 10 is a CDI (Capacitive Discharge Ignition) charge coil that constitutes a part of the ignition mechanism of the engine. The ignition mechanism is the charge coil 10
Besides, the power supply circuit 11 connected to the charge coil 10
A diode 12 for blocking a reverse bias to the charge coil 10, a thyristor 13 having an ignition timing signal IT as a gate input, a capacitor 14 for charging a voltage generated by the charge coil 10, and a capacitor 1.
Ignition coil 15 for causing the voltage discharged from No. 4 to flow in the primary coil to generate a high voltage in the secondary coil;
And a spark plug 16 for generating a spark by the induced voltage of No. 5 and igniting the compressed air-fuel mixture in the combustion chamber.

Next, the detected elements (each not shown) made of a magnetic material are attached to the crankshaft of the engine,
The pickup 20 is arranged along the rotation locus of the detected element. The pickup 20 supplies a timing pulse serving as a reference of ignition timing to the engine rotation calculation circuit 21 when the detected element passes in front of the pickup 20. The engine rotation calculation circuit 21 counts the number of timing pulses to be supplied, and calculates the engine rotation speed from the supply frequency of the number of pulses. Then, speed data corresponding to the rotation speed of the engine is supplied to the digital ignition control circuit 22.

Next, reference numeral 23 is an ignition map. The ignition map 23 includes a plurality of conversion tables 23a corresponding to engine idling, medium speed range, high speed range, deceleration range, etc.
23b, 23c, 23d, each of which stores advance / retard data for the ignition reference point in the conversion table 23a ,. Then, the digital ignition control circuit 22 selects a conversion table (for example, 23a) corresponding to the opening region such as the idling of the throttle detected by the opening sensor (not shown), and the selected conversion table (23a). The lead angle / retard angle data corresponding to the engine rotation speed is read from and is supplied to the lead angle / retard angle control circuit 24. As a result, the advance / retard control circuit 24 outputs an ignition timing signal IT whose ignition timing is earlier or later than the ignition reference point by the angle indicated by the advance / retard data.

Further, the control unit 1 of the embodiment is configured to perform ignition by the hard ignition circuit 25 which does not perform the above control, in addition to the ignition based on the control of the CPU as described above. That is, for a while after the engine is started, the timing pulse from the pickup 20 is supplied to the hard ignition circuit 25, and the hard ignition circuit 25 supplies the ignition timing signal IT to the thyristor 13. In this way, the control of ignition not involving the CPU for a while after the engine is started is controlled by the noise generated at the moment when the engine is turned on.
This is to prevent malfunction of the PU. Since such ignition control only needs to be performed for a short time from the start, when the engine speed reaches the set value, the CPU
Controls the ignition by the digital ignition control circuit 22.

Next, the traction control section 3 will be described. The transmission of the engine is provided with a pickup 30 that faces the teeth of a second speed gear that always rotates integrally with the output shaft of the engine. The pickup 30 supplies a pulse signal to the rear wheel speed calculation circuit 31 when the teeth of the second speed gear pass in front of the pickup 30. The rear wheel speed calculation circuit 31 calculates the rotation speed of the rear wheel from the frequency of the supplied pulse signal. Then, the rear wheel speed data corresponding to the rotation speed of the rear wheels is supplied to the acceleration calculation circuit 32. The reason why the pickup 30 is arranged in the second speed gear is that the fourth speed gear and the fifth speed gear run idle with respect to the output shaft, and the first speed gear having a large outer diameter has a large structure, and further, This is because the third gear has a small outer diameter, which causes a problem in measurement accuracy. It should be noted that the first gear or the third gear has a pickup 3
It is also possible to arrange 0.

The acceleration calculation circuit 32 calculates the acceleration of the rear wheel from the change in the rear wheel speed data and supplies the acceleration comparison circuit 33 with the acceleration data Ad corresponding to the calculated acceleration. The acceleration comparison circuit 33 stores comparison data Cd corresponding to a preset threshold value of acceleration in a built-in memory, reads the data in the memory, and performs a subtraction [Ad-Cd]. The data of the subtraction result is supplied to the traction delay angle amount calculation circuit 34. When [Ad−Cd] ≧ 0, that is, when the acceleration of the rear wheel is equal to or greater than the set threshold value, the traction retard angle calculation circuit 34 causes the advance / retard angle control circuit 24 to perform retard data as follows. To reduce the engine output.

That is, reference numeral 35 is a traction control amount map. The traction control amount map 35 includes a plurality of conversion tables 35a, 35b, 35 adapted to various road surface conditions such as a snow road, a sandy land, a muddy land, and an unpaved road.
c, 35d, and ignition timing delay data is stored in each conversion table 35a ,. The traction retardation amount calculation circuit 34 includes a plurality of switches SW1, SW2, ... (Only two are shown in the figure) arranged in the traction control amount changeover switch unit 36.
By operating any of the above, a conversion table (for example, 35a) corresponding to the road surface condition is selected, and the delay angle data corresponding to the value of [Ad-Cd] is selected from the selected conversion table (35a). The advance angle / retard angle control circuit 24 reads this delay angle data. As a result, the advance / retard control circuit 24 adds the retard data to the advance / retard data supplied from the digital ignition control circuit 22, and the ignition is further corrected with respect to the ignition reference point. The timing signal IT is output.

When the calculation result is [Ad-Cd] ≧ 0, the acceleration comparison circuit 33 supplies a signal “1” to the traction stop control circuit 40, and the traction stop control circuit 40 advances the A switch 41 provided between the retard control circuit 24 and the traction retard amount calculation circuit 34.
To the "closed" state. As a result, the advance / retard control circuit 24 reads the retard data of the traction delay amount calculation circuit 34 and adds the near data to the advance / retard data read from the digital ignition control circuit 22.

On the contrary, when the calculation result is [Ad-Cd] <0, that is, when the acceleration of the rear wheels is less than the set threshold value, the acceleration comparison circuit 33 sends the signal "0" to the traction stop control circuit 40. ”, And the traction stop control circuit 40 sets the switch 41 to the“ open ”state. This becomes a signal of "no traction control", and the advance / retard control circuit 24 advances the advance / retard of the digital ignition control circuit 22.
Read only the retard data.

Further, the traction stop control circuit 40
Is configured to terminate the traction control mode after a lapse of a predetermined time after the rotation speed of the rear wheels reaches a preset threshold value. That is, the rear wheel speed calculation circuit 31
Also supplies rear wheel speed data to the traction stop control circuit 40. When the rear wheel speed data reaches a predetermined threshold value, the traction stop control circuit 40 causes a built-in timer to start counting time. Then, when the time counted by the timer reaches a preset time, the traction stop control circuit 40 opens the switch 41 between the advance / retard control circuit 24 and the traction delay amount calculation circuit 34. "State." Then, the CPU controls so that the state is maintained until the engine switch is turned off.

Therefore, thereafter, even when [Ad-Cd] ≧ 0, the retard data read by the traction retard amount calculation circuit 34 is supplied to the advance / retard control circuit 24. Therefore, the advance / retard control circuit 24 reads only the advance / retard data of the digital ignition control circuit 22 and supplies the ignition timing signal IT to the thyristor 13. Therefore, even if the rear wheel acceleration may exceed the set threshold value thereafter, the traction control is not performed.

(2) Operation of the embodiment A. Ignition Control Next, the operation of the embodiment will be described with reference to FIGS. 2 and 3. FIG. 2 is a flowchart showing the operation performed by the ignition control unit 2, and FIG. 3 is a flowchart showing the operation performed by the traction control unit 3. First, the operation of the ignition control unit 2 will be described. When the engine is turned on, each memory is initialized (step SPa1), and then
In step SPa2, it is determined whether the engine 20 timing pulse is being supplied from the pickup 20. Then, when the timing pulse is not supplied, the determination in step SPa2 is “NO”, and the process circulates in step SPa2 until the timing pulse is supplied.

Next, when the engine is rotated by, for example, a kick starter or the like, the pickup 20 supplies a timing pulse indicating the ignition reference point.
The determination in step SPa2 is “YES”, the process proceeds to step SPa3, and the engine speed data stored in the temporary storage memory of the engine speed calculation circuit 21 is “1”.
Is incremented only. Next, in step SPa4, the engine rotation calculation circuit 21 calculates the rotation speed of the engine. That is, the engine rotation calculation circuit 2
1 stores the supply timing of the timing pulse in the temporary storage memory, and when the next timing pulse is supplied, the two are subtracted to calculate the rotation speed of the engine.

Next, in step SPa5, the CPU determines whether the engine rotation speed calculated by the engine rotation calculation circuit 21 is equal to or higher than a set value. Step S
When the engine speed is less than the set value at Pa5, the determination result at step SPa5 is "NO", the process proceeds to step SPa6, and the ignition timing signal IT is supplied from the hard ignition circuit 25 to the thyristor 13. As a result, ignition at the spark plug 16 is performed.
In this way, when the engine rotation speed does not reach the set value, SPa2 to SPa6 are circulated, and ignition is performed without CPU control.

On the other hand, when the engine speed becomes equal to or higher than the set value, the determination in step SPa5 becomes "YES", the process proceeds to step SPa7, and the ignition control by the CPU is performed. That is, in step SPa7, the digital ignition control circuit 22 selects the conversion table (for example, 23a) of the ignition map 23 corresponding to the opening area of the throttle, and from the selected conversion table (23a), the progress corresponding to the engine rotation speed is selected. Read angle / retard data. Then, this advance angle / retard angle data is read by the advance angle / retard angle control circuit 24 (step SPa8), and the retard angle control circuit 24 compares the ignition reference point with the angle indicated by the advance angle / retard angle data. And outputs an ignition timing signal IT whose ignition timing is early or late to the thyristor 13 (step SP
a9). In this way, when the engine speed is equal to or higher than the set value, SPa2 to PSPa9 are circulated and the ignition control is performed by the CPU. In step SPa8, the advance / retard control circuit 24 also reads the retard data of the traction control, adds the retard data and the advance / retard data, and outputs the ignition timing signal IT. Further correct and output.

B. Traction Control Next, the operation of the traction control unit 3 will be described with reference to FIG. When the engine is turned on, each memory is initialized and the timer is reset (step SPb1). Next, in step SPb2, the traction retardation amount calculation circuit 34 operates the operated switch S.
The conversion table 35a, ... Of the traction control amount map 35 corresponding to W1 ,. For example, when a driver operates a switch (for example, SW1) according to a road surface condition such as sandy land and the engine switch is turned on in that state, the traction retard angle calculation circuit 34 corresponds to the switch SW1. The conversion table 35a is stored in a temporary storage memory. Further, for example, when the switch SW2 is operated after the engine is turned on, the traction delay angle calculation circuit 34 overwrites and stores the conversion table 35b corresponding to SW2 in the temporary storage memory.

Next, the process proceeds to step SPb3, and it is determined whether or not the pulse signal from the pickup 30 for detecting the rotation of the rear wheels is supplied to the rear wheel speed detection circuit 31. If the rear wheels are not rotating, step SPb
The determination at 3 is "NO", and the process goes through steps SPb2 and SPb3 to wait for the signal to be supplied. on the other hand,
When the rear wheels rotate, a pulse signal is supplied from the pickup 30, so the determination result in step SPb3 is "Y.
ES ”, the process proceeds to step SPb4 to calculate the rotation speed of the rear wheels. In step SPb4, the rear wheel speed calculation circuit 31 calculates the rotational speed of the rear wheel from the time difference between two consecutive signals supplied from the pickup 30.

Next, in step SPb5, it is determined whether the rotation speed of the rear wheels is equal to or higher than a threshold value. If the rotation speed of the rear wheels is equal to or higher than the threshold value, the determination result in step SPb5 is "YES", and the process proceeds to step SPb6 to determine whether or not the timer of the traction stop control circuit 40 is not set. Then, if the timer is not set, the determination result of step SPb6 is "YES", and the process proceeds to step SPb7 to set the timer.
This causes the timer to start counting time.

On the other hand, if the timer has already been set, the process proceeds to step SPb8, and it is determined whether or not the time counted by the timer is within the set time. Here, if the determination result in step SPb5 is "NO", that is, if the rotation speed of the rear wheels is less than the threshold value, the process proceeds to step SPb8, and if the timer is not set at that time, the setting is performed. Treat as within time. Then, if it is within the set time, the determination result in step SPb8 is "YES", and the process proceeds to step SPb9 to calculate the acceleration of the rear wheel.

In step SPb9, the acceleration calculating circuit 32 calculates the acceleration of the rear wheels by performing differentiation using the speed data supplied from the rear wheel speed detecting circuit 31 as a variable.
Next, in step SPb10, it is determined whether the acceleration of the rear wheels is equal to or greater than a preset threshold value. Step SP
In b10, the acceleration comparison circuit 33 subtracts the data Cd corresponding to the threshold value stored in the built-in memory from the acceleration data Ad supplied from the acceleration calculation circuit 32.

When [Ad-Cd] <0,
The determination result in step SPb10 becomes "NO", and the flow proceeds to step SPb11. In step 7SPb11,
When the switch 41 is set to the “open” state, the signal “no traction control” is given to the advance / retard control circuit 2.
4 and the ignition is performed only by the advance / retard data of the digital ignition control circuit 22. Thus, when the acceleration of the rear wheels is less than the threshold value, steps SPb2 to SPb
Ignition control without traction control is performed by circulating b11.

On the other hand, when the acceleration of the rear wheels is equal to or greater than the threshold value, the determination result in step SPb10 is "YES", and the process proceeds to step SPb12 to calculate retard angle data for traction control. The traction retard control amount calculation circuit 34 stores the conversion table (35a) of the traction control amount map 35 corresponding to the operated switch (for example, SW1), and the selected conversion table (35a) in step SPb11. From above [Ad
The retard data corresponding to the value of −Cd] is read. next,
In step SPb12, the retard angle data is supplied to the advance / retard angle control circuit 24 (step SPa8 in FIG. 2).

As a result, the advance / retard control circuit 24 is
The retard data is added to the advance / retard data supplied from the digital ignition control circuit 22, and the ignition timing signal IT further corrected with respect to the ignition reference point is output. Thus, when the time counted by the timer is within the set time and the acceleration of the rear wheels is equal to or greater than the predetermined threshold value, steps SPb2 to SPb8 to SPb13.
Ignition control by traction control is performed.

The above is the operation when the time counted by the timer is within the set time. When a predetermined time elapses after the rotation speed of the rear wheels reaches the threshold value, step SP
The determination result in b8 is “NO”. Then, the process proceeds to step SPb11, the switch 41 is set to the “open” state, the signal “no traction control” is supplied to the advance / retard control circuit 24, and the advance of the digital ignition control circuit 22 is advanced. -Ignition is performed only by retard data. In this way, after counting the set time with the timer,
The steps SPb2 to SPb8 and SPb11 are circulated.
Therefore, even if the rear wheel acceleration becomes equal to or higher than the threshold value, the traction control is not performed and the traction control prohibition mode is started.

In the traction control device having the above structure, the traction control is performed at the time of starting to reduce the engine output, so that the slip of the rear wheels can be prevented and the rotational speed of the rear wheels reaches the threshold value at the time of starting. After a predetermined time has elapsed , the traction control prohibit mode is started (that is, the traction control mode ends), so it is possible to give an appropriate slip to the drive wheels at the time of cornering etc. It is possible to improve the turning property.

In particular, in the above embodiment, the traction control mode is terminated after the set time elapses after the rotational speed of the rear wheels reaches the threshold value. Therefore, by appropriately setting the threshold value of the rotational speed of the rear wheels, for example, the start By preventing the timer from being set due to slow traveling to the point, traction control can be performed at the start to prevent the rear wheels from slipping, and the timer setting time is set to about 2 seconds, for example. By doing so, the traction control mode can be surely ended before entering the corner.

B. Second Embodiment Next, a second embodiment of the present invention will be described with reference to FIGS. 1 and 4. The second embodiment is characterized in that the traction control mode is ended when the total number of rotations after the rotation speed of the rear wheels reaches the threshold value reaches a predetermined threshold value.

In the second embodiment, the traction stop control circuit 40 calculates from the time counted by the built-in timer and the rotation speed of the rear wheels, calculates the rotation speed of the rear wheels, and obtains data indicating the rotation speed. It is configured to be stored in a built-in memory and to add the value of the rotation speed as time passes.

Next, the operation of the second embodiment will be described with reference to FIG. In this embodiment, from memory initialization and timer reset (step SPc1) to rear wheel rotation speed calculation (step SPc4), the same processing as steps SPb1 to SPb4 of the first embodiment is performed. In the next step SPc5, the traction stop control circuit 40
Calculates the rear wheel rotation speed from the rear wheel speed data supplied from the rear wheel speed calculation circuit 31 and the time counted by the built-in timer, and adds this value to the rear wheel rotation speed data. Since the timer is set when the rotation speed of the rear wheels reaches the threshold value and starts counting time, the rear wheel rotation speed is not added before the timer is set.

Next, in step SPc6, it is determined whether or not the rotation speed of the rear wheels is equal to or higher than a threshold value. If the rotation speed of the rear wheels is equal to or higher than the threshold value, the determination result in step SPcb6 becomes "YES", and the process proceeds to step SPc7 to determine whether or not the timer of the traction stop control circuit 40 is not set. If the timer has not been set, the process proceeds to step SPc8 to set the timer and start counting time. Next, in step SPc9, the memory in which the data of the rear wheel rotation speed is stored is cleared. Next, steps SPc10 and S
The process proceeds to Pc11 in sequence, and thereafter, as in step SPb9 and subsequent steps of the first embodiment, data for traction control or a signal "no traction control" is sent according to the value of the rear wheel acceleration. Supply to 2.

On the other hand, if the timer has already been set, the determination in step SPc7 is "NO", and the flow advances to step SPc15 to check if the total number of rotations of the rear wheels after the timer is set is within the set number. judge. Further, when the rotation speed of the rear wheels is less than the threshold value, the determination result in step SPc6 is “NO”, and in this case also, step SP
Go to c15. Then, when the total number of rear wheel rotations is within the set number, the determination in step SPc15 is “YES”, and the sequence proceeds to steps SPc10 and SPc11,
Ignition is performed by traction control when the acceleration of the rear wheels is equal to or greater than a predetermined threshold value.

Next, when the total number of rotations of the rear wheels after the timer is set is equal to or greater than the set number, the determination result in step SPc15 is "NO", and the flow advances to step SPc14 to ignite a signal "no traction control". It is supplied to the control unit 2. Then, after that, steps SPc2 to SPc15, S
Ignition control without traction control is performed by circulating Pc14. Therefore, thereafter, even if the rear wheel acceleration becomes equal to or higher than the threshold value, the traction control is not performed.

In the traction control device having the above structure, the traction control is ended after the motorcycle has traveled a predetermined distance after the rotational speed of the rear wheels reaches the threshold value. Therefore, the travel distance until the traction control is ended is appropriately set. By doing so, the traction control at the start can be surely performed, and the traction control mode can be surely ended before entering the corner.

C. Third Embodiment Next, a third embodiment of the present invention will be described with reference to FIGS. The third embodiment is characterized in that the traction control mode is terminated when the total rotation speed of the engine reaches a set value after the rotation speed of the rear wheels reaches the threshold value. In this embodiment, as indicated by the one-dot chain line in FIG. 1, the traction stop control circuit 40 is configured to read the data of the total engine speed counted by the engine speed calculation circuit 21.

Next, the operation of the third embodiment will be described with reference to FIG. In this embodiment, the same processes as SPb1 to SPb4 of the first embodiment are performed from memory initialization and timer reset (step SPd1) to rear wheel rotation speed calculation (step SPd4). In the next step SPd5, the traction stop control circuit 40
Reads out the total engine speed from the engine speed calculation circuit 21.

Next, in step SPd6, it is determined whether or not the rotational speed of the rear wheels is equal to or higher than a threshold value. If the rotation speed of the rear wheels is equal to or higher than the threshold value, the determination result in step SPdb6 is "YES", and the process proceeds to step SPb7 to determine whether or not the timer of the traction stop control circuit 40 is not set. If the timer has not been set, the process proceeds to step SPd8 to set the timer and start counting time. Next, in step SPd9, the data of the total engine speed stored in the engine speed calculation circuit 21 is reset. As a result, the subsequent engine rotation speed data indicates the total rotation speed after the rotation speed of the rear wheels reaches the threshold value.
Next, step SPd10 and SPd11 are sequentially performed,
After that, as in step SPb9 onward in the first embodiment,
Data for traction control or a signal "no traction control" is supplied to the ignition control unit 2 according to the value of the rear wheel acceleration.

On the other hand, if the timer has already been set, the determination at step SPd7 becomes "NO", and the routine proceeds to step SPd15, at which it is determined whether the total number of revolutions of the engine after the timer is set is within the set number. To do. When the total engine speed is within the set number, the determination in step SPd15 is "YES", and step S
Pd10 and SPd11 are sequentially advanced so that ignition by traction control is performed when the acceleration of the rear wheels is equal to or higher than a predetermined threshold value.

Next, when the total number of revolutions of the engine after the timer is set exceeds the set number, the determination result in step SPd15 becomes "NO", the flow proceeds to step SPd14 and the signal "no traction control" is given to the ignition control. Supply to part 2. Then, after that, steps SPd2 to SPd1
5, SPd14 is circulated, and ignition control without traction control is performed. Therefore, thereafter, even if the rear wheel acceleration becomes equal to or higher than the threshold value, the traction control is not performed.

In the traction control device having the above-described structure, the traction control is terminated after the engine has rotated a predetermined number of times after the rotation speed of the rear wheels reaches the threshold value. Therefore, after the rotation speed of the rear wheels reaches the threshold value. By appropriately setting the total number of revolutions of the engine, the traction control at the start can be surely performed, and the traction control mode can be surely ended before entering the corner.

D. Modifications The present invention is not limited to the above embodiments, but various modifications such as the following are possible. (1) after the rotational speed of the composite rear wheels of the embodiments have reached the threshold, the time measured by the timer reaches the set time, and the traction control when the total number of revolutions of the rear wheel reaches the set rotational speed It may be configured to end. For example, the rotational speed of the rear wheels may reach a threshold value while the vehicle is traveling to the start point of the race. In such a case, in the first embodiment, it is possible that the traction control mode ends while waiting for the signal to start the race. Therefore, if the configuration in which the first embodiment and the second embodiment are combined as described above is adopted, even if the rotation speed of the rear wheels reaches the threshold value and a considerable time elapses, the rear wheels reach the predetermined rotation speed. If it does not reach, the traction control mode does not end, so slippage at the start can be prevented.

On the contrary, the rear wheel may slip and rotate a considerable number of times in the initial stage due to too rapid acceleration at the start. In such a case, in the second embodiment, the traction control mode may end at the start stage. Even in such a case, the traction mode does not end until a predetermined time elapses after the rotation speed of the rear wheels reaches the threshold value, so that the slip at the start can be prevented.

As a further modification of the combined embodiment of the first and second embodiments, a predetermined time elapses after the rotational speed of the rear wheels reaches a threshold value or the total rotational speed of the rear wheels is set to a set value. The traction control mode may be terminated when the above condition is reached. In addition, the first and third embodiments, the second and third embodiments, or the first and third embodiments
It is also possible to combine the second and third embodiments.
At that time, the traction control mode may be terminated when all the conditions (for example, the elapsed time and the total engine speed) are satisfied, or the traction control may be performed when any one of the conditions is satisfied. It can also be configured to end the mode.

(2) Conditions for Starting Traction Control The present invention is not limited to the configuration in which the threshold value of the rear wheel acceleration is used as the condition for starting traction control as in the above embodiment.
The traction control may be started when the peripheral speed difference between the front and rear wheel contact surfaces becomes equal to or greater than a set value.

(3) Conditions for ending the traction control mode After the rotational speed of the rear wheels reaches the threshold value, the traction control mode is ended when the rotational speed of the engine and / or the rotational speed of the rear wheels reaches a predetermined value. It may be configured as follows. In addition, a sensor for rotation detection is installed on the front wheel,
The traction control mode may be terminated when the rotational speed and / or the total rotational speed of the front wheels reach a predetermined value after the rotational speed of the rear wheels reaches the threshold value. Further, such a condition for ending the traction control mode and a condition for ending the traction control mode in the first to third embodiments may be combined in an AND or OR relationship.

(4) Conditions for starting the termination of the traction mode In the above embodiment, the timer is set when the rotational speed of the rear wheels exceeds the threshold value, and the time is measured when the rotation speed of the rear wheels exceeds the threshold value. (The first embodiment), or the total number of rotations of the rear wheels is measured (the second embodiment), or the total number of rotations of the engine is measured (the third embodiment), and those measured values exceed the set values. However, various conditions can be selected as the condition for starting the measurement. For example, the above-described measurement can be started when the rotational speed of the driven wheels becomes equal to or higher than the threshold value. Alternatively, a threshold value of the engine rotation speed can be set, and this threshold value can be used as a condition for starting measurement. In this case, it is not appropriate to start the measurement when the engine is idle, so a sensor that detects the clutch and gear position is provided, and the rear wheel is rotating based on the detection results of these sensors. The measurement is started only when it is determined.

Further, the measurement may be started when the condition described in (3) above is satisfied, or (4)
After the condition described in (3) is satisfied, the measurement may be started when the condition (3) is satisfied.

(5) Mechanism for Decreasing Engine Output The present invention is not limited to the retard control as in the above embodiment, but various modifications are possible. For example, the ignition may be thinned out, or the throttle valve may be throttled.

[0061]

As described above in detail, according to the traction control device of the present invention, it is possible to prevent the drive wheel from slipping, for example, at the time of starting, and also to properly slip the drive wheel at the time of cornering. By giving the angle, the posture of the motorcycle can be adjusted and the turning performance can be improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing an electric circuit according to an embodiment of the present invention.

FIG. 2 is a flowchart showing an ignition operation in the embodiment of the present invention.

FIG. 3 is a flowchart showing the operation of traction control in the first embodiment of the present invention.

FIG. 4 is a flowchart showing an operation of traction control in the second embodiment of the present invention.

FIG. 5 is a flowchart showing the operation of traction control in the third embodiment of the present invention.

[Explanation of symbols]

3 ... Traction control section (control means), 21 ... Engine rotation calculation circuit, 30 ... Pickup (sensor), 31 ...
Rear wheel speed calculation circuit 33 ... Acceleration comparison circuit 40 ... Traction stop control circuit

Continuation of the front page (56) References JP-A-6-66170 (JP, A) JP-A-1-145242 (JP, A) JP-A-3-202645 (JP, A) JP-A-1-197161 (JP , A) JP-A-6-66169 (JP, A) JP-A-4-128569 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) F02D 29/00-29/06

Claims (4)

(57) [Claims] 1. A traction control device for a wheel in a vehicle driven by a drive system having an engine and a transmission means for transmitting the rotation of the engine to drive wheels, and a traveling system having the drive wheels and driven wheels. In a wheel traction control device including a control means for performing traction control for preventing slip of the drive wheels by reducing an engine output when the rotation of the traveling system becomes a predetermined condition, the control means comprises: When the vehicle starts, the driving wheel acceleration is below the threshold
Set the peripheral speed difference between the top or the contact surface between the driving wheel and the driven wheel
The above traction control is started when the value exceeds the value,
After starting, performs a control to traction control end mode is not performed al the traction control a predetermined condition is fulfilled, the traction control end mode, rotation in at least one of the running system and drive system
A certain amount of time has passed after the speed or total number of revolutions reached a certain value
And start from or rotational speed or total rotation of at least one of the running system and drive system
Wheel traction control system, characterized in that starting from reaching end condition number is set in advance. 2. The control means includes a timer for measuring time after the rotation speed of the drive wheels reaches a predetermined value,
The wheel traction control device according to claim 1, wherein the traction control end mode is started after the timer counts for a predetermined time. 3. The control means measures the total number of rotations of the drive wheel after the rotation speed of the drive wheel reaches a predetermined value.
The wheel traction control device according to claim 1, wherein the traction control end mode is started after the measured value is counted by a predetermined number of revolutions. 4. The traction control is performed after the control means measures the total number of revolutions of the output shaft of the engine after the rotational speed of the drive wheels reaches a prescribed value, and the measured value is counted by the prescribed number of revolutions. The wheel traction control device according to claim 1, wherein the end mode is started.