JPH0472445A - Driving wheel slip preventing device for vehicle - 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 (Industrial Field of Application) The present invention relates to a drive wheel slip prevention device for a vehicle that prevents drive wheels from slipping.

(Prior Art) For example, in a motorcycle, when the motorcycle is driven by the power of the engine, or when the rear wheels receive excessive driving force from the engine, the rear wheels slip between the rear wheels and the road surface.

(Problem to be solved in 1971) However, as mentioned above, when the rear wheels slip, it not only causes abnormal wear on the rear wheels, reducing their durability, but also worsens the riding feeling. Will it arrive?

The present invention has been made in view of the above-mentioned findings, and its purpose is to prevent slippage of the driving wheels.
It is an object of the present invention to provide a drive wheel slip prevention device for a vehicle that can improve the durability of the drive wheels, improve riding feeling, etc.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a slip detection means for detecting a slip state when a slip occurs between the driving wheels and the road surface due to excessive driving force of the engine; A feature of the present invention is that the drive wheel slip prevention device for a vehicle is configured to include an ignition timing control f-stage for retarding the ignition timing of the engine in response to the output signal of the slip detection means.

(Function) According to the present invention, when the slip detection means detects slippage of the driving wheels, the ignition timing control means retards the ignition timing of the engine according to the degree of slippage, thereby reducing the engine output. Therefore, slippage of the drive wheels is prevented, and a decrease in durability and deterioration of riding feeling due to abnormal wear of the drive wheels is effectively prevented.

(Example) An example of the present invention will be described below based on the accompanying drawings.

Fig. 1 is a side view of a motorcycle equipped with an anti-slip device according to the present invention, Fig. 2 is a graph showing the relationship between the rotational speed of the front wheel and the rear wheel, and Fig. 3 is a graph showing the relationship between the engine rotational speed and the ignition timing. The graph shown in FIG. 4 is a diagram showing a map for determining the amount of retardation of ignition timing from the engine speed and the amount of slip in each transmission gear.

Is the motorcycle 1 shown in FIG. 1 equipped with a slip prevention device that prevents the rear wheel 3, which is the driving wheel, from slipping? a slip detection means for detecting the
An ignition control unit (hereinafter referred to as an ignition control unit) that outputs a control signal for retarding the ignition timing of the engine to the ignition coil 4 in response to the output signal of the slip detection stage.
The IO control unit (abbreviated as IO control unit) 5 is included. The slip detection means includes a rotation sensor that detects the rotation speed of the front wheels 2 and rear wheels 3, an engine rotation sensor that detects the engine rotation speed, and a transmission gear detection sensor that detects the transmission gear (both not shown). ).

Therefore, the rotational speeds of the front wheels 2 and the rear wheels 3 detected by the rotation sensor are equal, and they change along the straight line A shown in FIG. When the speed is within the range of 1, no slip occurs in the rear wheels 3, or slip occurs in the rear wheels 3 when the speed changes along straight line B in FIG. In other words, the rotational speed of the front wheel 2 is ■1, whereas the rotational speed of the rear wheel 3 is V, which is a larger kina value V2 (If V2>V, >Yf, the rear wheel 3 receives excessive driving force from the engine. When the front wheel 2 and rear wheel 3 rotation detection signal or rotation sensor inputs it to the IO control unit 5, the IG control unit 5 calculates the slip amount ΔV of the rear wheel 3 using the following formula. and the slip ratio V° are calculated.

ΔV ” V z V + ・・・・・・(1)
v'=ΔV/V, ......(2) Tokoro,
The ignition timing of the engine is determined by the IG control unit 5.
If the rear wheels 3 are not slipping, the ignition timing of the engine is controlled along the solid line C in FIG. 3 with respect to the engine speed.

On the other hand, the IO control unit 5 has a MAR that determines the amount of retardation of the engine ignition timing when slip occurs in the rear wheels 3,
d), 3rd speed (3rd), 4th speed (4th), 5th speed (
5Lb) and top (TOP) gear) as shown in Figure 4 (However, Figure 4 only shows the MAP for 1st gear)
. For each MAP, the amount of retardation of the ignition timing can be determined from the engine speed and the amount of slip ΔV (or slip ratio V').

Then, as mentioned above, slippage of the rear wheel 3 is detected, and the I
When the G control unit 5 calculates the slip amount ΔV or the slip ratio V° from the above equation (1) or (2), the IG control unit 5 calculates the slip amount ΔV (slip ratio V') and the engine rotation sensor. Based on the engine rotational speed detected by the transmission gear detection sensor, the amount of retardation of the ignition timing is read from the MAR corresponding to the transmission gear detected by the transmission gear detection sensor, and a control signal corresponding to this is output to the ignition coil 4.

As a result, the ignition timing of the engine is retarded according to the degree of slip of the rear wheels 3, and the engine output decreases, eliminating the transmission of excessive driving force from the engine to the rear wheels 3. Slippage and compression of the wheels 3 are prevented, and a decrease in durability and deterioration of riding feeling due to abnormal wear of the wheels is effectively prevented.

That is, as shown in FIG. 3, the engine speed is N.

If slipping occurs in rear wheel 3 within the range of ~N2,
The ignition timing is retarded as shown by the dotted line in the same figure.
This engine rotational speed range Nl-N.

At this point, the engine output is reduced to prevent the rear wheels 3 from slipping.

Incidentally, if the front wheel brake operator (not shown) is operated and as a result, the front wheel 2 slips, it will not be possible to accurately detect the slip condition of the rear wheel 3, so in this case, the ignition timing control described above is not performed. It is also possible to cancel and return to normal control.

Furthermore, the above description has been made regarding an example in which the anti-slip device is particularly applied to a motorcycle, but the device of the present invention can be applied to any vehicle as long as the drive wheels are rotationally driven by the driving force of the engine. Of course.

(Effects of the Invention) As is clear from the explanation in -1- below, according to the present invention, when there is slip between the driving wheels and the road surface due to excessive driving force of the engine, the slip detection system detects the state of slip. Since the drive wheel slip prevention device of the vehicle is configured to include the means and the ignition timing control means for retarding the ignition timing of the engine in response to the output signal of the slip detection means, it is possible to prevent the drive wheels from slipping. , the durability of the drive wheels, the riding feeling, etc. can be improved.

[Brief explanation of the drawing]

Fig. 1 is a side view of a motorcycle equipped with an anti-slip device according to the present invention, Fig. 2 is a graph showing the relationship between the rotational speed of the front wheel and the rear wheel, and Fig. 3 is a graph showing the relationship between the engine rotational speed and the ignition timing. The graph shown in FIG. 4 is a diagram showing a map for determining the retardation angle of the ignition timing from the engine speed and the amount of slip in each transmission gear. l...Motorcycle (vehicle), 2...front wheel, 3...
Rear wheel (drive wheel), 4... Ignition coil, 5... Ignition control unit (ignition timing control means)
.

Claims (1)

[Claims] This is a drive wheel slip prevention device for a vehicle that runs by transmitting engine power to the drive wheels and rotating the drive wheels, which prevents the drive wheels from slipping from the road surface due to excessive drive force of the engine. A driving wheel of a vehicle characterized by comprising a slip detection means for detecting the state of the slip, and an ignition timing control means for retarding the ignition timing of the engine in response to an output signal of the slip detection means. Anti-slip device.