JPH0639220B2 - Vehicle skid control device - Google Patents

Description

The present invention relates to a skid control device for a vehicle.

(Prior Art) When a driving force equal to or greater than the wear coefficient (grip force) of the road surface and tires is applied to the driving wheels during starting or running of the vehicle, the driving wheels run idle (wheel spin), and the vehicle cannot start. , The accident of going off the course during cornering occurs.

For this reason, as shown in FIG. 5, the rotation speeds of the drive wheels 2a and the rolling wheels 2b of the vehicle 1 are detected by the rotation sensors 3a, 3b, and the rotation speeds are detected by the rotation speed detection units 4a, 4b. The rotation difference (ratio) is detected by the unit 5, and when this rotation difference (ratio) exceeds a predetermined value, it is determined that wheel spin has occurred, and the control unit 6
It is proposed to prevent wheel spin when the vehicle starts by outputting a "disconnect" signal from the clutch 7 or a "close" signal to the throttle 8 to control the driving force of the driving wheels 2a. (Japanese Patent Laid-Open No. 59-202
963).

However, in the above-mentioned conventional technique, since the clutch is closed or the throttle is closed after the occurrence of wheel spin is detected at the time of starting, it is not possible to prevent the occurrence of wheel spin at the time of sudden starting. There was a problem.

(Object of the Invention) The present invention has been made in view of the above-mentioned conventional problems, and predicts the occurrence of wheel spin even when the vehicle is suddenly started, and controls the clutch connection to prevent the occurrence of wheel spin. The purpose is to prevent.

(Structure of Invention) Therefore, according to the present invention, as shown in FIG.
The torque of the engine B can be changed by connecting the clutch A to the drive wheel C.
In the vehicle to be transmitted to, the clutch connection prevention means D for preventing the clutch connection, and the wheel spin prediction for predicting that wheel spin will occur when the engine speed is equal to or higher than the set value and the clutch connection speed is equal to or higher than the set value. It is configured to include a section E and a control section F that outputs a signal to the clutch connection blocking means D to stop the connection of the clutch A when the occurrence of wheel spin is predicted during the connection of the clutch A. is there.

(Effect of the Invention) According to the present invention, when the wheel spin predicting unit predicts the occurrence of wheel spin during clutch engagement at the time of starting, the clutch engagement inhibiting means inhibits engagement of the clutch. Therefore, it is possible to prevent wheel spin from occurring at the time of starting the vehicle.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 2, front wheels (driving wheels) 1 of the FF vehicle 10
1, 11 and rear wheels (rolling wheels) 12, 12 are provided with rotation speed detection sensors 13, 13, 14, 14 respectively for detecting the rotation speed, and each rotation speed detection sensor 13, 14 is connected to a controller 15. On the other hand, a throttle actuator 16 is connected to the control device 15, the throttle 18 of the engine 17 is controlled by the throttle actuator 16, and an accelerator sensor 20 for detecting the depression amount of an accelerator pedal 19 is provided. The slot actuator 16 is controlled according to the detection signal of the sensor 20.

A clutch actuator 21 is connected to the control device 15, the clutch 23 of the transmission 22 is controlled by the clutch actuator 21, and a clutch sensor 25 for detecting the depression position of the clutch pedal 24 is provided. The clutch actuator 21 is controlled according to the detection signal.

For example, as shown in FIG. 4, the clutch actuator 21 connects the clutch 23 between the transmission 22 and the drive wheel 11 to the hydraulic cylinder 26, and the hydraulic cylinder 26
Is connected to a clutch cylinder 28 interlocking with the clutch pedal 24 via a clutch connection blocking valve 27 to operate the clutch 23 in accordance with the depression position of the clutch pedal 24, while a feedback signal from a feedback potentiometer (clutch sensor) 24 is supplied. Control device 15
Detects the clutch position, the clutch connection speed, etc., and outputs a switching signal (OFF) from the control device 15 to the clutch connection blocking valve 27 when the occurrence of wheel spin is predicted during the connection of the clutch 23. The configuration may be such that the hydraulic pressure of the cylinder cylinder 28 is controlled so as not to be supplied to the hydraulic cylinder 26.

An actuator control system control unit that outputs a signal for controlling the throttle opening to the throttle actuator 16 according to the detection signal of the accelerator sensor 20 and the driving force of the drive wheels 11 when wheel spin occurs. However, a spin control system control unit that calculates a slot opening for realizing a target value that gives the maximum grip force on the road surface and outputs a signal for controlling the slot opening to the slot actuator 16 is provided. It is provided.

On the other hand, the control device 15 is provided with a wheel spin prediction unit (E) that predicts the occurrence of wheel spin.

The wheel spin prediction unit (E) is, for example, the engine 1
It is preferable to predict that wheel spin will occur when the rotation speed of 7 is a set value (for example, 3000 rpm) or more and the connection speed of the clutch 23 is the set value or more.

When the wheel spin predicting section (E) predicts the occurrence of wheel spin while the clutch 23 is connected, the control device 15 outputs an off signal to the clutch connection blocking valve 27 to connect the clutch 23. A control unit (F) for stopping is provided.

The operation of the skid control device configured as described above is
This will be described with reference to the flowchart in the figure.

In step S1, it is determined whether or not it is the measurement / control timing, and if YES, the number of revolutions of the drive wheel 11 and the interlocking wheel 12, the accelerator pedal position, the current throttle opening degree, etc. are measured in step S2.

Then, in step S3, vehicle running states such as slip rate, acceleration, and wheel spin state are detected, and step S4
It is determined whether or not wheel spin is occurring.

If it is determined to be ON (stopped) in step S4, the throttle opening corresponding to the accelerator pedal position is calculated in step S5, and if the start flag SF is "0" (stopped) in step S6, step S7 It is determined whether or not the vehicle is stopped.

Then, if YES is determined in the step S7, it is determined whether or not the clutch 23 is stepped on in the step S8, and Y is determined.
If it is determined to be ES, if the valve flag VF of the clutch connection blocking valve 27 is "0" (ON) in step S9, it is determined in step S10 whether the clutch 23 has started to be returned.

In these steps S4 to S10, it is checked whether or not the starting operation is started.

When the start operation is started, it is determined in step S11 whether the engine speed is equal to or higher than a set value (3000 rpm),
If YES is determined, the clutch 23 is released in step S12.
It is determined whether the connection speed of is equal to or higher than the set value.

If YES is determined in both steps S11 and S12, it means that wheel spin is predicted to occur. Therefore, the clutch connection blocking valve 27 is turned off in step S13, and the valve flag VF is set to "1" (step S14). Off). As a result, the connection of the clutch 23 is blocked, and the occurrence of wheel spin is prevented in advance.

After that, in step S15, it is determined whether or not the vehicle speed has risen. If NO, the clutch 23 is not engaged forever, so in step S16, the clutch engagement blocking valve 27 is engaged.
Turn on and wait for the vehicle speed to rise.

If YES in step S15, the clutch connection blocking valve 27 is turned off in step S17.

Next, in step S18, the start flag is "1".
If it is YES, it is determined in step S19 whether the clutch 23 has completely met (engaged), and in step S20 it is determined whether the vehicle speed exceeds the idle vehicle speed. If the determination is YES, step S21
Turns on the clutch connection blocking valve 27 to return the start flag SF to "0" and the valve flag VF to "0" (on), and the process proceeds to step S25.

In steps S18 to S21, it is checked whether or not the starting operation is completed.

In step S25, the throttle actuator 16 is controlled by the throttle control signal of the accelerator control system that determines the throttle opening from the accelerator pedal position, and spin control is not performed.

On the other hand, if YES (running) is determined in step S4, the control state amount (control target value) is calculated in step S22, and the throttle opening is calculated in step S23 so as to approach the target value. Steps S18, S19, S
It goes through step S21 and step S25.

In step S25, the current throttle opening and the target throttle opening are compared, a throttle control signal that produces the target throttle opening is generated, and the throttle actuator 16 is controlled by the throttle control signal of the spin control system. . As a result, the driving force of the drive wheels 11 decreases according to the running state of the vehicle, and the wheel spin is stopped.

[Brief description of drawings]

1 is a block diagram of the present invention, FIG. 2 is a block diagram of a skid control device according to the present invention, FIG. 3 is a flow chart, FIG. 4 is a block diagram of a clutch actuator, and FIG. 5 is a conventional skid control device. It is a block diagram of. 10 ... FF vehicle, 11 (C) ... Front wheel (driving wheel), 12 ... Rear wheel (rolling wheel), 13, 14 ... Rotation speed detection sensor, 15 ... Control device, 17 (B) ... Engine, 21 ... Clutch actuator , 23 (A) ... Clutch, 25 ... Clutch sensor, 27 (D) ... Clutch connection blocking valve, E ... Wheel spin prediction unit, F ... Control unit.

Claims (1)

[Claims] 1. In a vehicle for transmitting a torque of an engine to a drive wheel by connecting a clutch, a clutch connection preventing means for preventing the clutch from connecting, an engine speed being equal to or higher than a set value, and a clutch connecting speed being set to a set value. In the above cases, a wheel spin prediction unit that predicts that wheel spin will occur, and a control that outputs a signal to the clutch engagement blocking means to stop clutch engagement when clutch spin is predicted during clutch engagement. And a skid control device for a vehicle.