JPH04306136A - Maximum speed control of vehicle - Google Patents

Abstract

PURPOSE:To cancel maximum speed control of a vehicle only through an opera tion of acceleration pedalling when the cancellation of the control is needed in a most urgent occasion. CONSTITUTION:An operational amount adjustment device 3 is placed between an acceleration pedal 1 and a power level adjustment device 4 of a prime mover, and the operational amount of the operational amount adjustment device is adjusted based on the comparison between actual speed and reference maximum speed, and maximum speed control is carried out by the adjustment control. When the acceleration pedal exceeds a predetermined pedalling level, the maximum speed control is cancelled, and the control is resumed according to the returning of the predetermined pedalling.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling the maximum speed of a vehicle.

0002

[Background Art] In recent years, expressways have been developed in developed countries including Japan, and the performance of large vehicles has improved, and not only ordinary passenger cars but also many of these large vehicles can drive at considerable high speeds exceeding the speed limit. It is carried out. Since there are many problems with such large vehicles traveling at such high speeds, it has recently been proposed that the maximum speed of these large vehicles should be limited within a certain limit.

0003

However, there are problems with simply limiting the maximum speed of these large vehicles to a constant speed. When an obstacle such as road construction suddenly appears in front of the large vehicle, and there are many other vehicles following behind, it is better to accelerate instead of applying the brakes. , there are cases where the driving lane has to be changed. An object of the present invention is to provide a maximum speed control method for a vehicle that also addresses such problems.

0004

[Means for solving the problem] An operation for adjusting the amount of pedal operation between a pedal (so-called accelerator pedal) that operates the power level of a power level adjusting device such as a fuel injection pump and the power level adjusting device. A volume control device is installed. Furthermore, the actual running speed of the vehicle, which is driven by the power of the prime mover set based on the power level, is compared with the set reference speed.

[0005] As a result of the comparison, when the traveling speed is higher than the reference speed, the operation amount is reduced in the operation amount adjustment device. That is, when the pedal is depressed to the extent that the traveling speed exceeds a predetermined reference speed, the maximum speed is automatically set by controlling the operation amount of the operation amount adjustment device to decrease. Conversely, in a state where the traveling speed is lower than the reference speed, the manipulated variable in the manipulated variable adjustment device is increased toward the original position of the manipulated variable adjuster. That is, the operation amount of the operation amount adjustment device is increased toward the original position, in other words, the operation positional relationship between the pedal and the power level adjustment device is returned to the original positional relationship before the start of control.

Furthermore, when the pedal is depressed more than a predetermined amount, the pedal is depressed in response to a signal that causes the operation amount adjustment device to operate while the operation amount in the operation amount adjustment device continues to increase toward the original position. control state. In other words, as mentioned above, in this state, the operating positional relationship between the pedal and the power level adjustment device returns to the original positional relationship, so the maximum speed control is canceled and acceleration exceeding the reference maximum speed is not possible. It becomes possible. In response to the release, when the depression is returned by a predetermined amount or more, the returned signal causes the operation amount adjusting device to restart the operation. This means that when the pedal is depressed by a predetermined amount or more, the maximum speed control is activated due to the return signal, that is, at the same time as the return signal, or after a predetermined period of time after the return signal is issued. return.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a system diagram showing a vehicle control device for carrying out the maximum speed control method of a vehicle according to the present invention. In FIG. 1, a pedal 1 for accelerating the vehicle is anchored to a fulcrum 1a on the floor of a driver's seat of a vehicle, a rod 1c is linked between the pedal 1 and a lever 2, and a rod 1c is connected to a fulcrum 1a. is given a force to the left by a spring 2b, and the lever 2 has its lower end attached to a fulcrum 2.
It is attached to a. The operation amount adjustment device 3 is a cylinder 3b.
A rod 3a fixed to the piston 3c is linked to the lever 2, a piston 3c is fitted into the cylinder 3b so as to be able to slide in the axial direction, and a rod 3f fixed to the piston 3c is linked to the lever 4c.
In the cylinder 3b, the urging force of the spring 3e urges the piston 3c to the right.

The calculator 6 receives a signal from the switch 1b,
A signal from the vehicle speed detector 6a and a signal line 6b from a manual switch (not shown) are input, and the output of the calculator 6 is input to the valve 7.
is being input. The valve 7 forces the compressed air from the air tank 5 into the displacement chamber 3d in proportion to the absolute value of the command signal value from the calculator 6, and when the sign of the signal value is positive,
When the sign of the signal value is negative, the configuration is such that the air from the displacement chamber 3d is released to the atmosphere. Further, an output signal line 6c from the calculator 6 is output to an alarm lamp 8. A power level adjusting device 4, which adjusts the power level by a lever 4c, such as a fuel injection pump in a diesel engine, is configured to set the output power level of the prime mover that drives the drive wheels of the vehicle. .

The effects of the above embodiments of the present invention will be explained below. When the vehicle shown in FIG. 1 is running at a speed below the reference maximum speed set in the calculator 6, air in the displacement chamber 3d passes through the pipe 7a to the valve 7.
It is open to the atmosphere. That is, the piston 3c is set at the right end of the cylinder 3b by the biasing force of the spring 3e, and the fact that it is set at the right end means that the control value of the manipulated variable adjustment device 3 remains set at the original position. Become.

[0010] Therefore, the operation when the vehicle is running at a speed below the maximum vehicle speed is as follows. When the pedal 1 is depressed in the direction 1A, the rod 1c moves the lever 2 clockwise around the fulcrum 2a against the urging force of the spring 2b, and this movement is caused by the movement of the rod 3a, the spring 3e,
The lever 4c is moved in the direction of arrow b via the piston 3c and rod 3f. In this case, the spring 3e has a sufficiently large mounting load so that the spring 3e does not bend due to the movement of the rod 3a. The movement in the direction of the arrow b is via the shaft 4b,
The output power level of the prime mover is increased in proportion to the movement. As a result, the traveling speed of the vehicle increases. in this case,
As described above, since the piston 3c remains set at the right end of the cylinder 3b, the amount of movement of the pedal 1 and the amount of movement of the lever 4c are proportional. Also, conversely, pedal 1
As you can understand from the above explanation, when you return the
4c is operated in the direction of arrow a, the output power level of the prime mover decreases, and the traveling speed of the vehicle decreases.

When the vehicle travels at a speed lower than the maximum vehicle speed, the effect when the vehicle travels exceeds the maximum vehicle speed is as follows. The calculator 6 always detects the actual traveling speed of the vehicle by detecting the rotational speed of the wheels with the detector 6a, and calculates the actual traveling speed and a reference value set in the calculator 6 (for example, 100 km/h). is compared with the value of As mentioned above, when the depression of the pedal 1 increases and the vehicle's running speed eventually exceeds the above reference value, the calculator 6
As a result of the comparison in , the sign of the difference between the actual vehicle running speed from the detector 6a and its reference value becomes positive.

[0012] When the above comparison result becomes positive in this manner, the calculator 6 issues the following command to the valve 7. That is, the communication between the pipe line 7a and the atmosphere is closed, and the pipe line 5a and the pipe line 7a are made to communicate with each other. As a result, the compressed air in the air tank 5 is transferred to the pipe 5.
a, the gas is fed under pressure to the displacement chamber 3d via the valve 7 and the pipe line 7a, and the relative distance between the rods 3a and 3f decreases.

[0013] Reducing the relative distance between the rods 3a and 3f in this way causes the lever 4c to return to the arrow a side, lowering the power setting level of the power level adjusting device 4, and eventually this This means that the operation amount adjusting device 3 is the pedal 1.
This means that the amount of operation is reduced. When the manipulated variable adjusting device 3 decreases its power level in this way, the traveling speed of the vehicle eventually decreases to the above-mentioned reference value, and the feedback value detected by the detector 6a, which is the actual traveling vehicle speed, is When and the reference value become equal, the calculator 6 closes the valve 7 to seal the displacement chamber 3d. That is, as long as the relative distance between the rod 3a and the rod 3f is fixed, and as a result, the depression position of the pedal 1 is fixed and the running resistance of the vehicle does not change, the running vehicle speed will be the set maximum vehicle speed corresponding to the above reference value. maintain.

After the above-mentioned running, when the vehicle speed of the vehicle decreases below the above-mentioned reference value due to the pedal 1 being released or the running resistance of the vehicle increasing, the calculator 6 causes the valve 7 to
A signal with a negative sign is transmitted to close the conduit 5a and open the conduit 7a to the atmosphere. When the pipe 7a is opened to the atmosphere in this way, the air in the displacement chamber 3d is discharged to the atmosphere via the pipe 7a and the valve 7, so the piston 3c is moved to the right by the biasing force of the spring 3e. being returned. That is, the control value of the manipulated variable adjustment device 3 returns to its original position. This means that rod 3a and rod 3
As a result of the return, the rod 3f moves the lever 4c in the direction of the arrow b, thereby adjusting the power setting level of the power level adjustment device 4. It is bound to increase.

However, if the speed at which air is discharged from the displacement chamber 3d into the atmosphere is slowed down, the power setting level of the power level adjustment device 4 will be increased slowly in this state, and the increase in the power setting level of the power level adjustment device 4 will be done slowly, contrary to the driver's will. Therefore, the vehicle running speed will not suddenly increase. Another example of such a gradual increase in speed is when the vehicle approaches a downhill slope, and the speed of the vehicle increases regardless of the driver's will. go. In such a case, if the driver desires to keep the traveling speed constant, the driver usually releases the pedal 1 to keep the traveling speed constant. In this way, when the control value of the manipulated variable adjusting device 3 returns to the original position, the power level gradually increases, and the driver desires to keep the traveling speed constant. In this case, the driver can simply return the pedal 1.

As described above, when the calculator 6 is controlling the maximum speed of the vehicle, an obstacle such as a road construction suddenly appears in front of the vehicle, and many other vehicles are behind it. If you are driving continuously, accelerate your vehicle and reduce its driving speed rather than applying the brakes.
There are cases where it is necessary to change the In such a case, the driver depresses the pedal 1 strongly to try to rapidly accelerate the speed of the traveling vehicle. As a result, the pedal 1 is depressed beyond the position of the virtual line 1A. Then, the switch 1b is turned on, and the on signal is input to the calculator 6, which causes the calculator 6 to interrupt the maximum set vehicle speed control described above. That is, the command to valve 7 closes line 5a and leaves line 7a open to the atmosphere. As a result, the driver can accelerate up to the original capability limit of the vehicle, which is released from the maximum set vehicle speed control.

[0017] When it is no longer necessary to cancel the maximum set vehicle speed control, the driver returns the pedal 1. As a result, the depression of the switch 1b by the pedal 1 is released, the switch 1b is turned off, and in response to the off signal, the calculator 6 starts the maximum set vehicle speed control described above again. Also, while the maximum set vehicle speed control mentioned above is canceled,
The calculator 6 flashes the warning lamp 8 to warn that the maximum set vehicle speed control has been canceled. This warning is
The alarm may be a buzzer or the like. In addition, when the maximum set vehicle speed control is canceled in this way, a warning light installed on the outside of the vehicle for which the maximum set vehicle speed control has been canceled alerts other vehicles to the maximum set vehicle speed. A warning may be given that the control has been released.

The switch 1b for canceling the maximum set vehicle speed control has a stronger depression resistance than the depression resistance of the pedal 1 for turning on the switch. Therefore, during normal driving, when the driver depresses the pedal 1 to the 1A position, the driver can feel that the resistance to the pedal 1 suddenly increases. Therefore, the driver can drive the vehicle while consciously distinguishing between the maximum set vehicle speed control state and the operation range for canceling the state.

Furthermore, although the maximum set vehicle speed control is resumed at the same time as the switch 1b is turned off, the restart is due to the off signal of the switch 1b, and the maximum set vehicle speed control is resumed after the off signal is issued. After a few seconds, the highest set vehicle speed control may be resumed. In this way, on a downhill slope where the running resistance of the vehicle is low, etc., once the pedal 1 is strongly depressed and the switch 1b is turned on, the pedal 1 does not reach 1A for the set number of seconds. Even during this period, the maximum set vehicle speed control can be canceled and the vehicle can be accelerated beyond the maximum set vehicle speed. In addition, an on signal is sent to the calculator 6 by a manual switch (not shown) on the signal line 6b, and the maximum set vehicle speed control is canceled by that signal, and when it is no longer necessary to cancel it, the signal line 6b is turned off. A means for transmitting a signal to restart the maximum set vehicle speed control may be added.

Furthermore, although the manipulated variable adjustment device 3 is of a pneumatic actuator type, this configuration does not require an electrical service.
It may be a motor. If an electric servo motor is used in this way, the calculator 6 can directly control the servo motor by electrical signals.

[0021]

[Effects of the Invention] As is clear from the above description, the effects of the present invention are as follows. The above-mentioned maximum vehicle speed control automatically regulates the maximum speed during normal driving, so it increases driving safety for both the own vehicle and other vehicles, especially on expressways where speed sense becomes dull. In addition, when it is necessary to accelerate the vehicle to ensure safety, the maximum set vehicle speed control can be canceled, making it possible to drive even more safely. Moreover, since the maximum set speed can be canceled only by depressing the pedal 1 for performing an acceleration operation, safety is particularly enhanced when sudden sudden acceleration of the vehicle is required. Furthermore, since the maximum setting speed is canceled due to the switch 1b being turned off, the maximum setting speed control may be resumed several seconds after the switch 1b is turned off. For several seconds, even if the pedal 1 is only partially depressed, acceleration exceeding the maximum set speed is possible.

[Brief explanation of drawings]

FIG. 1 is a system diagram showing a vehicle control device for carrying out a maximum speed control method for a vehicle according to the present invention.

[Explanation of symbols]

1 pedal, 1b switch, 3 operation amount adjustment device, 4 power level adjustment device, 6
Calculator, 6a detector, 8 alarm lamp.

Claims (1)

[Claims] Claim 1: Between the power level adjusting device and the pedal that operates the power level, there is provided an operation amount adjusting device that adjusts the amount of operation of the pedal, and the output of the prime mover is adjusted according to the power level. The running speed of a vehicle running on power is compared with a set reference speed, and based on the comparison, if the running speed is higher than the reference speed, the operating amount is reduced in the operating amount adjusting device to adjust the operating speed. When the pedal is smaller than the reference speed, the operation amount is increased toward the original position of the operation amount adjusting device, and when the pedal is depressed more than a predetermined amount, the pedal is depressed by a signal such that: When the manipulated variable in the manipulated variable adjustment device continues to increase toward the original position, and the pedal depression equal to or greater than the predetermined amount is returned, due to the returned signal, the manipulated variable in the manipulated variable adjustment device increases. A maximum speed control method for a vehicle characterized by restarting the operation.