JPH04237836A - Automatic slip preventing device with maximum speed limit function - Google Patents

Abstract

PURPOSE:To provide an automatic slip preventing device with the maximum speed limit function by including a means to send out a control output when the vehicle speed calculated in a program control circuit exceeds the predetermined value. CONSTITUTION:A program control circuit 2 receives the output of a plurality of rotational sensors 1 and sends out the control output. A solenoid valve 5 invalidates the stepping-down quantity of an accelerator pedal 3 according to the control output. Then, the program control circuit 2 sends out the control output when the vehicle speed calculated by the output of the rotational sensors 1 exceeds the predetermined value. This constitution allows an existing automatic slip preventing device to have the maximum speed limit function without providing a separate maximum speed limit device.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic slip prevention device installed in an automobile. The present invention relates to a device in which an automatic slip prevention device is combined with a maximum speed limiting device.

0002

[Prior Art] Conventionally, this type of automatic slip prevention device detects the rotational speed of a plurality of wheels (driving wheels and non-driving wheels), and a program control circuit takes in the detection outputs and outputs the rotational speeds of the driving wheels and non-driving wheels. By comparing the rotations of the wheels, when an abnormal rotational speed is identified in the rotational speed of the driving wheel, that is, when slipping occurs, a control output is sent to disable the depression of the accelerator pedal and the driving wheel where the slipping occurred. A device that applies the brakes is used.

On the other hand, a maximum speed limiting device is known that automatically detects the vehicle speed and forcibly loosens the accelerator operation when the detected vehicle speed exceeds a set maximum speed. In Australia, it is compulsory to install this type of device in large vehicles, and there is a possibility that it will be compulsory in the near future in Japan as well.

0004

[Problem to be Solved by the Invention] If the maximum speed limit is legislated in this way, a maximum speed limiter must be installed separately in addition to the automatic slip prevention device currently in use. This poses a problem of increasing manufacturing costs.

[0005] The present invention is intended to solve such problems, and an object of the present invention is to provide an automatic slip prevention device that can be combined with a maximum speed limiting function.

[0006]

[Means for Solving the Problems] The present invention provides a plurality of rotation sensors individually provided on a plurality of wheels, a program control circuit that takes in the outputs of the plurality of rotation sensors and sends out a control output, and a program control circuit that receives the outputs of the plurality of rotation sensors and sends out a control output. the program control circuit includes means for detecting and comparing wheel speeds from the outputs of the plurality of rotation sensors; An automatic slip prevention device comprising means for detecting that the rotational speed of the driven wheels has become abnormal compared to the wheel speed of the non-driven wheels, and means for sending out the control output based on the detection output of the detecting means. The control circuit is characterized in that the control circuit includes means for transmitting the control output when the vehicle speed calculated by the means for taking in the outputs of the plurality of rotation sensors and calculating the vehicle speed exceeds a set value.

The means for disabling the depression of the accelerator pedal is performed by mechanical means that limits the range of movement of the load lever.

[0008]

[Operation] The program control circuit receives detection outputs from rotation sensors installed individually on multiple wheels and calculates the vehicle speed.
When the calculated vehicle speed exceeds a predetermined set value, a control output is sent out to disable depression of the accelerator pedal.

[0009] This allows the existing automatic slip prevention device to have a maximum speed limiting function without separately installing a maximum speed limiting device.

0010

Embodiments Next, embodiments of the present invention will be explained based on the drawings.

FIG. 1 is a diagram showing the configuration of an embodiment of the present invention.

The embodiment of the present invention includes a plurality of rotation sensors 1 individually provided on a plurality of wheels, a program control circuit 2 that takes in the outputs of the plurality of rotation sensors 1 and sends out control outputs, and The program control circuit 2 includes means for calculating the vehicle speed from the outputs of the plurality of rotation sensors 1, and a means for disabling the depression of the accelerator pedal 3 according to the calculated vehicle speed. The program control circuit 2 includes means for detecting that the rotation speed has reached an abnormal rotation speed, and means for transmitting a control output based on the detected output of the detecting means. It includes means for sending a control output when the vehicle speed calculated by the means exceeds a set value.

The means for disabling the depression of the accelerator pedal 3 is an air tank 4 controlled by a program control circuit 2.
a solenoid valve 5 that opens and closes an air passage from the solenoid valve 5;
an air cylinder 6 that moves a piston 6a by air pressure supplied through the piston 6; a link 7 whose central portion is rotatably connected to the tip of the piston 6a; It is composed of a freely connected rod 8 and a load lever 10 that is rotatably connected to the rod 8 and increases or decreases fuel injection from the injection pump 9.

An accelerator cable 1 is connected to the other end of the link 7.
1 is connected to one end, and the other end is connected to a link 12, which is connected to an accelerator pedal 3 via this link 12.

Next, the operation of the embodiment of the present invention constructed as described above will be explained.

First, the normal operation of pressing the accelerator pedal 3 will be explained. When the accelerator pedal 3 is depressed for acceleration, the link 12 connects to the accelerator cable 1.
1, link 7, and rod 8 to move the load lever 10 of the injection pump 9 in the direction of increasing fuel. This increases the amount of fuel supplied to the injection pump 9 and accelerates the vehicle.

When the pedal is released, the accelerator pedal 3
is returned by a spring (not shown), and the link 12, accelerator cable 11, link 7, rod 8, and load lever 10 of the injection pump 9 are returned accordingly, reducing the fuel supply to the injection pump 9.

When the accelerator pedal 3 is operated during normal driving, the piston 6a in the air cylinder 6 is fixed at its original position.

Next, the operation when the vehicle speed exceeds a set value, which is a feature of the present invention, will be explained. FIG. 2 is a flowchart showing the flow of processing operations of the program control circuit according to the embodiment of the present invention.

The program control circuit 2 takes in the detection output from each rotation sensor 1 provided individually for each wheel, and calculates the vehicle speed based on this detection output. It is determined whether the calculated vehicle speed exceeds a predetermined set value, and if it does not exceed the set value, control is returned to the original state.

When the set value is exceeded, a control output is sent to the solenoid valve 5 to open it, and air from the air tank 4 is supplied to the air cylinder 6. This supply of air causes the piston 6a to move in the direction shown by the dashed arrow in FIG.
Move the link 7 to the position indicated by the two-dot chain line.

As the link 7 moves, the load lever 10 connected to the rod 8 also moves to the position indicated by the two-dot chain line, thereby reducing the fuel injection amount. Even if the accelerator pedal 3 is depressed in such a state, the position of the fulcrum around which the link 7 rotates also moves, so the fuel injection amount is not increased and the traveling speed of the vehicle is reduced.

The program control circuit 2 receives the detected output of the decelerated vehicle speed from the rotation sensor 1, calculates the vehicle speed based on the detected output, confirms that the calculated vehicle speed is less than the set value, and then starts the electromagnetic A control output is sent to valve 5.

The solenoid valve 5 closes the air passage by its control output and stops the supply of air to the air cylinder 6.
The air in the air cylinder 6 is exhausted. As this air is discharged, the piston 6a is returned to its original position by the spring 6b, thereby fixing the link 7 in its normal operating position.

Although the above control has been described using an air cylinder, an electric device may also be used.

[0026]

Effects of the Invention As explained above, according to the present invention, when the calculated vehicle speed exceeds a set value, depression of the accelerator pedal is automatically disabled, thereby imposing a maximum speed limit on the automatic slip prevention device. It can have the function of
This eliminates the need for a separate maximum speed limiting device, which has the effect of suppressing cost increases.

The device of the present invention eliminates the need to provide a maximum speed limiter as a separate piece of hardware, and can be applied by changing the software of the conventional automatic slip prevention device, so the economic effect is low. Extremely large.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the configuration of an embodiment of the present invention.

FIG. 2 is a flowchart showing the flow of processing operations of the program control circuit in the embodiment of the present invention.

[Explanation of symbols]

1 Rotation sensor 2 Program control circuit 3 Accelerator pedal 4 Air tank 5 Solenoid valve 6 Air cylinder 6a Piston 6b Spring 7, 12 Link 8 Rod 9 Injection pump 10 Load lever 11 Accelerator cable

Claims (2)

[Claims] Claim 1: A plurality of rotation sensors individually provided on a plurality of wheels, a program control circuit that takes in the outputs of the plurality of rotation sensors and sends out a control output, and disables depression of the accelerator pedal according to the control output. The program control circuit includes means for calculating a vehicle speed from the outputs of the plurality of rotation sensors, and a means for calculating a vehicle speed from the outputs of the plurality of rotation sensors, and a means for calculating a vehicle speed from the outputs of the plurality of rotation sensors, and a means for calculating a vehicle speed from the outputs of the plurality of rotation sensors. In an automatic slip prevention device including a detecting means and a means for sending the control output based on the detection output of the detecting means, the control circuit is configured to detect when the vehicle speed calculated by the calculating means exceeds a set value. An automatic slip prevention device with a maximum speed limit, comprising means for sending out the control output to. 2. The automatic slip prevention device with maximum speed limitation according to claim 1, wherein the means for disabling depression of the accelerator pedal includes mechanical means for limiting the movable range of the load lever.