JPH0976892A - Detector in anti-skid brake controller for trailer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a defective action of an information module and breakage of its respective elements due to overcurrent in an anti-skid brake electronic controller for a trailer. SOLUTION: When an electric current flowing from a terminal (a) to a terminal (d) is increased to the predetermined value, TR5 is turned on because of a raised potential difference between points D, E, and the potential of a point B is lowered to the value of the point E substantially. In this way, an electric current flowing in both resistors R4, R5 is reduced, so that the potential of the point D is lowered, and the TR5 is tuned off. Then, an electric current flows from the terminal (a) to the terminal (d) via resistors R2, TR6, R4, R5, so that the TR6 is turned on, and an initial condition is restored. For this procedure is repeated, the flowing electric current is kept at the predetermined value. Therefore, no excessive electric current flows in the element in an information module 39, and the element in the information module 39 is protected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-skid brake control device for an articulated vehicle, and more particularly to detection of a trailer anti-skid brake control device for detecting whether or not the trailer is equipped with a trailer anti-skid brake control device. It relates to the device.

[0002]

2. Description of the Related Art In general, anti-skid brake control (hereinafter, also referred to as ABS control) loosens the braking force of a wheel to cancel the skid state after detecting that the wheel is in a skid state during braking. By increasing the braking force again, the control of the vehicle is stabilized and the braking control is performed so that the braking distance is as short as possible.

By the way, in a combined vehicle in which a trailer is connected to a tractor, an ABS device for a tractor is conventionally mounted on a tractor, and an anti-skid brake control device for a trailer is mounted on the trailer. The tractor and trailer are individually AB
S control is performed. As an ABS control device for such a tractor / trailer, Japanese Patent Laid-Open No. 4-63758
There is an ABS control device disclosed in the publication.

FIG. 5 is a schematic diagram showing the ABS control device of the tractor-trailer disclosed in this publication, and FIG. 6 is a diagram showing the electrical wiring of the ABS control device of the tractor-trailer. In FIG. 5, the solid line shows the connection of the pneumatic circuit, and the broken line shows the electrical connection.

As shown in FIG. 5, a vehicle 1 is a connected vehicle in which a semi-trailer 3 is connected to a tractor 2. The tractor 2 and the trailer 3 are respectively provided with a tractor A.
A BS controller 4 and a trailer ABS controller 5 are provided.

The tractor ABS control device 4 supplies brake actuators 8 and 9 consisting of a power chamber (air chamber) for mechanically braking the left and right front wheels 6 and 7, and a brake valve (not shown) to these actuators 8 and 9. The modulator 10 for adjusting the brake operating pressure (air pressure), the brake actuator 12 including a spring brake chamber for mechanically braking the left rear wheel 11, and the brake operating pressure (air pressure) of the actuator 12 A modulator 13 for adjusting, a brake actuator 15 composed of a spring brake chamber for mechanically braking the right rear wheel 14, a modulator 16 for adjusting a brake operating pressure (air pressure) of the actuator 15, and each modulator 10, 13,1
A tractor ABS controller (ECU) 17 that is electrically connected to and controls the 6 and a speed sensor 18, 19, 20, 21 that detects the rotational speed of each wheel and sends it to the tractor ABS controller 17. I have it.

On the other hand, the ABS controller 5 for the trailer 3 is
Brake actuators 24a and 24b, which are power chambers (air chambers) that mechanically brake the pair of left wheels 22 and 23, and these actuators 24
a modulator 24 for adjusting the brake operating pressure (air pressure) of a and 24b, brake actuators 28a and 28b composed of power chambers for mechanically braking the pair of right wheels 26 and 27, and the actuators 28a and 2b.
The modulator 29 that adjusts the brake operating pressure (air pressure) of 8b, the ABS controller (ECU) 30 for the trailer that is electrically connected to and controls the modulators 25 and 29, and the rotation of the wheels 22 and 26, respectively. It is provided with speed sensors 31 and 32 that detect the speed and send it to the trailer ABS controller 30.

As shown in FIG. 6, on the tractor 2 side, the modulators 10, 13, 16 and the speed sensors 18 to 21 are connected to the tractor ABS controller 17, as described above. A brake lamp 33 of the tractor 2, a relay 34 of the brake lamp 33, and a brake switch 35 including a pressure switch of a brake valve are provided, and the brake lamp 33 is connected to the tractor ABS controller 17. The brake switch 35 may be a brake pedal switch.

Further, on the tractor 2 side, there is an information lamp 36 for indicating the trailer connection and an AB for tractor.
Failure display lamp 37 of S control device 4 and trailer A
A failure display lamp 38 of the BS controller 5 is provided.

On the other hand, also on the trailer 3 side, as described above, the modulators 25, 29 and the speed sensors 31,
32 is connected to the trailer ABS controller 30. Further, a braking lamp 40 for the trailer 3 is provided. The braking lamp 40 is connected to the trailer ABS controller 30 and also to the relay 34 via a trailer connecting connector 41.

The electrical wiring of the tractor ABS control device 4 and the electrical wiring of the trailer ABS control device 5 are connected via an ABS control connector 42. Therefore, the failure display lamp 38 and the trailer information module 39 are connected to the trailer ABS controller 30 via the connector 42.

Further, as shown in FIG. 7, the information module 39 includes a transistor TR1 for controlling turning on and off of the information lamp 36, a transistor TR2 for controlling ON / OFF of the transistor TR1, and a connector 42 for ABS control. Transistor TR3 whose on / off is controlled by connecting / disconnecting the switch and turning on / off of the ignition switch 43.
And a transistor TR4 whose ON / OFF is controlled by ON / OFF of the transistor TR3, connection / non-connection of the trailer connecting connector 41, and ON / OFF of the brake switch 35. The terminals a, b, c, d of the information module 39 in FIG.
e, f, g correspond to the terminals a, b, c, d, e, f, g of the information module 39 in FIG. 6, respectively. In that case, the terminal a is a power supply connection terminal connected to the power supply of the tractor, and the terminal d is the trailer ABS ECU.
The terminal g is a ground terminal.

Next, since the electric wiring diagram shown in FIG. 6 is complicated, the connection detection of the trailer 3 by the information module 39 and the trailer 3 are detected by the information module 39 with reference to FIGS. The connection detection of the ABS control device 5 will be described.

7 and 8, when the brake switch 35 is turned on when the brake pedal of the tractor 2 is depressed (in FIGS. 6 and 7, the relay 34 is switched from the terminal e of the information module 39 to the terminal c). If the connector 41 is connected, the voltage V _{1 at} the terminal c of the information module 39 changes, so whether the trailer braking lamp 40 is connected by detecting the change in the voltage V ₁ . Whether or not is detected. In other words, it is detected whether the trailer 3 is connected. Further, by detecting the voltage V ₂ or current at the terminal d of the information module 39 connected to the trailer ABS control connector 42, it is detected whether or not the trailer ABS controller 30 is connected. In other words, it is detected whether or not the trailer ABS control device 5 is connected.

The operation of the information module 39 will be specifically described. (1) When all the transistors TR1 to TR4 are in the off state and the ignition switch 43 is turned on When all the transistors TR1 to TR4 are in the off state and the ignition switch 43 is turned on, a current is supplied to the terminal b of the information module 39 and the transistor. T
It flows to terminal g through R2 and transistor TR1. As a result, both the transistors TR2 and TR1 are turned on, so that the current flows in the information lamp 3
6, the terminal f and the transistor TR1 flow to the terminal g, and the information lamp 36 is turned on.

(2) When the tractor having the ABS control device is a single vehicle (when the trailer is not connected) Since the connector 42 is not connected, the current flows from the terminal a to the terminal d even when the ignition switch 43 is turned on. Absent. Also, since the connector 41 is not connected,
Relay 3 whose current is activated by the brake switch 35
4, through the terminal e and the transistor TR4 to the terminal g, and the transistor TR4 is turned on. As a result, a current flows to the terminal g through the terminal b and the transistor TR4, so that the transistor TR2 is turned off and the transistor TR1 is also turned off. Therefore, the information lamp 36 is turned off.

(3) A for a tractor having an ABS control device
Since the connector 42 is connected when the trailer having the BS controller is connected, when the ignition switch 43 is turned on, the trailer ABSEC is passed through the terminal a, the diode D1, the terminal d and the connector 42.
A current flows through U30. This allows ABS for trailers
The power supply of the ECU 30 is secured.

Further, since a current flows through the terminal d, a potential difference is generated on both sides of the resistor R1, so that the transistor TR3 is turned on. As a result, a current flows to the terminal g through the terminal a, the transistor TR3 and the transistor TR4, so that the transistor TR4 is turned on and the information lamp 36 is turned off as in the above (2).

(4) A for a tractor having an ABS control device
When a trailer without a BS control device is connected: Since the trailer ABS ECU 30 is not provided in the trailer, that is, the connector 42 is not connected, a current flows from the terminal a to the terminal d even if the ignition switch 43 is turned on. Absent. However, since the trailer stop lamp 40 is connected via the connector 41, current flows through the relay 34, the terminal e, the diode D2, the terminal c and the connector 41 to the trailer stop lamp 40. At this time, this current is not large enough to turn on the lamp 40, so the lamp 40 does not turn on. Therefore, the current no longer flows from the terminal e to the transistor TR4, and the transistor TR4 is turned off. Therefore, the information lamp 36 remains lit.

As described above, in the conventional tractor-trailer vehicle, the information lamp 36 detects both the connection state of the trailer 3 and the presence or absence of the trailer ABS control device 5 mounted on the trailer.

FIG. 9 shows another conventional example of the information module in the detection device of the trailer ABS control device, corresponding to part P in FIG. In addition,
The same components as those described above are designated by the same reference numerals, and detailed description thereof will be omitted.

In the conventional example shown in FIG. 7, a diode D1, a resistor R1 and a transistor TR3 are used in the P section, but in the conventional example shown in FIG. 9, a transistor TR0, a resistor R2 and a comparator 44 are used. .

In this conventional example, no current flows from the terminal a to the terminal d when the tractor is a single vehicle and when the trailer having no ABS is connected. For this reason, since no potential difference is generated on both sides of the resistor R2, the comparator 44 does not output a signal and no current flows through the transistor TR4. Therefore, turning on / off of the information lamp 36 is determined depending on whether the trailer stop lamp 40 is connected or not. That is, since the trailer stop lamp 40 is not connected when the tractor is a single vehicle, a current flows from the terminal e through the transistor TR4 to the terminal g. Therefore, the transistor TR4 is turned on, and the information lamp 36 is turned off as described above. Further, when the trailer having no ABS is connected, the trailer stop lamp 40 is connected, so that the current flows from the terminal e to the diode D2 and the terminal c.
And trailer stop lamp 4 through connector 41
Flows to zero. At this time, this current is not large enough to turn on the lamp 40, so the lamp 40 does not turn on. Therefore, the current no longer flows from the terminal e to the transistor TR4, and the transistor TR4 is turned off. Therefore, the information lamp 36 remains lit.

When the trailer having the ABS control device is connected, when the ignition switch 43 is turned on, a current flows as shown by the dotted line in FIG. This causes a potential difference between the terminals a and d, so that the transistor TR0 is turned on and a current flows from the terminal a through the transistor TR0 to the terminal d. At the same time, the comparator 44 outputs a signal and the transistor TR4 is turned on. Therefore, the information lamp 36 is turned off as described above.

As described above, also in this conventional example, the information lamp 36 detects both the connection state of the trailer 3 and the presence or absence of the trailer ABS control device 5 mounted on the trailer.

[0026]

However, in any of the above-mentioned conventional detecting devices for the trailer ABS control device, when the trailer having the ABS control device is connected to the tractor, for example, in the trailer ABS control device. This ECU due to a malfunction of ABS ECU 30
As the resistance R of 30 decreases, the current increases and an overcurrent flows as shown in FIG. In addition, an overcurrent may flow due to a GND short-circuit of the power supply wiring of the trailer ABS ECU 30 or an incorrect wiring. When such an overcurrent flows, an overcurrent also flows from the terminal a of the information module 39 to the terminal d. Then, as shown in FIG. 10, when an overcurrent of a certain magnitude or more flows, the information module 39
There is a problem in that elements such as the diode D1 of 1) are destroyed and the information module 39 may malfunction.

The present invention has been made in view of the above problems, and an object thereof is to prevent destruction of each element of the information module due to the above-mentioned overcurrent and prevent malfunction of the information module. It is an object of the present invention to provide a detection device for a trailer anti-skid brake control device.

[0028]

In order to solve the above-mentioned problems, the invention of claim 1 is a tractor equipped with an anti-skid brake control device for a tractor having an anti-skid brake electronic control device for a tractor, and this tractor. And a trailer equipped with a trailer anti-skid brake control device having a trailer anti-skid brake electronic control device connected to the tractor anti-skid brake electronic control device, and the tractor provided with the trailer. Of the tractor to the electronic control unit for the trailer with a power supply connection terminal connected to the power supply of and a control device connection terminal connected to the trailer anti-skid electronic control device, and to the trailer. Anti-skid brake control device for trailer A trailer anti-skid brake control device detecting device including at least an information module for detecting whether or not the trailer anti-skid electronic control device is overloaded. Current limiting means is provided for suppressing a current flowing between the power supply connection terminal of the information module and the control device connection terminal to a predetermined value.

The invention according to claim 2 is further provided with display means which is controlled by the information module and which displays information as to whether or not the trailer anti-skid brake control device is mounted on the trailer. It has a feature.

[0030]

In the present invention having such a structure, when an excessive current flows through the trailer anti-skid electronic control unit for some reason such as a failure of the trailer anti-skid electronic control unit, it is provided in the information module. The current suppressing means suppresses the current flowing between the power supply connection terminal of the information module and the control device connection terminal to a predetermined value. As a result, overcurrent does not flow from the power supply connection terminal of the information module to the control device connection terminal, and each element of the information module is protected. Therefore,
It is possible to reliably prevent the information module from malfunctioning.

[0031]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a view showing a part of an information module in a first embodiment of a detection device for a trailer anti-skid brake control device according to the present invention, and is a view corresponding to a portion Q in FIG. 7. The same components as those in the conventional example described above are designated by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIG. 1, in the first embodiment, a first circuit 45 in which a resistor R3 and a transistor TR5 are arranged in series between the power supply connection terminal a of the information module 39 and the control device connection terminal d. Is connected in parallel with a second circuit 46 in which a transistor TR6 and two resistors R4 and R5 are arranged in series. In that case, the base of the transistor TR5 is connected to the point D between the resistors R4 and R5 of the second circuit 46, and
The base of the transistor TR6 is the resistor R3 of the first circuit 45.
Is connected to a point B between the transistor TR5 and the transistor TR5.
The other configuration of the information module 39 is the same as that shown in FIG. 7, and the description thereof will be omitted. Further, each AB of the tractor and trailer in this first embodiment
The configuration of the S control device and the configuration of the control circuit are the same as those shown in FIGS. 5, 6 and 8, respectively, and the description thereof will be omitted.

In the first embodiment thus constructed, when the tractor is a single vehicle and when the trailer without the ABS control device is connected, it is the same as the case of the conventional example shown in FIG. Is omitted.

When a trailer having an ABS controller is connected, current flows from terminal a through resistor R3, transistor TR6 and both resistors R4 and R5 to terminal d. Then, a potential difference occurs between the point C and the point B between the transistor TR6 and the resistor R4, and the transistor TR6 is turned on. As a result, current flows from the terminal a to the transistor TR.
6. It flows through the resistors R4 and R5 to the terminal d. At this time, since the potential difference between the points D and E is small, the transistor TR5 remains off. Further, since the transistor TR3 is turned on and the transistor TR4 is also turned on due to the potential difference between the points A and E, the information lamp 36 is turned off.

As the current flowing from the terminal a to the terminal d increases due to the abnormality of the trailer ABS ECU 30, the potential difference between the points D and E increases. Then, when this current reaches the predetermined value shown in FIG. 10, the transistor TR5 is turned on due to the potential difference between the points D and E, and the potential at the point B drops to the value at the point E. Therefore, the potential difference between the points B and C becomes small and the transistor TR6 is turned off. As a result, the current flowing through the resistors R4 and R5 becomes small, so that the potential at the point D decreases and the transistor TR5
Will also be off. Then, the current flows from the terminal a through the resistor R3, the transistor TR6, and the resistors R4 and R5 to the terminal d, so that the transistor TR6 is turned on again to return to the initial state. Since this is repeated, the flowing current is maintained at the predetermined value shown by the solid line in FIG. Therefore, an excessive current does not flow through the element of the information module 39, and the element of the information module 39 is protected. Thus, the transistors TR5, TR6 and the resistors R3, R4, R
5 constitutes the current suppressing means of the present invention. In addition,
At this time, the transistor TR3 remains on, so the information lamp 36 remains off.

As described above, even if an excessive current is generated on the trailer side, the current flowing from the terminal a to the terminal d of the information module 39 is suppressed to a predetermined value, so that the element is protected. Therefore, the operation of the information module 39 becomes reliable, and the trailer ABS control device also becomes reliable.

FIG. 2 is a view similar to FIG. 1, showing a part of the information module in the second embodiment of the present invention. The same components as those in the first embodiment and the conventional example described above are designated by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIG. 2, in the second embodiment, a first circuit 45 having a transistor TR7 and a resistor R6 arranged in series between two terminals a and d of the information module 39 and two resistors R7, R8 and transistor TR8 are connected by a parallel circuit with a second circuit 46 arranged in series. In that case, the transistor TR7
Is based on the point F between the resistors R7 and R8 of the second circuit 46.
And the base of the transistor TR8 is connected to a point H between the transistor TR7 and the resistor R6 of the first circuit 45. The other configuration of the information module 39 is the same as that shown in FIG. 7, and the description thereof will be omitted. The configurations of the ABS control devices and the control circuits of the tractor and the trailer in the second embodiment are the same as those shown in FIGS. 5, 6 and 8, respectively, and the description thereof will be omitted.

In the second embodiment constructed in this manner, when the tractor is a single vehicle and when the trailer without the ABS control device is connected, it is the same as the case of the conventional example shown in FIG. Is omitted.

When the trailer having the ABS controller is connected, a current flows from the terminal a to the terminal d through the resistors R7 and R8, the transistor TR8 and the resistor R6. Then, a potential difference occurs between the point G and the point H between the resistor R8 and the transistor TR8, and the transistor TR8 is turned on. This causes a current to flow from the terminal a to the terminal d through the resistors R4 and R5 and the transistor TR8. At this time, since the potential difference between the points A and F is small, the transistor TR7 remains off. Also, points A and E
Since the transistor TR3 is turned on and the transistor TR4 is also turned on due to the potential difference between them, the information lamp 36 is turned off.

As the current flowing from the terminal a to the terminal d increases due to an abnormality in the trailer ABS ECU 30, the potential difference between the points A and F increases, and when the current reaches a predetermined value, the transistor TR7 is turned on and the point TR is turned on. The potential of H becomes almost the same as the potential of point A. Therefore, the potential difference between the points G and H becomes small and the transistor TR8 is turned off.
As a result, the current flowing through the resistors R7 and R8 becomes small, so that the potential difference between the points A and F becomes small and the transistor TR7 is turned off. Then, a current flows from the terminal a through the resistors R7 and R8, the transistor TR8 and the resistor R6 to the terminal d, so that the transistor TR8 turns on and returns to the initial state. Since this is repeated,
The flowing current is maintained at the predetermined value shown in FIG. Therefore, as in the first embodiment described above, an excessive current does not flow through the element of the information module 39, and the element of the information module 39 is protected.
Thus, the transistors TR7, TR8 and the resistors R6, R7, R8 constitute the current suppressing means of the present invention. At this time, since the transistor TR3 remains on, the information lamp 36 remains off.

As described above, also in the second embodiment, even if an excessive current is generated on the trailer side, the element of the information module 39 is protected, so that the operation of the information module 39 is ensured and the trailer ABS is operated.
The control device also operates reliably.

FIG. 3 is a view similar to FIG. 1, showing a part of the information module in the third embodiment of the present invention. The same components as those of the first and second embodiments and the conventional example described above are designated by the same reference numerals, and detailed description thereof will be omitted.

In the first and second embodiments described above, when a large current flows through the trailer ABS control device, a larger current than normal flows into the transistors TR6 and TR8. However, in the third embodiment, the transistor TR9 in the abnormal state is completely turned off so that only the current value in the normal state flows in the transistor TR9. As a result, the transistor TR9 can be made to withstand a normal current.

That is, as shown in FIG. 3, in the third embodiment, between the terminals a and d of the information module 39, the transistor TR9 and the two resistors R9,
R10 is connected by the first circuit 45 arranged in series, and both resistances TR9 and T of the terminal a and the first circuit 45 are connected.
A point R between R10 and a point I is connected by a second circuit 46 in which a resistor R11 and a transistor TR10 are arranged in series. In that case, the base of the transistor TR9 is the second
It is connected to the point J between the resistor R11 of the circuit 46 and the transistor TR10 via the resistor R12, and the base of the transistor TR10 is connected to the point K between the transistor TR9 and the resistor R9 of the first circuit 45. ing.
Further, the point L of the circuit between the base of the transistor TR9 and the resistor R12 and both resistors TR9 and TR10 of the first circuit 45.
A resistor R13 and a transistor TR are provided between the point M and the point M.
11 are connected by a circuit arranged in series. The base of the transistor TR11 is connected to the point N between the resistor R11 of the second circuit 46 and the transistor TR10 via the resistor R14. Further, the point O of the circuit between the transistor TR11 and the resistor R14 and both resistors TR of the first circuit 45
The point P between the 9 and TR10 is connected via a resistor R15.

The other structure of the information module 39 is the same as that shown in FIG. 7, and the description thereof will be omitted. Further, the configurations of the ABS control devices and the control circuits of the tractor and the trailer in the third embodiment are the same as those shown in FIGS. 5, 6 and 8, respectively, and a description thereof will be omitted.

In the third embodiment constructed as described above, when the tractor is a single vehicle and when the trailer without the ABS control device is connected, it is the same as the case of the conventional example shown in FIG. Is omitted.

When the trailer having the ABS controller is connected, the current flows from the terminal a to the resistor R11 and the transistor TR1.
0 and both resistors R9 and R10 to the terminal d.
As a result, the transistor TR10 is turned on, and the current flows from the terminal a to the terminal d through the resistor R11, the transistor TR10, and the resistor R10. At this time,
Since the potential difference between the points A and L is small, the transistor TR9 remains off and the transistor TR11 also remains off. Then, the transistor TR10 is turned on by the potential difference between the points A and E.

As the current flowing through the trailer ABS ECU 30 increases due to an abnormality or the like, the potential difference between points A and N increases, and when the potential difference reaches a predetermined value, the transistor TR9 is turned on. At the same time, the potential difference between points O and P also increases, and the transistor TR
11 is also turned on. Then, the potential of the point K rises and the point A
, The potential difference between the points N and K becomes small, and the transistor TR10 is turned off. At this time, since the transistor TR11 is on, the potential at the point L drops and comes closer to the point M. Therefore, the potential difference between the points A and L is maintained large, and the transistor TR9 remains on. Therefore, the current flows from the terminal a through the transistor TR9 and the resistors R9 and R10 to the terminal d. The current flowing at this time is maintained at a small value because the resistance R9 is set relatively large. Thus, the transistors TR9, TR11 and the resistors R9,
R10, R12, R13, and R14 constitute the current suppressing means of the present invention.

Therefore, as in the first and second embodiments described above, an excessive current does not flow through the element of the information module 39, and the element of the information module 39 is protected. At this time as well, the transistor TR3 remains on, so the information lamp 36 remains off. Thus the third
Even in the embodiment, even if an excessive current is generated on the trailer side,
Since the elements of the information module 39 are protected, the operation of the information module 39 is ensured and the trailer ABS control device is also ensured. Particularly, in the case of the third embodiment, since only the current when the trailer ABS control device is operating normally flows through the transistor TR10,
It is sufficient to use R10 that can withstand the current under normal conditions.

FIG. 4 is a diagram showing a part of the information module according to the fourth embodiment of the present invention and corresponding to the portion P in FIG. The above-mentioned first to third
The same components as those of the embodiment and the conventional example are designated by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIG. 4, in the fourth embodiment, any one of the circuits of the above-described first to third embodiments is provided at a portion corresponding to the Q portion in FIG.
A comparator 44 is provided in place of the resistor R1 and the transistor TR3 in the P section of FIG.

The other structure of the information module 39 is the same as that shown in FIG. 7, and the description thereof will be omitted. The configurations of the ABS control devices for the tractor and the trailer and the configuration of the control circuit in the fourth embodiment are the same as those shown in FIGS. 5, 6 and 8, respectively, and the description thereof will be omitted.

In the thus constructed fourth embodiment, the operation of the tractor alone and the operation of the trailer without the ABS control device are the same as those in the conventional example shown in FIG. Is omitted.

When the trailer having the ABS control device is connected, a predetermined potential difference occurs between the terminals a and d, so that the comparator 44 outputs a signal. With this output signal,
The transistor TR4 is turned on. As a result, the information lamp 36 is turned off as in each of the above-mentioned examples. Thus, it can be seen that the trailer ABS control device is mounted on the trailer connected to the tractor.

The function of preventing the destruction of the elements of the information module 39 due to overcurrent in the fourth embodiment is the same as that of each of the first to third embodiments described above. Is omitted.

[0057]

As is apparent from the above description, according to the detection device of the trailer anti-skid brake control device of the present invention, even if an overcurrent flows in the trailer anti-skid electronic control device, Since the overcurrent does not flow from the power supply connection terminal to the control device connection terminal, each element of the information module can be protected from the overcurrent. Therefore, it is possible to reliably prevent the information module from malfunctioning.

[Brief description of drawings]

1 is a view showing a part of an information module in a first embodiment of a detection device for a trailer anti-skid brake control device according to the present invention, and is a view corresponding to a portion Q in FIG. 7;

FIG. 2 is a view similar to FIG. 1, showing a second embodiment of the present invention.

FIG. 3 is a view similar to FIG. 1, showing a third embodiment of the present invention.

FIG. 4 is a view showing a fourth embodiment of the present invention and corresponding to a portion P in FIG.

FIG. 5 is a diagram schematically showing a conventional anti-skid brake control device for a tractor / trailer.

FIG. 6 is an electrical wiring diagram of the conventional anti-skid brake control device shown in FIG.

7 is an internal electrical wiring diagram of an example of the information module of the electrical wiring diagram shown in FIG.

FIG. 8 is a schematic electric wiring diagram schematically showing the electric wiring diagram shown in FIG.

9 is an internal electrical wiring diagram of another example of the information module of the electrical wiring diagram shown in FIG.

FIG. 10 is a diagram for explaining overcurrent of a conventional information module and current suppression of the information module of the present invention.

[Explanation of Codes] 1 ... Connected vehicle, 2 ... Tractor, 3 ... Trailer, 4 ... Tractor anti-skid brake control device (tractor A
BS controller), 5 ... Trailer anti-skid brake controller (trailer ABS controller), 17 ... Tractor ABS controller (tractor ABS electronic controller), 30 ... Trailer ABS controller, 35 ...
Brake switch, 36 ... Information lamp (display means for displaying information of trailer anti-skid brake control device), 39 ... Trailer information module, 41 ... Trailer connection connector, 42 ... Trailer ABS control device connection connector, 43 ... Ignition Switch, 44 ... Comparator, 45 ... First circuit, 46 ... Second circuit

Claims (2)

[Claims] 1. A tractor equipped with a tractor anti-skid brake electronic control unit having a tractor anti-skid brake electronic control unit, and a trailer connected to the tractor and connected to the tractor anti-skid brake electronic control unit. Equipped with an anti-skid brake control device for a trailer having an electronic anti-skid brake control device for a trailer, a power supply connection terminal provided on the tractor and connected to a power source of the tractor, and connected to the anti-skid electronic control device for the trailer While having the control device connection terminal to supply the power of the tractor to the electronic control unit for the trailer,
A trailer anti-skid brake control device detection device comprising at least an information module for detecting whether or not the trailer anti-skid brake control device is mounted on the trailer, wherein the information module includes a trailer anti-skid brake control device. When excessive current flows to the skid electronic control unit,
A detection device for a trailer anti-skid brake control device, characterized in that current suppressing means for suppressing a current flowing between the power supply connection terminal and the control device connection terminal of the information module to a predetermined value is provided. 2. A display means is provided which is controlled by the information module and which displays information as to whether or not the trailer anti-skid brake control device is mounted on the trailer. A detection device for the anti-skid brake control device for the trailer described.