DE4141088C2 - Portable demonstration device for ABS functions (ABS = anti-lock braking system) - Google Patents

Description

The invention relates to a portable demonstration direction for ABS functions (ABS = anti-lock braking system) according to the preamble of claim 1.

Motor vehicles, especially passenger cars, buses, Trucks and trailers are increasingly being Blocking systems equipped. For trucks and There is even a legal trailer depending on the weight Demand for this. Anti-lock braking systems have it Task, mainly blocking the vehicle wheels smooth road as a result of too vigorous actuation of the  Prevent service brake. This should also help Full braking cornering forces on braked wheels are preserved to ensure driving stability and steerability to guarantee. At the same time, the exploitation of the available brake force connection between the tires and the road and thus the vehicle deceleration and the Braking distance can be optimized.

Together with anti-lock braking systems are also common Anti-slip regulations built in, which serve one Spinning driven wheels on a smooth road due to excessive drive power. Therefore the components of the anti-lock braking system can be used exploit.

From that for the development, installation, testing, the Maintenance, repair and distribution of such Systems responsible group of people will have a precise knowledge the structure and operation of the systems reaches. There is also a need to build and the functioning of anti-lock braking systems and anti Slip regulations also in vocational training institutions, Mediate driving schools, transport companies and freight forwarders to be able to.  

DE-OS 33 46 956 is a device for demonstration the effect of the braking device of a wheeled vehicle known. The known device comprises a demonstration board, on the four wheel center separately next to each other are rotatably mounted on parallel axes. Each A disc brake is assigned to the wheel body, the Brake levers each connected to a brake controller is. There is also a drive shaft on each wheel body at, their investment power to adjust a slip is variable. The drive shafts are common Drive device driven.

A speed measuring device is assigned to each wheel body, those from a pulse generator attached to the wheel body in the form of a magnet wheel and a fixed one Sensor exists. The sensors influence via regulators the brake levers.

This known device is required because of the Space requirements for the four wheel centers large and bulky is also due to the variety of items available the drive device and the brake system heavy and expensive. It is therefore not for widespread use suitable.

The invention has for its object a portable Demonstration device for ABS functions (ABS = anti Blocking system) to create a clear and realistic demonstration and testing of all ABS functions and the associated components and inexpensive and easy to manufacture as well as easy to handle and with a small space gets along.

This object is achieved by the features of claim 1 solved.

In the demonstration device according to the invention in other words, all the components required for the demonstration arranged on the base plate. This also applies to the Magnetic wheels, which in the previous models on the Wheels or brake drums are arranged.

By restricting the rotatable elements to the magnet wheels, their formation with the same radius and the parallel Arrangement in a horizontal position with a distance above one another the pole wheels with the other components accommodate in a confined space. That of both pole wheels required area is the area of a individual pole wheel limited. The magnet wheels can, if necessary  coupled with simple means to for establish a synchronism in one of the possible operating cases. The rotary movements of the magnet wheels can therefore observed simultaneously and synchronous or asynchronous Rotational movements are perceived better. Furthermore the function displays can also be viewed in the same field arrange so that the causes and effects of the ABS Functions can be grasped at a glance.

There is also the possibility of several Assign speed sensor units to the same pole wheel in order to show the ABS functions on several vehicle axles, but without more than the minimum number of two To have to use magnet wheels.

The electronic control unit can be used for demonstration ASR functions (ASR = anti-slip control) additionally for evaluating signals from the speed sensor units be formed, which with different acceleration of the magnet wheels occur.  

According to a further development, at least the magnet wheels, the speed sensors or the speed sensor units and the electronic control unit by appropriate Ori Original parts of a conventional ABS system or ASR system formed and connected to each other. In addition, too the control valve unit with appropriate original parts in the form of solenoid control valves or ABS relay valves a conventional ABS system or ASR system be arranged interchangeably.  

This makes the demonstration device very flexible and allows for further developments or mechanical Changes to the components of an ABS or ASR system if necessary, also install these components and the training people familiar with these components close. It also opens up for the demonstrations device another interesting area of application. In this way, suspect components of an ABS or ASR system of a vehicle removed and against the compo elements of the demonstration device temporarily out be exchanged. By checking the functions with the then suspect components can be clearly identified determine whether these are still functional or Not. In this way, the error can be done without elaborate test facilities from a specialist workshop teln.

Alternatively, the control valve unit can also be equipped with a Simultaneous electronic circuit, which the Functions of the control valve unit of a conventional one ABS control valve unit simulated.

The space of the demonstration device can be so reduce even further and control the control valves  Display the optical unit. This also applies to one Control valve unit with several control valves a spec More localization possible than is the case with original parts that would be when responding by pulling the relay would just give a "click".

In a practical configuration after a first Alternatives are the pole wheels via one of the two pole wheels penetrating and removable pin with connectable to each other.

The pole wheels can be operated by hand without additional drive set in rotation or slowed down, it is ensured that for the operating case, at which requires synchronous running of the two pole wheels is, this also inevitably through this synchronous operation  to lead.

In another alternative, the magnet wheels are through a motor drive via couplings with the same and different speeds can be driven.

In this variant, a realistic one can be Accelerate with high or low acceleration carry out the same as braking with a large or little delay. In addition, at Kon Maintaining the speed synchronous after some time run the pole wheels, so that this operating case is detectable.

A further training provides that the warning light an ABS blink code can be displayed.

Such a blink code is generated by the ABS system if there is or has been a malfunction. By Decoding the blink code can be the possible cause determine and if necessary the defective component loka lize. With the help of the demonstration according to the invention device can simu all possible causes of errors and the corresponding ABS blink code is generated become. When training workshop personnel  this demonstration is a valuable addition to the written maintenance documents in the corresponding relevant manuals.

In addition, a connection unit for connection featured with a conventional ABS diagnostic controller to be seen.

This connection unit can then be used to automatically evaluate the ABS blink code so that the correspondingly signaled errors on a display Direction of the ABS diagnostic controller in plain text seem to be. This gives you the opportunity to Check and identify the ABS blink code others to handle the diagnostic controller to demonstrate.

In a practical embodiment of the invention comprises the function display different colored function light ten, which the pressure build-up, pressure reduction and the Visually maintaining pressure in the brake cylinders in ABS mode signal.

This makes it easier to get an overview of demonstrations, if observes and simultaneously the rotational movements of the pole wheels  the tax levied by the ABS system as a result signals should be perceived. Especially with observers The control of several brake cylinders is this Measure very helpful.

It is also provided that the ASR function display Functional lights, which control the Brake cylinder of a motor vehicle optically in ASR mode signal.

Enable in the case of demonstration of ASR functions these functional lights differ from ABS operation display, which also contributes to clarity wearing.

In addition, it can be provided that the function display includes another ASR function light, which the An control of a motor control of the motor vehicle in the ASR Operation optically signaled.

This is another operating case which differs from the aforementioned operation at ASR radio differentiated and for this purpose through under different functional lights for a better overview is shown for the sake of  

The speed sensor units are preferably uniform distributed around the circumference of the two pole wheels and for each speed sensor unit is a solenoid control valve or ABS relay valve or an electronic simultaneous scarf tion provided.

The demonstration device comes as a result of this measure with only 2 pole wheels, without the De monstration limited to only one vehicle axis would. Rather, the arrangement of the Speed sensor units for each axis one speed sensor can be provided. By the made mutual interference is avoided.

Even when checking the components of an ABS or ASR system, this measure is useful because at the same time all components temporarily against the original Components of the demonstration device replaced can be and a common review possible becomes.

Accordingly, one is used to demonstrate the ABS system two-axle motor vehicle provided an embodiment, where the two speed sensors at a mutual angle of  180 ° apart on the circumference of the two pole wheels are.

For an embodiment of an ABS system at a triaxial trailers are three speed axles sensor units at a mutual angle of 120 ° each stood on the circumference of the two pole wheels.

A practical embodiment provides that the Demon strationsvorrichtung arranged within a housing is.

The housing can be a lockable case be educated.

The housing enables the demonstration device to protect during transport, so that they are, for example, in Trunk of a car can be transported. At a It is designed as a lockable suitcase furthermore, they can be transported as a piece of luggage easy to use and only for short-term shots use or demonstration purposes.

Further developments and advantageous refinements of the Er invention result from the further description  writing and the drawing, as with the execution example games is explained.

The drawing shows:

Fig. 1 is a block diagram of the erfindungsge MAESSEN demonstration device,

Fig. 2 is a perspective view of a demonstration device according to the invention for demonstrating ABS functions in a trailer, and

Fig. 3 is a perspective view of a demonstration device according to the invention for demonstrating ABS and ASR functions in a Motorwa conditions (car, bus, truck).

Fig. 1 shows a block diagram of the Demonstrationsvor direction. Two pole wheels 12 and 14 are rotatably mounted on a base plate 10 and speed sensor units 16 , 18 and 20 are assigned to these pole wheels 12 and 14 . Each speed sensor unit 16 , 18 , 20 comprises speed sensors 26 and 28 each for the upper magnet wheel 12 and lower magnet wheel 14 . The speed sensors 26 and 28 are electrically connected to an electronic control unit 30 .

The electronic control unit 30 is supplied by means of an external voltage source 88 via a power supply connection 36 . Commissioning is carried out by a switch 74 and the operating state is indicated by a signal lamp 76 .

At the output of the electronic control unit 30 there is a function display in the form of a warning light 34 and a simultaneous connection 68 with function lights 42 , 44 , 46 , 48 , 50 , 52 , 58 , 60 and 62 . The function lights 42 to 60 visually signal the pressure build-up, pressure reduction and pressure maintenance in the brake cylinders. The function lamp 62 symbolizes an engine control for the motor vehicle. In addition, a connection unit 40 is also provided, via which an ABS diagnosis controller 70 can be connected.

The pole wheels 12 and 14 are parallel and horizontally spaced one above the other. They have the same radius. A coupling possibility is given by a two pole wheels 12 and 14 penetrating and removable pin 38 , which in the removed state can also be inserted into a hole 90 of the pole wheels 12 and 14 for storage.

Another coupling option is through a clutch 66 , the z. B. can be designed as a magnetic coupling or as a felt disc. Furthermore, a motor drive 64 is also provided, which is controlled via a speed controller 78 for simulating accelerations and decelerations.

With a demonstration device according to FIG. 1, both ABS punctures and ASR functions can be demonstrated. With the ABS functions it is assumed that the ABS system of a three-axle trailer is simulated. For a motor vehicle, it would be possible to arrange another pair of functional lights so that the effect on the brake cylinders of all four wheels can be optically signaled.

Fig. 2 shows a perspective view of the built-in a suitcase 72 Demonstration device. In the difference from the illustration according to FIG. 1, there is no simultaneous circuit 68 here, but rather a control valve unit 32 comprising three magnetic control valves, which are original parts of an ABS system. Also in the electronic control unit 30 , the magnet wheels 12 and 14 and the speed sensor units 16 , 18 , 20 with the speed sensors 26 and 28 are original parts. The demon strationsvorrichtung as shown in Fig. 2 is designed for the demonstration of ABS functions in a three-axle trailer.

Fig. 3 shows a demonstration device, likewise in a perspective view, without the housing 72, to demonstrate the ABS and ASR functions functions in a motor car. Instead of the control valve unit 32 , a simultaneous connection is provided, of which the individual function lights 42 , 44 , 46 , 48 , 50 , 52 , 54 , 56 , 58 , 60 and 62 are shown. The arrangement is made on the base plate 10 approximately as the brake cylinders are assigned to the wheels of the motor vehicle. In ABS operation, the function lights signal the pressure build-up, pressure reduction and pressure maintenance in the brake cylinders.

Function lights 58 and 60 are also shown on the rear axle for ASR operation. The function light 62 optically indicates a motor control as it is also carried out during ASR operation under certain operating conditions. In the right part of the base plate 10 there is the connection unit 40 for connection to an ABS diagnostic controller, a switch 82 for switching off the ASR operation, a switch 84 for switching off the ABS operation, an additional ASR function light 80 , a flywheel motor switch 86 and a speed controller 78 .

Below is the application of the demonstration device some examples.

After connecting to a voltage source and switching on the device by means of the switch 74 , the operating light 76 and the warning light 34 first light up. A functional check is now carried out by means of the electronic control unit 30 and if the latter has not detected any malfunctions in the system, the warning light 34 remains on continuously. In the other case, a blink code is given, which allows conclusions to be drawn about the type and location of the fault. This flashing code can be read and identified once on the basis of descriptions in corresponding manuals, but there is also the possibility of connecting an ABS diagnostic controller 70 via a connection unit 40 and displaying the fault in plain text.

It is now assumed that in the device according to FIG. 2 the pin 38 couples the two pole wheels 12 and 14 to one another. If the pole wheels 12 and 14 are now rotated by hand, the warning light 34 goes out. By quickly braking the magnet wheels 12 and 14 NEN ABS functions can be triggered, which lead to an audible tightening of the solenoid control valves of the control valve unit 32 in the device according to FIG. 2.

Another demonstration option is that the pin 38 is pulled out and the magnet wheels are rotated at un different speeds. In this case too, the solenoid control valves in the control valve unit 32 respond.

While all the solenoid control valves of the control valve unit 32 are addressed simultaneously in the structure shown in FIG. 2, individual components can be tested in that one or both speed sensors 26 and 28 of one or more speed sensor units 16 , 18 and 20 are pulled out, so that a correspondingly Failure of the ABS system on the relevant axis can be simulated.

It is also possible to suspect components an ABS system against that in the demonstration device installed components and so after each other or at the same time their function check.

In the demonstration device shown in FIG. 3, the ABS functions can be demonstrated in a similar manner to that described in connection with FIG. 2. Here, however, there is still the possibility of demonstrating ASR functions.

The pole wheels 12 and 14 can be set in rotation by means of the motor drive 64 , the acceleration and deceleration being adjustable by means of the speed controller 78 . The pole wheels 12 and 14 are connected here by a clutch 66 which, at high accelerations of the one driven pole wheel 14, allows slip between this and the other pole wheel 12 taken along.

With a gradual acceleration or deceleration of the motor drive 64 , the magnet wheels 12 and 14 run synchronously. In this case, neither the ABS system nor the ASR system interferes with the operation.

A strong deceleration of the motor drive 64 leads to the fact that the driven magnet wheel 14 is also strongly decelerated, while the driven magnet wheel 12 will still keep the original speed due to its inertia and slip through the clutch 66 . Accordingly, the circuit and arrangement of the speed sensors 26 and 28 in the speed sensor units 22 and 24 , this can simulate a different speed of the front and rear axles or a different speed of the wheels located on one axle. The ABS system then responds and leads to the function lights associated with the strongly delayed pole wheel 14 for optical signaling of a pressure reduction in the brake cylinder alleviate.

The ASR operation can be represented by a strong acceleration of the pole wheel 14 is effected with the help of the motor drive 64 , so that it is rotated faster than the pole wheel 12th Depending on the arrangement and switching of the speed sensors 26 and 28 in the speed sensor units 22 and 24, this corresponds either to a spinning of both wheels of the driven axle relative to the non-driven axle or to different speeds of the wheels of a driven axle. In the first case, the function lamp 62 is triggered for the motor control, which in practice corresponds to a compulsory reduction of the engine power, in the second case one of the function lamps 58 or 60 is activated, which corresponds to a braking of the faster rotating wheel of the driven axis.

In order to demonstrate either only the ABS functions or only the ASR functions, the ASR function can be switched off with the switch 82 and the ABS function with the switch 84 .

Claims (17)

1. Portable demonstration device for ABS functions (ABS = anti-lock braking system) with a base plate ( 10 ) on which at least two pole wheels ( 12, 14 ) can be rotated with at least one assigned speed sensor unit ( 16, 18, 20, 22, 24 ) with a speed sensor ( 26, 28 ) for each pole wheel ( 12; 14 ) and control elements controlled by the speed sensor units ( 16, 18, 20, 22, 24 ), the pole wheels ( 12, 14 ) being rotatable together and for the demonstration of ABS functions can be delayed, characterized in that the control element comprises an electronic control unit ( 30 ) and a control valve unit ( 32 ) controlled by the electronic control unit ( 30 ), that on the base plate ( 10 ) there is also a function of a Functional test of the electronic control unit ( 30 ) controlled function display in the form of a warning light ( 34 ) and a power supply connection ( 36 ) for feeding the electronic control unit ( 30 ) are arranged such that at least the electronic control unit ( 30 ) and / or the speed sensors ( 26, 28 ) and / or the magnet wheels ( 12, 14 ) are arranged interchangeably on the base plate ( 10 ) and that the two magnet wheels ( 12, 14 ) are arranged in parallel in a horizontal position at a distance from one another, have the same radius and can be directly coupled or uncoupled. 2. Demonstration device according to claim 1, characterized in that the electronic control unit ( 30 ) for demonstrating ASR functions (ASR = anti-slip control) in addition to evaluating signals from the speed sensor units ( 16, 18, 20, 22, 24 ) is formed, which occur with different acceleration of the magnet wheels ( 12, 14 ). 3. Demonstration device according to claim 1 or 2, characterized in that at least the pole wheels ( 12, 14 ), the speed sensors ( 26, 28 ) or the speed sensor unit ( 16, 18, 20, 22, 24 ) and the electronic control unit ( 30 ) are formed by original parts of a conventional ABS system or ASR system and are interconnected. 4. Demonstration device according to claim 3, characterized in that the control valve unit ( 32 ) is formed by original parts in the form of magnetic control valves or ABS relay valves of a conventional ABS system or ASR system, which are arranged interchangeably. 5. Demonstration device according to claim 1 or 2, characterized in that the control valve unit ( 32 ) is formed by an electronic simultaneous circuit ( 68 ) which the functions of the control valve unit ( 32 ) of a conventional ABS control valve unit by switching on the respective functions associated function lights ( 42, 44, 46, 48, 50, 52, 58, 60 ). 6. Demonstration device according to one of claims 1 to 5, characterized in that the pole wheels ( 12, 14 ) via a two pole wheels ( 12, 14 ) penetrating and removable pin ( 38 ) can be forcibly coupled. 7. Demonstration device according to one of claims 1 to 5, characterized in that the pole wheels ( 12, 14 ) by a motor drive ( 64 ) via clutches ( 66 ) can be driven at the same and different speeds. 8. Demonstration device according to one of claims 1 to 7, characterized in that an ABS flashing code can be displayed via the warning light ( 34 ). 9. Demonstration device according to one of claims 1 to 7, characterized in that a connection unit ( 40 ) for connection to a conventional ABS diagnostic controller ( 70 ) is provided. 10. Demonstration device according to one of claims 1 to 9, characterized in that the simultaneous circuit ( 68 ) comprises differently colored functional lights ( 42, 44, 46, 48, 50, 52, 54, 56 ) which in, the pressure build-up, pressure reduction and pressure maintenance visually signal the brake cylinders in ABS mode. 11. Demonstration device according to one of claims 1 to 10, characterized in that the simultaneous connection ( 68 ) ASR function lights ( 58, 60 ) which optically signal the control of the brake cylinder of a motor vehicle in ASR operation. 12. Demonstration device according to claim 11, characterized in that the simultaneous connection ( 68 ) comprises a further ASR function light ( 62 ) which optically signals the activation of a motor control of the motor vehicle in the ASR operation. 13. Demonstration device according to one of claims 1 to 12, characterized in that the speed sensor units ( 16, 18, 20, 22, 24 ) are evenly distributed on the circumference of the two pole wheels ( 12, 14 ) and that for each speed sensor unit ( 16, 18, 20, 22, 24 ) a magnetic control valve or ABS relay valve of the control valve unit ( 32 ) or an electronic simultaneous connection ( 68 ) is provided. 14. Demonstration device according to one of claims 1 to 13, characterized in that two speed sensor units ( 22, 24 ) are arranged at a mutual angle of 180 ° at a distance on the circumference of the two pole wheels, and that the control valve unit ( 32 ) has two solenoid control valves or ABS Relay valves included. 15. Demonstration device according to one of claims 1 to 13, characterized in that three speed sensor units ( 16, 18, 20 ) are arranged at a mutual angle of 120 ° at a distance on the circumference of the two pole wheels, and that the control valve unit ( 32 ) has three solenoid control valves or ABS relay valves. 16. Demonstration device according to one of claims 1 to 15, characterized in that it is arranged within a housing ( 72 ). 17. Demonstration device according to claim 16, characterized in that the housing ( 72 ) is designed as a lockable case.