DE102011108479B4 - Traction aid arrangement and procedure - Google Patents

Abstract

Traction aid arrangement for a motor vehicle, comprising: a) a traction aid device (1) with a rotation chain device (4), which can be adjusted from an idle position (15) to an operating position (16) and back with an adjusting device (5), and a control device (10 ), which is coupled to the adjusting device (5) for controlling the same; and b) a traction monitoring device, the control device (10) being coupled to the traction monitoring device and being designed to receive and process at least one data value of the traction monitoring device which is assigned to a slip or traction of a tire (2) of the motor vehicle, the traction aid arrangement furthermore has a vehicle controller (14) which, together with the control device (10), is designed to process at least one further data value of the vehicle controller (14), the further data value of the vehicle controller (14) being associated with an operating state of the motor vehicle, which is the traction relates directly or indirectly, the adjustment of the traction aid device (1) to the rest position taking place automatically on the basis of the at least one further data value of the vehicle control system (14) by means of the control device (10), characterized in that the adjustment of the traction aid device (1) into the operating position automatically on the basis of the at least one data value of the traction monitoring device by means of the control device (10).

Description

The invention relates to a traction aid arrangement for a motor vehicle according to the preamble of claim 1. The invention also relates to a method for operating a traction aid device and to a start-up assistance device of a motor vehicle.

Traction aid arrangements for motor vehicles are known in different designs. For example, So-called slingshot chains (also called rotation chains) for motor vehicles, in particular commercial vehicles, are used to improve the traction of the tires on smooth surfaces or on the ground, on the road, in ice and snow. These sling chains are mounted near each drive wheel of the motor vehicle and are held in a rest position. In use, the driver of the motor vehicle e.g. pivoted into an operating position by means of pneumatics. In the operating position, a rotary link, on which the sling chains are suspended, is brought into contact with the respective tire and set in rotation by it. The slingshot chains are thrown in front of the tires and come between the tires and the surface to increase friction and traction.

DE 103 52 593 A1 relates to a vehicle motion stabilizing device that reliably controls the start and end of the operation of the frictional force adding device and prevents the repetition of unnecessary operations when braking, accelerating, and changing direction while the vehicle is running effectively by activating the frictional force adding device. The vehicle movement stabilization device is provided with a frictional force adding device for increasing the frictional force of the wheels on the road surface by scattering particles and with a control device. The controller is configured to start the operation of the frictional force adding device when it detects the operation starting conditions based on signals from wheel speed sensors, a hydraulic sensor and a pedal force sensor during braking, and to stop operating when signals are detected that detect the Display the disappearance of the status, thereby preventing the repetition of unnecessary operations.

DE 41 15 367 A1 describes a road vehicle with an anti-aquaplaning system, in particular to improve wheel grip despite the water surface on the road. Agents are released which mechanically displace the water layer, and the agents form a mass jet of gas / liquid or particles or a mixture of at least two of these agents. For the electronic detection of the aquaplaning effect, sensor signals of a temperature sensor for the ambient temperature, a vibration sensor for the chassis of the road vehicle, a vibration sensor for at least one body part that can be influenced by water spraying from the road, a wheel speed sensor and electronic means for signal analysis and evaluation of the sensor signals are used ,

These arrangements have proven their worth. In a dangerous situation in which a driver has to concentrate on steering and mastering his motor vehicle in a matter of seconds, he can not always switch on the slinger chains immediately when slip or traction difficulties arise for the respective tires.

DE 29 14 366 A1 describes an anti-skid device for motor vehicles, in which a friction disc bears against a drive wheel. The disc is provided with chain links, the free ends of which are thrown in between the tire and the ground during operation. The friction disc is supported on one end of an arm which is pivotally mounted at its other end about a pin which is fixedly connected to the vehicle or its spring system. Pneumatic means under the influence of control means in the cab swivel the arm with the disc from a protected rest position to a pneumatically resilient system against the tire. An automatic shutdown of the anti-skid device is also described. The device is automatically swiveled up into the rest position when the speed of the motor vehicle exceeds 25-35 km / h, for example. For this purpose, a switch-off device should be designed in such a way that it cannot be switched on at speeds above the specified limit. The encoder for the shutdown device, which can be of a known valve type, is preferably the speed lock already present on most trucks for low gear.

Starting from this last-described prior art, it is therefore the object of the present invention to provide an improved traction aid arrangement for a motor vehicle.

Another object is to provide an improved method for operating a traction aid arrangement of a motor vehicle.

The objects are achieved by a traction aid arrangement with the features of claim 1 and by a method with the features of claim 8.

The traction aid arrangement has a traction aid device which is automatically removed from the Rest position in the operating position and is adjusted back. This takes place on the basis of at least one data value of a traction monitoring device of the associated motor vehicle.

In this way, an immediate reaction of the traction aid device is possible in a dangerous situation and the driver can concentrate fully on the control of his vehicle.

Accordingly, a traction aid arrangement for a motor vehicle has a traction aid device which can be adjusted from an inoperative position to an operating position and back with an adjusting device, and a traction monitoring device. The traction aid device can be automatically adjusted from the rest position to the operating position and back on the basis of at least one data value of the traction monitoring device. The traction monitoring device generates the at least one data value as a function of a traction of the tires of the motor vehicle.

The traction aid device has a control device which is coupled to the traction monitoring device and is designed to receive the at least one data value. The traction monitoring device generates the at least one data value, which can then be processed by the control device.

The control device is designed to process the at least one data value with the traction monitoring device. You can do this e.g. compare the at least one data value of the traction monitoring device with at least one previously definable reference value. This enables adaptation to different areas of data values.

In the preferred embodiment, the at least one data value of the traction monitoring device is assigned to a slip or a traction of a tire of the motor vehicle and can thus be used directly by the control device to trigger an activation of the traction aid device. If it is determined from the at least one data value of the traction monitoring device that the slip of the drive wheels is too great, the respective traction aid devices can be activated and thus prevent the vehicle from becoming stuck.

In the preferred embodiment, the traction aid arrangement furthermore has a vehicle control which is coupled to the control device. This enables an even more precise evaluation of dangerous situations in which the traction aid arrangement can be used.

For this purpose, the control device is designed to process at least one further data value of the vehicle control and / or to compare the at least one further data value of the vehicle control with at least one previously definable reference value. For example, it is possible that a buckling of a semitrailer is detected, which improves the possibility of stabilization for an ESP by switching on the traction aid device separately on the semitrailer of the semitrailer. For this purpose, the at least one further data value of the vehicle control system is assigned to an operating state of the motor vehicle, which relates directly or indirectly to the traction.

The traction aid device is automatically adjusted to the rest position on the basis of the at least one further data value of the vehicle control by means of the control device.

The traction aid device is automatically adjusted to the operating position on the basis of the at least one data value of the traction monitoring device by means of the control device.

In a further embodiment, the traction aid device has a rotation chain device. This can e.g. Slingshot chains made of steel and / or plastic include. Other traction aid elements are of course also conceivable.

In a still further embodiment, the rotary chain device can have its own rotary drive, which is designed, for example, electrically, pneumatically or hydraulically. This allows the traction aid elements, e.g. Spin chains, even when the tire is stationary, can be thrown in front of or under the respective wheels to provide traction. This is particularly suitable for starting on slopes or off-road.

In a still further embodiment, the traction monitoring device is connected to at least one sensor, which detects a slip or a traction of a tire of the motor vehicle. This means that slip or changed traction can be detected immediately.

In one embodiment, the traction monitoring device is a brake control device or a component of a brake control device. As a result, the data values already present in the brake control device or generated by it can be used. Additional sensors are not necessary, but can be provided as redundancy. If it is determined from the at least one data value of the brake control device or the brake system (for example via ASR) that the slip of the drive wheels is too great, the respective Traction aid devices are switched on and thus prevent the vehicle from jamming.

E.g. in the event of slippery roads (due to ice, snow, water) when braking from the at least one data value of the brake control device that there is insufficient traction, the respective traction aid devices can be activated and thus shorten a braking distance significantly.

1. a) die Traktionshilfevorrichtung mit einer Rotationsketteneinrichtung, die mit einer Verstelleinrichtung aus einer Ruhestellung in eine Betriebsstellung und zurück verstellbar ist, und eine Steuereinrichtung, die mit der Verstelleinrichtung zur Steuerung derselben gekoppelt ist; und
2. b) eine Traktionsüberwachungseinrichtung umfasst,

wobei die Steuereinrichtung mit der Traktionsüberwachungseinrichtung gekoppelt und zum Empfang und zur Verarbeitung mindestens eines Datenwertes der Traktionsüberwachungseinrichtung, welcher einem Schlupf oder einer Traktion eines Reifens (2) des Kraftfahrzeugs zugeordnet ist, ausgebildet ist,
wobei die Traktionshilfeanordnung weiterhin eine Fahrzeugsteuerung aufweist, welche mit der Steuereinrichtung, die zur Verarbeitung von mindestens einem weiteren Datenwert der Fahrzeugsteuerung ausgebildet ist, wobei der weitere Datenwert der Fahrzeugsteuerung einem Betriebszustand des Kraftfahrzeugs zugeordnet ist, der die Traktion direkt oder indirekt betrifft, weist die Verfahrensschritte auf:

• (S1) Ermitteln von dem mindestens einen Datenwert, der einem Schlupf oder einer Traktion eines Reifens des Kraftfahrzeugs zugeordnet ist;
• (S2) Aktivieren der jeweiligen Traktionshilfevorrichtung anhand des ermittelten mindestens einen Datenwertes; und
• (S3) Automatisches oder/und manuelles Deaktivieren der jeweiligen aktivierten Traktionshilfevorrichtung, wobei die Verstellung der Traktionshilfevorrichtung in die Ruhestellung automatisch anhand des mindestens einen weiteren Datenwertes der Fahrzeugsteuerung mittels der Steuereinrichtung erfolgt.

A method for operating a traction aid device of a traction aid arrangement of a motor vehicle described above, wherein the traction aid arrangement

1. a) the traction aid device with a rotation chain device which is adjustable with an adjusting device from a rest position into an operating position and back, and a control device which is coupled to the adjusting device for controlling the same; and
2. b) comprises a traction monitoring device,

wherein the control device is coupled to the traction monitoring device and for receiving and processing at least one data value of the traction monitoring device which indicates a slip or traction of a tire ( 2 ) is assigned to the motor vehicle, is designed,
wherein the traction aid arrangement further comprises a vehicle control which, together with the control device which is designed to process at least one further data value of the vehicle control, the further data value of the vehicle control being assigned to an operating state of the motor vehicle which relates directly or indirectly to the traction, has the method steps on:

• (S1) determining the at least one data value which is associated with a slip or traction of a tire of the motor vehicle;
• (S2) activating the respective traction aid device on the basis of the determined at least one data value; and
• (S3) Automatic or / and manual deactivation of the respective activated traction aid device, the traction aid device being automatically adjusted into the rest position on the basis of the at least one further data value of the vehicle control by means of the control device.

When the at least one data value is ascertained, a further data value is ascertained which is assigned to an operating state of the motor vehicle, as a result of which an area of use is enlarged.

It takes place in process step ( S2 ) Automatically activate the respective traction aid device to adjust the traction aid device to the operating position based on the at least one data value of the traction monitoring device by means of the control device.

In yet another embodiment, when the respective traction aid device is activated, a rotary drive of the traction aid device is switched on, in particular when starting off or when the respective tire is stationary.

A start-up assistance device of a motor vehicle is characterized in that it has the traction aid arrangement described above and / or is designed to carry out the method described above.

In another embodiment, the control device can also be part of a brake control device, e.g. the brake control software.

The traction aid arrangement can always be switched on when the vehicle is in operation and can always intervene, e.g. even with surprising smoothness, e.g. no snow chains are attached.

The invention will now be explained in more detail using an exemplary embodiment with reference to the accompanying drawing of the one figure, which shows a schematic block diagram of a traction aid arrangement according to the invention on a motor vehicle wheel.

The motor vehicle wheel is here schematically as a tire 2 a motor vehicle, not shown, for example a commercial vehicle, with an axis of rotation 2a shown. The mature 2 is in contact with a part of its tread, not shown, in contact with a floor 3 ,

The traction aid arrangement is shown and described here for only one wheel. The arrangement shown can of course be seen for both wheels of a driven axle, as well as for all other wheels of the other axles of a motor vehicle.

In this exemplary embodiment, the traction aid arrangement comprises a traction aid device 1 with a rotating chain device 4 , a control unit 10 and a brake control unit 13 of the motor vehicle, not shown.

The rotation chain device 4 is with an adjustment device 5 , a rotating member 6 and several traction aid elements 7 educated. It is with the adjustment device 5 on the motor vehicle near the tire 2 attached and in the figure in a rest position 15 and in an operating position 16 shown.

The adjustment device 5 is with the rotation link 6 by means of a mechanical connection 8th , for example a cantilever arm, connected and designed to the rotating member 6 from the rest position 15 in the operating position 16 and adjust back. In the exemplary embodiment shown, such an adjustment takes place in such a way that the rotary member 6 from the rest position 15 clockwise against the tire about an axis perpendicular to the drawing 2 in the operating position 16 and from this back to the rest position 15 is pivoted.

The rotation link 6 is on the mechanical connection 8th about an axis of rotation 6a rotatably attached. In this embodiment, the rotating member 6 an extensive friction lining for interaction with an inner tire flank 2 B of the tire 2 on. The axis of rotation 6a is in the operating position 16 here at a right angle to the axis of rotation 2a and can be inclined at an angle to the front axle of the motor vehicle, not shown. This can also be done adjustable. On the rotating link 6 are several traction aid elements 7 hanging in the form of chains.

At rest 15 hang the traction aid elements 7 down and are off the ground 3 away. They can also be accommodated in a housing or a protective covering.

When the contact of the tire 2 to the floor 3 e.g. through snow, ice, mud or the like. and thus the traction between the tires 2 and the floor 3 is impaired, the adjusting device pivots 5 the rotational link 6 for traction aid from the rest position 15 in the operating position 16 , The circumference comes with the friction lining of the rotating member 6 in contact with the tire flank 2 B of the rotating tire 2 in contact. Because of the rotating tire 2 becomes the friction lining 6 in rotation around the axis of rotation 6a offset, the traction aid elements 7 in front of the tires 2 between its tread and the floor 3 to be flung. The traction aid elements 7 are also known as slingshots. In this way, a traction aid through the traction aid device 1 achieved.

The control unit 10 stands with the adjustment device 5 via a control line 11 in connection and controls the adjustment device 5 , For this purpose, a drive device (not shown), for example an electric geared motor or a pneumatic / hydraulic cylinder, is activated around the rotary chain device 4 from the rest position 15 in the operating position 16 and pan back.

The control unit 10 is also connected to a traction monitoring device, which in the exemplary embodiment shown is a brake control device 13 or part of the brake control unit 13 of the motor vehicle, not shown, is connected. Via this connection, the control unit 10 Signals from the traction monitoring device or the brake control unit 13 transmitted which the control unit 10 evaluates and accordingly the rotation chain device 4 activated or deactivated.

Is now based on these signals or data from the brake control unit 13 and thus the braking system (eg ASR) of the motor vehicle from the control unit 10 determines that there is a slip between the tires 2 the drive wheels and the ground 3 the control unit switches 10 the rotating devices 4 the drive wheels by using the associated adjustment devices 5 activated accordingly.

Such signals from the brake control unit 13 can be, for example, data values which the control device 10 compared with previously defined reference values. The signals can also from the brake control unit 13 generated directly as “slip signals” (if this is designed for this) and sent to the control device without it making a comparison with reference values.

Also, for example, during braking from the data values of the brake control unit 13 from this or the control device 10 determined that there was insufficient traction between tires 2 and floor 3 is present, the rotary chain devices 4 for all tires 2 or for all existing traction aid devices 1 of the motor vehicle can be switched on and thus shorten a braking distance significantly.

The control device 10 is also in this embodiment with a vehicle control 14 connected, for example via a motor vehicle bus (CAN). In this way, the control device 10 Process further data values (parameters) of operating states of the motor vehicle, which can also indirectly affect traction, for example, and, if necessary, the rotary chain devices 4 selectively connect. This can be the case, for example, if a tractor-trailer threatens to collapse on slippery roads and, for example, a corresponding angle of rotation sensor detects this. Then the control device 10 the rotating chain devices belonging to the trailer or semitrailer 4 selectively activate and thus give an ESP the opportunity to keep the semitrailer stable.

In the exemplary embodiment shown in the figure, the rotary chain device has 4 an additional rotary drive 9 on which has an electrical connection with the adjusting device 5 and over the control line 11 with the control device 10 communicates.

The rotary drive 9 serves to rotate the rotating member 6 with the traction aid elements 7 around the axis of rotation 6a , This is necessary, for example, if the tire 2 stands still, for example before starting off, especially on an incline. In this way, the traction aid elements 7 even when the motor vehicle is stationary so in front of the tires 2 be moved so that the driver receives the traction aid immediately when starting off. The direction of rotation of the rotary drive 9 is the direction of rotation of the associated tire 2 adjusted so that the traction aid elements 7 always in front of the tire 2 to be ordered.

The rotary drive 9 can be designed, for example, as a pneumatic, hydraulic or electrical drive. Via the electrical connection 12 can in the case of a pneumatic and / or hydraulic rotary drive 9 an associated solenoid valve can be controlled. Such a solenoid valve can, for example, in the control unit 10 , in the brake control unit 13 integrated or arranged in another suitable place.

In a method for operating a traction aid device of a motor vehicle, signals or data values are determined in a first step that indicate a slip between tires 2 and floor 3 assigned. In a second step, the control device activates 10 the respective rotation chain devices on the basis of these ascertained signals or data values 4 , Then, in a third step, the rotating chain devices 4 by the control device 10 deactivated again.

Depending on the speed of the respective tire 2 with the slip found, the control device 10 the associated rotary drive 9 the respective rotating chain device 4 also switch on.

The traction aid device 1 can also be part of a (slope / off-road) start-up assistance device.

In an embodiment not shown, the data determination unit can also be connected to sensors, which each have the traction between an assigned tire 2 and floor 3 to capture.

So it is conceivable that the control device 10 Part of software for the traction monitoring device or the brake control unit 13 is.

LIST OF REFERENCE NUMBERS

1

Traction assist device

2

tires

2a

axis of rotation

3

ground

4

Rotation link assembly

5

adjustment

6

rotary member

6a

axis of rotation

7

Traction aid element

8th

Mechanical connection

9

rotary drive

10

control unit

11

control line

12

Electrical connection

13

Brake control unit

14

vehicle control

15

rest position

16

operating position

Claims (10)

Traction aid arrangement for a motor vehicle, comprising: a) a traction aid device (1) with a rotation chain device (4), which can be adjusted from an idle position (15) to an operating position (16) and back with an adjusting device (5), and a control device (10 ), which is coupled to the adjusting device (5) for controlling the same; and b) a traction monitoring device; wherein the control device (10) is coupled to the traction monitoring device and is designed to receive and process at least one data value of the traction monitoring device which is assigned to a slip or traction of a tire (2) of the motor vehicle, the traction aid arrangement further comprising a vehicle controller (14) which, together with the control device (10), which is designed to process at least one further data value of the vehicle control system (14), the further data value of the vehicle control system (14) being assigned to an operating state of the motor vehicle which relates directly or indirectly to traction, wherein the traction aid device (1) is automatically adjusted to the rest position on the basis of the at least one further data value from the vehicle controller (14) by means of the control device (10), characterized in that the traction aid device (1) is automatically adjusted to the operating position on the basis of the at least one data value of the traction monitoring device by means of the control device (10). Traction aid arrangement after Claim 1 , characterized in that the control device (10) is designed to compare the at least one data value of the traction monitoring device with at least one previously definable reference value. Traction aid arrangement after Claim 1 or 2 , characterized in that the control device (10) is designed to compare the at least one further data value of the vehicle controller (14) with at least one previously definable reference value. Traction aid arrangement after Claim 3 , characterized in that the rotary chain device (4) has its own rotary drive (9). Traction aid arrangement after Claim 4 , characterized in that the rotary drive (9) is designed electrically, pneumatically or hydraulically. Traction aid arrangement according to one of the preceding claims, characterized in that the traction monitoring device is connected to at least one sensor which detects a slip or traction of a tire (2) of the motor vehicle. Traction aid arrangement according to one of the preceding claims, characterized in that the traction monitoring device is a brake control device (13) or a component of a brake control device (13). Method for operating a traction aid device (1) of a traction aid arrangement of a motor vehicle according to one of the preceding claims, wherein the traction aid arrangement a) the traction aid device (1) with a rotation chain device (4) which is moved from an inoperative position (15) to an adjusting device (5) Operating position (16) and adjustable back, and a control device (10) which is coupled to the adjusting device (5) for controlling the same; and b) comprises a traction monitoring device, the control device (10) being coupled to the traction monitoring device and being designed to receive and process at least one data value of the traction monitoring device which is associated with a slip or traction of a tire (2) of the motor vehicle, the Traction aid arrangement further comprises a vehicle controller (14) which, together with the control device (10), is designed to process at least one further data value of the vehicle controller (14), the further data value of the vehicle controller (14) being associated with an operating state of the motor vehicle, which relates directly or indirectly to the traction, with the method steps: (S1) determining the at least one data value which is assigned to a slip or traction of a tire (2) of the motor vehicle and the at least one further data value which is related to an operating state of the vehicle vehicle which directly or indirectly relates to traction (S2) activating the respective traction aid device (1) on the basis of the determined at least one data value and / or on the basis of the at least one further data value; and (S3) Automatically and / or manually deactivate the respective activated traction aid device (1), wherein the adjustment of the traction aid device (1) into the rest position automatically on the basis of the at least one further data value of vehicle control (14) by means of the control device (10), characterized characterized in that in method step (S2) activation of the respective traction aid device (1), the traction aid device (1) is automatically adjusted to the operating position on the basis of the at least one data value of the traction monitoring device by means of the control device (10). Procedure according to Claim 8 , characterized in that when the respective traction aid device (1) is activated, a rotary drive (9) of the traction aid device (1) is switched on. Starting assistance device of a motor vehicle, characterized in that the starting assistance device is a traction assistance arrangement according to one of the Claims 1 to 7 has and / or to carry out a method according to one of the Claims 8 or 9 is trained.

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