WO2014070083A1

WO2014070083A1 - Method and system for load transfer in a vehicle

Info

Publication number: WO2014070083A1
Application number: PCT/SE2013/051259
Authority: WO
Inventors: Ines KASUMOVIC; Tobias RIGGO
Original assignee: Scania CV AB
Current assignee: Scania CV AB
Priority date: 2012-10-29
Filing date: 2013-10-29
Publication date: 2014-05-08
Anticipated expiration: 2015-04-29
Also published as: DE112013004820T5; BR112015009035A2; SE537724C2; SE1351279A1; BR112015009035B1

Abstract

Method (600) and system (700) for the control of load transfers to a vehicle (200) comprising a bogie (220) with at least one front axle (230-1) and one rear axle (230-2). Method (600) comprising confirmation (601) of the vehicle's driving condition, determination (602) of a load transfer configuration for the vehicle (200), based on the vehicle's confirmed (601) driving condition, through control of a driver-controlled control (300) for the selection of a load transfer configuration, generation (603) of a control signal in a control device (710), which may be impacted by the driver-controlled control (300), to control the load transfer configuration according to the adjustment (602) made by the driver-controlled control (300), sending (604) of the generated (603) control signal from the control device (710) to a control mechanism (720) for load transfers placed in connection with the bogie (220), and control (605) of load transfers to the bogie (220) via the control mechanism (720) in accordance with the adjustment (602) made by the driver-controlled control (300).

Description

METHOD AND SYSTEM FOR LOAD TRANSFER IN A VEHICLE

TECHNICAL FIELD

The invention pertains to a method and a system in a vehicle. Specifically, the invention provides a mechanism for the regulation of load transfers in a vehicle comprising a bogie with at least one front axle and one rear axle.

BACKGROUND Vehicles with a bogie and/or tri-axle bogie are increasingly common in current vehicle fleets, partly because of accessibility and partly because of loading capacity. These vehicles are used in different applications and have different accessibility requirements and different requirements with respect to how they use load transfers.

Vehicle in this context means, for example, a truck, articulated truck, pick-up, van, camper, work truck, car, emergency vehicle, vessel, van, ATV, skidder, excavator, crane truck, tanker, motorcycle, wheel loader, moped, scooter, limousine, sports car, racing car, bumper car, truck bed, boat trailer, lawn mower, tank, snowmobile, snow cat, caravan, all-terrain vehicle, tractor, go-cart, bus, combine harvester, farm machinery or a similar manned or unmanned motorised vehicle, designed for land-based geographic transportation.

A bogie is a device which is usually located under the rear section below a carriage or vehicle with 2, 3, 4 , 5, etc. axles, with the objective of spreading the vehicle's load over several axles and thus reducing the axle pressure, increasing the loading capacity and also distributing the wheel pressure against the road, which, for example, entails less wear and tear of the roads and rips up less gravel when the vehicle is driven on a gravel road. Trucks and similar vehicles are often built with a bogie, especially when they are used for heavy transports. A bogie has at least two axles, which have a centre distance of less than two metres. In cases where a vehicle is built with three axles, and the distance between the first and third axles is not less than five metres, this is often termed a "tri-axle" instead of a bogie.

A truck bogie is usually not rotatable as it is in rail vehicles, which causes a certain tyre wear. In order to eliminate or at least reduce this tyre wear, the wheels on one of the axles are sometimes rotatable, so that they swing outwards when the front wheels rotate, following the swing radius .

A tri-axle bogie is the term used for the special bogie axle with three axles. One or several wheels may be located on each axle end.

The wheel axles which are included in a bogie axle may either be driving, in which case they are termed driving axles, or simply rolling, in which case they are termed tag axles. A bogie may be comprised of driving axles only, or a combination of at least one driving axle and one or several tag axles. If more than one axle is driving, the constructions are sometimes termed tandem or tridem.

When a load transfer is carried out in a vehicle with a tri- axle bogie, see Fig. 1A, which has a tag axle and two driving axles according to prior art, the weight is first transferred from the tag axle to both driving axles, see Fig. IB. The load is then transferred from one driving axle to the other driving axle, see Fig. 1C. The reason for making such a load transfer may be to increase the pressure against the base in order to increase friction and thus achieve better traction.

According to existing technology, it is predetermined via parameters from which driving axle the weight should be transferred, usually from the front driving axle to the rear driving axle. This means that the user has no possibility of adapting the load transfer to their requirements. It is only possible to select whether all the bogie axles should be engaged, or whether the load transfer should be made to a certain predetermined driving axle. To summarise, there is a need to improve the steering and control of load transfers in vehicles with bogie axles.

SUMMARY

One objective of this invention is therefore to be able to adapt and control load transfers in a vehicle with a bogie axle with two or more axles, in order to solve at least one of the problems specified above and thus to achieve an enhanced vehicle.

According to one first aspect of the invention, this objective is achieved by a method for the regulation of load transfers in a vehicle comprising a bogie with at least one front and one rear axle. The method comprises a determination of the vehicle's driving conditions. Further, the method comprises the determination of a load transfer configuration for the vehicle, based on the vehicle's determined driving conditions, through regulation of a driver-controlled control for the selection of a load transfer configuration. The method also comprises the generation of a control signal in a control device, which may be impacted by the driver-controlled control, in order to regulate the load transfer configuration according to the regulation made by the driver-controlled control. Further, the method also comprises sending of the generated control signal from the control device to a control mechanism for load transfer located in connection with the bogie. In addition, the method comprises the adjustment of load transfers on the bogie via the control mechanism in accordance with the adjustment made by the driver-controlled control . According to a second aspect of the invention, this objective is achieved by a system in a vehicle. The system comprises a bogie with at least one front axle and one rear axle in order to adjust load transfers in the vehicle. The system comprises a driver-controlled control for the selection of a load transfer configuration based on the vehicle's determined driving conditions. In addition, the system comprises a control device which may be impacted by the driver-controlled control and adapted to generate and send a control signal. In addition, the system comprises a control mechanism, adapted to receive the control signal and adjust the load transfer on the bogie in accordance with the adjustment made by the driver-controlled control.

By enabling the adjustment of the load transfer between driving axles and thus varying the wheel base, it will be possible to adjust the vehicle's characteristics, such as swing radius, control characteristics and axle load, to the given driving conditions which the driver experiences. Thus, an improvement of the vehicle is achieved.

A variable load transfer between driving axles may also make transports more efficient, having regard to other aspects such as time, wear and tear, and fuel consumption, according to some embodiments.

Other advantages and other new features are set out in the detailed description of the invention, below.

LIST OF FIGURES

The invention is described in further detail with reference to the enclosed figures, which illustrate embodiments of the invention :

Figure 1A is an illustration of a load transfer in a vehicle with a tri-axle bogie according to existing technology.

Figure IB is an illustration of a load transfer in a vehicle with a tri-axle bogie according to the existing technology.

Figure 1C is an illustration of a load transfer in a vehicle with a tri-axle bogie according to the existing technology .

Figure 2 is an illustration of a load transfer in a vehicle with a tri-axle bogie according to one embodiment.

Figure 3A is an illustration showing one embodiment of the invention . Figure 3B is an illustration showing one embodiment of the invention .

Figure 4A is an illustration showing one embodiment of the invention . Figure 4B is an illustration showing one embodiment of the invention .

Figure 5A is an illustration showing one embodiment of the invention .

Figure 5B is an illustration showing one embodiment of the invention.

Figure 6 is a flow diagram which illustrates one embodiment of a method.

Figure 7 is an illustration of a control device according to one embodiment of the invention.

DETAILED DESCRIPTION OF THE INVENTION

The invention is defined as a method and a system, which may be realised in one of the embodiments described below. This invention may, however, be carried out in many different forms and should not be seen as limited to the embodiments described herein, which are instead intended to illuminate and illustrate different aspects of the invention.

Further aspects and features of the invention may become apparent from the following detailed description, when considered in combination with the enclosed figures. The figures should, however, only be seen as examples of various embodiments of the invention and should not be seen as limiting the invention, which is limited only by the enclosed claims. Further, the figures are not necessarily drawn to scale and are, unless otherwise indicated, intended to illustrate the aspects of the invention conceptually.

Figure 2 shows a vehicle 200 adapted for load transfers by a tri-axle bogie. The vehicle 200 has a front wheel axle 210 and a rear bogie 220 consisting of a first driving axle 230- 1, a second driving axle 230-2 and a tag axle 230-3. The vehicle 200 is arranged to travel forward in a driving direction 240. The terms front and rear in this context refer to the vehicle's travelling direction 240.

The set of the bogie 220 on the vehicle 200 which is described above, i.e. a tri-axle bogie, is merely an example. The vehicle 200 may, for example, be equipped with a number of front wheel axles 210. Further, the vehicle 200 may have a rear bogie 220 consisting of any number of axles 230-1, 230-2, 230-3 in some embodiments; such as two, three, four, five, six,..., ∞, etc. The rear bogie axle may also comprise any combination of driving axles 230-1, 230-2 and tag axles 230-3 in different embodiments. For example, all axles 230-1, 230-2, 230-3 in the bogie 220 may consist of driving axles 230-1, 230-2 in certain embodiments. In other embodiments, all the axles 230-1, 230-2, 230-3 in the bogie 220, except one axle, may consist of tag axles 230-3. This may also be expressed as: n = k + i where n > 1 and k > 0, where: n + number of axles in the bogie 220, k = number of driving axles 230-1, 230-2 and i = number of tag axles 230- 3. In some embodiments, the axles 230-1, 230-2, 230-3 in the bogie 220 may be suspended in suspension devices where at least some of these have a springy mounting with adjustable stiffness. Thus, the pressure may be distributed among the axles 230-1, 230-2, 230-3.

In some embodiments, the springy mounting with adjustable stiffness may be pneumatically or hydraulically manoeuvrable, for example comprising air suspension including air supply and a control valve to regulate the air supply.

The vehicle 200, or perhaps rather its driver, may sometimes want the load weight distributed over all the axles 230-1, 230-2, 230-3 in the bogie 220. Thus, it is possible to maximise the size of the payload, since the load weight may thus be distributed over all the wheel axles 230-1, 230-2, 230-3. One example of this will be illustrated later and discussed in connection with the description of Fig. 3A and Fig. 3B .

However, the vehicle's driver may, for example when driving on a slippery surface, prefer a load transfer from the front driving axle 230-1 to the rear driving axle 230-2, as illustrated and discussed in connection with the description of Fig. 4A and Fig. 4B. Vehicles 200 driving on a slippery surface may in certain cases prefer to only unload the tag axle 230-3 and transfer this weight to the driving axles 230-1, 230-2 for reasons of accessibility. The tag axle 230- 3 may either continue to roll on the road surface, but with reduced or zero load; alternatively, the tag axle 230-3 may be lifted up. However, as short a wheel base as possible to improve the swing radius may be required, especially for vehicles 200 driven on a narrow road and/or to avoid unnecessarily tearing up the road. It is then advantageous and desirable to carry out a load transfer from the tag axle 230-3 and the rear driving axle 230-2 to the front driving axle 230-1, as illustrated in Fig. 5A and Fig. 5B.

With this type of load transfer, the swing radius is improved, but the stability in the vehicle 200 and its accessibility on a slippery surface is significantly worse than when the load transfer is made to the rear driving axle 230-2. Also, in this alternative, the tag axle 230-3 may either continue to roll on the road surface, but with reduced or zero load; alternatively the tag axle 230-3 may be lifted up.

The present invention also pertains to configurations where besides that the tag 230-3 may be lifted up, also that the bogie driving axle 230-1 may be lifted up. Through this configuration, configurations with liftable tag axle 230-3 and liftable driving axle 230-1 are obtained and that load transfers can be performed between the axles 230-1, 230-2 and 230-3. It results in more possibilities of combinations of the load transfer function in that the wheel base and wheel swing radius can be adapted to driving conditions. For an example if load transfers is performed from the front driving axle 230-1 to the rear driving axle 230-2 and the front driving axle 230-1 is lifted up, then the pressure on the rear driving axle 230-2 is increased and thereby longer wheelbase is gained and better stability on regular highway driving. It is not necessary to lift the axels (230-1 and/or 230-3) in order to get better swing radius, it may be sufficient to load transfer from either of them to the driving axle 230-02 and if it is possible also to lift 230- 01 and/or 230-13.

It is not unusual for all of these different configurations illustrated in figures 3-5 of the axles 230-1, 230-2, 230-3 in the bogie 220 to be needed in one and the same vehicle 200. One example of such a vehicle 200 is dairy trucks. In order to avoid tearing up the yard unnecessarily, and additionally to be able to turn with as small a swing radius as possible, it is an advantage for the vehicle 200 when navigating on the yard to be able to select a load transfer to the front driving axle 230-1 in the vehicle's bogie 220. Other examples of vehicles 200 which may benefit from having a reduced swing radius are vehicles 200 which need to be driven in narrow spaces such as a garage; emergency vehicles such as fire trucks and similar which need to navigate near a fire, and forest vehicles which need to navigate between trees, etc.

However, during road transport it may be preferable instead to drive the vehicle 200 with a load-displacement to the rear driving axle 230-2, in particular in slippery road conditions, for improved control, stability and traction.

When the vehicle 200 has collected a load, e.g. milk in the event the vehicle 200 is a dairy truck, it may be advantageous to distribute the load over several axles, or even all the wheel axles 230-1, 230-2, 230-3 in the bogie 220.

The activation of the function may be resolved with a control 300, for example in the form of or comprising a handle 310 or a three-position switch, which gives the driver the ability to select among the various load transfers, in some embodiments, which is illustrated in figures 3B, 4B and 5B.

The design of this control 300 in the figures should only be viewed as an example of a design. For example, the control 5 300 may be equipped with a prompt for the different alternatives, such as "small swing radius required", "heavy load", and/or "motorway", or similar texts. Further, the control 300 may be designed as a switch, a number of pushbuttons, a slider, a software button or similar.

10 Thus, the driver is granted the ability to adjust the vehicle's load transfer to the driving situation, the road condition and the load, which leads to an enhanced vehicle 200, with improved driving behaviour, in particular in situations when a small swing radius is an advantage.

15 Figure 6 illustrates an example of an embodiment for the invention. The flow diagram in figure 6 illustrates a method 600 for the regulation of load transfers in a vehicle 200, comprising a bogie 220 with at least one front axle 230-1 and one rear axle 230-2. The bogie 220 may comprise at least

20 two driving axles 230-1, 230-2 and at least one tag axle 230-3 in certain embodiments. The bogie 220 may comprise a tri-axle bogie, a quadruple bogie, a quintuple bogie, a sextuple bogie, a septuple bogie, an octuple bogie and/or a nonuple bogie, etc. in different embodiments.

25 In order to regulate the load transfer to the vehicle 200 correctly, the method 600 may comprise a number of steps 601-605. However, it should be noted that certain parts of the steps described herein are only comprised in some alternative embodiments of the invention. Further, the steps

30 601-605 described herein may be carried out in a somewhat different chronological order than suggested by the numbering, and some of these may be completed in parallel with each other. The method 600 comprises the following steps : Step 601

The vehicle's driving condition is determined.

This determined driving condition, which may be the existing or reguired condition, may comprise: reduced swing radius, improved control characteristics and traction, and/or load maximisation. This driving condition may be confirmed or determined by the vehicle's driver. The driver can, based on prevailing environmental conditions and/or vehicle related information, determine the said driving conditions. Environmental conditions include that the driver takes into account such as current road condition, geographical position and/or weather conditions. But the driver also takes into account for vehicle related information such as the vehicle's load and/or the vehicle's driving behaviour. With the vehicle's driving behaviour it is for an example referred to if the vehicle tilts or if there is different braking grip on different wheels or instabilities in the steering wheel. The determination is made in connection with driving the vehicle and based on vehicle related information. In this way the regulation of load transfers can be done based on current road condition, geographical position, weather condition but also based on information about the vehicle's driving behaviour and/or the vehicle's load. In certain driving situations it may be advantageous to distribute load over several axles, or even to all the wheel axles in the bogie, in order to maximise the size of the payload. In an alternative embodiment, the driver is informed about the prevailing environmental conditions and/or vehicle related information via the communication module 740 and the driver can thus determine the vehicle's driving condition. The communication module 740 is adapted to receive environmental signals from the control device 710 representing the prevailing environmental conditions but also vehicle related information such as information about vehicle load and information about the vehicle's driving behaviour. Environmental signals (not shown in figure) represents e.g. information related to friction between the vehicle and the road surface, geographical position obtained through a positioning system, and/or prevailing weather conditions. The control device 710 receives data from the vehicle's internal systems and sensors to generate environmental signals and vehicle related information. Example of the vehicle's internal systems and sensors are tilt sensors, gyros, accelerometers, steering wheel angle sensors, yaw-rate sensors, temperature sensors, rain sensors, load sensing sensors, but also information from e.g. braking system and stability system can be used. Based on the information regarding the prevailing environmental conditions and vehicle related information the driver can determine the vehicle's driving conditions and thus the regulation of load transfer can be made.

Step 602

A load transfer configuration for the vehicle 200 is determined, based on the vehicle's determined 601 driving condition, by adjusting a driver-controlled control 300 for the selection of a load transfer configuration. Thus, the load transfer configuration for the vehicle 200 is determined based on the driving conditions that the driver has determined. If the driver believes that he will drive the vehicle in an environment with slippery road conditions so chooses, regulates the driver, via a driver-controlled control 300, the load transfer function which is best suited for the prevailing environmental conditions for as in this case slippery road conditions.

The driver-controlled control 300, which is adjustable on a load transfer configuration comprising: load distribution over all axles 230-1, 230-2 included in the bogie 220, load transfer to the rear axle 230-2 in the bogie 220, and load transfer to the front axle 230-1 in the bogie 220.

The determination of the load transfer configuration may be made so that the load transfer to the front axle 230-1 in the bogie 220 may be made when the driver wants a reduced swing radius. Further, the load transfer to the rear axle 230-2 in the bogie 220 may be made when the driver wants improved control characteristics and traction. The load distribution may also be made to all axles 230-1, 230-2 included in the bogie 220 when load maximising is desired, according to some embodiments.

Step 603

A control signal is generated in a control device 710, which may be impacted by the driver-controlled control 300, in order to regulate the load transfer configuration according to the regulation 602 made by the driver-controlled control 300.

The adjustment of the load transfer from a first load transfer configuration, where the load distribution is made on all axles 230-1, 230-2, 230-3 comprised in the bogie 220, to either of the front axle 230-1 or the rear axle 230-2 in the bogie 220, according to some embodiments. Such an adjustment of the load transfer may be started with a load transfer from the tag axle 230-3 to the driving axles 230-1, 230-2, according to some embodiments. Step 604

The generated control signal 603 is sent from the control device 710 to a control mechanism 720 for load transfers located in connection with the bogie 220.

This control signal may be sent via an interface, which may consist of a wireless interface in some embodiments, but may also consist of a wired interface. The wireless interface may consist of a radio transmitter based on wireless communications technology such as 3rd Generation Partnership Project (3GPP), Long Term Evolution (LTE) , LTE-Advanced, Evolved Universal Terrestrial Radio Access Network (E- UTRAN) , Universal Mobile Telecommunications System (UMTS) , Global System for Mobile Communications/Enhanced Data rate for GSM Evolution (GSM/EDGE) , Wideband Code Division Multiple Access (WCDMA) , World-Wide Interoperability for Microwave Access (WiMax) , Wireless Local Area Network (WLAN) , Ultra Mobile Broadband (UMB) , Bluetooth (BT) , or an infrared transmitter, mentioned herein as a few possible examples of wireless communication.

In some embodiments, communication may be via a communication bus. Such a communication bus may be arranged to connect a number of electronic control devices (ECUs) or controllers, and different components arranged on the vehicle 200.

Step 605 The load transfer on the bogie 220 is regulated via the control mechanism 720 in accordance with the adjustment 602 made by the driver-controlled control 300.

Figure 7 illustrates one embodiment of a system 700 in a vehicle 200, the system 700 of which comprises a bogie 220 with at least one front axle 230-1 and one rear axle 230-2 in order to adjust the load transfer on the vehicle 200. The bogie 220 comprises at least two driving axles 230-1, 230-2 and at least one tag axle 230-3. The system 700 comprises a driver-controlled control 300 for the selection of a load transfer configuration based on the vehicle's determined driving condition. This determined driving condition, which may be the existing or reguired condition, may comprise: reduced swing radius, improved control characteristics and traction, and/or load maximising. This driving condition may be confirmed or determined by the vehicle's driver.

Further, the system 700 comprises a control device 710, which may be impacted by the driver-controlled control 300 and is adapted to generate and send a control signal to adjust the load transfer.

The system 700 also comprises a control mechanism 720, adapted to receive the control signal and adjust the load transfer to the bogie 220 in accordance with the adjustment made by the driver-controlled control 300.

In order to correctly generate and send the control signal to adjust the load transfer, the said control device 710 comprises a number of components, which are described in more detail in the text below. Some of the partial components described only occur in certain, but not necessarily all, embodiments. There may also be some additional electronic components in the control device 710, which are not entirely necessary in order to understand the function of the control device 710 according to the invention.

The control device 710 comprises a processing circuit 730, a communication module 740 and, in some embodiments, a memory 750.

The communication module 740 is adapted to receive signals from the driver-controlled control 300. These signals may be received over a wireless or wired interface from the control 300. Also, the communication module 740 is arranged to send instructions to the control mechanism 720, the control mechanism 720 of which in turn impacts the vehicle's load transfer. The communication module 740 is according to one embodiment adapted to receive environmental signals and/or vehicle related information from the control device 710 representing the prevailing environmental conditions and vehicle related information. The control device 710 receives data from the vehicle's internal systems and sensors to be able to generate environmental signals and vehicle related information .

The communication module 740 may in some embodiments consist of a separate sender and receiver. The communication module 740 may in some embodiments consist of a transceiver, which is adapted to send and receive radio signals, and where parts of the construction, such as the antenna, are joint to sender and receiver. Further, the communication module 740 may be adapted to wireless information transfer via a wireless interface, such as: radio sender based on wireless communications technology such as 3rd Generation Partnership Project (3GPP) , Long Term Evolution (LTE) , LTE-Advanced, Evolved Universal Terrestrial Radio Access Network (E- UTRAN) , Universal Mobile Telecommunications System (UMTS), Global System for Mobile Communications/Enhanced Data rate for GSM Evolution (GSM/EDGE) , Wideband Code Division Multiple Access (WCDMA) , World-Wide Interoperability for Microwave Access (WiMax) , Wireless Local Area Network (WLAN) Ultra Mobile Broadband (UMB) , Bluetooth (BT) , or infrared sender, to mention a few possible examples of wireless communication.

However, the communication module 740 may in some embodiments be especially adapted to wired information exchange with the control 300, with the control mechanism 720 and/or the vehicle's data bus or communication bus. Such a communication bus is arranged to connect a number of electronic control devices (ECUs) or controllers, and different components arranged on the vehicle 220. The vehicle's communication bus, which may consist of one or several of: a cable, a data bus, such as a CAN (Controller Area Network) bus, a MOST (Media Oriented Systems Transport) bus, or another bus configuration; or of a wireless connection, for example according to one of the technologies listed above.

The processor circuit 730 mentioned above may consist of, for example, one or several Central Processing Units (CPUs), microprocessors or other logics designed to interpret and carry out instructions and/or to read and write data. The processor circuit 730 may handle data for inflow, outflow or data processing of data, comprising also buffering of data, control functions and similar. In some alternative embodiments, the control device 710 comprises a memory device 750, which consists of a storage medium for data. The memory device 750 may, for example, consist of a memory card, flash memory, USB memory, hard disk or other similar data storage device, for example any from the following group: ROM (Read-Only Memory) , PROM (Programmable Read-Only Memory), EPROM (Erasable PROM), Flash, EEPROM (Electrically Erasable PROM), etc. in various embodiments . Further, the invention comprises a computer program for adjustment of load transfers to a vehicle 200 comprising a bogie 220 with at least one front axle 230-1 and one rear axle 230-2. The computer program is arranged to execute the method 600 according to at least one of the previously described steps 601-605, when the computer program is executed in a processor circuit 730 in the control device 710.

The method according to the steps 601-605 for the adjustment of a control algorithm to a driver's stress level may be implemented through one or several processor circuits 730 in the control device 710, jointly with a computer program code in order to carry out one, several, any or all of the steps 601-605 described above. Thus, a computer program comprising instructions to execute the steps 601-605 may then be loaded in the processor circuit 710.

Some embodiments of the invention also comprise a vehicle 200, which comprises the system 700 described above.

Claims

1. Method (600) for the regulation of load transfers to a vehicle (200) comprising a bogie (220) with at least one front axle (230-1) and one rear axle (230-2) characterised by: confirmation (601) of the vehicle's driving condition, determination (602) of a load transfer configuration for the vehicle (200), based on the vehicle's confirmed (601) driving condition, through adjustment of a driver- controlled control (300) for the selection of a load transfer configuration, generation (603) of a control signal in a control device (710), which may be impacted by the driver-controlled control (300), in order to adjust the load transfer configuration according to the regulation (602) made by the driver-controlled control (300), sending (604) of the generated control signal (603) from the control device (710) to a control mechanism (720) for load transfers located in connection with the bogie (220), and regulation (605) of the load transfer on the bogie (220) via the control mechanism (720) in accordance with the adjustment (602) made by the driver-controlled control (300) where the determination (602) of the load transfer configuration is made so that the load transfer to the front axle (230-1) in the bogie (220) is made when the driver wants a reduced swing radius, load transfers to the rear axle (230-2) in the bogie (220) are made when the driver wants improved control characteristics and traction, and that load distribution is made to all the axles (230-1, 230-2) included in the bogie (220) when load maximising is desired and where the bogie (220) comprises at least two driving axles (230-1, 230-2) and at least one tag axle (230- 3) and where the adjustment (603) of the load transfer from the load transfer configuration where the load distribution is made to all axles (230-1, 230-2, 230-3) comprised in the bogie (220), to either the front axle (230-1) or the rear axle (230-2) in the bogie (220), starts with the load transfer being made from the tag axle (230-3) to the driving axles (230-1, 230-2).

2. Method (600) according to claim 1, where the driver- controlled control (300) is adjustable to a load transfer configuration comprising: load distribution to all axles (230-1, 230-2) included in the bogie (220), load transfer to the rear axle (230-2) in the bogie (220), and load transfer to the front axle (230-1) in the bogie (220) .

3. Method (600) according to claims 1 or 2, where the confirmed (601) driving conditions comprise: reduced swing radius, improved control characteristics and traction, and load maximising.

4. System (700) in a vehicle (200), the system (700) of which comprises a bogie (220) with at least one front axle (230-1) and one rear axle (230-2) , to control load transfers to the vehicle (200), characterised by: a driver-controlled control (300) for the selection of a load transfer configuration based on the vehicle's determined driving condition, a control device (710), which may be impacted by the driver-controlled control (300) and adapted to generate and send a control signal, and a control mechanism (720), adapted to receive the control signal and adjust the load transfer to the bogie (220) in accordance with the adjustment made by the driver- controlled control (300) and where the bogie (220) comprises at least two driving axles (230-1, 230-2) and at least one tag axle (230-3) .

5. Vehicle (200) comprising the system (700), according to claim 4, adapted for the control of load transfers according to the method (600) according to claims 1-3.

6. Computer program for the control of load transfers to a vehicle (200) comprising a bogie (220) with at least one front axle (230-1) and one rear axle (230-2) characterised by : the fact that the method (600), according to any of the claims 1-3, is carried out when a computer program is executed in a processor circuit (730) in a control device (710) .