DE112018000251T5 - Fuel supply arrangement and land-based vehicle - Google Patents

Abstract

A fuel supply arrangement (1) for a land vehicle (3) is disclosed. The fuel supply arrangement (1) comprises a first fuel tank (5) with a first fuel tank connection (7), at least one second fuel tank (9) with a second fuel tank connection (11), a first pump (13) and a fuel tank (15). The fuel tank (15) has an outlet (17), a first inlet (19) and at least one second inlet (21). The first inlet (19) is fluidly connected to the first fuel tank port (7), the second inlet (21) is fluidly connected to the second fuel tank port (11), and the first pump (13) is in fluid communication with the outlet (17) of the fuel tank (15) connected. The first pump (13) is adapted to pump fuel from the first fuel tank (5) and the at least second fuel tank (9) through the fuel tank (15). The present disclosure also relates to a vehicle (3) having a fuel supply assembly (1).

Description

TECHNICAL AREA

The present invention relates to a fuel supply arrangement for an on-land vehicle and a land-based vehicle having an internal combustion engine and a fuel supply arrangement.

BACKGROUND

Fuel supply arrangements with multiple fuel tanks are common, especially for heavy duty vehicles such as trucks. Several tanks are used to extend the possible range of the vehicle. Fuel supply assemblies having multiple fuel tanks typically include a fuel pump configured to pump fuel from a first fuel tank of the plurality of fuel tanks. Further fuel tanks of the plurality of fuel tanks are in fluid communication with the first fuel tank via conduits. During driving, fuel is pumped out of the first fuel tank, and when the fuel level in the first fuel tank decreases, fuel flows through the conduits into the first fuel tank due to the principle of communicating vessels from the further fuel tank.

The document WO 2013/0384018 A1 relates to a vehicle fuel tank assembly for a fuel having at least a first fluid and a second fluid. The tank assembly includes a tank, a partition wall disposed within the tank to create at least a first compartment for storing the first fluid and a second compartment for storing the second fluid. The position of the partition within the tank may be changed to set the volume of the first compartment and the second compartment to a predetermined value, respectively.

A common problem of fuel supply assemblies, and in particular those described above, is intake of air in the pump configured to pump fuel from the first fuel tank. The intake of air may be caused by spilling fuel in one of the fuel tanks. Such intake of air can lead to problems and malfunction of the fuel supply arrangement and the associated internal combustion engine. Further, such intake of air may be detrimental to the pump.

In view of this, there is a need for an improved fuel supply arrangement.

SUMMARY

It is an object of the present invention to provide a reliable fuel supply arrangement for a land vehicle.

According to one aspect of the invention, this object is achieved by a fuel supply arrangement for an on-land vehicle, comprising a first fuel tank having a first fuel tank connection, at least one second fuel tank having a second fuel tank connection, a first pump, and a fuel tank having an outlet, a first inlet and at least a second inlet. The first inlet is fluid-conductively connected to the first fuel tank connection. The second inlet is fluid-conductively connected to the second fuel tank connection. The first pump is fluidly connected to the outlet of the fuel tank and the first pump is configured to pump fuel from the first fuel tank and the at least second fuel tank through the fuel tank. Since the first pump is configured to pump fuel from the first fuel tank and the at least second fuel tank through the fuel tank, the risk of air suction is reduced. This is because the first pump is pumping fuel directly from the first fuel tank and the at least second fuel tank through the fuel tank rather than relying on the principle of communicating tanks. As a result, problems and malfunction of the fuel supply arrangement and an associated internal combustion engine can be prevented. In addition, damage to the pump can be avoided.

Thus, a reliable power supply arrangement for a land vehicle is provided. Consequently, the above object is achieved.

Optionally, the first pump and the fuel tank are disposed on the first fuel tank. Thereby, a fuel supply arrangement is provided which facilitates service and maintenance of the fuel supply arrangement.

Further, laying pipes connecting the first pump to the fuel tank and the fuel tanks may be facilitated.

Optionally, the fuel supply assembly further includes a buffer tank, wherein the first pump is configured to pump fuel from the first fuel tank and the at least second fuel tank into the buffer tank. Thereby, a fuel supply arrangement is provided, in the air and / or water, if pumped from any of the fuel tanks, can be handled in the buffer tank.

Optionally, the fuel supply assembly further comprises a tank module, wherein the first pump, the fuel tank and the buffer tank are arranged in the tank module. Thereby, a fuel supply arrangement is provided which can be easily maintained. Furthermore, laying pipes which fluidly connect the first pump, the fuel tank and the buffer tank may be facilitated.

Optionally, the fuel supply assembly further includes a second pump arranged to pump fuel from the buffer tank to a land vehicle high pressure pump. Thereby, fuel flow to the high pressure pump is ensured even if some air or water is sucked from the first fuel tank or the at least second fuel tank, since the second pump is configured to pump fuel from the buffer tank. As a result, the reliability of the fuel supply arrangement is further improved since, in the case of any intake of air or water, the sucked air or the water in the buffer tank is handled.

Optionally, the fuel supply assembly further comprises a fuel level monitoring unit arranged to monitor a fuel level in the buffer tank, the assembly further comprising a control unit connected to the fuel level monitoring unit and the first pump, the control unit configured to control the fuel level Pumping the first pump to keep the fuel level in the buffer tank above a predetermined threshold. Thereby, a fuel supply arrangement having still further improved reliability is provided since sufficient fuel level in the buffer tank can be ensured.

Optionally, the fuel supply assembly further includes a first valve and at least one second valve, wherein the first valve is configured to close fluid communication through the first fuel tank port if a fuel level in the first fuel tank is below a threshold, and the at least second valve thereto is arranged to close a fluid connection through the second fuel tank connection, if a fuel level in the second fuel tank is below a threshold value. Thereby, there is provided a fuel supply assembly in which the risk of air suction is further reduced because the first valve will close fluid communication through the first fuel tank port if a fuel level in the first fuel tank is below the threshold and the second valve is in fluid communication through the second fuel tank connection if a fuel level in the second fuel tank is below a predetermined value. Accordingly, a fuel supply arrangement is provided with even greater reliability.

Optionally, the first valve and the at least second valve each comprise an electric drive, a valve body and a valve seat, wherein the electric drive is connected to the valve body and arranged to control the position of the valve body relative to the valve seat between an open position and a closed position to control a fluid connection through the first and at least second fuel tank connection. As a result, a fuel supply arrangement is provided with even further improved reliability, since a shut-off of a fluid connection is ensured by the first or at least second fuel tank connection.

Optionally, the first valve is disposed in the first fuel tank, and the at least second valve is disposed in the at least second fuel tank, the first valve and the at least second valve each including a float and a switch, the float connected to and disposed with the switch is to operate the switch, if a fuel level in the fuel tank is below a threshold value, and wherein the electric drive is connected to the switch and arranged to control the position of the valve body in the closed position upon actuation of the switch. As a result, a fuel supply arrangement is provided with even greater reliability, since shut-off of a fluid connection is ensured by a fuel tank connection of a fuel tank, which will soon become empty.

Optionally, the arrangement further comprises a control unit connected to the electric drives of the first valve and the at least second valve, wherein the first fuel tank or the at least second fuel tank has a fuel tank inlet provided with a filler cap which is located at the fuel tank inlet between an open position and a closed position, wherein the arrangement further comprises a sensor connected to the control unit, wherein the sensor is arranged to detect the position of the filler cap, and wherein the control unit is adapted to, if the filler cap is moved to the open position, the first and the at least second valve, which are in a closed position to control in an open position. Thereby, a fuel supply arrangement is provided, which is a filling of the facilitates first fuel tanks and the at least second fuel tank, since then, when the filler cap is moved to the open position, each of the first and at least the second valve, which is in a closed position, is controlled in the open position. Accordingly, the first fuel tank and the at least second fuel tank can be easily filled by filling the first fuel tank or the at least second fuel tank through the fuel tank inlet.

Optionally, the valve seat is frusto-conical, with a surface of the valve body arranged to abut against the valve seat being convex. When a fuel tank soon becomes empty, the risk of particles trapped in the fuel between the valve body and the valve seat increases. However, since the valve seat is frusto-conical and because the surface of the valve body which is arranged to abut against the valve seat is convex, such a risk is reduced. Accordingly, a fuel supply assembly is provided with still further increased reliability because of the likelihood that any particles in the fuel will hinder full closure of the corresponding valve.

Optionally, each fuel tank includes a separation compartment disposed on a floor of the corresponding fuel tank, each valve disposed in a respective separation compartment. This prevents a suction of air caused by fuel sloshing. In addition, the risk of any particles in the fuel hindering complete closure of the corresponding valve is further reduced. As a result, a fuel supply arrangement is provided again with further improved reliability.

It is an object of the present invention to provide a land vehicle having conditions for reliable operation of an internal combustion engine of the land vehicle.

According to one aspect of the invention, this object is achieved by a land vehicle having an internal combustion engine and a fuel supply arrangement according to some embodiments, wherein the fuel supply arrangement is adapted to supply fuel to the internal combustion engine of the land vehicle. Since the on-land vehicle has a fuel supply assembly arranged to supply fuel to the land vehicle's internal combustion engine according to some embodiments, an on-land vehicle is provided with conditions for reliable operation of the internal combustion engine.

Accordingly, the above object is achieved.

Other features and advantages of the present invention will become apparent upon reading the appended claims and the following detailed description.

list of figures

• 1 schematisch eine Kraftstoffversorgungsanordnung für ein landgebundenes Fahrzeug gemäß einiger Ausführungsformen darstellt,
• 2 schematisch einen ersten Kraftstofftank einer Kraftstoffversorgungsanordnung gemäß einiger Ausführungsformen darstellt,
• 3a schematisch ein Ventil gemäß einiger Ausführungsformen in einer Offenstellung darstellt,
• 3b schematisch das in 3a wiedergegebene Ventil in einer Schließstellung darstellt, und
• 4 ein landgebundenes Fahrzeug mit einem Verbrennungsmotor und einer Kraftstoffversorgungsanordnung gemäß einiger Ausführungsformen darstellt.

Various aspects of the invention, including its specific features and advantages, are to be understood more readily from the embodiments which are explained in the following detailed description and the accompanying drawings, in which:

• 1 FIG. 2 schematically illustrates a land vehicle vehicle fueling assembly according to some embodiments; FIG.
• 2 schematically illustrates a first fuel tank of a fuel supply assembly according to some embodiments,
• 3a schematically illustrates a valve according to some embodiments in an open position,
• 3b schematically the in 3a represents reproduced valve in a closed position, and
• 4 FIG. 10 illustrates an on-land vehicle having an internal combustion engine and a fuel supply assembly according to some embodiments. FIG.

DETAILED DESCRIPTION

Aspects of the present invention will now be described in more detail. The same numbers apply to the same components everywhere. Well-known functions or designs are not necessarily described in detail in the interest of compact presentation and / or clarity.

1 schematically shows a fuel supply arrangement 1 for a land-based vehicle. The fuel supply arrangement 1 includes a first fuel tank 5 with a first fuel tank connection 7 , a second fuel tank 9 with a second fuel tank connection 11 and a third fuel tank 10 with a third fuel tank connection 12 , Accordingly, the fuel supply arrangement comprises 1 several fuel tanks 5 . 9 . 10 , in the illustrated embodiments, three fuel tanks 5 . 9 . 10 , The fuel supply arrangement 1 may have a different number of fuel tanks than three, for example, two, four, five, six, seven, eight, etc., where each tank is provided with a fuel tank connection. The fuel supply arrangement 1 further comprises a fuel tank 15 with an outlet 17 , a first inlet 19 , a second inlet 21 and a third inlet 22 , The first inlet 19 is fluid-conducting with the first fuel tank connection 7 of the first fuel tank 5 connected. The second inlet 21 is fluid-conducting with the second fuel tank connection 11 of the second fuel tank 9 connected. The third inlet 22 is fluid-conducting with the third fuel tank connection 12 of the third fuel tank 10 connected. Accordingly, the fuel tank includes 15 an inlet 19 . 21 . 22 per fuel tank 5 . 9 . 10 , In embodiments of the fuel supply arrangement 1 with two fuel tanks, the fuel tank points 15 two inlets, and in embodiments where the fuel supply arrangement 1 has four or more fuel tanks, the fuel tank has 15 a number of inlets corresponding to the number of tanks, wherein a tank port of each tank is fluid-conductively connected to an inlet of the fuel tank 15 connected is. The fuel tank 15 has an internal volume which conducts fluid to the outlet 17 and each of the inlets 19 . 21 . 22 connected is. The in 1 illustrated fuel tank 15 has a circular cross section and may be referred to as a fuel rail, fuel tank or the like.

In further embodiments, the fuel tank 15 have a rectangular cross section or the like. In still other embodiments, the fuel tank 15 be spherical.

The fuel supply arrangement 1 includes a first pump 13 , the fluid-conducting with the outlet 17 of the fuel tank 15 connected is. The first pump 13 is designed to fuel from the first fuel tank 5 , the second fuel tank 9 and the third fuel tank 10 through the fuel tank 15 to pump. Due to this arrangement causes the first pump 13 in the inner volume of the fuel tank 15 a vacuum that is equal to each inlet 19 . 21 . 22 of the fuel tank 15 is distributed. As a result, a substantially equal fuel flow becomes from each fuel tank 5 . 9 . 10 through the fuel tank 15 receive.

The fuel supply arrangement 1 further includes a buffer tank 23 , where the first pump 13 is set to fuel from the first fuel tank 5 , the second fuel tank 9 and the third fuel tank 10 through a water separation filter 26 in the buffer tank 23 to pump. The fuel supply arrangement 1 further includes a second pump 25 , which is arranged to fuel from the buffer tank 23 to a high pressure pump 27 of the land-based vehicle. The high pressure pump 27 is arranged to increase the fuel pressure before the fuel is an internal combustion engine 57 the land-bound vehicle is supplied. Because of this arrangement, any one of any of the tanks will 5 . 9 . 10 from the first pump 13 sucked water or air in the buffer tank 23 handled. The first pump 13 , the second pump 25 and the high pressure pump 27 can be a CAN-type pump. In the illustrated embodiments, the second pump 25 arranged to fuel out of the buffer tank 23 through a fuel filter 28 to a high pressure pump 27 of the land-based vehicle. The fuel supply arrangement 1 may have multiple fuel filters, for example, between the buffer tank 23 and the second pump 25 ,

2 schematically illustrates a first fuel tank 1 a fuel supply arrangement 1 according to some embodiments. In the illustrated embodiments, the first pump 13 and the fuel tank 15 on the first fuel tank 5 arranged. The fuel supply arrangement 1 further comprises a tank module 24 , where the first pump 13 , the fuel tank 15 and the buffer tank 23 in the tank module 24 are arranged. This will be a fuel supply arrangement 1 provided a service and maintenance of the fuel supply system 1 facilitated. In further embodiments, the fuel tank 15 under the first tank 5 be arranged, for. B. under the tank module 24 ,

The fuel supply arrangement 1 according to the in 1 illustrated embodiment further comprises a fuel level monitoring unit 29 , which is arranged to a fuel level in the buffer tank 23 to monitor. The fuel supply arrangement 1 further includes one with the fuel level monitoring unit 29 and the first pump 13 connected control unit 31 , The control unit 31 is set up by controlling the pumping of the first pump 13 based on the fuel level in the buffer tank 23 from the fuel level monitor 29 is monitored, the fuel level in the buffer tank 23 above a predetermined threshold. This will be in the buffer tank 23 a sufficient fuel level ensured and a suction of air of the second pump 25 can be prevented. As mentioned, the first pump 13 set up to fuel out of the buffer tank 23 to pump, and the second pump 25 is set to fuel out of the buffer tank 23 to pump. Furthermore, as shown, the control unit 31 also with the second pump 25 connected and configured to control their pumps. The control unit 31 can be a pump of the first pump 13 based on pumping the second pump 25 control the fuel level in the buffer tank 23 above a predetermined threshold, and may supplement such control based on the monitored fuel level in the buffer tank 23 ,

The fuel supply arrangement 1 further comprises a first valve 33 , a second valve 35 and a third valve 36 , The first valve 33 is at the first fuel tank connection 7 of the first fuel tank 5 arranged and is adapted to fluid communication through the first fuel tank connection 7 to close if a fuel level in the first fuel tank 5 is below a threshold. The second valve 35 is at the second fuel tank connection 11 of the second fuel tank 9 arranged and is adapted to fluid communication through the second fuel tank connection 11 if there is a fuel level in the second fuel tank 9 is below a threshold. The third valve 36 is at the third fuel tank connection 12 of the third fuel tank 10 arranged and is adapted to a fluid connection through the third fuel tank connection 12 to close if a fuel level in the third fuel tank 10 is below a threshold. Accordingly, the fuel tanks 5 . 9 . 10 a valve 33 . 35 . 36 each at the associated fuel tank connection 7 . 11 . 12 which is arranged to close a fluid connection through it, if the fuel level in the fuel tank 5 . 9 . 10 is below a threshold. Thus, in embodiments where the fuel supply assembly 1 more than three fuel tanks, for example five fuel tanks, each of the five fuel tanks includes a valve at the fuel tank port configured to close fluid communication therethrough if the fuel level in the corresponding fuel tank is below a threshold value. This will cause a suction of air through the first pump 13 prevented.

3a schematically shows a first valve 33 according to some embodiments in an open position. 3b schematically shows the in 3a reproduced first valve 33 in a closed position. This in 1 illustrated second and third valve 35 . 36 can be of the same valve type with the design of the valve, as in 3a and 3b shown. In such embodiments, therefore, the in 3a and 3b illustrated valve 33 also the second and / or third valve 35 . 36 represent. The first valve 33 has an electric drive 37 , a valve body 39 and a valve seat 41 , The electric drive 37 is with the valve body 39 connected and arranged to the position of the valve body 39 with respect to the valve seat 41 between an in 3a shown open position and a in 3b shown closed position to a fluid connection through the first fuel tank connection 7 to control.

The electric drive 37 may be an electromechanical drive such as an electromagnet. According to the illustrated embodiments, the valve seat 41 frustoconical and a surface 53 of the valve body 39 , which is arranged against the valve seat 41 to push is convex. This reduces the risk of any particles in the fuel between the valve body 39 and the valve seat 41 be trapped and thereby a complete closing of the valve 33 hinder. In addition, a larger cross section between the valve body 39 and the valve seat 41 at a shorter stroke of the drive 37 provided. This allows a lower flow resistance through the valve 33 using an electric drive 37 be reached with a short stroke. In the illustrated embodiments, the valve body 39 dome-shaped. However, the valve body can 39 have a different shape, such as a figure, at least the area 53 of the valve body 39 for abutment against the valve seat 41 is arranged, convex. In other embodiments, the valve seat 41 be convex and a surface 53 of the valve body 39 for abutment against the valve seat 41 is arranged, may be frustoconical. Although it may be more difficult to manufacture, the same benefits can be achieved with such a valve.

The valve 33 includes a separation compartment 55 passing through partitions 56 and a sieve 58 in an upper area of the separation compartment 55 is formed. The sieve 58 has a plurality of openings arranged to allow fuel flow from the fuel tank through the screen 58 in the separation compartment 55 to allow. The sieve 58 can also act as a fuel filter that prevents particles above a certain size from entering the separation compartment 55 enter. A valve 33 with the separation compartment 55 as in 3a and 3b is shown at the bottom of in 1 illustrated, corresponding fuel tanks 5 . 9 . 10 arranged.

According to the in 3a and 3b illustrated embodiments, the valve includes 33 a float and a switch 45 , The swimmer 43 is with the switch 45 connected and arranged the switch 45 if there is a fuel level in the fuel tank 5 . 9 is below a threshold. In the illustrated embodiments, the threshold is determined based on a height of the partitions 56 and the size of the fuel tank. That is, when the fuel level in one of the fuel tanks falls below the threshold, e.g. B. under an upper edge of the partitions 56 , the float will sink and the switch 45 Press when the fuel is in the separation compartment 55 through the tank connection 7 is pumped out of the separation compartment. The electric drive 37 is with the switch 45 connected and arranged, upon actuation of the switch 45 the position of the valve body 39 from the in 3a reproduced open position the in 3b to control reproduced closed position.

As in 1 shown is the first valve 33 in the first fuel tank 5 arranged, the second valve 35 is in the second fuel tank 9 arranged and the third valve 36 is in the third fuel tank 10 arranged. Thus, when the fuel level in one of the fuel tanks drops below the threshold, the float will descend and actuate the switch and the electric drive will control the position of the valve body to the closed position. This is a suction of air in the first pump 13 prevented.

According to the in 1 illustrated embodiment, the fuel supply arrangement 1 furthermore a control unit 31 connected to the electric drives of the associated valve 33 . 35 . 36 the corresponding fuel tank 5 . 9 . 10 is connected, which in the illustrated embodiment, the first valve 33 , the second valve 35 and the third valve 36 are. According to the in 1 illustrated embodiment, the first fuel tank 5 a fuel tank inlet 47 on that with a filler cap 49 is provided, which at the fuel tank inlet 47 is arranged movable between an open position and a closed position. The fuel supply arrangement 1 includes one with the control unit 31 connected sensor 51 , where the sensor 51 arranged to the position of the filler cap 49 capture. The control unit 31 is designed to, if the filler cap 49 is moved into the open position, all of the valves, ie in the illustrated embodiments, the first valve 33 , the second valve 35 and the third valve 36 , which are in a closed position to control in an open position. This will when filling the first tank 5 the fuel through the first tank connection 7 through the fuel tank 15 in the other fuel tanks 9 . 10 flow. Accordingly, a user can due to this arrangement, all fuel tanks 5 . 9 . 10 simply by filling the first tank 5 fill up. Accordingly, a fuel supply arrangement 1 with several fuel tanks 5 . 9 . 10 and the above-described advantages of preventing the suction of air and / or water into the fuel pumps 13 . 25 provided, which is easy to fill up at the same time.

According to the in 1 illustrated embodiment, the first fuel tank 5 the fuel tank connection 47 That with the fuel filler cap 49 is provided. However, according to other embodiments, one of the other fuel tanks 9 . 10 the one with the filler cap 49 equipped fuel tank inlet 47 respectively. In the in 1 illustrated embodiment is the filler neck cover 49 represented as a filler neck cap. However, according to other embodiments, the filler neck cover 49 an inner lid within the fuel tank inlet 47 in the fuel tank inlet 47 is arranged movable between an open position and a closed position. In such embodiments, the sensor is 51 thus arranged to detect the position of the inner lid.

The control unit 31 may comprise a computing unit which may take the form of substantially any suitable type of processor circuit or microcomputer, e.g. A digital signal processing (DSP) circuit, a central processing unit (CPU), a processing unit, a processor, an application specific integrated circuit (ASIC), a microprocessor, or other processing logic that can interpret and execute instructions. The term "calculation unit" used herein may represent a processing circuit having a plurality of processing circuits, such as any, some or all of the above. The control unit 31 can one with a calculation unit of the control unit 31 connected storage unit, which supplies the calculation unit with, for example, the stored program code and / or stored data, which the calculation unit needs to perform calculations.

Control systems in modern vehicles generally include a communication bus system that consists of one or more communication buses for connecting a number of electronic control units (ECUs) or controllers to various components on board the vehicle. Such a control system may include a large number of control units, and care of a particular function may be shared between two or more of them. Vehicles of the type in question are therefore often equipped with considerably more control units than in 1 As experts in this field certainly know.

4 represents a land-bound vehicle 3 with an internal combustion engine 57 and a fuel supply arrangement 1 according to some embodiments. The fuel supply assembly 1 is set to the internal combustion engine 57 of the land-bound vehicle 3 To supply fuel. The internal combustion engine 57 can be a diesel engine or a gasoline engine. This in 4 illustrated vehicle 3 is a truck. However, the provided fuel supply arrangement 1 be adapted to a combustion engine 57 supplying fuel to another type of manned or unmanned vehicle for land-based transportation, such as a truck, a construction vehicle, a tractor, a car, etc.

It should be understood that the foregoing is illustrative of various embodiments and that the invention is only defined by the appended claims. One skilled in the art will recognize that the embodiments may be modified and that various features of the embodiments may be combined to create other than the embodiments described herein without departing from the scope of the present invention as defined by the appended claims.

As used herein, the term "comprising" or "comprising" is open and includes one or more specified features, elements, steps, components, or functions, but does not preclude the presence or addition of one or more other features, elements, steps, components, Functions or groups of the same.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• WO 2013/0384018 A1 [0003]

Claims (12)

A fuel supply arrangement (1) for a land vehicle (3), comprising: - a first fuel tank (5) with a first fuel tank connection (7), - at least one second fuel tank (9) with a second fuel tank connection (11), - a first pump ( 13), and a fuel tank (15) having an outlet (17), a first inlet (19) and at least a second inlet (21), the first inlet (19) fluidly connected to the first fuel tank port (7) the second inlet (21) is fluidly connected to the second fuel tank port (11), the first pump (13) fluidly connected to the outlet (17) of the fuel tank (15), and wherein the first pump (13) is adapted thereto To pump fuel from the first fuel tank (5) and the at least second fuel tank (9) through the fuel tank (15), characterized in that the supply arrangement (1) further comprises a first valve (33) and at least one second valve (35), wherein the first valve (33) is adapted to close fluid communication through the first fuel tank port (7) if a fuel level in the first fuel tank (5) is below a threshold value; at least one second valve (35) is arranged to close a fluid connection through the second fuel tank connection (11) if a fuel level in the second fuel tank (9) is below a threshold value. Fuel supply arrangement according to Claim 1 wherein the first pump (13) and the fuel tank (15) are arranged on the first fuel tank (5). Fuel supply arrangement (1) according to Claim 1 or 2 , further comprising a buffer tank (23), wherein the first pump (13) is adapted to pump fuel from the first fuel tank (5) and the at least second fuel tank (9) into the buffer tank (23). Fuel supply arrangement (1) according to Claim 3 , further comprising a tank module (24), wherein the first pump (13), the fuel tank (15) and the buffer tank (23) are arranged in the tank module (24). Fuel supply arrangement (1) according to Claim 3 or 4 , further comprising a second pump (25) arranged to pump fuel from the buffer tank (23) to a high pressure pump (27) of the land vehicle (3). Fuel supply arrangement (1) according to one of Claims 3 to 5 , further comprising a fuel level monitoring unit (29) arranged to monitor a fuel level in the buffer tank (23), the assembly (1) further comprising a control unit (31) connected to the fuel level monitoring unit (29) and the first pump (13) ), wherein the control unit (31) is adapted to maintain the fuel level in the buffer tank (23) above a predetermined threshold value by controlling the pumping of the first pump (13). Fuel supply arrangement (1) according to one of the preceding claims, wherein the first valve (33) and the at least second valve (35) each have an electric drive (37), a valve body (39) and a valve seat (41), and wherein the electric drive ( 37) is connected to the valve body (39) and arranged to control the position of the valve body (39) with respect to the valve seat (41) between an open position and a closed position to provide fluid communication through the associated first and at least second fuel tank ports (7, 11). Fuel supply arrangement (1) according to Claim 7 wherein the first valve (33) is disposed in the first fuel tank (5) and the at least second valve (35) is disposed in the at least second fuel tank (9), the first valve (33) and the at least second valve (35 ) each having a float (43) and a switch (45), the float (43) connected to the switch (45) and arranged to operate the switch (45) if a fuel level in the fuel tank (5, 9 ) is below a threshold, and wherein the electric drive (37) is connected to the switch (45) and arranged to control the position of the valve body (39) in the closed position upon actuation of the switch (45). Fuel supply arrangement (1) according to Claim 7 or 8th wherein the assembly (1) further comprises a control unit (31) connected to the electric drives (37) of the first valve (33) and the at least second valve (35), wherein the first fuel tank (5) or the at least second fuel tank (9 ) having a fuel tank inlet (47) provided with a filler cap (49) movably disposed at the fuel tank inlet (47) between an open position and a closed position, the assembly (1) further comprising a sensor connected to the control unit (31) (51), wherein the sensor (51) is arranged to detect the position of the filler cap (49), and wherein the control unit (31) is adapted, if the filler cap (49) is moved to the open position, the first and to control the at least second valve (33, 35), which are in a closed position, into an open position. Fuel supply arrangement (1) according to Claim 7 to 9 wherein the valve seat (41) is frusto-conical and wherein a surface (53) of the valve body (39) disposed for abutment with the valve seat (41) is convex. A fuel supply assembly (1) according to any one of the preceding claims, wherein each fuel tank (5, 9) comprises a separation compartment (55) located at a bottom of the corresponding fuel tank (5, 9), and each valve (33, 35) in an associated separation compartment (55) is arranged. Land-bound vehicle (3) having an internal combustion engine (57) and a fuel supply arrangement (1) according to one of the preceding claims, wherein the fuel supply arrangement (1) is adapted to supply fuel to the internal combustion engine (57) of the land-based vehicle (3).

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