DE102017007403A1 - Saddle tank and vehicle with a saddle tank - Google Patents

Abstract

The invention relates to a saddle tank (1) having a first fuel chamber (1.1) and a second fuel chamber (1.2), wherein the first and second fuel chambers (1.1, 1.2) are interconnected via an overflow (1.3) and in the first fuel chamber (1.1 ) A fuel pump (2) is arranged. According to the invention, it is provided that the second fuel chamber (1.2) is designed with a discharge opening (1.21) arranged in the region of the chamber bottom (1.20), the first fuel chamber (1.1) with an inflow opening (1.11), and the discharge opening (1.21 ) of the second fuel chamber (1.2) by means of a fuel line (1.4) with the inflow opening (1.11) of the first fuel chamber (1.1) is connected, wherein the formation of a gradient in the direction of the first fuel chamber (1.1) the outflow opening (1.21) with respect Operating position of the saddle tank (1) is higher-ordered than the inflow opening (1.11) of the first fuel chamber (1.1).

Description

The invention relates to a saddle tank according to the preamble of claim 1. Furthermore, the invention relates to a vehicle with a saddle tank according to the invention.

It is known, in particular in four-wheel drive vehicles, to use so-called saddle tanks as fuel tanks, which consist of a saddle-bag-like construction consisting of two fuel chambers which are connected to one another via an overflow. Thus, vehicle components, such as, for example, a cardan shaft and / or an exhaust system can be arranged between these two fuel chambers. Such a saddle tank is, for example, from the DE 10 2005 060 726 A1 known.

In one of the two fuel chambers of the saddle tank, a fuel delivery pump is installed, with which the fuel is pumped from this fuel chamber to the engine of the vehicle. In the other fuel chamber of the tank, a suction jet pump is usually positioned, with which fuel is continuously conveyed into the fuel chamber with the fuel delivery pump. In addition to the cost of such a suction jet pump whose energy consumption is disadvantageous because of the permanent operation.

It is an object of the invention to provide a saddle tank of the type mentioned, with which the disadvantages associated with the use of a suction jet pump can be avoided. It is another object of the invention to provide a vehicle with such a saddle tank.

The first object is achieved by a saddle tank with the features of claim 1, the second-mentioned object by a vehicle having the features of claim 8.

• - die zweite Kraftstoffkammer mit einer im Bereich des Kammerbodens angeordneten Abflussöffnung ausgebildet ist,
• - die erste Kraftstoffkammer mit einer Zuflussöffnung ausgebildet ist, und
• - die Abflussöffnung der zweiten Kraftstoffkammer mittels einer Kraftstoffleitung mit der Zuflussöffnung der ersten Kraftstoffkammer verbunden ist, wobei zur Bildung eines Gefälles in Richtung der ersten Kraftstoffkammer die Abflussöffnung in Bezug auf die Gebrauchslage des Satteltanks höher angeordnet ist als die Zuflussöffnung der ersten Kraftstoffkammer.

The saddle tank according to the invention with a first fuel chamber and a second fuel chamber, in which the first and second fuel chambers are connected to each other via an overflow and in the first fuel chamber, a fuel delivery pump is arranged according to the invention characterized in that

• - The second fuel chamber is formed with a arranged in the region of the chamber bottom drain opening,
• - The first fuel chamber is formed with an inlet opening, and
• - The outlet opening of the second fuel chamber is connected by means of a fuel line to the inlet opening of the first fuel chamber, wherein the drain opening with respect to the position of use of the saddle tank is arranged higher than the inflow opening of the first fuel chamber to form a gradient in the direction of the first fuel chamber.

In such a saddle tank according to the invention, the fuel is conveyed from the second fuel chamber via the fuel line into the first fuel chamber. For this purpose, the region of the chamber bottom with the outflow opening is arranged higher than the inflow opening of the first fuel chamber, whereby a gradient in the direction of the first fuel chamber is formed and thereby the fuel from the second fuel chamber can flow without the aid of a pump in the first fuel chamber. Compared to a saddle tank according to the prior art therefore eliminates the use of a suction jet pump or other pump.

In order to keep the design effort for the saddle tank low, the inflow opening in the region of the chamber bottom of the first fuel chamber is arranged. In addition, the area between the two fuel chambers remains free and can therefore be used in the manner known from the prior art for the accommodation of vehicle components, such as a propeller shaft and the exhaust system.

In order to ensure a safe and complete flow of the fuel from the second fuel chamber into the first fuel chamber, the chamber bottom of the second fuel chamber is funnel-shaped with a funnel opening as a drain opening.

In order to keep the fuel line as short as possible, it makes sense to arrange the outflow opening of the second fuel chamber in a region facing the first fuel chamber. Preferably, it then also advantageous to arrange the inflow opening of the first fuel chamber in a region facing the second fuel chamber.

A structurally simple design of the first fuel chamber ensured by the fact that the bottom portion of the first fuel chamber is formed as a horizontal chamber bottom.

Finally, it is particularly advantageous if the fuel line is detachably connected to the discharge opening and the inflow opening.

The saddle tank according to the invention is suitable for use in all vehicle types, in particular in all-wheel drive vehicles.

• 1 ein Fahrzeug mit einem erfindungsgemäßen Satteltank in einer Draufsicht, und
• 2 eine schematische Darstellung des Satteltanks nach 1 in einer Schnittansicht gemäß Schnitt A-A.

Further advantages, features and details of the invention will become apparent from the claims, the following description of preferred embodiments and with reference to the drawings. Showing:

• 1 a vehicle with a saddle tank according to the invention in a plan view, and
• 2 a schematic representation of the saddle tank after 1 in a sectional view along section AA.

This in 1 illustrated vehicle 10 has a plan view of a saddle tank shown schematically 1 in the rear area. 2 shows this saddle tank 1 as section AA according to 1 ,

After that there is the saddle tank 1 from a first fuel chamber 1.1 with a fuel pump 2 and a second fuel chamber spaced apart in the vehicle transverse direction (y-direction) 1.2 , these two fuel chambers 1.1 and 1.2 in each case in their upper regions relative to the vehicle vertical direction (z-direction) with an overflow 1.3 are connected. This forms the two fuel chambers 1.1 and 1.2 along with the overflow 1.3 a saddle-pocket-like contour. The between the two fuel chambers 1.1 and 1.2 along with the overflow 1.3 formed space R serves to accommodate vehicle components, namely an exhaust system 11 and a cardan shaft 12 ,

With the fuel pump 2 will fuel from the first fuel chamber 1.1 to the engine of the vehicle 10 pumped.

To ensure that the fuel from the second fuel chamber 1.2 completely in the first fuel chamber 1.1 can drain, connects a fuel line 1.4 one in the area of the chamber floor 1.20 the second fuel chamber 1.2 arranged drain opening 1.21 with one in the area of the chamber floor 1.10 arranged inflow opening 1.11 the first fuel chamber 1.1 ,

A corresponding gradient of the fuel line 1.4 is achieved by that the drain opening 1.21 the second fuel chamber 1.2 in the vehicle vertical direction (z-direction) is higher than the inflow opening 1.11 the first fuel chamber 1.1 , Here, the directional taxes refer to the position of use of the saddle tank 1 in the vehicle 10 with its reference system.

To completely drain the fuel from the second fuel chamber 1.2 over the fuel line 1.4 in the first fuel chamber 1.1 ensure is the chamber floor 1.20 this second fuel chamber 1.2 geometrically designed so that the fuel in the area of the drain opening 1.21 can collect. To 2 is the chamber floor 1.20 Funnel-shaped, so that the chamber floor 1.20 along with one to the first fuel chamber 1.1 adjacent chamber wall 1.22 forms a funnel shape, leaving the drain opening 1.21 represents the associated funnel opening and a lowest level E2 the second fuel chamber 1.2 forms. This is off 2 to realize that the chamber floor 1.20 in the vehicle transverse direction (y-direction) to the chamber wall 1.22 is inclined down.

The chamber floor 1.10 the first fuel chamber 1.1 runs horizontally and forms a lowest level E1 the first fuel chamber 1.1 in relation to the vehicle vertical direction. For setting a gradient in the fuel line 1.4 with an angle α is the lowest or lowest level E2 the second fuel chamber 1.2 by an amount a higher than the lowest or lowest level E2 the first fuel chamber 1.1 ,

To get the shortest possible fuel line 1.4 to realize is according to 2 the drain opening 1.21 in the area B2 to the first fuel chamber 1.1 adjacent chamber wall 1.22 arranged and vice versa is also the inflow opening 1.11 in the area B1 one to the second fuel chamber 1.2 adjacent chamber wall 1.12 arranged. This will be the two fuel chambers 1.1 and 1.2 over their deepest areas B1 and B2 connected without the gap R between the two fuel chambers 1.1 and 1.2 for the installation of the exhaust system 11 and the cardan shaft 12 would be hampered.

The fuel line 1.4 each becomes detachable and liquid-tight with the drainage opening 1.21 and the inflow opening 1.11 connected. This must be in the case of customer service, for example. When replacing the exhaust system 11 or the cardan shaft 12 the saddle tank 1 not be dismantled, but only the fuel line 1.4 ,

LIST OF REFERENCE NUMBERS

1

Saddle tank of the vehicle 10

1.1

first fuel chamber of the saddle tank 1

1.10

Chamber bottom of the first fuel chamber 1.1

1.11

Inflow opening of the first fuel chamber 1.1

1.2

second fuel chamber of the saddle tank 1

1.20

Chamber bottom of the second fuel chamber 1.2

1.21

Outflow opening of the second fuel chamber 1.2

1.3

Overflow of the saddle tank 1

1.4

Fuel line

2

Fuel pump

10

vehicle

11

Exhaust system of the vehicle 10

12

Propshaft of the vehicle 10

B1

Area of the first fuel chamber 1.1

B2

Area of the second fuel chamber 1.2

R

Space between the two fuel chamber 1.1 and 1 .2

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

• DE 102005060726 A1 [0002]

Claims (8)

Saddle tank (1) with a first fuel chamber (1.1) and a second fuel chamber (1.2), wherein the first and second fuel chambers (1.1, 1.2) via an overflow (1.3) are interconnected and in the first fuel chamber (1.1) a fuel pump ( 2), characterized in that - the second fuel chamber (1.2) is formed with a discharge opening (1.21) arranged in the region of the chamber bottom (1.20), - the first fuel chamber (1.1) is formed with an inflow opening (1.11), and - The outlet opening (1.21) of the second fuel chamber (1.2) by means of a fuel line (1.4) to the inlet opening (1.11) of the first fuel chamber (1.1) is connected, wherein the formation of a gradient in the direction of the first fuel chamber (1.1), the drain opening (1.21 ) with respect to the position of use of the saddle tank (1) is arranged higher than the inflow opening (1.11) of the first fuel chamber (1.1). Saddle tank (1) to Claim 1 , characterized in that the inflow opening (1.11) in the region of the chamber bottom (1.10) of the first fuel chamber (1.1) is arranged. Saddle tank (1) to Claim 1 or 2 , characterized in that the chamber bottom (1.20) of the second fuel chamber (1.2) funnel-shaped with a funnel opening as a drain opening (1.21) is formed. Saddle tank (1) according to one of the preceding claims, characterized in that the outflow opening (1.21) of the second fuel chamber (1.2) in one of the first fuel chamber (1.1) facing region (B2) is arranged. Saddle tank (1) according to one of the preceding claims, characterized in that the inflow opening (1.11) of the first fuel chamber (1.1) in a second fuel chamber (1.2) facing region (B1) is arranged. Saddle tank (1) according to one of the preceding claims, characterized in that the bottom region (1.10) of the first fuel chamber (1.1) is formed as a horizontal chamber bottom. Saddle tank (1) according to one of the preceding claims, characterized in that the fuel line (1.4) is releasably connected to the discharge opening (1.21) and the inflow opening (1.11). Vehicle (10) with a saddle tank (1) according to one of the preceding claims.

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