• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Motor vehicle tank system having a first volume (1) for receiving fuel and a second volume (2) for receiving a reducing agent, especially an aqueous solution of urea. The second volume (2) is housed in the first volume (1) separated therefrom by a peripheral inner wall (3) of the reservoir, formed in the bottom side wall t (4) of the reservoir and defining an opening ( 5) of the second volume (2) which is closed by a cover (6).
    公开号:FR3020997A1
    申请号:FR1554305
    申请日:2015-05-13
    公开日:2015-11-20
    发明作者:Rainer Haeberer
    申请人:Robert Bosch GmbH；
    IPC主号:
    专利说明:

    [0001] Field of the Invention The present invention relates to a motor vehicle tank system having a first volume for receiving fuel and a second volume for receiving a reducing agent, especially an aqueous solution of urea, the second volume being housed in the first volume being separated therefrom by a peripheral inner wall of the tank. State of the art DE 10 2009 000 094 A1 discloses a metering system for introducing reducing agent into the exhaust gas duct of an internal combustion engine. This metering system comprises a reservoir receiving the reducing agent. The tank capacity of mainly cylindrical shape, is of the order of 2 to 10 liters. To reduce the manufacturing cost, the tank is a unique tank that can be integrated into the fuel tank to optimize the bulk. The reducing agent reservoir engages for this purpose in an orifice, upper side, of the fuel tank or in a convex part of the closed outer skin of the fuel tank. This document proposes forming the reducing agent reservoir in the skin of the fuel tank. The integration of the reducing agent reservoir into the fuel tank has the advantage that the heated fuel returning to the fuel tank via the fuel return circuit serves to heat the reducing agent. Heating the reducing agent prevents it from freezing at low outside temperatures. Generally, a heating element is incorporated in the reducing agent tank, which however is omitted if the reducing agent tank is integrated in the fuel tank. OBJECT OF THE INVENTION The object of the present invention is to develop this state of the art and in particular to realize a system of tanks offering the advantages of integrating the technical agent tank into the fuel tank while still using them. better. The invention also aims to develop a reservoir system that facilitates the service, that is to say the replacement of defective components.
    [0002] DESCRIPTION AND ADVANTAGES OF THE INVENTION To this end, the subject of the invention is a tank system of the type defined above, characterized in that the peripheral inner wall of the tank is formed in the bottom side wall of the tank. see and she has a bottom opening of the second volume which is closed by a lid. In other words, the reservoir system according to the invention comprises a first volume receiving the fuel and a second volume receiving the reducing agent which is in particular an aqueous solution of urea. The second volume is housed in the first volume being separated therefrom by a peripheral inner wall of the reservoir. According to the invention, the inner peripheral wall of the tank is formed in the bottom side wall of the tank and has an opening or port on the bottom side of the second volume closed by a lid. The separation of the two volumes is thus done by a partition wall or common partition. The common partition facilitates the exchange of heat between the heated fuel on one side of the wall or partition to the reducing agent on the other side of the partition. In addition, the common partition guarantees the separation of fluids from the two volumes, which eliminates the additional sealing elements. As the common partition is a peripheral inner partition, that is to say, housed entirely in the first volume, it is embedded by the fuel over its entire peripheral zone, which improves the heat exchange.
    [0003] The bottom opening of the second volume closed by the lid can be removed because the lid is removably attached to the wall of the bottom of the tank in a simple manner to replace the components housed in the second volume receiving the agent. reducer. These components are for example the filter, the heating element or other component. This improves the serviceability of the tank system. The tank system according to the invention can be manufactured by a method of forming / blowing plastics material or plastic injection molding. Several pieces are preferably welded or screwed to each other. Welding has the advantage of making unnecessary any additional joints in the junction area. The second volume receiving the reducing agent preferably has a capacity of two to fifteen liters.
    [0004] According to another preferred feature, the second volume is eccentrically installed in the first volume so that the first volume is subdivided by the second volume into partial volumes of different sizes. The subdivision into volumes of different sizes has the advantage of being able to direct the heated fuel back, in a targeted manner to the small partial volume. Thus, the heated fuel mixes less with the fuel already in the first volume and allows more heat to be exchanged with the reducing agent of the second volume. These volume parts of different capacities are preferably connected by at least one gap between the inner peripheral wall of the reservoir and its outer wall. The connection of the volume parts guarantees the exchange of fuel, but the size of the gap is nevertheless chosen sufficiently small to slow this exchange. According to a preferred development of the invention, the inner peripheral wall of the reservoir has at least one protrusion which extends inside the first volume. This outgrowth can provide several functions. Preferably, there are several excrescences of different shapes. Preferably, the protrusion increases the surface of the inner wall of the reservoir. The protrusion may occupy the entire periphery of the inner wall of the reservoir. For example, the inner wall of the tank may have a wavy shape. Increasing the surface of the inner wall of the tank improves the heat exchange between the fuel and the reducing agent. According to another preferred feature, there is provided at least one protrusion which gives the inner wall of the reservoir a certain elasticity so that if the reducing agent freezes, the inner wall of the reservoir may yield under the pressure of the ice. In addition, there is provided an outgrowth of the inner wall of the reservoir which enters the small portion of the first volume.
    [0005] Since it is preferably the portion of volume that receives the heated fuel from the fuel return in a targeted manner, this outgrowth increases the heat transfer surface (heat conduction surface) by the same amount. Preferably, the protrusion which extends in the small portion of the first volume for the inner wall of the reservoir joins the bottom side wall and constitutes a housing receiving the filter element. The housing is thus accessible by opening the bottom which simplifies the exchange of the filter element. The filter element is preferably annular. In this case, the housing receiving the filter element has substantially a cylindrical shape. The filter element is preferably applied directly against the inner wall of the reservoir, at least in the region of the protuberance, ensuring an optimum exchange of heat by the inner wall of the reservoir, preventing the reducing agent in the filter from risking no freezing or that the already frozen reducing agent thaws rapidly. According to a development of the invention, the filter element is applied against the inner wall of the reservoir and under prestressing produced by an adapter releasably connected to the cover.
    [0006] The adapter thus releasably connected to the lid simplifies the replacement of the filter element if necessary because it is not necessary to remove the entire cover, but only the adapter or to detach it. In addition, the adapter allows to exert a prestress on the filter element which produces at the same time the force ensuring the seal and avoiding the migration of liquid under the filter element. Advantageously, at least one seal is provided between the filter element and the inner wall of the reservoir and / or between the filter element and the adapter, which improves the sealing. To detach the adapter from the cover if necessary, it is proposed to mechanically connect the adapter, preferably by screws to the cover. To seal the connection, at least one seal is interposed between the adapter and the cover. The seal is made and arranged to abut in the radial or axial gap between the adapter and the cover.
    [0007] Advantageously, the inner wall of the reservoir forms a recess in the inner wall of the reservoir in the region of the protrusion forming the housing of the filter element. The fuel accumulates in this sink so that even if the fuel level is low, the fuel will provide some protection function. Preferably, the recess has a bottom region that enters the end of the ring-shaped filter element opposite the adapter. Thus the position of the filter element is blocked in the radial direction. At the same time, the contact area between the filter element and the inner wall of the tank is increased, which has an advantageous effect on the heat exchange to be obtained. According to one development, the heating element for heating the reducing agent is in the second volume. In cold climatic zones, the heating element must ensure in particular that the reducing agent does not freeze or thaws rapidly. The risk of frost is also accentuated in certain climate zones, for example if the vehicle is often used in urban traffic, because then the fuel injection pressure is too low so that the fuel that returns to the tank system by the fuel return will not be sufficiently warmed up. In addition, a level of fuel filling in the tank system has an adverse effect. Preferably, the heating element housed in the adapter or on it thus ensures that the reducing agent in the filter element will not freeze or thaw rapidly. In addition, the removable attachment of the adapter to the lid allows for easy maintenance and replacement of the heating element. Preferably, the lid or adapter includes a suction port for withdrawing the reducing agent. The suction orifice also opens, preferably, into the suction chamber surrounded by the filter element. The filter element thus ensures that no dirt particles arrive in the suction chamber or in the suction port.
    [0008] According to another preferred feature, the suction chamber is delimited at the top by the bottom region of the depression which penetrates into the filter element and which is part of the inner wall of the tank so that the heated fuel accumulates poured in the depression avoids the freezing of the reducing agent in the suction chamber or allows to quickly thaw this reducing agent, if it is already frozen. Alternatively or additionally, the adapter may include a heating element to accelerate the eventual thaw process.
    [0009] The achievements developed above show that the protuberance of the inner wall of the reservoir which comes into the small part of the first volume offers a large number of advantages, in particular to protect particularly critical zones or components, such as for example the area of the suction port and / or the filter element. In addition, the tank system according to the invention is particularly easy to maintain because the bottom hole allows easy access to components requiring frequent maintenance and if necessary to replace them quickly and simply. For the filling and / or evacuation of the volume receiving the reducing agent, it is proposed that the inner peripheral wall at its end opposite the bottom side orifice joins the outer wall of the reservoir provided. at least one orifice. The filling and / or evacuation of air of the second volume is thus preferably from above.
    [0010] Drawings The present invention will be described hereinafter in more detail with the aid of an embodiment of a tank system, shown in the accompanying drawings, in which: FIG. 1 is a schematic longitudinal section of the system of 2 is a schematic section of the tank system of FIG. 1 and FIG. 3 is an enlarged detail of the region of the outgrowth of the inner wall of the tank used to separate two tanks. FIG. volumes according to Figure 1.
    [0011] DETAILED DESCRIPTION OF EMBODIMENTS FIG. 1 shows a tank system having a first volume 1 for receiving fuel and a second volume 2 for receiving a reducing agent. The second volume 2 is housed completely in the first volume 1; the inner peripheral wall 3 of the reservoir separates the two volumes 1, 2 from one another. By housing the second volume 2 in the first volume 1, the first volume 1 is subdivided into two volume parts 1.1, 1.2 connected between the two. sides of the volume 2 between the inner tank wall 3 and the outer tank wall 8 by the gap 7 thus formed (see Figure 2). The arrangement of the second volume 2 in the first volume 1 is eccentric so that the volume part 1.1 is significantly smaller than the volume part 1.2. A nozzle 26 is used to return heated fuel from the fuel return in the small volume portion 1.1.
    [0012] As the two volume parts 1.1, 1.2 are connected by gap 7, the fuel level is the same in both volume parts 1.1, 1.2. But, for the same level, the volume part 1.1 contains much less fuel than the volume part 1.2 so that the heated fuel arriving through the nozzle 26 in the volume part 1.1 is less strongly mixed and so this fuel will be less cooled. The fuel contained in the volume part 1.1 can thus be used to heat the reducing agent of the volume 2 so that at low outside temperatures this reducing agent does not freeze or to thaw more quickly. The inner wall of reservoir 3 thus constitutes a heat transfer surface. To optimize the heat transfer, the inner wall of tank 3 has protuberances 9, 10 which extend into volume 1. The peripheral protrusion 10 increases the heat transfer surface. In addition, it gives a certain flexibility to the inner wall 3 in the case where the reducing agent volume 2 freeze and exert a thrust on the wall 3. But the protrusion 9, on the other hand, is not peripheral; it extends only in the small portion of volume 1.1, that is to say in the "warmer zone" of the first volume 1. The protrusion 9 forms a housing 11 receiving a filter element 12 of annular shape . The annular filter element 12 receives an adapter 13 secured by screws 16 to the lid 6 to close the bottom-side opening (see FIG. 3). The opening 5 of the bottom is defined by the inner wall 3 of the reservoir which joins in the region of the opening 5, the bottom wall 4 of the reservoir. The adapter 13 carries an annular sealing member 17 which seals the radial gap between the adapter 13 and the cover 6. The enlarged representation of FIG. 3 further shows that the adapter 13 is made in the form of a hollow body and constitutes a suction opening 21 opening into a suction chamber 22 delimited by the filter element 12. In addition, the adapter 13 has a stepped outer contour to form annular shoulders which serve as a bearing surface. The adapter 13 bears against the cover 6 by a first annular shoulder. A second annular shoulder serves to support the ring-shaped filter element 12 and between this filter element 12 and the adapter there is a first seal 15. Another seal 14 is provided on the opposite front surface of the filter element 12. filter element 12 of annular shape for sealing between this filter element 12 and the inner wall 3 of the reservoir. To increase the seal, the filter element 12 is prestressed axially by the adapter 13 in the direction of the inner wall 3 of the tank. The inner wall 3 of the reservoir has a depression 18 in the region of the filter element 12 with a bottom zone 19 whose front wall penetrates into the annular filter element 12. The radial blocking of the position of the filter element 12 is thus achieved.
    [0013] The depression 18 serves at the same time as a collector for the heated fuel, so that even if the fuel level is low, it is possible to treat the frozen reducing agent in the region of the filter element 12 or the chamber of the fuel. suction 22 and facilitate its quick thaw. As in the embodiment of FIG. 3, it is also possible to provide a heating element 20 which is in this case integrated in the adapter 13. The filling of the volume 2 with the reducing agent is carried out in the tank system represented by the orifice 24 made in the outer wall 23 of the tank. A nozzle may be installed in the port to facilitate the connection of the reducing agent line.
    [0014] The outer wall 23 of the tank further comprises an orifice 25 for evacuating the air from the volume 2. The reservoir system shown is advantageously manufactured by a plastic blowing process or by plastic injection. Several pieces will then preferably be connected by welds. The weld bead 27 required for this purpose, as shown in FIG. 1, is located in the peripheral zone of the outer wall 8 of the tank. 10 NOMENCLATURE OF THE MAIN ELEMENTS 1 First volume receiving the fuel 1.1 Part of the volume 1.2 Part of the volume 2 Second volume receiving a reducing agent 3 Inner wall of the tank 7 Interval 8 Outer wall of the tank 9, 10 Outer bearings 11 Housing 12 Filter element 13 Adapter 14, 15 Seal 16 Screw 17 Annular seal 18 Push-in Heating element 22 Suction chamber 20 23 Tank outer wall 24, 25 Ports 26 Nozzle 27 Welding cord25
    权利要求:
    Claims (2)
    [0001]
    1) A motor vehicle tank system comprising a first volume (1) for receiving fuel and a second volume (2) for receiving a reducing agent, in particular an aqueous solution of urea, the second volume (2) housed in the first volume (1) being separated therefrom by a peripheral inner wall (3) of the reservoir, characterized in that the peripheral inner wall (3) of the reservoir is formed in the bottom-side wall (4) of the reservoir and has a bottom opening (5) of the second volume (2) which is closed by a cover (6).
    [0002]
    2) Tank system according to claim 1, characterized in that the second volume (2) is eccentrically housed in the first volume (1) so that the first volume (1) is subdivided by the second volume (1). - lume (2) in volume parts (1.1, 1.2) of different sizes preferably connected by at least one gap (7) between the peripheral inner wall and the outer peripheral wall (8) of the reservoir. 30) Tank system according to claim 1 or 2, characterized in that the peripheral inner wall (3) of the reservoir has a first protrusion (9, 10) extending in the first volume (1) preferably in the small part (1.1) of the first volume (1). 4 °) Tank system according to claim 3, characterized in that the protrusion (9) joins the bottom side wall (4) of the reservoir and forms a housing (11) receiving a preferably annular filter element (12). . Tank system according to Claim 4, characterized in that the filter element (12) is applied against the inner wall (3) of the prestressed reservoir produced by an adapter (13) connected in a similar manner. removable to the cover (6), and preferably at least one seal (14, 15) is provided between the filter element (12) and the inner wall (3) of the reservoir and / or the filter element (12) and the adapter (13). Tank system according to claim 5, characterized in that the adapter (13) is mechanically fixed preferably by screws (16) to the cover (6) and / or a seal (17) is interposed between the adapter (3) and the cover (6). Tank system according to one of Claims 5 and 6, characterized in that the inner wall (3) of the tank forms a recess (18) in the region of the protrusion (9), and preferably depression (18) has a bottom region (19) which penetrates into the end of the annular filter element (12) which is opposite the adapter (13). 8 °) Tank system according to claim 5, characterized in that a heating element (20) provides heating of the reducing agent in the second volume (2) and the heating element (20) is preferably in or on the adapter (13). Tank system according to Claim 5, characterized in that a suction port (21) is provided in the cover (6) or in the adapter (13), which preferably opens into a suction chamber ( 22) surrounded by the filter element (12). 10 °) tank system according to claim 1, characterized in that the end opposite the orifice (5) of the inner peripheral wall (3) of the tank, joins the outer wall (23) of the tank in which there is at least one orifice (24, 25) for filling and / or evacuating the air of the second volume (2).
    类似技术:
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    同族专利:
    公开号 | 公开日
    FR3020997B1|2019-07-12|
    DE102014209380A1|2015-11-19|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE102009000094A1|2009-01-09|2010-07-15|Robert Bosch Gmbh|Tank for receiving an aqueous solution|DE102017215730A1|2017-09-07|2019-03-07|Bayerische Motoren Werke Aktiengesellschaft|Motor vehicle with a fuel tank and with a second storage container containing a gefriergefährdetes resources|
    DE102017222250A1|2017-12-08|2019-06-13|Bayerische Motoren Werke Aktiengesellschaft|Fuel tank for a motor vehicle, in particular for a motorcycle, and method for producing a fuel tank|
    DE102017223124A1|2017-12-18|2019-06-19|Röchling Automotive SE & Co. KG|Multi-part injection-molded multi-chamber plastic tank with sloping joining surface|
    CN111237104B|2020-03-03|2021-04-02|一汽解放汽车有限公司|Integrated diesel tank|
    法律状态:
    2016-05-23| PLFP| Fee payment|Year of fee payment: 2 |
    2017-05-22| PLFP| Fee payment|Year of fee payment: 3 |
    2018-05-22| PLFP| Fee payment|Year of fee payment: 4 |
    2018-06-22| PLSC| Search report ready|Effective date: 20180622 |
    2019-05-21| PLFP| Fee payment|Year of fee payment: 5 |
    2020-05-19| PLFP| Fee payment|Year of fee payment: 6 |
    2021-05-21| PLFP| Fee payment|Year of fee payment: 7 |
    优先权:
    申请号 | 申请日 | 专利标题
    DE102014209380.5|2014-05-16|
    DE102014209380.5A|DE102014209380A1|2014-05-16|2014-05-16|Tank system for a motor vehicle|
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