CN100406292C - 用于机动车的燃油箱 - Google Patents

用于机动车的燃油箱 Download PDF

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CN100406292C
CN100406292C CNB2004800259612A CN200480025961A CN100406292C CN 100406292 C CN100406292 C CN 100406292C CN B2004800259612 A CNB2004800259612 A CN B2004800259612A CN 200480025961 A CN200480025961 A CN 200480025961A CN 100406292 C CN100406292 C CN 100406292C
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fuel tank
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level sensor
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CN1849232A (zh
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贝恩德·伦普夫
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Continental Automotive GmbH
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0076—Details of the fuel feeding system related to the fuel tank
    • F02M37/0088—Multiple separate fuel tanks or tanks being at least partially partitioned
    • F02M37/0094—Saddle tanks; Tanks having partition walls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B60K15/077—Fuel tanks with means modifying or controlling distribution or motion of fuel, e.g. to prevent noise, surge, splash or fuel starvation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B60K2015/03105—Fuel tanks with supplementary interior tanks inside the fuel tank
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B60K2015/03118—Multiple tanks, i.e. two or more separate tanks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B60K2015/03118—Multiple tanks, i.e. two or more separate tanks
    • B60K2015/03138—Pumping means between the compartments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B60K2015/03118—Multiple tanks, i.e. two or more separate tanks
    • B60K2015/03144—Fluid connections between the tanks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B60K2015/0321—Fuel tanks characterised by special sensors, the mounting thereof
    • B60K2015/03217—Fuel level sensors
    • B60K2015/03223—Fuel level sensors comprising at least two level fuel sensors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D33/00—Controlling delivery of fuel or combustion-air, not otherwise provided for
    • F02D33/003—Controlling the feeding of liquid fuel from storage containers to carburettors or fuel-injection apparatus ; Failure or leakage prevention; Diagnosis or detection of failure; Arrangement of sensors in the fuel system; Electric wiring; Electrostatic discharge
    • F02D33/006—Controlling the feeding of liquid fuel from storage containers to carburettors or fuel-injection apparatus ; Failure or leakage prevention; Diagnosis or detection of failure; Arrangement of sensors in the fuel system; Electric wiring; Electrostatic discharge depending on engine operating conditions, e.g. start, stop or ambient conditions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
    • F02M37/0023—Valves in the fuel supply and return system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0047—Layout or arrangement of systems for feeding fuel
    • F02M37/0052—Details on the fuel return circuit; Arrangement of pressure regulators
    • F02M37/0058—Returnless fuel systems, i.e. the fuel return lines are not entering the fuel tank
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/02—Feeding by means of suction apparatus, e.g. by air flow through carburettors
    • F02M37/025—Feeding by means of a liquid fuel-driven jet pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/04—Feeding by means of driven pumps
    • F02M37/08—Feeding by means of driven pumps electrically driven
    • F02M37/10—Feeding by means of driven pumps electrically driven submerged in fuel, e.g. in reservoir
    • F02M37/106—Feeding by means of driven pumps electrically driven submerged in fuel, e.g. in reservoir the pump being installed in a sub-tank
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/85978—With pump
    • Y10T137/86075—And jet-aspiration type pump
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86187—Plural tanks or compartments connected for serial flow
    • Y10T137/86212—Plural compartments formed by baffles

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Abstract

本发明涉及到一种用于机动车的燃油箱(1)，其具有多个室(2，4)，在每个室(2，4)中各自设置有喷射泵(18，19)和液位传感器(11，12)。在通向喷射泵(18，19)的动力燃料管道(20，21)中设置有阀(24，25)。在室(2，4)几乎空了的时候，将禁止对喷射泵(18，19)的燃油供应，从而避免燃油不必要的运动。

Description

用于机动车的燃油箱
本发明涉及到一种用于机动车的燃油箱，其具有：多个用于收集燃油的室；可调节输送量的燃油输送单元；在燃油箱的至少一些室中设置的用于向输送单元输送燃油的喷射泵；从燃油输送单元的压力侧通向喷射泵的动力燃料管道；用于确定燃油液位的液位传感器以及用于评估液位传感器的信号和用于控制输送单元的控制单元。
这样的燃油箱例如被设计为鞍形油箱并且在实践中为人熟知。喷射泵在此用于将燃油从相对应的室中输送到输送单元，或者输送到容纳输送单元的室中。输送单元常常具有一个用于收集燃油并可被其他的喷射泵注满的防旋流箱。已知的是，即基于在供给管道中设置的压力调节装置的信号以及进而基于燃油的消耗调节输送单元的输送量，从而避免燃油在燃油箱中不必要的四处泵送。然而输送单元在特别小的消耗时也必须要维持向喷射泵输送燃油并且进而保证最小的输送量。这在通常情况下利用最低的泵转速来实现。随着室的数量的增加，最低输送量也会因为喷射泵的数量的增加而提高。
已经公开的燃油箱的缺点是，通过由喷射泵的数量确定的输送单元的输送量，大量的燃油向燃油箱运动。另外在燃油箱几乎空的时候，甚至当在各个室中没有燃油的时候，所有的喷射泵也会通过动力燃料管道被供给燃油。这种运动导致泡沫的形成以及导致燃油气化的加剧，这导致很多的燃油渗透到燃油箱周围。
本发明的目的是设计一种开头所述类型的燃油箱，保持燃油尽可能少的运动。
根据本发明的目的这样的实现，即在多个室中分别设置一个用于确定各个室中燃油液位的液位传感器，以及设置一个用于减少向处于几乎空了的室中的喷射泵的燃油输送的装置。
利用这种设计，在燃油箱的一个或者多个室空了的情况下可以这样降低输送量，即喷射泵获得很少的燃油或者完全不能获取燃油。对喷射泵的燃油输送的减少导致在燃油箱中燃油运动的减少。不必在每个单一的室中各自设置一个带有液位传感器的喷射泵。在其中一些室中设置有喷射泵和液位传感器时也就足够了。
根据本发明的一个有利的改进方案，当在一个室几乎空了的情况下形成用于降低输送单元的输送量的控制单元时，用于降低输送的装置的结构变得特别的简单。借此输送单元的输送量可以根据本发明的燃油箱的各个室中的燃油液位来相匹配。
根据本发明的另一个有利的改进方案，当在室中各自设置一个液位传感器时，并且当液位传感器单独与控制单元连接时，控制单元可以分别确定各个室中的液位，并且基于液位调节输送单元的输送量。这种设计的优点是，当第一个室空了的时候，在第一个室中设置的用于注满输送单元的防旋流箱的喷射泵也获得很少的燃油或者未获得燃油。
除了控制单元的单独的布置之外，这种功能也可以集成在发动机电子控制装置中。
根据本发明的另一个有利的改进方案，当在动力燃料管道中设置有可根据包括喷射泵的室中的液位而进行开关的阀时，在室几乎为空时，可以简单地禁止对喷射泵的燃油供给。
当阀设计为压力开启阀并且在动力燃料管道中在预设压力下的基本状态中关闭时，在输送单元的输送量减少时，阀可以自动禁止对喷射泵的燃油供给。
根据本发明的另一个有利的改进方案，当阀可以以电子方式进行开关且与控制单元连接时，在有多个室和喷射泵的情况下，喷射泵可以单独地关闭。
根据本发明的另一个有利的改进方案，当阀可以由液位传感器的浮子来进行开关的时候，喷射泵可以各自简单地与液位传感器和阀共同构成一个结构性的单元。在最简单的情况下，阀的关闭体通过连杆与浮子连接就足够了。这降低了根据本发明的燃油箱的装配复杂度。
根据本发明的另一个有利的改进方案，当液位传感器出现故障时，通过在液位传感器故障时用于将输送单元转换到最大泵送量和/或者用于打开在动力燃料管道中设置的阀的装置，可以简单地避免输送单元的无燃油运行。
本发明允许大量的实施例。为了进一步说明其基本原理，在附图中示出其中一个实施例，并在以下对其进一步说明。图中示出：
图1根据本发明的燃油箱的示意性截面图，
图2在图1中示出的燃油箱的动力燃料管道中设置的由浮子操纵的阀的示意性截面图，
图3在图1中示出的燃油箱的动力燃料管道中设置的可以电子方式进行开关的阀的示意性截面图，
图4在图1中示出的燃油箱的动力燃料管道中设置的压力控制阀的示意性截面图。
图1示出了一个用于机动车的燃油箱1，其具有一个在第一个室2中设置的燃油输送单元3和第二个室4。燃油输送单元3具有电驱动的在防旋流箱5中设置的燃油泵6，用于将燃油通过供给管道7输送到机动车内燃机8。在供给管道7中设置有燃油滤清器9和压力调节阀10。在超过供给管道7中预设压力时，燃油通过压力调节阀10回流到防旋流箱5中。在防旋流箱5中设置有一个液位传感器11。第二个室4同样具有一个液位传感器12。液位传感器11，12各自具有一个跟随各自室2，4中的燃油液位浮动的浮子13，14。液位传感器11，12以及燃油输送单元3与控制单元15电连接。此外，燃油箱1具有两个装配法兰16，17，通过装配法兰在燃油箱1中装配不同的部件。在室2，4中各自设置有一个喷射泵18，19。喷射泵18，19通过动力燃料管道20，21与燃油输送单元3的压力侧连接。燃油管道22，23从喷射泵18，19通入到防旋流箱5中。在动力燃料管道20，21中各自设置有一个阀24，25。此外防旋流箱5可以具有一个设计为止回阀的底部阀26，这个阀允许燃油从第一个室2流入到防旋流箱5中，但是防止燃油流出。
电子控制装置15利用液位传感器11，12的信号确定在各个室2，4中的燃油液位，并且当两个室2，4中的一个室几乎空了的时候，可降低燃油输送单元3的输送量(或者说输送能力)。从而降低通过动力燃料管道20，21向喷射泵18，19输送的燃油量。同时，阀24，25关闭对应的动力燃料管道20，21。因此减少了不必要的燃油溢流以及泡沫的形成。
图2示出了在图1中示出的燃油箱1的一个动力燃料管道21中设置的阀25的第一个实施例的示意性截面图。阀25具有一个关闭喷射泵19的阀体27。阀体27通过连杆28与液位传感器12的浮子14连接。在容纳有喷射泵19的室4中的液位较低时，阀体27移动到关闭喷射泵29的位置。从而在室4几乎空了的时候防止通过喷射泵19的燃油输送。
图3示出了在一个动力燃料管道21中设置的阀25的第二个实施例的示意性截面图。阀25可以以电子方式进行开关并且与图1中示出的控制单元15连接。当在图1中示出的对应的室4中设置的液位传感器12确定室4几乎空了的时候，控制单元15启动阀25，借此关闭动力燃料管道21。从而使相对应的喷射泵19获取不到燃油。
图4示出了在一个动力燃料管道21中设置的阀25的另一个实施例的示意图。阀25具有一个由弹簧部件29预压抵在阀座30上的关闭体31。当利用液位传感器11，12确定在图1中示出的燃油箱1的一个或者多个室2，4几乎空了的时候，控制单元15降低燃油泵6的输送量，这导致在动力燃料管道20，21中的压力下降。在压力下降时，关闭体31被弹簧部件29的力抵压在阀座30上并且关闭动力燃料管道21。

Claims (20)

1.一种用于机动车的燃油箱，其具有：多个用于收集燃油的室；一个可调节输送量的燃油输送单元；在燃油箱的至少一些室中设置的用于将燃油输送到输送单元的喷射泵；从燃油输送单元的压力侧通向喷射泵的动力燃料管道；用于确定燃油液位的液位传感器；以及用于评估液位传感器信号和控制输送单元的控制单元，其特征在于，在所述多个室(2，4)中分别设置有一个用于确定在所述各个室(2，4)中燃油液位的液位传感器(11，12)以及设置有用于减少向处于几乎空了的所述室(2，4)中的所述喷射泵(18，19)进行燃油输送的装置。
2.根据权利要求1所述的燃油箱，其特征在于，在所述室(2，4)几乎空了的时候，形成有用于降低输送单元(3)的输送量的控制单元(15)。
3.根据权利要求1所述的燃油箱，其特征在于，在所述室(2，4)中各自设置有一个所述液位传感器(11，12)，并且所述液位传感器(11，12)单独与所述控制单元(15)连接。
4.根据权利要求2所述的燃油箱，其特征在于，在所述室(2，4)中各自设置有一个所述液位传感器(11，12)，并且所述液位传感器(11，12)单独与所述控制单元(15)连接。
5.根据权利要求1-4中任意一项所述的燃油箱，其特征在于，在所述动力燃料管道(20，21)中设置有阀(24，25)，所述阀可以根据包括喷射泵(18，19)的室(2，4)中的液位而进行开关。
6.根据权利要求1-4中任意一项所述的燃油箱，其特征在于，所述阀(24，25)设计为压力开启阀，并且在所述动力燃料管道(20，21)中在预设压力下的基本状态中关闭。
7.根据权利要求5所述的燃油箱，其特征在于，所述阀(24，25)设计为压力开启阀，并且在所述动力燃料管道(20，21)中在预设压力下的基本状态中关闭。
8.根据权利要求1-4中任意一项所述的燃油箱，其特征在于，所述阀(24，25)可以以电子方式进行开关并且与所述控制单元(15)连接。
9.根据权利要求5所述的燃油箱，其特征在于，所述阀(24，25)可以以电子方式进行开关并且与所述控制单元(15)连接。
10.根据权利要求6所述的燃油箱，其特征在于，所述阀(24，25)可以以电子方式进行开关并且与所述控制单元(15)连接。
11.根据权利要求7所述的燃油箱，其特征在于，所述阀(24，25)可以以电子方式进行开关并且与所述控制单元(15)连接。
12.根据权利要求1-4中任意一项所述的燃油箱，其特征在于，所述阀(24，25)可以由所述液位传感器(12)的浮子(14)进行开关。
13.根据权利要求5所述的燃油箱，其特征在于，所述阀(24，25)可以由所述液位传感器(12)的浮子(14)进行开关。
14.根据权利要求6所述的燃油箱，其特征在于，所述阀(24，25)可以由所述液位传感器(12)的浮子(14)进行开关。
15.根据权利要求7所述的燃油箱，其特征在于，所述阀(24，25)可以由所述液位传感器(12)的浮子(14)进行开关。
16.根据权利要求8所述的燃油箱，其特征在于，所述阀(24，25)可以由所述液位传感器(12)的浮子(14)进行开关。
17.根据权利要求9所述的燃油箱，其特征在于，所述阀(24，25)可以由所述液位传感器(12)的浮子(14)进行开关。
18.根据权利要求10所述的燃油箱，其特征在于，所述阀(24，25)可以由所述液位传感器(12)的浮子(14)进行开关。
19.根据权利要求11所述的燃油箱，其特征在于，所述阀(24，25)可以由所述液位传感器(12)的浮子(14)进行开关。
20.根据权利要求19所述的燃油箱，其特征在于，一装置，所述装置在一个所述液位传感器(11，12)发生故障时用于将所述输送单元(3)转换到最大泵送量和/或者用于开启在所述动力燃料管道(20，21)中设置的阀(24，25)。
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