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Fuel filter

A fuel filter, filter housing technology, applied in membrane filters, filtration separation, liquid fuel feeders, etc., can solve the problems of running under conditions, unintentionally or intentionally, not being properly installed, etc.

Active Publication Date: 2012-01-25
MAHLE INT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When replacing the element, there is a risk that it will not be seated properly in the filter housing
In addition, there is a risk that the fuel filter is operated without the filter, unintentionally or intentionally

Method used

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Embodiment Construction

[0018] according to figure 1 , a fuel filter 1, which is suitable for filtering liquid fuel, such as gasoline or diesel, the fuel filter includes a filter housing 2 and a filter element 3. The filter housing 2 includes an inlet 4 on the untreated side, an outlet 5 on the treated side, and an oil return pipeline 6 on the untreated side. The filter housing 2 is assembled from a cup-shaped lid 7 and a cup-shaped bottom 8 which can be screwed together by means of a threaded connection 9 . Inlet 4 , outlet 5 and oil return line 6 are here formed on cover 7 . The filter housing 2 is preferably provided in a pendant mounted position so that for maintenance of the fuel filter 1 the bottom 8 can be screwed off while the upper cover 7 remains stationary. Alternatively, an upright mounting position can also be provided, whereby the cover 7, including connections 4, 5, and 6, is placed on the bottom, remaining stationary, functionally equivalent to forming a "bottom of the housing", whi...

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PUM

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Abstract

The present invention relates to a fuel filter (1) for a fuel supply system of an internal combustion engine, in particular in a motor vehicle, comprising a filter housing (2) and a filter element (3). The filter housing (2) has an untreated-side inlet (4), a treated-side outlet (5) and an untreated-side return line (6). The filter element (3) is arranged in the filter housing (2) and, therein, separates an untreated space (13), which communicates with the inlet (4) and with the return line (6), from a treated space which communicates with the outlet (5). Additionally provided is a closure element (20) which, in the operationally ready state of the fuel filter (1), closes off the return line (6).

Description

technical field [0001] The present invention relates to a fuel filter for a fuel supply system of an internal combustion engine, in particular in a motor vehicle. Background technique [0002] The internal combustion engine has a fuel supply system for its liquid fuel supply. The fuel supply system typically includes a fuel tank, a fuel pump, a fuel filter, and an injection system. In order to reduce the risk of damage to the injection system or the internal combustion engine, respectively, it is necessary to clean the fuel supplied to the internal combustion engine from the pollutants entrained by the fuel. Thus, the fuel filter is an element relevant to the operational reliability of the internal combustion engine. The fuel filter typically has a filter housing that includes a raw end inlet and a treated end outlet. Further, a filter element (filter element) arranged in the filter housing is also provided, the filter element isolates the untreated space and the treated ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M37/22F02M37/42
CPCB01D35/153B01D2201/4007F02M2037/226F02M37/22B01D35/16F02M37/46F02M37/04F02M37/42B01D2201/291B01D35/147B01D35/30F02M37/0052F02N15/10F02N2200/02
Inventor 米夏埃尔·布劳恩海姆
Owner MAHLE INT GMBH
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