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Fuel filter system

A filter system and fuel technology, applied in the direction of charging system, filter circuit, filter separation, etc., can solve the problems of water separation performance deterioration, reduction, loss of water separation performance, etc.

Inactive Publication Date: 2010-09-01
MANN HUMMEL GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this construction is that the main filter element is loaded with dirt due to its effective filtering properties and this dirt reduces or prevents the flow through.
Furthermore, over time, the main filter element loses its performance as a coalescing element, which means that the filter system as a whole loses its water separation performance or this water separation performance deteriorates until the filter is replaced. filter element

Method used

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Examples

Experimental program
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Embodiment Construction

[0016] according to figure 1 The fuel filter includes a housing 10 . The housing 10 is substantially pot-shaped. The housing is closed in the upper region by a cover 11 which has openings 12 for the inflow of fuel, one of which is shown here. The inlets are arranged as perforations on a partial circle and are evenly spaced. Furthermore, an outlet 13 is provided, from which cleaned fuel can be removed. At the lower end of the housing 10 there is a drain valve 14 , which is only schematically shown here. Inside the housing there is a standpipe 17 . In the housing 10 there is a particle filter 19 which is made of a zigzag-folded filter material, which can have a multi-layer structure, for example. A coalescing element 20 is arranged above the particle filter 19 . In the exemplary embodiment shown, this condensation element 20 is likewise produced from a zigzag folded medium. This medium may be a polyester material, polyamide or other material with condensation properties f...

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Abstract

A fuel filter system characterized by a simple design provided with a coalescer element ( 20 ) disposed in the immediate fuel inlet region for improving the elimination of water droplets. The coalescer element includes an upper end plate ( 26 ) that extends to the inner wall of the housing ( 10 ), thereby sealing the coalescer element as well as the inlet region and the outer unfiltered fluid region. The coalescer element ( 20 ) and the particle filter ( 19 ) are arranged on a common separating element ( 25 ), which rests against the discharge tube ( 17 ) located in the center of the fuel filter via a profiled seal. The end plate of the coalescer element can be produced with the profiled elastomeric seal molded thereon by two-component injection molding or by overmolding.

Description

technical field [0001] The invention relates to a filter system for fuel, in particular a diesel filter, in which a particle filter is arranged in a housing. Background technique [0002] A fuel filter is known from US 5,084,170. The fuel filter has a housing in which a main filter element and a second filter element are arranged. Fuel flows through the primary filter element from the inside out. Furthermore, this main filter element has coalescing properties, so that water that may be present in the fuel coalesces, ie forms larger water droplets. These water droplets enter a water accumulation chamber. In order that water droplets do not flow through the second filter element, the filter element is provided with a hydrophobic material, in particular silicon, so that an external water barrier is formed. Both the first filter element and the second filter element are produced from a pleated filter paper or filter fiber web. The fuel flows through the first filter element...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D36/00
CPCB01D36/003B01D27/148F02M37/24
Inventor G·-M·克莱因G·约克沙斯M·克莱因
Owner MANN HUMMEL GMBH
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