DE202006007960U1 - Fuel filter, especially for diesel engines running on renewable fuels, comprises double-walled housing forming heating jacket - Google Patents

Abstract

A fuel filter comprises a double-walled housing (1) forming a heating jacket (9) with an inlet and outlet for a heat carrier, a sealing sleeve (5) for inserting a cover plate (6) with fuel inlet and outlet connectors and a filter insert (18) suspended from the cover plate, where the fuel inlet (7) is in communication with the space between the filter insert and the inner wall of the housing and the cover plate has a hole (10) connecting the interior of the filter insert to the fuel outlet (8). The filter insert together with the cover plate can be removed upwards from the housing.

Description

The The present invention relates in particular to a fuel filter for use with regenerative fuels, e.g. Rapeseed oil.

Diesel engines z. As in motor vehicles, have as a problem that the Diesel fuel has too high a viscosity at lower temperatures, to be effectively atomized by the injection system fine enough can and a good ignitable mixture to ensure. For diesel substitute fuels, as well as the diesel fuel itself is added that components such. B. paraffin can flocculate, the the injectors To block.

It It is known to avoid this problem by preheating the fuel.

The The present invention is therefore based on the object, a very easy to handle option for the Fuel Heater to create that for the subsequent Installation is particularly well suited and in which the filter removal for cleaning or the replacement can be easily taken without using diesel fuel or regenerative fuels exit from the filter housing after opening can.

The solution This task succeeds with a filter for oil filtration, especially for diesel engines. In this case, according to the invention, the filter housing is double-walled formed, with the walls enclose a chamber. To the chamber are inlets and outlets for one Heat transfer medium connected and the filter housing has an upper sealing sleeve into which a head plate under Seal insertable is, with the top plate connections for the oil supply and derivative. From the top plate hangs a filter insert, wherein leave a cavity between the filter cartridge and the inner housing wall is. The inlet communicates with the cavity and the top plate has a hole that the inside of the filter cartridge with the oil drain combines.

The Operation of the filter according to the invention is the following.

Of the Heat transfer medium, z. B. the warm cooling water of the engine, is connected to the heat carrier inlet of the housing connected, flows through the chamber and leaves the case over the Outlet back to a heated reservoir or the radiator of the engine. It deprives the oil in the cavity over the Chamber interior wall heat.

Of the between oil inlet and oil outlet flowing Heated fuel yourself and get over the filter with reduced viscosity to the injection system of the engine or to another consumer.

To the Cleaning or replacing the filter can do this together with its Simply pull the head plate upwards, dripping oil into the head plate Cavity expires and so pollution can be avoided. It is advantageous that the oil leading hoses not from their connections must be deducted.

In Particularly advantageously, the filter set is heated, so that to start a diesel engine, so even if no warm cooling water to disposal stands, the oil z. B. over the starter battery heats up can be.

The Sealing of the filter interior is done in a simple manner Help an O-ring, which rests against the sleeve inner wall, is inserted in a groove of the top plate and pulled out with this can and can.

The Electric heating of the filter element can advantageously be used in two ways Way done. Once inside the filter insert a heating cartridge However, it is also provided, the filter from a produce electrically conductive fibers having material and to use their resistance for heating. This creates a relatively high size Heat exchanger surface, so that only small heating times are required.

Ultimately It is proposed to arrange a handle on the top plate, with whose help the insert can be pulled out of the cavity.

Based the enclosed figure as an embodiment the present invention will be explained in more detail.

In the figure is a double-walled, cup-shaped filter housing 1 shown between the inner wall 16 and the outer wall 17 a chamber 9 leaves free. To this chamber 9 is a feed 3 and a process 4 connected for a heat transfer medium. This heat transfer medium is in particular the cooling water of a diesel engine, which after reaching the operating temperature of the engine constantly heat to the inner wall 16 of the cavity 2 transfers. The inner wall 16 encloses the cavity 2 in the filter insert 18 , z. B. a filter fabric insert at a distance from the wall 16 is inserted. The filter cartridge is of an upper 19 and a lower lid 20 held, with the top lid 19 a headstock 6 connected is. Between outer wall 17 and inner wall 16 is the chamber 9 ,

This headstock 6 has the connections 7 for the oil supply and 8th the oil drain on, with the supply line 7 directly with the cavity 2 communicates and the derivative 8th over the hole 10 connected to the filter interior.

Inside the filter is the heating cartridge 15 indicated by the electrical wires 11 . 12 the filter cartridge or the oil contained therein preheats as needed. The wires 11 . 12 can also z. B. to the lid 19 . 20 be connected to use the filter fabric as a resistance heater. The headstock 6 has a collar 21 who is on a lead 22 the sealing cuff 5 rests, also has the top plate 6 an o-ring 13 on.

With the help of the finger grip 14 or a pair of them, the entire filter cartridge can be pulled out of the cavity for maintenance purposes, dripping oil remains in the cavity 2 , so that contamination of the environment of the filter housing can be avoided.

1

filter housing

2

cavity

3, 4

Heat transfer pipes

3

sealing sleeve

4

headstock

7, 8th

oil lines

5

chamber

6

drilling

11 12

electric lines

7

O-ring

8th

Handle

9

Cartridge Heater

10

inner housing

11

outer housing wall

12

filter cartridge

19 20

cover

13

collar

14

head Start

Claims (6)

Filter for oil filtration, in particular for diesel engines, having the following features: a) the filter housing ( 1 ) is double-walled and encloses a chamber ( 9 ), b) to the chamber ( 9 ) are inlets and outlets ( 3 . 4 ) connected to a heat transfer, c) the filter housing ( 1 ) has an upper sealing collar ( 5 ) into which a head plate ( 6 ) can be inserted under sealing, wherein d) the top plate ( 6 ) Connections for oil supply and discharge ( 7 . 8th ) e) from the top plate ( 5 ) hangs a filter cartridge ( 18 ), where f) between the filter cartridge ( 18 ) and the inner housing wall ( 16 ) a cavity ( 2 ), (g) the feed ( 7 ) with the cavity ( 2 ) and h) the top plate ( 6 ) a hole ( 10 ), the interior of the filter cartridge ( 7 ) with the oil discharge ( 8th ) and where i) the filter cartridge ( 18 ) together with the top plate ( 6 ) from the cavity ( 2 ) is pulled upwards. Filter according to claim 1, characterized in that the filter element via electric lines ( 11 . 12 ) is heated. Filter according to claim 1 or 2, characterized in that the head plate ( 6 ) via an O-ring ( 13 ) against the cuff ( 5 ) is sealed. Filter according to claim 1-3, characterized in that inside the filter insert a heating cartridge ( 15 ) is arranged. Filter according to claims 1-3, characterized in that the filter insert has a filter fabric which is electrically is conductive and serves as a resistance heater. Filter according to claim 1-3, characterized in that the head plate ( 6 ) with a handle ( 14 ) connected is.