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Heating device for a fuel filter

A technology of fuel filter and heating device, which is applied in the direction of fuel heat treatment device, filtration and separation, charging system, etc. It can solve the problems of engine stop, power loss, clogged fuel filter, etc., and achieve the effect of improving the spring effect

Inactive Publication Date: 2012-09-12
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the concentration of alkane crystals increases strongly, the alkane crystals clog fuel filters, which can lead to power losses and possibly even engine shutdowns

Method used

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  • Heating device for a fuel filter
  • Heating device for a fuel filter
  • Heating device for a fuel filter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] The heating device 10 according to the invention is in figure 1 and 2 As can be seen in , it comprises a disc-shaped cover 12 which largely closes a cup-shaped housing 14 .

[0034] A plurality, now four, of arms 16 are formed on the cover 12 . Cover 12 and arm 16 are constructed of spring steel.

[0035] The cover 12 has an embossed recess 20 and an opening 22 in a central region 18 . The recess 20 increases the bending stiffness of the cover 12 in its central region 18 . Opening 22 is designed for a fluid, currently fuel, to flow through during operation of heating device 10 .

[0036] On the radially outer area of ​​the cover 12 , a plurality, at least three, of openings 24 are provided circumferentially. One pin 28 protrudes through opening 24 in the direction of longitudinal axis 26 of housing 14 . The pins 28 are formed on sockets 30 which are formed in the lower, inner corner region of the cup-shaped housing 14 distributed over the circumference of the hous...

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PUM

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Abstract

The invention relates to a heating device (10) for a fuel filter of a motor vehicle operated by diesel fuel, said heating device having a housing (14), support structures (32) designed therein, at least one PTC element (46) arranged between two contact plates (38; 40), at least one spring element (16) for pressing the contact plates (38; 40) and the at least one PTC element (46) to one another and against at least one of the support structures (32) and a cover (12) sealing the housing (14). According to the invention, the at least one spring element (16) is designed as an arm (16) formed on the cover (12).

Description

technical field [0001] The invention relates to a heating device for a fuel filter of a motor vehicle powered by diesel fuel, the heating device comprising: a housing; a support structure formed in the housing; at least one contact plate arranged between two a PTC element; at least one spring element for pressing the contact plate and the at least one PTC element against each other and onto at least one of the support structures; and a cover closing the housing. Background technique [0002] Long-chain carbohydrates, so-called alkanes, can precipitate out in diesel fuel at low temperatures. Alkanes form crystals that float in the fuel. The fuel thus becomes more viscous and more difficult to filter. When the concentration of alkane crystals increases strongly, the alkane crystals clog the fuel filter, which can lead to power losses and possibly even to a shutdown of the engine. For this reason, in modern diesel engines a so-called PTC heater is usually connected upstream ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M31/125B01D35/18
CPCB01D35/18F02M31/125Y02T10/12
Inventor A·帕拉纳瓦雷特C·J·布拉斯科雷马查C·华拉罗佩罗
Owner ROBERT BOSCH GMBH
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