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Method for operating a diesel fuel filter heater

A filter and heater technology, applied in fuel heat treatment device, fuel injection control, liquid fuel feeder, etc., can solve the problem of high risk of paraffinization of fuel filter

Active Publication Date: 2012-01-18
BORGWARNER BERU SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore there is a greater risk of fuel filter paraffinization when using biodiesel

Method used

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  • Method for operating a diesel fuel filter heater
  • Method for operating a diesel fuel filter heater
  • Method for operating a diesel fuel filter heater

Examples

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Embodiment Construction

[0021] figure 1 A schematic depiction of a fuel tank 1 of a vehicle is shown. A fuel pump 2 is used to pump diesel fuel from the fuel tank 1 to the fuel filter 4 and from there to the fuel injection system 7 of the motor vehicle (common rail injection). The fuel filter 4 includes a water reservoir 4a, a heater 4b, and a water sensor 4c. The filter heater 4 b , symbolized by a coil, comprises at least one PTC element, preferably a ceramic PTC element, and is controlled by a glow plug control 6 . The glow plug control unit 6 communicates with the engine control unit 8 .

[0022] The engine control unit 8 informs the glow plug control device 6 when heating is required, for example before the engine is started. The glow plug control 6 then uses pulse width modulation to generate an effective voltage from the vehicle system voltage and applies it to the filter heater 4b. The glow plug control 6 then monitors the power consumed by the filter heater 4b during a number of successi...

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PUM

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Abstract

The invention relates to a method for operating a diesel fuel filter heater comprising at least one PTC element, in a motor vehicle. According to the invention, a glow plug control device (6) is used to generate an effective voltage from a vehicle system voltage using pulse width modulation, which is then applied at the filter heater (4b).

Description

technical field [0001] The invention relates to a method for operating a diesel fuel filter heater comprising at least one PTC element in a motor vehicle. Background technique [0002] A method is known from DE 10152084 A1 in which a control device uses pulse-width modulation to generate the effective voltage for the filter heater from the vehicle system voltage. [0003] At low temperatures, diesel fuel becomes of increased viscosity and cannot flow through fuel filters to an adequate degree. This is called paraffinization of the fuel filter. When frost forms, the tank heater is often insufficient to keep the temperature of the diesel fuel throughout the line system high enough to prevent paraffinization of the fuel filter. This can be improved with a filter heater. [0004] The increased use of diesel fuel blends containing mineral and biosynthetic fractions has increased the demands placed on diesel fuel filter heaters. This diesel fuel blend is often called biodiesel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/22F02M31/125F02P19/02
CPCY02T10/126F02M37/223F02M31/125F02M37/30Y02T10/12
Inventor 彼得·舍费尔克莱门特·允柯尔特
Owner BORGWARNER BERU SYST