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Device for providing a liquid additive, and method for heating the additive

A technology of liquid additives and additives, applied in the field of devices for providing liquid additives and heating additives, capable of solving problems that affect electrical transient failures of electronic equipment

Active Publication Date: 2015-10-07
VTESCO TECH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, current peaks can cause electrical transient failures that can affect electronic equipment in motor vehicles

Method used

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  • Device for providing a liquid additive, and method for heating the additive
  • Device for providing a liquid additive, and method for heating the additive
  • Device for providing a liquid additive, and method for heating the additive

Examples

Experimental program
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Effect test

Embodiment Construction

[0036] figure 1 A motor vehicle 14 is shown schematically with an internal combustion engine 15 to which the exhaust gas line 2 is connected. A catalytic converter 16 is formed in the exhaust line 2 . Upstream of the catalytic converter 16 , liquid additives can be introduced into the exhaust gas by means of the device 1 . The device 1 comprises a tank 3 which is fluidly connected via a delivery line 4 to a metering device 6 for metering the additive. The metering device 6 in the illustrated embodiment is a valve comprising a coil 7 and a movable member 8 - in this case a valve needle. During operation of the motor vehicle 14 , a liquid additive can be fed into the exhaust gas line 2 by means of the device 1 .

[0037] figure 2 The device 1 is shown schematically with a tank 3 . In the tank 3 a container 18 is formed, in which in turn a metering device 6 for metering the liquid additive is arranged. In this example, the metering device 6 is realized in the form of a pum...

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PUM

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Abstract

A device for providing a liquid additive into an exhaust line includes a tank, a delivery line, a heating element formed of a posistor or PTC material for heating the additive in the tank and / or the delivery line, and a dosing device or doser for dosing the liquid additive. The dosing device has a coil and a movable component and the movable component can be moved by the coil. The coil can be connected electronically in series with the heating element by a first switching element. It is thus possible for an activation current through a heating element formed of a posistor material to be limited in magnitude in an inexpensive manner.

Description

technical field [0001] The invention relates to a device for supplying liquid additives into an exhaust line and a method for heating the additive in the device. The invention is used in particular in motor vehicles provided with tanks for storing liquid additives. Background technique [0002] The use of exhaust gas aftertreatment methods in which liquid additives are added to the exhaust gas is considered known. The aim of such methods is in particular to convert the pollutants contained in the exhaust gas in as thorough and effective a manner as possible. [0003] For example, it is known to supply an oxidizer (such as a fuel or a hydrocarbon) to the exhaust gas. The additives can be used to directly react with components in the exhaust gas and thus convert pollutants. However, the oxidizing agent can also be used to modify the ambient conditions in the exhaust system to a desired state suitable for the conversion of pollutants. Fuels or hydrocarbons can, for example,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/20
CPCF01N3/2066F01N2610/02F01N2610/10F01N2610/105F01N2610/1406F01N2900/1811Y02T10/24Y02T10/12
Inventor P·鲍尔F·弗雷德里克森T·T·汉森
Owner VTESCO TECH GMBH