Method of regenerating an exhaust gas purification filter, and vaporizer
AssigneeFaurecia Emissions Control Technologies, Germany GmbH
InventorsWilbur Crawley, Tobias Danner, Wolfgang Hahnl, Jurgen Klement, Marco Ranalli, Barbara Lacher
Life of this patent
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Abstract
A method of regenerating an exhaust gas purification filter, in particular for internal combustion engines, uses a vaporized liquid that is to be introduced into the exhaust gas flow. A surface temperature of a heating element in a vaporizer chamber is limited to a maximum of 700 to 750° C.
Claims19
A method of regenerating an exhaust gas purification filter of an internal combustion engine using a vaporized liquid to be introduced into an exhaust gas flow, comprising by the steps of:
- providing at least one heating element positioned in a vaporizer chamber, wherein the at least one heating element includes at least one heating coil;
- feeding a liquid into the vaporizer chamber;
- heating up and vaporizing the liquid with the at least one heating element;
- controlling a surface temperature of the at least one heating element, in an operating condition, within a range of 700° C. to 750° C.;
- supplying energy to the at least one heating element as a function of an amount of liquid present in the vaporizer chamber and/or of liquid mass flow delivered through the vaporizer chamber;
- and
- heating up and vaporizing the liquid without igniting the liquid.
The method according to 1, wherein the at least one heating element is a glow plug that is within the vaporizer chamber, and wherein the vaporizer chamber is downstream from the internal combustion engine and upstream of the exhaust gas purification filter.
A method of regenerating an exhaust gas purification filter of an internal combustion engine using a vaporized liquid to be introduced into an exhaust gas flow, comprising by the steps of:
- providing at least one electric heating element positioned in a vaporizer chamber, wherein the at least one electric heating element includes at least one heating coil;
- feeding a liquid into the vaporizer chamber;
- heating up and vaporizing the liquid with the at least one electric heating element;
- controlling a surface temperature of the at least one electric heating element, in an operating condition, within a range of 700° C. to 750° C.,
- controlling the at least one electric heating element based on an amount of liquid supplied to the vaporizer chamber by a pump;
- and
- heating up and vaporizing the liquid without igniting the liquid.
A vaporizer of a vehicle exhaust gas purification device comprising:
- a vaporizer chamber that receives a liquid;
- at least one electrical heating element positioned in the vaporizer chamber to heat the liquid;
- a controller configured to control surface temperature of the at least one electrical heating element within a range of 700° C. to 750° C.;
- the controller configured to supply energy to the at least one heating element as a function of an amount of liquid present in the vaporizer chamber and/or of liquid mass flow delivered through the vaporizer chamber;
- and
- the controller configured to heat up and vaporize the liquid without igniting the liquid.
Dependencies are inferred from the claim text.