Preventing early degradation of exhaust treatment devices
AssigneeFord Global Technologies, LLC
InventorDavid Arthur Ketcher
Life of this patent
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Abstract
A method is described for preventing early degradation of an exhaust treatment device installed in a diesel powered vehicle, the treatment device having an active element located within a casing by means of a mat surrounding the active element. The method comprises temporarily operating the engine at an early stage following the installation of the exhaust treatment device in an alternative mode wherein the temperature of the exhaust treatment device is raised sufficiently to cause the mat surrounding the active element of the exhaust treatment device to pop.
Claims20
A method of preventing early degradation of an exhaust treatment device installed in a diesel powered vehicle, the treatment device having an active element located within a casing by means of a mat surrounding the active element, which engine in normal operation does not reach a temperature which causes the mat to expand and secure the exhaust treatment device during initial operation, which method comprises temporarily operating the engine at an early stage following the installation of the exhaust treatment device in an alternative mode wherein the temperature of the exhaust treatment device is raised sufficiently to cause the mat surrounding the active element of the exhaust treatment device to pop.
A method for operating a diesel engine having an exhaust treatment device, the treatment device having an active element located within a casing, with a mat surrounding the active element, which engine in normal operation does not reach a temperature which causes the mat to expand and secure the exhaust treatment device during initial operation, the method comprising:
- requesting an alternative mode of operation following installation of the exhaust treatment device;
- and
- increasing exhaust temperature of the diesel engine in response to said request to cause the mat surrounding the active element of the exhaust treatment device to expand and stiffen so that said active element is secured to said casing.
A system for a diesel engine, comprising:
- a treatment device comprising:
- a casing,
- an active element located within said casing, and
- a mat surrounding said active element, wherein the engine, in normal operation, will not reach a temperature which causes the mat to expand and secure the exhaust treatment device during initial operation;
- a controller for requesting an alternative operating mode, and in response to said request, adjusting an operating parameter to increase exhaust gas temperature and expand and stiffen said mat to locate said active element within said casing.
A method of preventing early degradation of an exhaust treatment device installed in an engine powered vehicle, the treatment device having an active element located within a casing by a mat surrounding the active element, which engine in normal operation will not reach a temperature which causes the mat to expand and secure the exhaust treatment device during initial operation, which method comprises;
- temporarily operating the engine at an early stage following the installation of the exhaust treatment device in an alternative mode wherein the temperature of the exhaust treatment device is raised sufficiently to cause the mat surrounding the active element of the exhaust treatment device to secure the active element.
Dependencies are inferred from the claim text.