Method and system for exhaust cleaning
AssigneeScania CV AB
InventorsCarl-Johan Karlsson, Klas Telborn
Life of this patent
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Abstract
A method pertaining to regeneration of a particle filter (202) pertaining to a combustion process, which filter is arranged to treat exhaust gases arising from combustion in a combustion engine (101). When at least one measure for raising the temperature of the particle filter (202) is activated, determining a temperature for the particle filter (202), comparing the temperature determined with a first temperature and discontinuing the measure for raising the temperature of the particle filter (202) when the temperature determined is below the first temperature.
Claims18
A method pertaining to regeneration of a particle filter pertaining to a combustion process, wherein the filter is arranged to treat exhaust gases arising from combustion in a combustion engine, the method comprising:
- (a) a first activating of at least one step to raise the temperature of said particle filter;
- (b) determining a temperature Tfilter of said particle filter;
- (c) comparing said determined temperature Tfilter with a first temperature Tlimit1;
- d) when said determined temperature Tfilter is below said first temperature Tlimit1, discontinuing said step to raise the temperature of said particle filter;
- and
- (e) a second activating of at least one step to raise the temperature of said particle filter when said temperature Tfilter of said filter exceeds a second temperature limit Tlimit2 which is higher than said first temperature Tlimit1 after said step for raising temperature of said particle filter has been discontinued.
A system for regeneration of a particle filter pertaining to a combustion process comprising:
- a filter configured to treat exhaust gases arising from combustion in a combustion engine;
- said system comprising:
- at least one device configured and operable and located to perform at least one step to raise a temperature of said particle filter,
- when said device to perform said at least one step for raising the temperature of said particle filter is activated, said system comprises:
- (a) a temperature determining device configured for determining a temperature Tfilter of said particle filter;
- (b) a comparing device configured and operable for comparing said determined temperature Tfilter with a first temperature Tlimit1, and comparing said determined temperature Tfilterwith a second temperature limit;
- wherein
- (c) when said determined temperature Tfilter is below said first temperature Tlimit1, operation of said at least one device to perform said at least one step for raising the temperature of said particle filter is discontinued;
- and
- (d) at least one step for raising the temperature of said particle filter is activated when the temperature Tfilter of said filter exceeds said second temperature limit Tlimit2 ,which is higher than said first temperature Tlimit1, after operation of said at least one device to perform said at least one step for raising the temperature of said particle filter has discontinued.
A method pertaining to regeneration of a particle filter pertaining to a combustion process, wherein the filter is arranged to treat exhaust gases arising from combustion in a combustion engine, the method comprising:
- a) activating at least one measure for raising the temperature of said particle filter;
- b) selecting a first temperature Tlimit1 which is below a temperature sufficient for regenerating the particle filter;
- c) determining a temperature Tfilter of said particle filter;
- d) comparing said determined temperature Tfilter with said first temperature Tlimit1;
- e) when said determined temperature Tfilter is i below said first temperature Tlimit1, discontinuing said measure for raising the temperature of said particle filter;
- and
- f) after discontinuing said measure for raising the temperature of said particle filter, activating at least one measure for raising the temperature of said particle filter when the temperature Tfilter exceeds a second temperature Tlimit2 which is higher than said first temperature Tlimit1.
Dependencies are inferred from the claim text.