Power plants – Internal combustion engine with treatment or handling of... – By means producing a chemical reaction of a component of the...
Reexamination Certificate
2005-02-15
2005-02-15
Tran, Binh Q. (Department: 3748)
Power plants
Internal combustion engine with treatment or handling of...
By means producing a chemical reaction of a component of the...
C060S274000, C060S297000, C060S298000, C060S320000
Reexamination Certificate
active
06854263
ABSTRACT:
A method and a device for controlling the temperature of an NOxaccumulator to purify the exhaust gas stream of an internal combustion engine, can be used especially for diesel or lean-burn engines. A heat flow is carried off from the exhaust gas stream upstream of the NOxaccumulator in the exhaust gas line depending on the operating state of the internal combustion engine, so that a maximum temperature of the NOxaccumulator is not exceeded and more particularly so that a specified temperature range is maintained. In order to obtain a minimum operating temperature of the NOxaccumulator, the internal combustion engine is operated at least at an air-fuel ratio of λ≦1 until the minimum operating temperature is reached.
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Brück Rolf
Pfalzgraf Bernhard
EMITEC Gesellschaft fuer Emissionstechnologie mbH
Greenberg Laurence A.
Mayback Gregory L.
Stemer Werner H.
Tran Binh Q.
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