Importance

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Abstract

A soot-filtering unit for an exhaust section of a diesel internal combustion engine with a supercharging device. The soot-filtering unit has at least on soot filter in an exhaust line and a regeneration device for the soot filter which includes at least one burner. The configuration of the unit connects an air intake of the burner of the regeneration device to the supercharging device so that the burner is supplied with a portion of the air charge from the supercharging device of the diesel internal combustion engine. In this connection, the configuration can be done in such a way that the burner is supplied exclusively with air from the air charge produced by the supercharging device, or so that the burner is supplied with a mixture of air from the air charge and exhaust gas from the exhaust gas line. The invention enables the burner of the regeneration device to always be reliably ignited, irrespective of engine performance characteristics, without requiring additional devices, and the construction expense for such a soot-filtering unit can be reduced. Multifilter systems, such as double-filter systems, which have either a single burner as a regeneration device or separate burners, are possible in accordance with various embodiments. Furthermore, operation of the burner is possible either exclusively with air charge from the supercharging device or with a mixture of exhaust gas and air charge in the multifilter systems, as well.

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First Claim