Apparatus and method for filtering engine exhaust gases
AssigneeJaguar Land Rover Limited
InventorJonathan Hartland
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Abstract
Embodiments of the invention provide an engine aftertreatment apparatus comprising first and second diesel particulate filters (DPFs), the first DPF being provided upstream of the second DPF, the second DPF being provided with a coating of a second DPF catalyst, the second DPF catalyst being arranged to promote reduction of NOx.
Claims19
An apparatus comprising first and second diesel particulate filter (DPF) modules, the first DPF being provided upstream of the second DPF, the second DPF comprising a DPF catalyst arranged to promote reduction of one or more nitrogen oxides, wherein the first DPF comprises a filter of flow-through or deep bed type.
A method of treatment of engine exhaust gases comprising:
- passing the exhaust gases through a first diesel particulate filter (DPF);
- and
- subsequently passing the exhaust gases through a second DPF downstream of the first DPF;
- the second DPF comprising a DPF catalyst arranged to promote reduction of NOx.
A vehicle comprising:
- a first diesel particulate filter (DPF), wherein the first DPF comprises at least one of a flow-through filter and a deep bed type filter;
- and
- a second DPF downstream of the first DPF, wherein the second DPF comprises a DPF catalyst arranged to promote reduction of a nitrogen oxide.
Dependencies are inferred from the claim text.