Catalytic converter
AssigneeNelson Burgess Limited
InventorsKenneth Pawson, Robert David Godrich
Life of this patent
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Abstract
A catalytic converter assembly comprises a housing having an exhaust gas inlet and an exhaust gas outlet. A first chamber enclosed by the housing receives incoming exhaust gas and a second chamber contains a catalyst bed. Gas flows from the first chamber to the second chamber through an exhaust gas passage. A perforated enclosure surrounds the gas passage within said first chamber to induce a region of turbulence in the exhaust gas flow within the enclosure immediately upstream of the passage; An injector extends into the enclosure for injecting a reducing agent into the region of turbulence so that the reducing agent is rapidly dispersed and mixed within the exhaust gas flow before reaching the catalyst bed.
Claims12
A catalytic converter assembly comprising:
- a housing having an exhaust gas inlet and an exhaust gas outlet, an exhaust gas low path being defined through the housing from said inlet to said outlet;
- a first chamber enclosed by the housing receiving incoming exhaust gas;
- a second chamber enclosed by the housing downstream of and immediately adjacent said first chamber and containing a catalyst bed;
- an exhaust gas passage from said first chamber to said second chamber;
- a perforated tubular enclosure surrounding said passage within said first chamber to induce a region of turbulence in the exhaust gas flow within said enclosure immediately upstream of said passage;
- said tubular enclosure having a further portion extending through said passage and into said second chamber;
- an injector extending into said enclosure for injecting a reducing agent into said region of turbulence;
- whereby the reducing agent is rapidly dispersed and mixed within the exhaust gas flow before reaching the catalyst bed.
Dependencies are inferred from the claim text.