Exhaust system combustion for rapid catalyst heating
AssigneeSaudi Arabian Oil Company
InventorsAndrew Baur, Xin Yu, Anqi Zhang, David Cleary
Life of this patent
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Abstract
A motor system includes an engine having one or more cylinders, an electronic control unit, an exhaust treatment system in fluid connection with and downstream of the one or more cylinders. The exhaust treatment system includes an exhaust line, a combustion zone downstream, a combustion ignition source in the combustion zone, a catalyst downstream of an in thermal communication with the combustion zone. A method of heating a catalyst during an engine cold start and a method of initiating regular operating conditions of an engine having one or more cylinders are also described.
Claims19
A motor system comprising:
- an engine having one or more cylinders;
- an electronic control unit;
- and
- an exhaust treatment system in fluid connection with and downstream of the one or more cylinders, wherein the exhaust treatment system comprises:
- an exhaust line;
- a flame arrestor;
- a combustion zone, wherein the flame arrestor is located upstream of the combustion zone;
- a combustion zone ignition source in the combustion zone;
- and
- a catalyst downstream of and in thermal communication with the combustion zone.
A method of heating a catalyst during an engine cold start, the method comprising:
- providing a mixture of air and fuel to an exhaust treatment system, wherein the exhaust treatment system comprises:
- an exhaust line;
- a flame arrestor;
- a combustion zone, wherein the flame arrestor is located upstream of the combustion zone;
- an combustion zone ignition source disposed in the combustion zone;
- and
- a catalyst downstream of and in thermal communication with the combustion zone;
- operating the combustion zone ignition source to combust the mixture of air and fuel, thereby generating a combustion gas in the exhaust treatment system;
- and
- heating the catalyst with the generated combustion gas.
A method of initiating regular operating conditions of an engine having one or more cylinders, the method comprising:
- heating a catalyst of an exhaust treatment system in fluid connection with the engine, wherein the exhaust treatment system comprises:
- an exhaust line;
- a flame arrestor;
- a combustion zone, wherein the flame arrestor is located upstream of the combustion zone;
- a combustion zone ignition source disposed in the combustion zone;
- and
- the catalyst downstream of and in thermal communication with the combustion zone;
- operating an electronic control unit to deactivate the combustion zone ignition source;
- and
- operating the electronic control unit to initiate regular engine operating conditions.
Dependencies are inferred from the claim text.