Tenneco Automotive Operating Company Inc.

Matthew Muhleck

Thomas M Harris

Adam J Kotrba

Timothy P Gardner

David L Anderson

Pankaj Vazirani

Charles Rackmil

Tom Harris

A vehicle exhaust system including an exhaust pipe section, a selective catalytic reduction (SCR) catalyst, and a burner assembly, connected to the exhaust pipe section at a position upstream of the selective catalytic reduction (SCR) catalyst, for pre-heating the exhaust system prior to engine start-up. The burner assembly includes a burner with a combustion chamber and a connecting tube that extends between the burner and the exhaust pipe section. A metallic mesh filter element is located inside the connecting tube and/or a catalytic washcoat is disposed on an inner surface of the connecting tube to reduce emissions of the burner assembly at start-up. The catalytic washcoat comprises a mixture of a support material and a catalyst material that chemically reacts with emissions generated by the burner to reduce the amount of burner produced emissions released from the exhaust system during pre-heating.

Selective catalytic reduction catalyst pre-heating burner assembly and method of controlling burner emissions

An exhaust control system of a vehicle includes a fuel injector configured to inject fuel into a combustion chamber of a burner of an exhaust system upstream of a selective catalytic reduction (SCR) catalyst; an air pump configured to pump air into the combustion chamber of the burner; a spark plug configured to ignite an air/fuel mixture within the combustion chamber of the burner; a fuel control module configured to, while an engine is off before an engine startup, selectively actuate the fuel injector and begin fuel injection; a pump control module configured to, while the engine is off before the engine startup, selectively turn on the air pump; and a spark control module configured to, while the engine is off and before the engine startup, selectively apply power to the spark plug and begin providing spark.

Selective catalytic reduction catalyst pre-heating and exhaust burner air control

A system includes an engine having multiple cylinders and an exhaust manifold. A fuel delivery device and an igniter are disposed in the exhaust manifold. The fuel delivery device injects a fuel into the exhaust manifold. The system also includes an exhaust aftertreatment setup in fluid communication with the exhaust manifold, and a controller in communication with the multiple cylinders, the fuel delivery device and the igniter. The controller is configured to deactivate at least one cylinder to provide air to the exhaust manifold, and control the fuel delivery device to provide the fuel within the exhaust manifold such that the fuel and the air from the at least one deactivated cylinder forms a mixture within the exhaust manifold. The controller is configured to control the igniter to ignite the mixture to generate combustion products within the exhaust manifold for heating the exhaust aftertreatment setup.

System and method for controlling an engine

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Ann Arbor, MI, United States of America

Matthew Muhleck