Abstract: A method and system for treating exhaust emitted via an exhaust line from a diesel engine. A POC system is installed on the exhaust line, and has at least one diesel oxidation catalyst (DOC), a set of two or more particulate oxidation catalyst (POC) elements, a first differential pressure sensor (?P1) to measure the pressure difference across the first and all but the last POC elements, and a second differential pressure sensor (?P2) to measure pressure differences across the last POC element. During operation of the engine, ?P1 is monitored to determine whether its POC elements require active regeneration, and ?P2 is separately monitored to determine whether its (the last) POC element requires active regeneration.

Abstract: A method and system for treating exhaust emitted via an exhaust line from a diesel engine. A POC system is installed on the exhaust line, and has at least one diesel oxidation catalyst (DOC), a set of two or more particulate oxidation catalyst (POC) elements, a first differential pressure sensor (?P1) to measure the pressure difference across the first and all but the last POC elements, and a second differential pressure sensor (?P2) to measure pressure differences across the last POC element. During operation of the engine, ?P1 is monitored to determine whether its POC elements require active regeneration, and ?P2 is separately monitored to determine whether its (the last) POC element requires active regeneration.

Abstract: An exhaust gas emissions aftertreatment system for spark-ignition engines, which simultaneously reduces the particulate matter, HC, CO, and NOx content of the exhaust. Various embodiments of the system have both a closely-coupled TWC device, and an under-floor treatment device. The under-floor device has either TWC or NOx reduction functionality, depending on whether the engine is run under stiochiometric or lean burn operating conditions.

Abstract: An exhaust gas emissions aftertreatment system for spark-ignition engines, which simultaneously reduces the particulate matter, HC, CO, and NOx content of the exhaust. Various embodiments of the system have both a closely-coupled TWC device, and an under-floor treatment device. The under-floor device has either TWC or NOx reduction functionality, depending on whether the engine is run under stiochiometric or lean burn operating conditions.

Abstract: A wall-flow exhaust gas emissions aftertreatment device for simultaneously reducing the particulate matter and NOx content of the exhaust. The device comprises a number of longitudinal inlet channels and outlet channels, the inlet channels being plugged at the exit face, and the outlet channels being plugged at the entry face. The interiors of the inlet channels are coated with a particulate matter catalyst coating, and the interiors of the outlet channels are coated with a selective catalyst reduction catalyst coating.