A particulate filtering apparatus for dry filtering exhaust gases of a diesel engine includes at least two compartments independently arranged in parallel with respect to a flow of the exhaust gases. Each of the compartments is equipped with at least one shut-off valve for regulating the flow of gas passing through the compartment and further includes one or more filters adapted to hold the particulate and an emission device to generate a countercurrent gas pulse flow at the one or more filters. A central control unit operates and controls the at least one shut-off valve and of said emission device. Each of the at least two compartments further includes an injector operably controlled by the central control unit for the inlet of hot gases into the at least two compartments.

A method for operating a drive device includes heating a hot air stream with a heating device integrated in a cylinder head of an internal combustion engine of the drive device, wherein the internal combustion engine is connected with an exhaust gas system; mixing the hot air stream upstream of a catalytic converter with a cold fresh air stream for adjusting a defined temperature of the hot air stream; and supplying the hot air stream having the adjusted defined temperature to the catalytic converter in at least one operating state of the internal combustion engine so as to heat the catalytic converter.

Methods and systems are provided for controlling the temperature and ratio of gases within a gas mixing tank reservoir and selectively charging/discharging gases from the reservoir to one or both of an intake system or an exhaust system. In one example, a method (or system) may include storing exhaust gas and/or compressed intake air into a gas mixing reservoir, and increasing or decreasing flow of coolant to the reservoir based on engine operating conditions. The stored gases may be discharged to an intake system and/or an exhaust system based on requests from a controller, and coolant flow to the reservoir may be adjusted based on the composition of the gases stored within the reservoir.

An exhaust purification system of an internal combustion engine comprising an exhaust treatment catalyst (13) arranged in an engine exhaust passage and a heat and hydrogen generation device (50) able to feed only heat or heat and hydrogen to the exhaust treatment catalyst (13). When the warm-up operation of the heat and hydrogen generation device (50) is completed and a reforming action by a reformer catalyst (54) becomes possible, if the temperature of the exhaust treatment catalyst (13) is a preset activation temperature or more, a partial oxidation reaction is performed at the heat and hydrogen generation device (50) and the generated heat and hydrogen are fed to the exhaust treatment catalyst (50). At this time, if the temperature of the exhaust treatment catalyst (13) is less than the preset activation temperature, a complete oxidation reaction by a lean air-fuel ratio is continued and a heat is fed to the exhaust treatment catalyst (13).

The disclosure relates to an exhaust gas sub-system for an internal combustion engine, having a catalytic converter with an inlet section for introducing an exhaust gas flow into the outer housing and having a feed line for secondary gas, the feed line having an inflow element at the end, which opens at the inlet section, the outer housing has an inlet opening for exhaust gas, an external heating element for heating the secondary gas and for generating hot gas being provided in the feed line upstream of the inflow element, at least one inflow opening in the outer housing being assigned to the inflow element, via which hot gas can be fed into the inlet section.

The disclosure relates to an exhaust gas sub-system for an internal combustion engine, having a catalytic converter with an inlet section for introducing an exhaust gas flow into the outer housing and having a feed line for secondary gas, the feed line having an inflow element at the end, which opens at the inlet section, the outer housing has an inlet opening for exhaust gas, an external heating element for heating the secondary gas and for generating hot gas being provided in the feed line upstream of the inflow element, at least one inflow opening in the outer housing being assigned to the inflow element, via which hot gas can be fed into the inlet section.

A method and device for operating an internal combustion engine including a first air duct supplying air to a cylinder of the internal combustion engine, and a second air duct supplying air to a heater for heating an exhaust system. The first and the second air duct each have at least one control element for controlling the amount of air flowing through. The first and the second air ducts are connected by a third air duct to an air filter for providing filtered ambient air to the internal combustion engine. A mass flow sensor is arranged in the third air duct for measuring an amount of air flowing through the third air duct. The measured signal of the mass flow sensor is used to regulate the amount of air flowing through the first and second air ducts as a function of operating states of the internal combustion engine.

A method and device for controlling emissions of VOC's comprises transporting VOC's to an engine and transporting the exhaust from the engine into a manifold. Supplemental air is transporting into the manifold and heat is transferred from the exhaust to the supplemental air within the manifold. The supplemental air is mixed with the exhaust and the mixture is transferred to a pollution abatement device.

Methods and systems are provided for addressing engine cold-start emissions while an exhaust catalyst is activated. In one example, a method for improving exhaust emissions may include flowing ionized air into an engine exhaust, downstream of an exhaust catalyst, to oxidize exhaust emissions left untreated by the catalyst. The approach reduces the PM load of the exhaust as well as of a downstream particulate matter filter.

A thermal management system for an aftertreatment system includes an air pump and a compressed air rail. The compressed air rail is fluidly connected with the air pump. The thermal management system further includes a first valve located between the compressed air rail and an exhaust outlet pathway. The first valve is configured to selective supply air to the aftertreatment system of the engine. The thermal management system further includes a heater located between the compressed air rail and the first valve. The heater is configured to heat the air before supplying air to the aftertreatment system of the engine.