Abstract: An apparatus includes a housing and at least one substrate enclosed within the housing and extending along an axis. The substrate includes at least one internal open area that is of a predetermined size and at a predetermined location within the substrate. At least one heater is configured to heat the at least one substrate by directing heat into the at least one internal open area.

Abstract: A vehicle exhaust system includes an exhaust pipe defining an exhaust gas flow path, a heat recovery device connected to the exhaust pipe, and a diverter valve that controls exhaust gas flow between the exhaust pipe and heat recovery device. The diverter valve is moveable between at least a heat recovery mode where the diverter valve blocks flow through the exhaust pipe and directs flow into the heat recovery device, a full bypass acoustic mode where the diverter valve blocks flow through the heat recovery device and directs flow through the exhaust pipe, a transition mode where the diverter valve partially blocks flow through the heat recovery device and partially blocks flow through the exhaust pipe, and a partial bypass acoustic mode where the diverter valve blocks flow through the heat recovery device and partially blocks flow through the exhaust pipe.

Abstract: An automotive exhaust aftertreatment system includes a reducing agent mixer. The reducing agent mixer includes a mixer body and doser that injects a reducing agent into the mixer body. The reducing agent mixer mixes an exhaust stream and the reducing agent prior to the exhaust stream being discharged from the reducing agent mixer.

Abstract: A reductant generator includes a housing defining a chamber, an inlet to direct engine exhaust gas into the chamber, a moveable member that receives driving input from an engine and which is configured to compress engine exhaust gases within the chamber, and a supply to provide a fluid into the chamber to be transformed into reductant. The generator also includes an outlet from which the reductant is directed into an exhaust system.

Abstract: A vehicle exhaust system includes a first component that receives exhaust gas output from an engine and a second component that is fluidly coupled to the first component to define an upstream portion of a vehicle exhaust system. A vehicle frame member includes an internal acoustic volume. A pipe connects the internal acoustic volume in parallel to the upstream portion of the vehicle exhaust system.

Abstract: The present disclosure relates to mixing devices included in automotive exhaust treatment systems. More particularly, the present disclosure relates to reducing agent mixers for mixing reducing agents with exhaust streams to induce a chemical reaction between the reducing agent and exhaust gasses to reduce Nitrous Oxides (NOx) in the exhaust gas. Reducing agent mixers in accordance with the present disclosure include reducing agent delivery devices for conducting reducing agents into an internal mixing space through which exhaust gasses flow.

Abstract: An exhaust component assembly includes a heat shield formed from a composite material and a mounting structure that attaches the heat shield to an outer housing of an exhaust component. The mounting structure comprises an insulator located between an outer surface of the outer housing an inner surface of the heat shield. A method of assembling the composite heat shield to the outer housing of the exhaust component assembly is also disclosed.

Abstract: An exhaust aftertreatment system for use with over-the-road vehicle is disclosed. The exhaust aftertreatment system includes a reducing agent mixer with a mixing can and a flash-boil doser configured to inject heated and pressurized reducing agent into the mixing can for distribution throughout exhaust gases passed through the mixing can.

Abstract: A vehicle includes an exhaust aftertreatment system for use with an automotive internal combustion engine. The system includes a reducing agent mixer configured to deliver a reducing agent for mixing with exhaust gases produced by the engine. The reducing agent mixer includes a mixing can defining an internal space, a doser configured to inject the reducing agent toward the internal space, and a reducing agent delivery device configured to direct the reducing agent into the internal space.

Abstract: A vehicle includes an exhaust aftertreatment system for use with an automotive internal combustion engine. The system includes a reagent mixer configured to deliver a reagent for mixing with exhaust gases produced by the engine. The reagent mixer includes a flow-redirection housing defining an mixing chamber and a manifold coupled downstream of the flow-redirection housing. A doser is mounted to the flow-redirection housing and is configured to inject the reagent toward the mixing chamber.

Abstract: An exhaust system includes an exhaust duct having an internal surface defining an exhaust gas passage extending along an axis. At least one sensor opening is in the exhaust duct and is configured to receive an exhaust gas sensor. A wall is positioned within the exhaust gas passage to extend at least partially around the at least one sensor opening. The wall has an inner wall surface defining an internal volume. A plurality of inlet pipes are in fluid communication with the internal volume, and each inlet pipe extends from a first end open to the internal volume to a second end that is distal from the first end. Each inlet pipe includes a plurality of inlet apertures.

Abstract: An exhaust component assembly includes a heat shield and a mounting structure to attach the heat shield to an outer housing of an exhaust component. The mounting structure comprises a primary insulator located between an outer surface of the outer housing and an inner surface of the heat shield and at least one secondary insulator positioned adjacent to the primary insulator. A method of assembling the heat shield to the outer housing of the exhaust component assembly is also disclosed.

Abstract: An exhaust aftertreatment system for use with an automotive diesel engine, the system includes a selective catalytic reduction unit a reagent storage tank, and a reagent distribution system. A reagent fluid is stored in the reagent storage tank. The reagent is delivered to exhaust gases produced by the engine using the reagent distributor. The selective catalytic reduction unit is positioned downstream of the reagent distributor and is configured to remove effluents from the exhaust gases.

Abstract: An exhaust component assembly includes a first exhaust component extending along a first axis, a second exhaust component extending along a second axis, and a mixer having a mixer inlet portion connected to an outlet from the first exhaust component and a mixer outlet portion connected to an inlet to the second exhaust component. A flexible connection couples the mixer inlet portion to the mixer outlet portion.

Abstract: An over-the-road vehicle including an engine unit and an engine-integrated exhaust treatment system is disclosed. The engine-integrated exhaust treatment system can selectively reduce nitrous oxides (NOx) in exhaust gases from the engine unit. The engine-integrated exhaust treatment system includes a reagent doser integrated into the engine unit and a catalyst in fluid communication with the engine unit. The reagent doser injects aqueous urea solution into at least one cylinder of the engine unit without fuel while fuel is injected into at least one other cylinder of the engine unit for combustion. The aqueous urea solution is converted in the cylinder to ammonia gas that is mixed with exhaust gases from the other cylinders. This mixture is then exposed to the catalyst to encourage reduction of NOx in the exhaust gases before they are discharged to atmosphere.

Abstract: An automotive exhaust aftertreatment system for reducing effluents, such as nitrous oxides (NOx), in exhaust gasses passing through the system. The automotive exhaust aftertreatment system includes a dosing unit configured to inject primary and secondary reductant fluids into exhaust gasses based on various strategies to optimize operation of the system.

Abstract: A mixer for a vehicle exhaust system includes an outer housing that defines an internal cavity, an inlet pipe that directs exhaust gas into the internal cavity, and an outlet baffle. The outer housing includes a doser opening configured to receive a doser. The outlet baffle directs a mixture of the exhaust gas and a reducing agent injected by the doser into a downstream exhaust component. A deflector deflects exhaust gas exiting the inlet pipe to mix with the reducing agent prior to entering the downstream exhaust component.

Abstract: A vehicle exhaust system includes a first exhaust after-treatment module that receives engine exhaust gases and a second exhaust after-treatment module that is downstream of the first exhaust after-treatment module. A valve is moveable between an open position that blocks flow to the first exhaust after-treatment module such that all exhaust gas flow bypasses the first exhaust after-treatment module and is directed into the second exhaust after-treatment module, a closed position that directs flow into the first exhaust after-treatment module before the flow enters the second exhaust after-treatment module, and a partially open position where one portion of flow is directed into the first exhaust after-treatment module and a remaining portion of flow is directed into the second exhaust after-treatment module. A controller controls movement of the valve between the open, closed, and partially open positions based on at least one of engine flow rate and NOx output.

Abstract: An exhaust system includes a first exhaust after-treatment system receiving exhaust gases generated by an engine, a second exhaust after-treatment system downstream of the first exhaust after-treatment system, and at least one bypass connecting an engine outlet to an inlet to the second exhaust after-treatment system. A turbocharger is associated with the bypass and a bypass valve is located upstream of the turbocharger. The bypass valve is moveable between an open position to bypass exhaust gas flow to the first exhaust after-treatment system, a closed position to direct all exhaust gas flow to the first exhaust after-treatment system, and a partially open position where one portion of exhaust gas flow is directed into the first exhaust after-treatment system and a remaining portion of exhaust gas flow is directed into the turbocharger. A controller controls movement of the bypass valve between the open, closed, and partially open positions.

Abstract: An automotive vehicle includes an exhaust aftertreatment system. The exhaust aftertreatment system includes a mixer, a doser that injects a reducing agent into the mixer, and a selective catalytic reduction unit. The exhaust aftertreatment system mixes exhaust gases and the reducing agent for treatment prior to the exhaust gases being discharged into the atmosphere. Some components of the exhaust aftertreatment system are positioned proximate to an associated combustion engine to minimize thermal energy loss from the exhaust gases prior to interaction with the exhaust aftertreatment system.