A mixer assembly comprises a tubular housing including a reductant inlet, an exhaust gas inlet and an exhaust gas outlet. The tubular housing defines a longitudinal axis along which exhaust enters the housing. The reductant inlet is positioned on a first side of the tubular housing. An upstream element covers approximately one-half of the cross sectional area of the enhaust gas inlet and is positioned upstream of the reductant inlet. An upstream surface of the upstream mixing element directs exhaust gas flow transversly toward the reductant inlet. A downstream mixing element along with the upstream mixing element at least partially defines a reductant receiving duct in which injected reductant and exhaust gas mix.

A cooling device includes: a first port into which coolant flows; a first passage connected to the first port and extending to a periphery of a tip portion of an injection valve; a second port provided above the first port, through which the coolant flows out; a second passage connected to the first passage and extending from the periphery of the tip portion and connected to the second port; and a movable member configured to move in response to a flow of the coolant within a height between the first port and the second port to communicate the first passage and the second passage with each other when a flow rate of the coolant is lower than a predetermined flow rate and to disconnect the first passage and the second passage from each other when the flow rate of the coolant is higher than the predetermined flow rate.

Methods and systems are provided for an exhaust gas mixer. In one example, a system may include a mixer configured to alter exhaust gas flow.

Systems and methods for removing deposit in an aftertreatment system for an engine are disclosed herein. The method comprises determining an amount of deposits accumulated in the aftertreatment system, determining combustion targets for the engine in response to determining the amount of deposits exceeds a deposit threshold, and modulating an air mass flow for the engine based on the determined combustion targets. The air mass flow can be modulated by changing the position of the wastegate or the geometry of the variable geometry turbine (VGT).

A cooling system is for a marine engine. The cooling system has a cooling fluid conduit that is configured to convey cooling fluid for cooling at least one component of the marine engine; a strainer disposed in the cooling fluid conduit and configured to strain the cooling fluid; and a quick connector that is manually operable to connect and disconnect the strainer from the cooling fluid conduit.

A system includes an exhaust conduit coupled, at least first end of the exhaust conduit, to an internal combustion; a catalytic converter coupled to a second end of the exhaust conduit; and electromagnetic wave source configured to emit electromagnetic energy; and a wave guide, coupled at a first end to the electromagnetic wave source and at a second end to the exhaust conduit, and extending between the electromagnetic wave source and the exhaust conduit. The electromagnetic wave source is configured to provide the electromagnetic energy, via the wave guide, to exhaust gas traveling through the exhaust conduit.

Methods and systems are provided for a particulate filter comprising a pretreatment. In one example, a method may include applying a pretreatment to an unused particulate filter, wherein the particulate filter is subjected to incomplete oxidation conditions following application of the pretreatment.

An emissions treatment apparatus includes a first mechanism arranged to receive an exhaust gas, wherein the first mechanism is supplied with a first substance arranged to react with a first exhaust compound to process the exhaust gas, the first substance being chemically derived from an electrolyte source. The emissions treatment apparatus further comprises a second mechanism arranged to receive the exhaust gas after its reaction with the first exhaust compound; wherein the second mechanism receives a second substance arranged to react with a second exhaust compound to further process the exhaust gas, the second substance being chemically derived from an electrolyte source.

This invention relates to exhaust replication systems and methods, such as systems for testing automotive exhaust aftertreatment devices. More particularly, methods for steady state and transient generation and flow of NO.sub.2 and/or NO from a fluid such as nitric acid for introduction into the burner-based exhaust replication system.

A boat drive including combustion engine located within the hull and a drive unit located outside the hull. The drive has a propeller shaft and an exhaust system with an exhaust duct and an outlet. The exhaust duct connects the engine to the exhaust outlet for carrying away exhaust gases from the engine and cooling water introduced into the exhaust duct. The exhaust outlet is arranged in the propeller shaft. A first exhaust release opening is arranged in the exhaust duct, between the engine and the exhaust outlet, so that during operation, a first fraction of the exhaust gases and cooling water is discharged through the first exhaust release opening, while a second fraction of the exhaust gases and the cooling water is discharged through the exhaust outlet. A device is provided for adjusting the first fraction that can be discharged through the first exhaust release opening.