General Electric Company

James Kristopher Von Der Ehe

Maruthi Narasinga Rao Devarakonda

Dennis John Spaulding

Julian Richard Knudsen

Robert Earl McDowell

Yupeng Xiong

Troy Christopher Gosselin

Aspects of the disclosure include a system for controlling an exhaust gas communicated from an engine system to a turbine component of a turbocharger system. The system can include an engine having an operational speed; a turbocharger system including a turbine component, the exhaust gas being output from the engine in an exhaust line; a controller in communication with the engine; and a sensor disposed in the exhaust line being in communication with the controller, the system operating according to the following method: measuring the first temperature of the exhaust gas, determining if the measured first temperature of the exhaust gas is within a temperature safety window of the system; calculating an engine speed of the engine; and adjusting an engine speed setpoint and speed of the engine based on the measured first temperature and the calculated engine speed.

System and program product for controlling exhaust gas temperature of engine system

A system includes a controller configured to compare a nitrogen oxides (NO) concentration within treated exhaust gases from a combustion engine after flowing through a first catalyst assembly and a second catalyst assembly relative to a NOthreshold value, to determine a change in Oconcentration within the treated exhaust gases between the first and second catalyst assemblies upstream of a location of oxidant injection into the treated exhaust gases, and to adjust an air-fuel ratio of the combustion engine based on the change in Oconcentration in the treated exhaust gases if the NOconcentration is greater than the NOthreshold value.

Method and system for control of emissions in exhaust aftertreatment system

A system includes an exhaust aftertreatment system configured to treat emissions from a combustion engine. The exhaust aftertreatment system includes a first catalyst assembly having an outlet. The exhaust aftertreatment system also includes an ammonia slip catalyst (ASC) assembly configured to receive a fluid from the first catalyst assembly and to convert ammonia (NH3) within the fluid into nitrogen (N2), wherein the ASC assembly has an inlet. The exhaust aftertreatment system further includes a silencer disposed between the outlet of the first catalyst assembly and the inlet of the ASC assembly, wherein the silencer is configured to receive the fluid and an oxidant for mixing with the fluid provide sufficient oxygen in the fluid flowing into the inlet of the ASC assembly to enable the catalytic activity in the ASC assembly that coverts NH3 into N2, and the silencer is configured to mix the fluid and the oxidant.

Silencer for mid-bed air injection mixing

A passive mid bed air injection apparatus for an engine includes a three way catalyst positioned in an exhaust stream of the engine. The three way catalyst reduces NO, CO and HC from the exhaust stream. The three way catalyst includes an ammonia slip catalyst positioned in the exhaust stream of the engine. The ammonia slip catalyst is positioned downstream from the three way catalyst and oxidizes NHand CO from the exhaust stream. The three way catalyst includes an oxygen input disposed between the three way catalyst and the ammonia slip catalyst such that the oxygen input delivers air downstream from the three way catalyst and upstream from the ammonia slip catalyst. The oxygen input receives the air from a charged side of a forced induction device and delivers the air to the exhaust stream entering the ammonia slip catalyst. An associated method also provided.

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Delafield, WI, United States of America

James Kristopher Von Der Ehe