Abstract: A method is provided for compensating for factors affecting particulate matter accumulation within an aftertreatment element of an engine exhaust system. The method comprises determining rate of change of flow resistance through the aftertreatment element with time. Regeneration is periodically initiated to reduce particulate matter accumulation within the aftertreatment element. Rate of change of flow resistance through the aftertreatment element over time is correlated with at least a model of particulate matter accumulation within the aftertreatment element and a model of regeneration frequency of the aftertreatment element, based on predetermined values for particulate matter accumulation and regeneration frequency. Action, at least including increasing regeneration frequency, is initiated to compensate for an increased rate of particulate matter accumulation in the aftertreatment element.

Abstract: A method is provided for compensating for variability in ash accumulation rates within an aftertreatment element of an engine exhaust system. The method includes determining flow resistance values through the aftertreatment element and tracking minimum flow resistance values over time. The method also includes correlating the tracked minimum flow resistance values over time, with a model of engine oil consumption rate that is based on predetermined values for model engine oil consumption. The method further includes adjusting the predetermined values based on the tracked minimum flow resistance values over time.

Abstract: A power system including an exhaust producing engine, an exhaust system and an exhaust gas recirculation (EGR) system is provided. The EGR system may include an EGR flowpath and an air intake system. The EGR system may also include an EGR valve configured to regulate the flow of exhaust gases through the EGR flowpath. The power system may also include a monitoring system configured to monitor operating parameters of at least two components of the EGR system. The power system may also include a controller configured to determine, based on the monitored operating parameters, a maximum flowrate value for each of the components. Each of the maximum flowrate values may represent the maximum EGR flowrate for that component. The controller may be configured to control the EGR valve, based on the maximum flowrate values, to result in an EGR flowrate no greater than the lowest of the maximum flowrate values.

Abstract: A power system including an exhaust producing engine, an exhaust system and an exhaust gas recirculation (EGR) system is provided. The EGR system may include an EGR flowpath and an air intake system. The EGR system may also include an EGR valve configured to regulate the flow of exhaust gases through the EGR flowpath. The power system may also include a monitoring system configured to monitor operating parameters of at least two components of the EGR system. The power system may also include a controller configured to determine, based on the monitored operating parameters, a maximum flowrate value for each of the components. Each of the maximum flowrate values may represent the maximum EGR flowrate for that component. The controller may be configured to control the EGR valve, based on the maximum flowrate values, to result in an EGR flowrate no greater than the lowest of the maximum flowrate values.

Abstract: An exhaust gas recirculation system is provided, including an exhaust gas recirculation flowpath configured to route a portion of exhaust gases produced by an engine back to an air intake of the engine. The system may also include an exhaust gas recirculation valve configured to regulate the flow of exhaust gases through the exhaust gas recirculation flowpath. In addition, the system may include a flow detection device configured to determine the flowrate of exhaust gases through the exhaust gas recirculation flowpath. The system may further include a controller configured to control the exhaust gas recirculation valve.

Abstract: A method for controlling exhaust emissions is disclosed. The method includes producing exhaust having hydrocarbons and directing the exhaust through a converter. The method also includes directing the exhaust from the converter to an environment and determining a first rate indicative of a rate of hydrocarbons directed to the environment. The method further includes comparing the first rate with a predetermined rate and adjusting the production of exhaust, if the first rate is greater than the predetermined rate.

Abstract: A method of initially operating an internal combustion engine including operating the engine in a start-up mode is provided. The start-up mode includes injecting at least two fuel pre-shots wherein a first of the fuel pre-shots is smaller in quantity than a last of the fuel pre-shots. An engine is provided including an electronic controller with a computer readable medium having a control algorithm recorded thereon, the control algorithm including means for commanding injection of a main fuel shot and at least two fuel pre-shots wherein a first of the fuel pre-shots is smaller in quantity than a last of the fuel pre-shots.

Abstract: A method, system and machine-readable storage medium for monitoring an engine using a cascaded neural network that includes a plurality of neural networks is disclosed. In operation, the method, system and machine-readable storage medium store data corresponding to the cascaded neural network. Signals generated by a plurality of engine sensors are then inputted into the cascaded neural network. Next, a second neural network is updated at a first rate, with an output of a first neural network, wherein the output is based on the inputted signals. In response, the second neural network outputs at a second rate, at least one engine control signal, wherein the second rate is faster than the first rate.

Abstract: A method, system, and machine-readable storage medium for determining a predetermined operating condition of an internal combustion engine are disclosed. In operation, the method, system and machine-readable storage medium measure a cylinder pressure in at least one combustion chamber at a predetermined point in a combustion cycle. Next, the method, system, and machine-readable storage medium determine at least a first value for an operating parameter of the engine using the measured cylinder pressure, determine a second value for the operating parameter of the engine using data received from at least one engine sensor, and then generate a predetermined signal if a difference between the first value and the second value has a predetermined relationship.