Abstract: A method for controlling combustion mode transitions for an engine of a hybrid powertrain includes commanding an increase in engine torque, adjusting motor torque output from a torque machine responsive to the operator torque request and the commanded increase in engine torque, executing the combustion mode transition, and operating the torque machine in a torque reclamation state.

Abstract: A method for managing an exhaust aftertreatment system within a vehicle including a catalyst device includes monitoring a digital map device providing a predicted vehicle operating condition through a travel route, and determining a predicted exhaust gas temperature profile based upon the monitoring of the digital map device. Operation of the catalyst device is controlled based upon the predicted exhaust gas temperature profile.

Abstract: A method for controlling a direct injection internal combustion engine and a torque machine configured to transfer torque to a driveline responsive to an operator torque request includes operating the direct injection internal combustion engine to transfer torque to the driveline, monitoring the operator torque request, determining a time constant associated with the operator torque request, detecting a fast transient condition associated with the operator torque request, providing a restricted engine torque command as a function of the operator torque request and the time constant, and during fast transient conditions controlling engine operation to achieve the restricted engine torque command, and operating the torque machine responsive to a motor torque command, the motor torque command corresponding to a difference between the operator torque request and the restricted engine torque command.

Abstract: A method for operating a vehicle includes estimating expected states and probable ranges for influence factors associated with stochastic parameters over a time horizon. A preferred control state and a candidate control state for an objective function are determined. The objective function is controlled using the preferred control state for the objective function over the time horizon.

Abstract: Combustion mode transitions in a hybrid powertrain are managed by coordinated control of engine valve train, engine fueling and electric machine torque generation.

Abstract: A multi-cylinder internal combustion engine is operative in a controlled auto-ignition combustion mode. The operation includes monitoring engine operation, and globally adapting fueling for all the cylinders based upon an engine intake mass air flow and an air/fuel ratio. The fueling for each cylinder is individually adapted based upon states of a combustion parameter for all the cylinders.

Abstract: A method for operating an internal combustion engine configured to operate in a controlled auto-ignition combustion mode and equipped with a mass airflow metering device includes monitoring an engine combustion state, monitoring states of engine operating parameters, calculating a nominal intake air mass flowrate corresponding to the states of the engine operating parameters, estimating an intake air mass flowrate corresponding to the nominal intake air mass flowrate and the engine combustion state, measuring intake air mass flowrate with the mass airflow metering device, comparing the estimated and measured intake air mass flowrates, and detecting a fault related to the mass airflow metering device when a difference between the estimated and measured intake air mass flowrates exceeds a predetermined threshold.

Abstract: A method for improving energy efficient operation of a vehicle includes monitoring vehicle operating characteristics, modeling operation of the vehicle by utilizing the vehicle operating characteristics to estimate energy consumption rates of the vehicle across an allowable vehicle operating range, and generating a control output to the vehicle on the basis of the energy consumption rates.

Abstract: A method for indicating a non-urea reductant fault in a powertrain including an internal combustion engine and an aftertreatment system having an aftertreatment device utilizing a catalyst to convert NOx includes monitoring a NOx content exiting the aftertreatment system subsequent to a powertrain start-up event through a test span, monitoring a measure of NOx content entering the aftertreatment system subsequent to a powertrain start-up event through the test span, and determining a measure of NOx conversion accomplished in the aftertreatment device based upon the NOx content exiting the aftertreatment system and the measure of NOx content entering the aftertreatment system. The method includes, through the test span, comparing the measure of NOx conversion determined at a start of the test span to the measure of NOx conversion at a later time within the test span.

Abstract: A method for controlling combustion mode transitions for an engine of a hybrid powertrain includes commanding an increase in engine torque, adjusting motor torque output from a torque machine responsive to the operator torque request and the commanded increase in engine torque, executing the combustion mode transition, and operating the torque machine in a torque reclamation state.

Abstract: A method of operating a vehicular powertrain including an internal combustion engine includes monitoring map preview information, determining a projected vehicle path based upon the map preview information, determining likely engine operation demands along the projected vehicle path, wherein the likely engine operation demands include likely required engine speeds and likely required engine loads, determining selectable engine operating modes at each likely engine operating demand, and executing engine operation based upon the selectable engine operating modes.

Abstract: A method for controlling a direct injection internal combustion engine and a torque machine configured to transfer torque to a driveline responsive to an operator torque request includes operating the direct injection internal combustion engine to transfer torque to the driveline, monitoring the operator torque request, determining a time constant associated with the operator torque request, detecting a fast transient condition associated with the operator torque request, providing a restricted engine torque command as a function of the operator torque request and the time constant, and during fast transient conditions controlling engine operation to achieve the restricted engine torque command, and operating the torque machine responsive to a motor torque command, the motor torque command corresponding to a difference between the operator torque request and the restricted engine torque command.

Abstract: Combustion mode transitions in a hybrid powertrain are managed by coordinated control of engine valve train, engine fueling and electric machine torque generation.

Abstract: A method for operating an internal combustion engine configured to operate in a controlled auto-ignition combustion mode and equipped with a mass airflow metering device includes monitoring an engine combustion state, monitoring states of engine operating parameters, calculating a nominal intake air mass flowrate corresponding to the states of the engine operating parameters, estimating an intake air mass flowrate corresponding to the nominal intake air mass flowrate and the engine combustion state, measuring intake air mass flowrate with the mass airflow metering device, comparing the estimated and measured intake air mass flowrates, and detecting a fault related to the mass airflow metering device when a difference between the estimated and measured intake air mass flowrates exceeds a predetermined threshold.

Abstract: A method for controlling EGR gas flow in an internal combustion engine during ongoing operation includes determining an engine operating point and a preferred EGR fraction for a cylinder charge based upon the engine operating point. A feed-forward command for controlling an external EGR gas flowrate to an engine intake manifold based upon the preferred EGR fraction for the cylinder charge is determined. An EGR ratio in the intake manifold is determined. And, the external EGR gas flowrate is controlled based upon the estimated EGR ratio in the intake manifold and the feed-forward command for controlling the external EGR gas flowrate.

Abstract: There is provided a method and executable code for controlling operation of a vehicle. The vehicle control occurs during ongoing operation subsequent to deactivating an internal combustion engine which is effective to generate vehicle tractive torque. The method comprises: monitoring conditions external to the vehicle, and, restarting the internal combustion engine when the monitored external conditions indicate an imminent opportunity to move the vehicle in a forward direction.

Abstract: An internal combustion engine includes a controllable throttle control device and controllable engine valves. A method for controlling the engine includes monitoring engine operation and an exhaust gas feedstream, and estimating a cylinder charge temperature based upon the monitored engine operation. Oxygen concentration of the cylinder charge is determined based upon the monitored exhaust gas feedstream, and preferred oxygen concentration of the cylinder charge and preferred cylinder charge temperature are determined. The engine valves are controlled based upon the preferred oxygen concentration of the cylinder charge, the preferred cylinder charge temperature, the oxygen concentration of the cylinder charge, and the estimated cylinder charge temperature.

Abstract: A method for indicating a non-urea reductant fault in a powertrain including an internal combustion engine and an aftertreatment system having an aftertreatment device utilizing a catalyst to convert NOx includes monitoring a NOx content exiting the aftertreatment system subsequent to a powertrain start-up event through a test span, monitoring a measure of NOx content entering the aftertreatment system subsequent to a powertrain start-up event through the test span, and determining a measure of NOx conversion accomplished in the aftertreatment device based upon the NOx content exiting the aftertreatment system and the measure of NOx content entering the aftertreatment system. The method includes, through the test span, comparing the measure of NOx conversion determined at a start of the test span to the measure of NOx conversion at a later time within the test span.

Abstract: There is provided a method for controlling engine valves of an internal combustion engine adapted to selectively operate at one of a first open position and a second open position, including controlling engine operation during a transition from a first to a second combustion mode. The method comprises determining a desired engine airflow based upon an operator torque request. A cylinder intake volume is determined for the desired engine airflow when operating at the first open position. A control scheme is determined to control the engine valves to attain the cylinder intake volume for the desired engine airflow when operating at the second open position. The control scheme is executed and the engine valve is transitioned to the second open position when the cylinder intake volume to operate at the second open position is within a range of authority of the engine valves.

Abstract: A method for managing an exhaust aftertreatment system within a vehicle including a catalyst device includes monitoring a digital map device providing a predicted vehicle operating condition through a travel route, and determining a predicted exhaust gas temperature profile based upon the monitoring of the digital map device. Operation of the catalyst device is controlled based upon the predicted exhaust gas temperature profile.