Abstract: A method and system for operating a vehicle that includes a plurality of engine starting devices and an internal combustion engine is described. In one example, the method selects one of a plurality of engine starting devices to start an engine based on durability metrics of each of the plurality of engine starting devices. In addition, engine starting device selection may be based on calibration parameters that are generated via a server that is external to the vehicle.

Abstract: A method and system for operating a vehicle that includes a plurality of engine starting devices and an internal combustion engine is described. In one example, the method selects one of a plurality of engine starting devices to start an engine based on durability metrics of each of the plurality of engine starting devices. In addition, engine starting device selection may be based on calibration parameters that are generated via a server that is external to the vehicle.

Abstract: Systems and methods for a twin turbocharged engine with a single exhaust gas recirculation (EGR) system are disclosed. In one example approach a system is provided comprising a first turbocharger in a first intake passage with a low-pressure EGR system fluidically coupling exhaust exiting the first turbocharger to intake air entering the first turbocharger, and a second turbocharger in a second intake passage without a low-pressure EGR system fluidically coupling exhaust exiting the second turbocharger to intake air entering the second turbocharger.

Abstract: A method is provided for controlling EGR flow in turbocharged engine. The method comprises operating a low-pressure exhaust gas recirculation (LP-EGR) system at a fixed EGR percentage rate of fresh airflow from mid-load down to a minimum engine load, even as load changes. In this way, errors in the delivered LP-EGR rate during transient conditions may be alleviated by providing a fixed EGR percentage of fresh airflow at all engine loads within a fixed mode range.

Abstract: A method for controlling combustion in a cylinder of a turbocharged engine in which intake air is reserved upstream of the cylinder. The method comprises decreasing an internal EGR rate in the cylinder during a tip-out condition if the temperature of the intake air is above a threshold, and increasing the internal EGR rate in the cylinder during a tip-out condition if the temperature of the intake air is below the threshold.

Abstract: Methods and systems are provided for controlling exhaust emissions by adjusting a fuel injection into an engine cylinder from a plurality of fuel injectors based on the fuel type of the injected fuel and further based on the soot load of the engine. Soot generated from direct fuel injection is reduced by decreasing an amount of direct injection into a cylinder as the engine soot load increases.

Abstract: Systems and methods for a twin turbocharged engine with a single exhaust gas recirculation (EGR) system are disclosed. In one example approach a system is provided comprising a first turbocharger in a first intake passage with a low-pressure EGR system fluidically coupling exhaust exiting the first turbocharger to intake air entering the first turbocharger, and a second turbocharger in a second intake passage without a low-pressure EGR system fluidically coupling exhaust exiting the second turbocharger to intake air entering the second turbocharger.

Abstract: Methods and systems are provided for controlling exhaust emissions by adjusting a fuel injection into an engine cylinder from a plurality of fuel injectors based on the fuel type of the injected fuel and further based on the soot load of the engine. Soot generated from direct fuel injection is reduced by decreasing an amount of direct injection into a cylinder as the engine soot load increases.

Abstract: Methods and systems are provided for controlling exhaust emissions by adjusting a fuel injection into an engine cylinder from a plurality of fuel injectors based on the fuel type of the injected fuel and further based on the soot load of the engine. Soot generated from direct fuel injection is reduced by decreasing an amount of direct injection into a cylinder as the engine soot load increases.

Abstract: Methods and systems are provided for controlling exhaust emissions by adjusting a fuel injection into an engine cylinder from a plurality of fuel injectors based on the fuel type of the injected fuel and further based on the soot load of the engine. Soot generated from direct fuel injection is reduced by decreasing an amount of direct injection into a cylinder as the engine soot load increases.

Abstract: A method is provided for controlling EGR flow in turbocharged engine. The method comprises operating a low-pressure exhaust gas recirculation (LP-EGR) system at a fixed EGR percentage rate of fresh airflow from mid-load down to a minimum engine load, even as load changes. In this way, errors in the delivered LP-EGR rate during transient conditions may be alleviated by providing a fixed EGR percentage of fresh airflow at all engine loads within a fixed mode range.

Abstract: Methods and systems are provided for controlling exhaust emissions by adjusting a fuel injection into an engine cylinder from a plurality of fuel injectors based on the fuel type of the injected fuel and further based on the soot load of the engine. Soot generated from direct fuel injection is reduced by decreasing an amount of direct injection into a cylinder as the engine soot load increases.

Abstract: A method for controlling combustion in a cylinder of a turbocharged engine in which intake air is reserved upstream of the cylinder. The method comprises decreasing an internal EGR rate in the cylinder during a tip-out condition if the temperature of the intake air is above a threshold, and increasing the internal EGR rate in the cylinder during a tip-out condition if the temperature of the intake air is below the threshold.

Abstract: Methods and systems are provided for controlling exhaust emissions by adjusting a fuel injection into an engine cylinder from a plurality of fuel injectors based on the fuel type of the injected fuel and further based on the soot load of the engine. Soot generated from direct fuel injection is reduced by decreasing an amount of direct injection into a cylinder as the engine soot load increases.

Abstract: A fuel delivery system for an internal combustion engine and a method of operating the fuel delivery system are provided. An example embodiment of the method includes: transferring at least some fuel from a first fuel storage region to a second fuel storage region via a pump during a first condition; draining at least some fuel from the second fuel storage region to the first storage fuel region via gravity during a second condition; and delivering fuel from the first fuel storage region to a first fuel injector of a cylinder of the internal combustion engine; and delivering fuel from the second fuel storage region to a second fuel injector of the cylinder.

Abstract: A fuel delivery system for an internal combustion engine and a method of operating the fuel delivery system are provided. An example embodiment of the method includes: transferring at least some fuel from a first fuel storage region to a second fuel storage region via a pump during a first condition; draining at least some fuel from the second fuel storage region to the first storage fuel region via gravity during a second condition; and delivering fuel from the first fuel storage region to a first fuel injector of a cylinder of the internal combustion engine; and delivering fuel from the second fuel storage region to a second fuel injector of the cylinder.

Abstract: A fuel delivery system for an internal combustion engine and a method of operating the fuel delivery system are provided. An example embodiment of the method includes: transferring at least some fuel from a first fuel storage region to a second fuel storage region via a pump during a first condition; draining at least some fuel from the second fuel storage region to the first storage fuel region via gravity during a second condition; and delivering fuel from the first fuel storage region to a first fuel injector of a cylinder of the internal combustion engine; and delivering fuel from the second fuel storage region to a second fuel injector of the cylinder.

Abstract: A system, comprising of an engine having a cylinder therein, a fuel injector coupled to said cylinder and configured to directly inject fuel into said cylinder, a fuel system coupled to said injector, and a controller configured to control engine starting operation, wherein during a start, said fuel injector performs a first fuel injection at least partially during an exhaust stroke of said cylinder, where fuel from said first fuel injection is mixed with air inducted at least during an intake stroke following said exhaust stroke, said fuel injector performing a second fuel injection after said first fuel injection, and combusting fuel from said first and second fuel injections to perform a combustion event in said cylinder.

Abstract: A system, comprising of an engine having a cylinder therein, a fuel injector coupled to said cylinder and configured to directly inject fuel into said cylinder, a fuel system coupled to said injector, and a controller configured to control engine starting operation, wherein during a start, said fuel injector performs a first fuel injection at least partially during an exhaust stroke of said cylinder, where fuel from said first fuel injection is mixed with air inducted at least during an intake stroke following said exhaust stroke, said fuel injector performing a second fuel injection after said first fuel injection, and combusting fuel from said first and second fuel injections to perform a combustion event in said cylinder.