Abstract: A vehicle control system as described herein can include one or more processors that can identify one or more geographic areas through which a vehicle group is scheduled to travel for an upcoming trip. This area or these areas may be identified as area(s) where there is an increased likelihood of a need for derating one or more engines of the vehicle group. The processor(s) can create or modify a trip plan that dictates one or more operational settings of the vehicle group for one or more of different locations, distances, or times of the upcoming trip. The processor(s) may create or modify the trip plan to avoid a decrease in total power output from the vehicle group within the geographic area(s).

Abstract: A system includes one or more processors configured to predict, using a predictive deration model, that a first vehicle system scheduled to travel along a route will experience a deration event when traveling through one or more designated geographic areas along the route. The predictive deration model is generated based on historical data of deration events experienced by plural vehicle systems. The historical data includes at least geographic locations of the deration events and times of the year in which the deration events occurred. The one or more processors are further configured to generate control signals to control movement of the first vehicle system along the route based on the prediction such that the first vehicle system does not derate when traveling through the one or more designated geographic areas along the route.

Abstract: Systems and methods are provided for controlling exhaust gas recirculation (EGR). In one example, an engine system includes a first EGR valve coupling an exhaust manifold to an engine exhaust system, a second EGR valve coupling the exhaust manifold to an engine intake system, and a control unit. The control unit selectively adjusts a position of the first EGR valve based on a target amount, and adjusts a position of the second EGR valve based on the target amount and a position of the first EGR valve. Responsive to a first degradation condition of the first EGR valve, the control unit adjusts the position of the second EGR valve based on the target amount and based on a pressure of the first exhaust manifold, and responsive to a second degradation condition of the first EGR valve, adjusts the position of the second EGR valve based on the target amount.

Abstract: A system includes one or more processors configured to obtain environmental data geographically and temporally corresponding to scheduled travel of a vehicle system. The one or more processors are further configured to determine a power output capability range for the vehicle system traveling during a trip based on the environmental data that is obtained. The one or more processors are also configured to communicate instructions to at least one of a propulsion system of the vehicle system or a vehicle controller of the vehicle system for controlling movement of the vehicle system during the trip such that the vehicle system produces a power output within the power output capability range as the vehicle system travels. The environmental data includes historical values of one or more of temperature, pressure, or air constituency in geographic areas through which the vehicle system will travel during the trip.

Abstract: Systems and methods are provided for controlling exhaust gas recirculation (EGR). In one example, an engine system includes a first EGR valve coupling an exhaust manifold to an engine exhaust system, a second EGR valve coupling the exhaust manifold to an engine intake system, and a control unit. The control unit selectively adjusts a position of the first EGR valve based on a target amount, and adjusts a position of the second EGR valve based on the target amount and a position of the first EGR valve. Responsive to a first degradation condition of the first EGR valve, the control unit adjusts the position of the second EGR valve based on the target amount and based on a pressure of the first exhaust manifold, and responsive to a second degradation condition of the first EGR valve, adjusts the position of the second EGR valve based on the target amount.

Abstract: Systems and methods are provided for controlling exhaust gas recirculation (EGR). In one example, an engine system includes a first EGR valve coupling an exhaust manifold to an engine exhaust system, a second EGR valve coupling the exhaust manifold to an engine intake system, and a control unit. The control unit selectively adjusts a position of the first EGR valve based on a target amount, and adjusts a position of the second EGR valve based on the target amount and a position of the first EGR valve. Responsive to a first degradation condition of the first EGR valve, the control unit adjusts the position of the second EGR valve based on the target amount and based on a pressure of the first exhaust manifold, and responsive to a second degradation condition of the first EGR valve, adjusts the position of the second EGR valve based on the target amount.

Abstract: A system includes one or more processors configured to obtain environmental data geographically and temporally corresponding to scheduled travel of a vehicle system. The one or more processors are further configured to determine a power output capability range for the vehicle system traveling during a trip based on the environmental data that is obtained. The one or more processors are also configured to communicate instructions to at least one of a propulsion system of the vehicle system or a vehicle controller of the vehicle system for controlling movement of the vehicle system during the trip such that the vehicle system produces a power output within the power output capability range as the vehicle system travels. The environmental data includes historical values of one or more of temperature, pressure, or air constituency in geographic areas through which the vehicle system will travel during the trip.

Abstract: Various methods and systems are provided for individually adjusting fueling to cylinders of an engine based on an output of a knock sensor coupled to each cylinder. In one embodiment, a method for a multi fuel engine comprises individually adjusting, for each cylinder of the engine, one or more of a gas flow rate of gaseous fuel, a diesel flow rate of diesel fuel, an injection or induction timing of gaseous fuel, or an injection timing of diesel fuel based on each of an output of an individual knock sensor for each cylinder, a knock threshold for current engine operating conditions, and a reference value of individual cylinder output.

Abstract: Various methods and systems are provided for individually adjusting fueling to cylinders of an engine based on an output of a knock sensor coupled to each cylinder. In one embodiment, a method for a multi fuel engine comprises individually adjusting, for each cylinder of the engine, one or more of a gas flow rate of gaseous fuel, a diesel flow rate of diesel fuel, an injection or induction timing of gaseous fuel, or an injection timing of diesel fuel based on each of an output of an individual knock sensor for each cylinder, a knock threshold for current engine operating conditions, and a reference value of individual cylinder output.

Abstract: Systems and methods are provided for controlling exhaust gas recirculation (EGR). In one example, an engine system includes a first EGR valve coupling an exhaust manifold to an engine exhaust system, a second EGR valve coupling the exhaust manifold to an engine intake system, and a control unit. The control unit selectively adjusts a position of the first EGR valve based on a target amount, and adjusts a position of the second EGR valve based on the target amount and a position of the first EGR valve. Responsive to a first degradation condition of the first EGR valve, the control unit adjusts the position of the second EGR valve based on the target amount and based on a pressure of the first exhaust manifold, and responsive to a second degradation condition of the first EGR valve, adjusts the position of the second EGR valve based on the target amount.

Abstract: Various methods and systems are provided for estimating engine fuel consumption. In one example, a method comprises controlling an engine according to a control map, the control map specifying control settings according to a predetermined relationship with respect to engine speed and engine load. The method further comprises estimating fuel consumption of the engine based on each of: an electric-machine based engine load indicated by an electric machine coupled to the engine; and further based on the predetermined relationship.

Abstract: Various methods and systems are provided for operating an exhaust gas recirculation engine having a plurality of exhaust gas donor cylinders and a plurality of non-donor cylinders. One example method includes firing each of the engine cylinders in a cylinder firing order, including firing at least one of the non-donor cylinders between every donor cylinder firing of the engine cycle.

Abstract: Methods and systems are provided for an engine. In one example, the engine system includes an intake conduit, and an airfoil suspended in the intake conduit via an exhaust gas recirculation passage, the exhaust gas recirculation passage fluidically coupled to an interior of the airfoil, the airfoil having a surface including a plurality of apertures fluidically coupling the interior of the airfoil with the intake conduit.