Abstract: A vehicle has an internal combustion engine, a motor configured to propel the vehicle, and a supercharger. A mechanical connection is configured to transfer torque from at least one of the engine and machine to the supercharger. The supercharger is a single torque load on the mechanical connection. The vehicle further has a first clutch between the motor and engine and a second clutch between the motor and supercharger.

Abstract: A vehicle includes an engine, an electric machine, and a controller. The electric machine is configured to start the engine. The controller is programmed to pre-flux the electric machine with current that has a magnitude that changes as temperature of the engine changes within a predefined range.

Abstract: Systems and methods for operating an engine that may be frequently stopped and restarted are described. In one example, an engine is rotated in small crankshaft angle increments and stopped after the engine is rotated through a predetermined actual total number of crankshaft degrees so that the engine position does not change when the engine reaches a desired position.

Abstract: A vehicle includes an engine, an electric machine, and a controller. The electric machine is configured to start the engine. The controller is programmed to pre-flux the electric machine with current that has a magnitude that changes as temperature of the engine changes within a predefined range.

Abstract: A vehicle has an internal combustion engine, a motor configured to propel the vehicle, and a supercharger. A mechanical connection is configured to transfer torque from at least one of the engine and machine to the supercharger. The supercharger is a single torque load on the mechanical connection. The vehicle further has a first clutch between the motor and engine and a second clutch between the motor and supercharger.

Abstract: Systems and methods for operating an engine that may be frequently stopped and restarted are described. In one example, an engine is rotated in small crankshaft angle increments and stopped after the engine is rotated through a predetermined actual total number of crankshaft degrees so that the engine position does not change when the engine reaches a desired position.

Abstract: A vehicle includes a combustion engine (CE) and electric machine (EM) coupled to an energy storage system (ESS) and a controller, which are configured to maximize ESS/battery charge recovery during high performance operation. The controller commands the CE to generate power exceeding road load power and power demand (PD), to recharge the ESS at a maximum rate for rapid ESS charge recovery. Responsive to the PD, the CE generates a maximum power to drive the EM to recharge the ESS at a maximum rate during acceleration, deceleration, and when maintaining velocity of the vehicle, and to generate positive torque and discharge the ESS when PD and road load power exceeds CE maximum power, according to the PD, road load power, and maximum ESS charge rate. Power regeneration during deceleration may also be enabled for the electric machine and/or regenerative brakes, which further maximizes ESS SoC recovery during high performance operation.

Abstract: Systems and methods for operating a hybrid powertrain or driveline that includes an engine and an integrated starter/generator are described. In one example, a clutch is positioned between the engine and the integrated starter/generator to reduce the possibility of the integrated starter/generator exceeding a rated speed of the integrated starter/generator.

Abstract: A vehicle includes a combustion engine (CE) and electric machine (EM) coupled to an energy storage system (ESS) and a controller, which are configured to maximize ESS/battery charge recovery during high performance operation. The controller commands the CE to generate power exceeding road load power and power demand (PD), to recharge the ESS at a maximum rate for rapid ESS charge recovery. Responsive to the PD, the CE generates a maximum power to drive the EM to recharge the ESS at a maximum rate during acceleration, deceleration, and when maintaining velocity of the vehicle, and to generate positive torque and discharge the ESS when PD and road load power exceeds CE maximum power, according to the PD, road load power, and maximum ESS charge rate. Power regeneration during deceleration may also be enabled for the electric machine and/or regenerative brakes, which further maximizes ESS SoC recovery during high performance operation.

Abstract: Systems and methods for positioning an engine during engine stopping and during vehicle activation are described. In one example, a belt integrated starter/generator rotates an engine before the engine is started to reduce engine starting time and determine engine position before the engine is started. The engine may be rotated to a first or second position based on a destination of the vehicle.