Abstract: Methods and systems for operating a hybrid driveline that includes an engine and an electric machine are presented. In one non-limiting example, the engine and electric machine are operated according to a solution of a Hamiltonian that includes a first co-state and a second co-state, an engine fuel flow parameter, a rate of change of battery state of charge parameter, and an emissions flow rate parameter.

Abstract: A hybrid vehicle includes powertrain components such as an engine, an automatic transmission, and a traction motor selectively coupled to the engine via a clutch and to the transmission. At least one controller is programmed to control these powertrain components. The vehicle is driven over a drive cycle that includes multiple engine starts and transmission gear shifts. An amount of fuel consumption used during these engine starts and transmissions gear shifts is stored on an on-board storage device. Subsequently, the engine is inhibited from starting and the transmission is inhibited from shifting gears based on the amount of fuel consumption associated with the engine starts and transmission gear shifts performed during the drive cycle as recalled from the storage device.

Abstract: Methods and systems for operating a hybrid driveline that includes an engine and an electric machine are presented. In one non-limiting example, the engine and electric machine are operated according to a solution of a Hamiltonian that includes a first co-state and a second co-state, an engine fuel flow parameter, a rate of change of battery state of charge parameter, and an emissions flow rate parameter.

Abstract: A hybrid vehicle includes powertrain components such as an engine, an automatic transmission, and a traction motor selectively coupled to the engine via a clutch and to the transmission. At least one controller is programmed to control these powertrain components. The vehicle is driven over a drive cycle that includes multiple engine starts and transmission gear shifts. An amount of fuel consumption used during these engine starts and transmissions gear shifts is stored on an on-board storage device. Subsequently, the engine is inhibited from starting and the transmission is inhibited from shifting gears based on the amount of fuel consumption associated with the engine starts and transmission gear shifts performed during the drive cycle as recalled from the storage device.

Abstract: In at least one embodiment, a fuel cell anode exhaust system includes a fuel cell anode having an input and an output. The system also includes a first conduit loop communicating with the anode input and output. The system also includes a second conduit loop having an input and an output. The input and output communicate with the first conduit loop. A gas separator is disposed on the second conduit loop for purifying an exhaust stream fed into the gas separator.

Abstract: In at least one embodiment, a fuel cell anode exhaust system includes a fuel cell anode having an input and an output. The system also includes a first conduit loop communicating with the anode input and output. The system also includes a second conduit loop having an input and an output. The input and output communicate with the first conduit loop. A gas separator is disposed on the second conduit loop for purifying an exhaust stream fed into the gas separator.

Abstract: A method for monitoring torque in an electric motor is provided. First, the motor current is measured and the AC torque is determined based on the measured current. The speed of the motor and the DC motor power are then determined. The DC torque is calculated as a function of the DC motor power and the motor speed. The DC torque is then compared to the AC torque. After the AC torque is verified, it is compared to a reference torque to determine if the difference between the torques is within a torque deviation tolerance.

Abstract: A multi-phase induction motor torque control method comprising the steps of establishing an adaptive speed observer and an adaptive flux observer using a speed sensorless control scheme. Rotor speed is estimated based on filtered current and voltage command signals as inputs. A flux observer based on the estimated rotor speed and rotor flux angle is calculated using the estimated rotor flux. Torque is determined following estimation of speed and flux.

Abstract: A method and strategy for providing real-time estimates of the machine parameters of an induction machine, including rotor resistance, rotor inductance, stator resistance, stator inductance and mutual inductance. The induction machine is a part of a torque delivery driveline. The method comprises expressing stator voltage as a function of machine parameters, stator current, stator excitation frequency and slip frequency. A functional relationship of rotor current, rotor resistance, rotor flux, electrical speed of applied stator voltage and rotor electrical speed is defined. Rotor current and characteristic parameters are calculated, the machine parameters being calculated using the characteristic parameters.

Abstract: A method and strategy for providing real-time estimates of the machine parameters of an induction machine, including rotor resistance, rotor inductance, stator resistance, stator inductance and mutual inductance. The induction machine is a part of a torque delivery driveline. The method comprises expressing stator voltage as a function of machine parameters, stator current, stator excitation frequency and slip frequency. A functional relationship of rotor current, rotor resistance, rotor flux, electrical speed of applied stator voltage and rotor electrical speed is defined. Rotor current and characteristic parameters are calculated, the machine parameters being calculated using the characteristic parameters.

Abstract: A multi-phase induction motor torque control method comprising the steps of establishing an adaptive speed observer and an adaptive flux observer using a speed sensorless control scheme. Rotor speed is estimated based on filtered current and voltage command signals as inputs. A flux observer based on the estimated rotor speed and rotor flux angle is calculated using the estimated rotor flux. Torque is determined following estimation of speed and flux.

Abstract: Within both a method for operating an internal combustion engine and a system for operating the internal combustion engine there is provided an engine rotation speed pulsation damping within the internal combustion engine through use of a PID controller which varies a single PID control parameter, particularly, KD to provide the engine rotation speed pulsation damping within the internal combustion engine. Within both the method and the system there is also provided a pair of control algorithms for use within the PID controller such as to effect the desired engine rotation speed pulsation damping when operating the internal combustion engine.

Abstract: Within both a method for operating an internal combustion engine and a system for operating the internal combustion engine there is provided an engine rotation speed pulsation damping within the internal combustion engine through use of a PID controller which varies a single PID control parameter, particularly, KD to provide the engine rotation speed pulsation damping within the internal combustion engine. Within both the method and the system there is also provided a pair of control algorithms for use within the PID controller such as to effect the desired engine rotation speed pulsation damping when operating the internal combustion engine.

Abstract: A sensorless control system for an induction motor employs direct tracking of torque and flux regulation to achieve improved motor control without the need for transformation to the rotor flux related frame. A novel torqueflux dynamic model used to implement the control method employs stator voltage as an input, and achieves separation of torque and flux regulation. An alternate regulation method better suited for slow reference signals relies on a steady state solution of the dynamic model.