Abstract: Some exemplary embodiments include hybrid vehicle systems including an engine operable to output exhaust, an exhaust aftertreatment system configured to receive the exhaust from the engine, the exhaust aftertreatment system including an SCR catalyst operable to reduce NOx in the exhaust and an electrical heater operable to heat the SCR catalyst, a motor/generator operable in a braking mode to receive torque to slow the vehicle and output electrical power, an energy storage device operable to output electrical power to drive the motor/generator and receive electrical power from the motor/generator, and a controller operable to control the electrical heater to heat the SCR catalyst using electrical power from the motor/generator in the braking mode.

Abstract: A system includes an internal combustion engine producing exhaust gases as a byproduct of operation and an aftertreatment system that treats the exhaust gases. The system further includes a controller that is structured to functionally execute operations to enhance the temperature of the aftertreatment system. The controller includes an operating condition monitoring module that interprets a temperature value at a position upstream of a catalyst positioned in the aftertreatment system. The controller further includes an operating condition management module that interprets a threshold temperature value, and an engine management module that provides an engine operation command to continue engine operation in response to the temperature value being at least equal to the threshold temperature value.

Abstract: Some exemplary embodiments include a hybrid vehicle cooling system comprising a closed loop coolant flowpath including a valve operable to direct coolant flow to an internal combustion engine or to an internal combustion engine bypass, a thermostat operable to direct coolant flow from the internal combustion engine or the internal combustion engine bypass to a radiator or a radiator bypass, a plurality of hybrid powertrain components positioned in parallel to receive coolant flow from the radiator or the radiator bypass, a mechanically driven coolant pump operable to pump coolant through the closed loop coolant flowpath, and an electrically driven coolant pump operable to pump coolant through the closed loop coolant flowpath. Additional exemplary embodiments include methods of operation and/or control of hybrid vehicle cooling systems.

Abstract: Some exemplary embodiments include methods of operating a hybrid powertrain system including an engine and a motor/generator. One exemplary method includes sensing a characteristic of the motor/generator, determining a first net torque of the engine based upon a model, determining a second net torque of the engine based upon the characteristic of the motor/generator, and diagnosing the system based upon the first net torque and the second net torque. Further exemplary embodiments include hybrid powertrain methods, hybrid powertrain systems, and articles of manufacture configured to store computer executable instructions for hybrid powertrains. Further embodiments, forms, objects, features, advantages, aspects, and benefits shall become apparent from the following description and drawings.