Abstract: A system includes an engine including a valvetrain comprising one or more intake valves and one or more exhaust valves, a variable valve actuation (VVA) system electronically controllable to vary operation of the valvetrain to selectably operate the engine in either a Miller cycle or a non-Miller cycle, and an electronic control system configured to control the VVA system to change operation of the engine from the Miller-cycle to the non-Miller cycle if an engine speed condition is satisfied, a peak cylinder pressure (PCP) condition is satisfied, at least one of an air-fuel ratio (AFR) condition and an oxygen-fuel-control (OFC) condition is satisfied, and a minimum off time condition for the VVA system is satisfied.

Abstract: A vehicle includes a hybrid powertrain and a positive clutch. The hybrid powertrain includes an engine and a motor/generator that are controlled so that the positive clutch can be effectively employed in the hybrid powertrain during vehicle launch, gear shifting, engine starting, and transitioning between propulsion modes.

Abstract: A system includes an internal combustion engine including a valve train comprising one or more intake valves operable in a Miller cycle and one or more exhaust valves. An electric turbo motor is electronically controllable to boost an output from a lower pressure turbocharger to a higher pressure turbocharger. An electronic control system configured to control the electric turbo motor in response to a transient condition to boost intake flow pressure to the internal combustion engine during the transient condition.

Abstract: A system, method, and apparatus for zero or low NOx emissions during a certain operating period are provided. A system can include an aftertreatment system including a catalyst. The system can include a pump coupled to at least an intake of an engine and an exhaust of the engine. The system can include a heater positioned downstream of the engine. The system can further include a controller coupled to at least the aftertreatment system. the pump, and the heater. During a warmup period for the aftertreatment system. the controller is configured to maintain the engine in an off state. initiate the heater to increase a temperature of the aftertreatment system while the engine is in the off state. and control the pump to generate an airflow directed from the intake to the heater to increase the temperature of the aftertreatment system.

Abstract: A system includes an internal combustion engine including a valve train comprising one or more intake valves operable in a Miller cycle and one or more exhaust valves. An electric turbo motor is electronically controllable to boost an output from a lower pressure turbocharger to a higher pressure turbocharger. An electronic control system configured to control the electric turbo motor in response to a transient condition to boost intake flow pressure to the internal combustion engine during the transient condition.

Abstract: Provided is a system having a hybrid powertrain having a piston internal combustion engine, and a motor/generator, and the motor generator being coupleable to a clutch and thereby a gearbox, the engine further being equipped with a valvetrain control system operable to change the engine valve operation between a first mode in which the engine can operate in a conventional internal combustion mode and a second mode in which pumping losses are reduced when the engine is not operating in a conventional internal combustion mode.

Abstract: An apparatus for a combustion cylinder of a reciprocating piston engine includes a combustion cylinder end face component including a first side configured to face the combustion cylinder and extending in a radial direction of the combustion cylinder and a pocket recessed into the first side and including a recessed pocket surface. The combustion cylinder end face component may be one of a piston and a cylinder head. A thermal barrier coating is inlaid in the pocket. The thermal barrier coating includes a ceramic-metallic layer directly coating the recessed pocket surface and a ceramic layer directly coating the ceramic-metallic layer and including an outer surface facing the combustion cylinder.

Abstract: A cylinder head includes novel designs for undercuts, contours of the outer enclosure, coolant jackets, and other cavities within an outer enclosure of the cylinder head. The cylinder head design enables the reduction of weight of the head while maintaining structural integrity of the head, and improves control of temperatures in intake side and exhaust side zones of the heads to improve operational efficiency of the engine. A method is provided for additive manufacturing of the cylinder head including the disclosed designs.

Abstract: Systems, apparatus, and methods are disclosed that include an internal combustion engine having a plurality of cylinders and controlling a device to reduce the pressure in an exhaust gas recirculation loop in response to a pressure condition exceeding a threshold.

Abstract: A cylinder head includes novel designs for undercuts, contours of the outer enclosure, coolant jackets, and other cavities within an outer enclosure of the cylinder head. The cylinder head design enables the reduction of weight of the head while maintaining structural integrity of the head, and improves control of temperatures in intake side and exhaust side zones of the heads to improve operational efficiency of the engine. A method is provided for additive manufacturing of the cylinder head including the disclosed designs.

Abstract: A system includes an engine including a valvetrain comprising one or more intake valves and one or more exhaust valves, a variable valve actuation (VVA) system electronically controllable to vary operation of the valvetrain to selectably operate the engine in either a Miller cycle or a non-Miller cycle, and an electronic control system configured to control the VVA system to change operation of the engine from the Miller-cycle to the non-Miller cycle if an engine speed condition is satisfied, a peak cylinder pressure (PCP) condition is satisfied, at least one of an air-fuel ratio (AFR) condition and an oxygen-fuel-control (OFC) condition is satisfied, and a minimum off time condition for the VVA system is satisfied.

Abstract: An apparatus for a combustion cylinder of a reciprocating piston engine includes a combustion cylinder end face component including a first side configured to face the combustion cylinder and extending in a radial direction of the combustion cylinder and a pocket recessed into the first side and including a recessed pocket surface. The combustion cylinder end face component may be one of a piston and a cylinder head. A thermal barrier coating is inlaid in the pocket. The thermal barrier coating includes a ceramic-metallic layer directly coating the recessed pocket surface and a ceramic layer directly coating the ceramic-metallic layer and including an outer surface facing the combustion cylinder.

Abstract: In a system having a hybrid powertrain having a piston internal combustion engine, and a motor/generator, and the motor generator being coupleable to a clutch and thereby to a gearbox, the engine further being equipped with a valvetrain control system operable to change the engine valve operation between a first mode in which the engine can operate in a conventional internal combustion mode and a second mode in which pumping losses are reduced when the engine is not operating in a conventional internal combustion mode. This allows it to be rotated without generating power, in a hybrid mode, with minimal losses.

Abstract: Systems, apparatus, and methods are disclosed that include an internal combustion engine having a plurality of cylinders operable by a valve actuation mechanism. A cylinder deactivation operation is modified in response to determining a cyclical operation mode of the engine.

Abstract: Systems, apparatus, and methods are disclosed that include an internal combustion engine having a plurality of cylinders and controlling a device to reduce the pressure in an exhaust gas recirculation loop in response to a pressure condition exceeding a threshold.

Abstract: Systems, apparatus, and methods are disclosed that include an internal combustion engine having a plurality of cylinders and controlling the intake manifold pressure during early intake valve opening to reduce or prevent oil consumption.

Abstract: Systems, apparatus, and methods are disclosed that include an internal combustion engine having a plurality of cylinders operable by a valve actuation mechanism. A cylinder deactivation operation is modified in response to determining a cyclical operation mode of the engine.

Abstract: Systems, apparatus, and methods are disclosed that include an internal combustion engine having a plurality of cylinders and controlling the intake manifold pressure during early intake valve opening to reduce or prevent oil consumption.

Abstract: Systems, apparatus, and methods are disclosed that include an internal combustion engine having a plurality of cylinders and controlling a variable geometry turbocharger during early intake valve opening to reduce or prevent oil consumption.

Abstract: Systems, apparatus, and methods are disclosed that include an internal combustion engine having a plurality of cylinders and controlling a variable geometry turbocharger during early intake valve opening to reduce or prevent oil consumption.