Abstract: An engine system includes a first turbocharger that includes a first compressor that compresses air and a first turbine coupled to the first compressor and that transfers energy from an exhaust to the first compressor. The engine system further includes a second turbocharger that includes a second compressor disposed downstream of the first compressor. The second compressor receives the air from the first compressor and compresses the air. The second turbocharger further includes a second turbine coupled to the second compressor and disposed upstream of the first turbine. The second turbine transfers energy from the exhaust to the second compressor. The engine system further includes an engine disposed downstream of the second compressor and an exhaust aftertreatment system disposed downstream of the first turbine. The exhaust aftertreatment system receives the exhaust from the first turbine and treats the exhaust. The exhaust aftertreatment system includes a selective catalytic reduction catalyst member.

Abstract: Computer-implemented technology for identifying or determining potentially damaged batteries in an electrical machine system, and for discharging the potentially damaged batteries. Embodiments include determining potentially damaged batteries by monitoring and determining information representative of one or more electrical or mechanical or thermal conditions of the batteries. The conditions may include isolation faults internal to the batteries, isolation faults external to the batteries, liquid or other contamination of the batteries, and other parameters such as out-of-specification temperatures, pressures, voltages and current levels of the batteries. Embodiments include determining whether to discharge potentially damaged batteries based on one or more of the electrical or mechanical or thermal conditions of the damaged batteries.

Abstract: A method and system for bidirectional charging in an electric vehicle include controlling a multi-phase machine in the electric vehicle. In response to determining that a direction of energy flow is from an electric grid to the electric vehicle, the method and system include operating a first set of phases in the multi-phase machine at a grid frequency of the electric grid and connecting the first set of phases in the multi-phase machine to the electric grid. In response to connecting the first set of phases in the multi-phase machine to the electric grid, the method and system include operating a second set of phases in the multi-phase machine, where the second set of phases in the multi-phase machine generates energy via electrical coupling to the first set of phases in the multi-phase machine. The method and system also include providing the energy generated by the second set of phases in the multi-phase machine to charge an energy source of the electric vehicle.

Abstract: A dual-wall integrated flange joint is provided. The integrated flange joint includes an inner wall having at least one inlet and at least one outlet, a flange extending radially outward from the inlet of the inner wall, and a collar extending from the flange in the direction of the inner wall and surrounding at least a portion of the inner wall. The integrated flange joint is formed of a single piece of material. Also, the collar at least partially defines an outer wall, and a volume between the collar and the inner wall at least partially defines an airgap.

Abstract: Systems and apparatuses include one or more processing circuits having one or more memory devices coupled to one or more processors. The one or more memory devices are configured to store instructions thereon that, when executed by the one or more processors, cause the one or more processors to: receive information from at least one sensor; control operation of a vehicle subsystem based on the information; generate a digital twin output based on the information; generate a prioritized list of faults based on the digital twin output; and, provide the prioritized list to a dashboard.

Abstract: A system includes an igniter configured to ignite an air-fuel mixture according to a base spark timing, and a controller coupled with the igniter. The controller is configured to perform operations, including receiving, from one or more sensors, (a) data indicative of an engine load and (b) data indicative of a pressure within an intake manifold coupled with an engine including the engine cylinder. The operations include determining whether the engine load is a low load condition or an idle condition and detecting a presence of a vacuum within the intake manifold. The operations include operating the igniter to delay ignition of the air-fuel mixture within the combustion chamber relative to the base spark timing based on (a) determining that the engine load is the low load condition or the idle condition and (b) detecting the presence of the vacuum within the intake manifold.

Abstract: A method for increasing a temperature of an exhaust gas to a target temperature is provided. The method includes receiving, by a controller, a warm up time for the temperature of the exhaust gas to reach the target temperature; receiving, by the controller, a target emissions based at least on a target energy and an emissions value produced over an elapsed time interval relative to the warm up time; receiving, by the controller, an allowable heater power based at least on the target emissions; and operating, by the controller, a heater downstream from an engine of a vehicle with a heater power command at or below the allowable heater power to heat the exhaust gas to the target temperature.

Abstract: Systems and methods for aftertreatment system thermal management using cylinder deactivation and/or intake-air throttling are disclosed. A controller is configured to: receive a first temperature value regarding a temperature change over time regarding the aftertreatment system and a second temperature value associated with the engine; determine, based on the first temperature value being below a first threshold, that a thermal management mode is a first thermal management mode that is a warm up mode; determine, based on the first temperature value being at or above the first threshold, that the thermal management mode is a second thermal management mode that is a keep warm mode; determine, responsive to the thermal management mode being the first thermal management mode and based on comparing the second temperature value to a second threshold, an operating mode; and initiate at least one of the first operating mode or the second operating mode.

Abstract: A system includes an aftertreatment system coupled to an engine and a controller communicably coupled to the engine and the aftertreatment system. The controller is configured to perform operations including: receiving a temperature value regarding a temperature of an aftertreatment system; comparing the temperature value to a first threshold or a second threshold, the first threshold greater than the second threshold; and implementing one of a plurality of engine braking modes based on comparing the temperature value to the first threshold or the second threshold.

Abstract: The application relates to a cylinder head offset chamfer design. An engine includes a cylinder block and a cylinder head assembly. A plurality of cylinders are defined between the cylinder block and the cylinder head. The cylinder head assembly includes a cylinder head, a plurality of channels defined within the cylinder head, the channels fluidly coupled to the plurality of cylinders via a plurality of cylinder ports. Each of the cylinder ports includes a chamfered portion. The cylinder head assembly further includes a plurality of valves, each of the plurality of valves selectively coupled to a respective cylinder port of the plurality of cylinder ports.

Abstract: A crankshaft assembly for an internal combustion engine includes a crankshaft defining a plurality of first apertures, a damper defining a plurality of second apertures, and a barring interface component configured to be engaged by a barring tool to facilitate rotation of the crankshaft assembly. The barring interface component defines a plurality of third apertures. Each of the plurality of third apertures is configured to align with one of the plurality of first apertures and one of the plurality of second apertures to selectively receive one of a plurality of fasteners to couple the barring interface component and the damper to the crankshaft.

Abstract: An electric auxiliary power distribution system for a hybrid electric vehicle including a battery pack, a power system, a charge determination module, and a controller. The power system is configured to supply power to the battery pack from an engine. The controller is communicably coupled to the power system and the charge determination module. The controller is configured to: receive, from the charge determination module, a charge parameter associated with a hoteling event of the hybrid electric vehicle; determine a threshold state of charge based on the charge parameter; and control the power system to increase a state of charge of the battery pack to satisfy the threshold state of charge.

Abstract: A system includes a controller communicably coupled to an engine. The controller is configured to perform operations comprising receiving a temperature value regarding an aftertreatment system; receiving a regeneration power value regarding a braking event; comparing the temperature value to a temperature threshold. Responsive to the temperature value being above the temperature threshold and the regeneration power value being at or above a first power threshold, the controller is configured to cause one or more electric machines to rotate the engine during the braking event. Responsive to the temperature value being below the temperature threshold and the regeneration power value being at or above a second power threshold, the controller is configured to cause the one or more electric machines to rotate the engine, and activate a heater associated with the aftertreatment system to heat the aftertreatment system during the braking event.

Abstract: Presented herein are systems and methods for performing federated learning across vehicles. A computing device having one or more processors coupled with memory can maintain, on the memory, a first machine learning (ML) comprising a first plurality of parameters for determining values identifying a characteristic of a vehicle function on at least one of a plurality of vehicles. The computing device can receive a second plurality of parameters generated by a second ML used by each respective vehicle. The computing device can update the first plurality of parameters of the first ML in accordance with the second plurality of parameters received from each respective vehicle of the plurality of vehicles. The computing device can transmit, to a vehicle, the updated first plurality of parameters to update the second plurality of parameters of the second ML on the vehicle.

Abstract: A method includes: receiving information indicative of operation of a vehicle and of a driving condition for the vehicle; determining a slowdown event of the vehicle within a predefined time period or distance based on the received information; determining, in response to the determination of the slowdown event within the predefined time period or distance; that a takeover event is feasible based on the received information; and, initiating the takeover event in response to the determination that the takeover event is feasible.

Abstract: An exhaust aftertreatment system and a method thereof is provided. The system includes a heater configured to provide heat to a catalyst. The system further includes a heater control unit (HCU) configured to supply electrical power to the heater, and a power supply control unit (PSCU) configured to supply electrical power to the HCU at a variable voltage. The HCU is configured to determine a setpoint parameter which varies in response to variation in a commanded power output of the HCU to drive the heater. The PSCU is configured to receive the setpoint parameter and to adjust the variable voltage supplied to the HCU in response to the setpoint parameter. The adjustment of the setpoint parameter is effective to optimize an efficiency of the HCU during operation to supply the commanded power output to the heater.

Abstract: A gearbox for a generator includes an input shaft coupled to an input gear, and an output shaft coupled to an output gear. The gearbox further includes a first layshaft coupled to a first pair of splitter gears, where one of the first pair of splitter gears is configured to mesh with the input gear and the other of the first pair of splitter gears is configured to mesh with the output gear. The gearbox also includes a second layshaft coupled to a second pair of splitter gears, where one of the second pair of splitter gears is configured to mesh with the input gear and the other of the second pair of splitter gears is configured to mesh with the output gear.

Abstract: A method of controlling an aftertreatment system includes receiving a first input target and a first threshold associated with a first aftertreatment system component; receiving a second threshold associated with a second aftertreatment system component; responsive to the first threshold being greater than the second threshold, determining a second input target that is at or below the first threshold and at or above the second threshold, the second input target associated with a third aftertreatment system component; receiving a nitrous oxide value; determining a first output target based on at least the first input target, the second input target, and the nitrous oxide value; and controlling the aftertreatment system based on the first output target.

Abstract: A piston includes a skirt portion including a skirt sidewall centered about a piston center axis, and a crown portion positioned on an end of the skirt portion. The crown portion and the skirt portion cooperate to define a piston cavity. The crown portion includes a crown sidewall continuous with the skirt sidewall, a rim continuous with the crown sidewall and extending inward from the crown sidewall, an inner wall extending inward from the crown sidewall, and a bowl including a bowl wall extending from the rim to the inner wall. The crown sidewall, the rim, the inner wall, and the bowl wall cooperate to define a passageway extending around the bowl. The inner wall defines a channel extending at a non-zero angle relative to the piston center axis. The channel is in fluid receiving communication with the passageway and in fluid providing communication with the piston cavity.