Abstract: A variable drive system of a power system is disclosed. The variable drive system may include an engine gearset to transfer power from an engine output of an engine to a variable input driveshaft of the variable drive system. The variable drive system may include a generator gearset to transfer power, generated by the engine, to a generator driveshaft of a generator. The variable drive system may include a variable drive, coupled to the variable input driveshaft, to enable a gear ratio between engine output and the generator driveshaft to be adjustable, the variable input driveshaft being offset from at least one of the engine output or the generator driveshaft. The variable drive system may include a direct drive clutch to bypass variable power transfer through the variable drive and enable direct power transfer from the engine output to the generator driveshaft.

Abstract: A variable drive system of a power system is disclosed. The variable drive system may include an engine gearset to transfer power from an engine output of an engine to a variable input driveshaft of the variable drive system. The variable drive system may include a generator gearset to transfer power, generated by the engine, to a generator driveshaft of a generator. The variable drive system may include a variable drive, coupled to the variable input driveshaft, to enable a gear ratio between engine output and the generator driveshaft to be adjustable, the variable input driveshaft being offset from at least one of the engine output or the generator driveshaft. The variable drive system may include a direct drive clutch to bypass variable power transfer through the variable drive and enable direct power transfer from the engine output to the generator driveshaft.

Abstract: A variable drive system of a power system is disclosed. The variable drive system may include an engine gearset to transfer power from an engine output of an engine to a variable input driveshaft of the variable drive system. The variable drive system may include a generator gearset to transfer power, generated by the engine, to a generator driveshaft of a generator. The variable drive system may include a variable drive, coupled to the variable input driveshaft, to enable a gear ratio between engine output and the generator driveshaft to be adjustable, the variable input driveshaft being offset from at least one of the engine output or the generator driveshaft. The variable drive system may include a direct drive clutch to bypass variable power transfer through the variable drive and enable direct power transfer from the engine output to the generator driveshaft.

Abstract: A variable drive system of a power system is disclosed. The variable drive system may include an engine gearset to transfer power from an engine output of an engine to a variable input driveshaft of the variable drive system. The variable drive system may include a generator gearset to transfer power, generated by the engine, to a generator driveshaft of a generator. The variable drive system may include a variable drive, coupled to the variable input driveshaft, to enable a gear ratio between engine output and the generator driveshaft to be adjustable, the variable input driveshaft being offset from at least one of the engine output or the generator driveshaft. The variable drive system may include a direct drive clutch to bypass variable power transfer through the variable drive and enable direct power transfer from the engine output to the generator driveshaft.

Abstract: An electric power system includes an engine, a generator, a drivetrain including a driveshaft, and an energy storage system having a flywheel. In an implementation, a parallel-path continuously variable transmission is structured to transfer energy between the flywheel and the driveshaft, and in another implementation a parallel-path continuously variable transmission transfers energy between the engine and the generator. The transmission includes a variator and a differential geartrain. An electric motor is coupled to the flywheel and charges the flywheel such that stored flywheel energy is available for bringing up engine speed from a standby state and/or to accommodate generator load changes with limited generator speed changes.

Abstract: An electric power system includes an engine, a generator, a drivetrain including a driveshaft, and an energy storage system having a flywheel. In an implementation, a parallel-path continuously variable transmission is structured to transfer energy between the flywheel and the driveshaft, and in another implementation a parallel-path continuously variable transmission transfers energy between the engine and the generator. The transmission includes a variator and a differential geartrain. An electric motor is coupled to the flywheel and charges the flywheel such that stored flywheel energy is available for bringing up engine speed from a standby state and/or to accommodate generator load changes with limited generator speed changes.

Abstract: A power system includes an engine, a driveshaft, and an energy storage system having a flywheel. The energy storage system further includes a transmission structured to transfer energy between the flywheel and the driveshaft. The transmission includes a differential geartrain and a variator coupled to the differential geartrain and having a variator input shaft and a variator output shaft rotatable at a range of speed ratios. The variator may be coupled to a sun gear in the differential geartrain and controls a pattern of energy transfer between the flywheel and the driveshaft.

Abstract: A power system includes an engine, a driveshaft, and an energy storage system having a flywheel. The energy storage system further includes a transmission structured to transfer energy between the flywheel and the driveshaft. The transmission includes a differential geartrain and a variator coupled to the differential geartrain and having a variator input shaft and a variator output shaft rotatable at a range of speed ratios. The variator may be coupled to a sun gear in the differential geartrain and controls a pattern of energy transfer between the flywheel and the driveshaft.

Abstract: A method for automatic tuning of a reference model for a fracking rig pump is provided. The method includes determining, at a processor connected to a fracking rig pump, a current choke area associated with the fracking rig pump based upon at least a maximum power and a maximum pressure obtained from the fracking rig pump for a pump speed of the fracking rig pump, obtaining a pump power and a pump pressure for the current choke area based upon at least a reference model for the fracking rig pump stored in a memory device coupled to the processor, determining a pressure difference between the maximum pressure obtained from the fracking rig pump and the pump pressure, determining a power difference between the maximum power obtained from the fracking rig pump and the pump power obtained from the reference model, and providing an updated choke area to the reference model.

Abstract: A method for automatic tuning of a reference model for a fracking rig pump is provided. The method includes determining, at a processor connected to a fracking rig pump, a current choke area associated with the fracking rig pump based upon at least a maximum power and a maximum pressure obtained from the fracking rig pump for a pump speed of the fracking rig pump, obtaining a pump power and a pump pressure for the current choke area based upon at least a reference model for the fracking rig pump stored in a memory device coupled to the processor, determining a pressure difference between the maximum pressure obtained from the fracking rig pump and the pump pressure, determining a power difference between the maximum power obtained from the fracking rig pump and the pump power obtained from the reference model, and providing an updated choke area to the reference model.

Abstract: A powertrain for a machine may include a flywheel and a drivetrain having multiple configurations to permit the flywheel to be mechanically connected both upstream and downstream of a transmission. A bypass clutch may be used to selectively couple the flywheel directly to the engine, while a flywheel clutch may be used to selectively couple the flywheel directly to a lower powertrain. In both upsteam and downstream modes of operation, the transmission is bypassed to increase flywheel energy storage and use, as well as expanding the functionality of the flywheel.

Abstract: A powertrain for a machine may include a flywheel and a drivetrain having multiple configurations to permit the flywheel to be mechanically connected both upstream and downstream of a transmission. A bypass clutch may be used to selectively couple the flywheel directly to the engine, while a flywheel clutch may be used to selectively couple the flywheel directly to a lower powertrain. In both upsteam and downstream modes of operation, the transmission is bypassed to increase flywheel energy storage and use, as well as expanding the functionality of the flywheel.

Abstract: A flywheel assembly for a turbocharger a rotatable flywheel shaft that is separate from a turbocharger shaft, and a flywheel body coupled to the flywheel shaft. A flywheel sensor determines a flywheel operating parameter and supplies a flywheel feedback signal indicative of the flywheel operating parameter, and a flywheel clutch selectively couples the flywheel shaft to the turbocharger shaft. A controller operates the flywheel clutch based on the flywheel feedback signal. The flywheel shaft and flywheel body may be disposed in a flywheel housing that is separate and spaced from a turbocharger housing.

Abstract: A machine has a power train including a prime mover connected to a transmission having two or more selectable gear settings. The machine includes an electronic controller configured to receive and transmit signals indicative of machine parameters. The electronic controller contains computer executable instructions for determining a current value for at least one efficiency metric of the machine at a current gear setting of the transmission. Instructions for determining a first expected value for the efficiency metric at a first alternative gear setting, instructions for comparing the current value with the first expected value to determine an optimal gear setting as between the current gear setting and the first alternative gear setting at least partially based on engine speed, and instructions for indicating a gear shift recommendation and/or performing a gear shift to select the optimal gear setting are executed during operation.

Abstract: A machine has a power train including a prime mover connected to a transmission having two or more selectable gear settings. The machine includes an electronic controller configured to receive and transmit signals indicative of machine parameters. The electronic controller contains computer executable instructions for determining a current value for at least one efficiency metric of the machine at a current gear setting of the transmission. Instructions for determining a first expected value for the efficiency metric at a first alternative gear setting, instructions for comparing the current value with the first expected value to determine an optimal gear setting as between the current gear setting and the first alternative gear setting at least partially based on engine speed, and instructions for indicating a gear shift recommendation and/or performing a gear shift to select the optimal gear setting are executed during operation.

Abstract: A method is provided for compensating for factors affecting particulate matter accumulation within an aftertreatment element of an engine exhaust system. The method comprises determining rate of change of flow resistance through the aftertreatment element with time. Regeneration is periodically initiated to reduce particulate matter accumulation within the aftertreatment element. Rate of change of flow resistance through the aftertreatment element over time is correlated with at least a model of particulate matter accumulation within the aftertreatment element and a model of regeneration frequency of the aftertreatment element, based on predetermined values for particulate matter accumulation and regeneration frequency. Action, at least including increasing regeneration frequency, is initiated to compensate for an increased rate of particulate matter accumulation in the aftertreatment element.

Abstract: A power system including an exhaust producing engine, an exhaust system and an exhaust gas recirculation (EGR) system is provided. The EGR system may include an EGR flowpath and an air intake system. The EGR system may also include an EGR valve configured to regulate the flow of exhaust gases through the EGR flowpath. The power system may also include a monitoring system configured to monitor operating parameters of at least two components of the EGR system. The power system may also include a controller configured to determine, based on the monitored operating parameters, a maximum flowrate value for each of the components. Each of the maximum flowrate values may represent the maximum EGR flowrate for that component. The controller may be configured to control the EGR valve, based on the maximum flowrate values, to result in an EGR flowrate no greater than the lowest of the maximum flowrate values.

Abstract: A method is provided for compensating for variability in ash accumulation rates within an aftertreatment element of an engine exhaust system. The method includes determining flow resistance values through the aftertreatment element and tracking minimum flow resistance values over time. The method also includes correlating the tracked minimum flow resistance values over time, with a model of engine oil consumption rate that is based on predetermined values for model engine oil consumption. The method further includes adjusting the predetermined values based on the tracked minimum flow resistance values over time.

Abstract: An exhaust gas recirculation (EGR) system may include an EGR flowpath configured to route a portion of exhaust gases produced by an engine back to an air intake of the engine. The system may include an EGR valve configured to regulate the flow of exhaust gases through the EGR flowpath. In addition, the system may include a flow detection device configured to determine the flowrate of exhaust gases through the EGR flowpath. The system may further include a controller configured to control the EGR valve. In some embodiments, the controller may be configured to control the EGR valve using open-loop control when the flow detection device determines that the EGR flowrate is below a predetermined flowrate and using closed-loop control when the detection device determines that the EGR flowrate is at or above the predetermined flowrate.

Abstract: A power system including an exhaust producing engine, an exhaust system and an exhaust gas recirculation (EGR) system is provided. The EGR system may include an EGR flowpath and an air intake system. The EGR system may also include an EGR valve configured to regulate the flow of exhaust gases through the EGR flowpath. The power system may also include a monitoring system configured to monitor operating parameters of at least two components of the EGR system. The power system may also include a controller configured to determine, based on the monitored operating parameters, a maximum flowrate value for each of the components. Each of the maximum flowrate values may represent the maximum EGR flowrate for that component. The controller may be configured to control the EGR valve, based on the maximum flowrate values, to result in an EGR flowrate no greater than the lowest of the maximum flowrate values.