Abstract: A method for predicting at least one property of a geological formation may include generating mapping function values relating a plurality of reference elemental compositions to corresponding reference properties thereof based upon at least one non-linear mapping function. The method may further include determining a sample elemental composition of at least one sample associated with the geological formation and performing, using a processor, an interpolation to map the sample elemental composition to at least one sample property based upon the mapping function values and the at least one non-linear function.

Abstract: A method includes determining a machine shaft torque demand and a machine shaft speed, in response to the machine shaft torque demand and the machine shaft speed, determining a machine power demand, determining a power division description between an internal combustion engine, a first electrical torque provider, and a second electrical torque provider, determining a hybrid power train configuration as one of series and parallel, determining a baseline power division description in response to a vehicle speed and the machine power demand, determining a state-of-charge (SOC) deviation for an electrical energy storage device electrically coupled to the first electrical torque provider and the second electrical torque provider, and adjusting the baseline power division description in response to the SOC deviation and the hybrid power train configuration.

Abstract: A method includes defining an application operating cycle and a number of behavior matrices for a hybrid power train that powers the application, each behavior matrix corresponding to operations of the hybrid power train operating in a parallel configuration. The method includes determining a number of behavior sequences corresponding to the behavior matrices and applied sequentially to the application operating cycle, confirming a feasibility of each of the behavior sequences, determining a fitness value corresponding to each of the feasible behavior sequences, in response to the fitness value determining whether a convergence value indicates that a successful convergence has occurred, and in response to determining that a successful convergence has occurred, determining a calibration matrix in response to the behavior matrices and fitness values. The method includes providing the calibration matrix to a hybrid power train controller.

Abstract: The Larmor frequency for an in situ nuclear magnetic resonance (NMR) tool is determined and used to acquire NMR data. An NMR tool is provided and placed in situ, for example, in a wellbore. An initial estimate of the Larmor frequency for the in situ NMR tool is made and NMR data are acquired using the in situ NMR tool. A spectral analysis is performed on the NMR data, or optionally, the NMR data are digitized and a discrete Fourier transform (DFT) is performed on the digitized NMR data. The modal frequency of the spectral analysis or DFT is determined, and the Larmor frequency for the in situ NMR tool is determined using the modal frequency. The NMR tool is modified to transmit at the determined Larmor frequency and then used to acquire further NMR data.

Abstract: A system includes an engine and a first coolant thermally coupled to the engine and circulated by a first pump; a hybrid battery pack thermally coupled to a second coolant circulated by a second pump; and an electric component thermally coupled to the second coolant. The system includes a first heat exchanger that transfers thermal energy between the first coolant and the second coolant. The system includes a second heat exchanger that transfers thermal energy between the second coolant and the auxiliary fluid stream having a temperature below a target operating temperature for the hybrid battery pack. The system includes a first bypass for the first or second coolant at the first heat exchanger, a second bypass for the second coolant or the auxiliary fluid stream at the second heat exchanger, and a component bypass for the second coolant at the hybrid battery pack or the electric component.

Abstract: Methods are disclosed for reducing the variability of particulate emissions in an exhaust stream from an internal combustion engine using a lambda error and/or a NOx error to control an exhaust gas recirculation fraction and/or a mass charge flow control. The methods include operating a controller to adjust the engine gas recirculation fraction and/or the mass charge flow control.

Abstract: The Larmor frequency for an in situ nuclear magnetic resonance (NMR) tool is determined and used to acquire NMR data. An NMR tool is provided and placed in situ, for example, in a wellbore. An initial estimate of the Larmor frequency for the in situ NMR tool is made and NMR data are acquired using the in situ NMR tool. A spectral analysis is performed on the NMR data, or optionally, the NMR data are digitized and a discrete Fourier transform (DFT) is performed on the digitized NMR data. The modal frequency of the spectral analysis or DFT is determined, and the Larmor frequency for the in situ NMR tool is determined using the modal frequency. The NMR tool is modified to transmit at the determined Larmor frequency and then used to acquire further NMR data.

Abstract: A method, apparatus, and system are disclosed for hybrid power system braking. In one embodiment, a deceleration input is received. In response to receiving the deceleration input, a target negative torque trajectory is determined. To achieve the target negative torque trajectory, a regenerative braking device and an electrical energy dissipation device are activated.

Abstract: An apparatus includes an operating conditions module that interprets a number of compressor operating parameters; a compressor flow module that determines a compressor inlet flow in response to the number of compressor operating parameters; and a fresh air flow module that provides a fresh air flow value in response to the compressor inlet flow. The operating conditions module further interprets a current mass air flow value, and the apparatus further includes a mass air flow sensor trimming module that adjusts a mass air flow sensor drift value in response to the current mass air flow value and the fresh air flow value. The apparatus includes a diagnostics module that determines a mass air flow sensor is failed in response to the current mass air flow value and the fresh air flow value.

Abstract: A method includes manufacturing a first assembly having an application requirements module that interprets a contemporaneous performance specification, and an energy partitioning module that provides an electric motor torque target, a battery power flux target, and an internal combustion engine torque target. The method further includes manufacturing a second assembly having an engine control module that controls an internal combustion engine in response to the internal combustion engine torque target. The method includes integrating the first assembly and the second assembly with a third assembly to form a completed hybrid power train, where the third assembly includes a datalink that receives the internal combustion engine torque target from the first assembly and provides the internal combustion engine torque target to the second assembly.

Abstract: Disclosed is a model-independent method for accurate prediction of formation and borehole properties from neutron capture cross section measurements. A mapping function is constructed which maps the input measurements to the properties of interest. The mapping function is a linear combination of Gauss radial basis functions. The expansion coefficients and widths of the Gaussian functions are determined uniquely using a database populated with representative samples. For a sample not included in the original database, the desired properties can be estimated from the mapping function using the measurements made on the unknown sample.

Abstract: A method for controlling aftertreatment regeneration for a system having a hybrid powertrain is described. The method includes determining that an engine aftertreatment regeneration is indicated when a regeneration request index exceeds a first threshold. The method includes determining an acceptable battery usage amount based on a current battery state of charge (SOC) and a minimum battery SOC. The method further includes determining a battery usage amount for an engine aftertreatment regeneration operation. The method includes initiating an engine aftertreatment regeneration when the battery usage amount is less than or equal to the acceptable battery usage amount.

Abstract: A method includes providing an internal combustion engine having an output shaft and producing an exhaust gas stream, providing an electric motor operatively coupled to the output shaft, and determining a regeneration state of an aftertreatment component that treats the exhaust gas stream. The method further includes determining an engine torque requirement such that, when the internal combustion engine achieves the engine torque requirement at a present set of operating conditions, a temperature of the exhaust gas stream will achieve an exhaust gas temperature threshold. The method further includes commanding the electric motor to apply a counter torque to the output shaft in response to the regeneration state indicating an active thermal regeneration event, where the counter torque comprises is high enough for the internal combustion engine to achieve the engine torque requirement. The exhaust gas temperature threshold may be a hold-warm temperature and/or a regeneration temperature.

Abstract: A method for controlling aftertreatment regeneration for a system having a hybrid powertrain is described. The method includes determining that an engine aftertreatment regeneration is indicated when a regeneration request index exceeds a first threshold. The method includes determining an acceptable battery usage amount based on a current battery state of charge (SOC) and a minimum battery SOC. The method further includes determining a battery usage amount for an engine aftertreatment regeneration operation. The method includes initiating an engine aftertreatment regeneration when the battery usage amount is less than or equal to the acceptable battery usage amount.

Abstract: A system includes a hybrid power train having a combustion torque device, an electrical torque device, a driveline mechanically coupled to the torque devices, a battery that exchanges energy with the driveline, and a torque input device that provides a torque request. The hybrid power train is at least partially parallel. The system includes a controller having modules to execute operations for rate control of the hybrid power train. A battery protection module determines a battery protection charge rate limit, a power train protection module determines a power train protection torque change limit, and a torque request module determines the torque request. A rate control module provides a torque balance parameter in response to the limits and the torque request. A torque control module provides an electrical torque and a combustion torque to the driveline in response to the torque balance parameter.

Abstract: A fluid property of live crude oil removed from an earth formation is determined using nuclear magnetic resonance (NMR) measurements. A pressure cell, located on or near the earth's surface, and in which the live crude oil is disposed, is provided. An NMR tool capable of making NMR measurements on the live crude oil is provided, as is a database linking existing NMR data and the fluid property. A mapping function is created from a combination of radial basis functions and parameters of the mapping function are derived using the database. NMR data are acquired on the live crude oil using the NMR tool, and the fluid property is estimated from the acquired NMR data using the mapping function.

Abstract: An apparatus for controlling engine operations to a low NOx output amount at low selective catalytic reduction (SCR) temperature values and alternatively for controlling engine operations in an EGR cooler bypass regime at low engine load levels is described. The apparatus includes a controller that interprets a present speed and a present load of an engine, that determines an engine operating region in response to the present speed and the present load, and that provides an EGR cooler bypass command that provides EGR cooler bypass flow in response to the engine operating region being a first, low load, region. The controller operates the engine with supplemental NOx management in response to the engine operating region being a second, intermediate load, region. The controller operates the engine without either of the EGR cooler bypass or the supplemental NOx management in response to the engine operating region being a third region.

Abstract: A method includes interpreting a powertrain load variation amplitude and an internal combustion engine output profile. The method further includes determining an engine output differential in response to the powertrain load variation amplitude and the internal combustion engine output profile. The method further includes providing an energy accumulator sizing parameter and/or an alternate motive power provider sizing parameter in response to the engine output differential.

Abstract: A system includes a hybrid drive system having an internal combustion engine and a non-combustion motive power source. The system includes an energy storage system and a controller. The controller is structured to functionally execute operations to improve an efficiency of they hybrid drive system. The controller interprets duty cycle data, a boundary condition, and an optimization criterion. The controller further elects a load response operating condition in response to the duty cycle data, the boundary condition, and the optimization criterion. The controller adjusts the operation of the engine and/or the motive power source in response to the elected load response operating condition.

Abstract: An accessory drive motor configuration is disclosed. One embodiment of the accessory drive motor configuration is an apparatus including an internal combustion engine having a crankshaft, wherein the crankshaft is structured to provide traction power. The apparatus further includes an accessory drive system operably coupled to a shaft. The shaft is selectively coupled to an electro-mechanical device and selectively coupled to the internal combustion engine. The shaft extends through at least a portion of the electro-mechanical device.