Abstract: Systems and methods for controlling and diagnosing air flow through a compressor without recirculating air flow through the compressor are presented. In one example, a position of an air flow control device located within a compressor housing is adjusted responsive to a request to diagnose flow through the compressor. The diagnostic may be performed while maintaining engine torque and speed.

Abstract: Methods and systems are provided for controlling boost pressure and exhaust gas recirculation in a split exhaust system. In one example, a first portion of exhaust may be routed from a cylinder to an exhaust turbine via a first exhaust valve and a second, remaining portion of exhaust may be routed as exhaust gas recirculation (EGR) via a second exhaust valve, the timing and lift of each of the first valve profile and the second valve profile adjusted based on boost error and EGR error. Further, motor torque from an electric motor may be supplied to the turbocharger to attain a desired boost pressure and a desired EGR flow.

Abstract: Methods and systems are provided for a slidable sleeve valve actuation system for a turbocharger compressor. In one example, an actuator assembly for a slidable sleeve of a turbocharger compressor may comprise: a fork arm coupled to the slidable sleeve; a rotatable lever arm coupled to the fork arm via a rigid connecting shaft; a connector rod coupled between the lever arm and a rotatable element; and an actuator unit coupled to the rotatable element and attached to an attachment case, the attachment case coupled to the turbocharger compressor. The actuator assembly may be actuated to move the slidable sleeve from one position along a casing treatment to another position along the casing treatment, thereby adjusting the alignment of sleeve slots on the slidable sleeve relative to choke or surge slots on the casing treatment.

Abstract: Methods and systems are provided for adjusting an active casing treatment of a compressor responsive to a predicted engine condition. In one arrangement, a controller may actuate a sleeve of a variable geometry compressor casing to a position selected based on each of a compressor pressure ratio and a mass flow through the compressor, as well as driver behavior and predicted road conditions; and adjust each of an EGR actuator and a boost actuator based on the selected position to maintain the compressor pressure ratio during the actuating.

Abstract: Methods and systems are provided for controlling a turbocharged engine. In one arrangement, a method may include concurrently adjusting an exhaust recirculation gas flow and a turbine flow while adjusting geometry of a compressor to compensate for disturbance caused by the compressor adjustment.

Abstract: Methods and systems are provided for controlling boost pressure and exhaust gas recirculation in a split exhaust system. In one example, a first portion of exhaust may be routed from a cylinder to an exhaust turbine via a first exhaust valve and a second, remaining portion of exhaust may be routed as exhaust gas recirculation (EGR) via a second exhaust valve, the timing and lift of each of the first valve profile and the second valve profile adjusted based on boost error and EGR error. Further, motor torque from an electric motor may be supplied to the turbocharger to attain a desired boost pressure and a desired EGR flow.

Abstract: Methods and systems are provided for adjusting an active casing treatment of a compressor responsive to a predicted engine condition. In one example, a controller may actuate a sleeve of a variable geometry compressor casing to a position selected based on each of a compressor pressure ratio and a mass flow through the compressor, as well as driver behavior and predicted road conditions; and adjust each of an EGR actuator and a boost actuator based on the selected position to maintain the compressor pressure ratio during the actuating.

Abstract: Methods and systems are provided for controlling a turbocharged engine. In one example, a method may include concurrently adjusting an exhaust recirculation gas flow and a turbine flow while adjusting geometry of a compressor to compensate for disturbance caused by the compressor adjustment.

Abstract: Systems and methods for controlling and diagnosing air flow through a compressor without recirculating air flow through the compressor are presented. In one example, a position of an air flow control device located within a compressor housing is adjusted responsive to a request to diagnose flow through the compressor. The diagnostic may be performed while maintaining engine torque and speed.

Abstract: Methods and systems are provided for controlling boost pressure and exhaust gas recirculation in a split exhaust system. In one example, a first portion of exhaust may be routed from a cylinder to an exhaust turbine via a first exhaust valve and a second, remaining portion of exhaust may be routed as exhaust gas recirculation (EGR) via a second exhaust valve, the timing and lift of each of the first valve profile and the second valve profile adjusted based on boost error and EGR error. Further, motor torque from an electric motor may be supplied to the turbocharger to attain a desired boost pressure and a desired EGR flow.

Abstract: Methods and systems are provided for a slidable sleeve valve actuation system for a turbocharger compressor. In one example, an actuator assembly for a slidable sleeve of a turbocharger compressor may comprise: a fork arm coupled to the slidable sleeve; a rotatable lever arm coupled to the fork arm via a rigid connecting shaft; a connector rod coupled between the lever arm and a rotatable element; and an actuator unit coupled to the rotatable element and attached to an attachment case, the attachment case coupled to the turbocharger compressor. The actuator assembly may be actuated to move the slidable sleeve from one position along a casing treatment to another position along the casing treatment, thereby adjusting the alignment of sleeve slots on the slidable sleeve relative to choke or surge slots on the casing treatment.

Abstract: Example automatic test equipment (ATE) may include: a device interface board (DIB) on which the DUT is mounted; a system for sending signals to, and receiving signals from, the DUT; and an energy source unit (ESU) to provide current to the DUT via the DIB, where the ESU includes current paths to provide the current, and where the current paths are configured to limit a combined inductance of the current paths.

Abstract: Systems are provided for a reinforcement element coupled to a sheet metal turbine housing that imparts desirable thermal-protective and structurally strengthening characteristics to the housing layers. In one example, a system may include a turbine comprising a housing surrounding a turbine rotor, the housing having an outer layer surrounding an inner layer at a distance to form an intermediate space between the inner and outer layers. Moreover, disposed in the intermediate space is a reinforcement element coupled to the inner and outer layers, providing strength and consistent rigidity without a significant increase in weight to the housing.

Abstract: Systems are provided for a reinforcement element coupled to a sheet metal turbine housing that imparts desirable thermal-protective and structurally strengthening characteristics to the housing layers. In one example, a system may include a turbine comprising a housing surrounding a turbine rotor, the housing having an outer layer surrounding an inner layer at a distance to form an intermediate space between the inner and outer layers. Moreover, disposed in the intermediate space is a reinforcement element coupled to the inner and outer layers, providing strength and consistent rigidity without a significant increase in weight to the housing.

Abstract: Example automatic test equipment (ATE) may include: a device interface board (DIB) on which the DUT is mounted; a system for sending signals to, and receiving signals from, the DUT; and an energy source unit (ESU) to provide current to the DUT via the DIB, where the ESU includes current paths to provide the current, and where the current paths are configured to limit a combined inductance of the current paths.

Abstract: An engine is described having an engine control unit and two or more hydraulically operated wheels, wherein a fluid is flowed from an accumulator to the engine via the first wheel to assist in acceleration of the turbocharger in response to an acceleration signal from the engine control system and wherein the fluid is flowed from the engine to the accumulator via the second wheel to decelerate the turbocharger in response to a deceleration signal from the engine control unit. In one particular embodiment, the second wheel absorbs energy from the turbocharger in response to the deceleration signal from the engine control unit to decelerate the turbocharger. In some embodiments, the hydraulically operated wheels may be positioned on the same shaft of, and between, the turbine and compressor of the turbocharger.

Abstract: A turbocharged internal combustion engine having an engine control unit and apparatus coupled to the turbocharger, to assist in acceleration of the turbocharger in response to an acceleration signal from the engine control system and to decelerate the turbocharger in response a deceleration signal from the engine control unit. The apparatus absorbs energy from the turbocharger in response to the deceleration signal from the engine control unit to decelerate the turbocharger. The apparatus includes one or more hydraulic wheels on the same shaft of, and between, the turbine and compressor of the turbocharger, the one or more hydraulic wheels being driven in response to the acceleration signal to assist in acceleration of the turbocharger or absorb energy from the turbocharger shaft in response the deceleration signal.