Abstract: Various methods and systems are provided for removing fluid from a turbocharger turbine. In one example, a turbocharger comprises a turbine including a casing housing a rotor, a drain passage coupled to the casing, and an air jet coupled to the drain passage, the air jet supplying intake air from a high-pressure compressor outlet to the drain passage.

Abstract: Various methods and systems are provided for detecting turbocharger degradation. In one example, a method comprises detecting an axial position of a turbine rotor based on output from a turbine speed sensor, and if the axial position is greater than a threshold distance from a base position, indicating turbocharger degradation.

Abstract: A testing apparatus for a turbocharger is provided. In one example, the testing apparatus comprises a regulatable air input source configured to fluidically couple to one of an oil inlet or an oil outlet of an oil structure cavity of the turbocharger, an air flow measurement device including a flow restrictor which is configured to be coupled to the regulatable air input source, and media embodying instructions for correlating an amount of measured air flow measured by the air flow measurement device to a degree, rate, and/or amount of leakage past a turbocharger bearing component configured to restrict flow to or from the oil structure cavity.

Abstract: Various methods and systems are provided for a turbocharger. In one example, a method includes determining a first pressure at a first location within a turbocharger and determining a second pressure at a second location within the turbocharger. The method further includes indicating degradation of the turbocharger based on the first pressure and the second pressure.

Abstract: Various methods and systems are provided for lowering exhaust gas temperature. In one embodiment, a method comprises increasing an air-to-fuel ratio of an engine in response to an exhaust gas temperature exceeding a threshold temperature value to lower the exhaust gas temperature to a temperature below the threshold temperature value.

Abstract: Various methods and systems are provided for engine operation with a degraded turbocharger. In one embodiment, a method for an engine comprises reducing mass flow through a first turbocharger while continuing engine operation and adjusting operation of a second turbocharger in response to detected degradation of the first turbocharger.

Abstract: A testing apparatus for a turbocharger is provided. The turbocharger includes a turbine and a compressor, and a non-contact seal positioned between an oil cavity and one of the turbine and the compressor. In one embodiment, the testing apparatus includes a regulatable air input configured to couple to an outlet of the oil cavity, the regulatable air input coupled to an air supply, and a flow restrictor with at least one pressure gauge coupled to the regulatable air input. The kit includes media embodying instructions that specify correlating an amount of flow to a degree, rate, or amount of leakage past the non-contact seal.

Abstract: Various methods and systems are provided for controlling air flow in a two-stage turbocharger. In one example, an engine method comprises adjusting one or more exhaust gas recirculation valves to maintain a first turbocharger within a first air flow range, and adjusting a turbocharger bypass valve to maintain a second turbocharger within a second air flow range.

Abstract: A system is provided for use with, a wheeled vehicle. The system includes a media reservoir capable of holding a tractive material that includes particulates; a nozzle in fluid communication with the media reservoir; and a media valve in fluid communication with the media reservoir and the nozzle. The media valve is controllable between a first state in which the tractive material flows through the media valve and to the nozzle, and a second state in which the tractive material is prevented from flowing to the nozzle. In the first state, the nozzle receives the tractive material from the media reservoir and directs the tractive material to a contact surface such that the tractive material impacts the contact surface that is spaced from a wheel/surface interface. The system can modify the adhesion or the traction capability of the contact surface with regard to a subsequently contacting wheel.

Abstract: A shaft imbalance detector system (50) includes a speed sensor (52) that detects a speed of a wheel and generates a speed signal, and a controller (60) connected to the speed sensor (52). The controller (60) is configured to monitor the speed signal, where a variation in the speed signal indicates an imbalance in a shaft (20).

Abstract: A detector (50) including a sensor (52) configured to detect entry of a portion of a wheel (20) into a portion of a clearance gap (37) and thereby to signify that the wheel (20) has deviated from the intended wheel path.

Abstract: Various methods and systems are provided for a turbocharger. In one example, a method includes determining a first pressure at a first location within a turbocharger and determining a second pressure at a second location within the turbocharger. The method further includes indicating degradation of the turbocharger based on the first pressure and the second pressure.

Abstract: Various methods and systems are provided for a turbocharger. In one example, a method includes receiving a signal indicative of a monitored pressure of a pressurized oil supply of a turbocharger or other turbomachine. The method further includes determining whether a high frequency component of the signal meets one or more designated criteria, and, if the high frequency component of the pressure meets the one or more designated criteria, generating a first control signal.

Abstract: A testing apparatus for a turbocharger is provided. The turbocharger includes a turbine and a compressor, and a non-contact seal positioned between an oil cavity and one of the turbine and the compressor. In one embodiment, the testing apparatus includes a regulatable air input configured to couple to an outlet of the oil cavity, the regulatable air input coupled to an air supply, and a flow restrictor with at least one pressure gauge coupled to the regulatable air input. The kit includes media embodying instructions that specify correlating an amount of flow to a degree, rate, or amount of leakage past the non-contact seal.