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US 2017/0370371 A1Published application
Methods and systems for detecting compressor recirculation valve faults
AssigneeFord Global Technologies, LLC
InventorsAdam Nathan Banker, Baitao Xiao, Hamid-Reza Ossareh
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Abstract
Methods are provided for identifying degradation in components of a compressor recirculation valve (CRV). One method may include inferring degradation of the CRV based on adaptation of a compressor surge line outside an expected range.
Claims13
A method for an engine, comprising:
- indicating degradation of a compressor recirculation valve based on a surge line adaptation of a surge line on a compressor map stored in a controller of the engine.
10-17. (canceled)
An engine system, comprising:
- an engine;
- a turbocharger for providing a boosted air charge to the engine, the turbocharger including an exhaust turbine and an intake compressor;
- a continuously variable recirculation valve coupled across the compressor;
- a throttle coupled to the intake, downstream of the compressor;
- a throttle inlet pressure sensor located downstream of the compressor and upstream of the throttle;
- and
- a controller with computer readable instructions for,
- detecting degradation of the continuously variable recirculation valve based on adaptation of a surge line of a compressor map stored in a memory of the controller.
5 more elements
Dependencies are inferred from the claim text.