A method and system of cleaning a control valve

A method and system of cleaning a turbocharger bypass control valve 30, the control valve being operable to vary position of a bypass valve 26 (known as a wastegate valve) and thereby vary the amount of flow bypass across a turbine [Fig 1 22] and/or compressor 24 of a turbocharger for an engine, whe...

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Bibliographische Detailangaben
Hauptverfasser:	Mike Acton, Brian David Eves, Shane Keilthy, Tom Leroy
Format:	Patent
Sprache:	eng
Schlagworte:	ACTUATING-FLOATS BLASTING COCKS COMBUSTION ENGINES COMBUSTION ENGINES IN GENERAL CONTROLLING COMBUSTION ENGINES DEVICES FOR VENTING OR AERATING ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS INTERNAL-COMBUSTION PISTON ENGINES LIGHTING MECHANICAL ENGINEERING TAPS THERMAL INSULATION IN GENERAL VALVES WEAPONS
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Beschreibung
Zusammenfassung:	A method and system of cleaning a turbocharger bypass control valve 30, the control valve being operable to vary position of a bypass valve 26 (known as a wastegate valve) and thereby vary the amount of flow bypass across a turbine [Fig 1 22] and/or compressor 24 of a turbocharger for an engine, wherein the control valve is in fluidic communication with a vacuum source associated with the engine. The control valve is configured to selectively output the vacuum source pressure to modulate the output pressure of the control valve. The method further comprises determining when the control valve requires cleaning, whether the vacuum source is below a threshold value and increasing the flow through the control valve to clean the control valve. The method may also determine whether the vacuum source pressure is expected to be below the threshold and predicting a vacuum requirement for the vacuum source and may also monitor the performance of the control valve, bypass valve, turbocharger and engine, and determine length of time since previous clean of the control valve. The method may also sense whether contaminants have built up within the control valve. The vacuum source may comprise a vacuum reservoir.