Method of controlling cam phaser to compensate for temperature changes

A method of controlling a cam phaser in a vehicle engine, selectively advance or retard a camshaft relative to a crankshaft, comprises determining an initial demand value (δ0) for said advance or retard, and setting said 10 cam phaser to apply said actual advance or retard (δ1) based on said initial...

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Bibliographische Detailangaben
Hauptverfasser:	Mathieu Da Graca, Caroline Steiner, Marc Mathieu, Julien Monnard
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING COMBUSTION ENGINES CONTROLLING COMBUSTION ENGINES CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES ENGINE PLANTS IN GENERAL HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING STEAM ENGINES WEAPONS
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Beschreibung
Zusammenfassung:	A method of controlling a cam phaser in a vehicle engine, selectively advance or retard a camshaft relative to a crankshaft, comprises determining an initial demand value (δ0) for said advance or retard, and setting said 10 cam phaser to apply said actual advance or retard (δ1) based on said initial demand value and an open loop compensation (correction offset) value (γ) determined dependent on the temperature of the engine. A relationship between engine temperature and compensation value (γ) may be stored in a MAP or table.