COMBUSTION PHASING CONTROL TECHNIQUES USING A PHYSICS-BASED COMBUSTION MODEL
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United States of America Patent
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app pub date -
Aug 10, 2016
filing date -
Aug 10, 2016
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Abstract
A control system includes an ignition system configured to generate spark within a cylinder of an engine and a controller. The controller is configured to obtain a target angle of the crankshaft for an approximately 50% mass fraction burn (MFB50) and predict an ignition angle to achieve the target MFB50 angle, the ignition angle indicating an advance or retardation of spark timing. Using a combustion model, the controller is configured to generate a modeled MFB50 angle based on the predicted ignition angle and, based on the target and modeled MFB50 angles and the predicted ignition angle, determine a relationship between MFB50 angle and ignition angle. The controller is also configured to control the ignition system using the determined relationship.
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