ENGINE COMBUSTION ROBUSTNESS CONTROL METHOD BASED ON ENGINE COMBUSTION ESTIMATION AND ENGINE CONTROL SYSTEM FOR ENGINE COMBUSTION ROBUSTNESS

摘要

Disclosed are a system and an engine combustion robustness control method based on engine combustion estimation. The method may include setting an MFB50 goal value for controlling a generation position of an MFB50 at which a heat release rate is about 50% in a cylinder during driving of an engine and a Pmax goal value for controlling a maximum pressure formed in the cylinder, detecting vibration of the engine, selecting raw vibration from the detected vibration of the engine, calculating an MFB50 estimation value and a Pmax estimation value by extracting a specific frequency band from the selected raw vibration, adjusting an injection parameter mapping applied to the engine, allowing the MFB50 estimation value to track the MFB50 goal value using an adjusted injection parameter mapping value, and allowing the Pmax estimation value to track the Pmax goal value.

主权项

1. An engine combustion robustness control method based on engine combustion estimation, comprising:
performing a combustion robustness control setting of setting an MFB50 (Mass Fraction Burned 50%) goal value for controlling a generation position of an MFB50 at which a heat release rate is about 50% in a cylinder during driving of an engine in which combustion is controlled by a controller, and a Pmax goal value for controlling a maximum pressure formed in the cylinder; performing a combustion robustness control preparation of detecting vibration of the engine, selecting raw vibration from the detected vibration of the engine, and calculating an MFB50 estimation value and a Pmax estimation value by extracting a specific frequency band from the selected raw vibration; and performing a combustion robustness control execution of adjusting an injection parameter mapping applied to the engine, allowing the MFB50 estimation value to track the MFB50 goal value using an adjusted injection parameter mapping value, and allowing the Pmax estimation value to track the Pmax goal value.