Model-Based Control of Combustion Phasing in an HCCI Engine

• Published in: SAE International journal of engines Vol. 5; no. 3; pp. 1163 - 1176
• Main Authors: Bidarvatan, Mehran, Shahbakhti, Mahdi, Jazayeri, Seyed Ali
• Format: Journal Article
• Language: English
• Published: Warrendale SAE International 16-04-2012; SAE International, a Pennsylvania Not-for Profit
• Subjects: Automobile industry; Automotive engines; Combustion; Control systems design; Engines; Feedback control; Fuel combustion; Fuels; Ignition; Mass production; Modeling; Parametric models; Proportional integral; Residual gas; Robust control; State feedback; Tracking control
• ISSN: 1946-3936; 1946-3944; 1946-3944
• DOI: 10.4271/2012-01-1137

Robust control of combustion phasing in Homogenous Charge Compression Ignition (HCCI) engines is a well-recognized challenge limiting the automotive industry for exploiting HCCI benefits in mass production vehicles. Real-time model-based control of combustion phasing is the key to tackle this daunting challenge. In this paper, a new control oriented model is developed for predicting HCCI combustion phasing over a range of engine operation. The model is validated against the experimental data from a single cylinder Ricardo engine. A model-based integral state feedback controller is designed to control HCCI combustion phasing by modulating the ratio of two Primary Reference Fuels (PRFs). The controller's performance is compared with a manually tuned proportional integral controller. The simulation results demonstrate that while both controllers have proper tracking performance, the model-based state feedback controller is more effective in rejecting the external physical disturbances and keeping the engine operation within the desirable range.