Recent work in the area of Homogenous Charge Compression Ignition (HCCI) engine control has focused on the use of variable valve timing (VVT) as a near term implementation strategy. Control of valve timing has a significant influence on combustion phasing and can be implemented with cam-based VVT systems already available in production vehicles. However, cam-based VVT systems pose a challenge by introducing cylinder coupling via a shared actuator. This paper presents a Model Predictive Control (MPC) framework that explicitly accounts for this inter-cylinder coupling as a constraint on the system. The prediction time step of this MPC controller differs from the execution time step, enabling consideration of shared actuation among otherwise independent systems. Experimental results on a multi-cylinder HCCI engine test bed provide validation of this controller.
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