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1.	Strandh, Petter, et al. (author) Variable Valve Actuation for Timing Control of a Homogeneous Charge Compression Ignition Engine 2005 In: SAE Technical Papers 2005-01-0147. - 400 Commonwealth Drive, Warrendale, PA, United States : SAE International. - 0148-7191. Conference paper (peer-reviewed)abstract Autoignition of a homogeneous mixture is very sensitiveto operating conditions. Therefore fast combustion phasingcontrol is necessary for reliable operation. There areseveral means to control the combustion phasing of a Homogeneous Charge Compression Ignition (HCCI) engine.This paper presents cycle-to-cycle cylinder individual controlresults from a six-cylinder HCCI engine using a VariableValve Actuation (VVA) system. As feedback signal,the crank angle for 50% burned, based on cylinder pressure,is used. Three control structures are evaluated,Model Predictive Control (MPC), Linear Quadratic Gaussiancontrol (LQG) and PID control. In the control designof the MPC and LQG controller, dynamic models obtainedby system identication were used. Successful experimentswere performed on a port-injected six-cylinderheavy-duty Diesel engine operating in HCCI mode.

Strandh, Petter, et al. (author)
Variable Valve Actuation for Timing Control of a Homogeneous Charge Compression Ignition Engine
2005
In: SAE Technical Papers 2005-01-0147. - 400 Commonwealth Drive, Warrendale, PA, United States : SAE International. - 0148-7191.
Conference paper (peer-reviewed)abstract
- Autoignition of a homogeneous mixture is very sensitiveto operating conditions. Therefore fast combustion phasingcontrol is necessary for reliable operation. There areseveral means to control the combustion phasing of a Homogeneous Charge Compression Ignition (HCCI) engine.This paper presents cycle-to-cycle cylinder individual controlresults from a six-cylinder HCCI engine using a VariableValve Actuation (VVA) system. As feedback signal,the crank angle for 50% burned, based on cylinder pressure,is used. Three control structures are evaluated,Model Predictive Control (MPC), Linear Quadratic Gaussiancontrol (LQG) and PID control. In the control designof the MPC and LQG controller, dynamic models obtainedby system identication were used. Successful experimentswere performed on a port-injected six-cylinderheavy-duty Diesel engine operating in HCCI mode.

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