HCCI Engine Modeling and Control Using Conservation Principles
Author
Summary, in English
The Homogeneous Charge Compression Ignition (HCCI) principle holds promise to increase efficiency and to reduce emissions from internal combustion engines. As HCCI combustion lacks direct ignition timing control and auto-ignition depends on the operating condition, control of auto-ignition is necessary. Since auto-ignition of a homogeneous mixture is very sensitive to operating conditions, a fast combustion phasing control is necessary for reliable operation. To this purpose, HCCI modeling and model-based control with experimental validation were studied. A six-cylinder heavy-duty HCCI engine was controlled on a cycle-to-cycle basis in real time by applying in-cylinder pressure feedback. A low-complexity physical model was developed, aiming at describing the major thermodynamic and chemical interactions in the course of an engine stroke. The model shows the importance of thermal interaction between the combustion and the cylinder walls. The model was used to synthesize a controller for controlling the combustion phasing by varying the inlet valve closing and the inlet temperature. The sythesized controller behaves well both in steady-state and during step changes of the desired combustion phasing.
Publishing year
2008
Language
English
Publication/Series
SAE Technical Paper 2008-01-0789
Document type
Conference paper
Topic
- Control Engineering
- Other Mechanical Engineering
Keywords
- Multivariable Control
- HCCI Engine
- Physical Modeling
Conference name
SAE World Congress 2008
Conference date
2008-04-14 - 2008-04-17
Conference place
Detroit, MI, United States
Status
Published
Project
- Diesel HCCI in a Multi-Cylinder Engine
Research group
- LCCC