Improvement on Cylinder-to-Cylinder Variation Using a Cylinder Balancing Control Strategy in Gasoline HCCI Engines 2010-01-0848
Homogenous Charge Compression Ignition (HCCI) combustion offers significant efficiency improvements compared to conventional gasoline engines. However, due to the nature of HCCI combustion, traditional HCCI engines show some degree of sensitivity to in-cylinder thermal conditions; thus higher cylinder-to-cylinder variation was observed especially at low load and high load operating conditions due to different injector characteristics, different amount of reforming as well as non-uniform EGR distribution.
To address these issues, a cylinder balancing control strategy was developed for a multi-cylinder engine. In particular, the cylinder balancing control strategy balances CA50 and AF ratio at high load and low load conditions, respectively. Combustion noise was significantly reduced at high load while combustion stability was improved at low load with the cylinder balancing control.
Citation: Yun, H., Kang, J., Chang, M., and Najt, P., "Improvement on Cylinder-to-Cylinder Variation Using a Cylinder Balancing Control Strategy in Gasoline HCCI Engines," SAE Technical Paper 2010-01-0848, 2010, https://doi.org/10.4271/2010-01-0848. Download Citation
Hanho Yun, Jun-Mo Kang, Man-Feng Chang, Paul Najt
Propulsion Systems Research Labs, GM R&D, General Motors Corp.
SAE 2010 World Congress & Exhibition
Kinetically Controlled CI Combustion and Controls, 2010-SP-2280