Performance of Two/Four Stroke Gasoline HCCI Engine with Electromagnetic Valve Train
2007-01-1868
07/23/2007
- Event
- Content
- Comparison of net thermal efficiency and emission in two and four stroke gasoline HCCI engine has been carried out for various valve-timings as negative valve overlap and exhaust valve double opening. The valve timings could easily be converted from a mode to another by configuring schedule of electromagnetic valve-train. Extension of operable torque with high thermal efficiency had been expected in two-stroke HCCI operation, however friction and supercharger loss curtailed about half of the gain in indicated thermal efficiency. In four-stroke operation modes, exhaust valve double opening (‘reinduction’ or ‘rebreathing’) showed the best net thermal efficiency and emission, however the extension of high load limit could not be achieved considerably.
- Pages
- 7
- Citation
- Kim, K., Sakai, H., Kobayashi, T., and Nakano, M., "Performance of Two/Four Stroke Gasoline HCCI Engine with Electromagnetic Valve Train," SAE Technical Paper 2007-01-1868, 2007, https://doi.org/10.4271/2007-01-1868.