Novel Two-Stroke Engine Concept, Feasibility Study
2003-01-3211
10/27/2003
- Event
- Content
- A novel two-stroke engine concept is introduced. The cylinder scavenging takes place during the upward motion of the piston. The gas exchange valves are similar to typical four-stroke valves, but the intake valves are smaller and lighter. The scavenging air pressure is remarkably higher than in present-day engines. The high scavenging air pressure is produced by an external compressor. The two-stroke operation is achieved without the drawbacks of port scavenged engines. Moreover, the combustion circumstances, charge pressure and temperature and internal exhaust gas re-circulation (EGR) can be controlled by using valve timings. There is good potential for a substantial reduction in NOx emissions through the use of adjustable compression pressure and temperature and by using the adjustable amount of exhaust gas re-circulation.
- Pages
- 15
- Citation
- Tiainen, J., Saarinen, A., Grönlund, T., and Larmi, M., "Novel Two-Stroke Engine Concept, Feasibility Study," SAE Technical Paper 2003-01-3211, 2003, https://doi.org/10.4271/2003-01-3211.