The influence of inlet port design on the in-cylinder charge mixing
A detailed investigation of the influence of intake port design on the in-cylinder flow structure during the intake and compression strokes, the mixing of the residual gas and a non-premixed intake charge, and the extent and pattern of charge inhomogenity near the time of combustion is described. The engine geometry is typical of the current lean-burn design and the study includes comparison of a helical (swirl) port and an idealized direct (no swirl) port designs. The results show marked dependence of the in-cylinder charge mixing characteristics on the intake port design. It is found that combinations of intake port design and manifold fuel injection timing produce favourable-stratified or irregularly-mixed charged distributions at the time of spark ignition. The consequences with respect to combustion characteristics are pointed out.
- OSTI ID:
- 5488561
- Report Number(s):
- CONF-890240--
- Country of Publication:
- United States
- Language:
- English
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