Study of Very High Pressure Fuel-Injection for High-BMEP DI-Diesel Engine
Final rept. 30 Sep 97-28 Feb 99
RUTGERS - THE STATE UNIV PISCATAWAY NJDEPT OF MECHANICAL AND AEROSPACE ENGINEERING
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In order to help design a high-power-density HPD low-heat-rejection LHR high-injection-fuel HIP direct-injection compression-ignition engine DI-CI, two main methods were employed 1 engine performance analysis and 2 in-cylinder imaging. In the performance analysis, a Cummins 903 engine was used. The range of airfuel ratio studied was from 18-1 to over 35-1, the injection pressure investigated was as high as 30,625 psi 210 Mpa under varied intake air temperature over 150 deg C. In the in-cylinder imaging, a separate optical single-cylinder Cummins 903 engine was used. A high-speed four-color IR digital imaging system was greatly improved during this contract period. New spectrometric methods were developed to simultaneously determine the distributions of temperature, water vapor and soot concentrations. In addition, a new data analysis and presentation method has been developed. The performance analysis results are reported in two parts a preliminary report as included in Appendix-I and an additional set of results Appendix-Ill. Some of the in-cylinder imaging results, which are now being captured by the improved 515 after incorporating with new electronic packages designed and fabricated in our laboratory, are included with discussions.
- Reciprocating and Rotating Engines