The effects of fuel properties and engine technology on exhaust emissions in D.I. diesel engines : Hiroki Morihisa, Mitsuo Harada, Mitsuo Tamanouchi, Reiji Kumagai, Shigehisa Yamada, Harufusa Sue (Petroleum Energy Center, Advanced Technology & Research Institute)
- Publisher
- Elsevier Science
- Year
- 1997
- Tongue
- English
- Weight
- 136 KB
- Volume
- 18
- Category
- Article
- ISSN
- 0389-4304
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✦ Synopsis
ing injection nozzle hole diameter decreases PM emission. However, a small nozzle hole increases NOx emission and decreases the effect of fuel on PM emission. Decreasing fuel density is effective in reduction of NOx emission, but the effect is smaller than that of nozzle hole diameter and injection pressure. Furthermore injection timing delay decreases the effect of fuel density on NOx emission. 9637500 Characteristics of the Variable-Orifice Nozzle for Direct Injection Diesel Engines Toshiyuki Hasegawa, Takao Iwasaki, Takashi Kobayashi (ZEXEL R & D Center), Yoichiro Matsumoto (University of Tokyo)
The variable-orifice nozzle (V.O.N.) for improving atomization of diesel fuel has been developed to study its injection and spray characteristics. The nozzle orifice area is controlled continuously by using a rotary valve which is one of the components of the V.O.N. Performance of the V.O.N. was evaluated from the instrumentation results such as rate of injection and injection pressure, and instantaneous photography taken by a CCD high speed shutter camera. Injection characteristics and spray pattern responded to the nozzle orifice area which is changed by the rotary valve from larger to smaller.