Combustion and exhaust gas emission characteristics of a diesel engine dual- fueled with natural gas

✍ Scribed by Jin Kusaka; Takashi Okamoto; Yasuhiro Daisho; Ryouji Kihara; Takeshi Saito

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 993 KB
• Volume: 21
• Category: Article
• ISSN: 0389-4304
• DOI: 10.1016/s0389-4304(00)00071-0

✦ Synopsis

This paper deals with a diesel engine dual-fueled with natural gas. This system can achieve a high thermal e$ciency at higher loads by utilizing the premixed lean natural gas mixture ignited by pilot-injected diesel fuel. At low loads, however, high THC emission and low thermal e$ciency were observed. To resolve these problems, e!ects of EGR and intake heating with an exhaust to intake heat exchanger on engine performance and exhaust gas emissions were investigated, especially at low loads. In addition, 3-CFD simulations were conducted to analyze the combustion process in the combustion chamber, using the KIVA-3 code. The result indicates that thermal e$ciency and THC emission at lower loads can be improved by intake air heating combined with EGR.