Emission characteristics of a MULDIC combustion diesel engine: effects of EGR

✍ Scribed by Takeshi Hashizume; Takeshi Miyamoto; Hisashi Akagawa; Kinji Tsujimura

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 233 KB
• Volume: 20
• Category: Article
• ISSN: 0389-4304
• DOI: 10.1016/s0389-4304(99)00027-2

✦ Synopsis

The authors earlier proposed a novel type of compression ignition combustion called Premixed lean Diesel Combustion, or `PREDICa. Using early injection timing, a substantial reduction in part-load NO V was realized [1]. However, since high load operation was limited by knocking, the excess air ratio ( ) was limited to more than 2.1 in the homogeneous mixture [2]. Thus, MULtiple stage DIesel Combustion (MULDIC) was proposed, which utilized di!usion combustion by injecting fuel again after completion of premixed lean diesel combustion. This method made it possible to operate at higher loads, while maintaining NO V and smoke emissions under half of conventional combustion [3].

In this research, further reductions in NO V were sought at high-load MULDIC conditions. To this end, emission characteristics were investigated when applying EGR, which is well known for its NO V reduction e!ects.