A new technology to overcome the limits of HCCI engine through fuel modification. (5th April 2016)

• Record Type: Journal Article
• Authors: Bahng, GunWoong; Jang, Dongsoon; Kim, Youngtae; Shin, Misoo
• Is Part Of: Applied thermal engineering. Volume 98(2016:Apr.)
• Page Start: 810
• Page End: 815
• Publication Date: 2016-04-05
• Subjects: HCCI engine -- Gasoline vaporization -- Water electrolysis gas -- HHO gas -- Lean burn problem -- Engine efficiency; Heat engineering -- Periodicals; Heating -- Equipment and supplies -- Periodicals; Periodicals; 621.40205
• DOI: 10.1016/j.applthermaleng.2015.12.076
• Languages: English
• ISSNs: 1359-4311

Abstract

Highlights: Problems of HCCI engine can be overcome by adopting fuel modification. Gasoline vapor with HHO gas showed drastic improvement of fuel efficiency. Performance of single cylinder engine shows fuel efficiency more than double. Abstract: The energy efficiency of internal combustion engine reached to about 30% only recently. To increase the efficiency, homogeneous charge compression ignition (HCCI) has been proposed, however, there is no available commercial engine yet. The main problem lies in the delayed heating rate in spite of fast reaction of homogeneous charged state of HCCI with excess air. To overcome this difficulty, a modification of fuel by vaporization of liquid gasoline with water electrolysis gas and air was adopted in order to warrant the fast and high temperature rise. Experiments were carried out with single cylinder engines supplied from the four different manufacturers. Experimental results show that fuel consumption was decreased by more than 50% compared to the case of supplying liquid fuel. It is believed it was due to the combined effects of the high and fast heating potential of water electrolysis gas together with the efficient turbulence mixing effect of vaporized fuel with excess air. By this method, the drawbacks caused by lean burn in the HCCI engine such as small power range can be overcome.