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Effects of the Intake Valve Timing and the Injection Timing for a Miller Cycle Engine

Han, Sung-Bin (Department of Mechanical & Automotive Engineering, Induk University)
Chang, Yong-Hoon (Department of Mechanical & Automotive Engineering, Induk University)
Choi, Gyeung-Ho (EROOM G & G Co., Ltd)
Chung, Yon-Jong (Department of Automotive Engineering, Daegu Mirae College)
Poompipatpong, Chedthawut (Science in Automotive Engineering, King Mongkut's Institute of Technology North Bangkok)
Koetniyom, Saiprasit (Science in Automotive Engineering, King Mongkut's Institute of Technology North Bangkok)

Publication Information

Journal of Energy Engineering / v.19, no.1, 2010 , pp. 32-38 More about this Journal

Abstract

The objective of the research was to study the effects a Miller cycle. The engine was dedicated to natural gas usage by modifying pistons, fuel system and ignition systems. The engine was installed on a dynamometer and attached with various sensors and controllers. Intake valve timing, engine speed, load, injection timing and ignition timing are main parameters. Miller Cycle without supercharging can increase brake thermal efficiency 1.08% and reduce brake specific fuel consumption 4.58%. The injection timing must be synchronous with valve timing, speed and load to control the performances, emissions and knock margin. Throughout these tested speeds, original camshaft is recommended to obtain high volumetric efficiency.

Keywords

Miller cycle; Natural Gas Engine; Intake valve timing; Injection timing; Ignition timing; Emissions;

Citations & Related Records

Reference

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