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TitleKitae Yeom and Choongsik Bae, "Di-methyl Ether Homogeneous Charge Compression Ignition Engine with Gasoline Port Injection," 8th 2006 Korea-China International Conference on Internal Combustion Engine and Automotive Engineering, Incheon, Oct. 2006.

Kitae Yeom and Choongsik Bae, “Di-methyl Ether Homogeneous Charge Compression Ignition Engine with Gasoline Port Injection,” 8th 2006 Korea-China International Conference on Internal Combustion Engine and Automotive Engineering, Incheon, Oct. 2006.

Abstract

The combustion and emission characteristics in an engine were investigated under homogeneous charge compression ignition (HCCI) operation with regard to variable valve timing (VVT) and di-methyl ether (DME) direct injection. Two operation modes were tested to analyze the effects of gasoline adding. One is the DME direct injection HCCI mode and the other is Gasoline port injection with DME direct injection HCCI mode. Gasoline was injected at the intake port, while DME was also injected directly into the cylinder. Different intake valve timings, fuel injection timings and fuel injection quantities were tested for combustion phase control and exhaust emission reduction. The indicated mean effective pressure (IMEP) was increased by adding of gasoline. Moreover, the CO emission was reduced. However, the HC and CO2 emission was increased. The HC and CO emissions, which are the index of incomplete combustion, were decreased as the IVO timing was advanced and the injection timing was retarded. Moreover, the IMEP was increased as the IVO timing was advanced and the injection timing was retarded. The NOx emission was lower than 500 ppm at every experimental condition.

PreviousKitae Yeom, Hyeon Sook Yoon and Choongsik Bae, “Combustion Phasing in DME-fuelled HCCI Engine,” pp293-304, Proc. 3rd Asian DME Conference, Incheon, Oct. 2006.
NextHyeonsook Yoon and Choongsik Bae, “Dimethyl-ether (DME) injection strategy for compression-ignition engine,” The 4th International Conference on Flow Dynamics, Sendai, Japan, Sep. 2007.
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