International Conference


TitleStephen Sungsan Park, Yongjin Jung and Choongsik Bae, “Diesel Knock Visualization and Frequency Analysis of Premixed Charge Compression Ignition Combustion with a Narrow Injection Angle”, SAE paper 2013-01-0906, presented at SAE 2013 World Congress & Exhibition, Detroit, April, 2013

Stephen Sungsan Park, Yongjin Jung and Choongsik Bae, “Diesel Knock Visualization and Frequency Analysis of Premixed Charge Compression Ignition Combustion with a Narrow Injection Angle”, SAE paper 2013-01-0906, presented at SAE 2013 World Congress & Exhibition, Detroit, April, 2013

Abstract

In this study, premixed charge compression ignition (PCCI) combustion was implemented using an injector that had a narrow injection angle of 70° and a moderately early injection timing of -40° crank angle after top dead center (CA ATDC). In-cylinder pressure measurements and high-speed direct imaging of the flame were performed in an optically accessible single-cylinder diesel engine. Frequency analysis of the acquired in-cylinder pressure data was carried out to obtain the frequency range of diesel knock. Meanwhile, image segmentation and a tracking algorithm based on YCbCr color space were implemented to determine the frequency range of diesel knock from the obtained high-speed image.

The results show that the frequency of diesel knock was dominated by the range from 13 kHz to 15 kHz. Still, frequency with low power existed down until 7 kHz. The frequencies of the area movement were shown to be 13 kHz and, in some cases, 8.67 kHz. It was found that there is a direct relationship between the pressure ringing and the area movement.

PreviousKihyun Kim, Choongsik Bae, “Operating characteristics fo DME-gasoline dual-fuel in a compression ignition engine at the low load condition”, presented at The 17th Asia Pacific Automotive Engineering Conference, Bangkok, April, 2013
NextJoonsik Hwang, Donghui Qi, Yongjin Jung, Choongsik Bae, “Effect of Injection Parameters on the Combustion and Emission Characteristics in a Compression Ignition Engine Fuelled with Waste Cooking Oil Biodiesel” SAE 2013-01-2662, SAE International Fuel & Lubricants Conference, Seoul, October 2013.

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