Diesel Knock Visualization and Frequency Analysis of Premixed Charge Compression Ignition Combustion with a Narrow Injection Angle Korea Advanced Inst. of Science and Tech

Format:

Conference/Event

Author/Creator:

Park, Park, author.

Contributor:

Bae, Choongsik

Jung, Yongjin

Conference Name:

SAE 2013 World Congress & Exhibition (2013-04-16 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2013

Summary:

In this study, premixed charge compression ignition (PCCI)combustion was implemented using an injector that had a narrowinjection angle of 70° and a moderately early injection timing of-40° crank angle after top dead center (CA ATDC). In-cylinderpressure measurements and high-speed direct imaging of the flamewere performed in an optically accessible single-cylinder dieselengine. Frequency analysis of the acquired in-cylinder pressuredata was carried out to obtain the frequency range of diesel knock.Meanwhile, image segmentation and a tracking algorithm based onYCbCr color space were implemented to determine the frequency rangeof diesel knock from the obtained high-speed image.The results show that the frequency of diesel knock wasdominated by the range from 13 kHz to 15 kHz. Still, frequency withlow power existed down until 7 kHz. The frequencies of the areamovement were shown to be 13 kHz and, in some cases, 8.67 kHz. Itwas found that there is a direct relationship between the pressureringing and the area movement

Notes:

Vendor supplied data

Publisher Number:

2013-01-0906

Access Restriction:

Restricted for use by site license