http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
디젤 엔진용 Metal DPF의 재생평형온도(BPT) 특성에 관한 연구
김충희(Chunghui Kim),김현철(Hyunchul Kim),이기수(Geesoo Lee),최정황(Jeonghwang Choi),전문수(Munsoo Chon) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
In this study, a sample of the metal diesel particulate filter (MDPF) was fabricated, which was mounted on a 2.9 L mid-sized diesel engine to evaluate and analyze BPT and thus consider its application to actual diesel engine vehicles. The exhaust gas temperature on the front end of MDPF was changed at one hour interval from 20 ℃ to 30 ℃, and the resulting differential pressure and back pressure characteristics of the filter were analyzed. The international sample and D and K type samples were used for the evaluation, which were classified according to the filter structure. The BPT of the filter were 362 ℃ for the international sample, 350 ℃ for the D type sample, and 336 ℃ for the K type sample. Considering the actual vehicle temperature frequency for each section in prior studies, the results satisfied the regeneration condition in all sections other than the crowded downtown sections.
김충희 ( Chunghui Kim ),한상욱 ( Sangwook Han ),김현철 ( Hyunchul Kim ),박영균 ( Youngkyun Park ),김영진 ( Youngjin Kim ) 한국액체미립화학회 2018 한국액체미립화학회 학술강연회 논문집 Vol.2018 No.-
As the number of revolutions of the sprocket increased, the overall noise of the system and the chain noise increased linearly. The maximum noise was overall noise 87.4dB(A) and chain noise 65dB(A) at 7,000rpm. Further research is needed on the resonance caused by the tension applied to the chain and the system structure in the future and the change of the noise characteristics accordingly.
스크린 필터 구조 Partial Metal DPF의 PM 저감 특성
김충희(Chunghui Kim),김현철(Hyunchul Kim),이기수(Geesoo Lee),최정황(Jeonghwang Choi),전문수(Munsoo Chon),신석신(Suk Shin Shin),서현규(Hyun Kyu Suh) 한국자동차공학회 2013 한국 자동차공학회논문집 Vol.21 No.3
In this work, the 1L grade integrated metal DOC/DPF filter that can install in engine manifold position was developed to investigate the effect of platinum-coating amount of filter on the improvement of filter activation temperature and reduction of particulate matter (PM). This filter was installed in 2.9L CI engine which meets the EURO-4 emission regulation. Tests for PM reduction efficiency of filter were conducted under ND-13 mode with full-load test condition. It was revealed that the time to reach the activation temperature of metal filter (280℃) was shorter as the amount of platinum-coating increased. This short activation time can be helpful for the reduction of CO and HC emissions during cold start condition. At the same time, PM reduced as the coating amount increased. The reduction percentage of DOC<SUB>40</SUB>, DOC<SUB>20</SUB>, and DOC? were 96.7% (2.34 ㎎/㎾’h), 95.1% (3.47 ㎎/㎾’h), and 94.5% (3.69 ㎎/㎾’h) compared to previous result (71.4 ㎎/㎾’h), respectively.
냉각 갤러리 형상이 디젤엔진 피스톤 온도에 미치는 영향
김충희(Chunghui Kim),신윤섭(Yunsub Sin),이기수(Geesoo Lee),김현철(Hyunchul Kim),유연설(Younsul Yoo),김희수(Heesu Kim) 한국자동차공학회 2013 한국자동차공학회 부문종합 학술대회 Vol.2013 No.5
The weakest point in the piston of the engine is a piston bowl edge where mechanical and thermal loads are directly transferred. One of the promising technologies to complement this issue is remelting piston crown, which increases the durability and strength of the piston. In this study, experimental study was carried out with three types of pistons (base piston, re-melting piston, and down gallery piston). Piston surface temperature was measured for the purpose of . Numerical analysis using FEM was then conducted to evaluate the experimental results. It was revealed that re-melting piston can apply to the conventional diesel engine since the piston temperature from a re-melting piston applied engine was almost the same with that from base piston engine without sacrifice of power and torque.
디젤 엔진용 Metal DPF의 PM 저감 성능 평가에 관한 연구
김충희(Chunghui Kim),김현철(Hyunchul Kim),이헌균(Heonkyun Lee),최정황(Jeonghwang Choi) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
In this study, the prototype was made with the use of a filter to allow the exhaust gases in small and medium-sized diesel vehicles in the engine closest to the metal line to have low temperatures. To construct the sample, the products of the leading companies in the overseas markets were consulted, and then the best filter's position was selected based on the recycled temperature condition that had been analyzed as the operating characteristic, and by separating the temperature of the exhaust gases in the actual vehicle. Valuation with a car chassis dynamometer was performed in the NEDC (new European driving cycle) mode. The samples consisted of four cars, two benchmarked from overseas, one in the NEDC mode, and another that was not mounted on DPF. The result was that the two cars benchmarked from overseas were found to be better than the sample that was not placed on MDPF by 22~25%. The prototype's reduction efficiency fell to 20%.