• 제목/요약/키워드: Diesel engine turbocharger

검색결과 96건 처리시간 0.023초

볼 베어링 터보차져를 적용시 디젤엔진 성능 특성에 관한 연구 (A Study on Performance Characteristics in Diesel Engine When Applied Ball Bearing Type Turbocharger)

  • 엄명도;김문석;백두성
    • 한국자동차공학회논문집
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    • 제18권4호
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    • pp.74-78
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    • 2010
  • Turbocharger in the application to a diesel engine was widely used in automobile industries for the improvement of engine performance. To comply with stringent emission standards, ball bearing turbocharger has been developed by applying new emission reduction technology. Up to date turbocharger has been proved as an essential part of diesel engines by demonstrating its improved engine performance, fuel efficiency and reduced emission as well. In this research, the performance of the ball bearing turbocharger was compared by the conventional journal bearing type turbocharger. The results shows that ball baring turbocharger was proved to be 10~13% higher fuel efficiency and 30% less average emission than journal bearing turbocharger.

대응출력 150마력 및 240마력 터보차저 선박용 디젤기관의 동력성능 및 배출특성 비교에 관한 연구 (A Comparative Study on Engine Performance and Exhaust Emission Characteristics of Response Power 150HP & 240HP Turbocharged Marine Diesel Engine)

  • 김태현;이치우
    • 한국기계가공학회지
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    • 제12권1호
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    • pp.43-51
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    • 2013
  • This is a thesis about the experiment of comparison characteristic of power and exhaust gas in the same condition between diesel engine that is equipped turbocharger different from response power to increase effectiveness of the engine which is recently used in a lot of industry which requires high power. Resulting of the experiment with natural aspiration diesel engine and turbocharger diesel engine, difference in low speed is not significant, but in high speed, effectiveness of turbocharger diesel engine is much higher than the other one. In other hand, in exhaust gas experiment, turbocharger model exhausts more $NO_X$ and $O_2$, but it doesn't significantly affect the result when it comes with decreasing of $CO_2$ and effectiveness of increased power characteristic. As a result, the turbocharger diesel engine is economically effective comparing with the natural aspiration diesel engine.

대응출력 150마력 터보차저 디젤기관의 동력성능 및 배출특성에 관한 연구 (A Study on Engine Performance and Exhaust Emission Characteristics of Response Power 150HP Turbocharged Diesel engine)

  • 김태현;이치우
    • 한국기계가공학회지
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    • 제11권6호
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    • pp.100-106
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    • 2012
  • This is a thesis about the experiment of comparison characteristic of power and exhaust gas in the same condition between diesel engine that is equipped turbocharger to increase effectiveness of the engine which is recently used in a lot of industry which requires high power. Resulting of the experiment with natural aspiration diesel engine and turbocharger diesel engine, difference in low speed is not significant, but in high speed, effectiveness of turbocharger diesel engine is much higher than the other one. In other hand, in exhaust gas experiment, turbocharger model exhausts more NOX and $O_2$, but it doesn't significantly affect the result when it comes with decreasing of $CO_2$ and effectiveness of increased power characteristic. As a result, the turbocharger diesel engine is economically effective comparing with the natural aspiration diesel engine.

터보 과급기와 중간 냉각기를 장착한 디젤기관의 성능 및 배출가스에 관한 연구 (A Study on Performance and Exhaust GAS Characteristics of the Diesel Engine with Turbocharger and Intercooler)

  • 류규현;정태용
    • 한국자동차공학회논문집
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    • 제7권7호
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    • pp.86-93
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    • 1999
  • Turbocharger has been used to increase the performance of diesel engine, especially ship engine , for years. Recently, the turbocharger is being adopted not only for an agricultural engine but also for an automobile engine. To improve the performance of diesel engine , the problem of the reduction of A/F ratio in high speed should be solved. Turbocharger is well known for its cost effectiveness, reliability and duration . In this study, an experiment was conducted to verify simulation program . The results for natural aspiration engine and turbocharged engine were compared. In order to estimate the characteristics of exhaust gas, D-13 mode was selected. Power, torque and BSFC of turbocharged engine were increased than those of natural aspiration engine by about 48%, 46% and 5%, respectively . The components in exhaust gas except NOx from turbocharger engine were less than the amount set up for 2000-year regulation.

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대응출력 220마력 선박용 과급기에 의한 디젤기관의 출력향상 및 배출특성에 관한 연구 (A study on power improvement emission characteristics of marine diesel engine with response power 220HP turbocharger)

  • 이치우
    • Journal of Advanced Marine Engineering and Technology
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    • 제37권8호
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    • pp.911-917
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    • 2013
  • 최근 높은 출력을 요구하는 각종 산업분야에서 사용되고 있는 디젤엔진의 효율을 높이기 위해 대응출력 220HP 과급기를 장착한 디젤엔진과 자연흡기식 디젤엔진을 동일한 조건에서 동력계와 배출가스 분석기를 통해 동력특성 및 배출가스 특성을 실험한 논문이다. 자연흡기식 디젤엔진과 과급기를 장착한 디젤엔진을 실험한 결과, 저속에서의 동력특성의 차이는 적었으나 고속에서의 동력특성은 과급기를 장착한 엔진의 출력과 효율이 증가한다는 결과를 얻을 수 있다. 이와는 반대로 배출가스 특성에서는 과급기를 장착한 모델에서 $NO_X$$O_2$등의 배출가스가 증가되었으나 $CO_2$의 저감과 동력 특성 증가의 효율을 볼 때 배출가스의 증가치는 적다고 할 수 있다. 이와 같은 결과를 토대로 과급기가 장착된 디젤엔진이 자연흡기식 엔진 대비 효율성 면에서 경제성이 높다라고 예측된다.

Experimental study on the performance of a turbocompound diesel engine with variable geometry turbocharger

  • Yin, Yong;Liu, Zhengbai;Zhuge, Weilin;Zhao, Rongchao;Zhao, Yanting;Chen, Zhen;Mi, Jiao
    • International Journal of Fluid Machinery and Systems
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    • 제9권4호
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    • pp.332-337
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    • 2016
  • Turbocompounding is a key technology to satisfy the future requirements of diesel engine's fuel economy and emission reduction. A turbocompound diesel engine was developed based on a conventional 11-Liter heavy-duty diesel engine. The turbocompound system includes a power turbine, which is installed downstream of a Variable Geometry Turbocharger (VGT) turbine. The impacts of the VGT rack position on the turbocompound engine performance were studied. An optimal VGT control strategy was determined. Experimental results show that the turbocompound engine using the optimal VGT control strategy achieves better performance than the original engine under all full load operation conditions. The averaged and maximum reductions of the brake specific fuel consumption (BSFC) are 3% and 8% respectively.

An Experimental Study on the Improvement of Turbocharger Lag by Means of Air Injection in a Turbocharged Diesel Engine

  • Choi, Nag-Jung;Oh, Seong-Mo
    • Journal of Advanced Marine Engineering and Technology
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    • 제34권7호
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    • pp.951-962
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    • 2010
  • An experimental study was performed to investigate the improvement of response performance of a turbocharged diesel engine under the operating conditions of low speed and fast acceleration. In this study, the experiment for improving the low speed and acceleration performance is performed by means of injecting air into the intake manifold of compressor exit during the period of low speed and application of a fast acceleration from low speed. The effects of air injection into the intake manifold on the response performance were investigated at various applicant parameters such as air injection pressure, accelerating rate, accelerating time, engine speed and load. The experimental results show that air injection into the intake manifold at compressor exit is closely related to the improvement of turbocharger lag under low speed and accelerating conditions of a turbocharged diesel engine. During the rapid acceleration period, the air injection into the intake manifold of turbocharged diesel engine indicates the improvement of the combustion characteristics and gas pressure in the cylinder. At low speed range of the engine, the effect of air injection shows the improvement of the pressure distribution of turbocharger and combustion pressure during the period of gas exchange pressure.

V8형 TCI 디젤기관의 배출가스저감 및 성능개선에 관한 연구 (A Study on the Emission Reduction and Performance Improvement in a V8 Type TCI D.I. Diesel Engine)

  • 윤준규;임종한
    • Journal of Advanced Marine Engineering and Technology
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    • 제29권4호
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    • pp.443-452
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    • 2005
  • The purpose of this study is experimentally to analyze the effects of intake port swirl, injection system and turbocharger on the engine performance and the emission characteristics in a V8 type turbocharger intercooler D.I. diesel engine of the displacement 16.7L, and to suggest the improvement of engine performance. Generally to enhance engine power, TCI diesel engine is put to practically use turbocharged intercooler in order to increase volume efficiency which is cooled boost air. As results of considering the factors of the intake port of swirl ratio 2.25, compression ratio 17.5. re-entrant $8.5^{\circ}$ combustion bowl, nozzle hole diameter ${\phi}0.33{\ast}3+{\phi}0.35{\ast}2$. nozzle protrusion 3.18mm, injection timing BTDC $12^{\circ}CA$ and turbocharger(compressor 0.6A/R+46Trim. turbine 1.0 A/R+57Trim) is the best in the full load in the engine performance and the exhaust characteristics of NOx concentration. Therefore. their factors are appropriated as intake system, injection and turbocharger system.

중형 엔진 터보차져의 원심압축기에 관한 공력학적 3차원 형상 및 구동용 연소기 설계 (Aerodynamic Three Dimensional Geometry and Combustor Design for the Compressor of the Medium Speed Diesel Engine Turbocharger)

  • 김홍원;류승협;갈상학;하지수;김승국
    • 유체기계공업학회:학술대회논문집
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    • 유체기계공업학회 2005년도 연구개발 발표회 논문집
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    • pp.517-524
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    • 2005
  • An aerodynamic design for centrifugal compressor which was applied to medium speed diesel engine has done. First of all, exact compressor specifications must be defined by accurate engine system matching. This matching program has been developed. Using the mean1ine prediction method, geometric design and performance curve for compressor was done and verified by comparing three dimensional viscous CFD results. The deviation at the design point was about 2.3%. Combustor has been designed and manufactured for the performance test of medium speed diesel engine turbocharger. Fuel nozzle of combustor was designed and performed by PIV and PDPA test equipment. Through these results, spray characteristics were studied and flow coefficient equation was deduced.

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터보과급 디젤기관의 과도운전시 응답성능에 관한 연구 (A Study on the Response Performances under Transient Operating Conditions in a Turlblocharged Diesel Engine)

  • 최낙정;이창식
    • 대한기계학회논문집
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    • 제16권8호
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    • pp.1575-1582
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    • 1992
  • 본 연구에서는 정상운전 중인 4사이클 6실린더 터보과급 디젤기관에 갑자기 큰 부하가 작용하였을 경우, 기관 및 과급기 관성 모멘트의 변화가 기관과 과급기의 실제 회전속도, 압축기 압력비, 실린더내 공기유량, 연소효율, 배기온도 등의 과도 응 답성능에 미치는 영향을 시뮬레이션해석과 실험을 통하여 규명하였다.