• Title/Summary/Keyword: Heavy duty diesel engine

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Structural Analysis on the Heavy Duty Diesel Engine with Compacted Graphite Iron (CGI를 이용한 대형 디젤엔진의 구조해석)

  • Lee, Jae-Ok;Lee, Young-Shin;Lee, Hyun-Seung;Kim, Jae-Hoon;Jun, Joon-Tak;Kim, Chul-Goo
    • Proceedings of the KSME Conference
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    • 2007.05a
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    • pp.602-607
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    • 2007
  • The heavy duty diesel engine must have a large output for maintaining excellent mobility. The compacted graphite iron (CGI) is a material currently under study for the engine demanded for high torque, durability, stiffness and fatigue. In this study, three dimensional finite element model of a heavy-duty diesel engine was developed to conduct the stress analysis by using property of CGI. The FE model of the heavy duty diesel engine section consisting with four half cylinder was selected. The heavy duty diesel engine section include cylinder block, cylinder head, liner, bearing cap, bearing and bolt. The loading conditions of engine are pre-fit load, assembly force and gas force.

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An Effect of Wet Type Air Filter in Heavy-Duty Diesel Engine (대형디젤기관에 미치는 습윤식 에어 필터의 영향)

  • 김미수;나완용;오용석
    • Transactions of the Korean Society of Machine Tool Engineers
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    • v.13 no.3
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    • pp.98-103
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    • 2004
  • Diesel engine offers superior fuel consumption than gasoline engine of equivalent capacity. For this reason, diesel engines are widely used in heavy duty transport applications. Specially, it has been many years that exhaust gases from gasoline automobile rather than from diesel is the major object concerned by Korea and other countries, and it is strongly required on the reduction techniques on harmful NOx, Soot, CO, He. Thus, this paper focused on the emission reduction and target for this paper is heavy-duty diesel engine equipped with power filter such as wet type air cleaner. In this paper, the performance, exhaust emissions(CO, THC, NOx, Soot) and noise of heavy-duty diesel engine were measured at maximum load condition and the range of 1,000∼2,200rpm. The smoke was measured at FAS(Free Accel Smoke) test mode.

An Experimental Study on Emission Reduction by Low Sulfur Diesel Fuel in Diesel Oxidation Catalyst of Heavy Duty Diesel Engine (대형디젤기관의 디젤산화촉매장치에서 저유황 경유에 의한 배출가스 저감에 관한 실험적 연구)

  • 요용석;강호인;한영출
    • Transactions of the Korean Society of Automotive Engineers
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    • v.6 no.3
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    • pp.138-142
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    • 1998
  • Among aftertreatment devices which reduce exhaust gas of diesel engine, diesel oxidation catalyst(DOC) with high reduction efficiency for gaseous matter and particulate matter is now being studied actively. In this study, an experiment was conducted to analyze the effects of low sulfur diesel fuel in heavy duty diesel engine equipped with DOC. We tested to estimate change of engine performance for the low and high sulfur diesel fuels in a 11,000cc diesel engine equipped with DOC. We conducted test to estimate the reduction efficiency of exhaust gas in D-13 mode of heavy duty diesel regulation mode and in smoke opacity mode for two samples of high sulfur content (0.2%) and low sulfur content(0.05%)

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Structural Analysis on the Heavy Duty Diesel Engine and Optimization for Bearing Cap (대형 디젤엔진의 구조응력해석 및 베어링 캡의 최적설계)

  • Lee, Jae-Ok;Lee, Young-Shin;Lee, Hyun-Seung;Kim, Jae-Hoon;Jun, Joon-Tak;Kim, Chul-Goo
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.32 no.5
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    • pp.402-410
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    • 2008
  • The heavy duty diesel engine must have a large output for maintaining excellent mobility. In this study, a three dimensional finite element model of a heavy-duty diesel engine was developed to conduct the stress analysis. The FE model of the heavy duty diesel engine main parts consisting with four half cylinder was selected. The heavy duty diesel engine parts includes with cylinder block, cylinder head, gasket, liner, bearing cap, bearing and bolts. The loading conditions of engine were pre-fit load, assembly load, and gas load. As the results of structural analysis, because the stress values of cylinder block and bearing cap did not exceed the basic design can be satisfied. But on the part which contacts with cylinder block and bearing cap the stress value exceeds the allowable strength of material. In order to decrease the stress at that part, it was optimized with parametric study.

Effect of Coolant Flow Passages Between Cylinder Blocks on the Cooling Performance of a Heavy-duty Diesel Engine (실린더 블록 사이의 냉각수 유입홀이 대형 디젤엔진의 냉각성능에 주는 영향)

  • Lee, Sang-Kyoo;Rhim, Dong-Ryul;Lee, Sang-Up;Kim, Min-Jung;Yoo, Seung-Hyun
    • 유체기계공업학회:학술대회논문집
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    • 2006.08a
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    • pp.341-344
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    • 2006
  • In this analytical study on the engine coolant flow of a heavy-duty diesel engine with 4 valves and linear-type 8 liter 6 cylinders, the characteristics of pressure drop and engine cooling performance with the additional coolant passages between cylinder blocks have been investigated. Since the most part of pressure drop is caused by the coolant flow passages inside a cylinder head and cylinder blocks for this type of heavy-duty diesel engines, the advantage of pressure drop is just 2.6% and the characteristics of heat transfer and the distribution of coolant velocities in the head part show little differences in case of additional coolant passages. Thus the coolant flow passages between cylinder blocks make little contribution on the cooling performance of heavy-duty diesel engines

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A Exhaust Gas Study by EGR in Heavy-Duty Diesel Engine (대형디젤기관에서 EGR에 의한 배출가스 연구)

  • 한영출;류정호;오용석;이현우;강호인
    • Journal of Korean Society for Atmospheric Environment
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    • v.16 no.3
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    • pp.285-291
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    • 2000
  • EGR(Exhaust Gas Recirculation) is known as the technique reducing the NOx emissions from diesel engine. Low pressure roote and high pressure roote are applied for heavy-duty diesel engine are. In this study, as research for the heavy duty diesel engine equipped with EGR, reduction characteristic of CO, THC, NOx, and PM in HD diesel engines are investigated by applying EGR device. Also, through the experiments using 11 liters, turbocharged diesel engine with EGR valve and intercooler, exhaust gas reduction characteristics were measured as changing in EGR rate according to D-13 mode.

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Study on Low Pressure Loop EGR System for Heavy-duty Diesel Engine to Meet EURO-5 NOx Regulation (LPL EGR System 적용 대형 디젤엔진의 EURO-5 NOx 규제대응에 관한 연구)

  • Lee, K.S.;Baek, M.Y.;Park, H.B.
    • Journal of Power System Engineering
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    • v.11 no.4
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    • pp.12-17
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    • 2007
  • Recently, many small and medium size diesel vehicles have been equipped with turbocharger and EGR system to get high performance and reduce $NO_x$ emissions but its application to heavy-duty diesel engine is not common yet. In this work, the simulation model for EURO-3 engine was developed using WAVE and then its performance and emission level were verified by comparing with experimental results. The possibility of current EURO-3 engine equipped with LPL EGR system which would be satisfied the EURO-5 regulation are examined. ESC 13 mode was chosen as the primary engine test mode, and the injection timing and fuel quantity were changed to compensate the lost engine performance caused by EGR. The system developed in this study shows that the current EURO-3 engine could satisfy EURO-5 $NO_x$ regulation by applying LPL EGR.

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A Study of Low Temperature Combustion System Optimization for Heavy Duty Diesel Engine (대형디젤엔진의 저온연소 시스템 최적화에 관한 연구)

  • Han, Youngdeok;Shim, Euijoon;Shin, Seunghyup;Kim, Duksang
    • Transactions of the Korean Society of Automotive Engineers
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    • v.23 no.2
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    • pp.178-184
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    • 2015
  • According to the regulation on the environment and fuel efficiency is becoming strict, many experiments are conducted to improve efficiency and emission in internal combustion engines. LTC (Low temperature combustion) technology is a promised solution for low emissions but there are a few barriers for the commercial engine. This paper includes optimization that applies LTC method to heavy duty diesel engine. Adequate LTC was applied to low and middle load as adaptability in heavy duty diesel engine, and optimization focused on reduction of fuel consumption was proceeded at high load. Through this research, strategy for practical use of LTC was selected, and fuel consumption has improved on the condition that satisfies the emission regulation at systematic viewpoint.

A Comprehensive Study on Fuel Injector Test Bench for Heavy Duty Engine

  • Das, Shubhra Kanti;Thongchai, Sakda;Lim, Ocktaeck
    • Journal of ILASS-Korea
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    • v.20 no.3
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    • pp.195-201
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    • 2015
  • This study discusses a fuel injector test bench containing a mechanical type fuel supply system for heavy duty diesel engine. The main focus of this study was to evaluate the design stability of the test bench, which basically measures the injector durability of a multi-hole heavy duty injector by using pure diesel as a test fuel. In this experiment, diesel spray was controlled by a specially designed control box and all the experiments were carried out to measure e.g. fuel injection pressure and fuel injection quantity to understand the injection status which is interlinked with the stability factor of total test bench design. Also, the durability test was performed to understand the heavy duty operation lastingness of the designed system and the flow rate of the installed distributor pump in the fuel supply system of this studying test bench was compared with LO-1 and LO-2 pump. The results of the above mention tests revealed that the injector test bench design and control system can serve the purpose for heavy duty injector.

An Experimental Study on Performance and Exhaust Gas in a Heavy-Duty Diesel Engine with Cooled-EGR (Cooled-EGR 대형디젤기관의 성능 및 배기가스에 관한 실험적 연구)

  • 한영출;오용석;오상기
    • Transactions of the Korean Society of Automotive Engineers
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    • v.9 no.5
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    • pp.1-8
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    • 2001
  • It is a present situation that the control on automobile emission is getting more restrictive and also the regulations for emission are changing greatly up to level of those advanced foreign countries. Specially, it has been many years that exhaust gases from gasoline automobile rather than from diesel is the major object concerned by Korea and other countries, and it is strongly required on the reduction techniques on harmful NOx and PM among those compositions. Thus, this research focused on the Exhaust Gas Recirculation (EGR) and the target for this research is heavy-duty turbo-diesel engine with Cooled EGR. Furthermore, this research has been made efforts to accomplish the regulation on emission for heavy duty diesel engine.

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