• Title/Summary/Keyword: Turbocharged Gasoline Engine

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An experimental study on the heat transfer of the turbocharged gasoline engine (터보과급 가솔린의 열전달에 관한 실험적 연구)

  • 최영돈;홍진관
    • Transactions of the Korean Society of Mechanical Engineers
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    • v.14 no.3
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    • pp.664-675
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    • 1990
  • In this study, the performance test and heat transfer experiment for a 4 cylinder and 4-cycle turbocharged gasoline engine were carried out in order to measure the heat transfer coefficient at the inner wall of the combustion chamber. From the result of heat transfer experiment, the energy balance of the fuel energy and the overall efficiency of the turbocharger were calculated, The variation of them was investigated as well with the engine operation conditions.

A Study on the Characteristics of Thermal Flow in a Turbocharged Gasoline Engine (터보과급 가솔린기관의 열유동 특성에 관한 연구)

  • 한성빈;이내현;이성열
    • Transactions of the Korean Society of Mechanical Engineers
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    • v.18 no.11
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    • pp.3046-3056
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    • 1994
  • To design and develop a turbocharged engine, it needs that many studies must be preceded about the characteristics of engine performance and thermal flow. To accomplish this purpose, turbocharger was equipped to 1.3 liter naturally aspirated gasoline engine. The temperature probe of plate type was designed and it was installed into the combustion chamber wall to measure unsteady temperature. The unsteady heat flux at combustion chamber wall was evaluated using one dimensional unsteady conduction equation with the wall temperature and temperature gradient.

Multi-Stage Turbocharger Gasoline IC Engine Simulation for HALE UAV (고고도 장기체공 무인기 적용을 위한 다단 터보차저 가솔린 엔진 시스템 시뮬레이션)

  • Kang, Seungwoo;Bae, Choongsik;Lim, Byeungjun
    • Journal of the Korean Society of Propulsion Engineers
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    • v.23 no.1
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    • pp.101-107
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    • 2019
  • This study conducted a simulation to observe the performance of a multi-turbocharged gasoline internal combustion engine for a high-altitude long-endurance unmanned aerial vehicle (HALE UAV). The WAVE 1-D engine simulation software from Ricardo was used for the engine system modeling and simulation. The specifications of a 2.4-L four cylinder gasoline engine from commercial vehicles and maps of commercial vehicle turbochargers were applied to the multi-stage turbocharged engine system model. Three turbochargers and intercoolers were installed in series for the appropriate intake of pressure for the gasoline engine at a high altitude of 60,000 ft. There was one wastegate for the turbochargers. The operability of the engine system was analyzed via this simulation model.

Study on the Prediction of Performance and Emission in a 4-Cylinder 4-Stroke Cycle Turbocharged Gasoline Engine (First Paper) (4기통 4사이클 터보과급 가솔린 기관의 성능 및 배기조성 예측에 관한 연구 (제1보))

  • 유병철;이병해;윤건식
    • Journal of the korean Society of Automotive Engineers
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    • v.10 no.6
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    • pp.25-38
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    • 1988
  • As a mean of increasing engine power, great attention has been concentrated on the turbo-charging owing to better fuel economy, smaller engine size and lower emission. The performance in turbocharged engine depends not only on the efficiency of the engine and the turbocharger used, but also on the total characteristics of the system by the matching turbocharger to the engine. The matching of the turbocharger to the engine has been usually accomplished by the empirical techniques with a great deal of laborious work. It would be better to predict the performance and emission in the turbocharged engine using the effective simulation model. In this study, computer simulation program has been developed to predict the transient variation of properties of gas in the cylinder, intake and exhaust pipes, the engine performances and emissions.

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Analysis of heat conduction of cylinder block of turbocharged gasoline engine by boundary element method (경계요소법에 의한 터보과급 가솔린기관 실린더블럭의 열전도 해석)

  • 김은태;최영돈;홍진관
    • Journal of the korean Society of Automotive Engineers
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    • v.11 no.2
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    • pp.41-54
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    • 1989
  • In this study, steady state heat conduction problems of the cylinder block of turbocharged gasoline engine were solved by the boundary element method. Surface of the cylinder block was divided by the triangular cells with constant potential. Temperature distribution, effective heat transfer coefficient of the cylinder block were investigated with variation of equivalence ratio, engine speed and boost pressure. The results show that maximum temperature of cylinder block increase rapidly with increasing engine speed and boost pressure. The monolithic structure of cylinder block results in sever inhomogeneity of inner wall temperature at the high engine speed and boost pressure.

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Heat Conduction Analysis of the Cylinder Head in Turbocharged Gasoline Engine by Boundary Element Method (경계요소법에 의한 터보과급 가솔린기관 실린더헤드에 대한 열전도 해석)

  • 최영돈;홍진관
    • Transactions of the Korean Society of Mechanical Engineers
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    • v.13 no.4
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    • pp.739-752
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    • 1989
  • The temperature distribution and heat flux of the inner wall of the cylinder of turbocharged gasoline engine were calculated by the 3-dimensional heat conduction analysis employing boundary element method. Overall mean effective heat transfer coefficient and thermal resistance ratio and equivalent thickness of the cylinder wall were calculated. the numerical results were discussed with respect to the engine speed, equivalence ratio, spark and boost pressure.

Characteristics of Transient Performance in a Turbocharged GDI Engine with TiAl Turbine (TiAl 터빈을 적용한 과급 직분식 전기점화 엔진의 과도운전 성능특성)

  • Park, Chansoo;Jung, Jinyoung;Bae, Choongsik
    • Transactions of the Korean Society of Automotive Engineers
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    • v.23 no.3
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    • pp.299-306
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    • 2015
  • Turbocharged gasoline direct injection engine is one of promising technologies in the automotive industry. However, reduction in turbo-lag under transient operation is one of important challenging points to improve drivability. Engine transient performance was investigated in a 4-cylinder 2.0 L turbo-gasoline direct injection (T-GDI) engine using Inconel and TiAl (Titanium Aluminide alloy) turbine wheel turbochargers. The TiAl turbocharger performed superior transient boost pressure and torque rises under various engine transient operation conditions. These were mainly due to lower turbine rotational inertia of TiAl turbocharger. The Maximum boost pressure and torque build up were founded in 1500 rpm and 2000 rpm, instant load change from 20% to 100% of pedal position.

The Experimental Equation to Predict the Power in a Turbocharged Gasoline Engine (터보과급 가솔린기관의 출력예측을 위한 실험식)

  • 한성빈;이내현;이성열
    • Transactions of the Korean Society of Mechanical Engineers
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    • v.19 no.2
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    • pp.580-590
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    • 1995
  • To design and develop a turbocharged engine, ti needs that many study must be preceded about the characteristics of engine performance. Especially, a basic data about deciding target power is urgently needed for which is practically useful for engine design. The power output of turbo-charged engine is dominated by engine speed, displacement, compression ratio, air fuel ratio and charge pressure ratio. Therefore, the independent effect of these factors on power output was clarified from experiment, and the experimental equation to predict the power was founded from there results. The predicted power output from the experimental equation was well coincided with power measured through experiment.

Analysis of the Stedy and Unsteady Heat Conduction in the Cylinder Block Attached with Rectangular Fin (직사각형 휜이 부착된 실린더 블럭의 정상 및 비정상 열전도 해석)

  • 이건휘;최영돈
    • Transactions of the Korean Society of Mechanical Engineers
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    • v.14 no.5
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    • pp.1254-1263
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    • 1990
  • The temperature distribution and heat flux of the inner cylinder wall of a 4-cycle turbocharged gasoline engine were calculated by a 2-dimensional coordinate transformation. Boundary conditions of the inner wall of the cylinder were taken from the results of diagnostic engine simulations. Results show that the ununiformity of inner wall temperature of the cylinder black can be reduced by a proper choice of the thickness of fin and the distance between two cylinder blocks.

An Analytical and Experimental Study on the Improvement of Performances of a Gasoline Engine of the Light Passenger Car (Second Paper) (경승용차용 가솔린 기관의 성능향상에 관한 이론 및 실험적 연구(제2보) - 이론 해석을 중심으로)

  • 윤건식;서문진
    • Transactions of the Korean Society of Automotive Engineers
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    • v.9 no.5
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    • pp.62-74
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    • 2001
  • In this study, the prediction of performances and emissions of the gasoline engine of a light passenger car has been accomplished. The method of characteristics including friction, heat transfer, area change and entropy gradients was used to analyze the flow in the intake and exhaust systems. For in-cylinder calculation, the single-zone model was adopted for the periods of the intake, exhaust, compression and the expansion of the burnt gas and the 2-zone expansion model was applied to the period of combustion process. The simulation program was verified by comparison with the experimental values both for the naturally aspirated engine and the turbocharged engine showing good agreements. Using the simulation program, multi-valve system and turbocharging were examined as a means of increasing engine Performances.

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