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Simsoo Park
Simsoo Park | Professor
416, School of Mechanical Engineering, Korea University, Anam-dong, 5-Ga, Seongbuk-Gu, Seoul, Korea, 136-713
Feb. 1977 B.S of Mechanical Engineering, Seoul National University, Seoul, Korea
Feb. 1979 M.S of Mechanical Engineering, Seoul National University, Seoul, Korea
Feb. 1991 Ph.D of Mechanical Engineering, SUNY at Stony Brook, New York, USA
Internal Combustion Engine Lab.
Nanoparticle formation characteristics from internal combustion engines and vehicles
Particle Matter (PM) emitted from vehicles affects adverse the environment and health effects. Therefore PM emitted is going to regulate also PM mass and PM number. Particle emission characteristics from engine with gasoline, diesel, LPG and low-carbon fuels were analyzed during various operating conditions. And particle emission characteristics from vehicles were analyzed during various driving modes.
Analysis of engine combustion system with CVVT and optimization technology development
In SI engines, valve events have a major influence on volumetric efficiency, fuel economy and exhaust emissions. This study investigated the behaviors of an engine and the combustion phenomenon for various intake valve timings, spark timings and intake charge motions by port masking schemes in the CVVT engine. And 3-D computational analysis was also executed to estimate the flow characteristics and the fuel behaviors visibly and quantitatively for various intake and exhaust valve timings including the port maskings.
Research on the PM formation mechanism and development of reduction system from GDI engine
GDI engines have widely adopting recently for advantages in engine performance and fuel economy compared with conventional MPI gasoline engines, but disadvantages in particulate matter, not only its mass but also number, have becoming a problem. The objective of this study is analyzing the nano-particle characteristics exhausted from a GDI engines and achieving improvement of EMS control logics to reduce PM emission from the GDI engines and vehicles.
Research and Development on the Urea-SCR system for Diesel Engine
Urea SCR system is widely used for heavy duty commercial vehicle to meet the stringent NOx emission standards. However, urea SCR system has some problems such as ammonia slip and urea deposition in the exhaust pipe. Therefore, systematic optimization on the urea dosing components including SCR catalyst is absolutely required to confirm the high purification performance. In this research, Urea-SCR Dosing System was developed and experimented at the engine test. Numerical Simulation was performed about Urea injection and evaporation at the SCR catalyst. Various effects on the NOx conversion efficiency was considered in this research. The objective of this research is optimization on the Urea-SCR system for the light-duty and heavy duty diesel engines.
Research on the LNT System for Light Duty Diesel Engine
LNT System is widely used for light duty diesel engine. LNT system has advantage on the point of cost effectiveness than Urea-SCR system. Therefore many vehicle companies adapted LNT system in light-duty diesel engine for NOx reduction. In this research, Micro Reactor System was designed and RIG experiment was performed using modal gas such as NO, CO, O2, CO2, H20, C3H8. And 1D/3D computational analysis was performed about chemical reaction at the catalyst monoliths. The objective of this research is to optimizing of LNT system for the light-duty diesel engines.
Research on the Effect of Bio Ethanol Fuel on Engine Performance and Exhaust Emission Characteristics
Ethanol is considered as one of the most promising alternative automotive fuels in worldwide. In this research, 1-D cycle simulation was performed on the engine performance engine of ethanol blend. And experimental result which is performed on commercial SI engine using bio-ethanol presents. The ethanol was blended with gasoline 0, 10 and 20 vol.%. To objective of this research is the engine performance, fuel economy and emission characteristics compared with using gasoline. Moreover, unburned ethanol and acetaldehyde is analyzed with Gas Chromatography and Liquid Chromatography.
Development, research and optimization of hybrid engine model
Hybrid vehicle needs its simulator because it provides appropriate optimization of hybrid vehicle system and reduce time for development. So, in this research we made engine modules. It constitutes hybrid simulator and it made by MATLAB simulink. Data about engine performance was obtained by 1D analysis using WAVE. Result of WAVE is corresponded to result of engine experiment. It is shown that engine module has reliability. Hybrid vehicle simulation was performed by connection another module such as battery, motor, and HCU.
Research on the Exhaust System Optimization for the Better Use of Catalytic Converter
As the current and future emission regulations become stringent, the research on exhaust manifold with CCC (Close Coupled Catalyst) has been the interesting and remarkable subject. To design of exhaust manifold with CCC is a difficult task due to the complexity of the flow distribution caused by the pulsating flows that are emitted at the exhaust ports. This research is concerned with the theoretical and experimental approach to improve catalyst flow uniformity through the basic understanding of exhaust flow characteristics. Computational and experimental approach to the flow for exhaust manifold of 4-cylinder gasoline with 900 cell CCC system was performed to investigate the flow distribution of exhaust gases. In this research, through calculation, the effects of geometric configuration of exhaust manifold on flow structure and its mal-distribution in monolith were mainly investigated to understand the exhaust flow patterns in terms of flow uniformity. In order to simulate the actual exhaust flow from engine, the simulated dynamic flow bench was designed which was composed of blower, the cylinder head including exhaust system of gasoline engine. Pressure distribution of exhaust manifolds was measured with 5-hole pitot probe. The pressure distribution at the catalyst outlet was tested with simulated dynamic flow bench.