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가솔린기관의 연비향상을 위한 전자스로틀 밸브 제어에 관한 연구
이동원(Tongwon Lee),안동준(Dongjun Ahn),김근식(Keunsik Kim),김근묵(Geunmook Kim),서원수(Wonsu Seo) 한국자동차공학회 2008 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In this paper, we proposed the electronic throttle controller(ETC) for the fuel economy of the gasoline engine by the CompactRio embedded control system. A CompactRIO embedded system features a real-time embedded processor, 4 or 8-slot reconfigurable chassis containing a user-programmable FPGA, and hot-swappable industrial I/O modules. Electronic throttle valve and Accelerator pedal module equipped with the Accel position sensor(APS) is used for the control. The control program is written by the LabView 8.5 software and is downloaded to the CompactRio embedded control system. To reduce the fuel consumption, we studied the ETC control algorithm of the gasoline engine.
[가솔린엔진부문] 냉시동시 배기가스 온도 측정에 의한 가솔린기관의 공연비 예 측
이동원(Tongwon Lee),장현탁(Hyuntak Jang),배충식(Choongsik Bae),Dennis Assanis 한국자동차공학회 2000 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
A new estimator for A/F ratio in SI engines is described. A considerable fraction of the HC emissions from internal combustion engines are generated just after the engine is started. HEGO oxygen sensor cannot measure the A/F ratio of exhaust gas during cold start condition. The A/F ratio estimator described in this study is based on the measurement of the exhaust gas temperature, air flowrate, and coolant temperature, etc. A/F ratio can be estimated indirectly in that the exhaust gas temperature relies on A/F ratio of Exhaust gas. The HC emissions are also measured during the cold start condition. The Generalized Regression Neural Network Function Approximation(GRNN) is used to estimate the A/F ratio of exhaust gas.
[가솔린엔진부문] 냉시동시 미연 탄화수소의 저감을 위한 가솔린기관의 제어기 연구
이동원(Tongwon Lee),장현탁(Hyuntak Jang),변창수(Changsu Byoun),윤대호(Daeho Yun),배충식(Choongsik Bae) 한국자동차공학회 2001 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2001 No.11_1
During the warming-up period, the amount of hydrocarbon emisson is very high. In order to reduce hydrocarbon emission in gasoline engine, it is necessary to estimate the fuel and fuel product flowrate in the emission gas. The fuel in the intake manifold and cylinder is estimated by the "wall-wetting" effect calculation. The rapid prototype engine controller has been developed by using MATLAB, SIMULlNK, REAL TIME WORKSHOP, and WATCOM C++. The sensor data from the engine is transferred to laptop computer, and the fuel delivery is calculated. The fuel is injected into the engine as the engine controller of the laptop computer calculates. The fuel control logic in the cold start condition is based upon the "wall wetting" effect calculation. By combining the technologies described above, development of a controller to reduce the hydrocarbon emission during cold start is the focus of this study.
비 인출식 엔진 회전수 검출을 위한 Signal Conditioning 필터의 설계
안동준(Dongjun Ahn),이동원(Tongwon Lee),김근식(Keunsik Kim),서원수(Wonsoo Suh) 한국자동차공학회 2007 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In this paper, we proposed to design strategy of signal conditioning filter systems for the detection of engine RPM data which acquired to cigar jacks for useful facility(plug & play) of fuel efficiency monitoring systems. Signal conditioning filter strategy has high and low pass filters design procedures for the extract of periodical engine RPM signals with noise-like vehicle DC power lines. Also proposed systems using FFT methods for more precious detections of engine RPM datas which decided from regularly intervals of each frequency peaks elements from FFT results. Hardware design procedures includes SMPS design techniques for the stability of systems.
디젤기관의 배출가스 와류기 영향에 의한 유동특성에 관한 연구
김영일(Youngil Kim),김권세(Kwonse Kim),이동원(Tongwon Lee),홍금표(Geumpyo Hong),정승현(Seunghyun Jeong) 한국자동차공학회 2021 한국자동차공학회 지부 학술대회 논문집 Vol.2021 No.5
This work is to attempt the experiment and analysis to investigate the effects of exhaust flow and fuel consumption efficiency. The vortex formed with mixer structure in an exhaust muffle is measured IM240 mode during working an engine. The experiment device is used as mixer structure capable of forming the vortex in experimental and analytic model. The mixer is used to analyze distribution characteristics of pressure, velocity, and temperature. The analytic condition is equally fitted by 106,101 with regards to total cells and fluid cells in virtual mesh setup. The fluid cells contacted with solid is set as 44,799. As a result, although the velocity is significantly increased by vertex strength and shearing strength when being applied with a mixer model, it could be seen that the noise is reduced rather than in case of not applied with mixer. Consequently, fuel consumption efficiency measured by IM240 is shown to be partially increased in case of applying a mixer from 17.2km/L to 22.9km/L.