• 디지털융복합연구
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• 제17권12호
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• pp.203-210
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• 2019

오늘날 대부분의 자동차는 전자제어를 통하여 엔진의 상태를 제어하여 최적의 성능을 얻을 수 있도록 하고 있다. 본 연구는 캔통신을 이용하여 자동차의 엔진의 정보를 운전자에게 실시간으로 화면에 표시하여 고장진단과 최적의 자동차 상태를 유지하는 장치를 개발하였다. 이 시스템은 엔진에서 발생되는 정보를 OBD2 소켓을 통하여 엔진의 흡배기온도, 현재 배터리 전압, 타이어 공기압, RPM, DPF 포집량, 토크, 마력 등의 정보를 실시간으로 운전자에게 표시하여 운전자가 차량의 상태를 즉시 확인이 가능하다. 타이어의 공기압을 측정하여 화면에 표시하여 안전운행에 도움을 줄 수 있으며, 자신의 취향에 맞도록 변속타이밍을 설정할 수 있는 모드를 제공한다. 특히 디젤엔진 자동차의 경우 매연으로 인한 문제는 자동차 성능과 환경오염에 악영향을 미칠 수 있으므로 시스템 화면에 DPF 포집량을 표시하여 환경오염 방지와 효율적인 자동차 관리를 할 수 있도록 시스템을 개발하였다.

• 한국공작기계학회:학술대회논문집
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• 한국공작기계학회 1997년도 추계학술대회 논문집
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• pp.316-321
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• 1997

The purpose of this study is to reduce the vibration noise of differential gear by reducing torque fluctuation of drive pinion shaft which causes vibration noise of differential gear in rear wheel drive vehicles. For this we developed multi-degree of freedom analysis model in which mass moment of inertia and torsional spring combined, the validity of the simulation model was checked by the field test and we examined the influence of torsional vibration of driveline elements by performing forced vibration analysis of engine excitation torque. We studied the methods for reducing torsional vibration of driveline according to the design factor of propeller shaft and examined the effects reducing vibration differential gear by applying flexible coupling.

• 오토저널
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• 제7권3호
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• pp.11-18
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• 1985

세계경제가 만성적으로 저미한 상태에서, 전세계적으로 자동차 생산도 크게 성장하기를 바랄 수 없는 상황이 계속 되고 있다. 한편, 승용차의 기술면에서는, 배기가스 규제대응기술의 개발이 일 단락되고, 석유사정도 일단은 안정상태를 유지하고 있는 가운데, 자동차 본래의 기능 및 유용성을 높이기위한 기술개발에 힘을 기울여 왔다. 승용차의 구동방식에 대해서도 FF(Front Engine, Front Drive)방식이 세계적인 추세이고, 더욱이 4WD(사윤구동차)의 보급이 주목되고 있다. 또 이지 드라이브(Easy Drive)화에의 움직임도 강하여 AT(Automatic Transmission, 자동변속기)가 부착된 자동차의 비율이 검증하고 있으며, 유체토오크 컨버어터(Fluid Torque Converter)와 유 성치차장치(Planetary gear)식의 변속 장치를 조합한 AT는 전자제어기술에 의한 정확한 제어로 그 완성도가 더욱더 높아지고 있다. 또 종래로부터 새로운 AT로서의 기술동향이 주목되고 있 었든 CVT(무단변속기)도 실용화 기술의 개발이 진척되어 일부 양산화 모델의 발표도 있으며, CVT가 AT중에서 그위치를 크게 차지하게 될 날도 머지않은 것으로 생각된다. 이하 근년 관심이 높아지고 있는 4WD 및 AT를 중심으로 승용차의 구동방식과 그 기구의 동향을 해설하기로 한다.

• 한국정밀공학회지
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• 제24권12호
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• pp.74-81
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• 2007

This paper focuses on improvement of the reliability for endurance test to serve military automobiles. The driving loads have been measured by use of the wireless telemetry system for the drive shaft of the 4-wheel drive car. In order to analyze the transmission input torque and engine revolution of loads of the test courses and unpaved road have been made use of the revolution counting and cumulative damage by miner's rule. This paper presents the evaluated result for quantified damage about the test courses and roads.

• Nuclear Engineering and Technology
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• 제29권2호
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• pp.167-174
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• 1997

The method that the operating condition of Control Rod Drive Mechanism (CRDM) can be monitored without mounting sensors within CRDM housing was developed, and by using this developed method the closed-loop controller for the CRDM was designed which can optimize the performance and maximize the reliability of CRDM operation. Neural network is utilized as pattern recognition engine in detecting CRDM actuation. In this paper, most problems in previous open loop system are resolved. The control algorithms for closed-loop system ore developed and implemented within the hardware of timing controller based on microprocessor. All functions in the timing controller ore verified by means of real time CRDM simulator. The results show that the timing controller performs its intended functions properly.

• 전기학회논문지P
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• 제58권3호
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• pp.235-240
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• 2009

In automobile, the introduction of electronically commutated motors has been accompanied by a proliferation of electronic devices. With this proliferation of electronic devices, an emphasis has been placed on EMC issues. This paper is proposed to use SRM as a radiator cooling fan in automotive applications. To drive SRM, Energy efficient C-dump converter is applied. Energy efficient C-dump converter, derived from the conventional C-dump converter, is proposed as a switched reluctance motor (SRM) drive for automotive engine cooling application. It is verified more efficient than other converters through simulation and experiments. And also SRM is valid for automotive applications that have strict EMC standards. Simulation and experimental results obtained on a laboratory prototype are finally presented to evaluate the performance.

• 한국자동차공학회논문집
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• 제15권2호
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• pp.182-186
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• 2007

This paper studied performance characteristics of hybrid automotive to replace existing fossil fuel vehicles. Specially, about power split type HEV that is T-HEV's drive system when a vehicle drives at steady speed, monitored both output of each engine, motor and generator and battery SOC (state of charge) and analyzed performance characteristic of power transmission system and electricity power parts. This study shows those that acquired and analyzed information from signals between HCU and each controller of actual T- vehicle. From this study, it is confirmed that each conditions of EV and HEV drive can be a improvement with respect to the fuel efficiency of vehicles.

• International Journal of Aeronautical and Space Sciences
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• 제11권4호
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• pp.313-318
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• 2010

The power plant system of a tilt rotor unmanned aerial vehicle (UAV) was verified by the Ironbird ground test, which considerably reduces cost and risk during the developmental stages. The function and performance of the engine, drive line, nacelle conversion, and rotor systems were evaluated using a building block test approach. The Ironbird test concept facilitates the discovery of potential faults in earlier stages of the testing period. As a result, the developmental testing period could effectively be shortened. The measured test data acquired through a ground control and data acquisition system exhibited satisfactory results which meet the developmental specifications of a tilt rotor UAV.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2017년도 추계학술발표대회
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• pp.526-529
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• 2017

Deep Drive 플랫폼 개발 기술인 HILS(Hardware In the Loop Simulation)는 시스템 모델에 근간을 둔 실시간 시뮬레이션 기법과 H/W를 접목시킨 실시간 해석 기법으로, 플랫폼 개발으로 현재는 난해성이 있는 자율 주행 자동차 실차의 테스트 베드를 구현하여, 여러 가지 실험을 통해 실제 차의 운행에 대한 피드백을 제공, 운전자로부터 안전을 보장하기 위한 기술 보장, 기술의 상용화, 양산화 연구에 도움을 줄수 있음.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2003년도 춘계학술대회논문집
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• pp.342-352
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• 2003

Idle NVH characteristics are one of the most important aspects among the vehicle performances. Vehicle developers are devoted to improve vehicle interior noise and steering wheel and seat vibrations. In order to improve the idle quality, noise and vibration transfer path should be carefully evaluated. Also, effects of various components related to the idle performance should be confirmed. A general procedure for improving the idle qualify is described in detail. The relationship among cylinder pressure characteristics, crankshaft rotational speed variation, and vehicle vibrations is also investigated. Influences of drive shaft, torque converter, air conditioning system, vehicle structure including engine mount system, and idle control parameters on the vehicle idle quality are studied. Weak points of typical vehicles on the idle qualify are identified. Some of improvement measures are proposed and verified.