• Journal of Digital Convergence
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• v.17 no.12
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• pp.203-210
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• 2019

Most cars today use electronic control to control the state of the engine to achieve optimum performance. This study developed a device for maintaining fault diagnosis and optimal vehicle status by displaying the engine information of a car on the screen in real time using can communication. This system displays information generated from the engine to the driver in real time such as engine intake and exhaust temperature, current battery voltage, tire pressure, RPM, DPF collection amount, torque, and horsepower through the OBD2 socket. You can check immediately. It can help you to drive safely by measuring tire pressure and displaying it on the screen, and it provides a mode to set the shift timing to suit your taste. In particular, in the case of diesel engine cars, the problems caused by smoke can adversely affect the performance and environmental pollution. Therefore, the system was developed to display the DPF collection amount on the system screen to prevent environmental pollution and to manage the vehicle efficiently.

• Proceedings of the Korean Society of Machine Tool Engineers Conference
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• 1997.10a
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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.

• Journal of the korean Society of Automotive Engineers
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• v.7 no.3
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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.

• Journal of the Korean Society for Precision Engineering
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• v.24 no.12
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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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• v.29 no.2
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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.

• The Transactions of the Korean Institute of Electrical Engineers P
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• v.58 no.3
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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.

• Transactions of the Korean Society of Automotive Engineers
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• v.15 no.2
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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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• v.11 no.4
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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.

• Proceedings of the Korea Information Processing Society Conference
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• 2017.11a
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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.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2003.05a
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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.