• 오토저널
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• 제23권4호
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• pp.23-31
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• 2001

• 한국기계기술학회지
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• 제13권4호
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• pp.157-164
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• 2011

Hybrid car can improve fuel efficiency using a power of motor that is generated during constant-speed or deceleration driving. The motor is located between engine and transmission. But, when voltage of main battery is low, fuel efficiency is low because the voltage can't run the motor. In this situation, this study observed fuel efficiency when using solar cell for assistance power. In order to verify a fuel consumption of hybrid car equipped solar cell for assistance power, the car was tested downtown driving. As hybrid car was equipped solar cell for assistance, fuel consumption was reduced 8.35 % at running air conditioner. And, at air conditioner doesn't work, fuel consumption was reduced 6.88 %. This point of view, CO2 is expected to reduce in similar proportion.

• 통상정보연구
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• 제14권3호
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• pp.139-158
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• 2012

자동차산업에 있어서 FTA는 매우 중요한 무역정책 중 하나이다. 자동차산업이 국가의 고용과 생산에서 차지하는 비중이 큰 만큼 대부분의 국가들이 취하는 보호무역조치가 자동차산업을 타깃으로 하는 사례가 많기 때문이다. 이러한 관점에서 한 콜롬비아 FTA를 비롯해 한 페루 FTA와 한 칠레 FTA 등 대(對) 중남미 FTA 전략은 우리나라 자동차산업 발전에 시사 하는 바가 매우 크다 할 수 있다. 본 논문은 한 칠레 FTA의 체결 전후의 자동차 수출 영향요인 변화 분석을 통해 중남미 자동차 수출 전망을 예측하고 대응 방안을 모색하는 데 목적이 있다. 연구결과 '환율', 'GDP', '유가' 등 요인 변수 중 'GDP'가 FTA 이전과 이후 모두 수출 성과와 강한 상관관계를 보였으며, 회귀분석에서도 'GDP'만이 수출성과에 영향을 미치며, 특히 FTA 발효 이후 영향력이 더욱 높아진 것으로 나타났다. 이는 중남미 자동차 수출에 FTA 효과도 중요하지만 현지 국의 경제상황과 강력히 연동하고 있다는 점을 시사하고 있어 현지 생산 체제 구축 등 이에 대한 대응 방안 모색이 요구된다.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2007년도 춘계학술대회B
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• pp.1926-1930
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• 2007

In this study, we performed the CFD analysis to predict the cooling performance of the motor for golf-car application. The motor for the golf-car is different from the general motors in the cooling method and the operating condition. So, it is important to predict the motor's temperature generated by the electric losses. We investigated the inner temperature rise using the unsteady state analysis and compared with the experiment for the reliability evaluation of the CFD results through the present study.

• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 2003년도 The 8th Asian Symposium on Precision Forging ASPF
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• pp.127-132
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• 2003

This article mainly introduces the research of closed forging on 20MN hot die forging presses. After transforming of the equipments, optimizing of die design and improving of die-manufacturing precision, gear blanks used in car gearbox have been forged out without fins successfully.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2004년도 추계학술대회 논문집
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• pp.1479-1482
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• 2004

LMTT (Linear Motor-based Transfer Technology) is horizontal transfer system in the maritime container terminal for the port automation. The system is driven by PMLSM (Permanent Magnetic Linear Synchronous Motor) that is consists of stator modules on the rail and shuttle car. This paper investigates the effect of the drop height of container on impact reaction force of the Impact Absorber (IA) in shuttle car for LMTT. The results of this investigation are obtained from detailed finite element analysis for various parameters, such as the spring coefficient, the drop height of container.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2008년도 추계학술대회 논문집 전기기기 및 에너지변환시스템부문
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• pp.65-67
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• 2008

Recently, we are concerned about car energy efficiency because of high Price of oil. Hybrid cars are manufactured and used. Now most cars use BLDC Motor, but these motors generate cogging phenomenon due to its frame. As a result, cars are low efficiency and occur noise and vibration. In this paper, 1KW Double Cylinder Motor which is high efficiency, low noise and vibration by its no slot structure was designed and manufactured for a Hybrid car.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2000년도 전력전자학술대회 논문집
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• pp.548-551
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• 2000

The battery charger for high speed trail car is very important power source for the purpose of safty and system stability. it provides control power of VVVF, CVCF, DC/DC converter and inverter for traction motor. This paper included power circuit of the ZVZCS type battery charger for high speed trail car and battery included power circuit of the ZVZCS type battery charger for high speed trail car and inverter for traction motor. This paper included power circuit of the ZVZCS type battery charger for high speed trail car an battery charging algorithm. Also the optimum parallel operation of 50Kw battery charger for high speed trail car and charging control method of Ni-Cd battery illustrates validity and effectiveness through the experiments.

• 한국기계가공학회지
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• 제6권3호
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• pp.47-52
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• 2007

LMTT (Linear Motor based Transfer Technology), which is a new type transfer system used in the maritime container terminal for the port automation, is driven by PM LSM (Permanent Magnetic Linear Synchronous Motor), and largely consists of a controller, shuttle car, and rail. The shuttle car is divided into the frame part, the driving part, and wheels. Because the shuttle car is supported by four wheels in opposition to have five times length for the width of it, a larger deflection than other transfer system using the linear motor occurs. This deflection changes the gap between the mover and the stator, and then brings on an ununiform thrust force. So in this study, we dealt with the structural design for the mover of the shuttle car to generate the uniform thrust force for the efficient control of it. For the investigation, the thickness for each beam of the mover was adopted as design variables, the weight of the mover as objective function, and stress and deflection of the mover as constraint condition.

• 한국자동차공학회논문집
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• 제7권9호
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• pp.75-81
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• 1999

In this paper, the details of electronically controlled CVT is described , which Kia Motor company recently developed in prototype form for hybrid passenger car. This transmission has two input shafts, one for engine and the other for traction motor. The shaft for traction motor is located at rear side which is extended from primary pulley shaft and connected to traction motor through adapter gear box. Adopting two input system, various driving mode is available such as motor alone driving in hybrid vehicle application. As far as electrohydraulic system concerned , this transmission uses two bleed type variable force solenoids for line pressure and ratio control, and one on-off solenoid for clutch control. Another feature for this transmission is that oil pump for transmission is separate from CVT for supplying oil pressure even at vehicle standstill.