• Journal of East Asia Management
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• 제5권1호
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• pp.75-90
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• 2024

About 100 years after the start of mass production by American car maker Ford in 1913, the automobile industry has come to a major transformation in 100 years. In this transformation period, automakers are facing the biggest challenge of converting power sources, the basis of automobiles, from existing internal combustion engines to electric vehicles. Hybrid vehicles have been released in Japan since the late 1990s, and changes in automobile power sources have occurred early. In order to gain global leadership in hybrid vehicles, Japanese automakers and the Japanese government joined forces to promote the growth of the domestic hybrid vehicle market. The government has implemented a policy to substantially subsidize the high price of hybrid cars compared to internal combustion engine cars by providing purchase subsidies and tax benefits to buyers. Toyota has increased its line-up of hybrid cars around the Prius and has further strengthened communication with customers for the sale of hybrid vehicles. As a result of continuing these efforts for about 20 years, the percentage of Japan's hybrid vehicle market in 2022 reached 51% for passenger cars. Recently, each country has been setting and promoting aggressive goals for electric vehicles that require a wider range of physical and institutional infrastructure than hybrid vehicles. This study aims to assess the growth of electric vehicles by looking at the trend of hybrid vehicles and how they've been distributed in the Japanese market.

• 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.

• 전자공학회논문지
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• 제53권4호
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• pp.27-34
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• 2016

철도 차량은 일렬로 연결되는 구조적 특수성이 있으므로 네트워크 토폴로지를 구성하는 경우에서도 이를 고려하여야 한다. 또한 차량 내의 장치 간 연결에서의 토폴로지와 차량 간 연결에서의 토폴로지를 구분하여야 한다. 차량 간 연결에 있어서 기존의 링, 스타, 데이지체인, 버스 등의 토폴로지 대신 이를 조합한 하이브리드 토폴로지가 제안되었다. 이는 일렬로 연결된 철도 차량을 적절한 수의 그룹으로 묶고 그룹 내에서는 스타 네트워크 토폴로지로 구성하고 그룹 간 연결은 데이지체인 네트워크 토폴로지로 구성하는 방식이다. 이를 통해 하이브리드 토폴로지는 스타 토폴로지에 비해 차량 간 연결에 필요한 케이블의 수를 절감하고도 적절한 전송 속도를 유지할 수 있다. 하이브리드 토폴로지는 스타와 데이지 체인 두 가지 토폴로지를 절충하는 방식이므로 각각의 장점을 잘 활용할 수 있도록 그룹 내 차량의 수를 적절히 선정하는 것이 중요하다. 본 논문에서는 철도차량에서 최적의 하이브리드 네트워크 토폴로지를 구하는 것을 목적으로 한다. 이를 위해 차량 별로 데이터 생성 크기와 생성 주기가 동일하다는 가정 하에 차량 간 연결에서의 최대 케이블 수와 전송 속도에 대하여 각각 가중치를 별도로 두고 가중치 별로 전체 차량 수에 따른 최적의 그룹 내 차량의 수를 도출한다.

• 자원ㆍ환경경제연구
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• 제22권1호
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• pp.3-29
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• 2013

The purpose of this study is to estimate consumer preferences on hybrid cars and electric cars by employing a choice experiment reflecting the various market conditions, such as different projected market shares of green vehicles and $CO_2$ emission regulations. Depending on different market scenarios, we examine as to which attribute and individual characteristic affect the preferences of potential consumers on green vehicles and further, forecast the potential market shares of green cars. The primary results, estimated by a conditional logit and panel probit models, indicate that sales price, fuel cost, maximum speed, emission of air pollutants, fuel economy, and distance between fuel stations can significantly affect consumer's choice of environment-friendly cars. The second finding is that the unique features of electric cars might better appeal to consumers as the market conditions for electric cars are improved. Third, education, age, and gender can significantly affect individual preferences. Finally, as the market conditions become more favorable toward green cars, the forecasted market shares of hybrid and electric vehicles will increase up to 67% and 14%.

• 한국수소및신에너지학회논문집
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• 제30권4호
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• pp.362-368
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• 2019

Electric vehicles contribute greatly to energy conservation, $CO_2$ reduction and energy security through high fuel economy and various electric sources. Electric cars have a huge economic impact. More than 14 million hybrid electric cars have been sold worldwide. More than 3 million plug-in electric vehicles have been sold worldwide. The environmental impact depends greatly on the amount of national power generation, and as the electric grid becomes more and more carbon-intensive, countries are increasingly adopting hybrid and electric vehicles. Electricity is expanding beyond cars. Electric buses, trucks, and ships have similar benefits.

• 미래기술융합논문지
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• 제2권3호
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• pp.17-24
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• 2023

하이브리드 자동차를 연구로 목적으로 논문을 설계합니다. 히이브리드 자동차는 내연 기관과 배터리 엔진을 동시에 장착하여 기존의 일반 차량에 비해 연비와 유해가스 배출량을 획기적으로 줄인 차세대 자동차로 전기모터는 차량 내부에 장착된 고전압 배터리로부터 전원을 공급받고, 배터리는 자동차가 움직일 때 다시 충전되는 시스템을 가진 차를 연구로 기존 자동차의 에너지 손실은 대부분 교통 혼잡에 따른 공회전을 보완해 차량의 속도나 주행 상태 등에 따라 시간과 차량 정지시 발생하는데 하이브리드 시스템은 이 같은 가솔린 또는 디젤 엔진의 단점엔진과 모터 힘을 적절하게 제어함으로써 효율성을 극대화시킨 차라고 할 수 있다. 하이브리드 차는 연비 개선, 환경 친화성, 경제성, 노이즈 감소 등 다양한 장점을 가지고 있어서 점차 많은 사람들에게 선택되고 있는 대안적인 자동차 옵션입니다. 해당 연구를 통해 환경오염을 방지하고 미래 자동차 연구를 위해 노력을 기울일수 있을 것입니다.

• 한국주조공학회지
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• 제38권3호
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• pp.60-65
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• 2018

In the present study, the characteristics of Mg inverter cases for hybrid cars are investigated. Concerns over the use of lightweight materials to reduce energy use and to mitigate emission problems are inevitable in the twenty-first century. Magnesium is a promising material for the manufacturing of lightweight parts. Several cases for thermal cooling channels have been designed and simulated, and the effects of materials and coatings on the thermal cooling efficiency have been discussed. The effects of the coating thickness on heat extraction in an Mg inverter housing case using the PEO (plasma electrolyte oxidation) coating method were also discussed. In order to produce an inverter case by the diecasting process, the filling sequence and cooling behavior during the diecasting process were simulated. The optimized process conditions from the simulation result were then used in a trial diecasting experiment.

• Composites Research
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• 제26권6호
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• pp.386-391
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• 2013

본 연구에서는 차량의 승차감 향상을 위해 기존의 알루미늄 차량용 휠의 성능을 개선하고자 복합재료-알루미늄 하이브리드 휠을 제안하고 시제품을 제작하여 평가하였다. 유한요소해석 기법을 통해 알루미늄과 복합재료의 접착부에 대한 접착 길이와 접착 두께를 결정하고, 자동조심 및 접착 지그 역할을 할 수 있는 홈과 돌기 구조를 적용하였다. 차량용 복합재료-알루미늄 하이브리드 휠의 성능평가를 위해 다양한 실험을 유한요소해석을 통해 구현하고 안전성을 검토하였다. 복합재료 림 부의 성형을 위한 금형을 설계하고 진공백 성형방법으로 제작한 후 알루미늄 부와 접착을 하여 시제품을 완성하였다. 진동실험 결과, 동일한 형상의 알루미늄 휠보다 10% 가벼운 복합재료-알루미늄 하이브리드 휠의 경우 고유진동수가 16% 증가하였고, 감쇠능이 32% 증가하였다.

• Tribology and Lubricants
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• 제38권2호
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• pp.70-72
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• 2022

In this study, we report on a power system developed as a decelerator for a driving module in an electric vehicle. The system is to be mounted in a limited space. The research focus was on development of miniaturization, light weight, and high power density. In particular, we aimed to minimize the layout of existing external components as integrated or built-in, and to maximize the power density by applying optimal cooling technology to increased requirements for developing modular power systems applicable to various OEM models. South Korean automakers ranked fourth in global electric-vehicle sales in 2020, but domestic sales are relatively slow. Despite government's expansion in subsidies for eco-friendly cars, consumers are delaying purchases after 2021 considering the cost-effectiveness of electric vehicles. In major European markets, the demand for electric vehicles exceeded the demand for diesel cars, and sales of hybrid cars, which used to represent eco-friendly cars, are slowing down as Toyota, started selling electric vehicles. In this study, the internal lubrication characteristics of a decelerator installed in an electric vehicle were analyzed in terms of the deceleration time while driving. By selecting the proper oil and oil viscosity, it was confirmed that there is no problem in lubricating the bearings and gears of the decelerator.

• 에너지공학
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• 제24권3호
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• pp.34-39
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• 2015

Recently, Air pollution is gradually increasing which are coming from the exhaust of the ICE vehicles in the world. ICE vehicle exhaust gas and $CO_2$ are widely suspected of contributing to the called greenhouse effect, fueling fears of global warming. Therefore, many countries are striving to decrease the vehicle exhaust gas and have developed a variety of policies as air pollution regulation plans. To comply with the regulations, automotive industry has developed hybrid vehicles, which have features of both ICE vehicles and electric vehicles. Hybrid car is eco-friendly and has lowered exhausting gases and improved fuel efficiency. This research has been written to show that break down cases with EGR valve in hybrid cars, steadily increasing in use, and to help with on-site maintenance.