• 제목/요약/키워드: Real-driving emission

검색결과 64건 처리시간 0.069초

국내 소형자동차의 실제 도로 주행 배출가스 특성에 관한 연구 (A Study on the Emission Characteristics of Korean Light-duty Vehicles in Real-road Driving Conditions)

  • 박준홍;이종태;김선문;김정수;안근환
    • 한국자동차공학회논문집
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    • 제21권6호
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    • pp.123-134
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    • 2013
  • Strengthening vehicle emission regulation is one of important policies to improve air quality in urban area. Due to the limitation of specified driving cycles for certification test to reflect real driving conditions, additional off-cycle emission regulations have been adopted in US and being developed in Europe. The driving cycles of US or Europe have been used in emission certification for Korean light-duty vehicles, but it has not been known how well the driving cycles reflect various real driving patterns in Korea. In that point of view, it is required to estimate vehicle emission based on real road driving conditions to raise the effectiveness of vehicle emission regulation in Korea. In this study, real driving emission measurements have been conducted for three Korean light-duty vehicles with PEMS. The driving routes consisted of urban, rural and motorway in Seoul and Incheon. The data have been analyzed with various averaging methods including moving averaging windows method and compared to emission limits set with emission certification modes applied to tested vehicles. The results have shown that the real driving pollutant emissions of a gasoline and a LPG vehicles have been ranged quite lower than those of emission limits on CVS-75 driving cycle. But real driving NOx of a light duty diesel vehicle has been considerably higher than emission limit of NEDC driving cycle. The higher than expected NOx emission of a diesel vehicle might be caused by different strategy to control EGR in real driving condition from NEDC driving.

PEMS를 이용한 소형 경유차의 실주행 NOx 배출특성 평가 (Estimation of Real-Driving NOx Emission Characteristics from Light-Duty Diesel Vehicles with PEMS)

  • 박연재;권상일;박준홍;이재영
    • 한국대기환경학회지
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    • 제31권6호
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    • pp.562-572
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    • 2015
  • $NO_x$ emissions from diesel vehicles have been regarded as a main cause of high $NO_2$ concentration in metropolitan area. Recent studies have shown that the on-road $NO_x$ emissions of diesel vehicles are quite higher than the emission limits specified with the pre-defined test method for emission certification. To reduce air pollutants effectively, the discrepancy of emissions in certification and real-driving conditions should be tackled. In this study, the real-driving emissions have been estimated with portable emission measurement system (PEMS). The results of this study have shown that the on-road $NO_x$ emissions from diesel vehicles have been decreased as the introduction of stricter emission regulation, EURO-6, but additional reduction should be still required and robust technologies should be applied to control $NO_x$ in real-driving conditions. RDE-LDV (Real Driving Emission - Light Duty Vehicles) test method being developed in the European Union can represent excessive on-road $NO_x$ emissions of diesel vehicles as applied emission technologies and can be a solution to remove discrepant $NO_x$ emissions between certification and Korean real-driving conditions. Among the $NO_x$ reduction technologies for EURO-6 diesel vehicles, selective catalytic reduction (SCR) system has shown the better performance than lean $NO_x$ trap (LNT) system to control on-road $NO_x$ emissions. Implementing RDE-LDV will require vehicle manufacturers to adopt the more effective $NO_x$ reduction technology in real driving conditions.

실 도로 주행 특성에 대한 연구 (A Study on Urban Driving Pattern)

  • 한상명;김창현
    • 한국자동차공학회논문집
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    • 제10권5호
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    • pp.9-14
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    • 2002
  • The durability prediction of emission control components, especially 02 sensor and catalytic converter, is getting more important as emission regulation is getting stricter and vehicle durability mileage requirement is also extended from 80,000 ㎞ to 160,000 km in Korean market. And the duration of vehicle mileage accumulation to get vehicle exhaust emission deterioration factor for certification is required to be shorter in order to reduce the vehicle development time. Since most of the vehicle emission development tests are done on chassis dynamometer and aging bench by using vehicle aging modes, real road condition and in-use driving patterns must be reflected into them to predict the vehicle emission level and to meet emission regulation especially at high mileage. In order to get the frequent driving pattern of vehicle and the aging characteristic of emission components, a vehicle was tested by changing drivers and driving roads around Seoul. Real road driving patterns were analyzed and compared with those of the certification modes which are well known in automotive industry.

승용 경유 차량의 실제도로 주행 배출가스 시험에서 주행 경로와 운전 성향이 질소산화물에 미치는 영향 (Impact of Test routes and Driving style on NOx emissions of Light-Duty Diesel Vehicle over Real Driving Emissions test)

  • 유영수;정준우;전문수;차준표
    • 한국분무공학회지
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    • 제24권2호
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    • pp.73-81
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    • 2019
  • It is expected that the introduction of real-driving emission will strengthen the exhaust emission. However, various researches have been reported that real-driving emission has been influenced by factors such as characteristics of the test routes and driving characteristics for drivers. In order to reflect this effect, European Commission applied the concept of driving dynamics to prevent deliberately driving of excessive and acceleration over RDE test. The purpose of this study is to analyze the characteristics of exhaust emissions according to real-driving test in three test routes and driving style. As a result of the test, it was confirmed that when the same driver tested real-driving test under three test routes, it depends on the driving characteristics of the route. Also, RDE-NOx for driving style was that severe driving has been about 16 times higher than normal driving in KNUT route.

CVS-75 모드 시험과 실도로 주행 시험을 통한 배출가스 및 연비 성능 평가 (Fuel Economy and Emission Characteristics Evaluation by CVS-75 Mode Test and RDE(Real-road Driving Emissions) Test)

  • 강은정;엄준식;서영호
    • 융복합기술연구소 논문집
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    • 제4권2호
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    • pp.67-70
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    • 2014
  • Recently EU has been recognized that there is a difference of emission quantity between emission certification test mode and real-road driving test. Accordingly the European Commission is currently preparing to require real-road testing as part of the passenger car type-approval process in the EU. vehicle manufacturers from 2017 are expected to test new vehicles not only under laboratory conditions but also on the real-road, using PEMS equipment. Therefore the purpose of this study is to analyze the emission and Fuel Economy of CVS-75 mode test using chassis dynamometer and RDE test using PEMS equipment by PHEV passenger car.

실도로 주행을 반영한 자동차 온실가스 배출 특성 연구 (The Study on Characteristic of Vehicle Greenhouse Gas Emission Applying Real Road Driving)

  • 이정기;용기중;김자륭;엄성복
    • 자동차안전학회지
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    • 제10권3호
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    • pp.45-54
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    • 2018
  • Greenhouse gas is the big issue of the whole world. So foreign countries, EU, USA, Japan, China and Korea made the policy for reducing greenhouse gas. For calculation of reduction, it is necessary to know the quantity of current greenhouse emission per year in Korea. It is not reflected real driving condition for measuring the Fuel economy and greenhouse gas. The subject of this study is to figure out the characteristics which influence on greenhouse gas in real driving condition. And final goal is applying the policy greenhouse emission reduction.

임의주행 사이클을 이용한 실제도로 주행 배출가스 특성 모사에 관한 연구 (A Study on the Characteristics of Simulated Real Driving Emissions by Using Random Driving Cycle)

  • 권석주;권상일;김형준;서영호;박성욱;전문수
    • 한국자동차공학회논문집
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    • 제24권4호
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    • pp.454-462
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    • 2016
  • This study was conducted in order to estimate the exhaust emissions analysis method of the real driving emission(RDE). The Association for Emissions Control by Catalyst(AECC) has developed a test procedure by using a random cycle method based on the chassis dynamometer. In order to confirm this approach in Korea, Euro 5(DPF), Euro 6(DPF + LNT), and Euro 6(DPF + SCR) were performed on three different vehicles to determine the exhaust gas characteristics of the random cycle, real-road driving test(PEMS), and emission certification driving mode(NEDC). Six different random cycle driving modes were generated by the vehicle specifications(e.g. curb weight, engine power, gear ratio, and maximum acceleration). The NOx emissions were increased in the NEDC, random cycle, and PEMS order in this study regardless of the test vehicles. The random cycle method has the advantage because it utilizes a chassis dynamometer in the laboratories for a repeatable data collection, and it allows any eminent emission improvement checked prior to a real-road driving test with PEMS.

실도로 주행에서 PEMS를 이용한 소형 경유 상용차의 가스 상 유해대기오염물질 배출계수 연구 (Emission Factor of Hazardous Air Pollutants in Gas-phase from Light Commersial Vehicle using PEMS on Real-road Driving)

  • 임지혜;한상우;김정;장영기;전문수;황성철;김정화;정성운;김정수;한진석
    • 한국대기환경학회지
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    • 제34권2호
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    • pp.191-206
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    • 2018
  • In this study, the HAPs(Harzard Air Pollutants) emission factor level of Starex and Grand Carnival was tested using PEMS (Portable Emissions Measurement System) on real road driving. As a result of RDE (Real Driving Emission test), the overall vehicle speed pattern showed similar characteristics. The real-road driving test at constant speed revealed emission factor is inversely proportional relationship to constant speed. Results of accelerating with speed limit on the real-road were shown as followings; Uran (less than 45 km/h)>Rural (<45 km/h, less than 80 km/h)>Motorway (>80 km/h). Moreover, the sudden acceleration and deceleration in driving at high speed was the increasing factor to the HAPs emission factor. This tendency is considered to be influenced by the operating environment on real roads.

주행경로에 따른 국내 소형자동차 실제도로 주행 질소산화물 배출량 특성 (Characteristics of Real-road Driving NOx Emissions from Korean Light-duty Vehicles regarding Driving Routes)

  • 옥선일;엄명도;이종태;박준홍;김지철;전문수
    • 한국자동차공학회논문집
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    • 제23권1호
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    • pp.130-138
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    • 2015
  • Despite of recently strengthened vehicle emission regulations, NOx emissions are not decreased in urban areas because of discrepancies between certification emission test modes and real driving conditions. Thus, researches on RDE-LDV (Real-driving Emission-Light-duty Vehicle) have been conducted actively using PEMS (Portable Emissions Measurement Systems). In the present study, NOx emissions were measured for 5 Korean light duty vehicles for real driving conditions including city, combined, highway, and up-downhill test route. Emission characteristics were analyzed for averaged NOx emissions per unit driving distance of each driving test routes. Furthermore, MAW (Moving Average Window) method based on $CO_2$ emissions from WLTC, which will be supported for EU regulations, was utilized. It was revealed that DRs (deviation ratios) for diesel vehicles (i.e., 5.1 ~ 8.4) were greater than gasoline vehicles (less than 0.15). Especially DR of diesel vehicle for up-downhill test route was 8.4, which indicates severe NOx emissions.

가솔린 하이브리드 차량의 실도로 배기규제 평가를 위한 구간 주행 속도 특성 분석 및 해석 모델 개발 연구 (Modeling and Analysis of the Speed Profiles for the Gasoline Hybrid Vehicle in the Real Driving Emission Test)

  • 김성수;이민호;노경하;김정환
    • 한국분무공학회지
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    • 제28권4호
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    • pp.184-190
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    • 2023
  • The European Union has instituted a new emission standard protocol that necessitates real-time measurements from vehicles on actual roads. The adequate development of routes for real driving emissions (RDE) mandates substantial resources, encompassing both vehicles and a portable emission measurement system (PEMS). In this study, a simulation tool was utilized to predict the vehicle speed traversing the routes developed for the RDE measurements. Initially, the vehicle powertrain system was modeled for both a gasoline hybrid vehicle and a gasoline engine-only vehicle. Subsequently, the speed profile for the specified vehicle was constructed based on the RDE route developed for the EURO-6 standard. Finally, the predicted vehicle speed profiles for highway and urban routes were assessed utilizing the actual driving data. The driving model predicted more consistency in the vehicle speed at each driving section. Meanwhile, the human driver tended to accelerate further, and then decelerate in each section, instead of cruising at a predicted section speed.