• Journal of Korean Society of Transportation
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• v.24 no.6 s.92
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• pp.45-54
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• 2006

The Purpose of this Paper is to compare and analyze the operational condition of corporation-owned and owner-driver taxies using tachometer output data. The empirical findings from this study are as follows : First, although corporation-owned taxies have long operating mileage and service driving mileage per vehicle. the service rate of owner-driver taxies were 3.5 percent higher than corporation-owned taxies. Secondly it is found that operation mileage, service driving mileage, and service Income except non-service driving mileage have statistically significant differences between corporation owned and owner-driver taxies. In addition. there was a weak correlation between the income and non-service driving mileage of owner-driver taxies. It is concluded that owner-driver taxies joined the call-taxi association and call-taxi services decreased non-service driving mileage.

• Journal of the Korea Society of Computer and Information
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• v.23 no.3
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• pp.63-70
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• 2018

In this work, we analyze the relationship between the accumulated mileage of hybrid electric vehicle(HEV) and the data provided from vehicle parts. Data were collected while traveling over 70,000 Km in various paths. The data collected in seconds are aggregated for 10 minutes and characterized in terms of centrality, variability, normality, and so on. We examined whether the statistical properties of vehicle parts are different for each cumulative mileage interval of a hybrid car. When the cumulative mileage interval is categorized into =< 30,000, <= 50,000, and >50,000, the statistical properties are classified by the mileage interval as 82.3% accuracy. This indicates that if the data of the vehicle parts is collected by operating the hybrid vehicle for 10 minutes, the cumulative mileage interval of the vehicle can be estimated. This makes it possible to detect the abnormality of the vehicle part relative to the accumulated mileage. It can be used to detect abnormal aging of vehicle parts and to inform maintenance necessity.

• Proceedings of the KSR Conference
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• 2008.11b
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• pp.1463-1472
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• 2008

The present paper to relate with the maintenance of the high-speed vehicle, KTX and is to treat a reliability evaluation. The reliability of the high-speed vehicle while operating between-failure average mileage (MKBSF) and parts between-failure average mileage (MKBF), 1,000,000 per km service failure number of items and availability and per km evaluated a maintenance expense. The reliability evaluation results and 2007 year reliability management indexes compared in 2006 years and they improved, per km the maintenance expense compared at 2006 and 36.6% was decreased. Reliability management activity leads and availability of the high-speed vehicle, safety improves and with the fact that will be able to decrease the maintenance expense which is an economic scale of railroad service is expected.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.20 no.10
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• pp.1987-1993
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• 2016

The core value of the college of Interdisciplinary & Creative Studies is rely on the supporting system which can develop the learners' practical 'performing' competency. For aiming this, educational process of university constitutes the competencies which can be expected at the local field and develop the competency-oriented extracurricular & its operating system. Defining the creative convergent talent, as 'collaborative creative convergent one, bricoleur' and categorizes core competency named as TX competency. T competency contains humanities and the professionals of each major field needed. X competency consists of creative problem solving, convergent thinking ability, self-oriented learning ability and cooperative leadership. Developing extracurriculum & its operating system learners can be exposured the systemic learning and managing process. They can develop their potential abilities and can accumulate a proper mileage at their learning achievement. This research can be expected as a model of competency-based extracurriculum and its operating system which can develop learners' multiple competency overcoming the limit scope of curriculum.

• Transactions of the Korean Society of Automotive Engineers
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• v.24 no.6
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• pp.649-659
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• 2016

This paper describes control algorithm and control structure of vehicle control unit for range-extended electric vehicle equipped with engine-generator system, and specially presents methods which determine optimal operating points and decreases a vibration or a shock for operating the engine-generating system. The vehicle control algorithm is consisted of several parts which are sequence control, calculation of wheel demand torque, determination of operating points, and management of operating points and so vehicle controller has be made possible to efficiently manage calibration parameters. The control algorithm is evaluated by driving test modes, launching performance and operating engine-generator system and so on. In conclusion, this paper present methods for extending a mileage, improving a launching performance and reducing vibration or shock when the engine-generating system is starting or is stopping.

• Journal of Climate Change Research
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• v.7 no.1
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• pp.19-29
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• 2016

In this study, the emission intensity calculation method of GHGs was developed by considering the characteristics of the models and time series. The telematics device was installed on the car (OBD-II) to collect information on the operation conditions from each sample vehicle of public authorities. Based on emission intensity of GHGs, it presented a methodology of quantitative comparison of GHGs emission by vehicles. Collected driving information of vehicle was used for operating characteristics analysis of the target vehicle, and it was confirmed different operating characteristics through comparison of the results and previous study. GHGs emission intensity were analyzed considering characteristics of vehicle type by passenger car, van, cargo, and considering characteristics of the time series by summer, winter, and intermediate. From the analysis result, it was calculated GHGs emission intensity based on mileage ($g\;CO_2\;eq./km$) and operating time ($g\;CO_2\;eq./sec$).

• Transactions of the Korean Society of Automotive Engineers
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• v.25 no.1
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• pp.60-65
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• 2017

We designed and fabricated the engine oil monitoring sensor to measure engine oil deterioration through increased vehicle mileage. Since the condition of the engine oil can be affected by the state of the vehicle and its operating conditions, it should be directly measured and determined in every vehicle. The fabricated sensor has an aluminum parallel capacitor structure that measures capacitance related with the dielectric constant, which is one of the indices of oil deterioration. The size of the capacitor is small enough that it could be easily adapted on the oil level gauge without introducing any change in the design. The fabricated device is installed in the diesel engine to measure the change in capacitance accurately as the vehicle moved from 0 km (new engine oil state) to 11,364 km. The results showed the maximum value at around 5,000 km, and the values plateaued as mileage increased, corresponding with the measurement result of the TAN (Total Acid Number). Based on the results, the condition of the oil must be monitored regularly though oil change is recommended once the vehicle has traveled the distance of around 10,000 km.

• International Journal of Automotive Technology
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• v.8 no.5
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• pp.533-542
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• 2007

The two stroke spark ignition engine is the greatest contributor of the total vehicular pollution in a country like India. It is therefore an item that requires great attention in order to reduce fuel consumption and its concomitant pollution. The use of strong magnetic charge in the fuel line gives a complete and clean burn so that power is increased while operating expenses are reduced. The magnetic flux on the fuel line dramatically reduces harmful exhaust emissions while increasing mileage, thereby saving money and improving engine performance. It increases combustion efficiency and provides higher-octane performance. The experimental results show that the magnetic flux on fuel reduces the carbon monoxide emission up to 13% in a base engine, 23% in a copper-coated engine and 29% in a zirconia-coated engine.

• The Journal of the Convergence on Culture Technology
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• v.6 no.4
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• pp.95-101
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• 2020

This study aims to investigate the current status of the operation system of the curriculum support extra-curricular program, focusing on the extra-curricular program operation system of other universities, and suggest the desirable operation system and performance management plan of the extra-curricular program in cultural education. To this end, the analysis of the extra-curricular program operation system of eight four-year universities in the Seoul metropolitan area was conducted on the existence of core competencies, computer systems and extra curricula program guides, credit-linked and mileage scholarship programs, and the analysis focused on the characteristics, merits and demerits of each university's operating system. It was also intended to propose the desirable operation system and performance management plan of the extra curricula program in liberal arts education, focusing on the operation system of the extra curricula program of E University and the corresponding performance management. Conclusion To operate the extra curricula program efficiently, the computer system and the extra curricula program guide, credit link and mileage scholarship system should be introduced. In addition, the analysis of the operation system of the curriculum support program of E University shows that E University operates systematically with the direction of operation of the core competency-based curriculum support extra-curricular program, and the performance management of the extra curricula program of E University is carried out through the EU-TQM System Integrated Management System.

• Tribology and Lubricants
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• v.34 no.6
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• pp.292-299
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• 2018

The objective of this research is to investigate the impact of engine oil aging on PM(Particulate Matter), exhaust gases, and DPF. It is widely known that the specification of a lubricant and its consumption in an ICE considerably influences the release of regulated harmful emissions under normal engine operating conditions. Considering DPF clogging phenomena associated with lubricant-derived soot/ash components, a simulated aging mode is designed for DPF to facilitate engine dynamometer testing. A PM/ash accumulation cycle is developed by considering real-world engine operating conditions for the increment of engine oil consumption and natural DPF regeneration for ash accumulation. The test duration for DPF aging is approximately 300 h with high- and low-SAPs engine oils. Detailed engine lubricant properties of new and aged oils are analyzed to evaluate the effect of engine oil degradation on vehicle mileage. Furthermore, physical and chemical analyses are performed using X-CT, ICP, and TGA/DSC to quantify the engine oil contribution on the PM composition. This is achieved by sampling with various filters using specially designed PM sampling equipment. Using high SAPs engine oil causes more PM/ash accumulation compared with low SAPs engine oils and this could accelerate fouling of the EGR in the engine, which results in an increase in harmful exhaust gas emissions. These test results on engine lubricants under operating conditions will assist in the establishment of regulated and unregulated toxic emissions policies and lubricant quality standards.