Correlation analysis of road load fuel economy variations by energy difference for gasoline direct injection and diesel-powered vehicles
| العنوان: | Correlation analysis of road load fuel economy variations by energy difference for gasoline direct injection and diesel-powered vehicles |
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| المؤلفون: | Jinyoung Ko, Cha Lee Myung, Jeonghun Son, Charyung Kim, Kangjin Kim, Simsoo Park |
| المصدر: | Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering. 234:897-911 |
| بيانات النشر: | SAGE Publications, 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | 0209 industrial biotechnology, 020209 energy, Mechanical Engineering, Aerospace Engineering, 02 engineering and technology, Tire pressure, Automotive engineering, Diesel fuel, 020901 industrial engineering & automation, Multiple factors, Correlation analysis, 0202 electrical engineering, electronic engineering, information engineering, Environmental science, Gasoline direct injection, Energy (signal processing) |
| الوصف: | Test flexibilities, such as the tire pressure, adjustment of brakes, vehicle preconditioning, test mass, and running-in period, are multiple factors that can confound vehicle emissions and fuel economy tests. The road load force is the most influential flexibility factor for a type-approval vehicle certification test. Because of these various factors, it was revealed that there was a substantial difference between the type-approval emissions and those from a real-driving emissions test. In this study, the test cycle road load energy using the road load coefficients determined by the TA coast-down procedure was the base condition. After calculating the test cycle road load power, the constant term of the road load coefficient was adjusted by the energy loss. The tolerance of the road load in domestic regulation is 15%, so the constant term of the road load coefficient was increased by 5% in the cycle road load energy loss. Then, the road load power and tractive power were calculated from the force and vehicle speed. The vehicle fuel efficiency, under the road load variation conditions, was determined for modern 2.4 L gasoline direct injection and lean NOxtrap-equipped diesel vehicles on a chassis dynamometer. To assess the impact of different road load values on the FE and carbon dioxide emissions, the test cycle was performed over the combined modes of the federal test procedure-75 and the highway fuel economy test. To investigate the road load variations of the vehicle fuel economy in correlation with the energy difference, the statistical approach of the one-way analysis of variance was applied. The results showed that the variations of the road load energy of the tested cycle were closely related in a trade-off relationship with the vehicle fuel economy. |
| تدمد: | 2041-2991 0954-4070 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::e04412dd9c84b2fa67c32607824f57d4 https://doi.org/10.1177/0954407019899516 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........e04412dd9c84b2fa67c32607824f57d4 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 20412991 09544070 |
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