Abstract
To explore the relationship between fuel consumption and speed for a vehicle on a superhighway with a design speed exceeding 120 km/h, the fuel consumption data provided by the Test of Easy Car platform are used to fit the fuel consumption of different models. The fitting results show that the fitting degree of fuel consumption by a cubic curve is the highest, and the correlation coefficient is above 0.95. A fuel consumption cubic curve model of different vehicle types is established by using the fitting parameters to predict the fuel consumption when a vehicle is running at a speed of 130 km/h–180 km/h. The prediction results show that the average fuel consumption of compact vehicles is the lowest when a vehicle is running on a superhighway at speeds of 130 km/h–180 km/h, with values of 8.95 L/100 km–16.26 L/100 km; the average fuel consumption of sport utility vehicles (SUVs) is the highest, with values of 12.65 L/100 km–22.70 L/100 km. The prediction results can be used to estimate the cost of using a superhighway and provide a basis for estimating the feasibility of superhighways.
Highlights
The 1951 edition of the Highway Engineering Design Guidelines (Draft) first stipulated a maximum design speed for China’s highways of 120 km/h
Through the Test of Easy Car platform, fuel consumption data of 50 models have been obtained in total, which can be broadly divided into several models such as small vehicles, compact vehicles, mid-size vehicles and sport utility vehicles (SUVs); small vehicles: car length less than 4.3 m, wheelbase less than 2.5 m; compact vehicles: car length less than 4.6 m, wheelbase less than 2.7 m; mid-size vehicles: car length less than 4.9 m, wheelbase less than 2.8 m
The fuel consumption data of the other four models were imported into SPSS software for curve fitting, and the highest correlation coefficients of their respective fitting models were obtained for the cubic curve model
Summary
The 1951 edition of the Highway Engineering Design Guidelines (Draft) first stipulated a maximum design speed for China’s highways of 120 km/h. Construction of the first superhighway in China, the Hang-Shao-Yong highway, began in 2018, and it is expected to open in 2022 before the opening of the Asian Games in Hangzhou The completion of this superhighway will be a milestone in the development history of China’s superhighways. There are few studies on the prediction of the fuel consumption of vehicles on a superhighway whose design speed exceeds 120 km/h. This work provides a reference for the fuel consumption prediction of vehicles on superhighways whose speeds exceed 120 km/h. The established fuel consumption prediction model can provide a reference for predicting the consumption of fuel of vehicles on the superhighway with a design speed of over. The difference in such performance is related to vehicle exhaust emissions, which can be used as a reference for studying such emissions in different vehicle models
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