基于VSP与基于LN(TAD)的道路油耗微观模型比较

Comparison of Microscopic On-road Fuel Consumption Model Based on VSP and Ln(TAD)

在道路微观油耗模型中,基于功率需求类的参数因其与油耗之间的高度相关性,常被用来描述车辆运行特征。VSP(Vehicle Specific Power)和Ln(TAD)(Natural Logarithm of the Total Absolute Difference of Vehicle Instantaneous Speed)都是常用的基于功率需求类的参数,有必要对基于VSP和Ln(TAD)的微观油耗模型的准确性和特征进行对比。利用收集到的实际逐秒速度数据和油耗数据,分别建立基于VSP和Ln(TAD)的轻型车微观油耗模型,以及平均行程速度与VSP和Ln(TAD)的分布模型,,并将利用模型得到的油耗量和油耗因子测算值与实际值进行比较,归纳出这2种微观油耗模型的特征和规律。

In microscopic on-road fuel consumption models, the power demand-based parameter was commonly used to characterize the vehicle activities because of its strong correlation with fuel consumption. Both VSP and the natural logarithm of Ln(TAD) were commonly used power demand-based parameters. It is necessary to compare the accuracy and characteristic of two fuel consumption models that are developed based on the VSP with Ln(TAD). By collecting and processing field vehicle activities and fuel consumption data, two fuel consumption models for LDVs, one based on the VSP and another one based on Ln(TAD) were developed. Then, the distribution model between the VSP distribution and Ln(TAD) and the average travel speed was constructed. Subsequently, prediction accuracies based on the developed models were compared. The characteristics and regularities of microscopic fuel consumption models based on the VSP and Ln(TAD) for LDVs on urban roads were summarized for the measurements of vehicle fuel consumption.