Before revision:  In this paper, we proposed a new method  to evaluate the fuel economy and emission level of the vehicle based on the unsupervised learning of the real-world driving data of the evaluated vehicle and typical driving primitive analysis of the naturalistic driving dataset of a large number of different vehicles .
After revision:  In this paper, we proposed a new method to evaluate the fuel economy and emission level of the vehicle based on the unsupervised learning of the real-world driving data of the evaluated vehicle and the large naturalistic driving dataset of a large number of different vehicles .