Progresses in application of onboard refueling vapor recovery (ORVR) system

Volatile organic compounds (VOCs) generated during storage and distribution of light oil products can not only reduce quality of oil products, but also induce economic losses. In addition, these compounds may cause severe environmental pollution. Most of domestic gas stations adopted station-based vapor recovery techniques. This paper briefly reviewed the development history and evolution of relevant policies for onboard refueling vapor recovery (ORVR) system in the United States. In addition to reviewing efficiencies and operational principles of the ORVR system, problems related to compatibility with Stage Ⅱ during application and relevant solutions have been studied. Furthermore, impacts of the system on cost estimation in vehicle refitting and other key factors that may affect promotion of the ORVR system have been analyzed. Relevant research results may promote application of the ORVR system in China.