Research of in-vehicle odor sources based on field measurement and odor evaluation

 In order to explore the main sources of in-vehicle odor and clarify the optimization goal of such issue, pollutant concentration levels in a commonly used domestic vehicle brand are tested under actual use environmental conditions, and a total of 124 key volatile organic compounds (VOCs) concentration levels in 27 vehicles are obtained. The results show that alkylenes, benzenes, aldehydes, ketones and alcohols play a significant role, accounting for 85% of the total number of VOCs detected. At the same time, interior odor intensity in these measured vehicles is judged by the sniffing person. Based on the correlation between concentration and odor, a total of 22 types of VOCs that may lead to in-vehicle odor are determined. This study provides a possible method to solve the problem of in-vehicle odor and is of great significance for further design and manufacture of vehicles, standard-setting and pollution control strategies.