The gaseous emitted from vehicles have remarkable effects on human health and environment. In this study, gaseous pollution in the emission of light duty diesel vehicle(LDV), gasoline vehicle(GV), compressed natural gas vehicle (CNGV) and methanol vehicle(MV) were collected on the chassis dynamometer and analyzed in the laboratory. The main results were given as follows: compared with LDV, the CNGV emitted less CO, NO, NMHC and VOCs, while the emission of methane from CNGV was 10 times of that from gasoline car; and NO, NMHC and VOCs emitted from MV were significantly less than that from gasoline, while CO was higher; the formaldehyde concentrations in MV exhaust was 51 times, and the methanol was 5 times of that from GV. From the aforementioned, the concentrations of methane, methanol and formaldehyde were higher in alternative fuel vehicle exhaust, indicating original TWC has little catalytic effect. It implied that special catalyst to methane, methanol and formaldehyde should be researched and developed of CNGV and MV. The results strengthen our understanding on the vehicles powered by various types of fuels.

CICTP