| 초록 |
Brake dynamometer and particle sampling lines were designed and constructed in order to accurately measure the non-exhaust particulate matter(PM) generated by brake wear. The inertia of momentum of the brake dynamometer was designed to represent a vehicle with 1,789 kg mass and 16-inch wheels. Sampling inlet and line were designed considering the isokinetic sampling, which could minimize the particle transportation loss. Regulatory test driving cycles, such as WLTC, NEDC, and FTP-75, were selected. FADE driving cycle, which allows the brake disk and pad reach to reach the critical temperature, was also tested. PM10 emission factors were ranged with 0.56-1.52 mg/km and 0.49-1.89 mg/km per brake when it was measured by APS and DustTrak, respectively. Meanwhile, PM2.5 emission factors were ranged with 0.36-1.01 mg/km and 0.32-1.24 mg/km per brake for APS and DustTrak, respectively. Significant amounts of ultrafine particles(UFPs) were observed only in the FADE driving cycle. |
