A total of 1.35 million effective realtime working and emission data within 38 days for diesel sanitation vehicle with solid SCR system were acquired by using the realtime monitoring platform of automobile exhaust gas. The results show that diesel vehicle runs at an average speed of 13.45 km/h and 90% of acceleration points fluctuates within ±1.5 m/s2.The average mass concentration of NOx is 0.023 g/s and its average emission factor is 4.17 g/km. The NOx conversion rate increases with the increase of vehicle velocity and increases and then becomes stable with the increase of exhaust temperature. When the average exhaust temperature is lower than 150 ℃，the average conversion rate of NOx is 61%. Accordingly, the solid SCR system can greatly reduce NOx emissions of diesel vehicles at low exhaust temperature.
LIU Ming
,
HE Chao
,
LI Jiaqiang
,
LIU Xueyuan
,
PENG Qikai
,
ZOU Lang
. Solid SCR System Operation and NOx Emission Characteristics of Diesel Vehicle[J]. Vehicle Engine, 2019
, 0(1)
: 53
-57
.
DOI: 10.3969/j.issn.1001-2222.2019.01.009
