Characteristics of particulate matter emissions from an in-used China-Ⅳ diesel bus under CCBC(PDF)
长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]
- Issue:
- 2017年01期
- Page:
- 112-119
- Research Field:
- 汽车与机械工程
- Publishing date:
Info
- Title:
- Characteristics of particulate matter emissions from an in-used China-Ⅳ diesel bus under CCBC
- Author(s):
- HU Zhi-yuan; MO Wen-hao; QIN Yan; TAN Pi-qiang; LOU Di-ming
- School of Automotive Studies, Tongji University, Shanghai 201804, China
- Keywords:
- automobile engineering; in-used China-Ⅳ diesel bus; CCBC; particulate matter; characteristic
- PACS:
- U467.1; X513
- DOI:
- -
- Abstract:
-
13An experimental study was conducted in an in-used China-Ⅳ diesel bus on heavyduty chassis dynamometer under CCBC (Chinese typical city bus driving cycle short for CCBC), laboratory driving cycle, and then the quantity and quality characteristics of PM0.1(particulate matter, d≤100 nm, d represents diameter), PM0.1~2.5 (particulate matter, 100 nm＜d≤2.5 μm), PM2.5~10(particulate matter, 2.5 μm＜d≤10 μm) emissions under CCBC were studied. The results show that the bus working condition under CCBC driving cycle is mainly located in 600~1 338 r/min for engine speed range and 0～400 N·m for torque range, which shows low speed and low torque are the main characteristics of the country. Particulate matter quantity emission factors of PM0.1, PM0.1~2.5 and PM2.5~10 under CCBC are respectively (1.21±0.07)×1013, (2.82±0.3)×1012, and (1.66±0.07)×109 per kilometer. 81.2% inhalable particulate matter quantity emission factor of PM10 is contributed to ultrafine particulate whose d≤0.1 μm. Besides, the quantity emission of PM0.1 in all working conditions accounts for over 70% that of PM10. Particulate matter quality emission factors of PM0.1,PM0.1~2.5 and PM2.5~10 under CCBC are respectively (0.71±0.05), (20.24±1.51), and (105.50±4.49) mg/km. 83.4% inhalable particulate matter quality emission factor of PM10 is contributed to fine particulate whose d>2.5 μm. Quality emissions of PM0.1~2.5 and PM2.5~10take about 90% proportion of quality emission of PM10 under all CCBC working conditions. Ultrafine particulate PM0.1 quantity and quality emission proportion increase with the increasing of vehicle speed during both the transition from idle to start and acceleration working condition. The maximum quantity proportion could reach 94.8% while maximum quality proportion could reach 13.0%. Quality emission of PM2.5~10 is almost 0-level during the transition from acceleration to uniform speed then to deceleration. During deceleration working condition, quantity and quality emission of particulate matter decrease sharply and quality emission of inhalable particulate matter are mainly composed of PM2.5~10 emission. Among all idling, acceleration, uniform speed and deceleration working conditions under CCBC cycle, quantity and quality emission proportion of PM0.1,PM0.1~2.5 , PM2.5~10 during acceleration working condition are highest, which all exceeds 60% of quantity and quality emission in all working conditions.
Last Update: 2017-01-22