重型柴油机代表性瞬态循环的开发及排放特性研究
Research on development and emission characteristics of representative transient cycle of heavy-duty diesel engine
针对因WHTC 工况难以准确的反映重型柴油机真实道路的运行情况，从而导致实验室的排放认证结果与实际行驶排放间出现显著差异的问题，提出了一种两步法的代表性瞬态循环开发流程，首先建立了重型柴油车实际驾驶循环HRDC，并据此开发了重型柴油机实际瞬态循环HRTC。试验结果表明，相较于WHTC，运行在HRTC的重型柴油机NOx，碳烟与PN 比排放分别增大了36.69%，4.57%和76.28%，WHTC 显著的低估了真实道路的排放程度；HRTC 瞬态碳烟排放相较稳态插值增加了155.74%，以怠速或倒拖工况为起始，扭矩增幅大于40%/s 的突加扭矩过程是造成瞬态碳烟排放恶化的主要场景。
Aiming at the problem that the WHTC condition is difficult to accurately reflect the real road operation of heavy-duty diesel engines, which leads to a significant difference between the laboratory emission certification results and the actual driving emissions, a two-step representative transient cycle development process was proposed. Firstly, the actual driving cycle HRDC of heavy-duty diesel vehicle was established, and the actual transient cycle HRTC of heavy-duty diesel engine was developed accordingly. The test results showed that compared with WHTC, the NOx, soot and PN emissions of heavy-duty diesel engines running at HRTC increased by 36.69%, 4.57% and 76.28%, respectively. WHTC significantly underestimates the emission level of real roads. The transient soot emission of HRTC increased by 155.74% compared with the steady-state interpolation. Starting with idle or reverse drag conditions, and the sudden torque process with a torque increase of more than 40 %/s is the main scenario that causes deterioration of transient soot emission.
刘庚非;徐怀民;曾鹏霏;邬斌扬;苏万华;
天津大学 内燃机燃烧学国家重点实验室，天津 300072;天津大学 内燃机燃烧学国家重点实验室，天津 300072;天津大学 内燃机燃烧学国家重点实验室，天津 300072;天津大学 内燃机燃烧学国家重点实验室，天津 300072;天津大学 内燃机燃烧学国家重点实验室，天津 300072;
TK423.2
heavy-duty diesel engine realistic road driving cycle representative transient cycle transient emission
1-14 / 14
评论