摘要
乘用车的NVH性能是整车性能中最关键的性能之一,直接影响驾驶员和乘客对整车品质的主观感受。为进一步提升柴油乘用车的NVH性能,以长城某款2.0 L欧四电控柴油发动机乘用车为对象,对怠速工况下不同节气门开度时的整车NVH性能进行了试验研究。试验表明:随着节气门开度的减小,整车NVH性能明显提高;但要合理掌握节气门关闭位置,确保不使空燃比过小,以避免燃烧不稳定、冒黑烟的现象。
Passenger vehicles＇＂ NVH performance is one of the most important performance of vehicles, which directly influences drivers＇and passengers＇subjective feelings about vehicles＇quality. To further improve the NVH performance of diesel passenger vehicles, a Great Wall passenger vehicle with 2.0 L Euro IV electronic controlled diesel engine was taken as the research object to study the whole vehicle＇s NVH performance with varied throttle opening under idling condition. The experimental results show that the whole vehicle＇s NVH performance improves with the decrease of throttle opening. However, the close position of throttle should be rationally managed to prevent the air-fuel ratio from getting too small, thus could avoid unstable combustion and black smoke phenomenon.
出处
《柴油机》
2017年第2期20-23,共4页
Diesel Engine
关键词
乘用车
NVH性能
节气门
试验
passenger vehicle
NVH performance
throttle
experiment
