[1]谭旭光,等.高效清洁高可靠重型柴油机开发关键技术研究[J].内燃机学报,2020,(05):385-391.[doi:10.16236/j.cnki.nrjxb.202005050]
　Tan Xuguang,Wang Tianyou,et al.Key Technology Development for Efficient-Clean-Reliable Heavy-Duty Diesel Engine[J].,2020,(05):385-391.[doi:10.16236/j.cnki.nrjxb.202005050]
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高效清洁高可靠重型柴油机开发关键技术研究
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《内燃机学报》[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2020年05
页码:
385-391
栏目:
出版日期:
2020-09-25

文章信息/Info

Title:
Key Technology Development for Efficient-Clean-Reliable Heavy-Duty Diesel Engine
作者:
谭旭光1;  2; 王天友3; 李志杰1;  2; 李 卫1;  2; 田红霞1;  2; 孙 凯3
(1. 内燃机可靠性国家重点实验室，山东 潍坊 261061；2. 潍柴动力股份有限公司，山东 潍坊 261061；3. 天津大学 内燃机燃烧学国家重点实验室，天津 300072)
Author(s):
Tan Xuguang1;  2; Wang Tianyou3; Li Zhijie1;  2; Li Wei1;  2; Tian Hongxia1;  2; Sun Kai3
(1. State Key Laboratory of Engine Reliability，Weifang 261061，China；2. Weichai Power Company Limited，Weifang 261061，China；3. State Key Laboratory of Engines，Tianjin University，Tianjin 300072，China)
关键词:
重型柴油机; 燃烧系统; 排放控制; 可靠性
Keywords:
heavy-duty diesel engine; combustion system; emission control; reliability
分类号:
TK427
DOI:
10.16236/j.cnki.nrjxb.202005050
文献标志码:
A
摘要:
针对重型柴油机高效率、高清洁和高可靠性的多目标需求，从燃烧系统、排放后处理系统和关键摩擦副等三个关键环节入手，从系统层面提出了设计参数优化与控制参数优化相结合的全局协同优化思路，通过计算流体动力学(CFD)仿真、虚拟标定和试验优化的全流程有机衔接，有效解决了多项新技术在目标机型上的快速集成问题．研究表明：通过综合采用米勒循环、两级增压、大流量俯冲组合气道与分段卷吸燃烧室相结合的燃烧技术，以及基于优化混合结构的选择性催化还原(SCR)、气门坐圈减磨、活塞环岸优化设计和缸套分区润滑等多项技术及其协同优化，所开发的重型柴油机在整机排放达到国Ⅵb 标准的条件下，最低燃油消耗率低至174.8 g/(kW?h)，气门间隙调整周期突破5 000 h，缸套磨损寿命延长25%，整机倒拖摩擦功耗下降5%．
Abstract:
Abstract：Based on multi-objective requirements of high efficiency，low emissions and high reliability of heavy-duty diesel engines，a system-level optimization of design parameters and control parameters was conducted mainly focused on combustion system，exhaust after-treatment system and friction reduction of key moving parts. By using comprehensive optimization methods including computational fluid dynamics(CFD) simulation，virtual calibration and engine design of experiment(DOE) test，several new technologies were rapidly integrated into the engine and effectively matched each other to realize the multi-objective requirements. Experimental results show that the heavy-duty diesel engine achieves China Ⅵb emission standard through the combining use and comprehensive optimization of Miller cycle，two-stage turbocharger，high-flow-coefficient direct intake ports，stepped-lip reentrant combustion chamber，as well as efficient selective catalytic reduction(SCR) mixer，valve seat wear reduction，piston ring optimization design and partition lubrication of the cylinder liner. In addition，the best fuel consumption rate reaches to 174.8 g/(kW·h)，the valve clearance adjustment cycle extends over 5 000 hours，the wear life of cylinder liner is prolonged by 25% and the friction work loss is reduced by 5%.

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更新日期/Last Update: 2020-09-25