张勇,陈泯旭,王晓勇,等.汽油机动力性能试验设计与多目标优化研究[J].内燃机工程,2022,43(6):84-90.
汽油机动力性能试验设计与多目标优化研究
Research on Test Design of Dynamic Performance and Multi-Objective Optimization of Gasoline Engines
DOI：10.13949/j.cnki.nrjgc.2022.06.011
关键词:汽油机  计算流体动力学  试验设计  遗传算法  多目标优化
Key Words:gasoline engine  computational fluid dynamics  design of experiment （DOE）  genetic algorithm  multi-objective optimization
基金项目:重庆市自然科学基金面上项目（cstc2021jcyj-msxmX0440）
作者单位E-mail
张勇* 重庆理工大学 车辆工程学院，重庆 400054
重庆理工大学 汽车零部件先进制造技术教育部重点实验室，重庆 400054 		zhangyong@cqut.edu.cn 
陈泯旭 重庆理工大学 车辆工程学院，重庆 400054
重庆理工大学 汽车零部件先进制造技术教育部重点实验室，重庆 400054 		 
王晓勇 重庆理工大学 车辆工程学院，重庆 400054
重庆理工大学 汽车零部件先进制造技术教育部重点实验室，重庆 400054 		 
高勇 重庆理工大学 车辆工程学院，重庆 400054
重庆理工大学 汽车零部件先进制造技术教育部重点实验室，重庆 400054 		 
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摘要:针对某高速汽油机中低转速工况下动力性能较差的实际问题，分别建立发动机一维模型和三维模型，计算分析导致汽油机在中低转速工况下动力性能差的原因并确定优化参数。在此基础上利用试验设计方法（design of experiment， DOE）分析了多影响因素共同作用对发动机动力性能的影响，随后采用遗传算法对原发动机动力性能进行多目标优化。优化结果显示汽油机在目标转速工况下的转矩和功率都有10%以上的提升，在中低转速工况下的动力性能得到较大提升。最后根据优化结果试制样机并进行台架试验，结果显示在5 000 r/min转速工况下，样机的转矩和功率分别提升29.7%和28.1%，样机相较于原机在中低转速工况下动力性能有较大提升，解决了原发动机在中低转速工况下动力性能较差的实际工程问题。
Abstract:In order to solve the actual problem of poor power performance of a high-speed gasoline engine at low and medium speed conditions， the one-dimensional model and the three-dimensional model were established. The power performance of the high-speed gasoline engine at low and medium speed conditions was calculated and analyzed， and the optimized parameters were determined. On this basis， design of experiment（DOE） method was used to analyze the multiple factors’ influence on engine power performance. The genetic algorithm was used to optimize the power performance of the original engine. The calculation results showed that the torque and power of the gasoline engine were improved by more than 10% at the target speed condition， and the power performance was greatly improved at the medium and low speed conditions. At last the prototype test was done based on the calculation results. The test results showed that the torque and power increased by 29.7% and 28.1% respectively at 5 000 r/min speed condition. Compared with the original prototype machine， the power performance at low-speed condition has largely improved， and the problem of the poor power performance of original engine at low-speed conditions has been solved.
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