响应曲面法在柴油机配气相位优化中的应用  

Optimization of valve timing for diesel engine based on response surface methodology

作　　者：孙旭[1,2] 何仁[1] SUN Xu;HE Ren(Jiangsu Province Key Laboratory of Automotive Engineering, Zhenjiang, Jiangsu 212013, China;Nantong Shipping College, Nantong, Jiangsu 226010, China)

机构地区：[1]江苏大学江苏省汽车工程重点实验室,江苏镇江212013 [2]南通航运职业技术学院,江苏南通226010

出　　处：《江苏大学学报（自然科学版）》2019年第3期276-281,共6页Journal of Jiangsu University：Natural Science Edition

基　　金：江苏省汽车工程重点实验室开放基金资助项目(QC201106);南通航运职业技术学院重点科技项目(HYKJ2014A01)

摘　　要：使用AVL-BOOST建立某186F柴油机的计算模型,通过计算模型产生响应曲面设计试验点的数据.采用中心复合设计将得到的响应数据建立响应曲面模型,并对响应模型进行方差分析及回归系数显著性检验,确保所建立的三元二次模型的可信度.由响应模型绘制等值线图、响应曲面图.使用Minitab响应优化器求解标定转速处最优的配气相位,并采用优化后的配气凸轮进行柴油机试验验证.结果表明:进气迟闭角对该柴油机标定点的比油耗影响最为明显,排气提前角次之,适当增大进气迟闭角、排气提前角和气门重叠角可以提高柴油机高转速区的充量系数和经济性;当转速超过2 800 r·min^(-1)时,充量系数和比油耗较原机均有不同程度的增大与减小,其中标定点处的比油耗降低了2.12%,充量系数增大了4.88%.The calculation model of sample 186F diesel engine was established by AVL-BOOST software, and the dates were required from the established calculation model by response surface methodology (RSM). The multi-quadratic regression equation was established by the central composite design of experiment, variance analyses and significant tests of regression coefficients to ensure the fitting degree of the predictive model. The optimal valve timing was calculated by the response optimizer in Minitab software, and the verification experiment was conducted by the optimal valve timing. The results show that the intake valve close angle has the most obvious influence on the BSFC at the rated power of engine and with sequenced effect by the exhaust valve open angle. Volumetric efficiency and economy of the engine at high speed can be improved by increasing intake valve close angle, exhaust valve open angle and valve overlap angle properly. Compared with the original engine, the volumetric efficiency is increased with different extents when the engine speed is over 2 800 r·min^-1 , and the increasing rate is 4.88% at the rated power. The BSFC is also decreased with various degrees at different speeds, and it is reduced about 2.12% at the rated power.

关 键 词：柴油机 响应曲面法 配气相位 充量系数 优化 

分 类 号：TK406[动力工程及工程热物理—动力机械及工程]