基于光纤测试的汽油机爆震预防和位置验证  

Knocking Prevention and Knocking Position Validation of Gasoline Engine by Optical Fiber

作　　者：周磊 刘丽华 史程中 田志松 张育春 周武明 Zhou Lei;Liu Lihua;Shi Chengzhong;Tian Zhisong;Zhang Yuchun;Zhou Wuming(Ningbo Geely Royal Engine Components Company Limited,Ningbo 315336,China;Zhejiang Geely Powertrain Components Company Limited,Ningbo 315336,China)

机构地区：[1]宁波吉利罗佑发动机零部件有限公司,浙江宁波315336 [2]浙江吉利动力总成有限公司,浙江宁波315336

出　　处：《内燃机学报》2023年第1期52-60,共9页Transactions of Csice

摘　　要：为了验证快速燃烧技术抗爆措施在汽油机上的综合效果,以及获取燃烧系统进一步优化的方向,利用光纤测试技术和传统测试手段,通过统计分析,在增压直喷汽油机上进行爆震测试、爆震位置识别以及爆震强度与爆震位置相关性研究.结果表明:刻意提前点火角诱发爆震可获得发动机的抗爆潜力,通过外特性进/排气侧爆震特征分析和缸间爆震特征对比,发现在研发动机的爆震位置以进气侧为主.在爆震强度最高的循环和爆震峰值(KPPK)排名前5的循环中,进气侧发生高强度爆震的概率高达69.7%和64.5%,该结果与爆震仿真趋势预测结果相一致,此方法可预测爆震和验证爆震位置,为发动机性能的进一步升级提供方向.In order to verify the effect of anti-knock design for a fast combustion system,which is being developed on a turbocharged direct injection gasoline engine,and to obtain the direction of further optimization of the combustion system,the knocking characteristics including the knocking position and its correlation with the knocking strength were studied using optical fiber system measurement and statistical analysis. The result shows that the antiknock potential investigation can be conducted by deliberately advancing the ignition time. The knocking position of the engine is found to be mainly located on the intake side after careful analyses of knocking simulation results and knocking test results at high loads. Furthermore,knocking position of the maximum knock pressure peak(KPPK)cycle and top five KPPK cycles are also located on the intake side with a probability of 69.7% and 64.5%,respectively. This result is consistent with the trend prediction results of the knock simulation. It is indicated that the combination method of knocking simulation and knocking validation is feasible. And it is beneficial to guide further development in engine performances.

关 键 词：汽油机 光纤测试 爆震位置 爆震预防 爆震验证 

分 类 号：TK412[动力工程及工程热物理—动力机械及工程]