船用微引燃双燃料发动机燃料模式切换  

Experimental research of fuel mode switch-over for a marine micro-pilot-ignition dual-fuel engine

作　　者：郑先全 杨建国[1,2] 黄禄丰 朱树林 钱正彦 ZHENG Xianquan;YANG Jianguo;HUANG Lufeng;ZHU Shulin;QIAN Zhengyan(School of Energy and Power Engineering, Wuhan University of Technology, Wuhan 430063, China;National Engineering Laboratory for Power System of Marine and Ocean Engineering, Electronic Control Sub-laboratory for Low-speed Engine, Wuhan 430063, China;Anqing China State Shipbuilding Corporation Diesel Engine Industry Company Limited, Anqing 246003, China)

机构地区：[1]武汉理工大学能源与动力工程学院,湖北武汉430063 [2]船舶与海洋工程动力系统国家工程实验室低速机电控分实验室,湖北武汉430063 [3]安庆中船柴油机有限公司,安徽安庆246003

出　　处：《哈尔滨工程大学学报》2021年第4期541-547,共7页Journal of Harbin Engineering University

基　　金：工信部高技术船舶科研计划(工信部联装[2013]412).

摘　　要：针对船用微引燃双燃料发动机燃料模式切换过程燃烧不稳定和转速波动大的问题,本文采用台架试验的方法,揭示了发动机不同燃料替代率时燃烧特征与性能,制定并验证了燃气喷射三段控制的燃料模式切换控制策略,分析了燃烧波动及切换时长等因素对燃料模式切换过程的影响。结果表明:随替代率升高,发动机各缸燃烧循环变动增大和一致性变差,至燃气模式有所减弱,但仍高于柴油模式的循环变动和一致性;较短的切换时长将导致切换过程的转速波动增大;采用燃料模式切换控制策略,可实现双燃料发动机20%~80%额定负荷内120 s时间内燃料模式平稳安全切换,转速波动率最大为5.7%,未发生爆震和失火等非正常现象。Unstable combustion and large speed fluctuations generally occur during the fuel mode switch-over process of a marine micro-pilot-ignition dual-fuel engine.The bench tests of the fuel mode switch-over were conducted on a marine dual-fuel engine to reveal the in-cylinder combustion characteristics and performance at various fuel substitution rates.The three-stage controlled fuel supply strategy for the fuel mode switch-over process was developed and verified,and the effects of combustion fluctuations and switch-over duration on the switch-over process were analyzed.The experimental results show that the cyclic combustion variation of each cylinder increases and the consistency deteriorates;as the substitution rate increases,they decrease in the gas mode,although they are still higher than those in the diesel mode.The engine speed fluctuations increase with shorter switch-over durations.The engine was tested for a stable switch-over in 120 s and safely within 20%~80%of the rated load with the maximum speed fluctuation of about 5.7%by using the fuel mode switch-over fuel supply strategy,and no knocking or misfiring occurred during the switch-over process.

关 键 词：船用双燃料发动机 微引燃 燃料模式切换 替代率 燃烧 控制策略 循环波动 转速控制 

分 类 号：TK437[动力工程及工程热物理—动力机械及工程]