摘要
针对4190船用中速柴油机,提出由电控组合泵替代传统机械泵,利用AMESim软件建立电控组合泵燃油喷射系统模型,确定试验用凸轮型线、喷孔直径、油泵柱塞直径、高压油管长度等参数。通过发动机台架试验研究凸轮工作段位置、喷油器伸出高度、喷孔直径及供油提前角对柴油机经济性和排放的影响。研究结果表明:凸轮工段位置影响喷油规律,从而影响经济性和排放;喷油器伸出高度减小会导致经济性变差;喷孔直径越小,最低燃油耗的供油提前角越大;减小喷孔直径,燃油喷射压力提高,有利于降低燃油消耗率和NOx排放,但小喷孔直径的喷油持续期长,后燃增加,效率下降且CO排放增加。
An one for the 4190 me system was built up electronically controlled fuel injection system was put forward to replace the traditional dium speed marine diesel engine. The model of electronically controlled fuel injection based on the AMESim software to determine a better combination of cam profile, nozzle hole diameter, pump plunger diameter and high pressure fuel pipe length. Actual fuel injection flow and rate can be obtained by the IFR600 measurement device. The effects of the location of cam working part for fuel supply, injector protrusion, nozzle hole diameter and fuel injection timing on fuel consumption and emission were found out through engine bench test. The test results show that the location of cam working part for fuel supply affects fuel injection flow and rate a lot, and the consequent fuel consumption and emission, and that the small injector protrusion is adopted, the higher fuel consumption results, and the smaller nozzle hole diameter is Used, the larger fuel supply advance angle for the lowest fuel consumption is required. With the nozzle hole diameter decreasing the fuel injection pressure increases, which helps improve fuel economy and NOx emission, but makes fuel injection duration extend and post combustion increase, this is harmful to fuel economy and CO emission.
出处
《内燃机工程》
EI
CAS
CSCD
北大核心
2015年第2期138-144,共7页
Chinese Internal Combustion Engine Engineering
基金
福建省自然科学基金项目(2012J01230)
关键词
内燃机
中速柴油机
船舶
电控燃油喷射
性能
IC engine
medium speed diesel engine
marine
electronicallycontrolled fuel injection system
performance
作者简介
朱钰（1964-），女，副教授，硕士，主要研究方向为轮机工程，E-mail：zhuyu2009@hotmail．com。
