发动机燃油消耗评估方法.pdf

柴油机设计与制造
年第期第卷(总第期)
Design & Manufacture of Diesel Engine 2009 1 16 126
发动机燃油消耗评估方法
张庆良
(邯郸职业技术学院机电系,河北邯郸 056005)
摘要简介了燃油消耗测量方法中的容积法、质量法以及碳平衡法的测量原理,讨论了使用
上述不同测试方法时试验系统的区别,陈述了各种方法对硬件的要求,比较了碳平衡法中定容取
样系统和开式排气稀释取样系统的区别,分析了应用碳平衡法与传统油耗测量方法试验结果差异
的原因。
关键词:油耗碳平衡法取样
Methods for Evaluating Engine Fuel Consumption
Zhang Qingliang
(Mechatronics Department, Handan Polytechnic College, Handan 056005, China)
Abstract: Auto fuel economy is evaluated by measuring fuel consumption rate. Fuel
consumption rate is measured in transient mode or steady mode. The principles of
gravimetric, volumetric and carbon balance methods are introduced. The difference of three
experiment systems is discussed. Relevant hardware requirements are illustrated. The
difference of constant volume sampling system and open exhaust dilution sampling system
applied in carbon balance method is showed. Reason of the difference in experimental results
of carbon balance method and traditional fuel consumption quantity method is analyzed.
Key words: fuel consumption, carbon balance method, sampling
间计算而得,其公式为:
1 前言 t [1]
燃油经济性是发动机综合性能的一项重要指()
GT = 1
标,一般使用燃油消耗率来评价油耗率的测定方法()
。 ge=1000GT /P 2
有容积法和质量法,流量计法和流速计法前种方式中,
。 2
法可测得所消耗燃油的容积和质量,主要应用于测小时耗油量, ;
GT ——— kg/h
定发动机稳定工况的燃油消耗;后种方法可测得在燃油密度, ;
2 ρ——— kg/L
一定时间内通过的燃油容积或质量,主要用于测定油耗率, ;
ge ——— g/(kW·h)
发动机瞬态工况的油耗此