Common marine low-speed engines have been designed to burn heavy fuel oil (HFO) or marine gas oil (MGO). HFO is produced from residuals of the crude oil refining process and, therefore, contains higher values of inorganic components, such as sulphur, ash, and metals as well as organic com...
Don’t attempt to give the same solution that has seemingly failed to an error code that keeps coming on. There are modern vehicle engines and onboard control systems that can only be easily understood by a professional who understands it. So unless you have the right tools and training to ...
Therefore the last and maximum weighting applied for the five feasible indicators (assets, revenue, greenhouse gas (GHG) emissions, employment, and women participating in management) is 15%, cumulating to a value of 75% of fixed weighting within all indicators; in other words, the individual ...
用汽油机的主流趋势.但是,采用涡轮 增压技术也存在一些问题 [5].由于进气压力和温度的 增加,会导致压缩终了缸内温度升高和压力增加,以 及发动机热负荷增加,使发动机爆震倾向增大.一般 可通过进气中冷,提高燃油辛烷值,降低压缩比,推 迟点火角,加浓混合气,废气再循环(exhaust gas recir- culation, EGR)等技术手段...
ahighsootlevel.ItwasalsoobservedthatwiththehighlevelsoftheEGR,boththecarbonmonoxideandunburnedhydrocarbon emissionsincrease.Theeffectisattributedtothereducedoxygenconcentrationandtheloweredflametemperature. Keywords:dieselengines;exhaustgasrecirculation(EGR);boostpressurecontrol;injectionstrategy;lowtemperature combustion...
ExhaustGasRecirculationSystemTheExhaustGasRecirculation(EGR)systemisdesignedtoreducetheamountofOxidesofNitrogen(NOx)createdbytheengineduringopera..
废气再循环系统(exhaust gas recirculation,EGR)中冷 器旁通,进气中冷旁通,增压器旁通,排气管优化等 技术 [37].最终 NOx 后处理系统如图 3 所示,采用了双 催化还原催化器 (SCR) 双喷射系统,在常规 SCR 之外, 还采用了一个紧耦合的低起燃温度 SCR(ccLO-SCR). 在 ccLO-SCR 上游不再采用柴油氧化催化器 (...
systems;thesituationofbackpressurevalvescanaffecttheperformanceofdieselengineswithhighpressuresys2 tems;thelowpressureEGRsystemswithsurgetankshavetheleastincreaseoffuelconsumptionandpowerloss. 摘要:废气再循环是简单有效地减少NO X 排放的方法。本文讨论了在柴油机中实现 EGR的方法,并以一台4缸柴油机为例计算了不同...
In engine evolution, EGR technique was firstly adopted in diesel engines in order to limit thermal NO X formation rate by reducing combustion chamber temperature thanks to the dilution of fresh charge with a certain amount of exhaust gas recycled at engine in- ...
(15 左右,可匹配高辛烷值 汽油 RON ≥ 98), 超 膨胀比循环(如 Atkinson 循环 或 Miller 循环),高冷却废气再循环系统 (exhaust gas recirculation, EGR) ,低温燃烧,长冲程等节能技术提 升热效率(图 10),目前比亚迪,广汽,吉利,东风等 企业都开发出了峰值有效热效率超过 41% 的混动专用 汽油机,正在朝 45%...