陕柴—大发DL—32柴油机的开发

概述６ＤＬ－２２柴油机的设计目标和设计上的主要改进措施。通过一系列改进,降低了柴油机燃油耗率,机油耗率,并能燃用高燃度重油,改善了柴油机在低负荷时的运转性能,提高了主要部件的使用寿命。同时通过对首台陕柴－大发６ＤＬ－２２柴油机的试验,验证了上述结论。     

陕柴-大发DL-22柴油机的开发

概述６ＤＬ－２２柴油机的设计目标和设计上的主要改进措施。通过一系列改进,降低了柴油机燃油耗率、机油耗率,并能燃用高粘度重油,改善了柴油机在低负荷时的运转性能,提高了主要零部件的使用寿命。同时通过对首台陕柴－大发６ＤＬ－２２柴油机的试验,验证了上述结论。     

降低6DS—18A柴油机燃油消耗率的研究

讨论了６ＤＳ－１８Ａ柴油机性能改善的主要措施，通过气缸盖气道的改进设计，减少流动阻力，提高通流系数和涡流比，改善了燃烧过程；同时采用ＮＲ１５／４增压器工替ＶＴＲ１６１增压器，提高了涡轮增压器效率，从而使６ＤＳ－１８Ａ柴油机的燃油消耗率下降１２ｇ／ｋＷ．ｈ。     

6DS—18A型柴油机进排气道改进设计与试验研究

本文针对６ＤＳ－１８Ａ型柴油机进排气道存在的问题进行改进设计，对结构参数、布置参数、喉口构型等进行了多方案的试验研究，优化组合，取得了最佳方案；对新老气道还进行装机对比试验，结果表明，改进后的气道缸盖与原缸盖相比，可使柴油机在标定工况下降低燃油消耗率５．８ｇ／ｋＷｈ。     

国内外柴油机文献题录

我国内燃机产品与技术发展预测［刊］／翁祖亮／／内燃 机工程·一１９９９，（３）·一１～７世界大功率柴油机发展应用综述［刊］／徐定海／／柴油 机·－１９９９，（３）·－１～５陕柴－大发 ＤＬ·２２柴油机的开发［刊］／闫甲良／／内燃 机·－１９９９，（４）·－３～６ＳＬ２１０５Ａ型柴油机的设计研制［刊］／李文贵／／柴油 机·－ １９９９，（ ３）·－６～９摆盘发动机主要结构参数多目标优化数学模型的研 究［刊］／胡欲立／／船舶工程·－１９９９，（５）·－１９～ ２１，１２零部件柴油机连杆形状的研究［刊，译］／…     

6DS－18A型柴油机进排气道改进设计与试验研究

本文针对６ＤＳ－１８Ａ型柴油机进排气道存在的问题进行改进设计，对结构参数、布置参数、喉口构型等进行了多方案的试验研究，优化组合，取得了最佳方案；对新老气道还进行装机对比试验，结果表明，改进后的气道缸盖与原缸盖相比，可使柴油机在标定工况下降低燃油消耗率５．８ｇ／ｋＷｈ。     

7FDL—16型柴油机气缸盖结构分析

７ＦＤＬ－１６型柴油机是美国ＧＥ公司内燃机车的动力，为了满足柴油机日趋强化、机械负荷和热负荷不断增加的要求，缸盖采用了许多独特的结构，本文在材质、结构、冷却、密封等方面进行简要的分析。     

L－V20／27柴油机进、排气凸轮──滚轮表面“粘结”现象及对策

Ｌ－Ｖ２０／２７柴油机进、排气凸轮──滚轮表面“粘结”现象及对策四川柴油机厂漆品邦，黄舟川Ｌ－Ｖ２０／２７系列柴油讥是我国引进德国Ｍ·Ａ·Ｎ－Ｂ·＆·Ｗ公司具有８０年代国际水平的四冲程柴油机。适用于内河船舶主机、大型船舶辅机、陆用电站等。功率范围为２...     

计算直喷式柴油机螺旋进气道与缸内空气运动的大型微机化程序：IPIC—CFD

使用ＩＰＩＣ－ＣＦＤ程序在国内首次对直喷式柴油机螺旋进气道－进气门－气缸内空气运动进行了稳流和实机三维数值模拟。并运用激光多普勒（ＬＤＡ）技术对稳态进气过程中的空气运动进行测试,验证了所建模型的精度和可靠性。     

B／FL413F风冷柴油机低噪声设计分析

德国道依茨公司（ＫＨＤ）生产的Ｂ／ＦＬ４１３Ｆ风冷柴油机在低噪声设计方面达到了很高水平。本文分析讨论了该柴油机在降低噪声方面的设计措施，探讨了国际上在降低柴油机噪声方面的主要研究成果和手段。     

国产机车柴油机燃油喷射系统的改进

从国产机车柴油机的运用特点出发,根据国外的成功经验,对调车用机车柴油机供油系统进行了改进。为了提高国产干线主型机车柴油机燃油喷射系统工作可靠性、耐久性,对国产240系列柴油机的燃油系统进行了攻关改进,改进方案经过油泵台、多缸机、实际装车、扩大装车运用考核表明,改进达到了预期的目的,已于1998年1月通过部级鉴定。     

畜禽场柴油发电机沼气-柴油双燃料转换技术的优化

介绍了将畜禽场柴油发电机转换为沼气-柴油双燃料发电机的基本方法和关键部件的设计要点，提出了更符合内燃机燃烧特性的沼气净化与输配技术措施，使得沼气-柴油双燃料发电机在保持原柴油发电机使用特性的同时，大幅降低柴油的消耗量，取得良好的实际效果。     

美国伊思顿联合循环示范电站中的燃煤柴油机技术

本文介绍美国柯派·拜什姆活塞产品公司以水煤装为主燃料和柴油作引燃燃料的燃煤柴油机技术开发的成功经验，其中包括对原燃煤柴油机的结构改进、水煤浆燃料成分、排放控制措施以及燃煤柴油发电机组的应用概况．     

电控柴油/天然气双燃料发动机排放试验研究

作者研制开发了混合气双燃料发动机的电控系统，发动机起动和怠速时只燃用柴油；当转速超过某设定值，电控系统便发出指令限制柴油的喷油量，天然气就经混合器进入气缸参与燃烧，柴油只起引燃作用，通过控制天然气供给量的大小米改变负荷。结果表明，与原机相比，它显著降低了碳烟及NOx的排放。     

Experimental investigation on biogas enrichment with hydrogen for improving the combustion in diesel engine operating under dual fuel mode

Biogas valorization as fuel for internal combustion engines is one of the alternative fuels, which could be an interesting way to cope the fossil fuel depletion and the current environmental degradation. In this circumstance, an experimental investigation is achieved on a single cylinder DI diesel engine running under dual fuel mode with a focus on the improvement of biogas/diesel fuel combustion by hydrogen enrichment. In the present investigation, the mixture of biogas, containing 70% CH₄ and 30% CO₂, is blended with the desired amount of H₂ (up to 10, 15 and 20% by volume) by using MTI 200 analytical instrument gas chromatograph, which flow thereafter towards the engine intake manifold and mix with the intake air. Depending on engine load conditions, the volumetric composition of the inducted gaseous fraction is 20–50% biogas, 2–10% H₂ and 45–78% air. Near the end of the compression stroke, a small amount of diesel pilot fuel is injected to initiate the combustion of the gas–air mixture. Firstly, the engine was tested on conventional diesel mode (baseline case) and then under dual fuel mode using the biogas. Consequently, hydrogen has partially enriched the biogas. Combustion characteristics, performance parameters and pollutant emissions were investigated in-depth and compared. The results have shown that biogas enriched with 20% H₂ leads to 20% decrease of methane content in the overall exhaust emissions, associated with an improvement in engine performance. The emission levels of unburned hydrocarbon (UHC) and carbon monoxide (CO) are decreased up to 25% and 30% respectively. When the equivalence ratio is increased, a supplement decrease in UHC and CO emissions is achieved up to 28% and 30% respectively when loading the engine at 60%.     

Biodiesel production from inedible animal tallow and an experimental investigation of its use as alternative fuel in a direct injection diesel engine

In this study, a substitute fuel for diesel engines was produced from inedible animal tallow and its usability was investigated as pure biodiesel and its blends with petroleum diesel fuel in a diesel engine. Tallow methyl ester as biodiesel fuel was prepared by base-catalyzed transesterification of the fat with methanol in the presence of NaOH as catalyst. Fuel properties of methyl ester, diesel fuel and blends of them (5%, 20% and 50% by volume) were determined. Viscosity and density of fatty acid methyl ester have been found to meet ASTM D6751 and EN 14214 specifications. Viscosity and density of tallow methyl esters are found to be very close to that of diesel. The calorific value of biodiesel is found to be slightly lower than that of diesel. An experimental study was carried out in order to investigate of its usability as alternative fuel of tallow methyl ester in a direct injection diesel engine. It was observed that the addition of biodiesel to the diesel fuel decreases the effective efficiency of engine and increases the specific fuel consumption. This is due to the lower heating value of biodiesel compared to diesel fuel. However, the effective engine power was comparable by biodiesel compared with diesel fuel. Emissions of carbon monoxide (CO), oxides of nitrogen (NO_x), sulphur dioxide (SO₂) and smoke opacity were reduced around 15%, 38.5%, 72.7% and 56.8%, respectively, in case of tallow methyl esters (B100) compared to diesel fuel. Besides, the lowest CO, NO_x emissions and the highest exhaust temperature were obtained for B20 among all other fuels. The reductions in exhaust emissions made tallow methyl esters and its blends, especially B20 a suitable alternative fuel for diesel and thus could help in controlling air pollution. Based on this study, animal tallow methyl esters and its blends with petroleum diesel fuel can be used a substitute for diesel in direct injection diesel engines without any engine modification.     

Theoretical study of the effects of engine parameters on performance and emissions of a pilot ignited natural gas diesel engine

With the increasing concern regarding diesel vehicle emissions and the rising cost of the liquid diesel fuel as well, more conventional diesel engines internationally are pursuing the option of converting to use natural gas as a supplement for the conventional diesel fuel (dual fuel natural gas/diesel engines). The most common natural gas/diesel operating mode is referred to as the pilot ignited natural gas diesel engine (PINGDE) where most of the engine power output is provided by the gaseous fuel while a pilot amount of the liquid diesel fuel injected near the end of the compression stroke is used only as an ignition source of the gaseous fuel–air mixture. The specific engine operating mode, in comparison with conventional diesel fuel operation, suffers from low brake engine efficiency and high carbon monoxide (CO) emissions. In order to be examined the effect of increased air inlet temperature combined with increased pilot fuel quantity on performance and exhaust emissions of a PINGD engine, a theoretical investigation has been conducted by applying a comprehensive two-zone phenomenological model on a high-speed, pilot ignited, natural gas diesel engine located at the authors' laboratory. The main objectives of the present work are to record the variation of the relative impact each one of the above mentioned parameters has on performance and exhaust emissions and also to reveal the advantages and disadvantages each one of the proposed method. It becomes more necessary at high engine load conditions where the simultaneous increase of the specific engine parameters may lead to undesirable results with nitric oxide emissions.     

A renewable pathway towards increased utilization of hydrogen in diesel engines

In the present work, dual fuel operation of a diesel engine has been experimentally investigated using biodiesel and hydrogen as the test fuels. Jatropha Curcas biodiesel is used as the pilot fuel, which is directly injected in the combustion chamber using conventional diesel injector. The main fuel (hydrogen) is injected in the intake manifold using a hydrogen injector and electronic control unit. In dual fuel mode, engine operations are studied at varying engine loads at the maximum pilot fuel substitution conditions. The engine performance parameters such as maximum pilot fuel substitution, brake thermal efficiency and brake specific energy consumption are investigated. On emission side, oxides of nitrogen, hydrocarbon, carbon monoxide and smoke emissions are analysed. Based on the results, it is found that biodiesel-hydrogen dual fuel engine could utilize up to 80.7% and 24.5% hydrogen (by energy share) at low and high loads respectively along with improved brake thermal efficiency. Furthermore, hydrocarbon, carbon monoxide and smoke emissions are significantly reduced compared to single fuel diesel engine operation. Exhaust gas recirculation (EGR) has also been studied with biodiesel-hydrogen dual fuel engine operations. It is found that EGR could improve the utilization of hydrogen in dual fuel engine, especially at the high loads. The effect of EGR is also found to reduce high nitrogen oxide emissions from the dual fuel engine and brake thermal efficiency is not significantly affected.     

生物制气-柴油双燃料发动机燃烧及排放分析

采用气化炉热解气化各种农林废弃的生物质,得到可燃生物制气。将柴油机改制成双燃料发动机,用生物制气作为主要燃料,由柴油引燃。测量生物制气-柴油双燃料发动机在最大扭矩转速时的气缸压力及废气排放,分析燃烧特性及对排放物生成的影响,并对比分析柴油机与双燃料发动机的差别。     

提高190柴油机喷油嘴性能的试验研究

本文通过试验研究,对１９０系列柴油机喷油嘴的设计和加工工艺进行了大量改进,使喷油嘴性能和柴油机燃油耗率获得了明显改善．