共查询到18条相似文献,搜索用时 62 毫秒
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新型减摩润滑剂改善汽油/柴油发动机动力性能的研究 总被引:1,自引:1,他引:0
利用合成和复配技术制备了新型减摩润滑剂,采用WD615型柴油发动机和C698QA型汽油发动机进行了全速全负荷的加速强化台架试验和300摩托小时的可靠性台架试验,考察了该润滑剂作为CD15W/40和SF10W/30机油添加剂对发动机功率、扭矩、机械损失、油耗等外特性的影响。结果表明:研制的减摩润滑剂在改善车辆发动机的动力性能和延长使用寿命方面具有良好的效果.与CD15W/40机油相比,该润滑剂能够使柴油发动机的功率、扭矩分别提高2.1%、2.0%.降低机械损失4%,节省油耗达1.8%;与SF10W/30机油相比,使用新型减摩润滑剂后的汽油发动机最人功率和最大扭矩分别升高了6.1%和2.0%,油耗降低了6.0%。这是由于该润滑剂充分利用了配方中多种功能添加剂的单剂特性和复合协同功效,提升了传统润滑油的减摩润滑性能和整体性能。 相似文献
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有机减摩剂在节能发动机油中的应用 总被引:1,自引:0,他引:1
分析了节能发动机油对减摩剂的要求及用于评价GF-4节能发动机油的程序VIB台架的特性,介绍了各类有机减摩剂在节能发动机油中的应用情况。将有机钼减摩剂和无灰有机减摩剂分别添加至GF-3节能发动机油中,通过SRV摩擦试验比较它们的减摩能力,并归纳了两类有机减摩剂的特性和优缺点。有机钼减摩剂高温减摩能力显著,但在苛刻的工况下减摩性能、极压负荷性能和燃料经济性保持能力不理想。一些无灰有机减摩剂低温时减摩能力较好,并表现出很好的燃料经济性保持能力,与其他添加剂复合,一些无灰有机减摩剂具有和有机钼相同的减摩能力。 相似文献
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本文通过对几种典型的发动机润滑油添加剂的对比试验,研究了此类减摩抗磨添加剂在二冲程汽油机油中的使用效果,试验结果表明某些添加剂在专用摩擦磨损试验机上的试验结果和发动机台架试验结果存在明显差异,据此本文提出了选用润滑油添加剂的建议。 相似文献
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毛健峰 《机电产品开发与创新》2005,18(6):180-181
减摩涂层是一种类似涂料的产品。然而,它们当中包含的不是有色颜料,而是分散于经过精心选择并混合的树脂与溶剂中的超微固体润滑颗粒。对于特定的润滑与防腐特性而言,选择正确的原料以及合适的润滑剂含量十分重要。除了油脂和油等流动性润滑剂外(在可能的情况下还可以取而代之) 相似文献
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毛健峰 《机电产品开发与创新》2005,18(5):162-163
减摩涂层是一种类似涂料的产品。然而,它们当中包含的不是有色颜料,而是分散于经过精心选择并混合的树脂与溶剂中的超微固体润滑颗粒。对于特定的润滑与防腐特性而言,选择正确的原料以及合适的润滑剂含量十分重要。除了油脂和油等流动性润滑剂外(在可能的情况下还可以取而代之),MOLYKOTE减摩涂层形成了一个覆盖所有粗糙表面的滑动薄膜,可以在极度承载下避免金属与金属间的摩擦。它们可用常规的涂刷技术:喷涂,浸渍与涂刷。常用的使用方法有涂刷/喷涂筒,离心设备,静电或自动喷涂,印刷以及工业中广为人知的干燥与固化方法一辊涂。这些干燥与固化方法所用时间周期介于3分钟空气干燥与60分钟炉温固化之间。 相似文献
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天然气发动机及其润滑油 总被引:1,自引:0,他引:1
研究了天然气对汽车发动机性能的影响及配套润滑油的发展与前景。天然气作为汽车燃料能显著减少排放污染,并具有良好的经济性。但汽车使用天然气作燃料时,会导致发动机功率下降和早期磨损。 相似文献
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Bench tests have been used to screen lubricants and additives for industrial fluids in machinery applications for a long time. As the cost of engine testing increases dramatically, the need for simple laboratory bench tests increases. Bench tests simulate a particular aspect of the engine operation such as oxidation or wear, but the engine operation blends both mechanical, chemical, and combustion processes together and allows these parameters to interact freely. There are many bench tests providing a measure of oxidation stability under simulated conditions. For a given application, while the generic aspects of the lubricant degradation mechanism may be similar, environmental factors such as oxygen availability, the presence of specific metals (catalytic effects), and residence times of the oil at high-temperature regions may be specific to that application. Universal bench-test procedures that can predict oxidation stability therefore are not feasible. As described in part I of this paper, a computer simulation program has been developed combining a chemical kinetic model and a finite-difference program to simulate the engine operating conditions to predict lubricant performance in a diesel engine. This paper describes the bench-test procedures used to determine the kinetic constants used in the kinetic model to describe the lubricant degradation processes. The bench tests are specifically designed for the determination of kinetic constants in general for a particular reaction path but take into account the particular environmental factors intrinsic in the Caterpillar 1K engine dynamometer test. 相似文献
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针对国外四冲程摩托车发动机润滑油分类及评定存在的问题,建立经国家主管部门认可的评定装置与技术。本评定方法采用高强化摩托车发动机作为评定机,采用摩托车离合器试验台测量摩擦特性,并制定了相应的评定技术参数和评定指标。该评定方法针对摩托车发动机及摩托车离合器试验台,能区分油品质量高低,已成功用于四冲程摩托车润滑油的研究,研发出多种高品质4T摩托车专用油。 相似文献
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纳米Al/Sn金属颗粒对润滑油抗磨极压性能的影响 总被引:6,自引:2,他引:6
利用四球试验机分别对添加有纳米铅粉、锡粉以及Al Sn金属粉的润滑油进行极压和抗磨性能实验。采用SEM(扫描电子显微镜)对摩擦表面进行观察,采用EDS(能量色散谱仪)对表面进行元素测定。测试结果表明.纳米Al Sn金属粉可在较宽的载荷范围内明显改善润滑油的极压抗磨性能。其作用机理是锡粉在低载荷阶段沉积到摩擦表面起到抗磨剂作用,铝粉在高载荷阶段沉积到摩擦表面起到极压剂作用.从而实现了在低载荷到高载荷范围内对润滑油抗磨极压性能的提高. 相似文献
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The ability of a lubricant to protect increasingly complex diesel engines directly affects engine durability and warranty costs and is becoming increasingly costly to validate. This paper presents a novel approach combining a chemical kinetic model using rate constants determined by a set of laboratory bench tests and a finite-difference computer program to predict lubricant performance in a given diesel engine. The computer program takes into account the engine's mechanical design, such as temperature, pressure, oil flow rate, top ring zone volume, and other parameters. The chemical kinetic model incorporates the kinetic rate constants determined for that particular lubricant in a set of special bench-test procedures tailored to a particular engine and its operating conditions. The bench-test procedures take into account the necessary environment in that particular engine such as specific metal catalysis, oxidation conditions, and deposit formation. The computer program then combines the lubricant degradation model with the engine operating sequence to yield a predictive simulation. This approach is capable of predicting the amount of deposit in the top ring groove and the amount of oil consumption in that engine. The computer program models the engine as three chemical reactors in series. The three reactors are: the oil sump, the top piston ring groove, and the piston cylinder-liner interface. Oil flows from the sump to the piston rings and to the piston liner area. The oxidation process is described by a set of simplified chemical kinetic rate equations. The kinetic constants of the lubricant are determined by laboratory bench-test procedures using Differential Scanning Calorimetry (DSC), a Thermal Gravimetric Analyzer (TGA), and the Micro-Oxidation test apparatus. The design and the operating conditions of the engine define the chemical reaction conditions used in the simulation program such as the temperatures of the reactions, the residence time in a particular reactor, the volume of the reactors, and the operating sequence of the engine. The simulation program is validated by the Caterpillar 1K engine dynamometer test results. Two experimental high-temperature lubricants and three IK reference oils were used in this study. Good agreement between model simulation and 1K engine test results was obtained. 相似文献