共查询到20条相似文献,搜索用时 497 毫秒
1.
文中介绍了一种国内外最新的非导电燃油管静电释放技术:将部分非导电燃油管的尼龙层剥皮,烧结一层导电热缩管,然后夹上导电管夹并与车身相连释放静电荷。用电介质物理学解释燃油管静电释放特性,并对此方案所涉及的试验设计、试验结果作了介绍,从而有效预防燃油管因静电释放不当而引发的燃烧。 相似文献
2.
3.
4.
5.
<正>2.燃油系统的检修1)燃油分配管的拆装燃油分配管(如图13所示)装在进气歧管上,与喷油器相连,其功能是将压力燃油分配到喷油器,并支撑燃油压力调节器。①拆卸:断开喷油器上的插头连接;如图14所示将真空管与燃油压力 相似文献
6.
7.
汽车国六排放标准燃油系统因引入了车载油气回收系统,加油时背压增大,提前跳枪风险提高。文章以加油管转弯半径、水平段长度和垂直高度这三个因素的四个参数水平为研究对象,基于正交试验法设计了16种加油管方案,并进行性能试验,得到不同组合方案下加油的最高加油速率。通过非线性多元回归方法建立加油提前跳枪预测模型,并对模型进行试验验证。加油管参数对加油性能影响的灵敏度分析得到影响加油提前跳枪的关键因素。分析结果表明,加油管垂直高度对加油提前跳枪风险影响最大,加油管转弯半径、水平段长度和垂直高度优水平分别为100 mm、362 mm和644 mm。 相似文献
8.
近些年来,在降低对不可再生石油资源的依赖程度、鼓励研究和使用更具可持续性的燃料的大背景下,生物燃料或添加酒精的燃料应运出现,这促进了多层管在燃料传动系统中的应用。同时,越来越苛刻的关于汽车排放标准的颁布和实施也极大地促进了多层管技术的发展。现有的燃油管路解决方案因燃油管的渗透性问题,并不能满足使用生物燃油的要求以及苛刻的排放法规,阿科玛公司开发的独特的多层管技术可以帮助克服现有燃油管路的局限。 相似文献
9.
依据德国大众汽车公司汽车发动机复合橡胶燃油软管标准,研制了CA488发动机燃油管。根据使用要求及强度要求对内外胶层胶料及编织层织物材料进行选择,并根据选择的胶料进行了配方设计。针对德国大众汽车公司的标准进行了性能测试,结果表明,这种设计解决了复合橡胶燃油胶管过早老化龟裂等问题。 相似文献
10.
改变传动系单一匹配提高整车燃油经济性 总被引:1,自引:0,他引:1
燃油经济性是载货汽车最重要的性能指标之一。选用具有代表性的几台样车,进行等速行驶燃油消耗量试验和多工况行驶燃油消耗量试验,对试验数据进行对比分析和理论计算,得到不同传动比对整车燃油经济性的影响,并据此设计了几种较为合适的传动系匹配方案,以满足不同用户的要求。 相似文献
11.
12.
C. -H. Lee J. -M. Lee M. -S. Choi C. -K. Kim E. -B. Koh 《International Journal of Automotive Technology》2011,12(2):193-198
Since the invention of automobiles, the need to know the braking performance of vehicles has been acknowledged. However, because
there are numerous design variables as well as nonlinearities in the braking system, it is difficult to predict the performance
accurately. In this paper, a computational program is developed to estimate the braking performance numerically. This synthetic
braking performance program accounts for pedal force, pedal travel and deceleration of braking parts, such as master cylinder,
booster, valve, brake pad, rotor, and hoses. To improve the accuracy of program, a semi-empirical model of a braking system
is introduced by using the empirical test data of pad compression, hose expansion and the friction coefficient between the
pad and rotor. The accuracy of the estimation is evaluated by comparing it to the actual vehicle test results. The developed
program is easy for the brake system engineers to manipulate and it can be used in the development of new vehicles by incorporating
the graphical presentations. 相似文献
13.
14.
15.
介绍国内湿喷机的使用现状及2种主要机型使用中存在的问题,重点阐述了PS4J湿喷机的技术途径和结构原理,对如何提高挤压胶管的使用寿命进行了研究,给出了挤压胶管中心弯曲半径的估算方法,叙述了挤压泵脉冲的改进方法及本机与JD-150混凝土搅拌机的配套特性,陈述了本机的综合技术性能。 相似文献
16.
To solve the power steering (PS) hose oil leakage problem in automobile applications, a new geometry design of the metal fitting is required, and the swaging conditions applied to the PS hose should be optimized. In this study, a new metal fitting geometry for the PS hose was proposed. A CAE simulation for both the proposed and the conventional metal fittings was conducted, and both the stress and the strain in the PS hose were compared. An experimental verification was also performed with these two different metal fittings. Additionally, the swaging conditions were optimized by the durability cycle time, which was measured in an impulse test of the swaged PS hose. For a more economical production, practical working conditions were also recommended and experimentally verified. 相似文献
17.
The objective of this study is to investigate the dynamic deformation characteristics of an automotive A/C hose assembly using
the finite element method and experimentation. The finite element analysis consisted of two analyses, specifically, a modal
and a transient analysis. The dynamic modal analysis was conducted to assess the dynamic characteristics of the A/C hose structure,
and the dynamic transient analysis was performed to investigate the dynamic stresses of an automotive A/C hose by dynamic
loading with particular emphasis on the reinforced braid. Furthermore, the analyses results are expected to provide useful
reference data in the design optimization of the hose layout related to the constrained design space. Modal testing was undertaken
to verify the FE model. The FE result was in good agreement with the experimental results. The modal analysis result showed
that the bending and swing modes of the hose occurred in the first six natural frequencies. The dynamic transient result showed
that the maximum stress in the hose components occurred in the reinforced braid layers, which are particularly damage-prone. 相似文献
18.
缺失技术资料的旧拱桥现场调查方法研究 总被引:1,自引:0,他引:1
对于大多缺乏原始设计和施工资料的旧拱桥,很难对其承载能力作出准确的评定。以一座旧双曲拱桥的调查为例,提出了通过结构尺寸、拱轴线、截面配筋、材料强度和病害情况调查来恢复旧拱桥图纸的方法。该方法可以为缺失技术资料的旧拱桥的调查、检测提供参考。 相似文献
19.
粉煤灰水泥粉体颗粒堆积密度对其性能的影响 总被引:4,自引:0,他引:4
将纯硅酸盐水泥、粉煤灰按不同的粉磨时间和匹配处理成若干个不同颗粒群分布的试样,粉煤灰和水泥以各种颗粒群匹配(粉煤灰掺量均为40%)制成一系列粉煤灰硅酸盐水泥,进行胶砂强度、流动度检验。采用灰色关联分析方法研究粉煤灰水泥颗粒群堆积密度对粉煤灰水泥强度与流动度的影响。系统深入地研究了堆积密实程度与水泥胶砂性能的关系,为粉煤灰的有效利用提供理论依据。 相似文献
20.
改性沥青防水粘结层存在抗剪切强度低、施工工艺复杂、需要撒布碎石等不足.为此,开发了新型防水粘结层-高分子沥青基防水粘结层(简称PCMA),该材料具有抗剪切强度高、施工方便和不需要撒布碎石等优点.为了验证PCMA的实际应用效果,在汕梅高速公路水泥混凝土路面大修工程中进行了试验路施工.根据试验路的现场检测结果表明:PCMA的剪切强度、拉拔强度和疲劳寿命均明显高于常规防水粘结层,对于提高刚柔复合结构的使用寿命具有重要的应用价值. 相似文献