共查询到20条相似文献,搜索用时 140 毫秒
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<正>车型:2012款新科帕奇2.4L。行驶里程:16563km。 故障现象:发动机故障指示灯和电子手刹维修灯常亮,松不了手刹(客户反映此故障已经出现3次)。 故障诊断:首先用GDS2诊断仪检测,发动机控制模块有故障码:P069E 燃油泵控制模块已请求亮起故障指示灯、U0073 通信总线A控制模块关闭。燃油泵控制模块有故障码U0073 控制模块通信高速CAN 总线关闭。GDS2无法与驻车制动控制模块、后差速器离合器控制模块通信 相似文献
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<正>故障现象一辆2013款捷豹XF车,搭载3.0 L机械增压发动机(型号为AJ126),累计行驶里程约为20.6万km。车主反映,该车发动机偶尔无法起动,同时组合仪表上会提示很多故障信息;多按几次起动按钮或等待一会儿,发动机又能起动着机了。故障诊断接车后试车,故障未能再现。用故障检测仪检测,发现多个控制模块中均存储有间歇故障代码“U0001-88高速CAN通信总线”(图1),以及与其他控制模块失去通信的故障代码。梳理丢失通信的控制模块,如防抱死制动控制模块(ABS)、变速器控制模块(TCM)、发动机控制模块(ECM)、组合仪表控制模块(IPC)等均在高速CAN通信总线上,由此推断该车高速CAN通信总线偶尔工作不良。 相似文献
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<正>故障现象一辆2017款雪佛兰科鲁兹车,搭载1.5 L发动机,累计行驶里程约为5万km。车主反映,车辆在行驶过程中换挡冲击力大,有时动力不足。故障诊断接车后首先试车,发现行驶过程中基本上每次换挡时都会出现发闯的现象。检查车辆没有加装及改装,使用故障检测仪检测,在变速器控制模块与发动机控制模块中均存储有多个“U”字开头的故障代码。对比故障代码发现,在变速器控制模块与发动机控制模块中均存储有故障代码“U0073 CAN总线通信”, 相似文献
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<正>故障现象一辆北汽福田城市公交车,搭载YC6J240-40发动机,采用BOSCH高压共轨燃油喷射控制系统和宁波雪利曼CAN总线系统。该车在行驶中发动机有时会自动熄火,熄火后一般需等待15 min左右才能重新起动着机,曾在其他修理厂更换过前部CAN总线控制模块和后部CAN总线控制模块,未能将故障排除。 相似文献
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<正>故障现象一辆2012款雪佛兰科鲁兹车,搭载1.8 L发动机,累计行驶里程约为9.6万km。该车组合仪表上的发动机故障灯、ABS故障灯及动力转向故障灯偶尔异常点亮,同时发动机转速表和发动机冷却液温度表的指针会突然归零,严重时发动机无法起动。故障诊断用故障检测仪检测,发现存储有很多以字母“U”开头的通信类故障代码,如“U0100-00与发动机控制模块失去通信”“U0101-00与变速器控制模块失去通信”“U0073-00控制模块通信总线断开”等,由此怀疑高速GMLAN总线偶尔存在通信故障。 相似文献
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随着电子技术的发展,汽车上使用的模块越来越多,而连通众多模块的总线系统也越来越复杂。总线系统的结构及原理对于解决电气系统故障起着极其重要的作用。本文重点讨论上汽通用旗下科鲁兹汽车所使用的CAN总线系统结构及原理。对上汽通用汽车出现的CAN总线相关故障及解决办法进行阐述。 相似文献
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<正>车型:E70,配置N55发动机。行驶里程:76523km。故障现象:电子手制动报警,遥控器以及便捷登车功能不能使用。故障诊断:启动车辆后提示电子手制动失效,将车门关闭操作遥控器,便捷登车外拉手没任何反应。连接ISID进行快速测试,手制动模块无法与总线通信。客户也在4S店检查过,建议更换手制动模块。可能的故障原因有:◆手制动内部控制模块损坏◆总线通信有故障,以及唤醒线有 相似文献
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Attitude toward physical activity as a determinant of bus use intention: A case study in Asuke,Japan
《国际交通安全学会研究报告》2020,44(4):293-299
This study examines the effect of people's attitudes toward physical activity on their bus use intentions in rural areas in Japan. We utilized the theory of planned behavior and designated three variables—attitude toward bus use, subjective norms, and perceived behavioral control—as mediators for the hypothesized effect. Analysis results showed that attitude toward physical activity had a significant effect on bus use intention. For transport policy, this implies that improving attitudes toward physical activity can increase bus use and reduce physical inactivity, partly caused by car dependence. Results from a multiple-group analysis, for the hypothesized model, revealed that this finding is particularly valid for young people, car drivers, and people living within five minutes of the nearest bus stop. Finally, the effect of attitude toward physical activity on bus use intention is higher with the presence of mediators; these mediators help to increase the model's predictability for the variance of bus use intention from 8.6% to 64.4%. 相似文献
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关于公交票价与私家车出行关系的研究方法 总被引:1,自引:0,他引:1
该文针对研究城市公交票价与私家车出行量之间关系的需要,提出了一种理论方法。该方法用多元线性回归模型分析了城镇居民家庭人均可支配收入、私家车出行成本等因素对私家车出行需求的影响,并在此基础上结合交叉弹性理论进一步得到公交票价和私家车出行需求之间的弹性关系。通过该方法可以量化公交票价与私家车出行需求两者之间的关系,为城市采用低价公交来制约私家车出行的政策提供一些理论依据。 相似文献
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大众“3L”路波轿车是一种以极低的燃料消耗实现全功能装备、满足各种使用要求的车辆,它装备1.2L带进气冷却并采用整体式喷油器技术的涡轮增压TDI柴油机;采用二级尾气催化率装置;在其变速器结构和控制模式方面采用了诸多新技术,通过CAN数据总线实现变速器控制与发动机控制相关联。为了最大限度地降低燃料消耗量,路波轿车在车身、桥等零部件中采用了轻型材料,并利用先进的制造工艺进行生产,这一车型已成为大众公司最具创意的产品之一。 相似文献
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介绍了景程轿车可变作用力转向系统的组成和工作原理。针对该系统的常见故障,包括系统电压不正常故障、车速信号故障、控制模块故障、电磁执行器故障、警告灯常亮故障、警告灯不能点亮故障、助力作用力始终最大及助力作用力不足故障,分析了故障产生的原因,提出了故障诊断、排除的工艺流程。 相似文献
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Handheld global positioning system (GPS) devices can serve as a new tool to collect an individual's trip information with advantages of low cost, accurate data, and intensive spatial coverage. Various machine learning algorithms have been explored to detected trip train information in previous studies; however, few of them focused on the evaluation and comparison of the performance and applicability of different models. Meanwhile, according to previous studies, car and bus mode detection is a thorny issue due to their similar travel characteristics, and algorithms still need to be well explored and improved to solve this problem. In this article, an innovative method is proposed to detect trip information, including trip modes, mode-changing time and location, and other attributes, from personal trajectory data. The method is a two-step process. A machine learning algorith-based module (including artificial neural network, support vector machine, random forests, and Bayesian network) is firstly used to identify walk, bicycle, and motorized trip modes (bus or car); we thoroughly compared the performance of these four algorithms. Then a second module, using critical points on the GPS trajectories, is further developed to distinguish car and bus mode, incorporated with GIS map information. Field test results show that the proposed machine learning models can all be applied for walk, bicycle, and motorized mode detection with high detection rates exceeding 90%; however, the algorithms work relatively poorly for bus and car mode detection, with results mostly below 75%. The proposed two-step method can greatly improve bus and car mode detection accuracy by 14–30%. As a result, the average mode detection rates for all the four modes are above 90%. Compared with mode detection results by using only the machine learning algorithm, the proposed two-step method has much better performance in both accuracy and consistency. 相似文献
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电控空气悬架能够根据客车行驶工况进行车身高度自适应调节,从而能够显著提升客车行驶稳定性以及燃油经济性,车高调节控制设计具有重要意义。文章利用模糊PID控制算法对车身高度调节进行控制策略设计,有效缓解了客车电控空气悬架车高调节过程中存在的空气弹簧的“过充”“过放”及“振荡”等问题,分析客车电控空气悬架车高调节具体过程,建立包括车身、储气罐、电磁阀以及空气弹簧等在内的车高调节系统数学模型,最后完成了客车电控空气悬架车高调节模糊自适应PID控制策略设计及性能仿真验证。研究结果表明,所运用的模糊自适应PID控制策略能够完成客车电控空气悬架车身高度的准确调节。 相似文献