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故障现象:客户抱怨遥控器锁车时应急灯一直闪,如果不解锁重新锁一次,应急灯一直闪下去直到蓄电池没电,而且有时候还会听到报警响声。 相似文献
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5)闪码诊断程序闪码诊断程序见表闪码内容见表4,故障代码表见表5,故障修理指导及故障检测见表6。 相似文献
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闪码诊断是一种简单实用的诊断方法,常用于维修服务。闪码诊断可以实现以下功能:故障诊断;车辆高度的人工标定。
用于客车的WABCO(企业名称的英文缩写)的ECAS系统中的A代表空气(Air的英文缩写)。ECAS系统允许通过闪码的方法将故障显示出来,可以借助故障灯(红色)闪出故障代码。当点火开关接通后,将L线(ECU端子2)接地至少2s,一旦搭铁中断,在大约3s后出现第一个故障代码。 相似文献
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综述了动态无功功率补偿器的工作原理及其特点,介绍了其在汽车焊接生产线中的应用效果,快速动态补偿功率因数,降低网损,高效节能,增加变压器带载容量;分相动态补偿解决了焊接生产线带来的谐波和电压闪变干扰问题;就地补偿,稳定系统电压,抑制电压闪变,提高电网电压质量。 相似文献
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一种实时轨道移频信号的检测方法 总被引:5,自引:0,他引:5
针对轨道移频信号的频谱特点,采用欠采样技术对轨道移频信号进行非整周期的采样,经过计算机仿真实验,验证了基于非整周期采样方法对轨道移频信号进行实时傅里叶变换(FFT)分析检测的可行性,证明采样方法满足检测指标的要求。同时对其频率分辨率和实时性进行了讨论。 相似文献
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终点线旁的方格旗已挥下,一只雄狮眨眼之间率先冲线!我没看清它的胜者霸气,只知道它闪着叶眉双眸,呼吸的脉动狂抽猛吹,绝对不是等闲之辈。 相似文献
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三相异步电动机半电压叠频温升试验探讨 总被引:1,自引:0,他引:1
“三相异步电动机半电压叠频温升试验”主要就是将国家标准中推荐的“降低电压负载法”和“定子叠频法”有机地结合起来,分别进行“空载状态下的温升试验”和“半载状态下的叠频温升试验”,并把试验的结果,利用有关的公式进行计算,来推算满载时绕组的温升。 相似文献
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阐述了闪急沸腾喷雾的基本原理,通过比较分析闪急沸腾喷雾与传统喷雾的差异,指出闪急沸腾喷雾是一种极具潜力的燃油喷射方式;论述了近年来国内外对过热燃油和溶气燃油闪急沸腾喷雾研究的进展与现状,介绍了过热液体闪急沸腾喷雾的数学模型及其发展,并从理论上分析了影响闪急沸腾喷雾的因素;展望了闪急沸腾喷雾的应用前景以及进一步研究的发展方向。 相似文献
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介绍常用汽车闪光控制继电器原理及应用局限性,详细阐述一种新型汽车LED灯闪光控制继电器及其控制方法,该设计采用MCU及辅助控制电路替代了常用的闪光专用控制IC(U2043B),从而克服了常规闪光控制器不能有效识别LED模块负载的弊端。 相似文献
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为适应国家推出的GB186 55—2002《用于保护车载接收机的无线电骚扰特性的限值和检测方法》,在分析汽车用闪光继电器工作原理及产生无线电骚扰原因的基础上,设计了2种解决方案。根据这2种方案的工作原理,在相同的条件下分别进行了电磁干扰噪声的测试。得出方案2完全符合要求,指出使用数字电路可以很好地解决开关电路引起的电磁兼容问题。 相似文献
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在较高燃油温度及较低环境背压下,直喷喷雾易发生闪沸。闪沸喷雾具有贯穿距小、易于雾化等优势,能够有效降低发动机排放、提高燃油经济性,在直喷发动机中具有较好应用前景。然而随着涡轮增压的使用,进气压力的提高导致喷雾较难达到闪沸状态。针对这种现象,在研究混合燃油蒸馏特性后提出了通过向高沸点燃油中添加低沸点燃油的方式来促进喷雾的闪沸。试验燃料为一系列不同比例低沸点燃油(异戊烷)与高沸点燃油(正十一烷)组成的混合燃油,通过蒸馏测试探究了不同组分燃料的蒸馏特性;通过在定容弹内拍摄不同燃油温度、环境背压下的燃油喷雾的米氏散射图,研究了混合燃油形态变化规律。结果表明,不同于单一油品仅在沸点时沸腾产生馏出物,混合燃油是在一定的温度范围内均会沸腾产生蒸馏物,表现为3段式蒸馏曲线;混合燃油蒸馏前期大部分馏出物为低沸点燃油,表明混合燃油受热时,低沸点燃油会优先蒸发;对喷雾宏观形态的测量结果表明,向高沸点燃料中添加低沸点燃油能够使喷雾在高背压下达到闪沸状态,且40%体积分数是最佳的添加量;另外,油温越高添加低沸点燃油对喷雾闪沸的促进效果越好。 相似文献
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《JSAE Review》1994,15(4):291-296
This paper presents the model analysis on atomization and vaporization processes in a flash boiling spray based on experimental results obtained from an injection system in the suction manifold of a gasoline engine. Two kinds of liquid fuel, n-Pentane and n-Hexane, are injected into quiescent gaseous atmosphere at room-temperature with low pressure through a pintle type injector. Fuel spray is observed, by taking photographs, with variation of the ambient back pressure. Then, in the flash boiling spray region where the back pressure was below the saturated vapor pressure of fuel, the bubble nucleation process due to flash boiling was modeled by both experimental results and the nucleation rate equation as a parameter of the pressure difference between back pressure and vapor pressure. Further, the fuel vaporization process was assessed by considering growth calculation of cavitation bubbles and fuel evaporation from the film surface due to heat transfer at the gas-liquid interface. Accordingly, we could estimate quantitatively the transient changes in the bubble growth and the vapor mass fraction inside the spray for each back pressure condition. 相似文献
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C. H. Jang C. S. Kim K. C. Jo M. Sunwoo 《International Journal of Automotive Technology》2017,18(1):147-156
Sensor technologies have been innovated and enhanced rapidly for highly automated vehicle and advanced driver assistance systems (ADAS) in automotive industry; however, in order to adopt sensors into mass production vehicle in near future, various requirements should be satisfied such as cost, durability, and maintainance without any loss of overall performance of the sensors. In this sense, a 3D flash lidar is one of primising range sensors because of no moving parts, compact package, and precise measure for distance by using a laser. In spite of the several advantages, the 3D flash lidar is not commonly used in automotive industry because it is quite expensive for adoption and it is manufactured with only general purpose currently; therefore, the cost reduction and optimal design to satisfy various purposes of ADAS or autonomous driving should be accomplished. In this paper, we propose a novel approach for design factor optimization of the 3D flash lidar based on a geometrical model by using structural similarity between the 3D flash lidar and 2D digital camera. In particular, focal length and area of a receiver (focal plane array and read-out integrated circuit) which directly affect on sensor performance (field of view and maximum detection range) are optimized as the design factors. From the optimization results in simulation, we show that optimal design factors according to various purposes required in ADAS could be easily determined and the sensor performances could be evaluated before manufacturing. It will reduce temporal and economic burdens for design and manufacturing in development process. 相似文献
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《JSAE Review》1996,17(3):231-237
The MPI (multi-point injection) technique is widely used for gasoline engines due to its high responsiveness and high controllability. The pressure in the intake manifold becomes lower than the saturated vapor pressure of some components of gasoline in some operating conditions, and this causes the flash boiling phenomenon of the components. This phenomenon has great influence on spray atomization and vapor formation.In this study, the distribution of fuel vapor concentration of n-pentane was observed by applying the Infrared Extinction/Scattering method. The fuel vapor concentration can be calculated from the intensities of transmitted infrared light, under various spray conditions including the flash boiling spray. 相似文献