共查询到19条相似文献,搜索用时 187 毫秒
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电子燃油泵是燃油系统的关键零部件,燃油泵的性能与发动机的启动、运行、排放等性能直接相关。随着汽车市场的不断成熟,对燃油泵的噪声性能越来越关注;以往对于微型漩涡式燃油泵电机噪声及漩涡叶片产生的噪声及优化方案较为关注,但作为机电混合的燃油泵总成支座结构设计,引射泵的匹配研究则相对较少。由于燃油泵总成支架的结构设计与液体介质(燃油)、结构设计、工作环境紧密相关,为改善燃油泵的结构噪声、震动、声震粗糙度(noise、vibration and harshness, NVH)性能,提高燃油泵声音品质;本文根据某车型燃油泵噪声改善分析,采用计算流体力学(Computation Fluid Dynamics, CFD)数值模拟和理论分析方法,分析燃油泵结构噪声特性,提出一种结构噪声改善理论。通过环境试验设计,对改善方案进行有效性验证。 相似文献
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高压燃油泵属于直接喷射汽油机的主要部件之一。而直接喷射汽油机的高压燃油泵由于以汽油作为工作流体,其摩擦学特性(如耐磨损性、摩擦系数等)受燃油性质的影响。近年来,从乙醇汽油的应用来看,在汽油机性能方面,虽可有效地应用高辛烷值特性,但也加大了高压燃油泵摩擦学环境的复杂程度。简要介绍了高压燃油泵的技术新动向及其摩擦学环境,并在元件的滑动试验基础上阐述了高压燃油泵在运用乙醇汽油中的滑动特性。 相似文献
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随着汽车技术的不断发展,大众在燃油方面对汽车性能提出更高的要求。燃油泵是汽车燃油控制系统的重要组成部分,汽车燃油泵控制单元的故障是一种较为常见的汽车故障。对此,以迈腾B8型轿车燃油泵控制单元的故障为例,对该燃油泵控制单元的组成、工作原理及故障现象开展故障诊断,进行故障因果分析;通过对比信号波形等方法,归纳出燃油泵控制单元的结构特征,并对其故障提出修复措施和建议。 相似文献
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<正>故障现象一辆2015款奔驰G63 AMG车,搭载157发动机,累计行驶里程约为9.4万km。车主反映,该车低速行驶时,发动机偶尔会自动熄火,故障大概1个星期出现1次。故障诊断接车后路试,故障未能再现。用故障检测仪检测,燃油泵控制模块(N118)中存储有故障代码“P062700燃油泵输出端存在电气故障或短路”“P008A00燃油低压回路中的压力过低”(图1), 相似文献
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一种电动加油系统的油箱改进设计 总被引:1,自引:0,他引:1
介绍了一种电动加油系统的油箱改进设计,主要阐述电动加油系统设计及如何避免烧坏加油泵中的电机,对电机进行过载保护以及解决加油过程中油箱有气泡、透气不畅及燃油溢出的问题。 相似文献
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J. Hur 《International Journal of Automotive Technology》2010,11(4):593-600
Motorization in vehicles is expanding rapidly for fuel efficiency, customer comfort, convenience, and safety features. These
new electric loads represent an increase in the required electric power. This has generated interest in new, higher power
systems such as the 42V Power Net. The electro-hydraulic power steering (EHPS) system is one of these systems. This paper
presents the development of the electric motor-driven pump unit for the EHPS system using a 42V power-Net. The interior type
permanent magnet synchronous motor (IPMSM) can be applied to this system with more power density per volume for compactness
of the EHPS. In order to improve the system, the IPMSM and its control method was optimized for improved torque characteristics
and electric power consumption. The performances of both the pump unit and the IPMSM have been verified by experimental results.
Finally, all in one type the electric motor-driven pump unit are developed from the experiment verification. 相似文献
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An electric water pump for engine cooling system has an advantage which particularly in the cold start, the use of the electric water pump saves fuel and leads to a corresponding reduction in emissions. However, the electric water pump for internal combustion engine generates much more heat loss than that for hybrid electric vehicle or electric vehicle since it is operated by electric power of high current and low voltage. In this study, the fluid flow and thermal characteristics of the canned type electric water pump with an inverter integrated has been investigated under the effects of heat generation. The analysis conditions such as outdoor air temperature of 125°C, water pump speed of 6000 rpm, coolant temperature of 106°C and coolant flow rate of 120 L/min were used as a standard condition. Therefore, the thermal performance of the canned type electric water pump’s motor and inverter was evaluated by comparison with that of mechanical seal type. In the motor, the temperature reduced by over 10°C, and in the inverter, the amount of temperature decrease equaled to the maximum temperature difference, about 18.7°C. Also, canned type electric water pumps of variable materials were compared for the evaluation of thermal transfer performance for variable thermal conductivity of a can. The motor and inverter were cooled lower to 42°C at motor and about 40°C at inverter for reasonable selection of can’s thermal conductivity. 相似文献
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介绍国内丰田轿车发动机电动燃油泵的2种典型控制电路。对每种控制电路的工作原理、控制过程进行了详细说明,并给出了丰田威驰和锐志实车控制电路,为分析、排除不同丰田发动机电动燃油泵故障提供了依据。 相似文献
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介绍用微机、金属管浮子传感器和DSP控制系统组成的测定装置,代替用玻璃浮子量油的传统PT燃油泵试验台,解决了目前门燃油泵试验台现存的量油系统误差大的问题,从而使我国在试验柴油机盯泵总成方面有新的提高。 相似文献
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柴油机燃油喷射系统流体动力学研究进展 总被引:1,自引:0,他引:1
针对柴油机燃油喷射系统的流体动力学问题,从影响模拟精度的角度出发,分别对燃油黏性、空化、燃油的变物性和流体-结构耦合等方面进行了综述,旨在为今后更加深入的研究提供参考。概述了柴油机燃油喷射系统流体动力学研究的发展现状,提出了未来发展的方向:开展高压油泵柱塞腔、喷油器控制腔和蓄压腔等腔体内燃油的高维流体动力学分析;考虑流体内部及流体-结构耦合传热引起的温度场变化;考虑燃油物性随温度和压力的变化及变化率;对喷射系统建立流-固-热强耦合瞬态分析模型,分析水击压力、管道振动及泄漏问题;继续进行燃油的高温高压特性测试。 相似文献