排序方式: 共有35条查询结果,搜索用时 31 毫秒
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电控双阀喷油系统多次喷射过程中预喷控制参数直接影响系统在主喷射过程中的喷油量特性.为研究全工况范围内预喷控制参数对主喷油量的影响规律及成因机理,利用AMESim数值模型,揭示了电控双阀喷油系统在不同控制模式下,预喷控制参数对主喷油量的影响规律.结果得出在SCV控制模式下,随着预主喷间隔的增加,主喷油量先减小后逐渐趋于稳定.而在NCV控制模式下,随着预主喷间隔的增加,主喷油量逐渐增大,主喷油量在高转速、大主喷脉宽时变化显著.2种模式下预喷脉宽对主喷油量的影响都不明显,随预喷脉宽的变化主喷油量变化范围为1 mm3. 相似文献
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Liu Peng Fan Liyun Zhou Wei Ma Xiuzhen Song Enzhe 《Journal of Mechanical Science and Technology》2017,31(8):4019-4028
Journal of Mechanical Science and Technology - High-speed electromagnetic actuator (HEA) is the key component of Electronic fuel injection system (EFIS) of diesel engine, its dynamic performances... 相似文献
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Plasma electrolytic oxidation was undertaken on Zircaloy-4 in alkaline silicate and pyrophosphate electrolytes, with a square waveform AC current regime. The resultant coatings were examined using scanning electron spectroscopy, X-ray diffraction and nanoindentation. The coatings formed in silicate electrolyte comprised mainly a porous inner layer and a more compact outer layer, with characteristic solidification structures being evident following prolonged treatment. The coatings contained monoclinic and tetragonal ZrO2, the latter being mainly present in the outer layer, which was of hardness up to ∼8 GPa. In contrast, extensively cracked coatings resulted from use of pyrophosphate electrolyte; the coating integrity was improved by the addition of silicate to the pyrophosphate electrolyte. The different morphologies of the coatings appeared to be related to the differing nature of the microdischarges and to the incorporation of silicon species that enhanced the formation of t-ZrO2. 相似文献
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为了更好地调节柴油机转速,采用模型参考自适应控制(model reference adaptive control,MRAC)策略扩展的离散时间积分最小控制综合(discrete-time minimum control synthesize integration,DTMCSI)算法,来达到转速动态快速跟踪和闭环控制稳定的效果。将自适应算法在已完成精度验证的柴油机转速模型上进行仿真验证后,与传统的比例积分微分(proportion integration differentiation,PID)控制策略进行比较,并将该算法在快速控制原型系统搭建的试验平台上进行试验验证。试验结果表明该算法具有快速跟踪转速变化和抗干扰能力,控制性能达到国家二级电站标准,可以实际应用。 相似文献
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跟据平均值原理建立了增压柴油机进气系统、增压器、扭矩计算、喷油泵、柴油机动力学和排气系统的数学模型,根据所建立的数学模型,应用Tesis DYNAware建立了增压柴油机参数化仿真模型。利用所建立的仿真模型、dSPACE仿真平台、接口设备、真实的柴油机电子调速系统和真实的执行器设计,实现了柴油机电子调速系统硬件在环仿真平台,并进行了起动、调速功能验证,仿真结果与配机实验值的比较,结果表明仿真测试平台精度高、实时性好、测试工况完整、功能完备、通用性强。 相似文献
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