搜索结果: 1-13 共查到“工学 Piston”相关记录13条 . 查询时间(0.059 秒)
Alaskan Flight Trials of a Synthetic Vision System for Instrument Landings of a Piston Twin Aircraft
Alaskan Flight Trials Synthetic Vision System Instrument Landings Piston Twin Aircraft
2015/6/29
Stanford University has developed a low-cost prototype synthetic vision system and flight tested it onboard general aviation aircraft. The display aids pilots by providing an “out the window” view, ma...
Microstructure and Mechanical Behavior of In Situ Primary Si/Mg2Si Locally Reinforced Aluminum Matrix Composites Piston by Centrifugal Cast
Piston Centrifugal casting In situ composite Primary Si Mg2Si
2011/8/5
Al-Si pistons are frequently damaged by burning piston top surface due to elevated combustion temperature, and, by rubbing the first ring groove against the engine cylinder liner. To prevent from thes...
Microstructure and Mechanical Behavior of In Situ Primary Si/Mg2Si Locally Reinforced Aluminum Matrix Composites Piston by Centrifugal Casting
Piston Centrifugal casting In situ composite Primary Si Mg2Si
2011/8/4
Al-Si pistons are frequently damaged by burning piston top surface due to elevated combustion temperature, and, by rubbing the first ring groove against the engine cylinder liner.
轴向柱塞泵流动特性理论建模与试验分析（Modelling and Experiment Study on Fluid Character of Axial Piston Pump）
轴向柱塞泵 数学模型 流动特性
2010/1/28
利用油液可压缩特性建立了单柱塞流动特性模型，通过对柱塞运动规律、配流盘过流面积、节流系数、泄漏效应等重要参数的分析优化，提高了模型精度，在此基础上，利用集中参数建立了柱塞泵的整泵数学模型。通过Matlab编程建立了柱塞泵流动特性的仿真模型，编制了图形用户界面，能够实现对柱塞泵结构、工作参数、系统环境参数与柱塞泵流动特性(如压力冲击、流量脉动等)之间的自动仿真和分析。利用柱塞泵压力流量脉动测试试验台...
The influence of the engine load on value and temperature distribution in the piston of the turbocharged Diesel engine
Numerical techniques Heat loads Piston
2009/12/14
Purpose: The determination of the temperature distribution in the piston in initial phase of the work of the turbocharged Diesel engine.
Design/methodology/approach: The results of calculations of th...
Use of SEM and EDS analysis in the investigation of Al-Si-Cu piston alloy cast porosity
casting porosity piston
2009/10/23
Porosity formation was detected in the casting thinnest section in the proximity of the as cast surface and near the wall centerline. In order to investigate the cause of the porosity formation light ...
轴向柱塞泵平面配流副润滑特征参数实时测量（Real-time Measurement on Lubrication Characteristic Parameters of Plane Port Pair in Axial Piston Pumps）
轴向柱塞泵 配流副 润滑特性
2009/9/25
为研究轴向柱塞泵配流副的摩擦学特性，建立了模拟配流机构的润滑特性试验系统，以实测润滑特征参数，对工况进行实时调节与控制，寻求良好的润滑状态。论述了配流副润滑特性试验研究的优点，根据润滑理论模型分析了供油压力和油膜厚度等主要特征参数，提出了膜厚反馈的电液控制配流副油膜动态试验装置的结构及关键技术。通过平面配流密封带多点实测膜厚、泄漏流量、摩擦转矩的试验数据表明，供油压力对密封带润滑油膜厚度、形态等的...
恒流恒压状态下径向柱塞泵定子振动时频域特性分析（Analysis on the Vibration of Stator of Radial Piston Pump on the Mode of Constant Flow and Pressure in Time and Frequency Domain）
径向柱塞泵 定子 振动特性
2009/8/11
基于牛顿力学法建立了径向柱塞泵定子的动力学模型，对恒流及恒压状态下的振动时频域特性进行分析；设计振动测试装置对JB32H型径向柱塞泵定子进行振动试验研究。分析及试验结果表明：在两种状态下，定子振动在时域上呈现出周期性，恒压状态下的时域幅值小于恒流状态的时域幅值；恒流状态下定子振动频带宽，振动处于相对较高的频率段；恒压状态下振动频带窄，振动处于相对较低的频率段；恒压系统具有低通滤波的作用。
两冲程HCCI自由活塞式内燃发电机仿真（Simulation of Two Stroke HCCI Free Piston Linear Alternator）
发电机 自由活塞 Matlab/Simulink Chemkin
2009/5/22
综合利用Matlab/Simulink、Chemkin、电磁场有限元法对HCCI自由活塞式内燃发电机建立了仿真模型。分析了系统的运动特征，阐明了它与传统内燃机运动规律的差异。讨论了变负荷、燃空当量比下自由活塞式内燃机的变压缩比特性。仿真结果表明，自由活塞式内燃发电机能够根据外部参数调节压缩比，当工作在高压缩比下时，有利于提高燃烧效率、降低内燃机排放。
液压约束活塞发动机（HCPE）集成传统的内燃机与液压泵为一体，将燃料燃烧产生的热能转换为液压能，是一种新型的柔性动力装置，能量平衡分析是其结构优化设计的重要依据。首先建立了HCPE的动力学模型，仿真分析了HCPE标定工况下能量输入、耗散、分配及输出情况。能量转换中，与燃烧有关的损失占57.65%、摩擦损失占6.24%、液压损失占7.78%、有效功输出占26.87%、其他损失占1.46%。有效功比率...
自由活塞式内燃发电机动态仿真与特性分析 Dynamic Simulation and Characteristic of Free Piston Generator
自由活塞 内燃机 直线电机
2009/5/18
根据自由活塞式内燃发电机的运行原理，建立了基于动力学和热力学方程的自由活塞式内燃发电机动力学模型。通过对动力学模型的数值求解，获得了系统的动态特性，并进一步分析了质量、输入能量、点火位置、负载等对系统性能的影响，同时对系统频率特性进行了研究。研究结果表明系统为自激系统，通过输入参数的合理控制，可实现系统稳定频率下的运行。
The influence of coolant scale deposit inside the internal combustion engine on the piston and cylinder deformations
internal combustion engine coolant piston cylinder deformations
2010/11/2
This paper presents the analysis of the influence of engine coolant scale deposits on the deformations in the piston – cylinder pair. The results of carried out calculations enable to make more precis...
Mathematical model of combined parametrical analysis of indicator process and thermal loading on the Diesel engine piston
diesel engine indicator process piston thermal loading
2010/11/2
In the publication the methodical aspects of a mathematical model of the combined parametrical analysis of an indicator process and thermal loading on the diesel engine piston have been considered. A ...