浅析涡轮增压器技术问题

本文旨在对废气涡轮增压器在选型、匹配和应用中常见的技术问题，进行具有针对性的分析和探讨。通过选型匹配模型讨论、涡轮增压器开发应用中的常见问题，借助仿真模型选择与应用、应用中常见问题分析，对废气涡轮增压器在选配和应用中须注意的问题，进行了系统的探讨。     

关于发动机废气涡轮增压技术的研究

随着科技的发展,废气涡轮增压技术在汽车发动机上的使用越来越广泛,汽车发动机采用废气涡轮增压技术后,动力性、经济性、排放性都比自然进气式发动机有了明显改善。文章针对发动机的废气涡轮增压技术的结构、工作原理及现状与优缺点进行了论述,并且对废气涡轮增压器的新材料以及新技术进行了分析及展望。     

浅析汽车涡轮增压器的使用与维修

本文通过对涡轮增压器工作原理及使用、保养和维修问题进行探究,使涡轮增压器增加其使用寿命。从而达到延长私家车的使用寿命和节约成本的目的。     

霍尼韦尔中国新涡轮增压器工厂在武汉正式开业

正全球领先的汽车涡轮增压器制造商霍尼韦尔涡轮增压技术部今日在武汉庆祝其新涡轮增压器工厂正式开业。武汉新工厂将使霍尼韦尔在中国的涡轮增压器产能提升至三倍,以满足中国迅速增长的涡轮增压需求。目前,涡轮增压技术在中国新车市场的渗透率为23%,未来这一数字还将显著增长。"我们对中国涡轮增压器市场的前景备感振奋,今年我们在中国市场上推出的新产品已经占到我们全球新品的四分之一。"霍尼韦尔交通系统集团总裁兼首席执行官韩泰凌先生表示:"随着中国对节能减排越来越关注,涡轮增压对中国消费者来说已     

WARTSILA8L46C型废气/增压系统旁通阀异常开启对主机工况的影响与对策

本文通过对某船WARTSILA 8L46C型柴油机废气旁通阀和增压空气旁通阀异常开启对主机工况的影响及对策的分析,最终找出故障原因,提出了在日常使用中的管理对策。     

涡轮部件及螺柱标准件同轴度测量系统的研制

涡轮增压器与变速箱在精密机械制造行业中应用广泛,涡轮部件及螺柱标准件的尺寸准确度是涡轮增压器和变速箱装配精度的一个重要保证,其中同轴度是涡轮部件及螺柱标准件尺寸准确度的一个关键参数,根据涡轮部件及螺柱标准件的同轴度测量需求,研制了一套涡轮部件及螺柱标准件同轴度的测量系统,并基于LabVIEW开发了测量软件。通过实验对螺柱标准件M12的同轴度进行测量并完成测量不确定度评定。实验结果显示四次测量得到的同轴度误差在6.3~6.5 μm,扩展不确定度达2.6 μm,结论表明:研制的同轴度测量系统适用于涡轮部件及螺柱标准件同轴度的高精度测量。     

基于GT-POWER的可变喷嘴涡轮增压器匹配分析

利用GT-POWER软件仿真软件,建立某可变喷嘴涡轮增压柴油机的仿真模型,通过比较两款可变喷嘴涡轮增压器(VNT)与发动机的联合运行曲线,选择最优的涡轮增压器。通过研究增压器的增压压力、压气机效率,柴油机扭矩、有效燃油消耗率与VNT开度变化的趋势,分析了VNT开度对发动机性能的动力性,经济性的影响,以便为增压系统设计提供依据。     

车用涡轮增压器离线仿真研究

笔者讨论基于Matlab/Simulink的涡轮增压器准线性模型的建模方法,并在Matlab/Simulink的仿真环境下实现了涡轮增压器的离线仿真,同时给出了仿真模型的结构图和瞬态工况下的仿真结果,分析得出仿真结果和实验结果接近。     

机车内燃机涡轮增压器导向叶轮的故障分析与激光修复

对某机车内燃机涡轮增压器导向叶轮的故障进行了分析, 提出了采用激光熔覆法修复受损叶轮。通过对激光熔覆样品的拉伸与疲劳性能测试, 验证了激光熔覆法修复该机车内燃机增压器导向叶轮的可行性。     

ARM嵌入式增压器性能测试与分析系统研究

国内涡轮增压器出厂试验,传统方式是采用指针式仪表,通过人工方式读取试验数据的手段进行。为了改变国内增压器厂落后的增压器性能测试技术,提高增压器性能测试的效率和自动化与智能程度,该文设计了一套以嵌入式ARM7处理器为核心的增压器性能测试系统,并以嵌入式Linux操作系统为平台,实现了数据采集(包括增压器的转速、温度、压力、流量等13路信号)、参数监测、性能分析、远程传输和测试报告打印等多种功能。通过重庆江津径流增压器厂的应用表明,该系统功能完善,运行可靠,测试数据精确,显示界面友好,操作简单,提高了测试工作的效率,其具有广阔的应用前景。     

基于FPGA的电磁阀控制设计与研究

针对航空飞行器在飞行试验中需要精确控制滚控发动机电磁阀的难题,从电磁阀自身特点入手,设计了控制硬件电路并建立电磁阀门硬件电路灭弧电路响应时间模型,成功卸载60.5V反向大电压,详细分析影响电磁阀的时间因素,同时也提出了基于FPGA的电磁阀可配置脉冲的实现方式。目前,该电磁阀控制设计已成功应用于地面发动机测试设备,具有较好的实时性、安全性和时间响应性能。     

Design, control, and energetic characterization of a solenoid-injected monopropellant-powered actuator

This paper describes a direct-injection configuration of a monopropellant-powered actuator that is intended to provide high-energy-density actuation for a self-powered position- or force-controlled human-scale robot. The proposed actuator is pressurized by a pair of solenoid injection valves (each of which control the flow of a monopropellant through a catalyst pack and directly into the respective side of a pneumatic-type cylinder), and depressurized via a three-way hot-gas proportional exhaust valve. A controller is described that coordinates the control of the two solenoid propellant injection valves, together with the control of the proportional hot-gas exhaust valve, in order to provide actuator force tracking. Experimental results are presented that validate the effectiveness of the force-control approach. Finally, energetic performance of the proposed actuator is experimentally assessed and shown to provide an energetic figure of merit, an order of magnitude greater than that of a battery-powered servomotor approach.     

一种电磁阀回路通用测试模块的设计方法

本文提供了一种标准化的航空器通用测试模块的设计方法。其主要功能是完成飞行器上火工品和电磁阀回路的阻值测试,以保证各火工品及电磁阀回路的状态正常。其采用VPX标准的6U模块化设计,通过接收地面指令,按照固定的顺序对每一路火工品和电磁阀回路阻值进行分时轮循测试。     

高速电磁阀在自适应单车试验系统中的应用

单车试验系统是模拟火车刹车时列车底部列管的排风减压过程,进而对火车制动机进行检测的工具。随着新型车辆的研制,车辆列管容积不断发生变化,原有系统已不能适应新型车辆的检测要求。自适应单车试验系统利用经典PID控制理论,通过对脉宽调制式高速电磁阀的控制,使各种列管容积的车型试验排风曲线都很好地跟踪标准压力曲线,达到了铁道部对制动机进行试验要求。     

Development of a high-speed solenoid valve-investigation of theenergizing circuits

The electrical circuits developed for the purpose of energizing the solenoid valve are examined. These circuits, called the dummy coil method, where energy stored in a dummy coil in the form of a magnetic field is transferred to an energizing solenoid, and the pre-energize method, where the solenoid is electrically energized in advance by taking advantage of the solenoid's attraction force characteristics, are discussed. The results of experiments show that the pre-energize method is highly effective in speeding up the operation of solenoid valves. These experimental results are discussed along with the results of calculations conducted using a mathematical model     

New polarized electromagnetic actuators as integrated mechatronic components — design and application

This paper presents an overview over the computer-aided design process of mechatronic devices and systems, especially the design of electrodynamic and electromagnetic drives using modern high-energy permanent magnetic materials like NdFeB and SmCo. This paper also presents some examples of such actuators. The first example is a miniaturized pneumatic valve for industrial applications. This valve has an integrated bi-stable polarized solenoid actuator. The second example is a polarized electromagnetic valve manufactured by modern batch technologies using photo-structurable glass material. The valve seat and the actuator coils are realized using this glass material. The third example is a gripping device with compliant mechanism and planar moving coil actuator.     

Development of a high-speed solenoid valve: investigation ofsolenoids

The authors have developed a high-speed solenoid valve with a 1 ms switching time to control diesel engines electronically. In this paper, the authors focused their attention on developing the solenoid itself, investigating methods to be used for the fast operation of the solenoid valve. First, by using a mathematical model, they quantitatively examined the effects of design particulars, such as the dimensions of the solenoids and the number of turns of coil, on the switching time. According to the results obtained by the above examinations, they studied an effective method for fast switching. Next, they investigated appropriate and comprehensive methods that would satisfy given specifications under the various restrictions inherent in the solenoid valve's operation. In the final stage, they manufactured solenoid valves in accordance with the investigated methods, and evaluated their performance     

一种高压共轨喷油器的驱动电路设计

分析了高压共轨喷油器电磁阀工作原理,设计的驱动模块采用高电压、大电流对电磁阀的开启加以控制,随后采用低电压、小电流的PWM波维持导通,满足了高压共轨喷油器电磁阀驱动控制的要求。试验表明此驱动电路性能优异,设计运行可靠,能满足高压共轨喷油器电磁阀驱动控制的要求。     

基于ATmega16L的电液伺服控制系统设计

针对电液伺服闭环控制过程中,设定信号不断发生变化,电液阀门位置定位精确度较低的难题.采用AT-mega16L作为核心控制器,并配有高精度A/D、D/A转换器,通过对阀门开度控制信号和位置反馈信号进行采集、转换、计算和比较,发出控制信号决定并执行换向阀的换向、交流伺服电动机的起停运转,推动液压缸推杆的伸缩,进而对阀门转角大小、开度百分比进行精确定位.     

High-gain observer-based pump/valve combined control for heavy vehicle electro-hydraulic servo steering system

Electro-hydraulic servo steering system (EHSSS) has been widely used in multi-axle heavy vehicles. Noteworthy, the traditional EHSSS controlled only by servo solenoid valve has amounts of energy loss in throttling orifice. Although the steering control accuracy is ensured, it leads to low energy efficiency. In this paper, a novel pump/valve combined control (PVCC) EHSSS is proposed to increase the energy efficiency, which only uses one servo motor pump and one servo solenoid valve to drive the steering trapezoid mechanism. Based on the control objectives of low pressure difference in valve orifice and high steering tracking performance, a dual-input-dual-output control strategy is proposed. To guarantee the high steering tracking performance of PVCC steering system, a high-gain observer based sliding mode controller (HGO-SMC) is designed for controlling the spool displacement of servo solenoid valve. During the steering process, the servo motor pump is controlled by a simple speed feedforward and PID controller, so that the pressure difference in throttling orifice is kept at a low value to reduce the energy wasted. The experimental comparison results show that the proposed method can achieve the same tracking performance as valve control EHSSS with less energy consumption.