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车用发动机增压技术现状及市场预测 总被引:9,自引:2,他引:7
通过介绍国内外车用发动机增压技术发展的历史和现状,分析总结了车用发动机增压技术发展和目前市场的特点;根据我国目前汽车工业的发展对增压技术日益增长的要求,对“九五”期间和21世纪初我国车用发动机增压技术的发展趋势、市场需求、生产工艺和装备水平等进行分析预测。 相似文献
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车用发动机增压技术现状及市场预测(续) 总被引:2,自引:2,他引:0
通过介绍国内外车用发动机增压技术发展的历史和现状,分析总结了车用发动机增压技术发展和目前市场的特点;根据我国目前汽车工业的发展对增压技术日益增长的要求.对“九五”期间和21世纪初我国车用发动机增任技术的发展趋势、市场需求、生产工艺和装备水平等进行分析预测。 相似文献
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该研究旨在分析电动汽车物理建模技术及其在典型领域的应用,通过对模型的技术分析,优化电动汽车的设计。文章基于电动汽车的工作原理和相关理论,提出可行的建模方法,运用基于牛顿力学的方法,建立了能够反映电动汽车实际运行状态的“二自由度动力学”公式模型。采用文献分析、数学建模手段建立了物理模型技术框架,可对电动汽车性能和安全性进行深入分析和优化,为后续的运动分析、控制策略设计以及性能优化提供了依据,该分析对于推动电动汽车的发展具有重要意义。 相似文献
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Lasse Moklegaard Maria Druzhinina Anna Stefanopoulou 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2001,36(2):179-201
A unified engine torque actuator for heavy-duty vehicles is developed in this paper. Based on averaging and identification of the instantaneous torque response for changes in brake valve timing and fuel flow, we derive a control oriented engine model of a six cylinder, 350 Hp turbocharged diesel engine, equipped with a compression brake. This work bridges the gap between the detailed compression crank angle based models developed in the engine design community, and the first order lag representation of diesel engine torque response used in the vehicle dynamics community. Moreover, we integrate the compression brake actuator with the service brakes and design a PI-controller that emulates the driver's actions during long descends on grades. The controller simply uses the engine speed measurement to activate the service brakes only when needed. 相似文献
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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(2-3):179-201
A unified engine torque actuator for heavy-duty vehicles is developed in this paper. Based on averaging and identification of the instantaneous torque response for changes in brake valve timing and fuel flow, we derive a control oriented engine model of a six cylinder, 350 Hp turbocharged diesel engine, equipped with a compression brake. This work bridges the gap between the detailed compression crank angle based models developed in the engine design community, and the first order lag representation of diesel engine torque response used in the vehicle dynamics community. Moreover, we integrate the compression brake actuator with the service brakes and design a PI-controller that emulates the driver's actions during long descends on grades. The controller simply uses the engine speed measurement to activate the service brakes only when needed. 相似文献
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B. Unver Y. Koyuncuoglu M. Gokasan S. Bogosyan 《International Journal of Automotive Technology》2016,17(1):13-34
The ultimate aim of this study is the development of an engine modeling approach that would facilitate the design of model-based control techniques for diesel engines. This will allow for the development of more generalized, modular control strategies for different engine types and sizes as opposed to the commonly practiced map-based engine control strategies that depend on maps and feedforward control and require lengthy modifications every time a change is made. Also, most engine modeling studies focus on either airpath or combustion systems, treating these models and their validation individually, and not as an integrated system as is actually the case. To address the need for more realistic models suitable for model-based control design, this study develops a combined airpath and combustion model for the engine, using analytical models wherever possible and derives a model with appropriate control inputs and outputs that could be used in a control scheme. The inclusion of the actuator dynamics of the Exhaust gas recirculation (EGR), variable geometry turbine (VGT), and Throttle (THR) valves in the airpath model and the consideration of nonlinearities in the combustion model allow for the development of a more thorough engine model, as well as the validation of subsystems and the whole integrated engine model using a complete World Harmonized Transient Cycle (WHTC). This test cycle finds limited use due to its challenging transients, and yet, is the demanded test cycle for emission regulations nowadays. These are unique aspects of this modeling study, the results of which indicate that the developed engine model could be used in control design and hardware-in-the-loop simulation (HILS) based engine control prototyping. 相似文献
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当今,汽车发动机电控技术日新月异,革新速度十分迅速,尤其是传统汽车燃油供给及电子点火系统作为现代汽车发动机控制系统电子的核心,是发动机检测维修从业人员必须掌握的基本技能。同时,发动机电控系统的故障不再像传统类型那样概括为纯油回路或电路故障,但故障应归纳为传感器部分,ECM部分,执行器或管线部分。传统的故障诊断方式无法满足当代汽车技术革新带来的维修需求,现有的发动机训练装置拆装装配困难,机电设备和设备成本高等因素提高对车辆维修人员和受训人员的要求更高。本文针对上述问题开发了微型汽车发动机机电一体化培训平台。 相似文献
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基于UG设计平台,应用现代数据库技术原理和现代发动机活塞设计的基本理论与方法,借助Access和VC语言,对现代活塞设计方法和设计技术进行了参数化设计开发,建立了新一代活塞参数化设计数据库,实现了现代发动机活塞参数化快速准确设计的目的,从而提高了现代发动机活塞设计的效率。 相似文献
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J. Y. Kim C. H. Jeong M. J. Jung J. H. Park D. H. Jung 《International Journal of Automotive Technology》2013,14(6):965-970
Traffic accidents are caused by various factors, which can be classified into human factors, vehicle factors and environmental factors. Recently, human factors have been drawing particular attention as efforts are being made to enhance the safety performance of vehicles and improve road conditions. Driving distraction caused by an increased driving workload is a representative human factor. Various studies in the past have attempted to quantify the driving workload by using EEG activities. However, they have failed to consider vibration properties generated from vehicle engines. A number of noise signals were included in brainwave signal processing, which resulted in a failure to obtain reliable outcomes. Thus, this study suggests driver EEG activities free of vehicle engine secondary vibration in order to develop a method that analyzes the driving workload with high statistical reliability. By using the analytical method developed in this study, standard values of driving workload for straight and left-turn driving that has statistical significance could be calculated. The analytical method for driving workload created by this study can be applied to HVI and road design. 相似文献
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用于不平路面车辆动力学仿真的轮胎模型综述 总被引:12,自引:1,他引:12
介绍了轮胎在不平路面的动力学特性。在回顾不平路面轮胎动力学模型发展的基础上,以近期的研究工作为重点,对用于不平路面车辆动力学仿真的轮胎模型进行了较为系统的介绍。概要地阐述了各种轮胎模型的建模理论、方法,并进行了分析和评述。最后,总结了不平路面轮胎力学建模的核心问题及发展方向,对不平路面车辆动力学仿真选择合适的轮胎模型给出了建议。 相似文献
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增压器涡轮叶片振动分析及其可靠性评价方法研究 总被引:1,自引:0,他引:1
针对增压器涡轮叶片振动失效模式,研究了涡轮叶片振动分析与可靠性评价方法。结合某增压器涡轮,利用共振线图建立了涡轮叶片振动失效判据。考虑涡轮叶片振动固有频率分散性与涡轮工作转速随机性的影响,建立了能够体现叶片振动固有频率、工作转速、叶片数、寿命指标、最小谐振阶数等参数的涡轮叶片振动可靠度与失效率计算模型,研究了涡轮叶片振动可靠度与失效率的变化规律,给出了涡轮叶片振动可靠寿命确定方法。运用所建立的方法及模型,能够科学地计算出增压器涡轮叶片振动的可靠度与失效率变化规律以及可靠寿命。 相似文献