基于扭矩观测器的动力传动系统扭矩控制

为了减小换档过程的冲击 ,提出基于动力传动系统模型和扭矩观测器的变速箱扭矩反馈闭环控制系统 ,在换档过程中推迟发动机点火时刻以降低变速箱输出轴扭矩 .与传统控制方法相比 ,基于扭矩观测器的闭环控制系统能够明显降低换档过程中变速箱输出轴扭矩 .实验结果表明 ,通过扭矩反馈闭环控制方法 ,可以减小变速箱换档的冲击     

基于EKF的钛酸锂电池SOC估计

精确的荷电状态(SOC)估计可以保障电池系统安全可靠地工作。钛酸锂电池优良的大倍率充放电特性使其近年来在需要大功率充放电的特种车辆上得到应用。针对使用扩展卡尔曼滤波算法估计SOC在不同模型上产生不同误差的问题,以钛酸锂电池为实验对象,针对最常用的一阶RC和二阶RC模型,利用实验数据进行了参数辨识,开展了三种不同工况下的SOC仿真研究,结果表明：两种模型的扩展卡尔曼滤波算法精度都较高,平均相对误差都在2%以内。在恒定工况下,一阶RC模型的扩展卡尔曼滤波算法有更高的精度,而在变工况下,一阶RC模型的扩展卡尔曼滤波算法比二阶RC模型精度略低,表明二阶RC模型具有更好的动态性能。     

Hardware-in-the-Loop Research on the Electronic Control Unit for Diesel Engines

A hardware-in-the-loop simulating platform is developed to avoid designing defects caused by the complicated logical structure and multiple-functional buildup of the electronic control unit(ECU)in modern diesel engines, and to diminish potential damages on components or human exposure to dangers in R&D endeavor. This platform consists of a computer installed with software Matlab/Simulink/RTW and dSPACE/ControlDesk; a diesel engine ECU, and a dSPACE autobox which runs a real-time diesel engine model. A typical model of diesel engine with turbocharger and intercooler is presented. Based on this model our research is carried out with a real ECU to test its software control strategies. Results show that by using the diesel engine model downloaded inside, the hardware-in-the-loop platform can simulate diesel engine's working conditions and generate all kinds of sensor signals which ECU needs on a real-time basis. So the ECU control strategies can be validated and relevant parameters roughly calibrated.     

Hardware-in-the-Loop Research on the Electronic Control Unit for Diesel Engines

A hardware-in-the-loop simulating platform is developed to avoid designing de fects caused by the complicated logical structure and multiple-functional build up of the electronic control unit(ECU)in modern diesel engines, and to diminis h potential damages on components or human exposure to dangers in R&D endeavor. This platform consists of a computer installed with software Matlab/Simulink/RTW and dSPACE/ControlDesk; a diesel engine ECU, and a dSPACE autobox which runs a real-time diesel engine model. A ty...     

Simulation of VGT control based on charge oxygen concentration

A turbocharged diesel engine model was built with the GT-Power software,and experimentally verified.Then two different control variables for the control of the variable geometry turbocharger（VGT）were described,and their distinct effects on engine performance,i.e.NOxand soot emissions and fuel consumption,were simulated and compared on the basis of this model.The results showed that NOxemissions decreased obviously with the increase of exhaust gas recirculation（EGR）rate at constant boost pressure condition,but soot emissions and fuel consumption considerably increased.It was a good way to reduce NOxemissions without increasing fuel consumption and soot emissions when VGT was controlled to maintain the excess oxygen ratio unchanged as EGR rate increases.     

电控单体泵高压燃油喷射系统的试验研究

开发了基于实时控制内核的电控单体泵式柴油机各缸独立控制系统,对电控单体泵高压燃油喷射系统进行了各种试验研究.通过各种优化标定试验研究了燃油系统控制参数对发动机工作过程和各种性能的影响,获得了各种控制变量随工况的变化的关键数据,掌握了控制系统设计的关键技术.试验结果表明发动机获得了良好的动力性、经济性和排放性能.     

电控摩托车汽油机初始MAP图的仿真计算和优化

本文介绍了一种获得电控摩托车汽油机初始MAP图和利用在线修改系统对其进行优化的新方法。它是根据循环进气量确定喷油量，并通过将进气压力和节气门开度进行转换。获得喷油脉宽MAP图；根据点火模型确定点火提前角MAP图，并在台架实验中采用在线修改系统进行优化。通过建设摩托车JS125汽油机的配机实验验证，此方法比较实用和有效。     

液力自动变速器换挡过程标定方法研究

自动变速器电控系统的开发过程包括电控系统硬件开发、软件开发和参数标定三个阶段,其中参数标定过程是实现控制策略,优化控制品质的关键环节。本文针对液力自动变速器换挡品质评价指标,结合Allison 2000液力自动变速器的特点及待接合离合器和待分离离合器的控制油压变化特性,制定了换挡过程开环控制策略,详细分析了需要标定的控制参数特点,确定了控制参数标定方法和标定流程,最后在DEUTZ BF4M 1013柴油机和Allison 2000自动变速器台架上进行了不同负载条件下1-2升挡过程控制参数在线标定方法实验研究。实验结果表明本文开发的液力自动变速器换挡过程控制参数标定方法能够保证换挡过程满足换挡品质的要求。     

Electronic Unit Pump Diesel Engine Control Unit Design for Integrated Powertrain System

The performance of the electronic unit pump (EUP) diesel engine is studied, it will be used in the integrated powertrain and its multi parameters are controllable. Both the theoretical analysis and experiment research are taken. A control unit for the fuel quantity and timing in crankshaft domain is designed on this basis and the engine experiment test has been done. For the constant speed camshaft driving EUP system, the fuel quantity will increase as the supply angle goes up and injection timing has no effect. The control precision can reach 1°CA. The full injection timing MAP and engine peak performance curves are made successfully.     

发动机--发电机组水电阻吸能装置电阻计算研究

在以内燃机为原动机的电传动系统研究中,要研究动力系统的特性必须对其加载,因此寻找一种吸收系统电能的方法非常重要.从研究电解液导电机理出发,分析了用水电阻吸收电能的机理和影响因素,电极和电解液构成孤立的耗能系统,可以用场理论进行计算,在此基础上提出了用能量理论计算水电阻的方法,并以该理论为指导设计了水电阻试验台,通过试验对研究结果进行了验证.