基于事件的电喷汽油机喷油点火时序控制策略研究

针对所研究的吉利MR479Q 4缸四冲程电控汽油机,分析了曲轴转速、凸轮轴位置等信号与喷油点火及同步过程关系,给出了曲轴位置同步、喷油时序、点火时序相应具体控制策略.在此基础上,提出了完整的基于事件的电喷汽油机喷油点火及同步协调控制方案,同步过程、喷油时序、点火时序控制均由相应事件激活,并将其应用于自行研发的EMS控制器中.台架试验结果表明:汽油机起动顺利,运行平稳,稳态及瞬态工况下喷油相位、喷油脉宽、闭合角及点火提前角等重要参数传递准确及时,喷油点火控制信号准确,控制策略切实可行.     

CDI点火定时优化控制方法

本文介绍一种新的点火定时优化控制方法，将三维的优化火点定时图分解为点火定时与发动机转速和点火定时与节气门开度两个二维关系曲线来处理，借助ＣＤＩ触发电路参数的调整与控制，配合具有储存功能的节气门开度传感器，再现存入的优化点火定时特性。文中简要地叙述了点火定时控制原理及有关节气门储存传感器的设计与结构     

CDI点火定时优化控制方法

本文介绍一种新的点火定时优化控制方法，将三维的优化火点定时图分解为点火定时与发动机转速和点火定时与节气门开度两个二维关系曲线来处理，借助ＣＤＩ触发电路参数的调整与控制，配合具有储存功能的节气门开度传感器，再现存入的优化点火定时特性。     

FAI电喷摩托车应用电子节气门的研究

介绍了在FAI电喷摩托车上应用电子节气门的研究.开发了一套电子节气门控制系统,对过渡工况下节气门的运动进行合理控制,并实现了摩托车的怠速控制、高速限制控制、巡航控制等功能.     

混合动力车汽油机电控系统台架稳态工况试验研究

对并联型混合动力车的发动机控制策略和汽油机原机特性进行了研究,特别是对发动机ECU中不同转速下的点火提前角-转矩-喷油脉宽之间的关系和节气门开度与输出转矩、燃油消耗率的关系进行了探讨,为混合动力车发动机标定试验奠定了基础。     

ATV用LJ276M汽油机电控系统参数的标定

介绍了ATV用LJ276M汽油机台架系统构成及搭建,以及汽油机电控系统稳态工况参数标定的步骤。汽油机电控系统的控制参数-喷油脉宽和点火提前角是影响发动机性能的关键,通过对电控参数精细寻优标定后的电喷发动机进行台架试验,验证了加装精细标定后电控系统的发动机在动力性、经济性方面比原化油器式发动机均有显著提高。     

摩托车汽油机电喷系统怠速工况的优化匹配研究

本文介绍了自行研的发四冲程摩托车汽油机用MCEFI电喷系统在发动机怠速工况的研究。通过改变喷油脉宽和点火提前角来优化怠速排放指标。并就间隔喷油技术对四冲程汽油机怠速运转的影响进行了研究。     

电喷摩托车节气门体总成检测系统

为适应FAI摩托车电喷系统的批量生产，开发了一套功能齐全的节气门体总成检测系统，实现对节气门体品质的完整而高效率的试验和检测，从而为节气门体批量生产时的质量控制提供了手段和保障。     

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。     

考虑附壁油膜影响的汽油机初始喷油MAP制取新方法

在开发一个新型发动机或控制系统时,最大的挑战之一就是构建发动机的初始MAP图。对汽油机平均值模型的节气门体子模型、进气管子模型和充气效率模型进行了简要的分析与介绍,并在该模型的基础上耦合了基本喷油脉宽的数学模型,其中考虑了油膜蒸发对喷油量的影响,在MATLAB/SIMULINK环境下仿真得出了Ricardo E6单缸汽油机电控燃油喷射系统的初始喷油脉宽MAP图。在75%和100%节气门开度、不同转速下进行试验验证了该模型的准确性和可靠性。结果表明该模型可以用作汽油机进气道电控喷射系统的设计,得出的基本喷油脉宽MAP图可以作为保证发动机运转的初始MAP图,从而能大大缩短电喷系统的改造周期。     

Optimising multi-objective control methodology of a hydrogen powered car

This paper presents the optimising control technique for a Toyota Corolla four-cylinder, 1.8-L hydrogen powered car. Based on the extensive experimental tuning data, statistical two stage models and calibration generation methodology are carried out, in which ignition timing, injection timing, injection duration and corresponding lambda value (indicate air to fuel ratio) are chosen as control variables while engine output torque and exhaust NOx emissions are chosen as performance index functions. The trade-off study is employed to optimise performance of hydrogen engine by considering different optimisation objectives at different engine operating states. Those engine operating states are defined by the throttle position and opening speed of throttle, except start and idle load states that need the auxiliary control parameters to be added in. Each value of ignition advance, lambda, injection duration and injection end angle are tested and the hydrogen engine is found to have good drivability and reliable on road optimisation. This work is a step towards establishing optimising control methodology of hydrogen powered car via application of advanced power train techniques while saving time, money and limiting damage for innovative hydrogen engine in early experimental fine tuning process.     

节气门位置智能电涡流传感器

本文将电涡流技术和单片微型计算机技术相结合,研制出节气门位置智能电涡流传感器。该传感器性能价格比高,将在电子燃油喷射系统中起重要作用。     

Performance,combustion and emission characteristics of a spark‐ignition engine with simultaneous injection of n‐butanol and gasoline in comparison to blended butanol and gasoline

Simultaneous injection of n‐butanol and gasoline through a new system of two injectors directing the sprays towards the back of the intake valve in a spark‐ignition engine was tried in lieu of injecting a blend of these fuels through a single injector. This system avoids the problem of phase separation, which is generally faced during the use of alcohol‐gasoline blends. Experiments were conducted on a spark‐ignition engine with this dual injection system using a fuel ratio of 1:1 (B50S) on the mass basis. High‐speed photographs indicated that the sprays from the injectors did not interfere till they reached the intake valve. Comparisons were made with pre‐blended butanol‐gasoline (B50) and neat (100%) gasoline at the best spark timing. All injection and spark parameters were controlled using a real time engine controller. Neat n‐butanol (B100) was superior only near full throttle with improved efficiency of the engine of about 1.2% (absolute). Heat release rates were observed to be higher and more advanced with B100 at wide open throttle. However, a reverse of this trend was observed at the throttle position of 15%. NO emission was also lower by 30% with B100 at wide open throttle as compared with gasoline. However, a small increase in carbon monoxide (CO) levels was observed because of lower post combustion temperatures as compared with gasoline and B50S. Simultaneous injection reduced hydrocarbon (HC) emissions by 13% to 50% as compared with B50 (blended fuel). HC emissions with gasoline and B50S were similar. Nitric oxide (NO) emission was lower with B50S as compared with gasoline; however it was higher than B50 because of better combustion. On the whole, the developed dual injection system was superior to the conventional method of blending in terms of performance, emissions and ability to change the fuel ratio as needed. B50S is suitable at all throttle positions, whereas B100 shows benefits at full throttle conditions. Copyright © 2013 John Wiley & Sons, Ltd.     

基于K线的电喷摩托车便携式故障显示仪的设计

基于K线通讯的基础,提出了一种电喷摩托车便携式故障显示仪的设计方案。该方案分别阐述了手持便携式显示仪的硬件系统和软件系统设计方法,并完成了样品的制作和测试环节。测试结果表明,该手持显示仪完全可实现显示电喷摩托车ECU中存储的故障,并且可清除其故障代码,以及查看发动机转速、节气门位置、进气歧管温度、压力等实时数据的功能,同时具备结构轻巧,工作稳定等特点。     

电喷摩托车发动机过渡工况测试台架的开发

为制定电控燃油喷射摩托车过渡工况控制策略，开发了一种以电子节气门控制器为核心的摩托车发动机过渡工况测试台架，实现了对节气门位置和动作速度的控制，结合宽域空燃比传感器的使用，可以精确定量地试验研究发动机过渡工况的空燃比特性，并可对测试结果实现自动采集和管理。     

摩托车发动机电喷和测控系统综合设计

在研究开发摩托车发动机电喷系统过程中,初步完成电喷系统设计后,需要进行台架实验,对摩托车发动机的运行工况进行控制并测试其各项运行参数。笔者设计了摩托车电喷系统,并将测控系统融于其中,方便了摩托车发动机台架实验,可以缩短开发周期和节约成本,系统运行良好和操作方便。     

汽油机分组喷射和点火定时同步控制策略研究

在电喷汽油机分组喷油和点火定时控制中,准确获得曲轴位置同步信号后,采用正确的定时同步控制策略是关键。针对495汽油机给出了完整的分组和定时同步控制策略及获得同步信号的方案,台架试验验证表明：该策略和方案切实可行,发动机运转平稳可靠。     

基于循环控制的LPG电喷发动机冷起动初探

基于循环控制策略，利用单循环和多循环燃烧分析方法研究了LPG发动机的冷起动特性。试验在一台四冲程、水冷125mL单缸电控喷射点燃式发动机上进行。通过对冷起动循环的缸压和瞬时转速的实对测量和分析，研究了LPG首次喷射脉宽及着火循环的关系对冷起动着火特性的影响，特别对如何实现可控循环着火进行了基于单次起动喷射脉宽的单循环和多循环燃烧研究。试验结果表明：冷起动首次着火循环对整个起动过程的HC排放及着火稳定性起着至关重要的作用；起动喷射脉宽对冷起动着火特性的影响最大，合理控制起动喷射脉宽和喷射时刻，即可实现“即喷即着”的理想可控循环着火。LPG首次着火循环所需的混合气浓度约是稳定怠速时的2．2倍；单循环起动喷射脉宽起动与多循环起动脉宽起动相比，具有HC排放低和起动可靠性好的优点。在首次喷射之前空转几循环可以使发动机的首次着火循环序数提前，并能提高冷起动可靠性。