五气门气道喷射发动机实施稀混合气燃烧的一种新解决方案

本文提出一种改善五气门电控气道喷射汽油机稀薄燃烧的新方案－组合喷射稀薄燃烧，并对影响稀燃性能和排放的因素进行了试验研究。试验结果表明，两个喷油器的喷油量和喷油定时对油耗和 明显的影响。采用组合喷射稀薄混合气燃烧与采用单进气道喷射相比，在部分负荷时的排放和油耗都有明显的改善。     

EQ6100发动机液化石油气供给系统研制

本文通过用液化石油气作为汽油机的代用燃料在东风ＥＱ６１００发动机上进行试验研究，详细介绍了单燃料系统主要部件的结构特点，发动机台架性能试验与整车道路试验结果。     

无分电器点火实时控制系统

介绍了一种分电器点火实时控制系统的工作原理，设计特点及硬件，软件设计，以沈阳产ＳＹ４９２汽油机为对象，在发动机架上进行的对比试验表明，应用此分无电器电火实时控制系统，能够准确无误地实现点火正时，使节油率达３％～９％。     

活塞销偏置对EQ6100型汽油机摩擦损失功率和噪声的影响

通过对发动机点火运行时活塞组摩擦力及发动机整机噪声的实时测量，研究了活塞销正，反偏置量对ＥＱ６１００型汽油机摩擦损失功率和噪声的影响，研究结果表明，活塞销反偏置可以减小ＥＱ６１００型汽油机的摩擦损失，而对其噪声的影响很小。     

Experimental investigation and comparison of nanoparticle emission characteristics in light-duty vehicles for two different fuels

In recent years, particle number emissions rather than particulate mass emissions in automotive engines have become the subject with controversial discussions. Recent results from studies of health effects imply that it is possible that particulate mass does not properly correlate with the variety of health effects attributed to engine exhaust. The concern is now focusing on nano-sized particles emitted from I. C. engines. In this study, particulate mass and particle number concentration emitted from light-duty vehicles were investigated for a better understanding of the characteristics of the engine PM from different types of fuels, such as gasoline and diesel fuel. Engine nano-particle mass and size distributions of four test vehicles were measured by a condensation particle counter system, which is recommended by the particle measurement program in Europe (PMP), at the end of a dilution tunnel along a NEDC test mode on a chassis dynamometer. We found that particle number concentrations of diesel passenger vehicles with DPF system are lower than gasoline passenger vehicles, but PM mass has some similar values. However, in diesel vehicles with DPF system, PM mass and particle number concentrations were greatly influenced by PM regeneration. Particle emissions in light-duty vehicles emitted about 90% at the ECE15 cycle in NEDC test mode, regardless of vehicle fuel type. Particle emissions at the early cold condition of engine were highly emitted in the test mode.     

Effects of intake flow on the spray structure of a multi-hole injector in a DISI engine

The spray characteristics of a 6-hole injector were examined in a single cylinder optical direct injection spark ignition engine. The effects of injection timing, in-cylinder charge motion, fuel injection pressure, and coolant temperature were investigated using the 2-dimensional Mie scattering technique. It was confirmed that the in-cylinder charge motion played a major role in the fuel spray distribution during the induction stroke while injection timing had to be carefully considered at high injection pressures during the compression stroke to prevent spray impingement on the piston.     

汽车发动机空燃比的计算与测量

文章应用燃烧化学反应的基本理论,推导了根据排气组成计算空燃比的计算公式,分析了空燃比计算的影响因素,并对AVL4000五气分析仪测得的结果进行了比较分析,为汽车发动机空燃比的计算及测量提供依据。     

基于BP神经网络的车用汽油机过渡工况空燃比多步预测模型

为克服车用汽油机空燃比传输延迟对空燃比控制精度的影响,提出了一种基于BP神经网络的空燃比多步预测模型。通过对空燃比数学模型的分析,确定神经网络空燃比多步预测模型的输入向量,同时为提高空燃比预测精度,在神经网络输入向量中增加反映空燃比变化趋势的导数信息。以HL495发动机过渡工况试验数据进行仿真,结果表明该方法能精确预测过渡工况空燃比。     

混合动力车用汽油机电控节气门系统的开发研究

为使发动机满足混合动力系统转矩分配控制的需要,针对TJ376QE电喷汽油机,采用步进电机将其机械节气门改造成电控节气门,利用MC68376单片机TPU模块的步进电机控制功能,实现了电控节气门开度的有效控制。台架联合调试结果表明,所开发的电控节气门系统具有较高的响应速度和控制稳定性,可准确执行主控制器的发动机转矩控制指令。     

基于信息融合的汽油机过渡工况进气流量预测方法

在分析汽油机过渡工况下各种影响进气流量因素的基础上,提出了一种基于信息融合的进气流量预测方法。通过该方法提取了汽油机过渡工况的动态特征参数信息,建立了进气流量神经网络预测模型,并以车用汽油机加、减速工况实测数据为样本进行了仿真研究,结果表明,该方法能够准确地实时预测汽油机过渡工况的进气流量,同时能够消除空气流量传感器的滞后特性。