共查询到20条相似文献,搜索用时 265 毫秒
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本论文阐述对原机的结构和性能参数进行确定,及对原机存在问题进行分析,将化油器式汽油机改成用电控汽油喷射和电子点火后。确定电控汽油机的性能参数,进行热力学计算,达到预期设计目标,使最大功率提高10%,燃油消耗率不高于原机,满足未来汽油机的经济性和排放性要求,同时满足了设计要求和原机结构要求。 相似文献
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随着汽车工业的飞速发展,以及世界能源日益枯竭的困扰,对汽车节能减排的要求越来越高。如何降低发动机的排放污染,提高其燃油经济性,成为汽车动力行业研究的主要课题。由于汽油机的燃油经济性能比柴油机差,所以降低汽油机的能耗显得更为迫切。 相似文献
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将1台普通2气门CA1102Q单缸试验汽油机改造为电控喷油式双顶置凸轮轴5气门汽油机,进气道设计为3个并列独立的气道,单孔喷油器安装在中间气道,在进气通道上布置几个进气控制阀控制进气强度。采用可变进气歧管与进气道相连接。试验结果表明,发动机的怠速排放、动力性以及燃油经济性都得到了显著的改善。 相似文献
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本文从降低排放、提高经济性、增强动力性等方面阐述了柴油机电控的必然性,对柴油机电子控制原理及燃油系统主要参数的和了概要描述,并对电控系统的 作了初步预测。 相似文献
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为使492系列汽油机能够继续生存下去,“北内”在BN492汽油机上采用了电控燃油喷射及直接点火技术并获得成功。从而较大程序地降低了排气污染,达到了了国现行的排放标准。提出了发动机的性能,降低了燃油消耗。推广应用后,将会取得重大的经济和社会效益。 相似文献
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21世纪的汽车发动机 总被引:2,自引:0,他引:2
从降低排放,改善燃油经济性两个方面,论述了21世纪车用汽油机和车用柴油的发展趋势,经分析指标出,两种发动机在改善性能,降低排谚方面可以取长补短,相互相借鉴其新技术。 相似文献
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本文用多目标规划的方法设计了空燃比分布表格,在其指导下对油特性MA进行了匹配实验。以满足提高经济性和动力性,降低排放的要求; 相似文献
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Hydraulic hybrid powertrains are a critical technology used in buses to improve fuel economy and emission performance. New exploration in configuring a parallel hydraulic hybrid bus (PHHB) is developed in this paper with no changes made to the conventional base bus driveline. An integrated model and simulation of the parallel hydraulic hybrid bus is built based on AMESim, which is used to model the hydraulic powertrain and conventional bus driveline, and interlinked with a Matlab/Simulink/Stateflow model of the control unit. Compared to conventional buses, the fuel economy of the PHHB improved by 28% in real road tests at the SMVIC (National Center of Supervision and Inspection on Motor Products Quality (Shanghai)); the approximate improvement of fuel economy was 30% in simulated runs, which validates our model. Then a Non-linear Programming by Quadratic Lagrangian algorithm (NLPQL), is applied to optimize control strategies for improving fuel economy and emissions. Simulations also demonstrate that fuel economy and emission performance can be significantly improved. However, optimum parameters for maximum fuel economy and minimum emissions are not consistent. Simulation results show tradeoffs between fuel economy and emissions in PHHB, and optimal parameters can be selected by balancing design objectives. 相似文献
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柴油机的排放污染及控制措施 总被引:5,自引:0,他引:5
介绍了柴油机排放的污染物及其生成机理。在控制柴油机排放的措施中,首先介绍了提高柴油的着火性能、降低含硫量及使用柴油添加剂等;其次,阐述了改进柴油机的燃烧过程,即改进供油系统、改进供气系统、采用废气再循环技术等;最后,介绍了柴油机的排放后处理。 相似文献
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混合动力电动汽车模糊逻辑控制策略的研究与仿真 总被引:6,自引:0,他引:6
以四川汽车工业集团野马混合动力电动汽车设计要求为基础,提出了一种混合动力电动汽车模糊逻辑控制策略。这种策略通过对油耗和各排放参数动态地分配权重值确定出发动机的最佳转矩,然后再根据模糊控制原理,以电池SOC值、汽车驱动需求的输出转矩和电动机转速为模糊输入确定出发动机的实际输出转矩,最终实现整车油耗和排放的综合优化。通过在S imu link软件中搭建该控制策略的仿真模型并与基础的电力辅助控制策略相比较,证明了这种控制策略有利于整车运行经济性和环保性的提高。 相似文献
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C. W. Park H. C. Oh S. D. Kim H. S. Kim S. Y. Lee C. S. Bae 《International Journal of Automotive Technology》2014,15(4):525-533
To comply with reinforced emission regulations for harmful exhaust gases, including carbon dioxide (CO2) emitted as a greenhouse gas, improved technologies for reducing CO2 and fuel consumption are being developed. Stable lean combustion, which has the advantage of improved fuel economy and reduced emission levels, can be achieved using a sprayguided-type direct-injection (DI) combustion system. The system comprises a centrally mounted injector and closely positioned spark plugs, which ensure the combustion reliability of a stratified mixture under ultra-lean conditions. The aim of this study is to investigate the combustion and emission characteristics of a lean-burn gasoline DI engine. At an excess air ratio of 4.0, approximately 23% improvement in fuel economy was achieved through optimal event timing, which was delayed for injection and advanced for ignition, compared to that under stoichiometric conditions, while NOx and HC emissions increased. The combustion characteristics of a stratified mixture in a spray-guided-type DI system were similar to those in DI diesel engines, resulting in smoke generation and difficulty in three-way catalystutilization. Although a different operating strategy might decrease fuel consumption, it will not be helpful in reducing NOx and smoke emissions; therefore, alternatives should be pursued to achieve compliance with emission regulations. 相似文献