共查询到18条相似文献,搜索用时 78 毫秒
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探讨了建立发动机燃油经济性和排放性能模型、定义汽车运行循环、预测汽车动力性燃油经济性和排放性能,介绍了自主开发的VDS车辆动力学软件.通过实车道路和底盘测功机的性能试验对VDS软件进行验证. 相似文献
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探讨了建立发动机燃油经济性和排放性能模型、定义汽车运行循环、预测汽车动力性燃油经济性和排放性能,介绍了自主开发的VDS车辆动力学软件。通过实车道路和底盘测功机的性能试验对VDS软件进行验证。 相似文献
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探讨了建立发动机燃油经济性和排放性能模型、定义汽车运行循环、预测汽车动力性燃油经济性和排放性能,介绍了自主开发的VDS车辆动力学软件。通过实车道路和底盘测功机的性能试验对VDS软件进行验证。 相似文献
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郭昌伦 《机械工业标准化与质量》2011,(6):27-28
乙醇汽油汽车通过底盘测功机检测排放CO、CO2、HC,根据碳平衡法原理建立乙醇汽油燃料消耗量数学模型,计算出燃料消耗量.并通过乙醇汽油与汽油当量的体积比,直接将排放检测报告中的数据转化成乙醇汽油燃料消耗量. 相似文献
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B. J. Shim K. S. Park J. M. Koo S. H. Jin 《Journal of Mechanical Science and Technology》2014,28(2):755-761
In order to evaluate fuel consumption and tailpipe emission of a vehicle, standard driving cycles are used to prescribe vehicle driving condition such as speed, gear shift, fluid temperature and so on. New european driving cycle (NEDC) has prevailed as the only driving cycle for emission and fuel consumption while Federal Test Procedure 75(FTP-75) mode is used in the United States. In South Korea, NEDC is applied for emission certification and FTP-75 mode is used for fuel consumption of a vehicle powered by diesel engine. Because these driving cycles are mixed of static phase (cruising and idle) and transient phase (acceleration and deceleration), they need to be transformed to static engine operation condition so that optimization is possible using engine dynamometer for each representative engine operation condition. This study set up two models to convert vehicle driving conditions to engine operation condition based on work which the engine should produce to follow the driving cycle and based on representative vehicle speed of NEDC. Accuracy of each model was compared with actual vehicle test result on a chassis dynamometer and the characteristics of each model were analyzed. 相似文献
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Mooncheol Won Sung Soo Kim Byeong Bae Kang Hyuck Jin Jung 《Journal of Mechanical Science and Technology》2001,15(9):1248-1256
In this study, a test bed for vehicle longitudinal control is developed using a chassis dynamometer and real time 3-D graphics. The proposed test bed system consist of a chassis dynamometer on which test vehicle can run longitudinally, a video system that shows virtual driver view, and computer that control the test vehicle and realize the real time 3-D graphics. The purpose of the proposed system is to test vehicle longitudinal control and warning algorithms such as Adaptive Cruise Control (ACC), stop and go systems, and collision warning systems. For acceleration and deceleration situations which only need throttle movements, a vehicle longitudinal spacing control algorithm has been tested on the test bed. The spacing control algorithm has been designed based on sliding mode control and road grade estimation scheme which utilizes the vehicle engine torque map and gear shift information. 相似文献
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基于工业摄像技术提出一种非接触测量传动轴动态轴功率的方法。首先设计了轴功率测量系统,提出了测量轴转速和轴转矩的方法。通过数字散斑的相关搜索和亚像素计算等手段,测得轴转速和转矩值,最终计算得出轴功率。为验证本文方法的测量精度,搭建了车载试验系统,并在底盘测功机上对其进行了实际测量试验。试验结果表明:提出的轴功率测量方法得到的结果与底盘测功机测量结果变化趋势一致,其相对误差平均值为9.37%。其中轴转速的测量范围可以覆盖整个过程,测量值波动较小,与底盘测功机测量结果基本一致,其相对误差平均值为0.73%,抗噪能力强;轴转矩的测量范围可覆盖部分高转矩,测量值波动较大,两者测量结果趋势一致,其相对误差平均值为15.15%,抗噪能力较弱。本文方法克服了一些传统测量方法的不足,为解决轴功率动态测量提供了一种新思路。 相似文献
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电涡流缓速器是一种利用电磁场原理将汽车行驶的动能转化为热能散发掉,从而实现汽车减速和制动作用的辅助制动装置。在分析车用缓速器性能要求的基础上,提出了缓速器的底盘测功机模拟道路试验方法,并以电涡流缓速器为例介绍了试验过程,模拟了缓速器平路制动、恒速下坡试验,进行了速度-功率试验和拖磨试验。缓速器的底盘测功机试验方法克服了道路试验的缺点,是对缓速器台架试验方法的必要补充,有助于进一步研究和开发车用电涡流缓速器。 相似文献
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对某SUV车柴油机动力总成产生的异常振动进行了试验分析研究.在介绍柴油机动力总成振动基本分析方法的基础上,开展了整车道路及转鼓试验,进行了整车及台架条件下动力总成的振动模态试验.通过对动力总成的振动特性分析,找到了引起动力总成操纵手柄异常振动的原因:飞轮壳刚度偏低,动力总成系统固有频率落入柴油机工作转速的激励频率区间,... 相似文献