共查询到17条相似文献，搜索用时 281 毫秒
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从汽车使用的角度研究节油措施。运用发动机原理、汽车理论等基础知识,通过对汽车启动、起步过程中发动机温度、负荷对燃油消耗影响的分析,规范了汽车启动、起步操作,强调电控燃油喷射发动机的启动不能踩油门,否则会加大燃油消耗;将汽车起步过程的离合器踏板控制过程规范为快-慢-快3个阶段：指出车辆低档、低速行驶比发动机无负荷高速运转更能缩短发动机热车时间,节油效果更好;明确了商务车空载二档起步可以节油,而乘用车采用一档起步才能节油的机理。 相似文献
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利用车辆经济性与动力性软件CRUISE,根据FJ1004 智能无人驾驶拖拉机的动力传动系统搭建了整车模型,通过柴油机的特性曲线分析匹配动力特性,依据工况特征加载拖挂特性,模拟机具消耗。通过工况仿真分析了拖拉机整车的动力性与经济性,与实验数据对比分析,最高车速误差为-0.76%;犁耕油耗和旋耕油耗误差分别为-1.2%和-1.3%。最后通过分析柴油AMT 拖拉机工作特性,结合MIGA 算法对换挡策略进行优化,确定最优功率和燃油经济性的换挡规律,在田间转移工况下油耗优化9.21%;在保证需求动力性的轻负载作业工况下油耗优化1.28%。为后续自适应工况换挡策略提供参考与优化方向。 相似文献
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自动变速中单向离合器的检修 总被引：1，自引：0，他引：1
单向离合器具有结构简单、反应快捷、使用可靠等特点,在现代自动变速器中广泛使用单向离合器进行换挡控制,本文就自动变速器中使用的单向离合器的结构、类型、工作原理和检修等进行论述。 相似文献
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万有特性曲线是具有多参数的特性曲线,最内层的等燃油消耗率曲线是最经济的区域,耗油率最低。曲线愈向外,经济性愈差,从中很容易找出最经济的负荷和转速。利用Matlab软件,建立了发动机特性模型,绘制了发动机的万有特性曲线,以汽车原地起步换挡加速时间和等速行驶工况燃油消耗作为衡量动力性和燃油经济性的目标,分别建立动力性目标函数和经济性目标函数。采用线性加权组合的方法将两个分目标函数转换成单一目标函数。结果表明:采用Matlab软件进行优化计算,找到最优的加权因子即得到动力性与经济性的最佳优化匹配方案,曲线结果准确可靠。 相似文献
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对某款搭载DCT(Double clutch transmission,双离合器自动变速器)的车型在试验场按不同工况进行实车试验,使用两个加速度传感器采集DCT关键部位的振动载荷谱,对采集的信号数据进行处理分析.结果显示:DCT最大振动加速度达到10.37 g,为DCT及其主要零部件结构的CAE分析提供真实可靠的输入边界,对建立DCT载荷谱数据库有重要意义. 相似文献
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以提高车辆燃油经济性为目的,对VDS-6120车型的爬坡度、动力因子、行驶加速度、起步换挡时间、驱动力等性能参数以及整车行驶综合工况下经济性能进行验算,结合动力性分析数据对计算结果进行分析．结果表明：VDS-6120车型各项动力性能均达到国家标准要求,个别指标甚至远超市场同类车型,同时车型在模拟综合工况下行驶的经济性也达到了车辆设计初期预设的目标． 相似文献
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在评价和研究车辆燃油消耗和污染物排放量时,车辆的运行工况是关键的技术要素.文章针对不同的车型和用途,研究了不同的测试工况,并对测试工况的开发、主要工况的特征及具体的应用进行了分析. 相似文献
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离合器是手动变速汽车的重要总成,它的好坏关系着汽车能否顺利起步和平稳换挡。本文主要研究北京现代轿车离合器异响故障实例,对其进行分析和解决。对使用和维护汽车有着很现实的意义。 相似文献
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基于雷达数据分析,分离有效飞行航迹,并识别航空器飞行状态。根据航空器参考速度反推初始航空器质量,考虑了航空器质量动态变化,建立了不同飞行模式下航空器燃油消耗算法。开发终端区多航空器燃油估算软件,并通过某机场进离场雷达数据验证燃油消耗算法,结果表明终端区多航空器燃油估算算法可以宏观测算终端区进离场航空器燃油消耗水平。 相似文献
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宋峰 《淮北职业技术学院学报》2015,(1):139-140
提出了新的内燃机车燃油(柴油)考核理念和办法(区别于现有的万吨公里耗油量),通过细致的班班考核,用实际消耗的燃油量(L)真实地反映调度人员的调度水平和乘务人员的机车操纵水平,并对参与燃油使用的工作人员单独奖惩,促进其积极自主地节约材料,降低燃油消耗。 相似文献
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莫舒玥 《南宁职业技术学院学报》2014,(4):93-96
相对于目前在规定道路下进行一定条件限制的等速油耗试验,采用底盘测功机进行汽车燃油经济性试验更科学。由于采用计算机模拟道路、气候、风速、湿度等客观试验条件,确保试验的过程更接近真实车辆使用情况,获得的油耗也更接近实际。对底盘测功机台架试验中模拟各种实际行车路况和环境的计算机系统进行开发,并进行车辆在底盘测功机上的燃油经济性试验,利用计算机系统模拟一般道路状况下车辆的等速行驶,并对油耗进行统计。试验结果表明,这种方法具有很强的可操作性,可作为一般企业或检测机构进行油耗试验的首选方法。 相似文献
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Aiming to reduce fuel consumption and emissions of a dual-clutch hybrid electric vehicle during cold start, multi- objective optimization for fuel consumption and HC/CO emission from a TWC （three-way catalytic converter） outlet is presented in this paper. DP （dynamic programming） considering dual-state variables is proposed based on the Belhnan optimality principle. Both the battery SOC （state of charge） and the temperature of TWC monolith are considered in the algorithm simultaneously. In this way the global optimal control strategy and the Pareto optimal solution of multi-objective function are derived. Simulation results show that the proposed method is able to promote the TWC light-off significantly by decreasing the engine＇s load and improving exhaust temperature from the outlet of the engine, in comparison with original DP considering the single battery SOC. Compared to the results achieved by rule-based control strategy, fuel economy and emission of TWC outlet for cold start are optimized comprehensively. Each indicator of Pareto solution set shows the significant improvement. 相似文献
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To fully take advantage of external charging conditions and reduce fuel consumption for extended-range electric vehicles, a charging management-based intelligent control strategy is proposed. The intelligent control strategy is applied to different driving patterns based on the various characteristics of urban roads. When the vehicle is driving on arterial roads, a constant power control strategy is applied. When the driver decides to go to a charging station, the extender-off time can be determined based on the current state of the vehicle and the distance to the charging station. When the vehicle is driving on an expressway, a power follower control strategy is applied. The range-extender engine is controlled to work over a wide variety of regions to obtain optimum fuel economy. The simulation results indicate that as the vehicle arrives at the charging station, the proposed charging management-based intelligent control strategy has made the state of charge reach the lowest permissible level after the driver made the decision to charge at the charging station. Therefore, the driver can charge the vehicle with as much clean electric energy as possible from the charging station. 相似文献
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For a single-motor parallel hybrid electric vehicle, during mode transitions （especially the transition from electric drive mode to engine/parallel drive mode, which requires the clutch engagement）, the drivability of the vehicle will be signifi- cantly affected by a clutch torque induced disturbance, driveline oscillations and jerks which can occur without adequate controls. To improve vehicle drivability during mode transitions for a single-motor parallel hybrid electric vehicle, two controllers are proposed. The first controller is the engine-side controller for engine cranking/starting and speed synchronization. The second controller is the motor-side controller for achieving a smooth mode transition with reduced driveline oscillations and jerks under the clutch torque induced disturbance and system uncertainties. The controllers are all composed of a feed-forward control and a robust feedback control. The robust controllers are designed by using the mu synthesis method. In the design process, control- oriented system models that take account of various parameter uncertainties and un-modeled dynamics are used. The results of the simulation demonstrate the effectiveness of the proposed control algorithms. 相似文献
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Desktop calibration of automatic transmission （AT） is a method which can reduce cost, enhance efficiency and shorten the development periods of a vehicle effectively. We primary introduced the principle and approach of desktop calibration of AT based on the condition of coupling characteristics between engine and torque converter and obtained right point exactly. It is shown to agree with experimental measurements reasonably well. It was used in different applications abroad based on AT technology and achieved a good performance of the vehicle compared with traditional AT technology which primary focuses on the drivability, performance and fuel consumption. 相似文献
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广东省经济欠发达地区居民的体育消费整体水平还处在初级阶段。但居民体育消费在悄然增长,且在家庭消费支出中的比重越来越大;不同档次的体育消费群体已初见层次化格局的特点;实物性体育消费仍占主导地位,非实物性体育消费呈上升趋势。针对该地区体育消费的特点,提出了推动其体育消费的若干建议。 相似文献