摩托车碰撞模型的研究性评估和分析——ISO 13232标准应用研究

随着ISO13232-2005摩托车碰撞系列标准的发布,为评估摩托车产品影响人身和车辆安全考核提供了重要的参考依据。该标准不仅提高了摩托车产品对骑乘人员防护水平的认知,也促进了摩托车产品安全技术的不断提升。本文仅从摩托车碰撞实体模型建立方面,参考ISO13232-2005标准中碰撞试验模型及国际上部分关于摩托车公开碰撞的资料,结合实际检验工作需要,设定了可行性二轮摩托车碰撞模型。     

汽车和摩托车的节油研究

分析了汽车和摩托车车辆本身的结构型式和技术性能与燃油消耗的关系 ,其中包括车辆自身质量、传动效率、空气阻力、滚动阻力以及所配用发动机的结构型式、点火系统、压缩比及配气系统的充气效率等 ;并阐述了提高驾驶水平并保持车况良好也是节油不可忽视的方面。     

摩托车与汽车侧面碰撞计算机仿真

综合运用IDEAS软件和碰撞有限元软件PAM／CRASH来模拟汽车与摩托车发生侧面碰撞的两种典型形态，通过模拟来再现汽车与摩托车侧面碰撞的运动情况，对仿真结果与实验结果相比较来进行分析，从而得出影响仿真结果真实性的相关因素。     

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在分析汕头市摩托车出行特征的基础上，探讨了摩托车交通存在的问题，指出在城市交通中其出行特性较差，提出了详细的解决策略，并对汕头市城乡一体化的公共交通服务体系规划做了一些探讨，对类似城市摩托车交通问题的解决具有借鉴作用。     

Chatter vibrations of high-performance motorcycles

Motorcycle racing teams occasionally experience speed-limiting vibrations of around 25 Hz frequency in mid-corner. The nature of the vibrations has not been closely defined yet and the mechanics are currently not properly understood. Conventional motorcycle-dynamics models are shown here to reveal the existence of a vibration mode that aligns with the experience being referred to, suggesting some explanations. Root loci for variations in speed or cornering vigour, demonstrating modal characteristics for small perturbations from trim states, are employed to indicate how the mode responds to changes in operation and design. Modal participation is examined for a lightly damped case. Influences on the natural frequency and damping of the mode are found and a way of stabilising the mode is suggested.     

浅谈欧洲混合动力摩托车的测试要求

欧洲对于交通运输业产生的排放污染物影响非常关注,大多数摩托车生产企业都在开发各种新产品和采用新技术来应对严格的法规要求并减少对环境的污染,其中一项技术就是混合动力技术,该项技术已在乘用车上成熟应用.欧洲最新修订指令2009/108/EC详细规定了针对混合动力摩托车进行排放和噪声测试的特殊要求.     

摩托车燃油蒸发炭罐控制技术研究

针对摩托车国Ⅲ燃油蒸发排放标准要求,以豪豹HB125摩托车为试验样车进行燃油蒸发炭罐控制系统的设计研究。结果表明,所设计的燃油蒸发炭罐控制系统不仅能较大程度地降低燃油蒸发排放水平,满足国Ⅲ燃油蒸发标准要求,其尾气排放也满足国Ⅲ排放标准要求。     

Motorcycle suspension design using matrix inequalities and passivity constraints

This paper presents a design methodology for the suspension system of a novel aerodynamically efficient motorcycle. Since the machine’s layout and the rider’s seating position are unconventional, several aspects of the machine design, including the suspension, must be reviewed afresh. The design process is based on matrix inequalities that are used to optimise a road-grip objective function – others could be used equally well. The design problem is cast as the minimisation of an H ₂ cost with passivity constraints imposed on the suspension transference. The resulting bilinear matrix inequality problem is solved using a locally optimal iterative algorithm. The matrix inequality-type characterisation of positive real functions permits the optimisation of the suspension system over an entire class of passive admittances. Torsional springs, dampers and inerters are then used to construct networks corresponding to the optimal (positive real) admittances. Networks of first, second, third and fourth orders are considered, and an argument based on the compromise between complexity and improved grip is made for the most suitable suspension configuration. Finally, the effects of improved road grip on the stability of the vehicle’s lateral dynamics are analysed.     

JS250沙滩车的排放治理

对于JS250沙滩车采用新型号化油器优化 催化剂 二次补气的排放治理方案后和原车相比,可使CO降幅62％;HC降幅61％,基本满足了欧标法规要求,此方法是国内外应用研究的少有案例。