维修俱乐部·车迷热线

MTC先生： 您好！我是《摩托车》杂志的忠实读者，现有几个问题请教。 1.摩托车的功率和扭矩之间有什么量的关系？ 2.关闭阻风门启动发动机预热2min后，阻风门拨回一点，但未全开，这时能骑行吗？     

奥迪Q7发动机废气监控系统警报灯亮

车型:4LB 0ZA。VIN:WAUAGD4LXBD××××××。里程:30512km。故障现象:该车发动机废气监控系统警报灯亮。故障诊断:诊断仪检测结果如图1～图4所不。这是一例典型的进气管风门真空控制元件膜片漏气导致的故障案例,只是更换损坏件后故障现象仍未消除,故障码发生了以下变化,如图5所示。进气管风门位置由以前的"在关闭位置卡住"变成现在的"卡在开启位置"了。启动发动机,快速踩踏加速踏板,能见到进气管风门控制执行元件活动     

奔驰E200空调不制冷

行驶里程:40000km. 故障现象:一辆奔驰E200,客户反映最近空调不制冷,并且中间两个出风口不出风,两边的出风口出热风. 故障诊断:接车后启动着车,操作空调按钮,均能正常操作,仪表无任何报警.现象确如客户所说,无论怎么操作出风模式,中间两个出风口也不能出风,两边的出风口一直出热风.     

自动阻风门常见故障的维修和安装方法

我国进口的汽车中装配V—8发动机的车型,都装有自动阻风门,它可以改善汽车的起动性能,确保车辆的经济性和排气净化。自动阻风门有排气加热式和电加热式。自动阻风门最常见的故障是加热器管被堵塞,因此,应重点查看双金属热敏弹簧在加热时能否开启阻风门,否则,应予以清洗。双金属热敏弹簧的破裂,变形也会导致阻风门不能平顺地开启,这就应更换双金属热敏弹簧。此外,还有自动阻风门瓣片或阀被粘住;双金属热敏弹簧软弱;发动机起动     

LS430轿车自动空调系统故障诊断与维修

三、部件检查与维修1．环境温度传感器1)拆下散热器格栅，拔下环境温度传感器插接器。     

Research on low-frequency mechanical characteristics of the MR dampers in ship isolators

A new isolator composed of a steel rope spring and a magneto-rheological （MR） damper was designed and a study on low-frequency mechanical characteristics of MR dampers in isolators was carried out. It used the characteristics of the MR damper, such as fast response, controllable damping, small energy consumption, wide dynamic scope, and great adaptation. The relationships between MR damping forces and influencing factors were analyzed based on experimental data. The results show that damping force is not only related to structural dimensions, but also closely related to controllable current and vibration frequency. Finally, the empirical formula for damping forces was corrected, and the relationship between correction coefficients and factors analyzed.