增加发动机功率的常规招数(下)

气门改装的原则是：在不影响强度的情况下尽可能地减轻气门的重量。气门是高性能发动机的基本要件,专业改装厂通常会提供不同的气门组合供消费者选择,发动机改装项目越多,对气门机构精确度的要求就越严格,所以设定气门时必须要同时考虑与凸轮轴及气门摇臂的配合。     

三足鼎立 经典老爷车对决

40多年前,Triumph TR5,Porsche 911和Alfa Romeo GTV纷纷使出自己的浑身解数,想在动力、天生的竞技综合能力以及人们所接受的1960年代车型风格等方面拔得头筹。如今,哪一台车值得装进你的车库中呢?     

帕萨特B5轿车维修后怠速抖动

一辆帕萨特B5 GSi 1．8T轿车,因交通事故造成前部严重受损,维修时更换了前围板、散热器、风扇、曲轴V形带盘、正时同步带、凸轮轴罩盖、凸轮轴霍尔传感器等零件,并进行了整形修复。修复后试车时,出现发动机在怠速工况时明显发抖的现象。     

输送带驱动链轮的维修

在秦皇岛港杂货分公司散粮站,进仓传送带驱动链轮链条运行时间长,工作载荷大,长期暴露在外,经常出现胶链、跳齿、崩断等现象,导致链轮装置运转故障频繁发生,严重影响生产.     

上海通用凯越轿车变速器故障一例

故障现象:一辆别克凯越轿车,搭载1．8L双顶置凸轮轴发动机,装备ZF4HP-16型自动变速器。事故修复后,出现变速器不能正常工作的现象。此车变速器外壳被撞破,阀体部分损坏。维修中更换了变速器外壳和阀体总成。装配完毕后试车,刚开始跳挡运行一切正常,试车将近50km后,车速以160km／h的速度行驶时, 车辆突然抖动了一下,车速表回零不再指示,仪表“HOLD”指示灯闪亮。马上减速停车并再次启动,“HOLD”指示灯依然闪     

A New Type of Continuously Variable Displacement Mechanism Used for Hydraulic Motors

A continuously variable displacement mechanism, which is composed of a hydraulic control valve with mechanical-positional feedback to camshaft, was designed for changing the displacement of traditional camshaft connecting-rod low speed high torque (LSHT) hydraulic motor continuously. The new type of continuously variable displacement mechanism is simple and easy to be made. The structure and principle of a continuously variable displacement mechanism was introduced. The mathematic model of the continuously variable displacement mechanism was set up and its static and dynamic characteristics were analyzed with the help of computer simulation. It can be seen that the cam ring on camshaft of the traditional LSHT hydraulic motor can stop at any position between minimum and maximum eccentricity, according to an input fluid pressure signal. And it can also stay anywhere stably through self-adjusting. Besides, it can work stabilized when load impact or oil leakage exists.     

改装后电表校准时控制电路的选择及安排

对改装后的电表进行校准时控制电路有2种选择:制流式和分压式。究竟应该选择哪一种,各种教材和资料均没有明确说明,为了解决这一问题,在多年教学经验的基础上,分析总结控制电路的性能和特点,并结合实验室实际条件,得出改装后的电表校准时控制电路的选择及安排方法。     

阀位指示器及其指示调节

简要叙述了浸液式液压驱动蝶阀阀位指示器的主要结构及工作原理,并介绍了阀位指示器正确调节方法。