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目前,在中小型车辆液压制动系上普遍采用真空助力器(加力泵),它利用真空度(负压)为动力作为一类加力装置,提高了制动效果,对行车安全十分有利。但是,发现制动时踏了数脚,不见踏板升高,或是制动效果变差等现象时,修理人员一般对真空助力器、制动总泵、轮鼓间隙,进行认真检查,而往往忽视对真空管道的检查。真空管在外表上看上去似乎很好,实质上真空管的内壁已被吸瘪,管孔堵小,影响真空度。怎样来检查真空管的好坏呢?首先检查其
At present, the vacuum booster (force pump) is widely used in the hydraulic braking system of small and medium-sized vehicles. It uses vacuum degree (negative pressure) as a kind of force applying device to improve the braking effect and is very advantageous to driving safety . However, when it is found that the pedals are stepped on for several times without any increase of the pedals, or the braking effect is deteriorated, the repairmen generally check the vacuum booster, brake master cylinder and drum clearance frequently, and often Ignore the inspection of the vacuum pipe. Vacuum tube looks good in appearance, in fact, the inner wall of the vacuum tube has been sucked deflated tube hole blocking small, affecting the degree of vacuum. How to check the vacuum tube is good or bad? First check it