一辆沈飞客车(后置 6110发动机),因转向助力泵轴上的半圆键损坏而失去转向助力作用。修复后,随着发动机的起动,其助力系统发出“呜呜”的啸叫声,并随发动机转速的提高而加剧。在车下检查,发现油泵至转向器间的高压油管(铜管)产生高频率的振动,好像是异响的声源。操作转向盘原地转向及行驶中转向,除了令人烦躁的异响声增大外,助力作用却无异常。 A ShenFei passenger car (rear 6110 engine), due to steering power shaft damage on the semicircle and lost steering assistance. After the repair, as the engine starts, its boosting system gives a whining whistle and intensifies as the engine speed increases. Under the car check and found that the pump to the steering gear between the high-pressure tubing (brass) to produce high-frequency vibration, it seems abnormal sound source. Steering steering wheel steering and steering in place, in addition to annoying abnormal noise increases, the power without exception.