Diagnosis and Exclusion of Vibration Failure in High-speed Running of Automobile

First, there are two cases of high-speed oscillation. First, as the vehicle speed increases, the oscillation gradually becomes stronger; second, the oscillation occurs at a relatively high speed. When the steering wheel is shaken, the drive axle is firstly erected, the front wheel is added with a safety plug, the engine is started, and the engine is gradually shifted into the high gear, so that the drive wheel reaches the pendulum speed. If both the body and the steering wheel appear to fluctuate, the drive system will cause a runaway. Because the front axle front axle is at a standstill at this time, if it reaches the final test swing speed, the car will not appear jitter, then the reason for the vibration is that there is a fault in the front axle part of the car;

Second, check the front wheel each positioning angle and toe to meet the requirements, such as misalignment should be adjusted;

Third, set up the front axle test wheel, check the static balance of the wheel and whether the tire deformation is too large. If necessary, change the wheels for comparison test;

Fourth, check the front axle, frame deformation, check whether the drive shaft is bent, and if necessary, the dynamic balance of the drive shaft should be done;

5. Check the rigidity of the front leaf spring, the performance of the shock absorber, and the looseness of the spring bracket rivets. Replace the performance if it is not in compliance.