What Causes Severe Vibration During Car Acceleration?
1 Answers
The main reasons for severe vibration during car acceleration are: 1. First, check whether the left and right half-shafts are bent. 2. Secondly, disassemble and inspect the inner walls of the left and right inner CV joints for wear and the presence of pits. In most cases, this is caused by damage to the inner CV joint. Additional Information: 1. Most modern cars have front-mounted engines and front-wheel drive, and their inner CV joints are often telescopic to accommodate changes in the relative positions of the transmission drive terminal and the drive wheels during vehicle movement. The inner walls of the inner CV joints, which frequently come into contact with the outer shells of the needle bearings—i.e., the torque transmission areas—often develop pits. 2. During rapid acceleration, the engine and transmission assembly undergoes slight lateral tilting, which shifts the point of force application. Since there is a certain angle between the axial direction of the half-shaft and the inner CV joint, this point of force application continuously moves back and forth along the axial direction as the CV joint rotates. The force generated by this movement pushes the car body alternately to the left and right, resulting in the vibration during acceleration. The solution is to replace the damaged inner CV joint or half-shaft.
