Analysis and optimization of vehicle idle speed vibration
ZHOU Weiqiang
BAI Xiaoting
HU Junfeng
ZHANG Yan
LIN Xiaozhe
Abstract：To solve the problem of idle vibration during vehicle development and identify its causes,idle speed vibration tests and rotating component dynamic balance tests are carried out to analyze the impacts of rotating component dynamic balance and idle speed setting on vibration velocity.An optimization method is adopted by adjusting the dynamic balance and setting the idle speed to 700 r/min.The results show that the vibration velocity of the test point is not satisfied with the test requirement and the problem of idle vibration can not be solved when the spline of the dual clutch is assembled with the spline of the dual mass flywheel by rotating 180° degrees in the original state.The degree of vehicle vibration increases with the rise of idle speed.When the vibration frequency corresponding to the idle speed is close to the rigid body modal frequency of the vehicle powertrain,the vehicle vibration becomes more obvious.When the idle speed is adjusted to 700 r/min,the corresponding vibration frequency is 11.7 Hz,and the vibration velocity at the measuring points meets the test requirements,which is the optimal solution.
Keywords：automatic transmissionidle speedidle vibrationvibration test
Publication Date：2025-11-30
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：5( 92-96 )