Abstract

Suspension friction has a great influence on ride comfort of vehicles, especially under the excitation road condition of micro-amplitude and high frequency. In this paper, McPherson suspension is taken as the analysis object, the mechanism and composition of suspension friction are analyzed, the suspension friction prediction model is established, and the contribution ratio of each part to the suspension friction is obtained. By comparing with the experimental value, the model prediction is in good agreement with the experimental value. At the same time, shock absorber friction whose contributions is biggest to suspension friction is optimized, study result shows that by reducing air surface angle and the interference fit of the oil seal lip, can significantly reduce friction force between oil seal and the piston rod, and, by optimizing the spring load axis angle, can significantly reduce the shock absorber lateral force, so as to reduce the friction force of shock absorber of reciprocating motion. Finally, the experimental evaluation results show that the decreasing trend of suspension friction is consistent with the predicted model. At the same time, the subjective evaluation results and objective measurement data after optimization of suspension friction shows that the ride comfort in high-frequency excitation road surface (3−20 Hz) has greatly improved.

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.