Overview of the Balanced Suspension Patents

Background: The suspension has the role of transmitting and carrying the forces and moments between the wheels and the frame and controlling the wheel runout, thus providing the car with good comfort and operational stability. Objective: Through the analysis of the current situation of suspension research, summarize the research route and specific technical solutions of suspension patents, and finally prospect the future development direction of suspension, which can provide readers with certain reference value. Methods: The existing suspensions are classified into passive suspensions, semi-active suspensions, and active suspensions, and their improvement methods are described to compare the advantages and disadvantages of different improvement methods. Results: By comparing the results of suspension studies, semi-active suspension can effectively improve the smoothness and handling stability of the vehicle. Semi-active suspension has the advantages of low energy consumption, simple control, lower cost, easy implementation, and high reliability, while the effect of vibration control can be close to active suspension to some extent and far better than passive suspension. Conclusion: This paper introduces passive suspension, semi-active suspension, and active suspension in three categories and describes the working principle, functions, problem-solving advantages, and shortcomings of the three suspensions, respectively. Semi-active suspension is more suitable for the future development trend of suspension.