In the world of automobiles, the suspension system plays a vital role. It not only ensures a smooth ride but also contributes to driving pleasure and safety performance.
The suspension system acts as a bridge between the wheels and the vehicle body, ingeniously absorbing the impact of uneven road surfaces to protect passengers from discomfort. It is also responsible for maintaining effective tire contact with the road, ensuring vehicle stability during maneuvers.
It is important to note that the design and tuning of the suspension system directly impact the performance of the car. For instance, non-independent suspension systems, known for their simplicity, high strength, and compact size, are commonly used in commercial vehicles. Yiwei Motors has also adopted this type of suspension system.
Steel Plate Spring Suspension System:
The design of a steel plate spring suspension system is a complex engineering task that involves multiple considerations, including providing support, cushioning, and stability, as well as balancing handling
and comfort.
Key aspects of the design of a steel plate spring suspension system include:
1. Ensuring good ride smoothness (riding comfort) by having appropriate stiffness in the suspension to provide the right amount of frequency bias and suitable vibration performance (damping characteristics) while keeping the unsprung mass low.
2. Ensuring good handling stability and having some understeer characteristics.
3. Minimizing pitch angle during braking (mainly related to the design stiffness of the main leaf).
The basic design steps for a steel plate spring suspension system are as follows:
1. Selecting the appropriate frequency bias based on the vehicle’s positioning.
2. Calculating the spring stiffness.
3. Determining the stiffness distribution of the main and auxiliary springs.
4. Verifying the compliance of the stiffness and frequency bias design through reverse checking.
5. Selecting suitable materials based on the stress of the leaf springs.
6. Calculating the roll stiffness of the suspension.
7. Designing matching shock absorbers.
Optimization Methods for Yiwei Motors’ Suspension System:
1. Creating a virtual prototype model of the suspension using ADAMS/CAR and conducting simulations.
2. Simulation and benchmark data comparison: By comparing simulation results with benchmark data, the accuracy of the model can be verified, and adjustments can be made to parameters that do not meet the requirements. For example, the kingpin inclination angle and caster angle are important parameters that affect vehicle handling and need to be optimized to meet design requirements.
3. Iterative improvement: Based on simulation results and subjective evaluations, the suspension design is iteratively improved until all performance requirements are met.
4. Real-world application: The final design of the suspension system needs to be tested on actual vehicles to validate its performance under real driving conditions.
Yiwei Motors’ Testing on Mountain Roads:
In conclusion, the design of an automobile’s suspension system not only considers the basic driving requirements of the vehicle but also takes into account handling, comfort, and safety. Yiwei Motors, through continuous simulation, testing, and optimization, is dedicated to creating efficient and comfortable suspension systems that enhance the driving experience and product performance for its customers.
Chengdu Yiwei New Energy Automobile Co., Ltd is a high-tech enterprise focusing on electric chassis development, vehicle control unit, electric motor, motor controller, battery pack, and intelligent network information technology of EV.
Contact us:
yanjing@1vtruck.com +(86)13921093681
duanqianyun@1vtruck.com +(86)13060058315
liyan@1vtruck.com +(86)18200390258
Post time: Apr-02-2024
