According to the principle of multi-body dynamics, using ADAMS module of ADAMS/CAR to form a complete vehicle model, and by using INSIGHT module used to design suspension hard point, the simulation analysis was carried out. Controllability and stability of the vehicle is to make evaluation and analysis by the experiments cornering with steer release. Ordinal optimization of before and after the optimization model , the results were analyzed, it demonstrated that optimized score significantly higher than before optimization.

No abstract

A method of wheel load variation simulation for automobile ABS performance test bench is presented in the paper. To simulate the wheel load variation of the detected vehicle, the wheel placement angle on the rollers can be changed by adjusting the wheelbase between the ABS performance test bench’s two rollers, which support the same wheel. Equivalent wheel load is defined to reflect wheel load variation simulation, and the relationship among the equivalent wheel load, roller adhesion coefficient and wheel placement angle is also be analyzed. The simulation results show that the equivalent wheel load is not only can greater than wheel load many times, but also can less than wheel load. The minimum equivalent wheel load is determined by the critical wheel placement angle.

In this paper, a new automatic variable transmission (AVT) is studied. This AVT is made up of two parts, which include the metal belt continuously variable transmission (CVT) and gear transmission. And the CVT mode is used in the low speed and the gear transmission is used in the high speed. The software ofsimulationXis used to build a simulation model for the AVT vehicle, and the system dynamics characteristics of AVT are studied via this model. Compared to the CVT vehicle in terms of the maximum speed, the accelerate time and fuel consumption, the AVT vehicle develops the advantage of CVT in the low load and improves the weakness of low power in the high load. The results of this paper show that the AVT vehicle has good dynamics performance at the whole work area, which can advance the transmission efficiency and improve the fuel economy of the vehicle.

Automatic Variable Transmission (AVT) is composed of a metal belt CVT unit and a step speed changing transmission component. According to the needs of automotive conditions, AVT can realize continuously variable transmission and gear transmission, which not only play the advantage of gear transmission efficiency, but also overcome the deficiency of CVT when it is in high-speed. In the paper, the transmission matching rule is introduced, and engine model is established using engine test data. Based on SimulationX software, a vehicle that equips AVT is used for modeling and simulation. Finally the power matching is researched.