Abstract: To find the parameters of occupant restraint system having significant effects on car-to-car oblique crash, the models for driver's restraint system of SUV,mid-size car and compact car are created. The uniform Latin hypercube sampling is used for the design of experiment and T-test is utilized to get the sensitive factor of different types of vehicle in car-to-car oblique crash, based on which an optimization is conducted on restraint system with consideration of crash compatibility. The results show that the sensitive factors for three types of vehicle are roughly the same in car-to-car oblique crash. Compared with the optimization on each vehicle separately, the optimization with minimizing the sum of WIC value of both vehicles involved in crash as objective can not only effectively reduce the injury values of both vehicles, but also get better crash compatibility. Although the optimization trends of restraint system parameters for different vehicles are different, there are still some common features, i.e. optimization tends to increase the mass flow of airbag and reduce the force limit of seatbelt

Key words: oblique crash, sensitive factors, parameters optimization, crash compatibility