Notice of Retraction Design of system pressure valve of 8-speed automatic transmission

System pressure valve is very important for the performance of 8-speed automatic transmission (8AT). The new system pressure valve of 8AT in front-wheel drive (FWD) is designed and simulated by ITI-SimulationX, its performance such as pressure and flow of system pressure valve were analyzed and optimized in a whole power train system including hydraulic system, mechanical system and control system. Because the model includes the interaction of all components from the different physical domains in whole power transmission system, this is very helpful for the performance optimization of system pressure valve in real application of 8-speed automatic transmission.