5속 수동 트랜스미션의 전달오차 예측에 관한 연구

Abstract

For the manual transmission gearbox used in the automotive industry, gear meshing transmission error is themain source of noise known as gear whine, and radiated gear whine noise plays an important role in the wholegearbox. Therefore, in order to keep competitive in the automotive market, the NVH performance of transmissiongearboxes is increasingly important for automotive manufacturers when a new product is developed. In thispaper, in order to achieve an optimized tooth contact pattern, gear tooth modification is applied to make up forthe deformation of the teeth owing to load. A five-speed MT gearbox is firstly modeled in RomaxDesignsoftware and the prediction of transmission error under the loaded torques is studied and compared. From thesimulation, the transmission error and maximum contact stress are also simulated and compared after toothmodification of the loaded torques. Finally, the simulation results are used to optimize the whole gearbox designand the final gearbox prototype is testified to obtain NVH performance in a semi-anechoic room.