新型动力换挡式变速系统换挡过程建模及优化

为了能够继承双离合变速器动力换挡的优点,并利用有限齿轮对数实现更多的速比,提出了一种新型动力换挡式自动变速系统.在对其结构和换挡过程进行深入分析的基础上,建立了基于整车应用的传动系统动态仿真模型,包括换挡动力学模型和控制模型；并对影响换挡品质的换挡控制参数进行了分析和优化；最后,以连续升档为例,利用仿真模型对新型变速系统的换挡性能进行了仿真验证.研究结果表明:该新型动力换挡式自动变速系统不仅可通过n+m对定轴齿轮副实现2(n+m)种不同的速比,而且能较好地实现动力换挡.

Modeling and Optimization of Shift Process of a Novel Power Shift Transmission

Proposed in this paper is a novel power shift transmission that inherits the advantages of power shift of dual-clutch transmission and achieves more speed ratios with limited gear pairs.Then,based on further analyses of the structure and the mechanism of the transmission,a dynamic simulation model containing the shift dynamics models and the shift control models is established for the vehicle drive system,and the factors affecting the shift quality are analyzed and optimized.Moreover,in order to verify the shift performance,the proposed simulation model is applied to the successive upshift of the transmission.The results show that the novel power shift transmi-ssion not only achieves 2(n+m) speed ratios with n+m fixed-axis gear pairs but also ensures high power shift quality.