基于最小二乘法的自动变速器换挡规律求解方法研究

Research of Solving Methods of AT Shift Schedule Based on Least Square Algorithm

根据最小二乘法原理,结合发动机特性方程、车辆行驶特性方程和换挡特性方程,推导出自动变速器换挡规律求解数学模型。对实例进行仿真试验,结果表明,采用该求解方法得到的换挡规律能够很好地发挥车辆的最佳动力性和经济性,大大提高了工作效率,同时验证了该方法的有效性,为进一步提升整车使用性能提供重要的理论依据。

According to principle of Least Square Algorithm, AT shift schedule mathematical solving model is deduced by the combination with engine characteristic equation, vehicle driving characteristic equation and shifting characteristic equation. After the prototype is simulated, the results illustrate that shift schedule acquired by solving method can fully exert power and fuel economy performance, the working efficiency is greatly enhanced and the availability of the method is verified, which offers important theory basis for further improving service performance of the entire car.