液力机械自动变速传动综合控制策略

Integrated Control Strategy of Hydraulic-mechanical Automatic Transmission

在液力机械自动变速传动分析及变矩器测试建模的基础上,研究了不同油门、不同档位下,采用液力传动和采用机械传动时AT轿车的牵引特性,建立了AT轿车动力性换档、经济性换档和综合性换档的控制策略,提出了液力变矩器闭、解锁控制策略,制定了液力变矩器闭锁离合器滑摩控制策略,在多工况条件下仿真分析了采用滑摩控制的液力机械自动变速传动综合控制效果。结果表明,其燃油经济性比未采用前提高2.36%。

Through the analysis of hydraulic-mechanical transmission and the modeling of torque converter, the traction performance of an automatic transmission car between hydraulic transmission and mechanical transmission under different throttle angle and different gears is discussed, and the control rule among dynamic gear-shifting, economic gear-shifting and mixed gear-shifting is made. Furthermore, the control strategy of engagement, disengagement and slip-control of lock-up clutch is set down. Simulation of integrated control of hydraulic-mechanical transmission which applies slip-control under multi-load-condition is carried out, and the result shows that the fuel economy of such type of the car gets an increase by 2.36%.