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为改善液力变矩器的闭锁品质,对某车用综合式液力变矩器闭锁点进行了优化。综合考虑闭锁前后涡轮输出转矩变化与发动机惯性能量释放对闭锁品质的影响,采用目标规划的思想,研究了在不同涡轮转速下闭锁时涡轮转矩变化和发动机惯性能量释放两方面对闭锁品质的不同贡献量,对以往统一目标函数法进行修正,提出一种基于权重的统一目标函数,并基于此方法确定了闭锁点。基于Maylab/Simdriveline建立了某液力变矩器的闭锁性能仿真模型,并进行仿真计算。仿真结果表明,优化后的闭锁点较以往方法设计的闭锁点更为合理。
In order to improve the locking quality of the torque converter, the closing point of a vehicle integrated torque converter was optimized. Considering the influence of turbine output torque change and engine inertial energy release on lockout quality before and after lockout, the idea of target planning was used to study the effect of lock torque on the change of turbine torque and engine inertial energy release at different turbine speeds Different contributions, to amend the previous unified objective function method, a weight-based unified objective function is proposed, and the blocking point is determined based on this method. Based on Maylab / Simdriveline, a simulation model of lock-up performance of a hydraulic torque converter was established and simulated. The simulation results show that the optimized blocking point is more reasonable than the blocking point designed in the past.