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以某型号工程车辆为研究对象,针对其工况特点,以闭锁控制原理为基础,计算并选择在不同油门开度下的常用闭锁点。以油门开度和涡轮转速为基础,以制动信号、档位信号和冷却水温度信号为辅助,设计了多参数闭锁控制策略,并建立了相应的闭锁流程。运用MATLAB/Simulink软件建立了由闭锁控制模型、发动机模型、液力变矩器模型、液力变矩器输出模型、变速箱模型和外界阻力模型组成的整车模型,并对整车模型进行仿真。仿真结果表明:闭锁信号能对水温与档位信号做出正确响应,车辆在设定的闭锁点处实现闭锁;闭锁控制模型符合制定的闭锁控制策略,且其传动系统的输出模型符合实际工况,为车辆的闭锁控制提供了理论依据,也为车辆传动效率的提高与车辆节能减排提供了一种新方案。
Taking a certain type of engineering vehicle as the research object, according to the characteristics of its working conditions, based on the principle of lockout control, the commonly used locking points under different throttle opening degrees are calculated and selected. Based on the accelerator opening and the turbine speed, a multi-parameter lockout control strategy is designed based on the brake signal, gear signal and cooling water temperature signal, and a corresponding lockout flow is established. Using MATLAB / Simulink software, a complete vehicle model consisting of a closed-loop control model, an engine model, a torque converter model, a torque converter output model, a gearbox model and an external resistance model is established and the vehicle model is simulated . The simulation results show that the locking signal can correctly respond to the water temperature and the gear signal, and the vehicle can be locked at the set locking point. The locking control model accords with the established locking control strategy and the output model of the transmission system conforms to the actual working condition , Which provides a theoretical basis for the vehicle’s locking control and provides a new solution for improving the transmission efficiency of the vehicle and reducing energy consumption and emission of the vehicle.