The invention discloses a straight driving and steering cooperative control strategy for a pure hydraulic drive slip steering vehicle, which comprises the following steps of: when the opening degree of an accelerator is greater than a critical accelerator opening degree and the working rotating speed of an engine is greater than the corresponding rotating speed of a maximum torque working point, adjusting the displacement of a motor to enable the vehicle to run normally; when the accelerator opening degree is larger than the critical accelerator opening degree and the working rotating speed of the engine is smaller than the corresponding rotating speed of the maximum torque working point, the pump displacement is adjusted to enable the vehicle to run normally; and when the accelerator opening degree is smaller than the critical accelerator opening degree and the working rotating speed of the engine is smaller than the corresponding rotating speed of the maximum torque working point, warning information that steering is not supported is sent out. On the basis of considering the steering load change, the straight driving loop speed ratio in the transmission system is controlled by adjusting the displacement of the pump and the motor in the straight driving loop, the problems of stalling and engine flameout in the steering process of a pure hydraulic drive slippage steering vehicle can be avoided, and the steering safety of the vehicle is improved.
本发明公开了一种纯液压驱动滑移转向车辆直驶转向协同控制策略,包括以下步骤:当油门开度大于临界油门开度且发动机工作转速大于所对应的最大转矩工作点转速时,调整马达排量使车辆正常行驶;当油门开度大于临界油门开度且发动机工作转速小于所对应的最大转矩工作点转速时,调整泵排量使车辆正常行驶;当油门开度小于临界油门开度且发动机工作转速小于所对应的最大转矩工作点转速时,发出不支持转向警示信息。本发明在考虑转向负载变化的基础上,通过对直驶回路中泵和马达的排量调整控制传动系统中直驶回路速比,能够避免纯液压驱动滑移转向车辆在转向过程中失速、发动机熄火的问题,提高车辆转向安全性。
Cooperative control strategy for straight driving and steering of pure hydraulic drive sliding steering vehicle
一种纯液压驱动滑移转向车辆直驶转向协同控制策略
05.03.2024
Patent
Elektronische Ressource
Chinesisch
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