考虑滚动半径差异的适时四驱汽车限滑控制策略  

Limited Slip Control Strategy for On-Demand 4WD Vehicle Considering Rolling Radius Difference

作　　者：赵洋 刘元治 崔金龙 周泽慧 吴爱彬 Zhao Yang;Liu Yuanzhi;Cui Jinlong;Zhou Zehui;Wu Aibin(Global R&D Center,China FAW Corporation Limited,Changchun 130013;National Key Laboratory of Advanced Vehicle Integration and Control,Changchun 130013)

机构地区：[1]中国第一汽车股份有限公司研发总院,长春130013 [2]高端汽车集成与控制全国重点实验室,长春130013

出　　处：《汽车技术》2024年第6期37-44,共8页Automobile Technology

摘　　要：结合小备胎识别和轮速补偿技术,设计了基于前、后轴附着率相等的限滑前馈控制和基于轴速差的限滑反馈控制,搭建了适时四驱汽车动力学仿真平台,对小备胎识别、轮速补偿、限滑控制的有效性进行了验证。实现了适时四驱汽车中央差速及差速限滑功能,提高了车辆的动力性和行驶稳定性,避免了因滚动半径差异导致的限滑控制功能误触发,解决了因备胎滚动半径小而导致的电控多片离合器异常磨损、烧蚀等问题。Combining spare wheel identification and wheel speed compensation,limited slip feedforward control based on equal utilizable friction coefficient on the front and the rear axle and limited slip feedback control based on axle speed difference were designed.And an on-demand 4WD vehicle dynamics simulation platform was built to verify the effectiveness of small spare tire identification,wheel speed compensation,and limited slip control.The strategy can achieve the central differential and differential slip limiting functions of on-demand 4WD vehicle,improve vehicle’s power performance and driving stability,avoid the error trigger of limited slip control caused by the difference in rolling radius,and solve the abnormal wear and ablation of the multiple-plate clutch caused by the small rolling radius of the spare tire.

关 键 词：适时四驱 限滑控制 扭矩分配 滚动半径差异 备胎识别轮速补偿 

分 类 号：U461.1[机械工程—车辆工程]