APP下载

重型商用车AMT坡度及载重识别策略

2018-09-10韩伟

韩伟

摘 要:提出基于汽车动力学原理的重型商用车AMT自动变速器坡度和载重识别策略.策略能够根据车辆状态,智能识别道路坡度和车重.道路试验表明,该策略的坡度识别偏差控制在1度以内,车重识别偏差控制在10%以内,实时性较好.

关键词:坡度识别;载重识别;AMT;汽车动力学

[中图分类号]O369 [文献标志码]A

Abstract:Road slope and vehicle mass are the basis for AMT automatic transmission shift for heavy duty commercial vehicles. A road slope and vehicle mass recognition strategy of AMT automatic transmission based on vehicle dynamics was introduced, which can intelligently identify the road slope and vehicle mass based on current vehicle status. Road test shows that, slope deviation is controlled within 1 degree, mass deviation is controlled within 10%, and the real-time performance is good.

Key words:slope recognition; vehicle mass recognition; AMT; vehicle dynamics

電控机械式自动变速器(AMT)具有燃油经济性好、传动效率高、成本低和生产继承性好等优势,是适合中国国情的重型商用车自动变速器.重型商用车行驶过程中,需要AMT控制器识别车辆载重和道路坡度,从而确定合适挡位.我国市场上量产的AMT在道路坡度剧烈变化和车辆非标载情况下,往往无法实时且准确地识别坡度和载重,从而出现循环换挡、动力性差和燃油经济性差等现象.[1\]本文提出一种重型商用车AMT坡度识别和载重识别策略,能够实时识别当前道路坡度和车辆载重,解决国内量产AMT存在的问题.

参考文献

[1] 王玉海,宋健,李兴坤. 驾驶员意图与行驶环境的统一识别及实时算法[J].机械工程学报,2006,42(4):206-212.

[2] Wulrtenberger M,Germann St,Isermann R.Modeling and parameter estimation of nonlinear vehicle dynamics[J] .American Society of Mechanical Engineers,Dynamic Systems and Control Division (Publication) DSC,1992,44:53-63.

[3] 余志生.汽车理论[M].北京:机械工业出版社,2006.

[4] 金辉,葛安林,秦贵和,等. 基于纵向动力学的坡道识别方法研究[J].机械工程学报,2002,38(1):79-86.

编辑:琳莉