无级变速车辆起步液力变矩器分段滑差控制  

A Study on Hydraulic Torque Converter Sectional Slip Control for CVT Vehicle Start

作　　者：雷雨龙[1] 扈建龙[1] 付尧[1] 贾玉哲 王林波 程靖[1] Lei Yulong;Hu Jianlong;Fu Yao;Jia Yuzhe;Wang Linbo;Cheng Jing(Jilin University, State Key Laboratory of Automotive Simulation and Control, Changchun 130025;FAW Jiefang Automotive Co., Ltd., Changchun 130011)

机构地区：[1]吉林大学汽车仿真与控制国家重点实验室,长春130025 [2]一汽解放汽车有限公司,长春130011

出　　处：《汽车工程》2019年第2期177-183,共7页Automotive Engineering

基　　金：国家自然科学基金(51575220);国家重点研发计划项目(2016YFB0101402-01);吉林省科技发展计划项目(20160519008JH;20170204073GX;20180520071JH)资助

摘　　要：本文中针对无级变速器车辆液力变矩器起步过程存在的加速性能差、发动机转速偏高和转速波动大的问题,提出了一种基于发动机恒转速控制的闭锁离合器起步滑差分段控制策略,并基于Amesim和MATLAB/Simulink搭建整车联合仿真平台,进行验证。仿真结果表明,在50%油门开度下,本文中提出的控制策略可将液力变矩器的闭锁时间提前1.2s左右,同时也可将50%油门开度起步阶段的燃油消耗节省5.385%,为进一步挖掘动力传动系统节油潜力提供了新的方法。To solve the problems of slow acceleration response, high engine speed and engine speed fluctuations in the starting process of CVT vehicle torque converter, a segmented slip control strategy of lock-up clutch at starting conditions is brought forward based on constant engine speed control and a vehicle co-simulation platform based on Amesim and Matlab/Simulink is established to verify the proposed strategy. The simulation results show that the proposed control strategy can advance the locking time of the torque converter by about 1.2s and reduce the fuel consumption by 5.385% at the start stage of 50% throttle opening. The proposed strategy provides a new method for further tapping the fuel-efficient potential of the powertrain.

关 键 词：液力变矩器 闭锁离合器 滑差控制 起步工况 

分 类 号：U463.2[机械工程—车辆工程]