湿式双离合器自动变速器离合器控制仿真研究

发布时间：2018-01-03 09:01

本文关键词：湿式双离合器自动变速器离合器控制仿真研究　出处：《重庆大学》2011年硕士论文　论文类型：学位论文

【摘要】：双离合器自动变速器(Dual Clutch Transmission,DCT)是目前车辆变速器领域关注的焦点,研究双离合器自动变速器的关键技术,开发具有自主知识产权的双离合器自动变速器,掌握其核心技术,对促进我国汽车工业的发展与技术进步具有十分重要的现实意义。本文以国家“863”计划资助项目“经济型轿车高性能自动变速器开发”为依托,针对双离合器自动变速器湿式双离合器的关键技术,基于Matlab/Simulink仿真平台,完成湿式双离合器自动变速器起步和换档过程的离合器控制仿真分析,主要进行了以下研究工作: ①以提高汽车起步品质为原则,基于点火、松制动器、踏油门踏板三个节点建立了关于DCT起步的离合器控制策略;该种起步控制策略是在松制动器后,离合器便开始接合,控制参数主要为:离合器的接合速度、接合位移、和节气门开度及其变化率。其中,对于湿式双离合器的离合器接合位移和接合速度可以转化为活塞压盘的压力及其压力变化率。根据车辆的基本参数计算得出各控制参数的数值。 ②以提高车辆换档品质为原则,在分析双离合器自动变速汽车换档品质影响因素的基础上,综合各种换档类型的优点,制定组合型的两参数换档规律。分析离合器传递转矩变化率及传动系统阻尼对换档品质的影响,通过对换档时发动机输出转矩和离合器传递转矩变化率控制,分别制定了升档和降档时的离合器控制策略。 ③根据车辆的基本参数和已制定的DCT起步时的离合器控制策略,并基于Matlab/Simulink仿真平台,建立DCT车辆起步时的离合器控制系统的仿真模型。对无油门开度阶段和有油门开度阶段DCT起步时的离合器控制进行仿真分析。 ④根据车辆的基本参数和已制定的DCT升档和降档时的离合器控制策略,基于Matlab/Simulink仿真平台,分别建立DCT升档和降档时的离合器控制系统的仿真模型。对DCT换档时的离合器控制进行仿真分析。
[Abstract]:Double clutch automatic transmission (Dual Clutch Transmission, DCT) is the focus of vehicle transmission field at present, research on the key technology of dual clutch automatic transmission, the development of dual clutch automatic transmission with independent intellectual property rights, to grasp its core technology, which has very important practical significance for promoting the development of China's automobile and technology with the development of the industry.
Based on the national "863" program "economy car high performance automatic transmission development" as the basis, the key technology for the dual clutch automatic transmission wet dual clutch, based on Matlab/Simulink simulation platform, simulation analysis of clutch control complete wet dual clutch automatic transmission starting and shifting process, the main research work is as follows:
In order to improve the quality of vehicle starting principle, based on the ignition, releasing the brake pedal, the accelerator pedal three nodes is established on the DCT start clutch control strategy; the starting control strategy is in loose brake, clutch engagement began, the main control parameters for speed, clutch engaging displacement, and the solar term door the opening and the change rate. Among them, for wet dual clutch engaging displacement and speed can be transformed into pressure and pressure change rate. The piston pressure plate is calculated according to the basic parameters of vehicles, the control parameters.
In order to improve the quality of vehicle shifting principle, based on the analysis of factors of the dual clutch automatic transmission shifting quality influence, integrating the advantages of various types of shift, two parameter shift schedule making combination. The analysis of the clutch transmission torque change rate and transmission system damping on shift quality, the shift of the engine output torque and the clutch transmission torque rate control, respectively the clutch upshift and downshift the control strategy.
According to the basic parameters of vehicle clutch and established DCT start control strategy, which is based on the Matlab/Simulink simulation platform, simulation model of DCT clutch when starting a vehicle control system. The throttle opening stage and throttle opening stage DCT when starting from the simulation analysis for the control.
According to the basic parameters of vehicle clutch and established DCT upshift and downshift when control strategy based on Matlab/Simulink simulation platform, the simulation models of DCT clutch upshift and downshift when the clutch control system. DCT shift control of the simulation analysis.

【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH133.4

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