怎样 坡上起步

上课了！同学们好．起步停车的基本知识我们上节渫已经向大家介绍过了．这节课 我们就来讲一讲坡上起步的一些要领。说到坡起．还真让不少开手动挡车的新手发怵。现在城市中的立交桥一个接一个，坡起技术不过关可不行。     

离合器接合不稳敌障一例

一辆东风EQ1290型汽车，在重载或坡上起步时，完全松开离合器踏板后汽车不能起步，稍后汽车又突然前冲，猛地一下起步。     

离合器接合不平稳故障一例

一辆东风EQ1290型汽车在重载或坡上起步时,完全松开离合器踏板后汽车未能起步,稍后汽车又突然前冲,猛一下起步。     

离合器接合不稳故障一例

一辆东风EQ1290型汽车,在重载或坡上起步时,完全松开离合器踏板后汽车不能起步,稍后汽车又突然前冲,猛地一下起步.     

东风EQ1290型汽车离合器接合不平稳故障排除一例

<正>故障现象:一辆东风EQ1290型汽车,在重载情况下或坡上起步时,完全松开离合器踏板后,汽车未能起步,稍后汽车又突然前冲、猛地一下起步。故障检查:首先认为是离合器     

维修档案

实例一故障现象一辆春兰CL125豹摩托车行驶5.7万公里后发现,离合器打滑严重,起步时必须加大油门,提高发动机转速才能勉强起步,正常行驶时必须慢慢加大油门,若突然加大油门发动机则空转。摩托车遇到5°左右坡度时,必须有100m左右的冲坡条件,否则爬不上坡。故障分析与排除复查故障,启动发动机一打就着。按正常方法起步无效,缓加油门后勉强起步。路试过程中发动     

第四课 怎样安全并线

同学们，上课时间又到了。上节课和大家一起学习了坡上起步的一些小窍门，想必大家已经能够熟练掌握了。这节课我们一起来探讨一下行驶中并线的问题。注意观察一下就不难发现，如今路上发生的大大小小的事故中，有相当一部分是因为并线不慎造成的。新手谨小慎微，犹犹豫豫；老手则如入无人之境，强并抢行已经成了家常便饭……种种不良习惯和不正确的方法埋下了不省交通安全隐患。     

智能辅助控制让驾驶安全无虞——分析EPB坡道辅助功能和DCT联合应用的方案及策略设计

电子驻车EPB （Electronic Parking Brake）是指由电子控制方式实现停车制动,本文全面介绍了EPB的工作方法、激活释放条件等,并结合上海汽车变速器有限公司双离合器变速箱起步控制的特点,分析了EPB系统中DAA坡道辅助起步功能和DCT联合应用的方案,详细而具体地说明DAA过程中变速箱控制策略的设计和优化方法,实车结果表明,该策略可以有效地实现EPB DAA起步要求,坡起平顺且完全不溜坡,具有很强的实用性.     

一种纯电动汽车坡道辅助起步系统研究

本文介绍一种纯电动汽车坡道辅助起步系统。进入坡道辅助起步功能后,可第一时间响应误差较小的防溜坡扭矩预测值,从而提升车辆稳定性和平顺性。     

离合器接合不平稳故障排除一例

故障现象:一辆东风EQ1290型汽车,在重载或坡上起步时,完全松开离合器踏板后,汽车未能及时起步,稍后汽车又出现突然前冲现象。故障检查:首先检查离合器操纵机构中机械传动的各连接部位及分离轴承的技术状况,并未发现卡滞及松动,随对分离轴承及各传动连接部位进行保养润滑,故障并     

Multi-state control strategy of starting for a wet friction clutch via a fuzzy logic algorithm

Wet multi-plate friction clutches are used in automotive drivelines to transfer torque, change gears, and prevent motion by locking-up components in the transmission. The control strategy of starting is a crucial technology for the application of a wet multi-plate friction clutch in the automotive industry. In this paper, a multi-state fuzzy control strategy for starting is presented and applied to a continuously variably transmission (CVT) powertrain for the validation of this strategy. The operation of the clutch was divided into four states: parking, starting, riding and emergency. The starting state was investigated in detail. A fuzzy algorithm was employed to control the pressure of the hydraulic cylinder acting on the clutch. A distinguishing feature is that the pressure does not increase but decreases to implement smooth starting during the initial period of starting. The rapid-control prototype (RCP) of the wet friction clutch was developed to validate the new control strategy onboard a test vehicle. Based on the experimental results, the multi-state control strategy for a wet friction clutch is a viable candidate for engineering applications.     

Modeling and control of engine starting for a full hybrid electric vehicle based on system dynamic characteristics

This paper focuses on the dynamic modeling and control of engine starting for a Full Hybrid Electric Vehicle (FHEV) consisting of an Integrated Starter Generator (ISG) and Dual Clutch Transmissions (DCTs). The dynamic characteristics of the engine, the ISG motor and the main clutch are analyzed respectively. The dynamic models of the main components of the powertrain system are also established taking the system dynamic characteristics into consideration. The FHEV dynamic model of engine starting during electric driving mode has been investigated in detail. The coordinated control strategy of engine starting has been proposed based on the powertrain system dynamic characteristics. The simulation for the engine starting control during electric driving mode has been performed based on the Matlab/Simulink platform. The simulation results show that the proposed control strategy satisfies the requirements of response and smoothness during engine starting process. Furthermore, a bench test has been carried out to analyze the system characteristics during engine starting process. The test data is highly agreeable to the simulation data and the effectiveness of engine starting control strategy is validated by the comparison between simulation results and the test data.     

基于扩展状态观测器和滑模控制的双离合器自动变速器起步自适应控制

双离合器自动变速器（Dual Clutch Transmission,DCT）随着服役时间的增加离合器性态会发生变化导致起步性能下降,为降低离合器性态变化对起步性能的影响,提出一种基于扩展状态观测器和滑模控制的DCT起步自适应控制方法。首先,建立DCT起步动力学模型、发动机模型和液压控制系统模型;将DCT起步问题转化为参考轨迹跟踪问题,通过工况识别并利用极小值原理获得了不同起步工况的参考轨迹;在DCT起步动力学模型中将与离合器性态变化相关的项定义为不确定项,设计扩展状态观测器对不确定项进行估计,同时结合自适应滑模控制器,获得了起步发动机转矩和离合器油压的自适应控制率;为了跟踪发动机转矩和离合器油压的自适应控制率,设计了发动机转矩跟踪控制器,同时对液压系统采用了PID闭环控制;通过MATLAB/Simulink平台仿真以及台架试验验证所提出的DCT起步控制方法对离合器性态变化的自适应效果。研究结果表明：所提出的起步自适应控制方法能够有效避免由离合器性态变化导致的起步延时,同时1挡缓起步和急起步的仿真冲击分别减小了53.11%和43.42%,试验起步冲击分别减小了35.66%和30.31%。     

Starting sliding mode variable structure that coordinates the control and real-time optimization of dry dual clutch transmissions

This paper researches the coordination of control between an engine and clutch at the system level to adequately reflect a driver’s intention and improve the starting performance of a vehicle equipped with a dry dual clutch transmission (DCT). Four-degree-of-freedom (DOF) starting dynamic equations are established for a dry DCT with a single intermediate shaft, and a two-DOF model of the sliding friction process and a single-DOF in-gear model of stable operation are obtained after simplifying these equations. Taking advantage of predictive control and a genetic algorithm, target tracing curves of the engine’s speed and the vehicle’s velocity are optimally specified online, and the starting sliding mode variable structure (SMVS) coordinating control strategy is designed to track these curves. The starting performance of a prototype car equipped with a dry DCT is simulated under different starting cases on the MATLAB/Simulink software platform. The simulation results show that the designed SMVS coordinating controller not only embodies driver intention and effectively improves the dry DCT car’s starting performance but is also highly robust when subjected to variations in the vehicle parameters.     

基于LABCAR的插电式混合动力轿车硬件在环测试系统设计与应用

以LABCAR为平台搭建了插电式混合动力轿车硬件在环测试系统,该系统可实现对混合动力控制器的功能验证测试和性能测试,以及模拟实车故障验证诊断策略等,针对实车较难测试的电驱变速器的液压油路系统和离合器等故障进行模拟,体现出硬件在环测试在难以实现的特殊或危险驾驶工况中,减少实车路试的次数,降低测试危险方面的优势,在混合动力控制器开发中起到关键作用.     

电控柴油机起动工况的标定匹配研究

研究了安装VP37电控分配泵柴油机起动工况的标定匹配。借助VS100先进的实时测量和后处理功能及对排放的测量,分析了燃油系统控制参数对起动过程的影响。用曲轴转速分析法分析起动过程简单易行,而且能判断各缸循环的失火情况。在综合衡量排放和起动性能的基础上,确定了电控燃油系统起动模块的控制参数,标定后的柴油机起动顺畅,排放低。     

电动汽车矢量控制的模糊-PID复合控制方式

在异步电机矢量控制方法的基础上，提出了电动汽车交流异步电机驱动矢量控制系统的模糊－PID复合控制方式，以使汽车在起步和加速时获得最大的加速度，并设计了具体的控制策略。然后基于MATLAB／SIMULINK仿真平台建立了整个控制系统的仿真模型，并给出了仿真结果。结果表明，采用模糊PID矢量控制的交流驱动电动汽车在各种附着系数路面均具有良好的起步、加速和稳速性能。     

DCT起步离合器滑磨控制策略制定及验证

结合离合器的工作原理,对DCT起步时离合器的动作过程进行了分析,并提出起步时离合器的控制方案。为了实现车辆的平稳起步,在离合器的滑磨控制中引入模糊控制理论,从而延长离合器的使用寿命。利用Matlab建立起步控制模型,通过仿真实验验证所建立的控制模型是可行的。     

离合器起步过程的控制策略

离合器起步控制是电控机构式自动变速器（Ａｕｔｏｍａｔｅｄ ｍｅｃｈａｎｉｃａｌ ｔｒａｎｓｍｉｓｓｉｏｎ，ＡＭＴ）发展过程中的一项关键技术。本文基于起步性能评价指标的分析，提出维持发动机恒速的离合器起步控制原则，并将实现该原则的控制方法应用于桑塔纳２０００型轿车，从而有效地提高了车辆的起步品质。     

电控机械式自动变速器起步控制

系统地分析了离合器接合各阶段的特点及其对起步品质评价指标的影响。以降低起步冲击度和减少离合器滑磨功为原则，提出了离合器接合的控制策略，并阐述了离合器接合量及接合速度的确定方法。采用该控制方法对桑塔纳2000样车进行了试验研究，证明了该方法能有效地提高车辆的起步品质。