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基于轻度混联混合动力系统的特点,本田在前代混合动力系统的基础上研发了第四代混合动力系统IMA。论文对应用在civic2006上的第四代IMA系统的结构,原理和特点进行了研究,同时与前代系统进行了比较分析。 相似文献
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汽车混合动力系统的研究 总被引:5,自引:0,他引:5
汽车混合动力系统采用传统的内燃机和电动机作为动力装置,通过优化设计可以采用高膨胀比内燃机并保证内 燃机长期在高效率工况下稳定工作,借此达到提高油性和减少废气排放的效果。本文重点研究汽车混合动力系统的构成,内燃机与电动机的合理匹配,以及混合动力系统的性能。实例证明,采用混合动力诉汽车可以不用传统的变速器实现无级变速,使汽车具有良好的加速性,使汽车的油耗量减少50%以上,废气排放量明显下降,而且没有电 相似文献
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文章旨在通过分析纯电动乘用车与传统内燃机汽车在动力系统方面的差别,在以经验公式进行计算的基础上,根据前者动力系统的特点,结合某一款纯电动乘用车的项目,初步提出了纯电动汽车动力系统匹配的基本要求;通过分析现有驱动电机的特点,基于动力性、经济性、续航能力及噪声等因素的考虑,找到了一种能满足现阶段电动车开发的电机种类和参数的选配标准。 相似文献
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车用混合动力系统技术发展分析 总被引:1,自引:0,他引:1
介绍了车用混合动力系统的几种结构型式和基本原理;着重分析了柴油机等往复式内燃机与电动机构成的混合动力系统的工作过程、技术关键及应用问题,在此基础上提出了我国开发混合动力系统的一些思考。 相似文献
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重型汽车动力系统的匹配不只是汽车制造厂整车设计中的一门重要课题,也是整车动力系统各大部件供应厂空研究的韪。重型汽车道路模拟应用计算程序,用成熟的数学模型进行在制造汽车之前,较真实地模拟重型汽车在道路及其环境条件下运行的结果。 相似文献
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Stefan Dietz Helmuth Netter Delf Sachau 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》1998,29(6):385-402
For dynamically loaded lightweight structures fatigue strength is an important design criteria. In this paper a new method to predict fatigue lifetime is shown. This is based on the combination of frequency domain and time domain calculations, which allows lifetime prediction with reduced computational effort. The method is implemented to work in a concurrent engineering software environment together with a computer aided design (CAD), a finite-element-method (FEM) and a multibody system (MBS) program. The benefits of the new approach are demonstrated by application to the bogie of a freight locomotive. The dynamic loads acting on the bogie are computed by multibody simulation. The bogie frame is considered as an elastic body of the MBS and the highly nonlinear wheel rail contact is modeled quasi-elastically. For the ride on a straight track the equations of motion can be linearized and the covariance matrix of the loads is calculated. The ride through a ramp is simulated by using the nonlinear differential equations. FEM yields the stresses in the most stressed locations of the bogie depending on the loads calculated by multibody simulation. Based on these stresses the fatigue life prediction is carried out in the MBS post-processing program FATIGUE. 相似文献
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In his extensive career, Joost Kalker worked on many contact phenomena. For this, he developed various theories, which were accompanied by algorithms and computer programs. Most notably, these are the FASTSIM algorithm for quickly evaluating the nonlinear creep-force law in vehicle dynamic simulations, the CONTACT program for the exact theory of rolling contact in 3D elastic halfspaces, and the USETAB program that uses a large table calculated with CONTACT, in order to improve over the FASTSIM algorithm in speed, accuracy and versatility as well. 相似文献
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以某高速公路新建连续刚构桥为工程背景,采用非线性有限元分析方法,通过大型通用非线性有限元程序LS-DYNA建立全桥有限元模型和1 000 t船舶模型,对船-桥碰撞动力过程进行模拟,以确定船-桥碰撞过程中碰撞力的大小,并将有限元计算结果与规范经验公式进行比较。结果表明:船-桥碰撞过程中,船艏发生较大变形,吸收大部分的能量,将动能转化为势能;碰撞过程具有明显的非线性波动特征;各个规范经验公式计算的船撞力差异较大,且规范经验公式具有一定的局限性,有限元分析法能完整再现船-桥碰撞结构内部动力学过程,弥补规范经验公式的不足。 相似文献
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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(11):1541-1562
This paper introduces the active third-axle system as an innovative vehicle dynamic control method. This method can be applicable for different kinds of three-axle vehicles such as buses, trucks, or even three-axle passenger cars. In this system, an actuator on the middle axle actively applies an independent force on the suspension to improve the handling characteristics, and hence, its technology is similar to slow-active suspension systems. This system can change the inherent vehicle dynamic characteristics, such as under/over steering behaviour, in the linear handling region, as well as vehicle stability in the nonlinear, limit handling region. In this paper, our main focus is to show the potential capabilities of this method in enhancing vehicle dynamic performance. For this purpose, as the first step, the proposed method in both linear and nonlinear vehicle handling regions is studied mathematically. Next, a comprehensive, nonlinear, 10 degrees of freedom vehicle model with a fuzzy control strategy is used to evaluate the effectiveness of this system. The dynamic behaviour of a vehicle, when either uncontrolled or equipped with the active third axle is then compared. Simulation results show that this active system can be considered as an innovative method for vehicle dynamic control. 相似文献
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给出了一个基于GIS的多模式动态网络装载程序设计流程。首先,给出了一个新的基于GIS的框架,使之能够用于动态的交通数据的融合、分析以及可视化。这个框架的主要特征是将用于显示空间地图数据与用于动态网络装载的动态交通信息融入统一的体系中。而后给出了相应的多模式动态网络装载程序流程,包括:数据输入,数据预处理以及相应的多模式动态网络装载程序。最后,给出了相应的仿真试验以及结论。 相似文献
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为抑制混合动力汽车加减速过程中传动系统振荡,以电机转矩为控制量,提出一种基于模型预测主动控制混合动力传动系统振荡的策略,基于 Matlab/Simulink平台搭建动态系统模型,实时计算电机转矩补偿优化发动机输出转矩,准确跟踪目标转矩的同时减少传动系统振荡。探索不同控制器参数设置对于驾驶动力性和舒适性的增益效果,通过硬件在环 (Hardware-in-Loop,HIL) 试验表明,所设计的 MPC控制器能使汽车平稳地加减速,迅速跟踪目标转速,求解时间控制在10 ms以内,具有较好的实时性,同时对传动系统中的非线性因素和参数变化有较好的鲁棒性。 相似文献