用于HEV多能源动力总成控制系统的 HILSS的研制

本文对硬件在环仿真技术进行了分析研究,在此基础上结合混合动力汽车(HEV)动力总成控制单元(PCU)的开发要求,构建了硬件在环仿真系统(HILSS),并将开发的HILSS应用于HEV动力总成控制单元的设计开发和功能测试,提高了系统的设计效率和设计水平.     

动力驱动系统匹配与控制策略研究

能源、有害气体和温室气体排放是影响今后汽车技术发展的三大问题.可外接充电式混合动力电动汽车是指可以使用电力网对动力电池进行充电的混合动力电动汽车,是向最终的清洁能源汽车过渡的最佳方案之一.为实现新一代燃料电池城市客车原理样车的动力性能指标,样车动力驱动系统采用串联式能量混合型结构,基于可外接充电技术,对动力驱动系统的主要部件性能参数进行了合理的匹配理论研究.基于ADVISOR软件建立动力驱动系统仿真模型并提出了不同工作模式和控制策略.分别从纯电动工况、中国典型城市客车车况下对纯电动里程、SOC、动力电池和燃料电池的输出功率进行了仿真研究、动力性能满足性能指标要求,仿真结果验证了匹配理论、控制策略和模型的准确性.     

Multimode combustion in a mild hybrid electric vehicle. Part 1: Supervisory control

This is the first of a two-part simulation study that discusses the application of a multimode combustion engine in a mild hybrid electric vehicle (HEV). The torque assist, offered by the electric motor, can be used to extend the residence time in the homogeneous charge compression ignition (HCCI) regime, before returning to spark-ignition (SI) combustion. To enable multimode operation in the HEV, the supervisory control strategy has to maintain the battery's state-of-charge while accounting for the SI/HCCI combustion mode switch. In this study four supervisors are discussed which extend the baseline equivalent consumption minimization strategy by the mode switching decision.     

HEV动力总成硬件在环仿真系统的研究与开发

硬件在环仿真技术是现代控制系统设计中先进的技术手段。结合混合动力汽车(HEV)动力总成控制单元(PCU)的开发要求，分别从硬件在环仿真系统(HILSS)的硬件和软件两个方面对HEV动力总成HILSS进行了设计开发工作。开发的HILSS应用于HEV动力总成控制单元的设计开发和功能测试，提高了系统的设计效率和设计水平。     

轻度混合动力电动汽车多能源动力总成控制器的开发

以某轻度混合动力电动汽车为对象研究整车功率分配策略,详细分析驾驶员功率需求确定、发动机工作区域优化和制动能量回收控制策略,并在此基础上开发了多能源动力总成控制器的硬软件系统。通过对多能源动力总成控制器的硬件在环仿真试验和实车匹配测试,不仅证明该控制器能高效、可靠地运行,而且取得了降低整车油耗16．9％,排放指标远低于欧III标准的控制效果。     

坦克动力舱内三维空气流动数值模拟

建立了坦克动力舱内三维空气流动数学模型，应用k—ε双方程湍流模型描述湍流流动，冷却风扇局部区域处的空气流动以旋转坐标系控制方程求解；将散热器芯部作为多孔介质处理，采用非结构化网格与网格自适应技术实施区域离散化。数值算例的结果显示，这种数值模拟方法可以用于坦克动力舱内的空气流动分析。     

并联式混合动力汽车多能源动力总成控制单元的研究与开发

根据并联式混合动力系统结构，研究了其运行模式以及动力源能量分配的控制策略。研究了配置自动机械式变速器的换档要求，提出了控制系统切实可行的换档控制方案。设计开发了动力总成控制单元。并利用自主开发的硬件在环仿真系统对其进行了测试和验证。测试结果表明，开发的控制器满足设计要求，为进一步的台架试验工作奠定了基础。     

Design of distributed hybrid electric tractor based on axiomatic design and Extenics

Led by the goals of energy saving and low emissions, tractors need more efficient operations under complex farmland working environments. The powertrain architecture of the tractor has a significant influence on the performance. Therefore, the research on the innovative design of the tractor powertrain architecture can improve the efficiency, energy saving, and environmental protection effects. Based on the creative design method of Axiomatic Design (AD) and Extenics, this paper conducts an innovative design analysis of the powertrain architecture of distributed hybrid electric tractor (DHET). Firstly, AD is used to perform the hierarchical analysis of the tractor powertrain architecture design. Then according to the design content, the design matrix (DM) is established, and the matrix is transformed to extract the 3 × 3 coupling contradiction matrix. Finally, the application of Extenics solves the contradictions in the innovative design of the tractor powertrain architecture. Simulation and prototype experiments have proved that DHET has the advantages of energy saving and emission reduction. This paper analyzes the innovative design of DHET's powertrain architecture, which can provide a theoretical basis and method support for the product's innovative design.     

天然气混合动力公交车的设计与仿真分析

设计了天然气混合动力公交车,动力系统采用并联式结构;应用ADVISOR软件对其进行了相关循环工况下的仿真分析,结果表明车辆的经济性和动力性都得到了一定程度的提高。     

Control of gear shifts in dual clutch transmission powertrains

To achieve the best possible responses during shifting in dual clutch transmissions it is commonplace to integrate clutch and engine control, while the clutch is used to match speeds between the engine and wheels via reduction gears, poor engine control can lead to extended engagement times and rough/harsh shift transients. This paper proposes a method for combined speed and torque control of vehicle powertrains with dual clutch transmissions for both the engine and clutches. The vehicle powertrain is modelled as a simple four degree of freedom system with reduction gears and two clutches. Including a detailed clutch hydraulic model, comprising of the direct acting solenoids and clutch piston with the hydraulic fluid modelled as a compressible fluid. Powertrain control is realised through control of clutch solenoids and manipulation of the engine throttle input. Sensitivity study of clutch performance evaluating inaccurate torque estimation demonstrated variance in the response of the hydraulic system, with an indicative simulation of poor estimation resulting in increased powertrain vibration during and after shifting. Simulations are conducted to demonstrate the capacity for this method of engine and clutch control to further reduce shift transients developed in dual clutch transmission powertrains. The obtained results also show that the adoption of torque based control techniques for both the clutch and engine, which makes use of the estimated target clutch torque, significantly improves the powertrain response as a result of reduction in the lockup discontinuities.