發(fā)布時(shí)間：2018-02-22 13:54

  本文關(guān)鍵詞： 混合動(dòng)力 功率分流式 EVT 雙模 機(jī)械點(diǎn)　出處：《吉林大學(xué)》2016年碩士論文　論文類型：學(xué)位論文

【摘要】：功率分流式混合動(dòng)力汽車具有串聯(lián)式和并聯(lián)式的優(yōu)點(diǎn),能實(shí)現(xiàn)發(fā)動(dòng)機(jī)和車輪的轉(zhuǎn)速轉(zhuǎn)矩解耦,實(shí)現(xiàn)無極變速,因此構(gòu)型也被稱為電子無極變速器(EVT)。按照功率分流的方式可以分成三種單模構(gòu)型:輸入分流、輸出分流、復(fù)合分流構(gòu)型。將三種結(jié)構(gòu)兩兩組合,可以獲得雙模構(gòu)型,現(xiàn)使用的雙模構(gòu)型一般由輸入分流和復(fù)合分流組合而成。相比于單模構(gòu)型,雙模構(gòu)型中發(fā)動(dòng)機(jī)具有更廣的工作區(qū)間,并且傳動(dòng)效率更高。但是雙模構(gòu)型結(jié)構(gòu)復(fù)雜,種類繁多,在構(gòu)型分析,構(gòu)型選擇,以及控制策略方面都較為復(fù)雜。本文對(duì)功率分流式雙模構(gòu)型進(jìn)行了構(gòu)型分析,構(gòu)型選擇以及控制方法方面的研究。主要內(nèi)容如下:1.分析已有的雙模EVT構(gòu)型,比較這些構(gòu)型的異同。使用杠桿法對(duì)其中的一款構(gòu)型進(jìn)行詳細(xì)分析。包括工作過程中發(fā)動(dòng)機(jī)、電機(jī)的轉(zhuǎn)速轉(zhuǎn)矩變化,構(gòu)型中固定速比功能和實(shí)現(xiàn)方式,以及構(gòu)型的所有工作模式。2.機(jī)械點(diǎn)是功率分流式混合動(dòng)力構(gòu)型的一個(gè)重要的參數(shù),其大小對(duì)汽車的諸多性能均有影響,并且對(duì)構(gòu)型選擇至關(guān)重要。本章首先分析了機(jī)械點(diǎn)對(duì)車輛性能的影響,包括發(fā)動(dòng)機(jī)和電機(jī)的工作范圍、傳動(dòng)效率及車輛動(dòng)力性。其次著重探討機(jī)械點(diǎn)的大小如何確定。最后提出了基于機(jī)械點(diǎn)的構(gòu)型選擇方法,方法可用于對(duì)輸入分流、輸出分流、復(fù)合分流和雙模構(gòu)型進(jìn)行構(gòu)型選擇。3.由于功率分流EVT構(gòu)型和AT構(gòu)型都是由行星機(jī)構(gòu)組合而成,因而本文參照AT的設(shè)計(jì)流程,提出了雙模EVT構(gòu)型的設(shè)計(jì)流程。具體步驟如下:1.傳動(dòng)比范圍的確定,2.機(jī)械點(diǎn)大小的確定,3.基于機(jī)械點(diǎn)的構(gòu)型選擇,4.添加離合器,5.仿真分析驗(yàn)證。用此流程進(jìn)行實(shí)例研究,使用Prius車型的參數(shù),包括整車參數(shù)、性能參數(shù)、發(fā)動(dòng)機(jī)參數(shù)、電機(jī)參數(shù)等,設(shè)計(jì)雙模EVT的構(gòu)型。最后得到了2個(gè)雙模構(gòu)型,3個(gè)雙模+4固定速比的構(gòu)型。4.選擇前文設(shè)計(jì)所得構(gòu)型中的一種,進(jìn)行仿真分析。首先分析整車工作模式,整車控制流程,以及發(fā)動(dòng)機(jī)工作點(diǎn)的控制方法。而后使用AMESIM軟件進(jìn)行整車模型的搭建,用MATLAB/Simulink搭建基于發(fā)動(dòng)機(jī)最優(yōu)曲線的控制算法,最后使用兩者聯(lián)合仿真得到車輛的動(dòng)力性和經(jīng)濟(jì)性,并將仿真結(jié)果與Prius車型的動(dòng)力性和經(jīng)濟(jì)性進(jìn)行對(duì)比,最終得出兩項(xiàng)性能均優(yōu)于單模Prius構(gòu)型的結(jié)論。從而驗(yàn)證設(shè)計(jì)構(gòu)型的合理性,及雙模對(duì)單模構(gòu)型的優(yōu)勢。綜上所述,本文提出的構(gòu)型選擇方法、設(shè)計(jì)流程和仿真控制方法完善了功率分流式雙模EVT構(gòu)型的分析、設(shè)計(jì)以及控制方法,為后續(xù)的硬件在環(huán)和實(shí)車研究打下基礎(chǔ)。
[Abstract]:The power shunt hybrid electric vehicle has the advantages of series and parallel, it can decouple the speed and torque of the engine and the wheel, and realize the infinitesimal variable speed. Therefore, the configuration is also called EVT. According to the mode of power distribution, it can be divided into three kinds of single mode configuration: input split, output split, compound split. Two mode configuration can be obtained by combining the three structures. The current dual-mode configuration is generally composed of input shunt and compound shunt. Compared with single mode configuration, the engine in the dual-mode configuration has a wider working range and higher transmission efficiency, but the dual-mode configuration is complex and has a variety of types. The configuration analysis, configuration selection and control strategy are more complicated. The main contents are as follows: 1. Analyze the existing two-mode EVT configurations, compare the similarities and differences of these configurations. Use the lever method to analyze one of the configurations in detail. The speed and torque change of motor, the function and realization mode of fixed speed ratio in the configuration, and all the working modes of the configuration. 2. Mechanical point is an important parameter of the power shunt hybrid power configuration, and its size has an effect on the performance of the automobile. In this chapter, the influence of mechanical points on vehicle performance, including the working range of engine and motor, is analyzed. Transmission efficiency and vehicle power performance. Secondly, how to determine the size of mechanical points is discussed. Finally, a configuration selection method based on mechanical points is proposed, which can be used to separate input and output. Since the configuration of power shunt EVT and AT are composed of planetary mechanisms, this paper refers to the design flow of AT. The design flow of two-mode EVT configuration is presented. The concrete steps are as follows: 1. The determination of transmission ratio range 2. The determination of mechanical point size 3. Configuration selection based on mechanical point 4. Adding clutch 5. simulation analysis and verification. A case study is carried out with this flow. Using Prius model parameters, including vehicle parameters, performance parameters, engine parameters, motor parameters, etc. The configuration of two-mode EVT is designed. Finally, two dual-mode configurations and three dual-mode four-fixed speed-ratio configurations are obtained. One of the previously designed configurations is selected for simulation analysis. First, the working mode of the whole vehicle is analyzed, and the control flow of the whole vehicle is analyzed. And then use AMESIM software to build the whole vehicle model, use MATLAB/Simulink to build the control algorithm based on the engine optimal curve, and finally use the two simulation to get the power and economy of the vehicle. The simulation results are compared with the dynamic and economical performance of Prius vehicle, and the conclusion that the two performances are superior to the single mode Prius configuration is obtained, which verifies the rationality of the design configuration and the advantages of the dual mode to the single mode configuration. The configuration selection method, design flow and simulation control method proposed in this paper improve the configuration analysis, design and control method of power shunt dual-mode EVT, and lay the foundation for the subsequent research of hardware in loop and real vehicle.
【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：U469.7

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