本文選題：怠速起停 + BSG系統(tǒng)�。� 參考：《吉林大學》2016年博士論文

【摘要】：隨著中國汽車銷售量的逐年增加,目前中國已成為全球汽車銷售量最高的國家。從而帶來中國石油消耗急劇增長,大氣污染日益嚴重。針對這些問題國內外政府相繼出臺了更加嚴格的汽車油耗及排放法規(guī),各車企都在開展節(jié)油減排技術的研究。B50轎車以其穩(wěn)定的質量和卓越的駕駛性能在用戶中享有很好的口碑,但有部分用戶反映B50轎車油耗和排放偏高�；谏鲜霰尘�,本文提出對B50轎車進行節(jié)油減排研究。B50轎車是在產車型,因此在進行節(jié)油減排技術開發(fā)時要確保車輛更改小、成本增加少及開發(fā)周期短,進而提高B50轎車的性價比及市場競爭力。怠速起步停車技術降油耗效果顯著,且整車更改小,成本增加少,因此本文選擇怠速起停技術作為B50轎車節(jié)油減排的研究方向。BSG(Belt driven Starter Generator帶驅動起動發(fā)電一體機)起停系統(tǒng)作為微混合動力技術不但能實現(xiàn)怠速起停功能,還能實現(xiàn)制動能量回收和低速扭矩輔助功能,并且起動噪聲小,因此本文將BSG起停技術作為B50轎車節(jié)油減排的技術方案。BSG電機扭矩控制,發(fā)動機、自動變速箱與整車的協(xié)同控制是BSG起停系統(tǒng)節(jié)油減排的關鍵技術,本文采用數(shù)學建模、仿真分析和試驗驗證相結合的方法,對其進行了重點研究,主要研究內容如下:1.使用Admas軟件建立BSG起停系統(tǒng)發(fā)動機前端輪系動力學模型。對張緊器的結構及性能參數(shù)進行優(yōu)化設計,確定張緊器性能及結構的最優(yōu)設計參數(shù)。并應用該參數(shù)對前端輪系進行仿真分析,仿真結果證明本文設計的前端輪系可實現(xiàn)發(fā)動機快速穩(wěn)定起動。2.根據(jù)BSG起動/發(fā)電一體機功能及性能要求對電機進行選型,建立BSG電機的數(shù)學模型。為提高BSG車輛的起動和低速扭矩性能,本文制定了BSG電機勵磁電流控制策略。使用Matlab/Simulink搭建BSG電機驅動系統(tǒng)仿真模型,分析勵磁電流控制策略對BSG電機系統(tǒng)的穩(wěn)態(tài)性能和動態(tài)性能的影響。仿真結果表明:本文提出的勵磁電流控制策略使得BSG電機具備了低速大轉矩及快速響應等性能優(yōu)點,有效提高了發(fā)動機的起動性能,保證了車輛怠速起停功能的穩(wěn)定性。3.在重點考慮駕駛員安全性、駕駛舒適性和燃油經濟性的基礎上,制定了BSG起停系統(tǒng)整車控制策略,并設定相關重要參數(shù)的閾值。應用CRUISE軟件對BSG起停系統(tǒng)進行仿真分析,結果證明BSG起停系統(tǒng)可有效降低油耗。針對車輛冷起動和起步階段排放污染物高的問題,本文提出了發(fā)動機、變速箱協(xié)同控制策略。通過控制變速箱升檔來增加發(fā)動機噴油量,縮短催化器起燃時間,從而降低車輛冷起動和起步階段排放污染物。4.研制BSG起停系統(tǒng)關鍵零部件,搭建BSG起停系統(tǒng)樣車。在轉轂試驗臺及城市實際道路上,進行實車油耗測試。結果證明本文制定的BSG起停系統(tǒng)控制策略可有效降低車輛使用油耗。在臺架上對車輛冷起動和起步階段降排放控制策略開啟及關閉兩種狀態(tài)進行排放測試,結果表明本文制定的排放控制策略可加速催化器起燃,可有效降低車輛冷起動及起步階段排放污染物。對樣車進行-25℃的低溫冷起動測試,測試結果為車輛一次性點火起動成功,起動時間小于0.5s,且發(fā)動機起動穩(wěn)定。證明車輛前端輪系設計合理,BSG電機起動扭矩控制策略正確有效。整車性能測試通過后,對車輛進行起停系統(tǒng)邊界條件測試,車輛安全及功能測試。測試結果全部滿足功能及性能要求,樣車通過驗收。本文通過在B50轎車上開發(fā)BSG起停系統(tǒng)并進行整車臺架及道路試驗,來研究B50轎車怠速起步停車工況的節(jié)油減排技術。研究結果表明本文開發(fā)的BSG電機、發(fā)動機及自動變速箱協(xié)同控制技術正確有效,實現(xiàn)B50轎車綜合工況節(jié)油5%以上,排放污染物降低10~20%。本文研制的BSG起停系統(tǒng)樣車功能及性能測試滿足駕駛員安全性及舒適性要求。本文研究成果為車輛節(jié)油減排提供了技術方案,對推廣BSG起停系統(tǒng)的應用具有實際意義,為后續(xù)48V系統(tǒng)在轎車上的開發(fā)應用奠定了實踐基礎。
[Abstract]:With the increase of Chinese car sales year by year, China has become the highest car sales country in the world. Thus, China's oil consumption is increasing rapidly and the air pollution is becoming more and more serious. In view of these problems, more stringent automobile fuel consumption and discharge regulations have been issued by the government at home and abroad, and all the enterprises are developing the technology of reducing oil and emission reduction. .B50 sedan enjoys a good reputation among users with its stable quality and excellent driving performance, but some users reflect the high fuel consumption and high emission of B50 cars. Based on the above background, this paper puts forward the research on the emission reduction and emission reduction of B50 cars,.B50 car is in the production model, because this is to ensure the development of oil saving and emission reduction technology. The vehicle change is small, the cost is less and the development cycle is short, and then the performance price ratio and market competitiveness of the B50 car are improved. The idle speed starting parking technology has a significant effect on reducing the oil consumption, and the change of the vehicle is small and the cost is less. Therefore, this paper chooses the idle start and stop technology as the research direction of the oil saving and drainage of the B50 car.BSG (Belt driven Starter Generator belt) As a micro hybrid power technology, the starting and stopping system can not only realize the idle stop function, but also realize the braking energy recovery and the low speed torque auxiliary function, and the starting noise is small. Therefore, this paper takes the BSG starting and stopping technology as the technical scheme of the B50 car's fuel saving and emission reduction,.BSG motor torque control, engine, automatic transmission The key technology of fuel saving and emission reduction in BSG starting and stopping system is the key technology of the coordinated control between the box and the whole vehicle. In this paper, the main research contents are as follows: 1. using the mathematical modeling, simulation analysis and test verification, the main research contents are as follows: 1. using the Admas software to establish the dynamic model of the front wheel system of the starting and stopping system of the BSG stop system. The performance parameters are optimized and the optimal design parameters of the performance and structure of the tensioner are determined. The simulation results of the front wheel system are carried out with this parameter. The simulation results show that the front wheel system designed in this paper can realize the fast and stable start of the engine starting.2., which is based on the function and performance requirements of the BSG starting / generating unit. The mathematical model of the BSG motor. In order to improve the starting and low-speed torque performance of the BSG vehicle, the excitation current control strategy of the BSG motor is formulated. The simulation model of the BSG motor drive system is built with Matlab/Simulink, and the influence of the excitation current control strategy on the steady-state performance and dynamic performance of the BSG motor system is analyzed. The proposed excitation current control strategy makes the BSG motor have the advantages of low speed and large torque and rapid response, which can effectively improve the starting performance of the engine and ensure the stability of the idle start and stop function of the vehicle..3., based on the driver's safety, driving comfort and fuel economy, has formulated the whole BSG starting and stopping system. The vehicle control strategy and the threshold of the important parameters are set. The simulation analysis of the BSG starting and stopping system is carried out with CRUISE software. The result shows that the BSG start stop system can effectively reduce the fuel consumption. In view of the problem of high emission of pollutants in the cold starting and starting stages of the vehicle, this paper proposes a coordinated control strategy of the engine and the gearbox. In order to increase the fuel injection of the engine and reduce the starting time of the catalyst, the key parts of the BSG starting and stopping system are developed by.4., and the prototype of the BSG starting and stopping system is set up. The actual vehicle oil consumption test is carried out on the hub test bench and the actual city road. The results prove that the BSG starting and stopping system is controlled by this paper. The strategy can effectively reduce the fuel consumption of vehicles. On the bench, the emission control strategy of the cold start and start stage of the vehicle is opened and closed in two states. The results show that the emission control strategy developed in this paper can accelerate the combustion of the catalyst, and can effectively reduce the emission of the vehicle in cold start and start stage. At low temperature cold start test at -25 C, the results show that the starting time of the vehicle is successful, the starting time is less than 0.5s, and the starting of the engine is stable. It is proved that the design of the front wheel system is reasonable and the starting torque control strategy of the BSG motor is correct and effective. After the vehicle performance test passes, the vehicle's lifting system boundary condition is tested and the vehicle safety is carried out. Complete and function test. The test results all meet the function and performance requirements, the sample car passes the acceptance. This paper studies the technology of reducing oil and emission reduction for the idle start stop working condition of the B50 car by developing the BSG starting and stopping system on the B50 car and carrying out the whole vehicle bench and road test. The results show that the BSG motor, engine and auto change of this paper are developed in this paper. The speed box cooperative control technology is correct and effective. The B50 car has more than 5% fuel saving and the emission of pollutants is reduced by 10~20%.. The function and performance test of the BSG starting and stopping system can meet the driver's safety and comfort requirements. The results of this paper provide the technical scheme for the vehicle fuel saving and emission reduction, which should be used to popularize the BSG starting stop system. It has practical significance and lays a practical foundation for the subsequent development and application of 48V system on cars.
【學位授予單位】：吉林大學
【學位級別】：博士
【學位授予年份】：2016
【分類號】：U471.23

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