【正文】 lling,This shows that, The braking system design of practical significance. The braking system is one of important system of active safety. Based on the structural analysis and the design requirements of intermediate car’s braking system, a braking system design is performed in this thesis, according to the national and professional standards. First through analyzing the main parameters of the entire vehicle, the braking system design starts from determination of the structure scheme. SecondlyCalculating and determining the main dimension and structural type of the front、 rear drum brake，brake master cylinder ans so on， Finally use of puteraided design drawing draw the engineering drawings of the front and rear brakes, the master brake cylinder, the diagram of the brake pipelines. Furthermore, each target of the designed system is analyzed for checking whether it meets the requirements. some factors are considered in this thesis, such as simple structure, low costs, and environmental protection, etc. The result shows that the design is reasonable and accurate, paring with the related national standards. Key words： light truck； brake； drum brake； master cylinder； hydraulic pressure system 本科生畢業(yè)設(shè)計(jì)（論文） III 目 錄 第 1 章 緒 論 ........................................................................................................... 1 本次制動(dòng)系統(tǒng)設(shè)計(jì)的意義 ........................................................................ 1 本次制動(dòng)系統(tǒng)應(yīng)達(dá)到的目標(biāo) .................................................................... 2 本次制動(dòng)系統(tǒng)設(shè)計(jì)內(nèi)容 ............................................................................ 2 汽車(chē)制動(dòng)系統(tǒng)的組成 ................................................................................ 3 制動(dòng)系統(tǒng)類(lèi)型 ............................................................................................. 3 制動(dòng)系工作原理 ........................................................................................ 3 第 2 章 汽車(chē)制動(dòng)系統(tǒng)方案確定 ............................................................................. 5 汽車(chē)制動(dòng)器形式的選擇 ............................................................................ 5 鼓式制動(dòng)器的優(yōu)點(diǎn)及其分類(lèi) .................................................................... 6 盤(pán)式制動(dòng)器的缺點(diǎn) .................................................................................... 7 制動(dòng)驅(qū)動(dòng)機(jī)構(gòu)的結(jié)構(gòu)形式 ........................................................................ 8 簡(jiǎn)單制動(dòng)系 ...................................................................................... 8 動(dòng)力制動(dòng)系 ...................................................................................... 9 伺服制動(dòng)系 ...................................................................................... 9 制動(dòng)管路的形式選擇 .............................................................................. 10 液壓制動(dòng)主缸方案的設(shè)計(jì) ...................................................................... 11 第 3 章 制動(dòng)系統(tǒng)主要參數(shù)的確定 ..................................................................... 13 輕型貨車(chē)主要技術(shù)參數(shù) .......................................................................... 13 同步附著系數(shù)的 0? 的確定 ..................................................................... 13 前、后輪制動(dòng)力分配系數(shù) ? 的確定 ...................................................... 14 鼓式制動(dòng)器主要參數(shù)的確定 .................................................................. 14 制動(dòng)器制動(dòng)力矩的確定 .......................................................................... 15 制動(dòng)器制動(dòng)因數(shù)計(jì)算 .............................................................................. 16 鼓式制動(dòng)器零部件的結(jié)構(gòu)設(shè)計(jì) .............................................................. 17 第 4 章液壓制動(dòng)驅(qū)動(dòng)機(jī)構(gòu)的設(shè)計(jì)計(jì)算 ................................................................. 21 制動(dòng)輪 缸直徑 d 的確定 ........................................................................... 21 制動(dòng)主缸直徑 d0 的計(jì)算 ........................................................................ 21 制動(dòng)踏板力 PF ......................................................................................... 22 本科生畢業(yè)設(shè)計(jì)（論文） IV 制動(dòng)踏板工作行程 Sp ............................................................................ 22 第 5 章 制動(dòng)性能分析 ........................................................................................... 23 制動(dòng)性能評(píng)價(jià)指標(biāo) .................................................................................. 23 制動(dòng)效能 .................................................................................................. 23 制動(dòng)效能的恒定性 .................................................................................. 23 制動(dòng)時(shí)汽車(chē)的方向穩(wěn)定性 ...................................................................... 24 前、后制動(dòng) 器制動(dòng)力分配 ...................................................................... 24 地面對(duì)前、后車(chē)輪的法向反作用力 ........................................... 24 理想的前、后制動(dòng)器制動(dòng)力分配曲線(xiàn) ....................................... 25 實(shí)際的前、后制動(dòng)器制動(dòng)力分配曲線(xiàn) ....................................... 25 制動(dòng)距離 S .............................................................................................. 25 汽車(chē)能夠停留在極限上下坡角度計(jì)算 .................................................. 26 第 6 章 總 結(jié) ......................................................................................................... 27 參考文獻(xiàn) ................................................................................................................. 28 致謝 ......................................................................................................................... 29 附 錄 1.................................................................................................................... 30 附 錄 2.................................................................................................................... 37 本科生畢業(yè)設(shè)計(jì)（論文） 1 第 1章 緒 論 汽車(chē)工業(yè)是一個(gè)綜合性產(chǎn)業(yè)，汽車(chē)工業(yè)的生產(chǎn)水平，能夠代表一個(gè)國(guó)家的整個(gè)工業(yè)水平，汽車(chē)工業(yè)的發(fā)展，能夠帶動(dòng)各行各業(yè)的發(fā)展，進(jìn)而促進(jìn)我國(guó)工業(yè)生產(chǎn)的總體水品。 隨著我國(guó)經(jīng)濟(jì)的發(fā)展，尤其我國(guó)對(duì)外貿(mào)易的不斷擴(kuò)大，汽車(chē)工業(yè)受到國(guó)外同行業(yè)的強(qiáng)烈競(jìng)爭(zhēng)，而我國(guó)汽車(chē)工業(yè)起步比較晚，生成技術(shù)水平較低，因而改進(jìn)和提高我國(guó)的汽車(chē)性能及其機(jī)構(gòu)是一個(gè) 迫在眉睫的問(wèn)題，這關(guān)系到我國(guó)汽車(chē)工業(yè)的生存與發(fā)展的大事。盡可能提高汽車(chē)的行駛速度，是提高運(yùn)輸生產(chǎn)率的主要技術(shù)措施