【正文】 in front disc brake use, while still retaining the rear drum brakes. Braking system of new technologies As people of vehicle safety requirements and the continuous improvement of the rapid development of electronic technology, today39。一方面，制動(dòng)系統(tǒng)通過各種傳感器的實(shí)時(shí)監(jiān)控為制動(dòng)系統(tǒng)的高效制動(dòng)提供了更有效的安全保證；另一方面，制動(dòng)系統(tǒng)與汽車其它系統(tǒng)構(gòu)成了縱橫交錯(cuò)的區(qū)域化網(wǎng)絡(luò)，在實(shí)現(xiàn)智能化的制動(dòng)控制的同時(shí)，還能進(jìn)一步降低汽車的能源消耗；另外，隨著新材料和新結(jié)構(gòu)的大量應(yīng)用，制動(dòng)系統(tǒng)自身的可靠性也得到了進(jìn)一步的改善 Transmission Transmission device can be installed for the braking energy transmission to brake the media, the main cables, hydraulic and pneumatic pipe line. 四 . Brakes Brake is a movement of vehicles or impede the movement of the trend (of power) ponents. According to brake torque generated in different ways, the brakes can be divided into: friction brake (use of fixed and rotating ponents of the surface ponents have a role in the friction brake torque brake) and retarder brakes, brake, broadly speaking, usually referred to the friction brake. At present all kinds of cars used by the brake drum brakes and can be divided into two major categories of disc brakes. Drum brake friction in the rotating ponents of the brake drum, and its work surface for the cylindrical surface of the rotating disc brake ponents for the brake disc, to end the work surface. In addition, under the rotating ponents of the installation of different positions, the brakes can be divided into the wheel brakes and brake two categories. Among them, the rotating wheels, brake ponents installed in the solidwheel or axle, brake torque that is a direct role in both sides of the wheels, respectively, for its general travel brake, and can also be used to brake the second (or emergency Brake) and the car braking。 與鼓式制動(dòng)方式相比，盤式制動(dòng)裝置的機(jī)械部分外露，散熱性能好，減少了由于摩擦熱而產(chǎn)生了制動(dòng)衰退現(xiàn)象，制動(dòng)性能較穩(wěn)定，所以現(xiàn)代轎 車大多采用了盤式制動(dòng)器，但是為了降低車輛成本，部分轎車在前輪采用盤式制動(dòng)器的同時(shí)，后輪仍保留了鼓式制動(dòng)器。 盤式制動(dòng)器主要由制動(dòng)盤（安裝在輪轂上與車輪形成整體旋轉(zhuǎn)）和制動(dòng)鉗（固定在轉(zhuǎn)向節(jié)等懸架構(gòu)件上）組成。內(nèi)張型鼓式制動(dòng)器主要由制動(dòng)鼓（形狀似鍋，安裝在輪轂上，并與車輪同步旋轉(zhuǎn)）、制動(dòng)蹄片（圓弧狀部件，兩個(gè)一組，蹄片外側(cè)粘有產(chǎn) 生制動(dòng)力矩的摩擦襯片）、固定銷及制動(dòng)分缸等。 鼓式制動(dòng)器有內(nèi)張型和外束型兩種。另外，根據(jù)旋轉(zhuǎn)元件的安裝位置不同，制動(dòng)器又可分為車輪制動(dòng)器和中央制動(dòng)器兩大類。目前各類汽車所采用的制動(dòng)器可分為鼓式制動(dòng)器和盤式制動(dòng)器兩大類。四．制動(dòng)器 制動(dòng)器是產(chǎn)生阻礙車輛運(yùn)動(dòng)或運(yùn)動(dòng)趨勢(shì)的力（制動(dòng)力）的部件。根據(jù)制動(dòng)力矩產(chǎn)生的方式不同，制動(dòng)器可分為：摩擦制動(dòng)器（利用固定元件與旋轉(zhuǎn)元件工作表面的摩擦作用產(chǎn)生制動(dòng)力矩的制動(dòng)器）和緩速制動(dòng)器，通常提及的制動(dòng)器泛指摩擦制動(dòng)器。鼓式制動(dòng)器的摩擦副中的旋轉(zhuǎn)元件為制動(dòng)鼓，其工作表面為圓柱面；盤式制動(dòng)器的旋轉(zhuǎn)元件為制動(dòng)盤，以端面為工作表面。其中，車輪制動(dòng)器的旋轉(zhuǎn)元件固裝在 車輪或半軸上，即制動(dòng)力矩直接分別作用于兩側(cè)車輪上，其一般用于行車制動(dòng)，也可兼用于第二制動(dòng)（或應(yīng)急制動(dòng)）和駐車制動(dòng)；中央制動(dòng)器的旋轉(zhuǎn)元件固裝在傳動(dòng)系的傳動(dòng)軸上，其制動(dòng)力矩需經(jīng)過驅(qū)動(dòng)橋再分配到兩側(cè)車輪上，其一般只用于駐車制動(dòng)和緩速制動(dòng)。前者的制動(dòng)鼓以內(nèi)圓柱面為工作表面，在汽車上應(yīng)用廣泛；后者制動(dòng)鼓的工作表面則是外圓柱面，目前只有極少數(shù)汽車將其用于駐車制動(dòng)器。制動(dòng)時(shí)，位于制動(dòng)鼓內(nèi)部的制動(dòng)蹄片一端承受來自制動(dòng)分缸的促動(dòng)力后，繞其另一端的支點(diǎn)向外旋轉(zhuǎn)，壓靠到制動(dòng)鼓內(nèi)圓面上，進(jìn)而產(chǎn)生摩擦力矩（制動(dòng)力矩）。其中，制動(dòng)盤有通風(fēng)式和實(shí)心式兩種；制動(dòng)鉗主要有浮動(dòng)鉗夾式（單活塞）、浮動(dòng)叉式、固定鉗夾式等幾種。 制動(dòng)系統(tǒng)新技術(shù) 隨著人們對(duì)汽車安全性要求的不斷提高和電子技術(shù)的飛速發(fā)展，現(xiàn)今的汽車制動(dòng)系統(tǒng)已經(jīng)發(fā)生了革命性的進(jìn)步。 rotating ponents of the brakeinstalled in the transmission of the transmission shaft, after its brake torque to be driven to the redistribution of the bridge on both sides of the wheel, generally used only for its cars in the system Retarded and dynamic braking. Drum brakes are within and outside the beamtypetwo. The former brake drum to work within the cylindrical surface of the car on the wide application of the latter brake drum is the work of Outer cylindrical surface, only a handful of cars will be used in car brakes. Zhangdrum brakes, mainly by the brake drum (Xingzhuang Si pot, installed in the wheel, and synchronization with the rotating wheels), brake shoes, (arcshaped parts, a group of two, shoes, with a lateral Nien Moment of friction brake lining film), fixed sales and brakecylinder, and so on. Brake, brake drum in the internal brake shoes, brake points from one end to bear the Prokiic cylinder, around the other side of the fulcrum of its outward rotation, the pressure on the brake drum w