汽車制動控制系統(tǒng)

附錄 A： 淺談汽車制動系統(tǒng)及其發(fā)展趨勢 制動系統(tǒng)作用是：使行駛中的汽車按照駕駛員的要求進行強制減速甚至停車；使已停駛的汽車在各種道路條件下 (包括在坡道上 )穩(wěn)定駐車；使下坡行駛的汽車速度保持穩(wěn)定。 對汽車起制動作用的只能是作用在汽車上且方向與汽車行駛方向相反的外力，而這些外力的大小都是隨機的、不可控制的，因此汽車上必須裝設(shè)一系列專門裝置以實現(xiàn)上述功能。 汽車制動系統(tǒng)是指為了在技術(shù)上保證汽車的安全行駛，提高汽車的平均贊嘆速度等，而在汽車上安裝制動裝置專門的制動機構(gòu)。一般來說汽車制動系統(tǒng)包括行車制動裝置和停車制動 裝置兩套獨立的裝置。其中行車制動裝置是由駕駛員用腳來操縱的，故又稱腳制動裝置。停車制動裝置是由駕駛員用手操縱的，故又稱手制動裝置。 行車制動裝置的功用是使正在行駛中的汽車減速或在最短的距離內(nèi)停車。而停車制動裝置的功用是使已經(jīng)停在各種路面上的汽車保持不動。但是，有時在緊急情況下，兩種制動裝置可同時使用而增加汽車制動的效果。有些特殊用途的汽車和經(jīng)常在山區(qū)行駛的汽車，長期而又頻繁地制動將導(dǎo)致行車制動裝置過熱，因此在這些汽車上往往增設(shè)各種不同型式的輔助制動裝置，以便在下坡時穩(wěn)定車速。 按照制動能源情況，制動系還可分 為人力制動系、動力制動系、和伺服制動系等 3 種。人力制動系以駕駛員的體力作為制動能源；動力制動系以發(fā)動機動力所轉(zhuǎn)化的氣壓或液壓作為制動能源；而伺服制動系則是兼用人力和發(fā)動機動力作為制動能源。此外，按照制動能量的傳遞方式，制動系又可分為機械式、液壓式、氣壓式和電磁式等到幾種。 在種類汽車制動系統(tǒng)中，制動器是汽車制動系中用以產(chǎn)生阻止車輛運動或運動趨勢的力的部件。目前，種類汽車所使用的制動器都是摩擦制動器，也就是阻止汽車運動的制動力矩來源于固定元件和旋轉(zhuǎn)工作表面之間的摩擦。 形式分類 鼓式剎車 鼓式剎車是一種傳統(tǒng)的制動系統(tǒng)，其工作原理可以很形象地用一只咖啡杯來形容剎車鼓就像咖啡杯，當您 將五個手指伸入旋轉(zhuǎn)的咖啡杯時，手指就是剎車片 ,只要您將五指向外一張，摩擦咖啡杯內(nèi)壁 ,咖啡杯就會停止旋轉(zhuǎn)汽車上的鼓式剎車簡單點說是 由制動油泵 ,活塞 ,剎車片和鼓室組成 ,剎車時由制動分泵的高壓剎車油推動活塞， 對兩片半月形的制動蹄片施加作用力 ,使其壓緊鼓室內(nèi)壁 ,靠摩擦力阻止剎車鼓轉(zhuǎn)動從而達到制動效果。 碟式剎車 同樣 ,碟式剎車的工作原理可用一只碟子來形容，您用拇指和食指捏住旋轉(zhuǎn)的碟子時 ,碟子也會停止旋轉(zhuǎn)汽車上的碟式剎車是由剎車油泵 ,一個與車輪相連的剎車圓盤和圓盤上的剎車卡鉗組成剎車時，高壓剎車油推動卡鉗內(nèi)的活塞 ,將制動蹄片壓向剎車盤從而產(chǎn)生制動效果。 碟式剎車碟式剎車有時也叫盤式剎車 ,它分普通盤式剎車和通風(fēng)盤式剎車兩種。 通風(fēng)盤式剎 車是在兩塊剎車盤之間預(yù)留出一個空隙 ,使氣流在空隙中穿過 ,有些通風(fēng)盤還在盤面上鉆出許多圓形通風(fēng)孔，或是在盤面上割出通風(fēng)槽或預(yù)制出矩形的通風(fēng)孔通風(fēng)盤式剎車利用風(fēng)流作用 ,其冷熱效果要比普通盤式剎車更好。碟式剎車的主要優(yōu)點是在高速剎車時能迅速制動，散熱效果優(yōu)于鼓式剎車 ,制動效能的恒定性好 ,便于安裝像 ABS 那樣的高級電子設(shè)備鼓式剎車的主要優(yōu)點是剎車蹄片磨損較少 ,成本較低 ,便于維修、由于鼓式剎車的絕對制動力遠遠高于碟式剎車 ,所以普遍用 于后輪驅(qū)動 的卡車上 . 盤式制動器 近年來，汽車速度在不斷提高，貨車和大客車的總重不 斷增加。另外，轎車的重心普遍降低和廣泛采用小直徑寬斷面的輪胎，使制動器安裝位置受到限制，因此在重型貨車和轎車上采用制動熱穩(wěn)定能較好的盤式制動器的日益增多。而盤式制動器可分為鉗盤式制動器和全盤式制動器兩種。 電控單元 ABS 防抱死制動系統(tǒng)是一種汽車電子系統(tǒng)，它包括一個電子控制單元、數(shù)個輪速感應(yīng)器和一個內(nèi)含電滋閥的閥門總成。電子控制單元通過輪速感應(yīng)器傳來的脈沖變動來掌握車輪的運行狀況。當某一個車輪有可能產(chǎn)生抱死狀態(tài)時，電子控制單元就會向電滋閥發(fā)出指令，使其通過快速開關(guān)來達到控制剎車，調(diào)整轉(zhuǎn)速的目的。一般來說，這種快速開關(guān)閥門的動作每秒鐘可達 12 次之多。某些高級車型的 ABS 可以擁有四套回路系統(tǒng)，即 “ 四回路 ABS” 。這種高科技產(chǎn)品主要有電子式和機械式兩種類型。電子式安全系數(shù)較高，價格也高，原來只是配置在大型豪華轎車之上 ，現(xiàn)在，中小型普通轎車也開始配置；機械式安全系數(shù)較低，價格也低，一般只在商用車上使用。在我國，東風(fēng)汽車公司自 1992 年開始組織開發(fā)ABS，并于 1995 年 12 月通過技術(shù)鑒定。四川車安技術(shù)開發(fā)公司研制的 “ 車安 ”牌 ABS，已經(jīng)在部分微型車上使用。 ABS 已成為 20 世紀汽車科技的主流，所有汽車都配置 ABS 的時代已經(jīng)為期不遠。著名馬克思主義教育家馬卡連柯在談到人的自制力時曾經(jīng)比方說： “ 沒有制動器就不可能有汽車 ” ?？梢?，汽車的制動系統(tǒng)與人自制力一樣，都是須臾不可離開的東西。但是，傳統(tǒng)的制動系統(tǒng)雖然可以起到緊急剎車的作用， 卻容易導(dǎo)致汽車輪胎的抱死。當輪胎被抱死之后，由于慣性，汽車仍然會在路面上滑行一段距離。輪胎由滾動變?yōu)榛校ゲ料禂?shù)增大，附著系數(shù)降低，汽車橫向位移，極易導(dǎo)致磨損、爆胎、側(cè)滑、甩尾等事故的發(fā)生。為了克服傳統(tǒng)制動系統(tǒng)的抱死現(xiàn)象，人們發(fā)明了 “ABS 防抱死制動系統(tǒng)（ Anti lock Braking System）。該系統(tǒng)的原理就是緊急剎車時，既保持輪胎轉(zhuǎn)動，又防止輪胎抱死，以維持最大的剎車力量；同時也對車輪進行迅速、準確、有效、安全的控制，使車輪的縱向附著系數(shù)達到峰值，側(cè)向附著系數(shù)也保持較高狀態(tài)，從而達到提高制動 速度、縮短制動距離、穩(wěn)定制動方向、防止車輪抱死的效果。 維護 一級維護的時機一般按汽車生產(chǎn)廠家推薦或規(guī)定的行駛里程或使用時間進行。一級維護的間隔里程約為 7500km15000km 或 6 個月，以行駛里程或使用時間先達到為準。一級維護由專業(yè)維修工負責(zé)執(zhí)行。其作業(yè)中心內(nèi)容除日常維護作業(yè)外，以清潔、潤滑、緊固為主，并檢查有關(guān)制動、操縱等安全部件。 失靈處理 當發(fā)生制動失效時，司機首先要保持沉著冷靜，切莫驚慌失措。正確的措施是：在根據(jù) 路況和車速控制好方向的同時迅速減檔。高速檔搶人直接檔再迅速搶人中速檔，這時發(fā)動機會有很大的牽引阻力使車速迅速降低，此時可以用手制動再迅速搶進低速檔和最低檔，然后用手制動控制車輛停住。如手制動效果不好也可利用山坡迫使車輛停下或低速控制車輛至平坦路段逐漸停下。上坡制動失效時應(yīng)適時減入中、低速檔。保持足夠的動力駛上坡頂停車。如需半坡停車，應(yīng)保持前進低檔位，拉緊手制動，隨車人員及時用石塊、墊木等物品卡住車輪，如有后滑現(xiàn)象，車尾應(yīng)朝山坡或安全一面，并打開大燈和緊急信號燈以引起前后車輛的注意和避讓。這里，要 指出的是那種不減速就直接往山坡上靠的措施是極其危險的，高速劇烈的刮撞會直接損壞車輛并容易被山坡反彈造成碰撞和翻車，而且很多路段并沒有山坡，所以利用發(fā)動機牽引阻力來控制車速才是明智和正確的，而現(xiàn)代車輛的變速同步裝置也給快速強行搶檔提供了方便性和可靠性。 此外，值得提及的是車輛在下長坡，陡坡時不管有無情況都應(yīng)輕踩一下制動，它的好處在于一是檢驗一下制動性能，二是一旦發(fā)現(xiàn)制動失常可以贏得控制事故的時間，減少驚慌情緒，做到冷靜控制車輛。其實這也稱之為預(yù)見性制動。您千萬可別小看這一腳預(yù)見性制動，車輛在行駛中各種故障都有 可能發(fā)生，制動失效也不例外，預(yù)見性制動可使我們在突發(fā)故障時化險為夷，轉(zhuǎn)危為安。 動力性 我們在進行汽車交易的過程中，必須要進行路試，然而，在路試的過程中必須要考慮到車輛的動力性，那么，什么是汽車的動力性呢？ 汽車的動力性就是指汽車在良好的路面上進行直線行駛的過程，可以由縱向的外力來進行決定相應(yīng)的行駛性能，是能夠達到平均行駛速度的要求。我們從這個定義當中就可以看出，對于道路來說，必須要是良好的路面，水平或是坡路都可以，運動方式可以采取直線行駛的過程，對于外力因素來說，可以由縱向的外力來決定運動的基礎(chǔ)，使其能夠達到一定的能力。對于運動能力來說，主要有三個方面的指標，比如汽車的最高車速，加速時間，以及 最大爬坡度 。在良好的水平路面上進行行駛的車輛，如果能夠達到最高的行駛速度，我們就叫最高車速。對于加速時間來說，通常是在 原地起步的加速時間，以及超車加速的時間，這個時間表明了汽車的加速能力。 “t” 表示原地起步的時間，一般都是一檔或是二檔進行起步，逐漸進行換檔位處理，如果行駛到一定的預(yù)定距離時，車速所需要的時間。就是原地起步的時間。超車的加速時間也可以用 “t” 來進行表示，最高的次高檔位的一些車，其車速在 30 或是 4 左右，全力加速要在一些高速路上所用的時間表示。 發(fā)展方向 （ 1）我國較好的經(jīng)濟環(huán)境為汽車零部件行業(yè)的持續(xù)發(fā)展提供有力保障 現(xiàn)階段，經(jīng)濟全球化帶動的國際產(chǎn)業(yè)分工有利于我國在全球配置資源；我國消費結(jié)構(gòu)升級帶動產(chǎn)業(yè)結(jié)構(gòu)升級和城市化發(fā)展等內(nèi)需因素增長強勁；我國經(jīng)濟體制改革進一步加快，政府在市場經(jīng)濟條件下的宏觀調(diào)控能力和水平不斷提高。這些長期有利因素將支撐我國宏觀經(jīng)濟進入新一輪上升期，為汽車零部件行業(yè)的持續(xù)發(fā)展提供有力保障。 （ 2） 汽車行業(yè)的快速發(fā)展帶動了我國汽車零部件行業(yè)的發(fā)展 未來幾年我國汽車產(chǎn)銷仍將保持較高的增長速度，汽車保有量也將持續(xù)增長，這為我國汽車零部件產(chǎn)業(yè)提供了一個廣闊的發(fā)展空間。 （ 3）產(chǎn)業(yè)政策促進了我國汽車零部件行業(yè)的發(fā)展 近年來，我國加大了對汽車零部件行業(yè)支持的力度。 “ 汽車關(guān)鍵零部件開發(fā)制造 ” 被列入了當前國家重點鼓勵發(fā)展的產(chǎn)業(yè)、產(chǎn)品和技術(shù)目錄（ 2000 年修訂）。 2005 年 4 月 1 日起執(zhí)行的構(gòu)成整車特征的汽車零部件進口管理辦法規(guī)定， “ 對具有整車特征的進口零部件將按整車征稅。其中對汽車 制動系統(tǒng) （制動主缸或氣制動 閥、助力器總成、前制動器總成、后制動器總成、防抱制動系統(tǒng)ABS 的閥體和 ECU 總成）達到或超過進口件總界定數(shù)量 4，即視為構(gòu)成總成 (系統(tǒng) )特征 ” 。該規(guī)定有利于提高汽車制動系統(tǒng)產(chǎn)品的國產(chǎn)化率，而且跨國汽車公司和零部件企業(yè)為了減少進口關(guān)稅，降低成本，也將增大在我國的生產(chǎn)、采購份額。 2006 年 12 月，國家發(fā)展和改革委員會發(fā)布了國家發(fā)展改革委關(guān)于汽車工業(yè)結(jié)構(gòu)整意見的通知，該政策的實施有利于汽車零部件行業(yè)的有序發(fā)展及結(jié)構(gòu)調(diào)整。 （ 4）全球化采購為我國汽車零部件行業(yè)提供了新的發(fā)展機遇 在汽車產(chǎn)業(yè)全球化過程中，我國汽車 零部件行業(yè)已開始融入國際大循環(huán)，進入全球采購體系。許多國際著名汽車制造企業(yè)及汽車零部件巨頭大量從我國進口汽車零部件以滿足本國的需要，這為我國汽車零部件行業(yè)提供了良好的發(fā)展機會。 （ 5）技術(shù)的發(fā)展拓寬了行業(yè)的發(fā)展空間 傳統(tǒng)汽車制動系統(tǒng)和電子化技術(shù)的結(jié)合，將是未來汽車制動系統(tǒng)產(chǎn)品的發(fā)展趨勢。擁有核心技術(shù)和自主研發(fā)能力的汽車制動系統(tǒng)企業(yè)將能獲得更大發(fā)展空間。 附錄 B： Introduction to automobile braking system and its development trend The braking system is used to make the running automobile were forced to slow down or even stop, according to the requirements of the driverAlready stopped the car in a variety of road conditions (including on the ramp) stability in car；Keep cars traveling downhill speed stability. Of automobile braking effect is only role and direction in the car and the car moving in the opposite direction of the external force, and the size of these forces are random, not to control, so the car must be installed on a series of special device to achieve the above functions. Automobile brake system is to point to in order to ensure the safety of car driving on the technology, improve the average car amazing speed and so on, and installed in the car braking device special brake mechanism.In general automobile brake system consists of two sets of independent of the crane brake and parking brake system of the device.Which is by the driver of the crane brake system to manipulate with their feet, therefore is also called the foot brake.Parking brake is by the pilot operated with the hand, so it is also called hand brake device. Function is to make the running of the crane brake system in the car to slow down or stop in the shortest distance.And the function of the parking brake is already stopped in all kinds of keeping the car on the road.However, sometimes in an emergency situation, two kinds of brake device can be used at the same time the increase of automobile braking effect.Some of the special purpose vehicle and often cars traveling in the mountains, long-term and frequent braking will lead to overheating of the crane brake system, therefore on these cars tend to add various types of auxiliary braking device, so that a stable speed in the downhill. According to the braking energy situation, the braking system can also be divided into human brake system, dynamic braking system, and three kinds of such as servo brake system.Human brake system in the drivers physical strength as the braking energy；Power brake system with engine power conversion by pneumatic or hydraulic pressure as the braking energy；And servo brake system is the combination of human and engine power as the braking energy.In addition, according to the braking energy transmission way, brake system and can be divided into mechanical, hydraulic, pneumatic and electromagnetic wait for a few kinds. In the car braking system, brake is used to produce automobile brake system to prevent vehicle movement or movement trend of the force components.At present, the species used in automobile brake friction brake, is to prevent vehicle movement of brake torque is derived from the fixed element and rotating friction between the work surface. In the form of classification Drum brakes Drum brake is a kind of traditional braking system, its working principle is to describe vividly in a coffee cup. The brake drum is like a coffee cup, when you The five fingers into the rotating coffee cup, the finger is brake pads, as long as you will be five points to an outside, wall friction of coffee cup, coffee cup will stop rotating. Drum brakes on the car simply by the brake oil pump, piston, brake pads and tympanic cavity, stopped by the brake wheel cylinder of high pressure brake oil moves the pistons, exert forces on two pieces of brake shoe half moon, make its pressure tympanic cavity wall, on the friction to stop the brake drum rotation so as to achieve the effect. A disc brake Also, the working principle of disc type brake can be used to describe a plate, you with your thumb and forefinger rotating plate, plate will also cease to rotate. The car disc brake is by the brake oil pump, a connected with the wheels of the brake disc and disc brake calipers. When braking, high pressure brake fluid drive piston calipers, brake shoe pressure to the brake disc brake effect thereby. Disc type brake disc type brake disc brake, sometimes called it points common disc brake and disc brake two ventilation. Ventilated disc brake is set aside a gap between two pieces of brake disc, make the air flow through the gaps in some ventilated disc also drill out many circular vent on disk, or on the disk cut out of the tank ventilation or precast rectangle hole. Ventilated disc brakes with romantic role, the cold and hot effect is better than ordinary disc brake.Main advantage of a disc brake is in high speed brake brake quickly, cooling effect is better than that of drum brake, the braking performance of constancy is good, easy to install the advanced electronic equipments like ABS. The main advantage of the drum brake is the brake shoe wear less, low cost, easy maintenance, due to the absolute braking force of drum brake is much higher than disc brakes, so widely used in the rear wheel drive truck Disc brake In recent years, the car speed is improving, growing total weight of the truck and bus.In addition, the cars centre of gravity is generally lower and widely used in the cross section of the small diameter wide tires, make brake installation location is restricted, so in the thermal stability of used on heavy duty truck and car brake can better the increasing range of disc brake.The disc brake can be divided into pliers disc brake and full brake two kinds. Electronic control unit ABS anti-lock braking system is a kind of automobile electronic system, it includes a electronic control unit, a number of wheel speed sensor and an embedded electronic valve valve assembly.Electronic control unit through the wheel speed sensor of pulse changes to grasp the operation condition of the wheel.When one wheel may produce lock, electronic control unit will send instructions to electronic valve, to make it through the rapid switch to achieve control of the brakes, the purpose of adjusting speed.In general, the rapid switch valve can be up to 12 times per second.Some advanced models of the ABS can have four sets of circuit system, namely four loop ABS.The high-tech product mainly has two types, that is, electronic and mechanical.Electronic safety coefficient is higher, the price is high, the original is configured on large luxury cars, now, small and medium-sized ordinary cars began to configuration；Mechanical safety coefficient is low, the price is low, generally only used in commercial vehicles.In our country, dongfeng automobile company organization development since 1992, ABS, and in December 1995, passed the technical appraisement.Sichuan car Ann technology development company put brand of ABS, have been used in some parts of the mini car.ABS has become the mainstream of automotive technology in the 20th century, all the car configuration ABS is of age.Famous marxist educator yves even ko when it comes to peoples self-control once say: no brake is impossible to have car.Visible, automobile braking system with self-control, is a moment not to leave things.However, the traditional brake system may have the effect of emergency brake, lock is easy to cause the car tyres.When the tire is lock, because of inertia, cars will still be a distance to slide on the pavement.Tires by rolling into a taxi, the increase of friction coefficient, adhesion coefficient is reduced, car lateral displacement, easily lead to wear and tear, flat tire, sideslip and spin the accident.In order to overcome the traditional braking system lock phenomenon, people invented the ABS anti-lock braking system(Anti - lock style System).The principle of the system is the emergency brake, keep both tire rotation, and prevent tire lock, in order to maintain maximum brake force；At the same time also on wheels for quick, accurate, effective and safe control, peak longitudinal adhesion coefficient, the wheel lateral adhesion coefficient also remain high, to improve the braking speed, shorten braking distance, brake direction stability, prevent the effect of the wheel lock. maintenance Level 1 maintenance time according to provisions of car manufacturers recommend or general range or the use of time.Level 1 maintenance interval mileage is about 7500 km15000km or 6 months, will be subject to range or use the time to achieve.Level 1 maintenance by a professional mechanic is responsible for the execution.The operational center content in addition to the daily maintenance work, give priority to with cleaning, lubrication, fastening, and check the braking security components, manipulation, etc. Failure handling When the brake failure occurs, the driver must first keep calm, dont panic.The correct measures is based on Road conditions and vehicle speed control the direction of rapid shift down at the same time.Top gear grab people directly file to rob a man medium-speed quickly, then will have a lot of traction resistance to lower the speed quickly, the hand brake can be used to quickly snapped into a low gear and the most cheap, then with the hand brake control vehicle to stop.If the hand brake effect is bad can also use the slopes forced the vehicle stop or control of the vehicle at low speed to the flat section gradually stop.Uphill brake failure should be timely reduction in medium and low gear.Keep sufficient parking power on top.Forward for the banpo parking, should maintain a low position, tighten the hand brake, the accessory personnel in a timely manner with rocks, the article such as stow-wood jammed wheel, if there is a sliding phenomenon, after the rear of the hill or security, and open the lights and emergency lights to attract the attention of the vehicles before and after and give way.Here, would like to point out that dont slow down the hillside by directly measures is extremely dangerous, high-speed severe blow into damaged vehicles and easy to rebound slopes directly cause collision and overturned, and many sections and no slope, so the use of engine traction resistance to control the speed of the cars wise and correct, and the speed of modern vehicle synchronizer to quickly grab file provides the convenience and reliability. In addition, it is worth to mention is the vehicle next long slope, slope with or without the situation should be light step on the brake, it is the advantage of a test of braking performance, the second is once found brake disorders can control the time of the accident, win reduce panic mood, calm control vehicle.It also called predictive brake.You must dont look down upon the foot brake foresight, various fault can happen on the road vehicle, brake failure is not exceptional also, predictive brake can make us in sudden failure to turn, save the day. dynamic We are in the process of automobile trading, must want to undertake road test, however, in the process of road test must take into account the power performance of the vehicle, then, what is the cars performance? Automotive dynamics is refers to in a good process of straight on the road, can be determined by the longitudinal force to carry out the corresponding driving performance and is able to meet the needs of the average speed.We can see from this definition, for road, the road surface must be good, level or what can be, the process of exercise can take straight, for external factors, the basis of motion can be determined by the longitudinal force, enable it to reach a certain ability.For athletic ability, there are three main aspects of the indicators, such as a cars top speed, acceleration time, and the maximum gradability.At the levels of good running vehicles on the road, if we can reach the highest speed, we call the highest speed.For acceleration time, usually in situ acceleration time of start, and overtaking acceleration time, this time show that the acceleration of the car.T said situ start time, is a commonly or leg to start, gradually change gear processing, if to a predetermined distance, speed the time required.Time is put off.Overtaking the acceleration time of t can also be used to say, the second-highest gear of the highest of some of the car, the speed of around 30 or 4, to accelerate to said used in some highways. The development direction (1) Chinas good economic environment for the sustainable development of automotive industry to provide powerful guarantee At present, economic globalization driven resource allocation in the international industrial division of labor is beneficial to our country in the world；Chinas consumption structure upgrade domestic demand factors such as upgrading of the industrial structure and urbanization growth is strong；To further speed up the economic system reform in our country, the government in a market economy under the conditions of macroeconomic regulation and control ability and level enhances unceasingly.These favorable factors for a long time will tend to support the macro economy of our country has entered a new round of rising, for the sustainable development of automotive industry to provide powerful guarantee. (2) the rapid development of the automobile industry led to the development of the auto parts industry in our country In the next few years Chinas auto market will continue to maintain a higher growth rate, car ownership also will continue to grow, it provides auto parts industry in China with a broad space for development. (3) industrial policies to promote the development of the auto parts industry in our country In recent years, Chinas increased support for auto parts industry.Car key parts and components development and manufacturing was included in the current national focus on encouraging the development of the industry, products and technologies directory (revised in 2000).Perform on April 1, 2