【正文】 在管接頭、密封圈、油封等處；齒輪齒條的間隙可通過調(diào)節(jié)螺釘予以調(diào)整。（2）轉(zhuǎn)向盤轉(zhuǎn)動靈活，操縱輕便，無阻滯、擺振現(xiàn)象。（4）轉(zhuǎn)向盤的轉(zhuǎn)向力和自由行程在規(guī)定范圍內(nèi)。（6）轉(zhuǎn)向節(jié)及轉(zhuǎn)向臂、轉(zhuǎn)向橫（直）拉桿及球銷應(yīng)無裂紋和損傷，并且球銷不得松曠。（8）轉(zhuǎn)向輪定位正確。結(jié)論汽車電子化已成為當(dāng)前的熱點(diǎn)，電子信息技術(shù)和汽車制造技術(shù)逐步走向融合，電子技術(shù)讓汽車轉(zhuǎn)向系統(tǒng)到達(dá)一個新的領(lǐng)域?？梢灶A(yù)料，隨著我國汽車技術(shù)的進(jìn)步，汽車電子新技術(shù)必將會得到越來越廣泛的應(yīng)用，國產(chǎn)汽車電動轉(zhuǎn)向系統(tǒng)也必將走向成熟。參考文獻(xiàn)[1] 林逸，施國標(biāo)．汽車電動助力轉(zhuǎn)向技術(shù)的發(fā)展現(xiàn)狀與趨勢[J]．公路交通科技，2001．．[2] 劉波，朱俊A16汽車轉(zhuǎn)向系統(tǒng)維修實(shí)例[J]．科技文獻(xiàn)，．[3] ．汽車轉(zhuǎn)向懸架制動系統(tǒng)使用與維修問答[J]．金盾出版社．.．[4] 譚本忠．看圖學(xué)修汽車轉(zhuǎn)向系統(tǒng) [J]．.[5] 郭麗萍．電動式動力轉(zhuǎn)向系統(tǒng)(EPs)原理淺析[J]．城市公共交通，2003．6．[6] 苗立東，等．汽車動力轉(zhuǎn)向技術(shù)發(fā)展綜述[J]．長安大學(xué)學(xué)報(bào)，2004，1．[7] 石美玉，等．汽車轉(zhuǎn)向[J]．化學(xué)工業(yè)出版社，2005．6．附 錄PrefaceIn recent years, along with the social life of car motorization, increasing quantities, cause the traffic situation intricate, make drivers to offer the operating frequency increases, driving you need to lighten the fatigue, improve manipulation portability and flexibility, and thus power steering system requirements for more and more is also high. So far, automotive steering system through the traditional mechanical steering system, hydraulic steering system and electric hydraulic steering system and electric power steering system four stages of development, the future is likely to wire control power steering system development. Now automotive steering system is in hydraulic steering system and electric hydraulic steering system to electric power steering system development stages of transition [1]. the traditional mechanical steering system Traditional mechanical steering system (MS) mainly by steering control agencies, steering gear and steering transmission mechanism 3 parts. Steering control mechanism is the pilot control redirector work institutions, including the steering wheel at the input from ponents. The steering wheel steering is ing from torque according to certain transmission amplifier and output increases force device, steering the earliest USES is the worm type, later have a screw nut type, rackand pinion type, circulation ball type and other forms. Steering transmission mechanism is passed to the output torque steering steering wheel agencies, including the steering wheel from pitman arm of ponents [2]. When the car needs to change directions, the pilot through turned the steering wheel, steering moment, steering, via steering shaft, horizontal bars and straight bars such as the steering trapezoid arm parts, and to make the day deflection change of direction. Traditional mechanical steering system is the advantage of simple structure, reliable operation, the production cost is low. Its defect is also very obvious: (1) with the bus speed improvement and automotive quality increases, steering control, turning to more and more demanding increased the difficulty. (2) is the ratio is fixed, namely Angle transfer characteristics, cause the car can39。 While the car is a high speed, steering control unit control motor output smaller torque, such drivers in manipulating the steering wheel is more stable. Due to the speed adjustable motor, can instantly shut, pared with hydraulic steering system, it saves engine fuel consumption, improve the economy. Electrohydraulic power steering system although in hydraulic steering system basis of technology has greatly improved, but the existence of hydraulic equipment are still made the system, such as the hard to overe shortings existing oil leakage, not easy installation and maintenance, etc. Although realized the change, but the dynamical characteristics in hydraulic booster system based on electronic control device increased again, making the system structure is plex, cost increases. Because electrohydraulic steering system technology, may realize the mature electroniccontrolled system integration, vehicle as traditional hydraulic steering system to electric power steering system of intermediate technology of transition, in certain time will continue to receive applications and development. electric power steering system (EPAS or EPS) Electric power steering system is the traditional mechanical steering system foundation, increased sensor device, electronic control devices and steering mechanism, etc. Its characteristic is to use electric actuators in different driving conditions for pilot provide appropriate support. System mainly consists of the electronic control unit ECU, torque sensor, the wheel speed sensors, motor, clutch and the steering assembly etc. Electric power steering system working principle is: the pilot control steering, the sensor will pilot role in steering wheel torque signal, speed signal, engine speed signal input ECU, ECU of the input signal calculations, inquires the booster form, determine the size and direction target current, so as to control motor current and the direction, by slowing institutions and clutch motor torque transfer to steering mechanism will be, so as to provide the proper power。t turn circumstances, motor doesn39。s steering data, then through the data bus would signals to the ECU, and getting feedback from steering control system [7] mand. Steering control system is also obtained from steering control agencies, and the steering instructions drivers from steering system obtain wheel situation, thus mand the steering system of sports. Steering system KongZhiChe cycle to need Angle, and will wheel corner and rotational torque feedback to the rest of the system, such as steering control agencies, in order to make drivers get way feeling, the size of the road are according to different conditions can be controlled by steering control system. The steering system has many advantages [8] : (1) the intervene problem to eliminate steering。s total decorate。 (4) can be personalized land suitable for specific driver and driving environment, and steering behavior could be about driving through software to realize。t hurt the driver set to prevent injury institutions。 　　至今，汽車轉(zhuǎn)向系統(tǒng)經(jīng)歷了傳統(tǒng)機(jī)械轉(zhuǎn)向系統(tǒng)、液壓助力轉(zhuǎn)向系統(tǒng)、電液助力轉(zhuǎn)向系統(tǒng)和電動助力轉(zhuǎn)向系統(tǒng)4個發(fā)展階段，未來則可能向線控動力轉(zhuǎn)向系統(tǒng)發(fā)展。 　1 傳統(tǒng)機(jī)械轉(zhuǎn)向系統(tǒng) 　　傳統(tǒng)機(jī)械轉(zhuǎn)向系統(tǒng)（MS）主要由轉(zhuǎn)向操縱機(jī)構(gòu)、轉(zhuǎn)向器和轉(zhuǎn)向傳動機(jī)構(gòu)3部分組成。轉(zhuǎn)向器是把方向盤傳來的轉(zhuǎn)矩按一定傳動比放大并輸出的增力裝置,轉(zhuǎn)向器最早采用的是蝸輪蝸