外文翻译-汽车防抱死系统设计-汽车设计(编辑修改稿)

外文翻译-汽车防抱死系统设计-汽车设计(编辑修改稿)内容摘要：

the 1mm order to avoid the water,the putty,the dust to the sensor influence,before the installment,should the sensor replenishment solenoid valve uses in wheel brake39。 s pressure four channel braking system,a vehicle rim has a solenoid valve。 Three channel braking system,each front wheel has one,two two trailing wheels use in mon solenoid valve has three hydraulic pressure holes,separately applies the brake with the brake master cylinder and the wheel to divide the cylinder to be connected the brake with the brake master cylinder and the wheel to divide the cylinder to be connected,and can realize pressure lifting,pressure maintenance,the pressure drop accent to press the principle of work is as follows: 1)Pressurerise when the solenoid valve does not work,the brake master cylinder connection and applies the brake to divide the cylinder connection respectively to go the main spring intensity is big,makes charging valve openning,the brake pressure to increase. 2)pressure maintenance,when wheel39。 s brake divides in cylinder39。 s pressure grows to certain value,charging valve cutoff support maintains at the pound state,three panels seal,maintain the brake pressures mutually. 3)voltage dropping,when the solenoid valve works,the support overes two spring39。 s tension,opens the discharge meat to cause to apply the brake to divide cylinder presure the pressure reduces,the solenoid valve transformes to the pressure maintenance condition,or pressurerise ready condition. The control device ECU primary mission is the signal which passes on various wheel39。 s sensor carries on the putation,the analysis,the enlargement and the distintion,outputs again from thc output stagc thc mand signal thc soloid valvc,carrics out thc brac pressure adjustment electronic control,by four major part is posed,input level A,conteoller B,output stage C,constant voltage and protective device controller by 4101tz frequency actuation solenoid valves,this is the polot is unable to kind of single parameter control mode ABS,because the structure is simple,the cost is low,thereforce the present use is broad. Mostly has provided this kind of single parameter control mode ABS in the American Chrysler custom is loaded with a round fast sensor on passenger vehicle39。 s four installment has 45 teeth or 100 tooth39。 s tooth rings on the axle tree,turns a fast sensor39。 s sending attite to go against in the tooth the wheel totates,causes the sensor to produce the voltage siglae unceasingly,and input the puter,the ideal speed pares with RoM,figures out wheel39。 s speedup or the deceleration,issues 西安工程大学毕业设计英文译文 6 pressurerise or the release of pressure instruction to the solenoid valve,controls applies the brake to divide the cylinder braking force. problems by used the ABS system (1)replaces the brake or the replacement hydraulic pressure braking system part,should arrange only in brake line39。 air,in order to avoid influence braking system39。 s normal work. (2)is loaded with the ABS automobile,every year should replace a brake ,the brake fluid water absorbability is very strong,after the watery,not only will reduce the boiling point will have the corrosion, will also create the brake potency decline. 3)inspects the ABS antilock braking system to cramp out the power source frrst. of development Uses the logical threshold value control algorithm may avoid a series of numerous and diverse theoretical analysis and to some element of certainty quota measurement. Simplified controller39。 s design because moreover on1y need determine wheel39。 s angular speed is advantageous realizes therefore the load cost is low. This algor hm already drew close maturely for current automobile ABS system universal usebut it by no means best control algorithm. Because under the different state of roads each kind of threshold value and guarantees presses the time is the empirical value which obtains after the repeated test does not have the very explicit theory basistherefore the ABS development39。 s cycle is longand the control quality guaranteed with difficulty. Easy to realize the stepless control based on the glide rate control algorithmand has the very explicit theory to instructbut present restricts the cost question which its development the bottleneck is mainly realizes believed according to ours research om now on ABS control algorithm development direction in the following several aspects. (1) aims at current widely uses the logical threshold value control algorithm which exists the research can track the road surface characteristic changecauses the ABS each performance index to be at the optimum condition throughout the control algorithm. And the predictive control technology is worth taking seriously. Because when the brake process iction characteristic between the tire and the road surface causes the antilock braking system has the very obvious m。