真空助力器主缸工作原理

1、ActuationPrinciple of function真空助力器制動(dòng)主缸功能原理No Vacuum Condition無(wú)真空狀態(tài)Air Valve OpenVacuum Valve ClosedKey seated against rear shellPlunger valve seated on reaction disc空氣閥打開(kāi)真空閥關(guān)閉鍵靠在后殼體上柱塞閥頂在反作用盤(pán)上At Balance平衡狀態(tài)§ 、*.'."P十 Ambient Atmospheric Pressure、*、/么乙X/Z-/Z/ZZI/<<、<<<、&

2、lt;<ste'恿總1、u 、XWkW'、'/ /7/Z7z7z 7Z rrrf ZZZZZZZZ ZZ/</- /* /* VZzZiZZ/Z/Z4 />/> 了八JZZZzJP Working Chamber Pressure-Vacuum in front chamber pulls the diaphragm plate forward Air valve closes Vacuum valve opens Vacuum in the working chamber increases until the pressure differe

3、ntial has reduced to 'balance，the diaphragm plate with both the air and vacuum valves closed真空腔的真空吸引膜片盤(pán)向前運(yùn)動(dòng)空氣閥關(guān)閉真空閥打開(kāi)工作腔內(nèi)的真空增加，直至兩腔壓力差降低到 “平衡狀態(tài)匕 膜片盤(pán)帶動(dòng)空氣閥及真空閥全部 關(guān)閉-Vacuum Chamber PressureBrakes Applied實(shí)施制動(dòng)vz/zX/fi/Z/ZZ. 5/Z/X /> /> /V.F<0、Asz/z/zz / ZZ/Z/AP.”, Ambient Atmospheric Pressur

4、e/J P- Working Chamber Pressure-Force applied to the input rod opens theair valve-Vacuum in the rear chamber decreases,hence increasing the pressure differential-Diaphragm moves forward until the output rod force is equal to the input force multiplied by the boost ratio -Reaction disc extrudes aroun

5、d ratio disc-When the output force becomes greater than the input force multiplied by the boost ratio, the reaction disc extrudes further pushing the plunger valve back and closing the air valve茨Az-Vacuum Chamber PressureBrakes Applied實(shí)施制動(dòng)zzzZrZZZZ/在輸入桿上加力使空氣閥打開(kāi)工作腔內(nèi)的真空降低，因此兩腔 壓力差增加膜片向前運(yùn)動(dòng)，直到輸出力等于 輸入力

6、乘以助力比反作用盤(pán)擠壓包裹助力比調(diào)整盤(pán)fZZZZZz /TzTZ */-/- '1A» rZZZZM rZZZZ- r/ZZ, "/9 / / z/*V/-/> /> JZZ4rZZ/Z« </zzzA 4P“ Working Chamber PressurePrf. - Ambient Atmospheric Pressure茨Az-當(dāng)輸出力大于輸入力乘以助力比 時(shí)，反作用盤(pán)進(jìn)一步擠壓，推動(dòng)柱 塞向后退（相對(duì)閥體而言）,并將 空氣閥關(guān)閉。-Vacuum Chamber PressureAmbient Atmospheric Pressu

7、reBrakes Released 釋放制動(dòng)（減輕制動(dòng)）-Vacuum valve opens真空閥打開(kāi)-Vacuum in the rear chamber increases, hence reducing the pressure differential -工作腔真空增加，因此兩腔壓力差降低Diaphragm plate assembly returns to the 'balance，(vacuum and air valves both closed) position due to the action of the main spring在主回位彈簧的作用下，膜片盤(pán)組件

8、回 復(fù)到“平衡狀態(tài)”(空氣閥及真空閥均為 關(guān)閉狀態(tài))。Pw- Working Chamber Pressure-Vacuum Chamber PressureFlow Through a Tandem Booster雙腔助力器內(nèi)的空氣流動(dòng)情形220kx'wW.xenm、.w 、w 、z 、zVAZ*2 WWZZZZ "Z»mmumw "y wzyym.m722、a"fr>r/F"”廠""JkWZVAZVAJVASgWAZMAgZ'gZVAUZW MVAZVAZVAgggygggygZVAQgg NWZV

9、AZZgZZVAZZZVAZZgygg MVAZVAZZWf WZVAeAXWWQWggMVAZZZVAOXX&OXXQjVA'AZiaZljyuy 人 Zw2ZAZ ZZMAZ ZZZVAZZ ZVAZ'WgZVAJ'ZZZZUZJZZUWAZ'J' ZVAZVAZZZWWZZZZZZg'ZVAvA ZVAZVAZVAg'&gggggWWWWgg ZVAQgZgZZZVAZZZVAZZgygN gZZZZZCXXZVAZZZZZZZZZVAf VAWWAZ2ZQZ'gy zzvaZ、 ZJZZVAZZZVAg Z

10、ZlZVAZVAZVAg入 ZJMAZZZVAZZW ZUWXWZVAZVAW WWZVAZVAZVACXA Wg2WZVAgVAg QggZZVAZVAZVAg gg'WZVAZVAQgg ZZZg2g2g2g2 冬 5XZAZAXg2ZAXg2 八222222522Jg2Wg2Z2g2 OAMgZVAZVAZVAZZZ gZVAZVAZVAZVAZVAgy .vaU ：2xz2Z2y y w wVAZVAZVAgZgZgX*A*AX*AyXg2jMAOXXjgQ<MAkXXXXgJ<MAJ*Z LkXJXXXgjZVAJWkJ ZZZ/. m. m.廠AAX5AUmnn

11、_. .2 Wg2XZ2 g2Wg2gZ WWZZWZVAZVA WgygZZZVAZMuZ2g2Wg2g22"/V QT心 Z2ZAX WZAQZAZf VgZZVAZVACAAZVAZ 2Z2ZWg2g2 vAZVAg2gW2g.2323.2323.2g2Z.2g2S""“力“力“刀Vacuum Chamber Pressure PVAc真空腔壓力PVACWorking Chamber Pressure Pw工作腔壓力pwAtmospheric Pressure PAIW1 大氣壓力PA® LSC 115THEDR show n inbalance

12、positionLSC 115 HE DR平衡狀態(tài)示意圖Principle of function -Actuation真空助力器制動(dòng)主缸功能原理Principle of function -Actuation真空助力器制動(dòng)主缸功能原理Pic. A零件名稱PoppetFluid reservoir制動(dòng)液貯液罐Booster housing 助力器殼體Input rod 輸入桿Dilag bush 前圍板Secondary pisto第二活塞MC housing主缸缸體Primary pisto 第一活塞Vac< non return valfe 真空單向閥acuum chamber真空腔

13、Brake iluidv ac Seal真空皮碗Reaction pisto反作用桿Reaction dis 反作用盤(pán)Plunger 柱塞Vacuum piston 真空活塞 tmospheric chamber 大氣腔（工作腔）Principle of function -Actuation真空助力器制動(dòng)主缸功能原理Principle of function -Actuation真空助力器制動(dòng)主缸功能原理Pic.Boppet and springs 提升閥及彈簧Reaction disc反作用盤(pán)Sniffle hole補(bǔ)償孔Diaphragm膜片Symbolism符號(hào)Brake fluid

14、(pressure less) 制動(dòng)液(小壓力)Split lime booster - mq 助力器主怙08 bar Vak 真空I 一1二】Atmospheric大氣壓Principle of function -Actuation真空助力器制動(dòng)主缸功能原理Principle of function -Actuation真空助力器制動(dòng)主缸功能原理Principle of function -Actuation真空助力器制動(dòng)主缸功能原理 FPrinciple of function -Actuation真空助力器制動(dòng)主缸功能原理Principle of function -Actuation

15、真牢助力器制動(dòng)主缸功能原理Pic. 7See. piston move 第二活塞移動(dòng)Pic. 9Loop in range 面弧段Pic. 10Nom. control range 正?？刂品秶?FPrinciple of function -Actuation真牢助力器制動(dòng)主缸功能原理 FPrinciple of function -Actuation真牢助力器制動(dòng)主缸功能原理Pic. 11Just below kneepoint 拐點(diǎn)之下 FPrinciple of function -Actuation真牢助力器制動(dòng)主缸功能原理 FPrinciple of function -Actua

16、tion真空助力器制動(dòng)主缸功能原理Principle of function -Actuation真空助力器制動(dòng)主缸功能原理Principle of function -Actuation真空助力器制動(dòng)主缸功能原理Mam function curveCharacteristicX*! tel U 2Original diagramUEq)UIN QJnssaJd mlu-Ed50 barAufniEB tel 七5te<v und mt Kom-Volvncn 9etdt22un9(*Gc$chNindisti( 3 3.E" Druckeufbeu ca. 15 5 ber/

17、a(E)(Kennlinien -Merkmale)<1AUSSTEUeRDRUCK(D)A) ANSPRECHKRAFT8) LOOP-IN (TOl.-BEREICfC) BKV-0B6RS6T2UKG (i)-0) 90X AUSST6UER0RUC< 1 £) AUSST6U6RPUKKTF> MIRKUNGSGRADC) ABREGeiBeGTHMH) HrSTERESE.，似 RESrCRUCK 打J RQCKDROCKKRAFTK> SfRvOKRAFT1 ERHtjHTES VACUUMH) OHNE VIKWIN1J Anir«ch

18、2tit-Pru£ucg200 N(140 N)Booster input load ( N )Function at room temp / With volume displac. Application speed about 3,5 mm/s Pressure rise 15 +/- 5 bar/sA) Threshold loadB) Loop in (tolerance range)C) Boost ratio (i)D) 90 % kneepoint pressureE) Kneepoint pressureF) EfficiencyG) Beginnig of air

19、 absorbtionH) HysteresisI) 10 % residual pressureJ) Push back forceK) Auxiliary forceL) Higher vacuum levelM) Function without vacuumPrinciple of function -Actuation真空助力器制動(dòng)主缸功能原理Principle of function -Actuation真空助力器制動(dòng)主缸功能原理主要功能曲線特性曲線原始圖表(E)(D)1J Anir«ch2tit-Pru£ucg50 bar(Kennlinien -Merkma

20、le)AUSSTEUeRDRUCKAufniEB tel 七5te<v und mt Kom-Volvncn 9etdt22un9(*Gc$chNindisti( 3 3.E" Druckeufbeu ca. 15 5 ber/a助力器輸入力（N）<1室溫性能.加力速度約3,5 mm/s 升壓速度15 +/- 5 bar/sA) ANSPRECHKRAFT8) LOOP-IN (TOl.-BEREICf C) BKV-0B6RS6T2UKG (i)-0) 90X AUSST6UER0RUC< 1 £) AUSST6U6RPUKKTF> MIRKUNG

21、SGRADC) ABREGeiBeGTHMH) HrSTERESE.，似 RESrCRUCK 打J RQCKDROCKKRAFTK> SfRvOKRAFT1 ERHtjHTES VACUUM H) OHNE VIKWIN200 N(140 N)A）起始力B）圓弧段上點(diǎn)（允差范圍）C）助力比（i）D）90 %拐點(diǎn)壓力E）拐點(diǎn)壓力F）效率G）開(kāi)始抽大氣H）滯后I）10%剩余壓力J）回推力K）助力L）更高真空度M）無(wú)真空曲線Principle of function -Actuation真空助力器制動(dòng)主缸功能原理Without vacuum無(wú)真空(JEq)frlilfflajnsswjd AJElu-Ed200115011001 1 *Control range控制范圍MC 0 = 20,64 mm 100200 jInput load 輸入力(N )wbfiUEJ PWXIOJU-stoNKneepomt pressure 拐點(diǎn)壓力C) 8 + 9-Booster / 0,8 barB)