Umgaqo wokuSebenza we-Power Brake Booster

I-vacuum booster isebenzisa umgaqo wokufunxa emoyeni xa injini isebenza, nto leyo eyenza i-vacuum kwicala lokuqala le-booster. Ekuphenduleni umahluko woxinzelelo loxinzelelo lomoya oluqhelekileyo kwelinye icala, umahluko woxinzelelo usetyenziselwa ukuqinisa i-braking thrust.

Ukuba kukho umahluko omncinci woxinzelelo phakathi kwamacala amabini e-diaphragm, ngenxa yendawo enkulu ye-diaphragm, i-thrust enkulu isenokuveliswa ukutyhala i-diaphragm ekupheleni ngoxinzelelo oluphantsi. Xa uqhobosha, inkqubo yokufutha yokunyusa iphinda ilawule ivacuum engena kwi-booster ukwenza i-diaphragm ihambe, kwaye isebenzisa intonga yokutyhala kwi-diaphragm ukunceda umntu ukuba anyathele kwaye atyhale i-pedal ye-brake ngokusebenzisa isixhobo sothutho esidibeneyo.

Kwimeko engasebenziyo, intwasahlobo ebuyayo yevalve yolawulo yokutyhala intonga ityhala intonga yokulawula ivalve kwindawo yokutshixa kwicala lasekunene, kwaye izibuko levalve yokufunxa likwimo evulekileyo. Imithombo yevalve yokulawula yenza ikomityi yevalve yokulawula kunye nesitulo sevalve yomoya inxibelelane ngokusondeleyo, ngaloo ndlela ivala izibuko levalve yomoya.

Ngeli xesha, igumbi legesi ye-vacuum kunye negumbi legesi yesicelo se-booster zinxibelelana nejelo legumbi legesi yesicelo ngokusebenzisa umjelo wegumbi legesi ye-vacuum ye-piston yomzimba ngokusebenzisa i-valve ye-valve yokulawula, kwaye ihlukaniswe nomoya wangaphandle. Emva kokuba i-injini iqalisiwe, i-vacuum (uxinzelelo olubi lwe-injini) kwi-intake manifold ye-injini iya kunyuka iye ku-0.0667mpa (oko kukuthi, ixabiso loxinzelelo lomoya yi-0.0333mpa, kunye nokwahlukana koxinzelelo kunye noxinzelelo lwe-atmospheric yi-0.0667mpa ). Emva koko, i-booster vacuum kunye ne-vacuum yegumbi lesicelo liye lanyuka laya ku-0.0667mpa, kwaye babekulungele ukusebenza nangaliphi na ixesha.

Xa i-braking, i-pedal pedal icinezelekile, kwaye i-pedal force ikhuliswa yi-lever kwaye isebenze kwintonga yokutyhala yevalve yokulawula. Okokuqala, intwasahlobo yokubuya yevalve yokulawula intonga yokutyhala iyaxinzelelwa, kwaye intonga yokulawula ivalve kunye nekholomu yevalve yomoya iqhubela phambili. Xa ivalve yokulawula ityhala intonga isiya phambili kwindawo apho ikomityi yevalve yolawulo idibana nesitulo sevalve, i-vacuum valve port ivaliwe. Ngeli xesha, i-booster vacuum kunye negumbi lesicelo liyahlukana.

Ngeli xesha, isiphelo sekholomu yevalve yomoya sinxibelelana nje nomphezulu wediski yokusabela. Njengoko ivalve yokulawula intonga yokutyhala iqhubeka nokuya phambili, i-valve ye-air port iya kuvuleka. Emva kokucoca umoya, umoya wangaphandle ungena kwigumbi lesicelo se-booster ngokusebenzisa i-valve ye-valve yomoya ovulekileyo kunye nomjelo okhokelela kwigumbi lomoya lesicelo, kwaye i-servo force yenziwa. Ngenxa yokuba imathiriyeli yepleyiti yokusabela ineemfuno zepropathi ebonakalayo yoxinzelelo lweyunithi elinganayo kumphezulu woxinzelelo, amandla e-servo ayanda kwi-fixed proportion (servo force ratio) ngokunyuka kancinci kwamandla okufakwa kwevalve yokulawula intonga. Ngenxa yokunciphisa izixhobo ze-servo force, xa ubuninzi be-servo force bufikelelwe, oko kukuthi, xa i-vacuum degree yegumbi lesicelo i-zero, i-servo force iya kuba yinto eqhubekayo kwaye ayiyi kutshintsha kwakhona. Ngeli xesha, amandla okufaka kunye nemveliso ye-booster iya kwanda ngesixa esifanayo; xa i-brake irhoxisiwe, intonga yokulawula ivalve ibuyela ngasemva kunye nokuncipha kwamandla okufakwayo. Xa iqondo eliphezulu lokunyusa lifikelelwe, emva kokuba kuvulwe isivalo sevacuum, ivacuum ye-booster kunye negumbi lomoya lesicelo liqhagamshelwe, idigri yevacuum yegumbi lesicelo iya kuncipha, amandla e-servo aya kuncipha, kwaye umzimba wepiston uya kubuyela ngasemva. . Ngale ndlela, njengoko amandla okufakwayo ancipha ngokuthe ngcembe, amandla e-servo aya kuncipha kwi-fixed proportion (servo force ratio) de i-brake ikhululwe ngokupheleleyo.


Ixesha lokuposa:09-22-2022
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