Automobile Level04-hbse-U2-S2-Replacement of Piston Rings

 

Session – 2 (Replacement of Piston Rings)

Piston Ring:-  ;g split ring gS tks fd vkarfjd ngu batu ;k stam engine esa piston dh outer diameter esa  groove esa fQV gksrk gSA

 

Q1.         Reciprocating engine esa piston ring ds D;k&D;k functions gSA

Ans.      

(i)            Combustion chamber dh bl izdkj sealing djuk fd combustion chamber ls crank rd fdlh izdkj dh gases transfer u gks ik,aA

(ii)           Piston ls cylinder walls dks heat transfer djus ds fy, support djrk gSA

(iii)          Engine oil consumption dks regulate djrk gS vkSj oil leakage dks jksdrk gSA

(iv)          Compression vkSj power stroke ds le; compression pressure cuk,a j[krk gSA  

 

Q2.         Piston clearance end gap ,side gap dh tkap dSls djksxsA

Ans.       vko';d midj.k ,ao vkStkj%& LiSuj] ekbdzksehVj vkSj Qhyj xst ¼fof/k½

(i)           okgu dks ysoy xzkamM ij [kM+k djsaA

(ii)           cSVjh dk usxsfVo VfeZuy gVk,a vkSj batu ds uhps Vªs j[ksaA

(iii)          Spanner ysdj Mªsu Iyx dks gVk,aA

(vi)          batu ls vkW;y dks iwjk oil fudyus nsa vkSj fQj Vªs dks side esa dj nsaA

(v)           jsfM;sVj gkst ikbi ls dusD'ku dks gVk,a vkSj ckgj iai dks Hkh gVk,aA

(vi)          Nult/Bolt dks <hyk djds radiator dks ckgj fudkysaA

(vii)         blds ckn okVj iai dks dismantle djsaA

(viii)        vYVjusVj vkSj LVkVZj eksVj dks ckgj fudkyus dh t:jr ugha gS] bls vyx djds pSfll ij ,d rjQ j[k nsaA

(ix)          fjax LiSuj dk iz;ksx djrs gq, uhps ls uV gVk,aA

(x)           vkW;y lEi dks gVk,aA

(xi)          VSiV doj dks gVk,aA

(xii)         vc buySV eSuhQksYM dks gVk,aA

(xiii)        14-15 dk ring spanner ysdj ¶;wy ykbu ikbi ds duSD'ku gVk,a vkSj mls ,d rjQ dj nsaA

(xiv)        batu ds ghVj duSD'ku gVk,a vkSj heaters dks <hyk dj nsaA

(xv)         23-27 dks fjax LiSuj ysdj batSDVj gVk,a vkSj mu ij flySaMj u ekdZ dj nsaA

(xvi)        Rocker arm ds bolt loose dj nsa vkSj /khjs ls rocker arm shaft dks gVk,a vkSj /khjs ls push rod dks gVk nsaA

(xvii)       Push rod dks igys /khjs ls Åij mBk,a vkSj ftlls fd mlds uhps ls tappet u fxj tk,aA

(xviii)      mlds ckn flySaMj gSM xkLdsV gVk,aA

(xix)        14-15 dk ring spanner iz;ksx djrs gq, fiLVu dks ,d DuSfDVax jkWM ds big end bearing dks <hyk djsaA

(xx)         blh izdkj fiLVu 2] 3 vkSj 4 dks dzekuqlkj gVk,a vkSj mls mfpr izdkj ls lkbM esa j[ksaA

(xxi)        fjax xzqo dks iwjh rjg ls lkQ djsaA

(xxii)       flySaMj cksj dks lkQ djsa vkSj f?klkoV dh tkap djsaA

(xxiii)      fLizax ds eqM+ko ds fy,] yEckbZ ds fy, vkSj okYo cSaM ds fy, tkap djsa vkSj ;fn t:jh gks rks okYo dh fjdaMh'kfuax djsaA

(xxiv)      vc lHkh Hkkxksa dh tkap djs vkSj mls lkQ djsaA

(xxv)       okYo Vkbfeax lsV djs] ¶;wy batSD'ku iai dh Vkbfeax lsV djsa vkSj VSisV doj dks lSV djsaA 

 

A.     End Gap:-

(i)            fiLVu fjax ysa vkSj flySaMj ds cksj esa TDC ij j[ksaA

(ii)           fiLVu fjax dk fiLVu }kjk Alignment vkSj ysoy lsV djsaA

(iii)          Feeler gauge ysa vkSj fjax ds fljksa ds chp esa mls slide djsaA

(iv)          ekbdzksehVj ysdj Qhyj xst dh eki ysaA

(v)           jhfMax dks uksV djsA

 

B.     Side Gap:-

(i)            fiLVu vkSj fiLVu fjax dks ysA

(ii)           fiLVu fjax dks fiLVu fjax xzqo esa j[kdj Qhyj xst ds lkFk MkysaA

(iii)          vc ekbdzksehVj ysa vkSj Qhyj xst dh eki ys A

(iv)          jhfMax dks uksV djsaA

 

C.     Piston Clearance:-

(i)           fiLVu dks mlds vkius flySaMj ls ckgj fudkysaA

(ii)           fiLVu dks Qhyj xst ds lkFk mlh ds flySaMj esa j[ksaA

(iii)          Qhyj xst+ dh eksVkbZ ekius ds fy, ekbdzksehVj dk iz;ksx djsaA

(iv)          ekih xbZ thickness gh fiLVu dh Dyh;jSal gSA