Gas faib mechanism. Yog vim li cas yog nws yuav tsum tau?

Gas faib mechanism - ib qho ntawm feem tseem ceeb ntawm lub cav, los ntawm uas qhov tseeb lag luam ntawm nws cov kev ua tau zoo nyob ncaj qha. Nws ua hauj lwm pab rau ib tug raws sij hawm sau lub tog raj kheej ntawm lub combustible sib tov los yog huab cua (nyob rau hauv lub injector thiab diesel xyaw), thiab rau ntxub cov rav cua tsheb roj cua. Muaj pes tsawg leeg muaj xws li ib tug tsav sij hawm poob ntawm lub camshaft, tej zaum nws yuav tsum yog ib tug siv, ib cov saw los yog los ntawm lub zog ntawm lub camshaft thiab cov valve mechanism. Nyob rau hauv lub caij nyoog kawg no lub cev panels yog li qub thiab rocker caj npab. Cov yav tas, nyob rau hauv lem, yog tsau mus rau lub qag li hais tias ib tus lub xub pwg raug raws li nyob rau hauv lub hloov cov ntsia hlau, thiab lub thib ob - nyob rau valve kav.

Lub camshaft yog lub axis uas machined eccentric (cam), raws li cov valve sij hawm poob ces kaum. Theem sij hawm poob - qhov no yog lub sij hawm ntawm qhib thiab kaw lub valve. Qhov no tshwm sim nyob rau lub sij hawm ntawd thaum lub tog raj kheej yog nyob rau hauv lub qaum los yog tsawg tuag taw tes. Uas yuav qhib lub valve (inlet los yog hluav taws xob) yog nyob ntawm seb tus khiav nrawm tshwm sim nyob rau hauv ib tug lub tog raj kheej.

Piv txwv li, yog hais tias tus piston yog nyob hauv qab tuag center thiab pib lub compression stroke, tag nrho cov qub raug kaw, yog hais tias qhov tso stroke, lub tso valve qhib. Nws yog ib zajlus kom xav hais tias cov moos lub voj voog ntawm cov ua hauj lwm mob stroke tag nrho li qub kuj kaw, thiab qhib lub kom tsawg inlet. Gas faib mechanism yuav muaj ib tug los yog ob tug camshafts. Gas faib mechanism OHC - qhov no yog qhov ua ntej, lub thib ob yog hu ua DOHC. Xws li ib tug kev kho yog tsuas yog siv nyob rau hauv cov tshuab rau hauv uas rau txhua tus lub tog raj kheej muaj 4 los yog ntau tshaj li qub, xws li ntawm 5 Audi.

Yog li ntawd, cov roj faib mechanism DOHC engine tso cai rau koj mus tau lub feem ntau kev ua tau zoo thiab ua rau nws tus phooj ywg environmentally thiab yig. Txhua camshaft yog tsim los mus qhib ib tug valve pab pawg neeg, yog kom tsawg lossis qhov tso pa.

Nws twb preceded by roj faib mechanism SOHC. Nws kuj muaj 4 li qub ib lub tog raj kheej, tab sis tsuas yog ib qho camshaft yog siv los qhib lawv. Tej lub sij hawm poob yog thoob plaws nyob rau hauv lub 90s, tab sis tsis ntev twb tso tseg vim hais tias ntawm nws cov tsawg productivity piv nrog DOHC.

Assembling assumes qhov tseeb qhov chaw ntawm lub camshaft txheeb ze mus rau lub crankshaft. Nws yog tiav los ntawm kev thov rau cov iav daim ntawv lo koj xav mus ua ke. Thaum siv ib txoj siv tsav , thawj teev cov Pulleys yog mus raws li daim ntawv lo, tom qab uas lawv yog tsau thiab lov sij hawm siv, uas yog ces ncav us txog nro cov menyuam.

Gas faib mechanism tsis yuav tsum tau yuav luag tsis muaj kev kho mob, nws yog txo mus rau raws sij hawm hloov ntawm lub valve clearance. Nws txhaum cai ua rau yus muaj zog coj ntawm qhov chaw thiab tsis pub lub cav los tsim nws tag nrho muaj peev xwm. Nyob rau hauv tas li ntawd, nws muaj peev xwm dai li qub, lawv yog tas li nyob rau hauv ib nrab-qhib txoj hauj lwm, thiab kev puas tsuaj mus rau lub pistons, thiab cov kev hloov ntawm txawm ib tug yuav raug nqi kim heev.