Lub raj xa dej muffler yog ib feem ntawm lub cav tso pa tawm.Cov pa tawm muffler yeeb nkab feem ntau suav nrog cov pa tawm manifold, tso pa tawm thiab muffler.Feem ntau, peb lub calibration catalyst los tswj cov emission ntawm lub cav pa phem kuj tau nruab rau hauv lub tso pa tawm.Cov yeeb nkab tso pa feem ntau suav nrog cov yeeb nkab tso rau pem hauv ntej thiab cov yeeb nkab rov qab.

Tom qab cov huab cua ntshiab thiab cov roj av sib xyaw rau hauv lub cav rau kev sib txuas, cov cua kub thiab cov cua kub siab yog tsim los thawb lub piston.Thaum cov roj hluav taws xob tso tawm, nws tsis muaj nuj nqis rau lub cav lawm.Cov roj no dhau los ua cov pa hluav taws xob thiab tawm ntawm lub cav.Tom qab tso tawm los ntawm lub tog raj kheej, cov pa pa nkag mus rau hauv cov pa tawm manifold.Tom qab lub tso pa tawm ntawm txhua lub tog raj kheej tau sau, cov pa pa tawm tawm los ntawm cov yeeb nkab tso tawm.

Raws li cov kev cai tiv thaiv ib puag ncig yog nruj heev rau cov qauv tsheb emissions, tsis hais idling, accelerating, low-speed driving, high-speed driving or decelerating, tag nrho cov tsheb yuav tsum tau raws li cov qauv emission.Nyob rau hauv lub ntsej muag ntawm cov kev txwv nruj, ntxiv rau kev ua tiav qhov sib npaug ntawm kev ua tau zoo thiab emission, tib yam yog catalytic converter.Lub catalytic converter feem ntau yog ua los ntawm cov hlau tseem ceeb, suav nrog oxidation catalyst, txo cov catalyst thiab peb-txoj kev catalytic converter siv nyob rau hauv ntau lub tsheb.Tom qab cov pa tawm manifold, lub catalytic converter txuas nrog los hloov cov kuab paug tsis tiav rau hauv cov khoom tsis zoo los tiv thaiv ib puag ncig.

Nws txuas nrog lub muffler los ntawm catalytic converter.Qhov seem ntawm lub muffler yog ib puag ncig los yog oval khoom, uas yog welded nrog nyias steel daim hlau thiab ntsia rau hauv nruab nrab los yog rear ntawm lub tso pa system.Muaj ib tug series ntawm baffles, chambers, orifices thiab kav nyob rau hauv lub muffler.Qhov tshwm sim ntawm kev cuam tshuam acoustic cuam tshuam thiab kev tshem tawm yog siv los maj mam ua kom lub suab tsis muaj zog, thiaj li cais tawm thiab txo qis lub zog pulsating tsim txhua zaus lub valve qhib.