Qhov txawv ntawm Kev Ua Haujlwm: Lub EGas valve tswj lub cav tso pa tawm, feem ntau yog siv thaum lub cav pib- nce, ntawm qhov nrawm qis, lossis qis dua lub teeb kom pab tswj cov pa tawm thiab txo cov suab nrov thiab ib puag ncig muaj kuab lom. Nws txoj haujlwm yog coj cov pa pa tawm ntawm cov yeeb nkab, txo cov suab nrov thiab cov pa phem.
Ib qho EGR valve, ntawm qhov tod tes, tswj cov recirculation ntawm cov pa pa. Feem ntau siv thaum lub cav tsis ua haujlwm lossis qis qis, nws rov pib dua ib feem ntawm cov pa pa tawm mus rau hauv lub cev, txo nitrogen oxide (NOx) emissions kom tau raws li ib puag ncig cov qauv. Lub EGR valve tsim ib qho kev sib txuas ntawm qhov nqus thiab tso pa tawm, coj ib feem ntawm cov pa pa rov qab mus rau hauv chav combustion rau re-combustion, yog li txo NOx emissions.
Qhov sib txawv ntawm cov qauv: Ib qho EGas valve muaj cov qauv yooj yim, feem ntau suav nrog lub zog ua haujlwm, hloov pauv, thiab cov khoom siv pa tawm. Lub zog ua haujlwm tswj qhov qhib thiab kaw ntawm lub tshuab pa tawm ntawm qhov hloov mus tswj cov pa tawm. Cov pa tso pa tawm feem ntau yog cov yeeb nkab uas tuaj yeem qhib lossis kaw kom tso cov pa tawm mus rau ib puag ncig.
Cov pa roj recirculation (EGR) valve muaj ib tug complex qauv, feem ntau muaj xws li ib tug valve, ib tug recirculation yeeb nkab, thiab ib tug tsav valve. Lub valve txuas cov khoom noj thiab tso pa tawm ntawm cov yeeb nkab recirculation, thiab tus tsav valve tswj lub valve qhib thiab kaw kom kho qhov sib npaug ntawm qhov rov ua haujlwm.
Qhov sib txawv ntawm kev ua haujlwm yog nyob rau hauv txoj cai kev ua haujlwm. Lub EGR valve tswj qhov qhib thiab kaw ntawm qhov tso pa tawm ntawm lub zog ua haujlwm, yog li tswj cov pa tawm ntawm cov pa tawm mus rau hauv ib puag ncig. Thaum EGR valve qhib, cov pa tawm tuaj yeem tso tawm dawb rau hauv qhov chaw; Thaum lub valve raug kaw, cov pa pa tawm yog coj mus rau hauv cov yeeb nkab tso pa tawm.
EGR valve, ntawm qhov tod tes, kho qhov sib npaug ntawm qhov rov ua haujlwm los ntawm kev tswj qhov qhib thiab kaw ntawm lub valve ntawm tus tsav valve. Thaum lub valve raug kaw, cov pa tawm tsis tuaj yeem nkag mus rau hauv lub combustion chamber los ntawm cov yeeb nkab recirculation; Thaum lub valve qhib, cov pa tawm tuaj yeem rov qab tau - nkag mus rau hauv chav combustion rau re- combustion.
