Kev ceev faj rau kev siv urea hauv tsheb

1. Tsis tu ncua xyuas cov tshuaj urea hauv lub tank urea, thiab ntxiv cov tshuaj urea hauv lub sijhawm. Tus nqi ntawm urea tov siv nyob rau hauv tsheb yog 3 feem pua ​​-8 feem pua ​​ntawm cov diesel noj. Raws li cov lus qhia, tus nqi ntawm cov tshuaj urea yog kwv yees. Yog tias tsim nyog, nqa urea txaus nrog lub tsheb.

2. Thaum sau cov tshuaj urea rau cov tsheb, yuav tsum tau siv cov yeeb nkab tshwj xeeb los tiv thaiv kev sib xyaw ntawm sundries.

3. Tom qab sau cov tshuaj urea, kaw lub hau ntawm lub tank urea kom tsis txhob muaj cov pa phem hauv huab cua nkag mus thiab ua rau cov urea deteriorate los yog crystallize.

4. Lub tsheb urea tov yog alkaline thiab corrosive rau ib qho twg. Nws yuav tsum raug zam tias lub tsheb urea tov yog txuas nrog cov hlau (tshwj tsis yog cov hlau tsis muaj steel). Cov ntaub ntawv no yuav hnov ​​​​mob nrog cov kab mob ammonia hauv lub tsheb urea tov los tsim cov khoom sib txuas uas cuam tshuam rau kev ua haujlwm SCR.

5. Thaum lub sij hawm kev thauj mus los thiab khaws cia cov tshuaj urea rau cov tsheb, lub teeb thiab kub yuav tsum zam, thiab kev thauj mus los thiab cia kub yuav tsum yog -5 degree -25 degree . Thaum cov tshuaj urea rau lub tsheb nyob ntawm qhov kub ntawm -11 degree, urea crystals yuav precipitated. Thaum ntxiv urea tov, siv<30°C warm water to dissolve the crystals, which will not affect the normal use of the urea solution for vehicles.

6. Kev noj cov tshuaj urea rau cov tsheb muaj feem xyuam nrog kev siv roj thiab kev siv hluav taws xob hauv SCR, thiab tsis muaj dab tsi cuam tshuam nrog lub hom phiaj ntawm urea. Tus nqi ntawm urea txhaj los ntawm urea muab tub lim yog tswj los ntawm lub cav ECM. Raws li cov ntaub ntawv xa mus los ntawm NOx sensor, lub tso pa kub sensor thiab urea siab sensor, EMC tswj lub twj tso kua mis urea siv lub injector los txhaj urea rau hauv cov yeeb nkab tso, qhov twg nws sib npaug nrog lub cav tso pa thiab chemically reacts ntawm cov cab kuj ntawm lub silencer los ntxuav cov pa pa.

Qee lub sij hawm EMC tsis zoo sib xws nrog cov sensors, urea twj thiab nozzles, uas tuaj yeem yooj yim ua rau muaj kev tsis sib haum xeeb ntawm cov urea txau thiab tso pa tawm, uas tsis yog tsuas yog ua rau cov kua dej pov tseg xwb tab sis kuj ua rau muaj kuab paug ntau dhau. ntawm huab cua.

7. Tsis txhob tua lub tsheb tseem ceeb rau tsawg kawg 30 vib nas this nrog lub cav tawm, SCR system yuav tso cov khoom seem ntawm lub tsheb urea hauv cov yeeb nkab kom tsis txhob muaj crystallization thaiv cov nozzles.

8. Lub tsheb-mounted SCR system yog nruab nrog lub tshuab cua sov, uas yog tswj los ntawm urea txhaj tshuaj tswj chav (DCU), uas tuaj yeem ua kom muaj kev ua haujlwm zoo ntawm SCR system nyob rau hauv ib puag ncig ntawm -30 degree, thiab tsis tas yuav txhawj xeeb txog crystallization ntawm urea tov rau tsheb nyob rau lub caij ntuj no.

9. Lub urea tank sensor tsuas tuaj yeem paub qhov kub thiab qib ntawm cov tshuaj urea, tab sis tsis tuaj yeem kuaj pom qhov zoo ntawm cov tshuaj urea. Lub urea tank sensor ntawm qee cov qauv muaj qee qhov kev nco ua haujlwm rau cov ntsiab lus ntawm cov tshuaj urea, thiab kev hloov pauv ntawm cov tshuaj sib txawv ntawm cov tshuaj urea yuav qhia rau lub khoos phis tawj on-board (ECU) kom tshaj tawm lub tswb, yog tias qhov no tshwm sim, koj tuaj yeem tiv tauj lub khw 4S cuam tshuam los txhim kho qhov system. Lub tswb no tsis txiav txim siab qhov zoo ntawm cov tshuaj urea.

10. Lub urea injector ntsia rau ntawm txhua lub tsheb yog nyob rau hauv ib-rau-ib tsab ntawv nrog lub urea txhaj tshuaj tswj unit (DCU), thiab yuav tsum tsis txhob siv interchangeably.

11. Lub lim yuav tsum tau ntxuav tsis tu ncua kom tswj tau qhov kev txhaj tshuaj ib txwm muaj. Lub lim dej tu thiab hloov lub voj voog yog 50, 000 mais lossis 1, 000 teev. Thaum cov tshuaj urea aqueous muaj kuab paug, lub neej ntawm cov lim yuav luv luv.

12. Lub crystallization ntawm urea kua yog ib qho tshwm sim, tab sis nws tsis tuaj yeem ntxuav nrog cov tshuaj ntxuav. Kev lag luam muaj cov tshuaj ntxuav tu yuav ua rau cov khoom tseem ceeb catalysts hauv SCR system. Qhov kev daws teeb meem zoo tshaj plaws yog siv cov dej kub los yaug, uas yuav tsis ua rau SCR system puas tsuaj, tab sis kuj tshem tawm cov muaju.

13. Qhov tsis ua haujlwm ntawm SCR system yuav tsis cuam tshuam rau kev ua haujlwm ib txwm ntawm lub cav, tab sis yog tias SCR tsis ua haujlwm txuas ntxiv mus ntev, nws yuav ua rau cov pa tawm ntau dhau ntawm tus qauv. Lub sijhawm no, lub teeb pom kev emission (MIL) ntawm lub ntsuas ntsuas vaj huam sib luag yuav teeb.

Nyob rau hauv qhov kev tshwm sim ntawm ib tug loj tsis ua hauj lwm, lub tsheb yuav qhib lub cav torque limiter kom txo tau lub cav fais fab.

Tsis tas li ntawd, ua ntej SCR catalytic muffler, urea crystallizes tiag tiag, uas yuav thaiv lub qhov tso pa tawm, ua rau lub siab rov qab ntawm lub qhov tso pa tawm, ua rau muaj roj ntau ntxiv.