Dongkang 544 Oil Collector 9.5 Diameter: Active Aeration Mitigation For Common-Rail Precision

Hauv Dongkang 544 platform- siv dav hauv nruab nrab - cov tsheb thauj khoom thiab kev tsim kho tshuab - kev sib koom ua ke ntawm Common- Rail roj system qhia txog qhov sib txawv tshwj xeeb rau kev tswj crankcase:roj vapor permeation. Tsis zoo li cov tshuab txhaj tshuaj, Common-Rail twj tso kua mis (ua haujlwm ntawm qhov siab tshaj 1,600 bar) ua kom muaj cua sov ntau, uas yog dissipated los ntawm cov roj rov qab kab. Qhov no thermal flux feem ntau ua rau micro- aeration ntawm cov roj sump, qhov twg diesel vapor condenses thiab hloov roj viscosity.

Lub 9.5 Diameter Roj Collector yog tshwj xeeb calibrated los daws qhov tshwm sim los ntawmceev deceleration. Lub 9.5mm sab hauv tsis yog choke; nws yog ib cheeb tsam tswj kev nthuav dav. Los ntawm kev txo cov pa tawm nrawm nrawm ntawm 9.5 hli apex, lub collector tso cai rau hnyav dua diesel- cov roj tee dej (qhov ntom ~ 850 kg / m³) los nag los ntawm cov roj ntws los ntawm gravitational nyob, thaum sib zog ua kom huv si - los ntawm cov pa roj mus rau kev noj. Qhov no ua kom cov roj khaws cia nws SAE 15W-40 zaj duab xis lub zog, ncaj qha tiv thaiv lub siab-siab roj twj tso kua mis tappets los ntawm ciam teb lubrication tsis ua hauj lwm.

Engineered meej meej rau Dongkang 544 (ISDe 4.5L thiab 6.7L variants nrog BOSCH CP3.3 twj), cov khoom no ua raws li cov kev ntsuas tseem ceeb hauv qab no:

Critical Orifice Diameter:9.5 hli (zoo rau qhov ntws coefficient Cv ntawm 1.8).

Mounting Xov:M22 x 1.5 (ncaj metric xov nrog ib qho kev sib xyaw tooj liab-coated sealing washer).

Filtration Media:Peb -theem cyclonic coalescer nrog sintered bronze puag txheej.

Kev khiav hauj lwm siab sib txawv:< 4.5 kPa ntawm qhov siab tshaj plaws tshuab-los ntawm ntws (180 L / min).

Thermal Soak Resistance:Mus txog 165℃(nruam mus), nrog rau qhov siab tshaj qhov siab ntawm 185℃.

Lub 9.5mm txoj kab uas hla ncaj qha correlates nrog lubStokes Number(Stk) ntawm cov khoom me me. Ntawm qhov loj me no, tus neeg sau ua tiav 94.5% kev sib cais ua haujlwm rau cov khoom loj dua 2 microns. Rau Dongkang 544, qhov no yog qhov tseem ceeb heev vim tias EGR (Exhaust Gas Recirculation) txias txias yog qhov tsis tshua muaj siab rau soot- roj agglomerates; txo cov roj pos huab los ntawm tsuas yog 5% txuas ntxiv EGR lub neej txias los ntawm kwv yees li 1,500 teev ua haujlwm.

Ib qho kev ua tsis tiav hauv cov neeg xa khoom tom qab muag rau Dongkang 544 yog "roj slinging" thaum tawm -txoj kev kev sib txuas (xws li, cov tub ntxhais kawm thiab cov tsheb thauj khoom ua haujlwm ntawm 30℃incline). Cov qauv tsim qauv tso cai rau cov roj txaws los ntawm lub rooj sib txoos rocker kom nkag mus rau hauv lub raj xa dej ncaj qha.

Qhov no 9.5 Diameter qauv suav nrog patentedinternal baffle helix-kab kis kab mob uas ua rau cov pa roj nkag mus rau hauv txoj kev cyclonic ua ntej lawv mus txog qhov 9.5mm tawm. Qhov kev tsim no tsim ib lub zog centrifugal ntawm 4G ntawm 2,500 RPM, ntws cov roj tawm sab nraud tawm tsam phab ntsa sau, qhov uas nws ntws rov qab los ntawm qhov chaw nres nkoj tshwj xeeb. Tus tsim tau zoo decouples cov roj theem hauv lub valve npog los ntawm kev sib cais efficiency, kom ntseeg tau tias kev ua tau zoo tsis hais lub cav lub cev tus cwj pwm.

Tsis tas li ntawd, cov tshuaj tiv thaiv -siphon rib tiv thaiv kev ua ntawm capillary. Hauv qhov chaw ntub dej, noo noo sib xyaw nrog tshuab- los ntawm tuaj yeem tsim cov emulsion uas thaiv cov orifices me me (piv txwv li, 8mm); lub 9.5mm txoj kab uas hla muab txaus hydraulic vojvoog rau nws tus kheej - tshem tawm cov emulsions, tswj cov pa system muaj.

Nyob rau hauv ib qho Kev Sib Tham -Rail system, huab cua- roj piv tau zoo suav nrog ECM raws li MAF (Mass Air Flow) cov ntaub ntawv sensor. Thaum cov roj pos huab hla dhau ntawm 9.5mm collector thiab nkag mus rau hauv cov khoom noj khoom haus, nws hloov cov dielectric qhov tsis tu ncua ntawm huab cua, ua rau me me sib txawv hauv MAF sensor qhov kub - zaj duab xis teb.

Los ntawm kev tswj xyuas qhov kev sib cais zoo, cov khoom siv no ua kom ntseeg tau tias qhov siab tshaj plaws combustion tseem nyob ruaj khov. Cov ntaub ntawv pov thawj los ntawm Dongkang 544 qhia tias cov cav siv cov khoom siv loj 9.5 hli raug nthuav tawm± 1.5% rail siab sib txawvThaum lub sijhawm hloov pauv hloov pauv, piv rau ± 3.5% kev sib txawv pom nrog cov chav nyob tsis zoo. Qhov no ncaj qha txhais mus rau smoother idling thiab txo "knock" thaum lub sij hawm txias pib, raws li lub injector piezoelectric actuators tau txais cov lus qhia zoo ib yam tsis muaj kev cuam tshuam ntawm qhov sib txawv ntawm huab cua ceev los ntawm cov roj vapor ntau.

Tsis zoo li tus qauv roj hmab O-rings uas degrade nyob rau hauv lub thermal cycling ntawm 544's turbocharger ze ze, chav tsev no siv lub tshuab ntxhua khaub ncaws tooj liab. Qhov pom zoo installation torque yog22 Nm(16.2 ft -lbs). Daim ntawv ceeb toom kev teeb tsa tseem ceeb: 9.5mm txoj kab uas hla vaj tsev yuav tsum muaj qhov chaw zaum huv, qhuav. Tshaj -torquing tshaj 25 Nm yuav extrude lub tooj liab ntxhua khaub ncaws sab hauv, muaj feem cuam tshuam rau qhov 9.5mm orifice thiab hloov kho cov txheej txheem siab poob. Ua ntej- torque lub tsev, tig lub cav 90 degrees kom daws tau qhov teeb meem sab hauv, thiab tom qab ntawd siv lub zog kawg.

Q1: Txoj kab uas hla 9.5 hli tshwj xeeb li cas them rau roj dilution hauv Common-Rail 544 cav?
Roj dilution tshwm sim thaum unburnt diesel hla lub piston rings thiab thins cov roj. Lub 9.5mm txoj kab uas hla tsim ib lub sij hawm nyob rau hauv ib tug tshwj xeeb lub sij hawm (kwv yees . 0.8 vib nas this) rau lub tshuab ({3}} gases nyob rau hauv lub collector. Lub sijhawm nyob hauv no tso cai rau cov khoom siv hluav taws xob sib zog ua kom vaporize thiab khiav tawm, thaum hnyav dua, cov roj ntau dua rov qab mus rau lub lauj kaub. Qhov no tiv thaiv cov viscosity los ntawm kev poob qis hauv qab qhov tseem ceeb 11.5 cSt qhov pib xav tau rau hydraulic tappets.

Q2: Kuv puas tuaj yeem nruab qhov no rau ntawm Tier 3 emission standard Dongkang 544 nrog rau lub raj cua sab nraud?
Yog lawm, tab sis koj yuav tsum cap lub qhov cua sab nraud. Chav tsev no yog tsim los rau kaw crankcase qhov cua (CCV) system routing rov qab mus rau lub turbo inlet. Rau cov tshuab qhib, lub phaj adapter yooj yim muaj, txawm hais tias peb xav kom CCV teeb tsa kom tswj tau qhov tsis zoo siab xav tau rau 9.5mm flow dynamics.

Q3: Dab tsi yog cov cim ceeb toom ntawm txoj kab uas hla tsis sib xws (loj lossis me dhau) ntawm lub cav no?
Yog tias txoj kab uas hla me dhau (<8.5mm), you will notice excessive oil seepage from the rear main seal due to positive crankcase pressure. If too large (>10mm), koj yuav pom qhov nce sai hauv cov kua qaub hauv EGR valve. Lub 9.5mm yog "qhov chaw qab zib" uas sib npaug cov roj rov qab nrog lub turbocharger lub peev xwm nqus.

Q4: Ntev npaum li cas yuav tsum tau hloov lub sintered bronze matrix?
Peb pom zoo kom hloov lub sijhawm ntawm 800 teev kev pabcuam, lossis 30,000 mais, rau chav ua tiav. Lub sintered bronze tuaj yeem ua saturated nrog soot, nce qhov sib txawv ntawm qhov siab tshaj qhov pib ntawm 4.5 kPa. Thaum lub tsev nyob mus ib txhis, lub internal coalescing efficiency degrades logarithmically tom qab 700 teev ntawm hnyav load.

Q5: Puas yog qhov no cuam tshuam rau lub cav nres (Jacobs / Exhaust nres) kev ua haujlwm?
Indirectly, yog. Los ntawm kev ua kom cov huab cua huv huv (dawb ntawm cov roj seem), cov pa roj carbon monoxide tsawg dua li qub. Tsis tas li ntawd, qhov ruaj khov crankcase siab tswj los ntawm 9.5mm orifice ua kom lub tsheb ciav hlau valve ua haujlwm yam tsis muaj kev cuam tshuam hydraulic, tswj 100% braking efficiency ntsuas rau 544.

Q6: Vim li cas thiaj muaj qhov dej me me nyob hauv qab ntawm lub tsev khaws khoom?
Qhov ntawd tsis yog qhov chaw xau; nws yog qhov "vacuum break" qhov. Nws tiv thaiv cov nyhuv siphon los ntawm qhov tshwm sim thaum lub cav kaw tam sim ntawd. Yog tias cov roj tau daig rau hauv lub baffle sab saud, nws tuaj yeem maj mam poob rau hauv qhov kev noj tom qab kaw, ua rau muaj kev pheej hmoo "hydraulic lock". Lub qhov dej no tso rau sab sauv hauv qab 30 vib nas this tom qab- kaw.

 

Txhawm rau ua kom koj qhov kev yuav khoom tau yooj yim thiab yooj yim, peb muab ntau yam kev xaiv them nyiaj ruaj ntseg:

Peb nyob ntawm no los ua kom koj cov txheej txheem xaj kev txhawj xeeb-dawb - xaiv txoj kev them nyiaj uas ua haujlwm zoo tshaj rau koj!

 

 

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