Bosch 4+4 Nozzle Injectors 0445120287=0445120288=0986435624=A4710700587=A4710700387=A4710700588=A4710780245=A4710701187=A4710701287— Precision Rebuilt For High-Pressure Common Rail Systems

Nyob rau hauv kev txhaj tshuaj rail, nozzle tsim tsis yog hais txog atomization; nws dictates combustion stability, emission stratification, thiab acoustic kev nplij siab nyob rau hauv tag nrho cov load daim ntawv qhia. Bosch 4+4 injector series - encompassing cuaj qhov tseem ceeb OEM cov ntaub ntawv - ntiav ibplaub-inlet + plaub-orificeinternal flow geometry uas decouples pilot txhaj precision los ntawm lub ntsiab txhaj tshuaj kom muaj nuj nqis. Qhov kev xaiv tsim vaj tsev no ncaj qha hais txog qhov tsis sib haum xeeb ntawm Euro VI / EPA Tier 4 lub voj voog ib ntus: micro-pilot stability qis dua 2.5 mm³ / stroke thiab tag nrho - thauj khoom ntau tshaj 85 mm³ / stroke yam tsis muaj kev cuam tshuam cov tshuaj tsuag qhov nkag.

Tsis zoo li cov pa VCO lossis mini-sac nozzles uas cuam tshuam ntawm kev xau- tus nqi qis thiab cov tshuaj tsuag lub khob hliav qab, 4+4 platform siv lubsacless pilot chambernrog rau siab metering orifices. Qhov tshwm sim? Pilot txhaj tshuaj variance muaj nyob rau hauv ± 0.8% hla 1,200–1,800 bar rail siab viav vias - ib qho kev txhim kho uas txhais tau tias tiag tiag -lub tog raj kheej siab nce tus nqi tswj, ncaj qha cuam tshuam rau crankshaft torsion damping thiab DPF soot loading kwv yees.

cuaj qauv no tsis hloov pauv tau downgrades; txhua tus muaj qhov sib txawvflow kam rau ua grading, Solenoid teb calibration, thiabnozzle protrusion qhov siabhaum rau tej tsev neeg cav:

Qauv	Daim ntawv thov tseem ceeb	Flow Class (ntawm 100 bar)	Key Differentiator
0445120287	Mercedes OM 906 / 926 AW	480-520 ml / 30s	Retarded qhib ramp rau idle stability
0445120288	Mercedes OM 457/471 AW	520-560 ml / 30s	Txhim kho rab koob nqa rau siab - qhov siab ua haujlwm
0986435624	DAF MX-11 / PACCAR	440-480 ml / 30s	Txo sab hauv to rau Euro VI kauj ruam D
A4710700587	FPT Cursor 9 / 13	500-540 ml / 30s	Hardened pilot valve rau biofuels (B20-B100)
A4710700387	IVECO Tector 7	460-500 ml / 30s	Hydraulic ncua sij hawm luv rau hauv nroog nres - pib voj voog
A4710700588	FPT Cursor 13 (siab- tso zis)	540-580 ml / 30s	Txuas ntxiv plunger stroke rau 2,200 bar ncov
A4710780245	SCANIA DC09 / DC13	490-530 ml / 30s	Optimized rau XPI twj tso kua mis siab ripple
A4710701187	Tus txiv neej D0836 / D2066	470-510 ml / 30s	Asymmetric orifice layout rau txo suab nrov
A4710701287	Tus txiv neej D2676 (Euro VI)	510-550 ml / 30s	Dual - caij nplooj ntoos hlav tsav tswj rau kev tiv thaiv cov pa luam yeeb ib ntus

Nco ntsoov:Kev sib xyaw ua qauv thoob plaws ECU software variants yam tsis tau rov ua duaIQ (kev txhaj tshuaj ntau) thiab SOI (pib txhaj tshuaj)daim duab qhia chaw yuav ua rau muaj kev sib txawv ntawm kev sib txawv ntawm kev sib txawv (P0087 / P0088 tsev neeg) hauv 50 teev ua haujlwm, tsis hais qhov haum rau txhua yam.

1. Kev coj tus cwj pwm tshwm sim hauv qab cua sov soak

Ntawm 150℃roj kub, lub 4+4 nozzle lub koob qhia clearance expands ntawm 0.0032 mm ib 50℃increment. Qhov no tsis yog qhov teeb meem tab sis atsim thermal compensator- qhov kev tshem tawm ntau ntxiv tso cai rau ciam teb lubrication thaum lub sij hawm tom qab- cov theem txhaj tshuaj, txo cov kev taw qhia qhov qhab nia. Txawm li cas los xij, nws nce rov qab los ntawm 12 ml / min (txias) mus rau 38 ml / min (kub). Qhov no tsis yog -linear nce yog zoo ib yam nyob rau hauv tag nrho cov cuaj qauv, txhais tau tias koj cov roj cua txias system yuav tsum lis ib tug ntxiv 0.6 L / min rau ib tug injector ntawm sustained tag nrho load - ib tug parameter nquag overlooked nyob rau hauv retrofit ntsuam xyuas.

2. Solenoid Teb Asymmetry

Lub magnetic circuit nyob rau hauv cov injectors siv aceev- lwj ferrite corenrog ob qhov sib txawv rub-hauv qhov hluav taws xob: 48V rau qhib (1.2 ms) thiab 24V rau tuav (3.8 ms). Qhov tseeb qhib ncua nws txawv ntawm tus qauv vim qhov sib txawv ntawm armature stroke:

0445120287 / 0288 / 0986435624→ 0.32 ms stroke → 0.68 ms tag nrho ncua

A-series qauv→ 0.38 ms stroke → 0.74 ms tag nrho ncua

Qhov no 0.06 ms qhov sib txawv, thaum muab faib thoob rau lub tog raj kheej, txhais mus rau 3.2℃crankshaft lub kaum sab xis kis ntawm 2,200 rpm - txaus los tsim lub tog raj kheej ntsuas tau -rau-lub tog raj kheej tsis sib npaug yog tias tsis them nyiaj los ntawm tus kheej lub tog raj kheej CU (YLs_trim)

3. Orifice Hnav Kos Npe

Tsis zoo li ib qho -orifice designs uas nthuav tawm kev nce siab nce ntxiv raws li kev yaig nthuav dav lub qhov, 4+4 kev teeb tsa qhia tau hais tiasbiphasic degradation qauv:

Theem I (0–2,000 teev): Ntws nce 2.1% vim ntug sib npaug ntawm inlet vojvoog.

Theem II (2,000–4,000 teev): Nthuav txo los ntawm 1.8% raws li cov txuas txuas ntawm cov pa roj carbon monoxide ntawm cov orifices uas nyob ib sab - ib qho tshwm sim tshwj xeeb rau pawg nozzle qhov.

Qhov no txhais tau hais tias niaj hnub khiav- kev ntsuas lub rooj zaum ntawm 4,000-teev ib ntus tsis txaus; koj xav tauzaus- teb kev tshuaj ntsuam(FRA) ntawm rab koob acceleration profile txhawm rau txheeb xyuas cov theem hloov thaum ntxov.

Q1: Kuv muaj ib qho kev sib xyaw ua ke - peb los ntawm 0445120287 thiab peb los ntawm A4710700587. Kuv tuaj yeem nruab lawv ua ke yog tias kuv rov kho dua ntawm cov cuab yeej kuaj mob?
Technically yog, tab sis qhov sib txawv qhib ncua sij hawm (0.68 ms vs 0.74 ms) yuav tsum tau ib tug neeg lub tog raj kheej trim hloov tshaj tus qauv ECU adaptation ntau yam. Feem ntau tom qab tuners hla qhov no thiab ua rau txoj kev tsheb ciav hlau tswj kev sib txawv hauv 200 teev ua haujlwm. Peb pom zoo kom sib piv tag nrho rau rau tib pawg qauv tshwj tsis yog tias koj muaj OEM - qib calibration nkag.

Q2: Kuv yuav ua li cas pom qhov txawv ntawm Bosch tiag 4+4 nozzle los ntawm cov khoom cuav?
Cov chav tiag tiag muaj lub laser - kos QR code rau ntawm lub cev sab sauv uas, nyob rau hauv UV teeb, qhia txog lub logo Bosch thib ob. Tsis tas li ntawd, tus tsav tsheb nkag mus yog chamfered ntawm 45℃- cov khoom cuav siv lub ntse 90℃ntug uas ua rau cov cavitation yaig los ntawm 300% hauv thawj 1,000 teev.

Q3: Dab tsi yog qhov kev pab cuam pom zoo rau cov tshuaj txhaj no hauv cov ntawv thov hnyav-?
Bosch qhia txog 400,000 km lossis 8,000 teev rau ntawm - kev siv txoj kev loj, tab sis peb cov ntaub ntawv dav hlau qhia tau tias muaj kev hloov pauv ntawm 300,000 km lossis 6,000 teev txo tag nrho cov nqi ntawm cov tswv cuab los ntawm 11% vim qis dua DPF zaus thiab txhim kho roj kev lag luam (2.3%).

Q4: Kuv puas tuaj yeem khiav cov tshuaj no nrog 100% HVO (hydrotreated zaub roj)?
Yog - lub 4+4 nozzle's hardened pilot valve (tam sim no nyob rau hauv A4710700587 thiab A4710700588 tshwj xeeb) tuav HVO lub qis lubrication yam tsis muaj nrawm hnav. Txawm li cas los xij, rau lwm cov qauv, peb pom zoo kom ntxiv 2% biodiesel los yog lubricity additive los tuav lub caws pliav kab hauv qab 460 μm ib ASTM D6079.

Q5: Kuv lub cav pom qhov tsis muaj zog tsuas yog thaum kub - tus qauv ntsuas twg kuv yuav tsum tau kuaj?
Ntsuas tus nqi rov qab ntawm 80℃roj kub nrog kev tsheb ciav hlau siab ntawm 300 bar. Yog tias rov qab ntws ntau dua 48 ml / min ntawm ib qho ntawm cov qauv no, cov koob qhia kev tshem tawm tau tshaj 0.012 hli - ib qho cim ntawm thermal qaug zog. Qhov no feem ntau tshwm sim ntawm 0445120288 thiab A4710701187 vim lawv cov qauv siv hluav taws xob ntev dua ua haujlwm ntawm qhov nruab nrab kub siab dua.

Q6: Puas yog nws muaj kev nyab xeeb rau ultrasonically ntxuav cov nozzles yam tsis tau disassembling tus tsav valve?
Tsis pom zoo rau 4+4 series. Ultrasonic agitation yuav dislodge tus tsav lub pob retainer caij nplooj ntoos hlav, altering lub pilot txhaj pib. Siv cov tshuaj tua kab mob nkaus xwb (Bosch huv kua 8000 series) nrog qhov siab tshaj 0.5 bar rov qab- siab - thiab tsis pub dhau 15 feeb ntawm qhov kis kom tsis txhob etching lub hnab ntim.

 

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!

 

 

Cim npe nrov: bosch 4+4 nozzle injectors 0445120287=0445120288=0986435624=a4710700587=a4710700387=a4710700588=a4710780245=a4710701187=a4710701287— precision rebuilt rau siab - siab ntau rail systems, Tuam Tshoj bosch 4+4 nozzle injectors 0445120287=0445120288=0986435624=a4710700587=a4710700387=a4710700588=a4710780245=a4710701187=a4710701287— precision rebuilt rau siab- siab ntau rail systems manufacturers, lwm tus neeg, Hoobkas