Kab ntsig 3126 HEUI Injector Koob Valve Lift Kho Shim Cov Khoom Siv - Ntau Yam A (2.40-2.60) & Ntau B (2.20-2.40) - 50-Piece Master Teeb

Tsis zoo li lub solenoid residual air gap-uas tswj kev sib nqus flux-thekoob valve lift shimdictates lub cev mus txawv tebchaws txwv ntawm koob nozzle nyob rau hauv lub cev injector. Qhov kev mus ncig no, xws li ntawm 2.20 hli mus rau 2.60 hli, ncaj qha txhais tau qhov zoo tshaj plaws txaus txaus cheeb tsam ntawm lub sac qhov periphery. Peb kho qhov shim tsis yog ib qho yooj yim spacer, tab sis raws li ib tug"hydraulic stroke tswv xeev."Kev txo qis los ntawm 2.50 mm mus rau 2.30 mm constricts annular orifice area ze li ntawm 11.2%, fundamentally altering the injection rate's "ramp-}up" txoj kab nqes thaum lub sij hawm tseem ceeb. Cov khoom siv no muab cov kev daws teeb meem 0.02 hli granular los kho lub nozzle tus thawj paug coefficient (Cd) yam tsis tau hloov tag nrho lub cev injector.

Peb muab ob chav suites ntxiv los npog tag nrho cov spectrum ntawm 3126 injector hnab tshos:

Suite	Thickness ntau (mm)	Nce ntxiv	Quantity rau Spec	Tag nrho cov khoom	Daim ntawv thov tseem ceeb
A-Teeb (Standard Calibration)	2.40 – 2.60	0.02 (10 specs)	5 pcs ib	50 pcs	OEM lub hauv paus & me ntsis hnav (0.00-0.10 hli dab dej)
B-Teeb (Kev them nyiaj yug hnav)	2.20 – 2.40	0.02 (10 specs)	5 pcs ib	50 pcs	Deep seat recession or injector body re-grinding (>0.10mm dab dej)

Precision Metrology:

Parallelism:Tsawg dua los yog sib npaug li 0.002 mm (Interferometer-tested).

Nto tiav:Ra 0.3 µm los tiv thaiv fretting corrosion tiv thaiv lub nozzle tuav.

Ntug tawg:0.1 x 45℃chamfer kom tshem tawm kev ntxhov siab thaum lub sij hawm 25 MPa txhaj tshuaj pulses.

Khoom siv:Chromium-nickel-molybdenum steel (SAE 8620), rooj plaub-carburized rau HRC 58-62 rau kev tiv thaiv- hnav ntev.

Engine Family:Kab ntsig 3126 (HEUI) - Mechanical Unit Injector (EUI) style.

Injector Base P / N:175-7850, 175-7851, 197-8616, thiab 217-5187 variants.

Cheebtsam qhov chaw:Nruab ncaj qha rau hauv qab nozzle caij nplooj ntoos hlav retainer, zaum ntawm lub xub pwg nyom ntawm lub koob qhia tus pin.

Critical Fit:Lub shim lub puab txoj kab uas hla (ID) yuav tsum tshem lub koob qhia pas nrig nrog ib tug radial clearance ntawm 0.15-0.20 hli. Peb tus ID yog qhov tseeb- honed rau 6.35 hli +0.02/-0.00 kom tsis txhob muaj kev cob qhia.

Ntawm kev khiav hauj lwm kub (roj temp ~ 65 degree), steel shim expands radially los ntawm ~ 0.006 hli. Peb tus qauv tsim suav nrog atsis zoo clearance taperntawm ntug sab nrauv, kom ntseeg tau tias thermal expansion locks lub shim concentrically es warping nws. Qhov no tshem tawm qhov kev poob qis tom qab kev lag luam: shim "cupping" ua rau cov kev taw qhia tsis sib xws thiab cov qauv tshuaj asymmetric.

Kev huv huv:Degrease lub hnab ntim shim nrog hnyav. Txhua qhov khib nyiab nyob hauv qab lub shim nce lub thickness mus txog 0.03 hli, skewing koj teeb.

Kev taw qhia:Lub laser -etched specification (piv txwv li, "2.44") yuav tsum fimnce toj(mus rau lub caij nplooj ntoos hlav retainer). Qhov no ua kom cov cim tsis cuam tshuam nrog lub rooj zaum saum npoo hlau-rau-hlau kov.

Torque Preload:Tighten lub nozzle tuav cov txiv ntoo rau85 N·m ± 3 N·m. Nco ntsoov xyuas lub koob nqa nrog lub dial taw qhia ncej -torque- yog tias lub nqa hloov pauv ntau dua 0.01 hli, lub shim yog undersized rau cov txiv ntseej clamping load thiab yuav tsum tau nce los ntawm 0.02 hli.

Q1: Lub koob nqa shim cuam tshuam li cas rau "Sauter Mean Diameter" (SMD) ntawm cov roj tee?
Kev nqa ntev (Ntau dua lossis sib npaug li 2.50 mm) ua rau lub siab poob qis ntawm lub qhov ncauj qhov nkag, ua kom cov dej ntws tawm los ntawm kwv yees li 5-8 µm. Txawm li cas los xij, dhau 2.60 hli, qhov ntws hloov mus rau hauv lub dav hlau turbulent es tsis yog "txhaj tshuaj," ua tau.nceSMD. Li no, 2.40-2.50 yog qhov "atomization qab zib qhov chaw."

Q2: Kuv puas tuaj yeem sib tov ib qho shim los ntawm A-Teeb thiab B-Set kom ua tiav tus nqi nruab nrab xws li 2.30 hli?
Technically yog (piv txwv li, 1.15+1.15), tab sis xyaumtsis muaj. Stacking ob shims qhia txog micro-cov nyhuv caij nplooj ntoos hlav nyob rau hauv siab- zaus pulsation, ua rau lub nkoj tsis paub tseeb thiab qhov kawg ntawm qhov koob qhia. Ib txwm siv ib qho shim rau lub hom phiaj tuab.

Q3: Dab tsi yog qhov kev sib raug zoo ntawm qhov shim thiab lub cav "dawb pa luam yeeb" tshwm sim ntawm qhov pib txias?
Yog hais tias lub shim yog heev nyias (<2.20 mm), the needle restricts the flow, reducing the injection rate. The ECU compensates by extending the pulse width, but retarded hydraulic delivery causes incomplete combustion, resulting in raw diesel odor and white vapor until the coolant reaches 40°C.

Q4: Kuv yuav tsum kho lub shim thickness yog tias kuv hloov tsuas yog lub taub hau lub taub hau, tsis yog tag nrho cov injector?
Yog lawm, kiag li. Lub nozzle tshiab muaj qhov sib txawv -geometry qhov tob piv rau ib qho hnav. Ib txwm pib nrog a2.46mm ibshim (A-Teeb) thiab ua qhov kev xeem "leak-tawm". Kho los ntawm ± 0.02 hli kom txog rau thaum lub xau- tawm ntim stabilizes nyob rau hauv lub qhov rais 20–30 mL/min.

Q5: Puas yog B-Set qhov me me (2.20-2.40) puas ua rau muaj kev thauj khoom sab ntawm rab koob?
Tsis yog, vim peb shims feature concentric ID / OD kam rau ua<0.005 mm TIR (Total Indicator Reading). Side-loading originates from the guide bore, not the shim. The B-Set merely caps the stroke; it does not alter the needle's lateral axis.

Q6: Kuv yuav ua li cas thiaj paub yog tias kuv yuav tsum dhia los ntawm A-Teeb mus rau B-Teeb thaum daws teeb meem?
Ua qhov ntsuas "lub tog- dab dej" nrog qhov tob micrometer ntawm lub caij nplooj ntoos hlav abutment nto. Yog tias lub dab dej ntau tshaj 0.12 mm, qhov A-Teem qhov tsawg kawg nkaus 2.40 mm tseem siab dhau los ua kom tiav preload. Hloov mus rau B-Teeb thiab xaiv qhov2.38mm ibshim li koj lub hauv paus tshiab.

 

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: Kab ntsig 3126 Heui injector koob valve nqa kev hloov kho shim cov khoom siv - thaj tsam a (2.40-2.60) & ntau b (2.20-2.40) - 50-thooj tus tswv teeb, Tuam Tshoj kab ntsig 3126 heui injector koob valve nqa hloov kho shim cov khoom siv - ntau yam a (2.b) (2.20-2.40) - 50-thooj master set manufacturers, lwm tus neeg, Hoobkas