Bosch EUP 7.030 Valve Plunger - Fretting Wear Resistance & Micro-Kev Tiv Thaiv Kev Nyuaj Siab Rau 0414750/755/799 Series Unit Pumps

 

Hauv Bosch Electronic Unit Pump (EUP) system, lub valve plunger raug rau ntau lab ntawm kev ua haujlwm dhau los ntawm nws lub neej kev pabcuam. Nyob rau hauv txhua lub voj voog, lub plunger txav ob peb millimeters hauv nws qhov bore, tab sis nws tsis yog tag nrho cov hlab ntsha uas ua rau muaj kev puas tsuaj ntau tshaj -nws yog qhovmicro- zogntawm qhov kawg ntawm kev mus ncig. Thaum lub plunger zaum tag nrho (solenoid de- zog) lossis siab nqa (solenoid energised), microscopic vibrations los ntawm lub cav thiab roj siab pulsations ua rau lub plunger oscillate nyob rau hauv lub clearance ntawm nws haum. Qhov no oscillation, feem ntau tsawg dua 0.005 hli hauv amplitude, yog hu uantxhov siab. Sij hawm dhau mus, fretting hnav cov txheej tiv thaiv DLC, tsim cov khib nyiab zoo, thiab tuaj yeem ua raukev nyuaj siab corrosion qaug zogntawm kev tswj ntug hauv paus. Bosch EUP 7.030 yog lub valve plunger tshwj xeeb tsim rau Bosch 0414750, 0414755, thiab 0414799 series twj tso kua mis, nrog rau qhov tshwj xeeb tsim tshwj xeeb:fretting hnav tsis kam los ntawm qhov chaw engineering mus kom zeuas ua ke nrog nano- textured DLC txheej nrog kev tswj qhov seem compressive stressive profile hauv substrate. Lub nano-textured nto txo ​​qhov coefficient ntawm kev sib txhuam thaum lub sij hawm micro- txav ntawm 0.08 mus rau 0.05, thaum cov seem compressive kev nyuaj siab (ua tiav los ntawm kev sib sib zog nqus tshwj xeeb-cryogenic kho) tiv thaiv kev nthuav tawm ntawm micro- tawg uas pib los ntawm kev puas tsuaj. Thaum lub valve plunger yam tsis muaj cov yam ntxwv no tau ua haujlwm ntev ntev - mais kev ua haujlwm, fretting hnav maj mam nce lub plunger- mus rau - tho qhov kev tshem tawm los ntawm 0.002-0.003 mm rau 100,000 km, uas ua rau kom cov pa tawm thiab lub sijhawm ya raws. Phau ntawv qhia no redefines lub valve plunger li aqaug zog-kev tswj xyuas, qhov twg nto kev ntxhib los mos thiab residual kev nyuaj siab engineering yog ib qho tseem ceeb raws li qhov tseeb qhov ntev.

 

Lub EUP 7.030 valve plunger yog ib qho kev hloov pauv ncaj qha rau cov hauv qab no Bosch EUP series, tshwj xeeb tsim los rau siab -mileage daim ntawv thov qhov ntev - lub sij hawm hnav tsis kam yog qhov tseem ceeb:

Bosch 0414750- 12-valve EUP hauv MAN D20 / D26, DAF MX cav (Euro 3/4)

Bosch 0414755- Txhim kho Euro 4/5 version rau Volvo D13 thiab Renault DXi

Bosch 0414799- High-flow industrial variant rau gensets thiab marine

Cov rooj sib tham EUP no muaj nyob hauv:

MAN TGA, TGS, TGX- D20, D26 cav

DAF XF, CF- MX-11, MX-13 cav

Volvo FH, FM- D13 series (Euro 4/5)

Renault hwm, Magnum– DXi 11, 13

Cov ntawv thov kev lag luam- Liebherr, MTU, Cummins QSK siv Bosch EUP

EUP 7.030 yog txheeb xyuas los ntawm nwsnano{0}} textured nto tiav-zoo li me ntsis matte nrog cov qauv zoo, zoo ib yam lis-thiab atshwj xeeb serial tooj prefix(feem ntau yog 7.030-xxx lossis 2 418 455 9xx). Lub plunger kuj nta alaser -engraved batch codeuas qhia txog lub voj voog kho cryogenic. Ib txwm txheeb xyuas tias qhov hloov pauv plunger nqa lub npe 7.030; Lwm cov EUP plungers tsis muaj fretting -resistant nto engineering.

 

Parameter	Specification
Bosch Reference	EUP 7.030 (2 418 455 9xx series - paub meej nrog lub twj tso kua mis)
Hom Lub Npe	Valve plunger nrog fretting -resistant nano- textured nto
Khoom siv hauv paus	Cov cuab yeej kub ceev (ASP 2053) - HRC 62-66
Nto Txheej	Nano{0}}textured DLC (3-5 µm) nrog CrN adhesion txheej
Nto Roughness (Ra)	0.02 µm – optimized rau micro-lub suab lubrication tuav
Residual Compressive Stress	-350 txog -450 MPa (ze -surface) - induced los ntawm kev sib sib zog nqus-cryogenic kho
Fretting Hnav Rate	Tsawg dua los yog sib npaug li 0.002 mm rau 1,000,000 cycles (vs . 0.008 mm rau txheej txheem txheej)
Coefficient of Friction (micro-txoj kev)	0.05 (textured DLC) vs . 0.08 (tus qauv DLC)
Tswj Ntug Av Dav	0.75mm ib
Mating Fit Clearance	0.004-0.008 hli (nrog valve lub cev bore)
Pom zoo hloov	800,000–1,000,000 km (ntawm txoj kev loj) / 8,000–10,000 teev (kev lag luam)
Txoj kev tshuaj xyuas	Surface kev ntxhib los mos; clearance ntsuas; kev tsom xam khib nyiab

 

EUP 7.030 uas tau hloov pauv nrog qhov tsis yog -textured plunger (lossis tau dhau nws qhov kev txwv tsis pub hnav) qhia nws tus kheej los ntawm cov tsos mob sib txawv:

Progressive lub sij hawm drift- Lub sijhawm txhaj tshuaj maj mam hloov mus rau lub sijhawm raws li kev tshem tawm nce ntxiv, yuav tsum tau rov ua dua ECU hloov pauv.

Nce roj rov qab ntws- maj mam nce rov qab ntws ntawm 5-10% tshaj 100,000 km, tshwm sim los ntawm kev nthuav dav dav.

Dub residue hauv roj lim- cov khoom dub zoo (fretting khib nyiab) tau daig hauv cov roj lim, pom zoo li cov av dub.

Solenoid tam sim no nce- Raws li qhov clearance widens, lub plunger txoj kev sib hloov hloov, ua kom lub solenoid tam sim no kos los ntawm 5-8%.

Kev ntsuam xyuas kev cob qhia: nrog rau EUP tshem tawm, ntsuas lub plunger - mus rau - tho qhov kev tshem tawm siv lub ntsuas ntsuas telescopic thiab micrometer. Lub plunger tshiab muaj qhov tshem tawm ntawm 0.004-0.008 hli; qhov clearance tshaj 0.012 hli qhia tau hais tias tseem ceeb fretting hnav thiab warrants hloov.

 

Fretting yog qhov zoo-paub hom tsis ua haujlwm nyob rau hauv ntau-rail injector valve tsheb ciav hlau, qhov twg tswj valve plungers thiab koob tau raug rau qhov zoo sib xws micro- txav txav. Cov txheej txheem saum npoo av thiab qhov seem ntawm kev ntxhov siab siv nyob rau hauv EUP 7.030 yog ncaj qha hloov mus rau cov khoom sib xws -rail injector Cheebtsam, uas nce siv cov thev naus laus zis zoo sib xws los txuas ntxiv kev pab cuam lub neej. Nkag siab txog 7.030's fretting-resistance design muab cov kws tshaj lij nrog cov kev xav tseem ceeb ntawm kev siv tshuaj niaj hnub no.

 

Q1: Dab tsi nano- textured nto zoo li piv rau tus qauv DLC?
Cov txheej txheem DLC txheej txheem muaj qhov du, iav -zoo li tiav. Lub nano-textured DLC muaj ib tug me ntsis matte tsos nrog ib tug nplua, zoo li grain-zoo li ib tug zoo heev sandblasted tiav, tab sis nyob rau hauv lub microscopic theem. Yog tias qhov chaw glossy, nws tsis yog 7.030.

Q2: Kuv puas tuaj yeem siv EUP 7.030 hauv lub twj tso kua mis uas yav dhau los siv 7.020 lossis 7.025?
Yog-lub 7.030 yog qhov sib npaug thiab sib haum nrog txhua lub twj tso kua mis 0414750/755/799. Nws suav nrog cov yam ntxwv zoo ib yam li 7.020 (khiav- quab yuam nyiaj) thiab 7.025 (qhib damping), ua rau nws muaj kev hloov kho tshiab uas sib xyaw ua ke tag nrho cov qauv kev txhim kho yav dhau los nrog fretting tsis kam.

Q3: Ua li cas sib sib zog nqus -cryogenic kev kho mob txhim kho fretting resistance?
Sib sib zog nqus- kev kho mob cryogenic (txias mus rau -196℃tom qab los ntawm qeeb tempering) hloov cov khaws cia austenite mus rau martensite thiab induces ib tug uniform residual compressive kev nyuaj siab teb nyob rau hauv ze - txheej txheej. Qhov kev ntxhov siab no tawm tsam qhov kev ntxhov siab tensile tsim thaum lub sij hawm fretting, tiv thaiv micro- pib tawg thiab nthuav tawm.

Q4: Kuv puas tuaj yeem pom qhov tsis pom kev hnav yam tsis muaj lub tshuab tsom iav?
Thaum ntxov fretting hnav tsis pom ntawm qhov muag liab qab. Txawm li cas los xij, yog tias koj khiav ib daim ntaub dawb huv hla lub plunger nto thiab pom ib qho tsaus grey residue, nws qhia tau hais tias fretting khib nyiab raug tsim. Qhov kev ntsuam xyuas meej dua yog ntsuas lub plunger - mus rau - tho qhov tshem tawm.

Q5: Puas yuav EUP 7.030 txhim kho roj kev lag luam?
Indirectly-los ntawm kev tswj hwm qhov kev tshem tawm thawj zaug ntev dua, lub plunger qhov dej ntws qis qis dua, khaws cia lub twj tso kua mis ua haujlwm tau zoo. Qhov no tiv thaiv ECU los ntawm kev them nyiaj rau kev poob qis los ntawm kev txhaj tshuaj ntev ntev, uas tuaj yeem txhim kho roj kev lag luam nce mus txog 1% dhau ntawm lub twj tso kua mis lub neej ntev kev pab cuam.

Q6: Vim li cas EUP 7.030 kim dua lwm EUP plungers?
Tus nqi ntxiv qhia txog kev ua haujlwm saum npoo av siab tshaj-nano-texturing, sib sib zog nqus-cryogenic kho, thiab CrN adhesion txheej- uas tsis muaj nyob rau hauv cov qauv plungers. Lub neej ntev kev pab cuam thiab txo downtime ua pov thawj tus nqi them rau siab -mileage applications.

 

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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