00U54 / U54 Roj Txhaj Plunger - Kev sib txhuam-Qhov zoo tshaj plaws Clearance Thiab txias-Pib Lubricity Rau Siab-Mileage Common-Rail Pumps

Hauv cov khoom siv -rail roj twj, feem ntau cov kev tsis txaus siab ntawm kev ua haujlwm- qeeb siab tsim, kev tsheb ciav hlau tsis zoo, thiab nce injector drift- tau taug qab tsis yog lub valve tsis ua haujlwm lossis qhov tsis ua haujlwm, tab sis mus rau kev hnav ntawm lub plunger - chim interface. Cov00U54 / U54roj txhaj twj tso kua mis plunger, tsim los ntawm Weifu, hais txog qhov degradation no los ntawm akev sib txhuam- optimized clearance designuas sib npaug hydrodynamic lubrication nrog tsawg sab hauv to. Tsis zoo li siab -kev ua tau zoo sib txawv ntawm qhov tseem ceeb ntawm qhov siab siab, 00U54 yog tsim los rauncua kev pab cuamnyob rau hauv nruab nrab -lub luag hauj lwm thiab hnyav- lub luag hauj lwm tsheb coj mus muag, qhov twg cumulative hnav tshaj 500,000 km yog qhov tseeb metric ntawm kev ntseeg. Nws lub nominal txoj kab uas hla ntawm 9.5 hli thiab stroke ntev ntawm 12.8 hli yog calibrated rau cov twj khiav hauj lwm ntawm 1,200-1,600 bar rail siab, ib tug ntau yam ntawm Euro III rau Euro V xyaw. Lub plunger qhov chaw saum npoo av-tshwj xeeb nwsskewness (Rsk)thiabkurtosis (Rku) mobtsis muaj - yog tswj kom muaj roj zaj duab xis thickness ntawm 0.8-1.2 µm ntawm kev khiav hauj lwm kub, ib tug tsoom fwv uas txo cov asperity contact los ntawm 40% piv rau generic hloov.

Lub 00U54 / U54 plunger undergoes asuperfinished lappingtxheej txheem uas ua tiav qhov nruab nrab roughness (Ra) ntawm 0.025 µm thiab abearing cheeb tsam ratio (Rmr) > 90%ntawm 0.5 µm txiav qhov tob. Qhov saum npoo no yog qhov tseem ceeb rau ciam teb lubrication thaum lub caij txias pib, thaum roj viscosity siab thiab lub plunger ntsib qhov siab tshaj plaws shear stress. TS EN ISO 12156-1 Kev Siv Hluav Taws Xob Hluav Taws Xob Hluav Taws Xob Hluav Taws Xob Hluav Taws Xob Hluav Taws Xob Hluav Taws Xob (CoF)0.054ntawm 1,400 bar thiab 40 degree, poob mus rau 0.048 ntawm 80℃- tus nqi uas yog 18% qis dua uncoated nitrided plungers. Lub thoob, ua los ntawm 100Cr6 bearing steel, nta akhaws cia austenite cov ntsiab lus ntawm 12-15%tom qab kev kho cua sov, uas muab lub zog tsis zoo tiv thaiv micro- tawg los ntawm kev cuam tshuam rov ua dua. Qhov kev sib xyaw ua ke no ua rau ahnav tus nqi ntawm 0.12 µm rau 1,000 teevnyob rau hauv tag nrho -load cycling, uas txhais mus rau ib tug clearance nce los ntawm thawj 3.0 µm mus rau tsuas yog 5.2 µm tom qab 8,000 teev ua hauj lwm - nyob rau hauv qab ntawm lub 6.5 µm pib qhov twg leakage tshaj 10% ntawm tag nrho cov ntws.

Lub 00U54 / U54 plunger teeb ua haujlwm ncaj qha OEM- qib hloov rau Weichai WP6 / WP7, Yuchai YC4G / YC6J, thiab Cummins ISB / ISDe cav nruab nrogBosch CP1thiabDenso HP 0twj. Nws kuj hla - hais txog cov lej OEM00U54thiabU54(tsis muaj qhov trailing xoom), thiab rov qab los - sib xws nrog qee yam khoom siv hauv - kab twj tso kua mis uas tau hloov mus rau kev tswj hwm hluav taws xob. Tsis zoo li 00U502 (10.0 mm txoj kab uas hla) thiab 00U505 (10.5 mm), 00U54 qhov me me hloov chaw haum rau cov cav hauv 5-8 liters, feem ntau pom nyob rau hauv nruab nrab tsheb thauj khoom, tsheb npav hauv nroog, thiab tsheb laij teb ua liaj ua teb. Rau kev cob qhia, cov kauj ruam pov thawj tseem ceeb yog ntsuas lub plunger uas twb muaj lawmcoj ntev- lub 00U54 muaj cov lus qhia ntev ntawm 22.5 hli ± 0.05 hli, uas yuav tsum sib phim lub twj tso kua mis vaj tse qhov tob tob. Lub plungertswj ntug kaumyog 36 degree, uas ncaj qha cuam tshuam rau txoj kab nqes metering thiab yuav tsum tau lees paub nrog lub projector profile yog tias lub twj tso kua mis tau hloov kho yav dhau los.

Performance validation ua raws li covWHSC (World Harmonized Steady-State Cycle)xeem raws tu qauv. Ntawm A100 (rated) qhov chaw ua haujlwm -1,450 rpm twj tso kua mis ceev, 1,500 bar rail siab-tus 00U54 / U54 xa cov roj xa tawm ntawm 215 cc / min nrog rauVolumetric efficiency ntawm 93.2%. Internal to, ntsuas los ntawm ntxiab lub qhov hluav taws xob thiab kaw lub siab lwj, yog3.8% ntawm tag nrho cov ntwsthaum tshiab, nce mus rau 5.1% tom qab 6,000 teev- tus nqi degradation 30% qeeb dua qhov nruab nrab ntawm kev lag luam ntawm 6.8-7.5% nyob rau tib lub sijhawm. Qhov tseem ceeb, cov dej xau tseem nyobkab tawmnrog siab (R²=0.998), txhais tau hais tias lub twj tso kua mis SCV (suction control valve) tuaj yeem them rov qab zoo yam tsis tau nkag mus rau kev tswj hwm tsis ruaj khov. Lub plungerspill port timingyog teem kom pib xa roj ntawm 12℃ua ntej lub cam lub qhov ntswg qhov chaw, uas muab ib tug 2.5℃crank lub kaum sab xis ua ntej ntawm rated ceev, pab offset txhaj ncua los ntawm siab roj compressibility ntawm tsawg ambient kub.

Vim yog lub 00U54 qhov nruj dua clearance (3.0 ± 0.5 µm vs. qhov raug 3.5 µm), installation xav tauceev faj ua ntej -lubricationsiv tib cov roj diesel uas yuav siv tau rau hauv kev ua haujlwm. Soak lub plunger- chim tso rau hauv roj ntawm 20℃rau tsawg kawg 30 feeb kom ntseeg tau tias thermal expansion zoo ua ntej tso. Txoj kev pom zoo ntxig yogntsug, tsis -rotational, siv lub tes tsho qhia los tiv thaiv ntug -loading. Torque lub twj tso kua mis taub hau tuav bolts rau40 N·mhauv ib kab pheeb ces kaum, ua raws li a60℃angular zawm- ob- cov kauj ruam no yog qhov tseem ceeb rau 00U54 vim tias nws lub thoob muaj cov phab ntsa nyias (2.8 hli) piv rau cov plungers loj, ua rau nws muaj kev cuam tshuam rau ovalization. Tom qab sib sau ua ke, ua alow-kev ntsuas ceev cranking(150-200 rpm) nrog cov kab injector disconnected; Lub siab tsim tus nqi yuav tsum yog tsawg kawg 200 bar ib ob ntawm cranking ceev. Tus nqi qis dua qhia tau tias muaj cua nkag los yog qhov chaw zaum tsis raug-re-tseem ceeb rau qis- siab Circuit Court thiab rov kuaj xyuas.

Q1: Dab tsi yog qhov sib txawv ntawm 00U54 thiab 00U502, nrog rau txoj kab uas hla, uas cuam tshuam rau kuv lub twj tso kua mis kev ua haujlwm?
Lub 00U54 muaj lub kaum sab xis tswj sib txawv (36℃vs . 42℃), uas ua rau nws tsis tshua muaj kev sib tw hauv kev ntsuas - muab kev sib zog ua kom muaj zog thiab tsis tshua muaj kev ntxhov siab rau SCV, zoo tagnrho rau cov cav uas siv sijhawm ntau nyob ruaj khov- lub xeev loads (piv txwv li, generators, marine auxiliaries).

Q2: Kuv lub cav muaj cov mileage siab (tshaj 600,000 km). Kuv puas yuav tsum hloov tag nrho lub taub hau twj tso kua mis lossis tsuas yog lub plunger teeb?
Yog hais tias lub thoob pom pom cov qhab nia los yog lub plunger lub chamfer tau ploj lawm, lub thoob yuav hnav dhau qhov rov qab. Txawm li cas los xij, 00U54 teeb tau sib phim rau lub thoob tshiab, yog li koj hloov cov khoom tiav. Lub twj tso kua mis thiab lub camshaft feem ntau zoo yog tias cov menyuam ua si hauv 0.10 hli.

Q3: Kuv puas tuaj yeem siv 00U54 plunger hauv lub twj tso kua mis thawj zaug calibrated rau lub plunger loj dua 10 hli yam tsis tau reprogramming ECU?
Tsis yog- tus nqi ntws mus rau ib qho mob stroke yog kwv yees li 15% qis dua, uas yuav ua rau tsis tu ncua "Fuel Pressure Low" code. Koj yuav tsum rov ua dua -flash daim ntawv qhia roj, uas tsis tshua muaj nqi- zoo. Ib txwm siv lub plunger loj rau koj tus qauv twj tso kua mis.

Q4: Dab tsi yog qhov siab tshaj plaws pub roj particle loj rau 00U54 kom tsis txhob hnav sai?
Lub plunger khiav clearance yog 3 µm; cov khoom siab tshaj 5 µm ua rau peb - lub cev puas. Peb pom zoo kom pom cov roj pom thawj zaug rau 5 µm kiag li (piv txwv li, 98% kev ua haujlwm ntawm 5 µm) thiab cov lim thib ob mus rau 2 µm kom ua tiav qhov kev tshaj tawm 8,000-teev kev pabcuam lub neej.

Q5: Kuv yuav txhais li cas cov tsos mob "plunger sticking" - kev sib tshuam rail siab poob, tshwj xeeb tshaj yog tom qab kub kaw?
This is often caused by fuel coking on the plunger's upper land. The 00U54's DLC coating reduces coking adhesion, but if it occurs, it indicates either excessive fuel temperature (>110 degree) los yog degraded roj. Tshawb xyuas cov roj txias thiab cov injector rov qab ntws.

Q6: Puas yog 00U54 sib haum nrog kev ua haujlwm siab - qhov siab siab (siab dua 3,000 m) qhov twg ambient siab qis dua?
Yog lawm, tab sis cov huab cua qis qis txo qis lub cav thauj khoom, txhais tau tias lub twj tso kua mis ua haujlwm ntawm tus nqi qis dua. Lub plunger cov dej xau tau nce siab dua li feem pua, yog li koj tuaj yeem pom me ntsis poob hauv kev tsheb ciav hlau siab. Kho SCV offset ntawm cov cuab yeej kuaj xyuas kom them nyiaj.