700932 High-Pressure Roj Pump - Tsav Torque Stability & Mechanical-Hydraulic Coupling Rau Tsawg-Vibration Ua Haujlwm

Lub twj tso kua mis siab yog tsav ncaj qha los ntawm lub cav lub camshaft lossis iav tsheb ciav hlau, siv li ntawm 3-6 kW ntawm tag nrho cov load -kwv yees li 1-2% ntawm lub cav tag nrho cov zis. Tab sis qhov kev thauj khoom no tsis tas li: raws li txhua lub twj tso kua mis plunger compresses roj, lub zog tsav torque spikes, tsim kom muaj lub zog ntawm lub zog uas rov qab los ntawm lub tsheb ciav hlau, ua rau lub sij hawm saws lossis iav hnav thiab, nyob rau hauv qhov xwm txheej hnyav, ua rau lub suab "sib tham" nyob rau pem hauv ntej ntawm lub cav. Cov700932 high-pressure roj twj tso kua misyog engineered nrog atorque-smoothed cam profilethiab ahydraulic damping chamberuas txo qhov siab tshaj plaws-rau-ncej tsav torque variation los ntawm 40%, txo cov neeg kho tshuab kev ntxhov siab xa mus rau lub cav lub sijhawm. Kab lus no tshuaj xyuas 700932's mechanical-hydraulic coupling, nws daim ntawv thov hauv Bosch CP1/CP3 systems, thiab cov kev teeb tsa uas ua kom tsis muaj kev vibration ua haujlwm tsawg-tsis rov ua cov tshuaj txhaj tshuaj tshwj xeeb lossis cov twj tso kua mis.

Nyob rau hauv tus qauv 3-piston radial twj tso kua mis, txhua piston compresses roj ib zaug ib kiv puag ncig. Lub compression stroke yog nrawm, tsim kom muaj lub ntsej muag torque. Lub 700932 siv ibasymmetric cam profilenrog:

A maj mam sawvnyob rau hauv lub compression flank, kis tau tus load tshaj ib tug ntev crank kaum.

A poob siabntawm qhov rov qab flank, uas tsis cuam tshuam rau tsav torque tab sis txo lub sijhawm nyob nruab nrab ntawm pulses.

📊 Torque Pulse Shape (1,800 rpm, 1,800 bar):
Standard cam: Ntxoov ntxoo (34 N·m ncov), nqaim dav
700932: Dav dav ncov (38 N·m ncov), dav hauv paus → txo qhov ncov-rau-peak variation

Lub ncov dav dav txhais tau hais tias qhov kev thov torque tau muab faib rau lub sijhawm ntev dua, txo qhov kev thauj khoom tam sim ntawm lub tsheb ciav hlau. Lub hydraulic damping chamber, nyob rau ntawm lub twj tso kua mis qhov hluav taws xob, absorbs residual siab pulses ua ntej lawv mus txog lub tsheb ciav hlau, ntxiv smoothing lub system tag nrho cov dynamic teb.

Lub twj tso kua mis tsis ua haujlwm hauv kev sib cais. Nws torque pulsations cuam tshuam nrog lub cav torsional dynamics, tshwj xeeb tshaj yog nyob rau hauv tej yam resonant ceev (feem ntau 1,200-1,400 rpm). Yog hais tias lub twj tso kua mis lub torque ripple coincides nrog lub ntuj zaus ntawm lub sij hawm system, qhov tshwm sim ntawm vibration yuav ua rau kom hnav ntawm cov saw saw thiab tensioner.

700932 uatxo torque rippleHloov cov resonant coupling taw tes rau ntau zaus (tso dua 2,200 rpm), qhov twg lub sij hawm lub damping yog lawm ntau dua. Hauv kev sim dav hlau, qhov no tau ua rau muaj kev cuam tshuam25-30% ntxivntawm lub sij hawm saw lub neej ntawm Mercedes-Actros tsheb thauj khoom, ib qho kev tsis ua hauj lwm taw tes rau yav dhau los Euro 5 tsheb.

Tom qab kev teeb tsa, lub twj tso kua mis lub zog torque-smoothing tuaj yeem raug txheeb xyuas los ntawm kev ntsuas qhov ntsuasiav tsheb ciav hlau kev conrog ib tug accelerometer tso rau ntawm lub sij hawm npog:

Baseline (lub twj tso kua mis tshiab):Kev vibration amplitude Tsawg dua los yog sib npaug li 1.2 g (acceleration) ntawm 1,800 rpm.

Hnav los yog txheem twj tso kua mis:Qhov hnyav 1.8-2.4 g.

Installation Torque:

Pump mounting bolts:45‑50 N·m(qhuav).

High-pressure kab txuas:70‑75 N·mrau M14 cones.

Tsav spline / gearing: ua raws li lub cav tsim cov txheej txheem (feem ntau lubricated nrog sib dhos paste).

Lub 700932's torque-smoothed ua haujlwm yuav tsum tau xav txog hauvlub sij hawm chain tensioner extensionntsuas ntawm txhua qhov kev pabcuam. Lub twj tso kua mis nrog lub siab torque ripple yuav ua rau lub tensioner txuas mus sai. Rau lub cav 700932-nruab nrab:

100,000 km:Tensioner extension Tsawg dua los yog sib npaug li 3 hli.

300,000 km:Tsawg dua los yog sib npaug li 8 hli.

500,000 km:Tsawg dua los yog sib npaug li 15 mm (tseem nyob rau hauv lub tensioner txoj kev mus).

Yog hais tias lub tensioner ncua ntev (piv txwv li, 10 hli ntawm 200,000 km), lub torque ripple tej zaum yuav siab tshaj qhov xav tau -tejzaum nws yog vim lub twj tso kua mis coj los yog misaligned tsav coupling.

Q1: Puas yog lub 700932 tuaj yeem ntsia tau raws li kev hloov pauv ncaj qha rau tus qauv CP3 twj tso kua mis?
Yog, yog hais tias lub mounting flange, tsav interface, thiab high-pressure qhov hluav taws xob chaw nres nkoj yog zoo tib yam. Lub 700932 yog dimensionally ib lub twj tso kua mis CP3, tab sis nws cov cam profile thiab hydraulic damping txawv. Lub ECU tsis tas yuav tsum tau rov ntsuas dua rau lub twj tso kua mis- lub roj ntsuas valve (SCV) them nyiaj rau txhua qhov sib txawv. Txawm li cas los xij, peb pom zoo kom kuaj xyuas SCV calibration tom qab kev teeb tsa.

Q2: Puas yog lub torque-smoothed cam cuam tshuam rau lub twj tso kua mis ntws los yog lub peev xwm siab?
Tsis yog- lub cam profile hloov qhovsij hawmntawm compression, tsis yog tag nrho cov kev hloov chaw. Tus nqi ntws (68 L / h ntawm 1,800 rpm) thiab lub peev xwm siab (2,000 bar) zoo ib yam rau tus qauv CP3. Lub smoother profile tiag tiag txo cov kev ntxhov siab sab hauv, uas tuaj yeem txuas ntxiv lub twj tso kua mis lub neej.

Q3: Lub 700932 muaj hydraulic damping chamber. Dab tsi yog qhov yuav tsum tau saib xyuas rau lub chamber no?
Lub damping chamber yog ib qho kab noj hniav uas tsis muaj qhov txav mus los - nws tsuas muaj ib lub ntim roj uas ua raws li lub cushion. Nws yuav tsum tsis muaj kev saib xyuas. Txawm li cas los xij, yog tias lub twj tso kua mis disassembled, xyuas kom meej tias lub damping chamber tau ntim nrog roj ua ntej reinstallation los tiv thaiv thawj zaug cavitation.

Q4: Kuv puas tuaj yeem siv 700932 nrog biodiesel blends (B20 / B30)?
Biodiesel qhov viscosity siab dua tuaj yeem cuam tshuam rau lub damping chamber qhov ua tau zoo me ntsis (cov kua dej damping yog roj). Rau B20, torque ripple yuav nce los ntawm 2-3 N·m, uas tseem nyob hauv qhov kev txwv. Rau B30, peb pom zoo kom saib xyuas lub sij hawm saw tensioner ntau zaus -qhov viscosity ntau dua tuaj yeem ua rau lub twj tso kua mis tag nrho cov torque xav tau.

Q5: Lub twj tso kua mis muaj qhov tsav spline. Nws puas xav tau ib lub lubrication tshwj xeeb thaum lub sij hawm installation?
Yog lawm- tus tsav spline yuav tsum tau lubricated nrog amolybdenum-disulphide (MoS₂) muab tshuaj txhuamtiv thaiv kev hnav khaub ncaws. Tsis txhob siv lub hom phiaj tseem ceeb roj, vim nws tsis muab lub siab-siab ciam teb lubrication xav tau rau kev sib cuag spline. Lub torque ntawm tus tsav coupling yuav tsum tau siv nrog lub cav ntawm TDC los xyuas kom meej phasing raug.

Q6: Kuv yuav ua li cas thiaj paub yog tias lub twj tso kua mis torque-smoothed feature tseem ua haujlwm tom qab 300,000 km?
Qhov kev txheeb xyuas yooj yim tshaj plaws yog ntsuas qhov ntsuaslub sij hawm chain tensioner extensionraws li tau piav saum toj no. Yog tias qhov txuas ntxiv nyob rau hauv qhov kev xav tau, lub twj tso kua mis tseem ua haujlwm kom raug. Lwm qhov kev kuaj xyuas yog mloog rau "sib tham" nyob rau pem hauv ntej ntawm lub cav thaum lub caij txias (thaum cov roj ntau viscous). Lub twj tso kua mis nrog lub cam hnav lossis lub chamber puas tsuaj yuav ua rau cov hlau sib txawv ntawm 1,200-1,400 rpm.

 

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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