Injini ye-M54B25 2.5L evela kwaBMW - ulwazi olubaluleke kakhulu endaweni eyodwa
Okuqukethwe
Izimoto ezihlome ngenjini ye-M54B25 zisakhona emigwaqweni yasePoland. Lena injini ephumelelayo, elinganiselwe njengeyunithi yokonga ehlinzeka ngokusebenza kahle. Sethula ulwazi olubaluleke kakhulu mayelana nezici zobuchwepheshe, izixazululo zokuklama namazinga okuhluleka kwemikhiqizo ye-BMW.
Injini ye-M54B25 - idatha yobuchwepheshe
Model M54B25 - 2.5-litre uphethiloli iyunithi - ncamashi 2494 cm3. Yakhiwe ngomugqa wesithupha. Injini enama-stroke amane ngokwemvelo imele umndeni wakwa-M54. Ikhiqizwe kusukela ngo-2000 kuya ku-2006 embonini yaseBavaria BMW eMunich.
Ibhulokhi inobubanzi obuyi-84,0 mm kanye ne-stroke engu-75,00 mm. Isilinganiso sokucindezelwa okuzisholo singu-10,5:1, amandla aphezulu eyunithi angama-189 hp. ku-6000 rpm, i-torque ephakeme - 246 Nm.
Kuyafaneleka futhi ukusho ukuthi zisho ukuthini ngempela izimpawu zamayunithi ngamanye. I-M54 ibhekisela emndenini wenjini, uphawu B lwenguqulo kaphethiloli wenjini, kanye no-25 emandleni ayo afanayo.
Yimiphi imishini eyafakwa i-M54B25?
Iyunithi yasetshenziswa kusukela ngo-2000 kuya ku-2006. Injini ye-BMW yafakwa ezimotweni ezinjengalezi:
- BMW Z3 2.5i E36/7 (2000–2002);
- BMW 325i, 325xi, 325Ci (E46) (2000–2006 gg.);
- I-BMW 325ti (E46/5) (2000–2004 gg.);
- I-BMW 525i (E39) (2000–2004);
- BMW 525i, 525xi (E60/E61) (2003–2005 gg.);
- I-BMW X3 2.5i (E83) (2003–2006);
- I-BMW Z4 2.5i (E85) (2002-2005).
Idizayini yeDrayivu
Injini ye-M54B25 yayisekelwe ku-aluminium alloy cast cylinder block kanye nama-cast iron cylinder liners. Ikhanda lesilinda, nalo elenziwe nge-aluminium, linama-camshaft aphindwe kabili e-DOHC aqhutshwa ngochungechunge kanye nama-valve amane isilinda ngasinye, enani lama-valve angama-24.
Abaklami beyunithi yamandla baphinde banquma ukuyihlomisa ngesistimu yokulawula ye-Siemens MS 43 kanye ne-Vanos dual variable variable time time for the intake and exhaust camshafts. Igama eliphelele lalolu hlelo yi-BMW variable valve timing system. Konke lokhu kuhambisana ne-electronic throttle engeyona eyemishini kanye nokuphindaphinda kabili kokuthatha kwe-DISA.
Endabeni yenjini ye-M54 B25, isistimu yokuthungela engasabalalisi enamakhoyili okuthungela nayo yasetshenziswa. Ngamunye wabo uklanyelwe ngokwehlukana ku-cylinder ngayinye ne-thermostat, ukusebenza kwayo kulawulwa yi-electronics.
Block izakhiwo
Le elementi inamasilinda, ngayinye evezwe kusipholisa esijikelezayo. I-cast iron crankshaft elinganisiwe izungeza kumabheringi amakhulu ashintshwayo anezindlu ezihlukene. Kufanele futhi kuqashelwe ukuthi i-M54B25 inama-bearings ayisikhombisa amakhulu.
Okunye okugqamile ukuthi izinti zokuxhuma zensimbi ezenziwe ngomgunyathi zisebenzisa ama-bearings ahlukanisekayo ashintshwayo ohlangothini lwe-crankshaft, kanye nezihlahla eziqinile lapho kukhona iphinikhodi ye-piston. Ama-pistons ngokwawo ayidizayini enezindandatho ezintathu enezindandatho ezimbili zokucindezela eziphezulu kanye nendandatho eyodwa ephansi esula amafutha. Izikhonkwane ze-piston, ngakolunye uhlangothi, zibamba isikhundla sazo ngokusebenzisa ama-circlips.
ikhava yesilinda
Ngekhanda le-cylinder le-M54B25, impahla yokukhiqiza iyanquma. I-aluminium alloy inikeza amapharamitha amahle wokupholisa kahle. Ngaphezu kwalokho, idalwe ngesisekelo somklamo wezwe lonke ohlinzeka ngamandla nomnotho. Kungukubonga kuye ukuthi umoya wokungenisa ungena ekamelweni ukusuka kolunye uhlangothi bese uphuma kolunye.
Izinyathelo ezikhethekile zokuklama nazo ziye zaholela ekwehleni komsindo wenjini. Lokhu kusebenza ekususweni kwama-valve, okulawulwa yiziphakamisi zama-hydraulic ezizishintshayo. Iphinde iqede isidingo sokulungiswa kwama-valve avamile.
Ukusebenza kweDrayivu - yini okufanele uyibheke?
Enjinini ye-BMW M54B25, izinkinga ezivame kakhulu ipompo yamanzi engalungile kanye ne-thermostat engalungile. Abasebenzisi baphinde bakhombe ivalve ye-DISA eyonakele kanye nezimpawu ze-VANOS eziphukile. Isembozo se-valve kanye nesembozo sephampu kawoyela nakho kuvame ukuhluleka.
Ingabe injini ye-M54B25 ikufanele ukunconywa?
Ngesikhathi sokuqhakaza kwayo, i-M54B25 ithole ukubuyekezwa okuhle kakhulu. Uhlale ekleliswe endaweni yokuqala ohlwini lwezinjini ezihamba phambili emhlabeni wephephabhuku i-Ward. Ngokulungiswa okuvamile kanye nokusabela okufika ngesikhathi ezingxenyeni ezivame ukwehluleka, injini ye-M54B25 izosebenza ngaphandle kokwehluleka izinkulungwane zamakhilomitha.
