BMW N42B20 injini - ulwazi kanye nomsebenzi

Injini ye-N42B20 ibilokhu ikhiqizwa kusukela ngo-2001 futhi ukusatshalaliswa kwaphela ngo-2004. Umgomo oyinhloko wokwethula lolu phiko kwakuwukushintsha izinguqulo ezindala zezinjini, njenge-M43B18, M43TU ne-M44B19. Sethula ulwazi olubaluleke kakhulu mayelana nebhayisikili kwa-BMW.

Injini ye-N42B20 - idatha yobuchwepheshe

Ukukhiqizwa kweyunithi kagesi kwenziwa yimboni ye-BMW Plant Hams Hall, eyaba khona kusukela ngo-2001 kuya ku-2004. Injini isebenzisa amasilinda amane anamapiston amane lilinye ohlelweni lwe-DOHC. Ukususwa kwenjini ngqo kwakungu-1995 cc.

Iyunithi yomugqa ibibonakala ngobubanzi besilinda ngasinye esifinyelela ku-84 mm kanye ne-piston stroke engu-90 mm. Isilinganiso sokucindezela 10:1, amandla angu-143 hp ngo 200 Nm. Ukuhleleka kokusebenza kwenjini ye-N42B20: 1-3-4-2.

Ukuze kusetshenziswe kahle injini, kwakudingeka amafutha angu-5W-30 no-5W-40. Ngokulandelayo, umthamo wethangi le-substance wawungu-4,25 l. Kwakudingeka ushintshwe njalo ngemva kuka-10 12. km noma izinyanga ezingu-XNUMX.

I-BMW unit yafakwa kuziphi izimoto?

Injini ye-N42B20 ifakwe kumamodeli aziwa kakhulu yibo bonke abathanda izimoto. Sikhuluma ngezimoto iBMW E46 318i, 318Ci kanye ne318 Ti. Iyunithi elangazelela ngokwemvelo ithole ukubuyekezwa okuhle futhi isesendleleni nanamuhla.

Ukwehliswa kwesisindo kanye nokwenza kahle kwetorque - lokhu kwafinyelelwa kanjani?

Le yunithi isebenzisa ibhulokhi yenjini ye-aluminium. Kulokhu kwenezelwa amahlahla ensimbi. Lesi esinye isisombululo sesistimu evame ukusetshenziswa eyenziwe ngokuphelele nge-cast iron. Le nhlanganisela iholele esisindweni esilula uma iqhathaniswa nezinjini ezindala ze-BMW inline-four.

Ukulungiswa kwe-torque kufinyelelwa ngokusebenzisa i-geometry elawulwa nge-elekthronikhi ehlukahlukene. Isistimu yayibizwa nge-DISA futhi yathuthukisa nemingcele yamandla ngesivinini esiphansi nesiphezulu. Okunye okwengezwe kulokhu i-Bosch DME ME9.2 ye-fuel injection system.

Izinqumo zokuklama eziyisisekelo

Ngaphakathi kwe-cylinder block kune-crankshaft entsha ngokuphelele ene-stroke engu-90 mm, ama-pistons kanye nezinduku zokuxhuma. Injini ye-N42B20 iphinde yaba nama-balance shafts omklamo ofanayo nenjini ye-M43TU.

Ikhanda le-DOHC elinamavalvu angu-16, nalo elenziwe ngale nto, lihlala phezu kwebhulokhi ye-aluminium. Kwakuwukugxuma kwangempela kwezobuchwepheshe, njengoba amamodeli angaphambili ezithuthuthu asebenzisa amakhanda e-SOHC angama-valve angu-8 kuphela. 

I-N42B20 iphinde ihlanganise i-Valvetronic variable valve lift kanye neketango lesikhathi. Futhi, abaklami banquma ukufaka ama-camshafts amabili ngesistimu ye-valve eguquguqukayo - uhlelo lwe-Double Vanos. 

Ukusebenza Kweyunithi YeDrayivu - Izinkinga Ezivamile Kakhulu

Enye yezinkinga ezivame kakhulu zesithuthuthu ukushisa ngokweqile. Ngokuvamile lokhu kwakungenxa yokungcoliswa kwe-radiator. Isinyathelo esingcono kakhulu sokuvimbela kwakuwukuhlanza njalo. I-thermostat eyonakele nayo ingaba imbangela - lapha ikhambi liwukushintshwa okuvamile njalo nge-100 XNUMX. km. 

Izimpawu ze-valve stem nazo zingaphansi kokugqoka, ziyayeka ukusebenza futhi, ngenxa yalokho, ukusetshenziswa kukawoyela wenjini kuyanda. Kukhona nezinkinga ezihlobene nesistimu yokupholisa. Injini ye-N42B20 nayo ingaba nomsindo - isisombululo sokuphazamiseka okuhambisana nomsindo ukufaka esikhundleni se-timing chain tensioner. Lokhu kufanele kwenziwe ku-100 km. 

Kudingeka futhi ukuqapha isimo samakhoyili okuthungela e-BREMI. Angahluleka uma kushintsha ama-spark plug. Kulesi simo, shintsha amakhoyili ufake amakhoyili okuthungela e-EPA. Amafutha enjini atuswa umenzi wemoto nawo abalulekile ekusebenzeni kahle kwesithuthuthu. Ukwehluleka ukwenza lokho kuzodinga ukulungiswa kabusha kokuhlanganisa nokushintshwa kohlelo lwe-Vanos. 

Injini ye-N42 B20 - ingabe kufanelekile ukukhetha?

IMotor 2.0 yakwaBMW iyunithi eyimpumelelo. Iyonga futhi ukulungiswa ngakunye kubiza kancane - imakethe inokutholakala okuphezulu kwezingxenye ezisele, futhi omakhenikha bavamise ukwazi kahle izici zenjini. Naphezu kwalokhu, iyunithi idinga ukuhlolwa njalo nokunakekelwa ngokucophelela.

Idivayisi ibuye ilungele ukushunwa kwe-chip. Ngemva kokuthenga izakhi ezifanele, njengokungena komoya obandayo, i-Cat Back exhaust system kanye nokulungisa injini, ukuguqulwa kukuvumela ukuthi ukhuphule amandla eyunithi ibe ngu-160 hp. Ngenxa yalesi sizathu, injini ye-N42B20 ingaba isisombululo esihle.