BMW M52TUB20, M52TUB25, M52TUB28 engines
Lub M52 series yog BMW roj av cav nrog rau hauv-kab teeb tsa ntawm 6 lub tog raj kheej thiab ob lub camshafts (DOHC).
Lawv tau tsim los ntawm 1994 txog 2000, tab sis xyoo 1998 muaj "kev hloov kho tshiab" (kev hloov kho thev naus laus zis), uas muaj ob lub VANOS system tau qhia rau cov qauv uas twb muaj lawm, uas tswj lub sijhawm ntawm cov pa tawm (dual gas distribution system). Nyob rau hauv cov npe ntawm qhov zoo tshaj plaws 10 Ward xyaw rau xyoo 1997, 1998,1999, 2000 thiab 52, MXNUMX tau tshwm sim tsis tu ncua thiab tsis tso lawv txoj haujlwm.
Lub cav ntawm M52 series tau txais ib qho txhuas lub tog raj kheej thaiv, tsis zoo li M50, uas yog ua los ntawm cam khwb cia hlau. Hauv North America, cov tsheb tseem raug muag nrog cov cav no hauv cov cam khwb cia hlau. Lub siab ceev txwv yog 6000 rpm, thiab qhov loj tshaj plaws ntim yog 2.8 litres.
Hais txog 1998 kev hloov kho tshiab, muaj plaub qhov kev txhim kho tseem ceeb:
- Vanos valve lub sij hawm system, uas yuav tau tham nyob rau hauv kom meej ntxiv tom qab;
- Electronic throttle tswj;
- Muab ob npaug rau qhov sib txawv Geometry Intake Valve (DISA);
- Redesigned lub tog raj kheej liner.
M52 TUB 20
Qhov no yog ib qho kev hloov kho M52B20, uas, vim qhov kev txhim kho tau txais, zoo li ob qho tib si, muaj ntau dua traction ntawm qis revs (nruab nrab torque yog 700 rpm qis). Lub tog raj kheej bore yog 80mm, piston stroke yog 66mm, thiab compression yog 11: 1. Volume 1991 cu. cm, zog 150 hp ntawm 5900 rpm - qhov txuas ntxiv ntawm tiam neeg hauv cov yam ntxwv no pom tau. Txawm li cas los xij, lub zog torque yog 190 N * m, zoo li M52V20, tab sis ntawm 3500 rpm.
Siv rau hauv tsheb:
- BMW E36/7 Z3 2.0i
- 1998-2001 BMW 320i / 320Ci (E46 cev)
- 1998-2001 BMW 520i (E39 cev)
M52 TUB 25
Lub piston stroke yog 75 hli, lub tog raj kheej txoj kab uas hla yog 84 hli. Tus thawj B25 2.5-liter qauv tshaj nws cov predecessor nyob rau hauv lub hwj chim - 168 hp. ntawm 5500 rpm. Cov kev hloov kho, nrog cov yam ntxwv zoo sib xws, ua rau tib yam 245 N * m ntawm 3500 rpm, thaum B25 mus txog lawv ntawm 4500 rpm.
Siv rau hauv tsheb:
- 1998-2000 E46323i, 323ci, 325i
- 1998-2000 E39523 XNUMXi
- 1998-2000 E36/7Z3 2.3i
M52 TUB 28
Lub cav tshem tawm yog 2.8 litres, lub piston stroke yog 84 hli, lub tog raj kheej txoj kab uas hla yog 84 hli, lub crankshaft muaj ib tug nce stroke piv rau lub B25. Compression ratio 10.2, lub zog 198 hp ntawm 5500 rpm, torque - 280 N * m / 3500 rpm.
Cov teeb meem thiab qhov tsis zoo ntawm tus qauv ICE no feem ntau zoo ib yam li M52B25. Nyob rau sab saum toj ntawm daim ntawv, nws muaj overheating, uas feem ntau ua rau malfunctions ntawm lub gas faib mechanism. Kev daws rau overheating feem ntau yog ntxuav lub tshuab hluav taws xob, xyuas lub twj tso kua mis, ntsuas kub, lub tshuab hluav taws xob. Qhov teeb meem thib ob yog kev siv roj ntau dhau ntawm cov qauv. Nyob rau hauv BMW, qhov no yog, nyob rau hauv lub hauv paus ntsiab lus, ib qho teeb meem tshwm sim, uas yog txuam nrog tsis hnav-resistant piston rings. Thaum tsis muaj kev loj hlob ntawm cov phab ntsa ntawm lub tog raj kheej, cov rings tuaj yeem hloov tau yooj yim thiab cov roj yuav tsis tawm ntau tshaj li qhov tau hais tseg. Hydraulic lifters ntawm cov cav no "zoo li" rau coke, uas ua rau misfiring.
Siv rau hauv tsheb:
- 1995-1999 E36328 328i, XNUMXis
- 1995-1998 E39528 XNUMXi
- 1995-1998 E38728 728i, XNUMXiL
- 1997-1998 E36/7Z3 2.8
Lub kaw lus VANOS yog qhov nkag siab zoo rau kev ua haujlwm ntawm lub cav thiab thaum muaj kev hloov pauv tsis ruaj khov, kev ua haujlwm tsis sib xws feem ntau lossis poob hauv lub zog, nws hnav ntau heev. Txhawm rau daws nws, koj yuav tsum muaj cov khoom siv kho qhov system.
Tsis ntseeg crankshaft thiab camshaft txoj hauj lwm sensors feem ntau ua rau lub cav tsis pib, txawm tias outwardly txhua yam zoo. Lub ntsuas kub zoo li yuav xau, thiab feem ntau cov peev txheej qis dua li ntawm M50.
Ntawm qhov zoo, nws tuaj yeem raug sau tseg tias peb lub cav no tsis yog tshwj xeeb rau qhov zoo ntawm cov roj av. Tuning lawv feem ntau tsis pom zoo, nrog rau kev yuav khoom sib pauv, vim lawv twb laus lawm. Txawm li cas los xij, rau cov neeg uas pheej nyob hauv lawv txoj kev ntshaw, muaj ib txoj hauv kev uas muaj pov thawj - rau nruab cov khoom siv manifold M50B25, camshafts los ntawm S52B32 thiab nti tuning. Xws li kev kho yuav nce lub zog mus rau qhov siab tshaj plaws ntawm 250 hp. Lwm qhov kev xaiv pom tseeb yog tho txawv txog 3 litres, nrog rau kev yuav khoom ntawm M54B30 crankshaft thiab txiav lub piston los ntawm 1.6 hli.
Txhim kho lub turbine ntawm ib qho ntawm cov lus piav qhia yog ib txoj hauv kev txaus kom muaj zog. Piv txwv li, ib qho M52B28 nrog lub Garrett turbine thiab cov txheej txheem zoo yuav tsim yuav luag 400 hp. nrog ib pawg piston Tshuag.
Txoj kev kho rau M52V25 yog qhov txawv me ntsis. Ntawm no nws yog ib qho tsim nyog yuav tau yuav, ntxiv rau cov khoom noj khoom haus los ntawm "kwv tij" M50V25, kuj tseem muaj lub crankshaft nrog M52V28 txuas rods, nrog rau firmware. Nws yog qhov zoo dua rau nruab camshafts thiab lub tso pa tawm tom qab S62 - tsis muaj lawv, nws yuav tsis budge thaum kho. Yog li, nrog lub ntim ntawm 2 litres, koj yuav tau txais ntau tshaj 200 hp.
Txhawm rau nce lub zog ntawm lub cav me tshaj plaws 2-liter, koj yuav xav tau ib lub bore mus rau qhov siab tshaj plaws ntawm 2.6 litres lossis lub turbine. Ntxub thiab tu, nws yuav muaj peev xwm muab tawm 200 hp. Turbocharged nrog kev pab los ntawm cov khoom siv tshwj xeeb turbo yuav thaum kawg tuaj yeem nyem tawm 250 hp. ntawm 2 litres ntawm kev ua haujlwm ntim. Cov khoom siv Garrett tuaj yeem hloov tau los ntawm Lysholm, uas tseem yuav muab lub zog nce ntxiv hauv tib qhov kev txwv.
| Lub cav | HP / rpm | N * m/r/min | Ntau lawm xyoo |
|---|---|---|---|
| M52 TUB 20 | 150/5900 | 190/3600 | 1998-2000 |
| M52 TUB 25 | 170/5500 | 245/3500 | 1998-2000 |
| M52 TUB 28 | 200/5500 | 280/3500 | 1998-2000 |
