V8 cav crankshafts yog kwv yees muab faib ua ob hom, ib tug yog tus ntoo khaub lig crankshaft thiab lwm yam yog ib tug ca crankshaft. Qhov sib txawv loj tshaj plaws yog lub kaum sab xis ntawm txhua ob lub crankshafts yog 90 degrees es tsis txhob 180 degrees. Lub dav hlau crankshaft V8 cav muaj ib tug yooj yim qauv thiab me inertia, uas yog conducive rau siab revolutions thiab cav teb, nrog super vibration ...

Muaj ob lub ntsiab lus ntawm lub cav tshuab kev co: thawj-txiav kev vibration thiab thib ob-txiav kev vibration

E.g. peb lub tog raj kheej tshuab

Nyob rau txhua lub sijhawm thaum lub crankshaft tig, tsis tsuas yog tus naj npawb ntawm nce thiab nqis pistons ib txwm sib txawv, cov lus qhia txav ntawm lub tog raj kheej 1 thiab lub tog raj kheej 3 yog ib txwm rov qab, ua rau lub cav tsis tsuas yog vibrate nce thiab nqis, Nws kuj tseem muaj. oscillates rov qab. Yog tias koj xav siv nws rau ntawm lub tsheb loj, koj yuav tsum tau muab nws nrog lub zog sib npaug, txwv tsis pub koj tuaj yeem siv nws los tsav cov khoom ua si hluav taws xob. Raws li cov lus hais mus: peb lub tog raj kheej ua rau lub ntiaj teb xav tsis thoob.

Tab sis lub tshuab plaub-lub tog raj kheej

Nws zoo nkaus li tias ob lub tog raj kheej txav mus thaum ob lub tog raj kheej txav mus. Qhov no puas yog lub cav zoo meej?

Tshem tawm ib nrab ntawm plaub-lub tog raj kheej lub cav los txheeb xyuas cais, nws tsis yooj yim rau pom tias vim qhov teeb tsa geometric ntawm lub crank txuas pas nrig, qhov ceev ntawm lub piston nce siab yog ib txwm nrawm dua li qhov ceev ntawm lub piston downward, ua rau lub piston nce. lub cav kom vibrate nce thiab nqis txhua 180 degrees ntawm lub crankshaft. .

daws? Qhov sib npaug ncej uas tig ob zaug sai li lub crankshaft. Nws tuaj yeem hais tau tias tom qab Mitsubishi thawj zaug siv ob lub ntsej muag sib npaug rau cov khoom tsim tawm 4-ntu cav hauv xyoo 1970, hom cav no yeej muaj lub neej yav tom ntej.

Txawm li cas los xij, thaum ntxov plaub-lub tog raj kheej cav crankshaft tsis txawm muaj qhov hnyav. Ntxiv nrog rau cov txheej txheem machining teeb meem nyob rau lub sijhawm ntawd, lub cav ceev tau qis dua li ntawm lub tshuab hluav taws xob tam sim no.

Yog li xyoo 1910, Cadillac thiab Ford cov neeg tsim qauv xav daws qhov teeb meem kev vibration los ntawm 90-degree lub kaum ntse ntse thiab counterweight. (Tab sis hauv txoj kev xav, lub dav hlau axis tsis xav tau qhov kev tsim no)

Lub sab valve V8 thiab qhov yooj yim ca crankshaft lub sijhawm ntawd

Qhov zoo ntawm 90 ° suav nrog lub kaum sab xis cav yog tias qhov sib npaug ntawm qhov hnyav ntawm lub crankshaft tuaj yeem siv los cuam tshuam qhov kev vibration torque tsim los ntawm kev txav ntawm lub piston hauv lwm kab ntawm lub tog raj kheej. Txoj cai no siv tau rau 90-degree V-hom cav nrog ob peb lub tog raj kheej.

Piv txwv li, thaum lub tog raj kheej sab sauv nce mus, lub counterweight txav mus rau hauv qab. Thaum rotating counterclockwise, qhov ceev ntawm counterweight taw tes rau sab xis tom qab tig thaum 6 teev, tab sis lub piston txav ntawm sab xis mus rau sab laug counteracts lub sij hawm no.

Tab sis nyob rau hauv lub xyoo 1920, lub cav ceev tau nce, thiab qhov teeb meem ntawm kev vibration thib ob tau dhau los ua pom tseeb dua, yog li feem ntau ntawm cov tshuab tsim V8 tau pib nruab nrog tus ntoo khaub lig crankshaft.

Qhov sib txawv loj tshaj plaws ntawm tus ntoo khaub lig crankshaft (sab saum toj) thiab lub dav hlau crankshaft (hauv qab) yog tias lub kaum sab xis ntawm txhua ob lub crankshaft yog 90 degrees tsis yog 180 degrees. Lub dav hlau crankshaft V8 yuav muaj tib qhov teeb meem kev vibration thib ob raws li lub cav ncaj nraim 4, thiab lub sijhawm 90-degree ntawm ob kab ntawm lub tog raj kheej kuj tseem yuav ua rau 180-degree kev co yuav tsum superimposed. Tus ntoo khaub lig crankshaft yog vim qhov sib txawv ntawm ob pawg ntawm crankshafts sib cais los ntawm 180 degrees yog 90 degrees tsis yog 180 degrees. Qhov zaus ntawm qhov kev vibration thib ob tsuas yog ib nrab ntawm lub dav hlau crankshaft, thiab qhov amplitude tau txo qis heev.

Nco ntsoov qhov zoo ntawm lub cav 90-degree? Qhov teeb meem yog daws tau tom qab ntxiv lub counterweight

Tab sis ntawm no los qhov teeb meem. Txij li txhua kab ntawm lub tog raj kheej muaj ob lub pistons mus txog qhov chaw tuag saum toj kawg nkaus ntawm 90-degree lub sijhawm, txawm li cas los xij, txawm li cas los xij, txhua kab ntawm lub tog raj kheej yuav muaj ob lub ignitions ntawm 90-degree intervals, ua rau muaj kev cuam tshuam loj heev (uas yog, General V8 Cav zoo ib yam li ua rau lub suab nrov ntawm cov tshuab ua liaj ua teb).

Yog li ntawd, txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau qis qis, lub dav dav dav dav V8 yuav tsim H-hom lossis X-hom sib npaug cov yeeb nkab nyob rau hauv nruab nrab ntawm cov pa tawm, thiab siv qhov sib txawv ntawm qhov sib txawv ntawm ob lub tso pa kom txo tau qhov cuam tshuam ntawm tso pa tawm cuam tshuam.

Qee qhov kev ua haujlwm tsom V8s siv tus qauv tsim ntau dua. Piv txwv li, cov yeeb nkab tso tawm ntawm Ford GT txuas rau lub tog raj kheej hluav taws xob uas nyob ib sab mus rau lub tso pa tawm ntawm sab nraud. Dab tsi ntxiv (lub frenzied BMW) tsis yig kom tso pa tawm. Ntsuas mus rau sab hauv ntawm V kom siv cov khoom siv nyuaj ntxiv

Yog li ntawd, tus ntoo khaub lig crankshaft tsis yog ib qho zoo rau cov tshuab ua haujlwm siab. Txawm hais tias qhov kev vibration me me, qhov hnyav hnyav ua rau lub cev tsis muaj zog ntawm lub cav loj dhau, uas tsis yog qhov tsim nyog rau cov lus teb ntawm lub cav rhiab thiab kev ua tiav ntawm kev kub ceev, tsis hais txog qhov hnyav. Tsis tas li ntawd, kev cuam tshuam cov pa tawm kuj yog ib qho kev txwv loj ntawm kev ua haujlwm ntawm cov cav. Yog li European high-performance V8 engine tseem hais kom siv lub ca crankshaft.

Lub dav hlau crankshaft V8 yeej welds ob ncaj 4s ua ke. Txij li thaum cov pistons khiav nce thiab nqis ib txwm nyob hauv khub, yuav tsis muaj teeb meem kev vibration, tab sis ob lub vibration thib ob yuav tsum xav kom muaj qhov hnyav dua. Yuav nrog. Qhov sib ntxiv ntawm qhov sib npaug ntawm qhov sib npaug nce qhov loj thiab lub sijhawm ntawm inertia, yog li cov kev ua haujlwm no siv cov pistons luv luv thiab cov qauv muaj zog los kho cov tsos mob thiab tsis yog lub hauv paus ua rau txo qis cov kev vibrations.

Kev tua hluav taws ntawm lub dav hlau crankshaft V8 yog qhov yooj yim heev, thiab tsis muaj teeb meem uas tus ntoo khaub lig crankshaft V8 thiab lub tog raj kheej tso tawm yog ignited sequentially. Lub tog raj kheej uas ua haujlwm ib txwm yog sab laug-txoj cai-sab laug-txoj cai-sab laug-txoj cai-sab laug-txoj cai..., tsis yog sab laug-txoj cai-sab laug-sab laug-sab laug-txoj cai-txoj cai zoo li tus ntoo khaub lig, yog li ntawd muaj. Tsis muaj kab Rau cov teeb meem huab cua cuam tshuam, koj tuaj yeem siv cov pa sib npaug ntawm qhov ntev ntawm cov pa manifolds kom muaj zog ntawm kev hloov pauv siab.

Hla ncej

Qhov zoo: tsis tshua muaj kev vibration thiab ua haujlwm du

Disadvantages: hnyav hnyav, loj inertia, tso pa cuam tshuam

Dav hlau axis

Qhov zoo: cov qauv yooj yim, qis inertia, zoo rau kev kub ceev thiab lub cav teb

Disadvantages: zoo vibration