V8 engine crankshafts ua roughly maheleia i elua ano, hoʻokahi he kea crankshaft a me kekahi he palahalaha crankshaft. ʻO ka ʻokoʻa nui loa, ʻo ke kihi ma waena o kēlā me kēia crankshaft ʻelua he 90 degere ma mua o 180 degere. ʻO ka mokulele crankshaft V8 engine he ʻano maʻalahi a me ka inertia liʻiliʻi, kahi kūpono i nā kipi kiʻekiʻe a me ka pane ʻana o ka mīkini, me ka super vibration...

ʻElua mau manaʻo o ka ʻenekini mechanical vibration: ʻo ka vibration mua a me ka vibration ʻelua

E.g. mīkini pahu ʻekolu

I kēlā me kēia manawa i ka wā e huli ai ka crankshaft, ʻaʻole ʻokoʻa wale ka helu o nā piston i luna a i lalo, ʻo nā kuhikuhi o ka neʻe ʻana o nā pistons o ka cylinder 1 a me ka cylinder 3 e kūʻē mau ana, ʻaʻole e haʻalulu wale ka ʻenekini i luna a i lalo. oscillates i hope a i waho. Inā makemake ʻoe e hoʻohana iā ia ma kahi kaʻa i hana nui ʻia, pono ʻoe e hoʻolako iā ia me kahi pahu kaulike, inā ʻaʻole hiki iā ʻoe ke hoʻohana iā ia e hoʻokele i kahi pāʻani uila. E like me ka ʻōlelo ʻana: ua hoʻopūhoihoi ka ʻekolu-cylinder i ka honua.

Akā ʻo ka mīkini ʻehā-cylinder maʻamau

Me he mea lā e neʻe ana ʻelua puʻupuʻu i luna a ʻelua mau puʻupuʻu e neʻe i lalo. He ʻenekini kūpono kēia?

ʻO ka lawe ʻana i ka hapalua o ka ʻenekini ʻehā-cylinder no ka hoʻokaʻawale ʻana, ʻaʻole paʻakikī ka ʻike ʻana ma muli o ka hoʻonohonoho geometric o ke koʻokoʻo hoʻohui crank, ʻoi aku ka wikiwiki o ka piston i luna ma mua o ka wikiwiki o ka piston i lalo, ke kumu o ka piston. ʻenekini e haʻalulu i luna a i lalo i kēlā me kēia 180 degere o ka crankshaft. .

Hoʻoholo? He lāʻau kaulike e hoʻololi ʻelua i ka wikiwiki e like me ka crankshaft. Hiki ke ʻōlelo ʻia, ma hope o ka hoʻohana mua ʻana o Mitsubishi i ka pahu kaulike pālua i ka mīkini 4-segment i hana nui ʻia i nā makahiki 1970, ua loaʻa maoli kēia ʻano ʻenekini i ka wā e hiki mai ana.

Eia naʻe, ʻaʻole i loaʻa i ka crankshaft engine crankshaft mua kahi counterweight. Ma waho aʻe o nā pilikia kaʻina hana i kēlā manawa, ʻoi aku ka haʻahaʻa o ka mīkini ma mua o ka mīkini diesel o kēia manawa.

No laila, i nā makahiki 1910, makemake nā mea hoʻolālā Cadillac a me Ford e hoʻoponopono i ka pilikia haʻalulu ma o kahi kihi 90-degere a me ke kaulike. (Akā ma ke kumumanaʻo, ʻaʻole pono ka axis plane i kēia hoʻolālā)

ʻO ka valve ʻaoʻao V8 a me ka crankshaft maʻalahi i kēlā manawa

ʻO ka pōmaikaʻi o ka ʻenekini kihi 90 ° ʻo ia ka hiki ke hoʻohana ʻia ke kaupaona kaulike ma ka crankshaft e hoʻopau i ka torque vibration i hana ʻia e ka neʻe ʻana o ka piston ma kahi lālani o nā cylinders. Pili kēia kumumanaʻo i ka ʻenekini V-type 90-degere me kekahi mau pahu pahu.

No ka laʻana, ke neʻe ka puʻukū luna i luna, e neʻe ka paona kaulike i lalo. ʻOiai e hoʻololi ana i ka ʻaoʻao ʻākau, ʻo ka wikiwiki o ka counterweight e kuhikuhi ana i ka ʻaoʻao ʻākau ma hope o ka huli ʻana i ka hola 6, akā ʻo ka piston e neʻe ana mai ka ʻākau a i ka hema ke kūʻē i kēia manawa.

Akā i ka makahiki 1920, ua hoʻonui ka wikiwiki o ka mīkini, a ua ʻike ʻia ka pilikia o ka haʻalulu lua, no laila ua hoʻomaka ka hapa nui o nā mīkini V8 i hana ʻia me ka crankshaft keʻa.

ʻO ka ʻokoʻa nui loa ma waena o ka crankshaft keʻa (luna) a me ka crankshaft mokulele (lalo) ʻo ia ka huina ma waena o kēlā me kēia crankshaft ʻelua he 90 degere ma kahi o 180 degere. Loaʻa i ka mokulele crankshaft V8 ka pilikia haʻalulu lua e like me ka ʻenekini 4 pololei, a ʻo ka manawa 90-degere ma waena o nā lālani ʻelua o nā cylinders e hoʻokau pū ʻia ka haʻalulu 180-degere i luna. ʻO ka crankshaft keʻa no ka mea ʻo ka ʻokoʻa ma waena o nā pūʻulu ʻelua o nā crankshafts i hoʻokaʻawale ʻia e 180 degere he 90 degere ma kahi o 180 degere. ʻO ke alapine o ka haʻalulu lua he hapalua wale nō o ka crankshaft plane, a ua hoʻemi nui ʻia ka amplitude.

E hoʻomanaʻo i nā pono o ka mīkini 90-degree? Hoʻoholo ʻia ka pilikia ma hope o ka hoʻohui ʻana i ka counterweight

Akā eia ka pilikia. No ka mea, ʻelua pistons i kēlā me kēia lālani o nā pahu e hōʻea ana i ke kikowaena make ma luna o ke kikowaena 90-degere, ʻaʻole pili i ke ʻano o ka hoʻonohonoho ʻana i ke kaʻina hoʻāla, e loaʻa i kēlā me kēia lālani o nā cylinders ʻelua mau ʻāʻī ma nā manawa 90-degere, e hopena i ke keakea nui (ʻo ia hoʻi, ua like nā ʻenekini V8 maʻamau me ke kumu o ka walaʻau ʻana mai nā mīkini mahiʻai).

No laila, i mea e hoʻonui ai i ka hiki ke scavenging ma nā haʻahaʻa haʻahaʻa, e hoʻolālā ka V8 kīwila maʻamau i kahi paipu kaulike H-type a i ʻole X-type ma waena o ka pau, a hoʻohana i ka ʻokoʻa puʻe ma waena o nā ʻāpana ʻelua e hoʻemi i ka mana o. keakea hoopau.

Ke hoʻohana nei kekahi mau V8 i ka hana i kahi hoʻolālā i ʻoi aku ka wili. No ka laʻana, hoʻopili ka paipu hoʻopau o Ford GT i ka pahu hoʻoheheʻe e pili ana i ka manifold exhaust ma kēlā ʻaoʻao. ʻO ka mea hou aku (ʻo BMW frenzied) ʻaʻole kānalua e hoʻopau i ka pau. Ana ʻia i loko o ka V no ka hoʻohana ʻana i nā manifold exhaust paʻakikī

No laila ʻaʻole maikaʻi ka crankshaft keʻa no nā ʻenekini hana kiʻekiʻe. ʻOiai ka liʻiliʻi o ka haʻalulu, ʻo ka counterweight kaumaha ke kumu o ka inertia kūloko o ka mīkini e nui loa, ʻaʻole kūpono i ka pane ʻana o ka mīkini paʻakikī a me ka ʻike ʻana i ka wikiwiki kiʻekiʻe, ʻaʻole e haʻi i ka hoʻēmi kaumaha. Eia kekahi, he kapu nui ka hoʻopau ʻana i nā mīkini hana. No laila ke koi mau nei ka ʻenekini V8 hana kiʻekiʻe o ʻEulopa i ka hoʻohana ʻana i kahi crankshaft palahalaha.

Hoʻopili maoli ka crankshaft V8 i ʻelua mau 4 pololei. No ka mea ʻo nā pistons e holo ana i luna a i lalo he mau pālua, ʻaʻohe pilikia haʻalulu mua, akā pono ka haʻalulu lua lua e koi i kahi kumu kaulike ʻoi aku ke kaumaha. E hana me. ʻO ka hoʻohui ʻana o ke kumu kaulike e hoʻonui i ka nui a me ka manawa o ka inertia, no laila hoʻohana kēia mau mīkini hana i nā pistons pōkole a me nā hale ikaika e mālama i nā hōʻailona a ʻaʻole ke kumu kumu e hōʻemi ai i kēia mau haʻalulu.

He mea maʻalahi loa ke kaʻina puhi o ka mokulele crankshaft V8, a ʻaʻohe pilikia o ka hoʻā ʻana o ka crankshaft V8 a me nā cylinders exhaust sequentially. ʻO nā cylinders e hana mau ana ka hema-'ākau-hema-'ākau-hema-'ākau-hema-'ākau ..., ma kahi o ka hema-'ākau-hema-hema-'ākau-hema-'ākau-'ākau e like me ke koʻi keʻa, no laila ʻaʻohe lālani No nā pilikia pili i ka ea, hiki iā ʻoe ke hoʻohana i nā manifold exhaust lōʻihi like maʻamau e hoʻonui i ka mana i nā kipi kiʻekiʻe.

ʻau kea

Pōmaikaʻi: haʻahaʻa haʻahaʻa haʻahaʻa a maʻalahi ka hana

Nā pōʻino: ke kaumaha kaumaha, ka inertia nui, ka hoʻopau ʻana

axis plane

Pōmaikaʻi: ka hana maʻalahi, haʻahaʻa inertia, maikaʻi no ka wikiwiki kiʻekiʻe a me ka pane ʻana o ka mīkini

Nā pōʻino: haʻalulu nui