Lakiō kōmi a me ka helu octane o ka ʻaila
Nā mea
Pākuʻi lākiō - kū'ē kū'ē
ʻO ka lakio kino o ka nui o ka pahu i ka manawa o ka piston i loko o ke kikowaena make i ka nui hana o ke keʻena hoʻopau i loko e hōʻike ʻia e ka lākiō kaomi (CL). Hōʻike ʻia ka mea hōʻailona e ka nui dimensionless. No nā kaʻa kaʻa he 8-12, no ka hoʻokele diesel he 14-18. ʻO ka hoʻonui ʻana i ka pākuʻi e hoʻonui i ka mana, ʻoi aku ka maikaʻi o ka mīkini, a hoʻemi pū i ka hoʻohana wahie. Eia nō naʻe, hoʻonui nā waiwai CV kiʻekiʻe i ka hopena o ka hoʻopau ʻana iā ia iho o ka hui ʻana i ke kiʻekiʻe. No kēia kumu, pono e loaʻa i ka ʻaila me kahi kiʻekiʻe coolant index ke kūpaʻa kiʻekiʻe - helu octane (OC).
ʻO ka helu Octane - kūkeke kūʻē
Hoʻopili ʻia ka puhi ʻana o ka ʻaila me kahi kīkē maʻamau i hoʻokumu ʻia e nā nalu pahū i loko o ka cylinder. ʻO kahi hopena like ma muli o ka haʻahaʻa haʻahaʻa o ka wahie wai i ka hoʻopau ʻana iā ia iho i ka manawa o ke kaomi. Hōʻike ʻia ke kūpaʻa kīkē e ka helu octane, a ua koho ʻia kahi hui ʻana o n-heptane a me isooctane ma ke ʻano he kuhikuhi. He waiwai octane ma ka māhele o 70-98, e like me ka pakeneka o ka isooctane i loko o ka hui. No ka hoʻonui ʻana i kēia ʻāpana, hoʻokomo ʻia nā mea hoʻohui octane-correcting kūikawā i loko o ka hui ʻana - esters, alcohols, a me nā ethylates metala kaumaha. Aia ka pilina ma waena o ka ratio ho'opi'i a me ka brand of gasoline:
- I ka hihia o CV ma lalo o 10, hoʻohana ʻia ʻo AI-92.
- Ma SZ 10–12, koi ʻia ʻo AI-95.
- Inā he 12–14 ka CV - AI-98.
- Me ka CV like me 14, pono ʻoe iā AI-98.
No ka mīkini carbureted maʻamau, ʻo ka SOL ma kahi o 11,1. I kēia hihia, ʻo ka OC maikaʻi loa ʻo 95. Eia naʻe, hoʻohana ʻia ka methanol i kekahi mau ʻano heihei o nā kaʻa. ʻO ka SD i kēia hiʻohiʻona hiki i 15, a ʻokoʻa ka OC mai 109 a 140.
Ka hoʻohana ʻana i ka ʻaila octane haʻahaʻa
Hōʻike ka manual kaʻa i ke ʻano o ka mīkini a me ka wahie i ʻōlelo ʻia. ʻO ka hoʻohana ʻana i ka hui pū ʻana me kahi OC haʻahaʻa e alakaʻi i ka pau ʻana o ka wahie a i kekahi manawa ka luku ʻana i nā mea hana o ka kaʻa.
He mea nui hoʻi e hoʻomaopopo i ka ʻōnaehana hoʻolako wahie i hoʻohana ʻia. No ke ʻano mechanical (carburetor), pono e hoʻokō i nā koi no OC a me SJ. I ka hihia o kahi ʻōnaehana ʻakomi a i ʻole ka ʻōnaehana injection, hoʻoponopono ʻia ka hui ʻana o ka ea-wahie i ka uila. Hoʻopiha a hoʻopau ʻia ka hui ʻaila i nā koina OCH i koi ʻia, a ke holo maʻamau nei ka ʻenekini.
wahie octane kiʻekiʻe
ʻO AI-92 a me AI-95 ka mea i hoʻohana nui ʻia. Inā hoʻopiha ʻoe i ka pahu, no ka laʻana, me ka 95th ma kahi o ka 92nd i ʻōlelo ʻia, ʻaʻohe pōʻino nui. E hoʻonui wale ka mana i loko o 2-3%. Inā hoʻopiha ʻoe i ke kaʻa me 92 ma kahi o 95 a i ʻole 98, a laila e hoʻonui ka hoʻohana ʻana i ka wahie, a emi ka mana. ʻO nā kaʻa o kēia wā me ka hoʻokele uila e hoʻokele i ka hāʻawi ʻana i kahi hui ʻana a me ka oxygen a no laila e pale ai i ka mīkini mai nā hopena maikaʻi ʻole.
Papa o ka lakiona hoemi a me ka helu octane
ʻO ke kuʻekuʻe ʻana o ka wahie automotive he pilina pololei me ka lākiō kaomi, i hōʻike ʻia ma ka papa ma lalo.
| LOA | SJ |
| 72 | 6,8-7,0 |
| 76 | 7,2-7,5 |
| 80 | 8,0-9,0 |
| 91 | 9,0 |
| 92 | 9,1-9,2 |
| 93 | 9,3 |
| 95 | 10,5-12 |
| 98 | 12-14 |
| 100 | Nui aʻe ma mua o 14 |
hopena
Hōʻike ʻia nā ʻaila kaʻa e ʻelua mau hiʻohiʻona nui - ke kūpaʻa kūkeke a me ka ratio compression. ʻO ke kiʻekiʻe o ka SO, ʻoi aku ka nui o ka OC. ʻO ka hoʻohana ʻana i ka wahie me ka waiwai haʻahaʻa a i ʻole ke kiʻekiʻe o ke kūʻē ʻana i nā kaʻa o kēia wā, ʻaʻole ia e hōʻeha i ka ʻenekini, akā e hoʻopilikia i ka mana a me ka hoʻohana ʻana i ka wahie.
