He aha ka ʻokoʻa ma waena o ka ʻaila 75w90 a me 75w85?
Nā mea
He aha ka viscosity aila?
Hiki i nā ʻaila ʻaila hou ke hoʻopūhoihoi i kekahi manawa a huikau ka mea nona ke kaʻa. Ma waho aʻe o nā hōʻailona hiki ʻole ke hoʻomaopopo ʻia, aia nō ka hoʻokaʻawale ʻana o ka aila i loko o nā ʻano aʻe:
- Minerale.
- Semi-synthetics.
- ʻO nā mea hana synthetic.
Hōʻike ʻia kēlā me kēia wai e nā waiwai a me nā hiʻohiʻona. Eia naʻe, pono e hoʻolohe ka mea nona ka kaʻa ʻaʻole i kēia mau palapala, akā i ke kumu nui no ke koho ʻana i ka aila - viscosity.
ʻO kēia ʻāpana e hiki ai iā ʻoe ke hoʻomaopopo inā hiki ke hoʻohana i ka wai no ka hana ʻana i kahi pae wela. I nā huaʻōlelo ʻē aʻe, ʻo ka viscosity parameter e hiki ai iā ʻoe ke hoʻoholo i ka hiki o ka wai ke mālama i kona wai maoli i ke kaʻina o nā ʻāpana lubricating, no ka mea, ʻike nā mea āpau i ka mānoanoa o ka ʻaila i ka pahu pahu i ka wā e hāʻule ai ka mahana ma waho. Ke alakaʻi nei kēia i ka lubrication hewa a, no laila, pilikia i ka hana o ka pahu pahu.
Papa kuhikuhi SAE
Wahi a ka helu SAE, ua hoʻokaʻawale ʻia ka ʻaila gear i nā ʻāpana aʻe:
- ʻO ka wai no ka hana i ka hoʻoilo (pono ʻia ka leka Pelekane W ma ka māka).
- ʻO ka wai no ka hanaʻana i ke kauwela (ʻaʻohe index i ka māka).
- Ka wai o ke kau a pau. Ma kāna hōʻailona ʻana, aia nā helu ʻelua i ka manawa hoʻokahi, i hoʻokaʻawale ʻia e ka leka W.
Hiki ke hoʻohana ʻia ke ʻano ʻaila hope e nā kaʻa kaʻa i loko o ka makahiki.
He mea pono e hoʻomaopopo i nā koi no kēlā me kēia ʻāpana o ka ʻaila ʻaila i wehewehe ʻia i loko o kahi papa inoa i kapa ʻia ʻo SAE J306. Hōʻike pū ia i ka nui o nā mahana hana i ʻae ʻia o ka wai no ka pahu pahu, ma muli o ka papa.
| Kaulana kūlana | ʻO ka wela liʻiliʻi e hiki i ka viscosity kinetic |
| 70W | -55 |
| 75W | -40 |
| 80W | -26 |
| 85W | -12 |
Nā ʻokoʻa maʻamau
Ke hōʻailona nei i nā aila, ʻo ka helu mua ke ʻano o ka papa viscosity i ka wā e hoʻohana ai i nā huahana i kahi pae wela maikaʻi ʻole. ʻO ka waiwai o ka helu ʻelua ma hope o ka leka W e lawe i ka ʻike e pili ana i ka ʻāpana viscosity no ka hoʻohana ʻana i ka ʻaila i ka pae wela maikaʻi. ʻO ka liʻiliʻi o ka waiwai o ka palena mua a me ka nui o ka lua, ʻoi aku ka maikaʻi o ka wai. Ua wehewehe ʻia kēia e ka helu haʻahaʻa mua e hiki ke hōʻoia i ka neʻe manuahi o nā mīkini i nā mahana sub-zero, a ʻo ka waiwai nui o ka helu ʻelua e hōʻoiaʻiʻo i ka hoʻonui ʻana i ka ikaika o ke kiʻi i hana ʻia.
Ma hope o ka nānā ʻana i nā ʻokoʻa maʻamau i ka mākaʻikaʻi ʻana i ka aila gear, hiki iā mākou ke neʻe i nā hiʻohiʻona kikoʻī.
He aha ka ʻokoʻa ma waena o 75w90 a me 75w85?
Loaʻa i nā wai ʻelua ka waiwai wela hoʻoilo like. Eia nō naʻe, no ka ʻaila 75W85, ʻo ka waiwai o ka hana ma ka pae maikaʻi e piʻi i ka 35 degere, a no ka wai i kaha ʻia ʻo 75W90, ʻo ka nui o ka mahana hana i ʻae ʻia i loko o 45 degere.
He aha ka ʻokoʻa ma waena o 75w90 a me 75w80?
Ua like ke kūlana me kēia mau wai hoʻouna. Aia nā ʻokoʻa ma ka paepae luna no ka hana ʻana o ka wai ma kahi mahana maikaʻi ma waho o ka puka makani.
He aha ka ʻokoʻa ma waena o 75w90 a me 80w90?
Ma kēia ʻano o ka hoʻohālikelike ʻana i nā ʻaila ʻelua, ʻaʻole ia he pae wela maikaʻi i hiki mai i mua, akā he mea maikaʻi ʻole. No laila, hiki ke hoʻohana ʻia kahi wai i kapa ʻia ʻo 75W90 a hiki i -40 degere. A ʻo ka palena ʻae ʻia no ka hana ʻana o ka aila hoʻouna 80W90 he -26 degere.
Me ke koho kūpono o ka wai no ka pahu pahu, hiki iā ʻoe ke maʻalahi i ka hoʻokele ʻana o ke kaʻa ma muli o ka hana ʻoi aku ka mālie o ka ʻōnaehana hoʻouna. Mai ka mea hoʻokele i kēia hihia, e koi ʻia ka liʻiliʻi o ka hoʻoikaika ʻana e hoʻololi i nā kaʻa.
