ʻO ka mea hana a me ke kumu o ka hana o ka multiport fuel injection MPI

Ua hoʻololi ʻia nā ʻōnaehana hoʻoheheʻe wahie pressurized mai nā mea mīkini maʻalahi a hiki i nā ʻōnaehana hoʻokele uila e hoʻopaʻa paʻa i ka wahie i kēlā me kēia cylinder engine. Hoʻohana ʻia ka abbreviation MPI (Multi Point Injection) e hōʻike i ke kumu o ka hāʻawi ʻana i ka ʻaila e nā injectors electromagnetic i ka intake manifold, kokoke loa i waho o ka valve intake. I kēia manawa, ʻo ia ke ala maʻamau a nui loa e hoʻonohonoho ai i ka mana o nā mīkini ʻaila.

ʻO ka mea i komo i loko o ka pūnaewele

ʻO ka pahuhopu nui o kēia kūkulu ʻana, ʻo ia ka hoʻopaʻa pono ʻana o ka lako wahie cyclic, ʻo ia hoʻi, ka helu ʻana a me ka ʻoki ʻana i ka nui o ka ʻaila i makemake ʻia, e pili ana i ka nui o ka ea i hāʻawi ʻia i nā cylinders a me nā ʻāpana ʻenekini koʻikoʻi o kēia manawa. Hōʻoiaʻiʻo ʻia kēia ma ke ʻano o nā mea nui:

• aia ka pauma wahie i loko o ka pahu kinoea;
• ka mea hoʻoponopono kaomi a me ka laina wahie, hiki ke hoʻokahi a pālua paha, me ka hoʻihoʻi wahie;
• ramp me nā injectors (injectors) i hoʻomalu ʻia e nā mana uila;
• engine control unit (ECU), ʻoiaʻiʻo, he microcomputer me nā peripherals kiʻekiʻe, mau, rewritable a me ka hoʻomanaʻo ʻana;
• nā mea ʻike he nui e nānā i nā ʻano hana ʻenekini, ke kūlana o nā mana a me nā ʻōnaehana kaʻa ʻē aʻe;
• nā mea hana a me nā kiwi;
• ʻO nā lako hana hoʻomalu a me nā lako polokalamu paʻakikī, i hoʻohui piha ʻia i ka ECM.
• nā mea hou aku e hōʻemi ai i ka ʻona.

Hoʻokaʻawale ʻia nā mea hana ma loko o ke kaʻa mai ke kumu a hiki i ke keʻena ʻenekini, hoʻopili ʻia nā nodes e nā uwea uila, nā pahi ʻikepili kamepiula, nā wahie, nā ea a me nā laina vacuum.

Ka hana ʻana o nā ʻāpana pākahi a me nā mea hana holoʻokoʻa

Hāʻawi ʻia ka ʻaila mai kahi pahu paʻi ʻia e kahi pamu uila i laila. Ke hana nei ka kaʻa uila a me ka ʻāpana pamu i loko o ke kaiapuni o ka ʻaila, hoʻoluʻu ʻia lākou a lubricated me ia. Hoʻopaʻa ʻia ka palekana o ke ahi e ka nele o ka oxygen e pono ai no ka hoʻāla ʻana; ʻaʻole i ʻā ʻia kahi hui me ka ea i hoʻonui ʻia me ka ʻaila.

Ma hope o ʻelua kānana kānana, komo ka ʻaila i ka wahie. Mālama ʻia ke kaomi i loko o ia mea me ke kōkua o kahi mea hoʻoponopono i kūkulu ʻia i loko o ka paila a i ʻole ke kaʻaahi. Hoʻokuʻu hou ʻia ka nui i loko o ka pahu.

I ka manawa kūpono, loaʻa i nā electromagnets o nā injectors, i hoʻopaʻa ʻia ma waena o ka ramp a me ka intake manifold, e loaʻa i kahi hōʻailona uila mai nā mea hoʻokele ECM e wehe. Hoʻokomo maoli ʻia ka wahie i hoʻopaʻa ʻia i loko o ka valve intake, i ka manawa like e hoʻopuʻi a evaporating. Ma muli o ka paʻa o ka hāʻule ʻana o ke kaomi ma luna o ka injector, ʻike ʻia ka nui o ka ʻaila i hoʻolako ʻia e ka manawa wehe o ka valve injector. Hoʻololi ʻia ka hoʻololi ʻana o ka vacuum i loko o ka mea ʻohi e ka polokalamu hoʻoponopono.

ʻO ka manawa wehe nozzle kahi waiwai i helu ʻia ma ke kumu o ka ʻikepili i loaʻa mai nā mea ʻike.

• ka holo ʻana o ka ea nui a i ʻole ke kaomi piha ʻana;
• ka wela kinoea komo;
• degere wehe throttle;
• ka loaʻa ʻana o nā hōʻailona o ka puhi ʻana o ka detonation;
• ka wela o ka mīkini;
• ka pinepine o ka rotation a me nā ʻāpana o ke kūlana o ka crankshaft a me nā camshafts;
• ka loaʻa ʻana o ka oxygen i loko o nā kinoea hoʻopau ma mua a ma hope o ka catalytic converter.

Eia hou, loaʻa i ka ECM ka ʻike mai nā ʻōnaehana kaʻa ʻē aʻe ma o ka bus data, e hāʻawi ana i ka pane ʻenekini i nā kūlana like ʻole. Mālama mau ka papahana poloka i ke kumu hoʻohālike makemakika torque o ka ʻenekini. Ua kākau ʻia kona mau mea mau ma nā palapala ʻāina mode multidimensional.

Ma waho aʻe o ka hoʻokele injection pololei, hāʻawi ka ʻōnaehana i ka hana o nā mea ʻē aʻe, coils a me nā spark plugs, tank ventilation, thermal stabilization a me nā hana ʻē aʻe he nui. Loaʻa i ka ECM nā lako a me nā lako polokalamu e hana i ka ʻike pilikino a hāʻawi i ka mea hoʻokele me ka ʻike e pili ana i ka hiki ʻana mai o nā hewa a me nā hana hewa.

I kēia manawa, hoʻohana wale ʻia ka hoʻoheheʻe ʻana i kēlā me kēia cylinder. I ka wā ma mua, ua hana like nā injectors i ka manawa like a i ʻole nā ​​​​pālua, akā ʻaʻole kēia i hoʻokō i nā kaʻina hana i loko o ka mīkini. Ma hope o ka hoʻokomo ʻia ʻana o nā sensor kūlana camshaft, ua loaʻa i kēlā me kēia cylinder ka mana ʻokoʻa a me nā diagnostics.

Nā hiʻohiʻona hiʻohiʻona, nā pono a me nā hemahema

Hiki iā ʻoe ke hoʻokaʻawale i ka MPI mai nā ʻōnaehana injection ʻē aʻe ma ke alo o nā nozzles pākahi me kahi ala maʻamau i kuhikuhi ʻia i loko o ka manifold. ʻO ka pahu pahu hoʻokahi kahi injector hoʻokahi i pani i kahi o ka carburetor a ua like ke ʻano me ia. ʻO ka hoʻokomo pololei ʻana i loko o nā keʻena puhi ahi he mau nozzles e like me nā mea hoʻoheheʻe diesel me kahi pamu kaomi kiʻekiʻe i kau ʻia ma ke poʻo o ka poloka. ʻOiai i kekahi manawa, no ka hoʻopaʻi ʻana i nā hemahema o ka injection pololei, ua hoʻolako ʻia me kahi ala hana like e hoʻolako i kahi ʻāpana o ka wahie i ka manifold.

ʻO ka pono e hoʻonohonoho i ka hoʻopau maikaʻi ʻana i nā cylinders i alakaʻi i ka hoʻomohala ʻana i nā lako MPI. Hoʻokomo ka wahie i ka hui ʻana i kahi kokoke loa i ke keʻena kuni, hoʻopuʻu maikaʻi a evaporates. Hāʻawi kēia iā ʻoe e hana i nā huila lean loa, e hōʻoia ana i ka pono.

Hiki ke hoʻokō i nā maʻamau o nā mea ʻawaʻawa e hoʻonui mau ana. I ka manawa like, ʻoi aku ka liʻiliʻi o nā kumukūʻai lako, ʻoi aku ka liʻiliʻi o nā mīkini me MPI i ka hana ʻana ma mua o nā ʻōnaehana injection pololei. ʻOi aku ka kiʻekiʻe a me ka lōʻihi, a ʻoi aku ka liʻiliʻi o ka hoʻoponopono. Hōʻike kēia mau mea āpau i ka mana nui o MPI i nā kaʻa hou, ʻoi aku ka nui o nā papa kālā.