Ko te kaupapa mahi o te kaitahuri whakaterenga-toru-ara: ina wera te putanga hau o te motuka mā te taputapu horoi, ka whakarei ake te kaihoroi i roto i te kaitahuri whakaterenga-toru-ara i te mahi a ngā momo hau e toru o te CO, ngā warowaihā me te NOx, hei whakatairanga i tana tauhohenga matū whakahāora-whakaiti, ka huri te whakahāora CO i te pāmahana teitei hei hau kore tae, kore-paitini; ka whakahāorahia ngā warowaihā ki te wai (H2O) me te warowaihā i ngā pāmahana teitei; ka whakaitihia te NOx ki te hauota me te hāora. Ka hurihia ngā momo hau kino e toru ki te hau kore-kino, kia taea ai te horoi i te putanga hau o te motuka. Ki te mea kei te wātea tonu te hāora, he tika te ōwehenga hau-wahie.
Nā te kounga iti o te wahie i Haina, kei roto i te wahie te whanariki, te whākawa, ā, kei roto i te MMT te konupūmā. Ka hangaia e ēnei wāhanga matū he matū matatini ki runga i te mata o te pūoko hāora me roto i te kaitahuri whakaterenga-toru-ara, ka tukuna te hau putanga i muri i te tahunga. Hei tāpiri, nā te āhua taraiwa kino a te taraiwa, te taraiwa roa rānei i runga i ngā rori kīkī, he maha ngā wā ka noho te miihini i roto i te āhua tahunga kāore i oti, ka puta he kohikohinga waro i roto i te pūoko hāora me te kaitahuri whakaterenga-toru-ara. Hei tāpiri, he maha ngā rohe o te whenua e whakamahi ana i te penehīni etanoru, he kaha te pānga horoi, ka horoi i te unahi i roto i te rūma tahunga engari kāore e pirau, e tahu, nō reira, me te tukunga o te hau para, ka whakatakotoria hoki ēnei paru ki runga i te mata o te pūoko hāora me te kaitahuri whakaterenga-toru-ara. Nā te maha o ngā āhuatanga e whakararuraru ana i te motuka i muri i te taraiwa mō te wā maero, hei tāpiri atu ki te kohikohinga waro i roto i te takirere whakauru me te rūma mura, ka raru anō hoki te paihana o te pūoko hāora me te kaitahuri whakateretoru-ara, ka aukatia te kaitahuri whakateretoru-ara me te takirere EGR e te paru kua mau me ētahi atu pakaru, ka hua ake he mahi rerekē o te miihini, ka hua ake he pikinga o te kai wahie, he hekenga o te mana me te nui haere o te hauhautanga i te paerewa me ētahi atu raruraru.
Ko te tiaki auau o te mīhini tuku iho e herea ana ki te tiaki taketake o te pūnaha whakahinuhinu, te pūnaha whakauru me te pūnaha tuku wahie, engari kāore e taea te whakatutuki i ngā whakaritenga tiaki whānui o te pūnaha whakahinuhinu mīhini hou, te pūnaha whakauru, te pūnaha tuku wahie me te pūnaha whakaputa hau, inā koa ko ngā whakaritenga tiaki o te pūnaha whakahaere tukunga. Nō reira, ahakoa he tiaki noa te waka mō te wā roa, he uaua ki te karo i ngā raruraru o runga ake nei.
Hei whakautu i ēnei hapa, ko ngā mahi a ngā umanga tiaki he whakakapi i ngā pūoko hāora me ngā kaitahuri hiko-toru. Heoi, nā te raruraru o te utu whakakapinga, kei te haere tonu ngā tautohe i waenga i ngā umanga tiaki me ngā kiritaki. Ina koa ko te hunga kāore i te roa te wā e whakakapia ai ngā pūoko hāora me ngā kaitahuri hiko-toru, he maha ngā wā ka puta he tautohe, ā, he maha ngā kiritaki i kī ko te kounga o te motuka te take o te raruraru.
