Diiselmootori toitesüsteemi pihustusrõhu mõju tahma moodustumisele
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Kuupäev
2020
Kättesaadavus
02.09.2020
Autorid
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Eesti Maaülikool
Abstrakt
Tahma moodustumine diiselmootoris on suureks probleemiks keskkonnale ja inimeste
tervisele. Seetõttu on oluline uurida erinevate mootori juhtparameetrite mõju tahma
osakalule diiselmootori heitgaasides.
Töö eesmärgiks oli uurida pihustusrõhu mõju tahma moodustumisele diiselmootoris.
Töös uuriti pihustusrõhu mõju tahma moodustumisele ühisanumtüüpi toiteaparatuuriga
diiselmootoris, kasutades diislikütust (E-klassi) ja biodiislikütust (HVO biodiislikütus).
Mootori kiirusrežiimiks oli 2300 p/min, koormusteks 50, 75 ja 100%. Katsemootoriks oli
common rail (ühisanum) sissepritse süsteemiga AVL 5402 CR DI mootor. Eesti
Maaülikooli Tehnikamaja mootorilaboris mõõdeti vastavate seadmete abil tahma ja
heitgaaside osakaalude muutused pihustusrõhu tõusmisel.
Töö tulemustena selgus, et rõhu tõusmine vähendab tahma moodustumist vaid selle
tõusmisel kuni 650 bar-ni. Edasisel rõhu tõusmisel hakkas tahma kogus kasvama. Saadud
andmete järgi, kõige suuremat mõju tahmasuse vähenemisele avaldab pihustusrõhk 650
bar, mootori koormusel 75%. Lisaks selgus, et HVO biolisandiga diislikütus võrreldes
tavalise diislikütusega vähendab tahma moodustumist 25% võrra mootori koormustel
50% ja 100%.
Increased soot formation is an important problem for the whole ecology, including humans health and nature well-being. Therefore, it is important to study the effect of different engine main parameters on the soot content in diesel engine exhaust gases. The aim of this work is to study the effect of injection pressure on soot formation. The effect of injection pressure on soot formation was investigated in diesel engine with common rail fuel injection system, using two diesel fuels (E-class and HVO biodiesel) at engine speed 2300 rpm and three engine loads. The experiment was performed on AVL 5402 CR DI engine. Using the equipment in the engine laboratory of Estonian University of Life Sciences, the changes in amount of soot in exhaust gases with increasing pressure were measured. As a result of the investigation, it was found that an increase in injection pressure reduses soot formation only till it rises to 650 bar. When it rises further the amount of soot starts to increase. According to obtained data, the most serious effect on the reduction of soot formation was achieved by injection pressure 650 bar at an engine load of 75%. Also, it was found that HVO biodiesel at 50% and 100% engine loads is more effective than diesel fuel and reduces soot formation by 25%.
Increased soot formation is an important problem for the whole ecology, including humans health and nature well-being. Therefore, it is important to study the effect of different engine main parameters on the soot content in diesel engine exhaust gases. The aim of this work is to study the effect of injection pressure on soot formation. The effect of injection pressure on soot formation was investigated in diesel engine with common rail fuel injection system, using two diesel fuels (E-class and HVO biodiesel) at engine speed 2300 rpm and three engine loads. The experiment was performed on AVL 5402 CR DI engine. Using the equipment in the engine laboratory of Estonian University of Life Sciences, the changes in amount of soot in exhaust gases with increasing pressure were measured. As a result of the investigation, it was found that an increase in injection pressure reduses soot formation only till it rises to 650 bar. When it rises further the amount of soot starts to increase. According to obtained data, the most serious effect on the reduction of soot formation was achieved by injection pressure 650 bar at an engine load of 75%. Also, it was found that HVO biodiesel at 50% and 100% engine loads is more effective than diesel fuel and reduces soot formation by 25%.
Kirjeldus
Bakalaureusetöö
Tootmistehnika õppekaval
Märksõnad
bakalaureusetööd, diislikütused, pihustusrõhk, toitesüsteemid