Nghiên cứu ảnh hưởng của việc điều chỉnh góc phun sớm đến hàm lượng phát thải (NOx, bồ hóng) và công

Tap chi Khoa hoc - Cong nghe Thdy sdn So 2/20141

KET QUA NGHIEN CLfU DAO TAO SAU DAI HOC

NGHIEN ClTU ANH HlTOfNG CUA VIEC 0IEU CHINH GOC PHUN S6 M DEN

HAM LUONG PHAT THAI (NOx, BO HONG) VA C6N G SUAT CUA DONG CO

DIESEL Of CAC CHE DO TAI KHAC NHAU BANG PHU^ONG PHAP M 6 PHONG

STUDY EFFECTS OF EARLY TO SPRAY ANGLE ADJUSTMENT EMISSIONS LEVELS

(NOx, SOOT) AND POWER OF DIESEL ENGINE LOAD INA DIFFERENT MODE

BY SIMULATION

Nguyen Nhgt Lai', Phung Minh l^

Ngay nhan bar 15/6/2013; Ngay phan bien thong qua: 25/11/2013; Ng^y duy^l dang- 02/6/2014

T OM TAT

Bai bao ndy trinh bdy vi^c sd dung phdn mem mo phong da chieu KIVA de nghien ciru dnh huang cua goc phun sm

den phdt thdi (NOx, bo hong) vd cdng sudt iren dpng co moi xy lanh A VL 5402 vdi cac che do tdi 40%, 60%, 80%. Kel qua

mo phong dupc thuc nghiem kiim chung da chi ra gid tri lot uu cualhdi diem phun Iheo cdng sudt vd hdm lu(mgphdt that

ciia dong co nghien ciiu

Tir Idioa • gdc phun sdm, phdt thdi, phdn mem mo phdng. KJVA

ABSTRACT

This paper presenls the use of simulation software to study multidimensional KJVA spray early influence oftheNOi

emissions, soot, on an engine cylinder mode AVL 5402 with 40%. 60%. 80% loads. The simulation results are verified

experimentally showed optimal values of injection lime according lo the capacity and function of engine emissions research.

Keywords: early spray, exhaust, software simulation. KIVA

I. DAT VA N oe

Nhien lieu diesel dupe phun vdo buong ehdy

chua ddy khbng khi cb nhiet db cao trong hdnh trinh

ndn, do do ning db eua hbn hpp nhien lieu vd khdng

khf trong xy lanh tgi cac diem khde nhau la khae

nhau. Khi thai dupc hinh thdnh td kit qua eua qud

trinh ehdy cua hbn hpp khbng khi/nhidn lidu khbng

ding nhat nay. Cde qud trinh hda trpn nhien lidu

trudc khi chay nhu thdi gian ehdy tre, chat lupng

tia phun, thdi gian luu tni eCia nhien lidu trong cac

vung nhidt dp khde nhau, thdi gian gidn nd, thdng so

phun nhien lieu... dbng vai trd quan trpng trong viec

hinh thanh khf thdi [4]. Ham lupng CO vd HC cua

dbng ca diesel nhd han dbng ca xdng, nhung NOx

vd b l hbng (muoi than, particulate matter- PM) cao

han nhieu [5]. Ddy ehinh Id diem yeu eua dpng ea

diesel va d n nghien ciru khde phye.

Gldi quylt van d l tren la mbt nhigm vu rat phde

tgp, chl cb thl dgt duac bdng ket hpp dong thdi

thyc nghidm vd md phdng. Mb phdng (simulation)

id phuang phdp mb hinh hba dya tren vide thiet

lap mb hinh sd vd sir dgng phuang phap so dl fim

ra idi gidi vdi sy trp- giCip eiia may tfnh [6]. Mac dO

eae thdng so mb phbng cb the khbng chlnh xac niiir

thuc nghigm, phuang phdp ndy vdn ed nhung iw

diem noi trpi vd huu ieh eho vigc phat tnln dbng ca.

Trdn quan dilm ndy, rb rang ddy la phuang phip

"khdng thl thilu" hign nay tai cdc trung tdm nghien

cuu Idn tren thl gidi, dgc bigt khi tien hdnh dc

nghidn cdu v l bien dli Uidng so, vi hidu qud cao

han han vipc thay dl i kit d u dbng ca vd c» the

nghien cdu trdn nhieu miu dbng ca khde nhau.

Cde uu dilm ehinh ciia phuang phap hi6

phbng la:

- Cd thl thay dli dd ddng tat ea d c thbng s6

c^n nghien cdu,

- Cd the dp dgt cdc dieu ki^n ban d^u tren m$t

dai r0ng;

- Cb thl nghien cuu tdch bigt tdng qud trinh con

trong tong thl qud trinh chdy;

' Nguyen Nh|t Lai: Cao hpc Ky ttiugt tau thOy 2009 - Tnj-dng Dgi hgc Nha Trang

= TS. Phung Minh Lpc Khoa Ky thuat giao thong - Tnj-dng Dgi hgc Nha Trang

106 • TRLfONG OAI HOC NHA TRANG