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201
EFFICIENCY OF USING ALCOHOL IN AUTOMOBILES
I.Z. Nasi o 1, I.U. Nosi aliye 2
P o esso , D.Sc. in Enginee ing, Andijan S a e Technical Ins i u e1
PhD Candida e, Kokand S a e Uni e si y2
h ps://doi.o g/10.5281/zenodo.17289542
Abs ac . An alcohol eac o was ins alled in he in ake sys em o he "Onix" au omobile
engine and es ed. Acco ding o he esul s o he expe imen s, he con en o ca bon monoxide
(CO) in he exhaus gases dec eased by 1.28% and he amoun o unbu ned hyd oca bons (CH)
dec eased by 2.10%. The annual economic e iciency amoun ed o 26,369,812 UZS/yea , he
payback pe iod was 0.04 yea s, and he e iciency coe icien eached 26.37.
Keywo ds: labo a o y es , ca bon monoxide (CO), unbu ned hyd oca bons (CH), in ake
sys em, alcohol eac o , economic e iciency, payback pe iod, e iciency coe icien .
In oduc ion
Cu en ly, he g ow h o he wo ld’s popula ion, he eme gence o a ious ecological
p oblems, and he pollu ion o he en i onmen a e causing nume ous global challenges. Fo his
eason, on No embe 20, 2024, he Hono able P esiden o he Republic o Uzbekis an, Sha ka
Mi ziyoye , p oposed decla ing he yea 2025 in ou coun y as he “Yea o En i onmen al
P o ec ion and G een Economy” a a session o he Oliy Majlis [1].
Acco ding o ecen da a, one o he ac o s leading o a mosphe ic ai pollu ion wo ldwide
is mo o ehicles, which accoun o nea ly 70% o he o al ai pollu ion. Exhaus gases (EG) om
au omobiles ha e he g ea es impac on he composi ion and quali y o he a mosphe e as
pollu an s [2,3].
Figu e. Alcohol eac o ins alled on a “Cobal ” au omobile.
In he u u e, ensu ing ene gy, ecological, and economic secu i y in he Republic o
Uzbekis an, as well as sus ainable de elopmen o he ene gy sec o , will undoub edly equi e he
use o enewable ene gy sou ces. A necessa y condi ion o p ese ing na u al esou ces o u u e
gene a ions and p o ec ing he en i onmen is he de elopmen o enewable and al e na i e
ene gy sou ces.
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In Uzbekis an, many scien i ic and enginee ing p ojec s a e being ca ied ou o educe he
amoun o oxic gases emi ed om ehicles. One such app oach is o educe he amoun o ha m ul
subs ances in exhaus gases by using alcohol apo s in engines, he eby con ibu ing o
en i onmen al p o ec ion [4,5].
Fo his pu pose, an ex e nal eac o was cons uc ed and ins alled on a ious models o
ca s p oduced a “UzAu o Mo o s” JSC (Figu e), and i was es ed unde bo h labo a o y and oad
condi ions [6].
Resul s o oad condi ion es s
№
Types o
uel–ai
mix u e
C anksha
speed, pm
Engine
powe ,
kW
Fuel
consu
mp io
n, L/h
Alcohol
consum
p ion,
L/h
CO con en
in exhaus
gases, %
HC con en
in exhaus
gases, %
1.
Con en ional
gasoline–ai
mix u e
(con ol)
2350
51,3
6,69
-
4,06
5,15
2.
Alcohol–ai
mix u e
2350
48,5
-
15,31
0,27
0,21
3.
Con ol +
alcohol
2350
55,6
4,98
6,58
1,89
1,30
F om he able i can be seen ha when he au omobile ope a ed on a con en ional
gasoline–ai mix u e (con ol), he engine powe was 51.3 kW; when ope a ed on an alcohol–ai
mix u e, i dec eased o 48.5 kW; whe eas wi h con ol + alcohol ope a ion, i inc eased up o 55.6
kW. Fuel consump ion on he con ol was 6.69 L/h, on he alcohol–ai mix u e i was absen , and
on con ol + alcohol ope a ion i was 4.98 L/h. Alcohol consump ion was ze o in he con ol, 15.31
L/h wi h he alcohol–ai mix u e, and 6.58 L/h wi h con ol + alcohol. The CO con en in he
exhaus gases was 4.06% in he gasoline–ai mix u e, 0.27% in he alcohol–ai mix u e, and 1.89%
in he con ol + alcohol mode. Simila ly, he unbu ned hyd oca bons (CH) con en amoun ed o
5.15%, 0.21%, and 1.30%, espec i ely [7].
When he alcohol eac o de ice was ins alled in he in ake sys em o he “Onix”
au omobile engine, i s economic e iciency was de e mined. I was es ablished ha when he
engine ope a ed on con en ional uel (gasoline), he cos pe 1 km o a el was 2430.30 UZS/km,
wi h 1 li e o gasoline co e ing 15 km. When he alcohol eac o was ins alled in he in ake
sys em, 1 li e o gasoline allowed he ehicle o co e 19 km, he cos pe 1 km was educed o
2275.92 UZS/km, he annual economic e iciency amoun ed o 26,369,812 UZS/yea , he payback
pe iod was 0.04 yea s, and he e iciency coe icien eached 26.37 [8].
Conclusion. The esul s o his s udy demons a e ha he use o alcohol eac o s in
au omobile engines is no only en i onmen ally bene icial bu also economically and p ac ically
e icien . The signi ican educ ion o ca bon monoxide (CO) and unbu ned hyd oca bons (CH) in
exhaus gases se es as an impo an ac o in p e en ing a mosphe ic ai pollu ion. A he same
ime, he educ ion in uel consump ion and he annual economic bene i exceeding 26 million
UZS ep esen a majo ad an age o he p ac ical implemen a ion o his de ice.
F om a heo e ical pe spec i e, he use o alcohol apo s ensu es mo e comple e
combus ion o he uel–ai mix u e, he eby posi i ely in luencing he he modynamic p ocesses
SCIENCE AND INNOVATION
INTERNATIONAL SCIENTIFIC JOURNAL VOLUME 4 ISSUE 9 SEPTEMBER 2025
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203
o in e nal combus ion engines. This, in u n, s eng hens he scien i ic ounda ions o mi iga ing
global en i onmen al p oblems and o he e ec i e use o enewable uels. The e o e, in he
u u e i is necessa y o de e mine he op imal a io o alcohol wi h a ious uels and o de elop
scien i ically g ounded ecommenda ions o nex -gene a ion engines.
F om a p ac ical s andpoin , alcohol eac o s a e an inno a i e solu ion wi h high e iciency
ha pays o i sel in a sho pe iod o ime. Th ough he se ial p oduc ion o his echnology a
local au omobile manu ac u ing plan s, i will be possible o c ea e addi ional jobs, educe he
olume o uel impo s, and inc ease he sha e o a o dable and en i onmen ally iendly ehicles
in he domes ic ma ke . Fu he mo e, by a ac ing bo h o eign and local in es o s, he la ge-scale
implemen a ion o his echnology will se e as an impo an s ep in ealizing he “g een economy”
concep in ou coun y.
The esul s o his esea ch ep esen a echnological solu ion ha can be applied no only
unde he condi ions o Uzbekis an bu also on a global scale. The in oduc ion o he alcohol
eac o p o ides no only economic e iciency bu also con ibu es o he s a egy o sus ainable
ecological de elopmen . This c ea es an oppo uni y o he e icien u iliza ion o con en ional
oil and gas uels, whose ese es a e apidly deple ing wo ldwide.
Ul ima ely, his wo k ensu es mo e e icien use o con en ional oil and gas uels,
imp o emen o engine pe o mance, and educ ion o he mos ha m ul exhaus emissions—
ca bon oxides and unbu ned hyd oca bons. In he u u e, i will be necessa y o s udy he po en ial
o using di e en ypes o alcohol—e hanol, me hanol, and bioe hanol—as well as o conduc hei
compa a i e analysis. This will allow u he enhancemen o he ecological and economic
pe o mance indica o s o au omobile engines.
REFERENCES
1. Nasi o , I. Z., & U ino , D. O. (2021). The echnology o ob aining en i onmen ally clean
uel o ehicles. Scien i ic and Technical Jou nal o NamIET, Namangan: NamMTI, 188–
193.
2. Rakhmono , Kh. N., & Nasi o , I. Z. (2021, Augus 5). Obogashchenie sin ez gazom opli o-
ozdushnoy smesi DVS. In P oceedings o he In e na ional Scien i ic-P ac ical Con e ence
“Mode n Technologies: P oblems o Inno a i e De elopmen and Implemen a ion o Resul s”
(pp. 21–25). Pe oza odsk: MCNP “No aya Nauka”.
3. Nasi o , I. Z., U ino , D. O., & Rakhmono , Kh. N. (2021). Reak o la ning a omobil
ko‘ sa kichla iga a’si i. Polish Science Jou nal. In e na ional Science Jou nal, 4(37), 356–
360. Wa saw, Poland: Wydawnic wo Naukowe “iScience”.
