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SI (E100) E85Improvement on the Performance of Spark Ignition Engine
using Ethanol (E100) and Gasohol E85 Fuel
* . .34190
*Email: [email protected]
95 (E100) E85 91 4
K230 232 6.4:1 3 2 95 (E100) E85
50 91 1,800, 2,100, 2,400, 2,700, 3,000 3,300 95 (E100) E85
95 (E100) E85
: (E100) E85Abstract
This research aimed to investigate the modification and performance of two spark ignition engines, oneusing 95 ethanol as the sole fuel (E100) and the other using ethanolgasoline blend (E85). Thesewere compared with an engine fueled by gasoline 91 that acted as a control. The engines used were 4-stroke,gasoline, single cylinder, model K 230 (Siam Kubota) engines, each with a compression ratio of 6.4:1 and acarburetor fuel feeding system. The two experimental engines were modified by changing the main jet sizes inthe carburetors and locking the air valves at 50 percent opening. The brake torque, brake power, and brakespecific fuel consumptions at 1800, 2100, 2400, 2700, 3000, and 3,300 rpm were measured. It was found that
the engines using 95 ethanol as the sole fuel (E100) and ethanolgasoline blend E85 with the properair-fuel ratios achieved brake torque and power close to the normal gasoline engine. However, the brakespecific fuel consumption was higher than that of the gasoline engine. It may be concluded that the 95 ethanol (E100) and the ethanolgasoline blend E85 can be used as a substitute fuel for smallengines, but that the engines require correct modifications.
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Keywords:Performance of engine, Ethanol (E100), Ethanolgasoline blend (E85)
1.
MTBE (Methyl Tertiary-Butyl
Ether) 95 1 2549 3 MTBE 95 91 2554 [2] [11]
99.5 95
[15]
[16, 10] [3] E85 15 85 E85 95 91
[7]
1. E85
95 91 (Low heatingvalue) 30
2. (Heat ofvaporization) 3
[1]
85 (E85)
95 (E100) 91
2. 2.1
Siam Kubota K230
1 3 1 91 2 3 95 (E100) E85 2
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Stoichiometric air / fuel ratio A/F 14.6 95 8.7 E85 10
E85
[8]
E85 2 50 1 (Main
jet) 0.71
0.85 E100 1.0 2
1[5]
Name and model of
ngine Siam Kubota, k230General details Single cylinder, SI engine, air cooled
6.4:1
74 mm.54 mm.
Compression ratio
BoreStroke
displacement 232 cc.
2 ([4, 14, 15])
1 2
Characteristic of fuel Gasoline Gasohol (E85) Ethanol (E100)Chemical FormulaSpecific Gravity
Net heating value (MJ/l)
C8.26H15.50.72 - 0.78
32.2
CH2.822O0.4250.70 - 0.79
23.9
C2H6.16O1.080.8120.2
Research Octane Number 92 - 98 95.0 min 106Motor Octane NumberStoichiometric A/F ratio
80-9014.6
85.0 min10
878.7
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2.2 MT 501
ENGINE DYNAMOMETER 3 1,0007,500
10 TRANSTRONIC TA SHEAR BEAM
3
4
2.3
()
board 80
20
(Air consumption) (Air box) x 220 x 350 (Orifice) 30 kg/s
4
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1 5 0 0 1 8 0 0 2 1 0 0 2 4 0 0 2 7 0 0 3 0 0 0 3 3 0 0 3 6 0 0
0
1
2
3
4
E 0
E 8 5 - M 1
E 8 5 - M 2
E 1 0 0
BrakePower(kW
)
E n g i n e S p e e d ( r p m )
4 3
1. 91 (E0)2. E85
50 (E85-M1)
3. E85 (E85-M2)
4. 95 E100 (E100)
2,000 10
1,800, 2,100,2,400, 2,700, 3,000 3,300 1 2
60x1000TN2
Pb
= (1)
Pb (kW)T (Nm)
N (rpm)
PbnconsumptioFuel
BSFC = (2)
BSFC
(kg/kw.h)Fuel consumption
(kg/h)Pb (kW)
3.
4 91 E85 95
5
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15 0 0 1 80 0 2 10 0 2 4 00 2 7 00 3 0 0 0 33 0 0 3 60 0
6
7
8
9
1 0
1 1
1 2
Torque(N.m)
E n g i n e S p e e d ( rp m )
E 0
E 8 5 -M1
E 8 5 -M2
E 1 0 0
1 5 0 0 1 8 00 2 1 0 0 2 4 0 0 27 0 0 3 00 0 33 0 0 3 60 0
0 .0
0 .2
0 .4
0 .6
0 .8
E 0
E 8 5 -M1
E 8 5 -M2
E 1 0 0
BSFC(kg/kW.h)
E n g i n e S p e e d ( r p m )
6
7
5 91
E85 E100 50
91 E85 E100
6 91 E85 95 E100 50
91 2,700
7 (BSFC)
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95 (E100) E85 50 91
95 (E100) E85 91
E85 95
[13], [9]
4. 4 Siam
Kubota K230 3 91 E85 95(E100) 50
E85
50 91 E85 95 (E100) 91 6.42 5.34
E85 50
91 E85 95 (E100) 6.84
E85 50 91 47.58 28.49 95(E100) 91 53.22
E85
91 16 13 ( 2553)
9118 / E85 13 / 15.50 / [12], [6]
91
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[1] . 2551
.
22
15-17. 2551.[2] , ,
.2551. . :
[3] .2547. SI.
18 - 18-20 2547.[4] , ,
.2546. . 17 15 17 2546.
[5] , K150, K230.
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