The objective of this study is to numerically investigate the effect of cryogenic intake air temperature on the in-cylinder temperature and formation of exhaust emissions in a CI engine. The experimental setup was consisted of a single-cylinder diesel engine. The intake air temperature was varied from 18 °C to 40 °C, which was controlled by cooler and heater. Submodels were applied for the simulations of physical/chemical phenomenon of spray and combustion behaviors. The intake air temperature in numerical condition was varied from −18 °C to 18 °C. The numerical results were validated with experimental results for the reliability of this work. The results of this work were compared in terms of cylinder pressure, rate of heat release (ROHR), indicated specific nitrogen oxide (ISNO), indicated specific carbon monoxide (ISCO), ignition delay, in-cylinder temperature distributions, equivalence ratio distributions, NO mass fraction, and CO mass fraction. When the intake air temperature was decreased in steps of 9 °C, the cylinder temperature and cylinder pressure were decreased in steps of about 14.5 °C and 0.05 MPa, respectively. In all cases, the area where the NO formed in the cylinder was identified with the area of the high equivalence ratio and temperature in the cylinder. The amount of CO generation shows the similar distributions in the cylinder according to the intake air temperature conditions. However, the oxidation rate of formed CO under the low intake air temperature was lower than those of the high intake air temperature.

References

References
1.
Robert Bosch GmbH,
1999
,
Diesel-Engine Management
,
2nd ed.
,
Robert Bosch GmbH
, Graz, Austria.
2.
Han
,
D. S.
,
Lee
,
B. H.
,
Bae
,
M. J.
,
Chang
,
Y. J.
,
Jeon
,
C. H.
, and
Song
,
J. H.
,
2008
, “
A Numerical Study on the Spray Characteristics of a Marine Diesel Engine of Injection Spray Angle and Hole Diameter
,”
Spring Conference of KSME
, Gangwon-do, Repulbic of Korea, pp.
572
577
.
3.
Regulation (EC) No 715/2007 of the European Parliament and of the Council,
2007
, “
Regulation (EC) No 715/2007 of the European Parliament and of the Council
,”
Off. J. Eur. Union
, L(171), pp.
1
16
.
4.
Min
,
S. H.
, and
Suh
,
H. K.
,
2016
, “
The Effect of Nozzle Hole Geometry on the Small CI Engine Performances
,”
International Conference on Advanced Automotive Technology
, p.
322
.
5.
Park
,
S. W.
, and
Reitz
,
R. D.
,
2009
, “
A Gas Jet Superposition Model for CFD Modeling of Group-Hole Nozzle Sprays
,”
Int. J. Heat Fluid Flow
,
30
(
6
), pp.
1193
1201
.
6.
Han
,
S. W.
,
Kim
,
K. H.
, and
Bae
,
C. S.
,
2013
, “
Effects of Operating Parameters on Combustion Mode Transition Between Low Temperature Diesel Combustion and Conventional Combustion
,”
Spring Conference of KSAE
, Goyang-si, Republic of Korea, pp. 120--127.
7.
Yao
,
C. D.
,
Hu
,
J. T.
,
Geng
,
P. L.
,
Shi
,
J. J.
,
Zhang
,
D. F.
, and
Ju
,
Y. S.
,
2017
, “
Effects of Injection Pressure on Ignition and Combustion Characteristics of Diesel in a Premixed Methanol/Air Mixture Atmosphere in a Constant Volume Combustion Chamber
,”
J. Fuel
,
206
, pp.
593
602
.
8.
Park
,
S. H.
,
Kim
,
H. J.
, and
Lee
,
C. S.
,
2010
, “
Comparison of Experimental and Predicted Atomization Characteristics of High-Pressure Diesel Spray Under Various Fuel and Ambient Temperature
,”
J. Mech. Sci. Technol.
,
24
(
7
), pp.
1491
1499
.
9.
Pan
,
W.
,
Yao
,
C. D.
,
Han
,
G. P.
,
Wei
,
H. Y.
, and
Wang
,
Q. G.
,
2015
, “
The Impact of Intake Air Temperature on Performance and Exhaust Emissions of a Diesel Methanol Dual Fuel Engine
,”
J. Fuel
,
162
, pp.
101
110
.
10.
Senthil Kumar
,
K.
, and
Thundil Karuppa Raj
,
R.
,
2013
, “
Effect of Fuel Injection Timing and Elevated Intake Air Temperature on the Combustion and Emission Characteristics of Dual Fuel Operated Diesel Engine
,”
J. Proc. Eng.
,
64
, pp.
1191
1198
.
11.
Shin
,
D. H.
, and
Park
,
S. H.
,
2017
, “
Combustion and Exhaust Emission Characteristics by the Change on Intake Air Temperature in a Single Cylinder Diesel Engine
,”
Trans. KSAE
,
25
(
3
), pp.
336
343
.
12.
AVL GmbH
,
2013
, “
Fire Version 2013 Combustion Module Manual
,” AVL GmbH, Graz, Austria.
13.
AVL GmbH
,
2013
, “
Fire Version 2013.2 Spray Module Manual
,” AVL GmbH, Graz, Austria.
14.
AVL List GmbH
,
2013
, “
Fire Version 2013 ESE-Diesel (Engine Simulation Environment) Module Manual
,” AVL List GmbH, Graz, Austria.
15.
Bosch
,
W.
,
1966
, “
The Fuel Rate Indicator: A New Measuring Instrument for Display of the Characteristics of Individual Injection
,”
SAE
Paper No. 660749.
16.
Heywood
,
J. B.
,
1988
,
Internal Combustion Engine Fundamentals
,
McGraw-Hill
, New York, pp.
357
360
.
17.
Stephen
,
R. T.
,
2012
,
An Introduction to Combustion: Concepts and Applications
,
3rd ed.
,
McGraw-Hill
, New York, pp.
179
186
.
18.
Lee
,
S. S.
, and
Reitz
,
R. D.
,
2006
, “
Spray Targeting to Minimize Soot and CO Formation in Premixed Charge Compression Ignition (PCCI) Combustion With a HSDI Diesel Engine
,”
SAE
Paper No. 2006-01-0918.
You do not currently have access to this content.