A simulation study was performed to evaluate the potential fuel economy benefits of integrating a dual-mode SI-HCCI engine into various vehicle architectures. The vehicle configurations that were considered include a conventional vehicle and a mild parallel hybrid electric vehicle. The two configurations were modeled and compared in detail for a given engine size (2.0 L) over the EPA UDDS (city) and highway cycles. The results show that the dual-mode engine in the conventional vehicle offers a modest gain in vehicle fuel economy of approximately 5–7%. The gains were modest because the baseline (the SI engine in the conventional vehicle) is relatively advanced with a six-speed automated manual transmission. The mild parallel hybrid with the SI engine achieved 32% better fuel economy than the conventional vehicle in the city, but only 6% on the highway. For the dual-mode engine in the mild parallel hybrid, a specific control strategy was used to manipulate engine operation in an attempt to minimize the number of engine mode transitions and maximize the time spent in HCCI. The parallel hybrid with the dual-mode engine and modified control strategy provides dramatic improvements of up to 48% for city driving, demonstrating that the addition of HCCI has a more significant impact with mild parallel hybrids than with conventional vehicles. Finally, a systematic study of engine sizing provides guidelines for selecting the best option for a given vehicle application.

References

References
1.
Onishi
,
S.
,
Jo
,
S.
,
Shoda
,
K.
,
Jo
,
P.
, and
Kato
,
S.
,
1979
, “
Active Thermo Atmospheric Combustion (ATAC)—A New Combustion Process for Internal Combustion Engines
,”
SAE
Paper No. 790501. 10.4271/790501
2.
Najt
,
P.
, and
Foster
,
D.
,
1983
, “
Compression-Ignited Homogeneous Charge Combustion
,”
SAE
Paper No. 830264. 10.4271/830264
3.
Thring
,
R.
,
1989
, “
Homogeneous Charge Compression Ignition (HCCI) Engines
,”
SAE
Paper No. 892068. 10.4271/892068
4.
Stanglmaier
,
R.
, and
Roberts
,
C.
,
1999
, “
Homogeneous Charge Compression Ignition (HCCI): Beneftis, Compromises, and Future Engine Applications
,”
SAE
Paper No. 1999-01-3682. 10.4271/1999-01-3682
5.
Epping
,
K.
,
Aceves
,
S.
,
Bechtold
,
R.
, and
Dec
,
J.
,
2002
, “
The Potential of HCCI Combustion for High Efficiency and Low Emissions
,”
SAE
Paper No. 2002-01-1923. 10.4271/2002-01-1923
6.
Sjoberg
,
M.
,
Dec
,
J.
, and
Cernansky
,
N.
,
2005
, “
Potential of Thermal Stratification and Combustion Retard for Reducing Pressure-Rise Rates in HCCI Engines, Based on Multi-Zone Modeling and Experiments
,”
SAE
Paper No. 2005-01-0113. 10.4271/2005-01-0113
7.
Sjoberg
,
M.
, and
Dec
,
J.
,
2005
, “
Effects of Engine Speed, Fueling Rate, and Combustion Phasing on the Thermal Stratification Required to Limit HCCI Knocking Intensity
,”
SAE
Paper No. 2005-01-2125. 10.4271/2005-01-2125
8.
Yang
,
Y.
,
Dec
,
J.
,
Dronniou
,
N.
,
Sjöberg
,
M.
, and
Cannella
,
W.
,
2011
, “
Partial Fuel Stratification to Control HCCI Heat Release Rates: Fuel Composition and Other Factors Affecting Pre-Ignition Reactions of Two-Stage Ignition Fuels
,”
SAE
Paper No. 2011-01-1359. 10.4271/2011-01-1359
9.
Milovanovic
,
N.
,
Blundell
,
D.
,
Pearson
,
R.
,
Turner
,
J.
, and
Chen
,
R.
,
2005
, “
Enlarging the Operational Range of a Gasoline HCCI Engine by Controlling the Coolant Temperature
,”
SAE
Paper No. 2005-01-0157. 10.4271/2005-01-0157
10.
Lawler
,
B.
,
Ortiz-Soto
,
E.
,
Gupta
,
R.
,
Peng
,
H.
, and
Filipi
,
Z.
,
2011
, “
Hybrid Electric Vehicle Powertrain and Control Strategy Optimization to Maximize the Synergy With a Gasoline HCCI Engine
,”
SAE
Paper No. 2011-01-0888. 10.4271/2011-01-0888
11.
Delorme
,
A.
,
Rouseau
,
A.
,
Wallner
,
T.
,
Ortiz-Soto
,
E.
,
Babajimopolous
,
A.
, and
Assanis
,
D.
,
2010
, “
Evaluation of Homogeneous Charge Compression Ingition (HCCI) Engine Fuel Savings for Various Electric Drive Powertrains
,” EVS-25, Shenzhen, China.
12.
Ortiz-Soto
,
E.
,
Assanis
,
D.
, and
Babajimopoulos
,
A.
,
2012
, “
A Comprehensive Engine to Drive-Cycle Modelling Framework for the Fuel Economy Assessment of Advanced Engine and Combustion Technologies
,”
Int. J. Engine Res.
,
13
, pp
287
304
.10.1177/1468087411411615
13.
Morel
,
T.
,
Rackmil
,
C. I.
,
Keribar
,
R.
, and
Jennings
,
M. J.
,
1988
, “
Model for Heat Transfer and Combustion in Spark Ignited Engines and Its Comparison With Experiments
,”
SAE
Paper No. 880198. 10.4271/880198
14.
Chang
,
K.
,
Babajimopoulos
,
A.
,
Lavoie
,
G. A.
,
Filipi
,
Z. S.
, and
Assanis
,
D. N.
,
2006
, “
Analysis of Load and Speed Transitions in an HCCI Engine Using 1-D Cycle Simulation and Thermal Networks
,”
SAE
Paper No. 2006-01-1087. 10.4271/2006-01-1087
15.
Chang
,
K.
,
Lavoie
,
G. A.
,
Babajimopoulos
,
A.
,
Filipi
,
Z. S.
, and
Assanis
,
D. N.
,
2007
, “
Control of a Multi-Cylinder HCCI Engine During Transient Operation by Modulating Residual Gas Fraction to Compensate for Wall Temperature Effects
,”
SAE
Paper No. 2007-01-0204. 10.4271/2007-01-0204
16.
He
,
X.
,
Wooldridge
,
M.
, and
Atreya
,
A.
,
2005
, “
An Experimental and Modeling Study of Iso-Octane Ignition Delay Times Under Homogeneous Charge Compression Ignition Conditions
,”
Combust. Flame
,
142
, pp.
266
275
.10.1016/j.combustflame.2005.02.014
17.
Mo
,
Y.
,
2008
, “
HCCI Heat Release Rate and Combustion Efficiency: A Coupled KIVA Multi-Zone Modeling Study
,” Ph.D. dissertation, University of Michigan, Ann Arbor, MI.
18.
Woschni
,
G.
,
1967
, “
A Universally Applicable Equation for the Instantaneous Heat Transfer Coefficient in the Internal Combustion Engine
,”
SAE
Paper No. 670931. 10.4271/670931
19.
Chang
,
J.
,
Filipi
,
Z.
,
Assanis
,
D.
,
Kuo
,
T.-W.
,
Najt
,
P.
, and
Rask
,
R.
,
2004
, “
New Heat Transfer Correlation for the HCCI Engine Derived From Measurements of Instantaneous Surface Heat Flux
,”
SAE
Paper No. 2004-01-2996. 10.4271/2004-01-2996
20.
Wagner
,
R.
,
Edwards
,
K.
,
Daw
,
C.
,
Green
,
J.
, and
Bunting
,
B.
,
2006
, “
On the Nature of Cyclic Dispersion in Spark Assisted HCCI Combustion
,”
SAE
Paper No. 2006-01-0418. 10.4271/2006-01-0418
21.
Eng
,
J.
,
2002
, “
Characterization of Pressure Waves in HCCI Combustion
,”
SAE
Paper No. 2002-01-2859. 10.4271/2002-01-2859
22.
Santoso
,
H.
,
Matthews
,
J.
, and
Cheng
,
W.
,
2005
, “
Managing SI/HCCI Dual-Mode Engine Operation
,”
SAE
Paper No. 2005-01-0162. 10.4271/2005-01-0162
23.
Liu
,
J.
,
2007
, “
Modeling, Configuration and Control Optimization of Power-Split Hybrid Vehicles
,” Ph.D. dissertation, University of Michigan, Ann Arbor, MI.
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