Environmental Engineering Reference
In-Depth Information
exceeding SI and matching diesel. While these characteristics of LTC can
address increasing environmental regulatory demands, there are some funda-
mental challenges. To practically implement residual-affected LTC, closed-
loop control must be used for several reasons: there is no direct combustion
trigger; cycle-to-cycle and cylinder-to-cylinder dynamics exist through the resi-
dual gas temperature; multiple combustion modes are required; and early fuel
delivery is required and difficult. Although LTC is a complex physical process,
this chapter has reviewed modeling efforts which show that the aspects most
relevant for control - in-cylinder pressure evolution, combustion timing, work
output and cycle-to-cycle dynamics - can be captured in relatively simple and
intuitive physics-based simulation and control models. In a specific case, it is
shown that from physics-based ''control models'' a variety of generalizable
strategies can be developed to control LTC. Work must continue in this area
to develop production-viable engines utilizing LTC.
References
1. DOE. Department of Energy (DOE) Annual Energy Outlook 2006: With Projections to
2030. Energy Information Administration, Office of Integrated Analysis and Forecast-
ing, U.S. Department of Energy, Washington, DC 20585, 2006.
2. J.B. Heywood et al. The Performance of Future ICE and Fuel Cell Powered Vehicles and
Their Potential Fleet Impact. John B. Heywood, Malcolm A. Weiss, Andreas Schafer,
Stephane A. Bassene, and Vinod Natarjan. Energy Laboratory Report # MIT EL 04P-
254, December 2003.
3. M.A. Weiss et al. On the Road in 2020: A life-cycle analysis of new automobile technol-
ogies. Malcolm A. Weiss, John B. Heywood, Elisabeth M. Drake, Andreas Schafer, and
Felix F. AuYeung. Energy Laboratory Report # MIT EL 00-003 Energy Laboratory,
October 2000.
4. D.M. Chon and J.B. Heywood, ''Performance Scaling of Spark-Ignition Engines: Corre-
lation and Historical Analysis of Production Engine Data,'' SAE paper no. 2000-01-0565,
presented at 2000 SAE World Congress & Exposition, Cobo Center, Detroit, MI, March
6-9, 2000.
5. S. Midlam-Mohler, Y. Guezennec, G. Rizzoni, S. Haas, H. Berner, and M. Bargende,
''Mixed-mode HCCI/DI with external mixture preparation,'' FISITA 2004 World Auto-
motive Congress, 2004.
6. S. Onishi, S.H. Jo, K. Shoda, P.D. Jo, and S. Kato. Active thermo-atmosphere combus-
tion (ATAC) - a new combustion process for internal combustion engines. SAE 790501,
1979.
7. M. Noguchi. A study on gasoline engine combustion by observation of intermediate
reactive products during combustion. SAE 790840, 1979.
8. P.M. Najt and D.E. Foster. Compression-ignited homogeneous charge combustion. SAE
830264, 1983.
9. R.H. Thring. Homogeneous-charge compression ignition (HCCI) engines. SAE 892068,
1989.
10. J.R. Smith, S.M. Aceves, C.K. Westbrook, and W.J. Pitz. Modeling of homogeneous
charge compression ignition (HCCI) of methane. Proceedings of the 1997 ASME Internal
Combustion Engine Fall Technical Conference, 1997-ICE-68, 29:85-90, 1997.
11. M. Christensen, B. Johansson, P. Amneus, and F Mauss. Supercharged homogeneous
charge compression ignition. SAE 980787, 1998.
