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Development of the Mercedes-Benz CNG-Engine M447hLAG
Technical Paper
2000-01-3271
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The combustion development of the Mercedes-Benz CNG-engine M447hLAG is discussed. This engine represents the evolution of the naturally aspirated CNG- engine M447hG [1], which will be used to exemplify the improvements achieved. The main application of the M447hLAG is the new Mercedes-Benz urban bus O530 Citaro, which is produced by EvoBus in Germany. Two power ratings are currently available:
- 240 kW @2000 min-1, with maximum torque 1250 Nm @1500 min-1
- 185 kW @2000 min-1, with maximum torque 1050 Nm @1300 min-1
The engine displacement is 11.967 liters, with 6 horizontal in-line cylinders. The combustion concept is lean-burn with closed-loop mixture control, turbocharger and charge cooler, similar to the Mercedes-Benz CNG- Engine M366LAG [2], providing low emission levels and low fuel consumption.
The new engine management system further provides fuel injection, mapped ignition timing, full airflow control and total compatibility with the Mercedes-Benz Star-Diagnose and 24V CAN system used in the new Mercedes-Benz heavy-duty commercial vehicles.
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Hollnagel, C. and Wunderlich, C., "Development of the Mercedes-Benz CNG-Engine M447hLAG," SAE Technical Paper 2000-01-3271, 2000, https://doi.org/10.4271/2000-01-3271.Also In
References
- Hollnagel, C. “Natural Gas Engine Mercedes-Benz M447hG with Exhaust Emission Lower than 50% Euro II” SAE Technical Paper Series 952289
- Hollnagel, C. Borges, L. H. Muraro, W. “Combustion Development of the Mercedes-Benz MY1999 CNG-Engine M366LAG” SAE Technical Paper Series 1999-01-3519
- Cartellieri, W. Pfeiffer, U.
- Leiker, M. Christoph, K. Rankl, M. Cartellieri, W. Pfeiffer, U. “The Evaluation of the Antiknocking Property of Gaseous Fuels by Means of the Methane Number and its Practical Application to Gas Engines” 9 th International Congress on Combustion Engines Stockholm - Sweden 1971
- Borges, L.H. Hollnagel, C. Muraro, W. “Desenvolvimento do Motor Mercedes-Benz, a Gás Natural, com Tecnologia de Mistura Pobre” SAE Technical Paper Series 962378 P
- Langeani, M. Borges, L.H. Hollnagel, C. Muraro, W. Fontes, R. “In-Cylinder Flow Analysis of the Mercedes-Benz do Brasil Lean Burn CNG M366LAG Engine” SAE Technical Paper Series 973114
- Gluck, K.H. Lox, E. Schafer-Sindlinger, A. Kreuzer, T. Muniz, R.S. “Catalyst Development for Stoichiometric and Lean Burn Natural Gas Engines” SAE Technical Paper Series 942419 E
- Corbo, P. Gambino, M. Iannaccone, S. Unich, A. “Comparison Between Lean-Burn and Stoichiometric Technologies for CNG Heavy-Duty Engines” SAE Technical Paper Series 950057
- Knorr, H. 5 April 2000 Fribourg, Schweiz