Browse Publications Technical Papers 2000-01-3271
2000-12-01

Development of the Mercedes-Benz CNG-Engine M447hLAG 2000-01-3271

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.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

Combustion Development of the Mercedes-Benz MY1999 CNG-Engine M366LAG

1999-01-3519

View Details

TECHNICAL PAPER

Development of a Mercedes-Benz Natural Gas Engine M 366 LAG, with a Lean Burn Combustion System

962378

View Details

TECHNICAL PAPER

Improving Combustion and Emission Characteristics in Heavy-Duty Natural-Gas Engine by Using Pistons Enhancing Turbulence

2018-01-1685

View Details

X