In 2011, OM471 engines made their debut. The V-shaped engines were replaced by inline, 6-cylinder engines with a 12.8-liter working volume. They were given an asymmetric turbocharging system, an innovative X-Pulse injection system, and compliance with Euro 6 environmental standards. Following revision, the engineers were able to improve traction, increase torque to 2600 Nm (for a 530 horsepower engine), and cut fuel consumption by an additional 3%. features of automobiles.
The newest heavy-duty trucks, such as Antos, Arocs, and Actros vehicles, started to have motors installed. Over 250,000 of these engines have been sold worldwide to date.
The second generation of the X-Pulse direct fuel injection system is an essential part of the new generation of OM 471 engines. The maximum injection pressure was raised to 2,700 bar by raising the fuel line’s maximum pressure from 900 to 1,160 bar.
Specifications
| Manufacturer | Mercedes Benz |
| Also called | OM 471 |
| Production years | 2011 |
| Cylinder block alloy | cast iron |
| Fuel system | direct injection |
| Configuration | inline |
| Number of cylinders | 6 |
| Piston stroke, mm | 156 |
| Cylinder bore, mm | 132 |
| Compression ratio | 18.3:1 |
| Displacement, cc | 12800 |
| Power output, hp | 422-530/1800 |
| Torque output, Nm / rpm | 2100-2600/1100 |
| Fuel type | diesel |
| Euro standards | Euro 6 |
| Weight, kg | 1045 (dry) |
| Firing order | 1-5-3-6-2-4 |
The spray-equipped fuel injector has eight holes instead of just seven. The compression ratio was raised from 17.3:1 to 18.3:1, the exhaust gas recirculation (EGR) ratio was decreased, and the piston’s combustion chamber geometry was altered under the modified spray. The most economical mode has moved to the lower engine speed range, according to the updated torque curve. Asymmetric injection is another new feature. The OM 471’s six cylinders’ injectors receive the same quantity of fuel when it is operating normally.
Explanation of OM457LA marking
| OM | Heavy Fuel Oil (Diesel) ICE |
| 471 | Engine type: 6-cylinder in-line. |