Mercedes-AMG M139 Four-Cylinder Turbo Engine Assembly. This engine will be available for 2020 Mercedes AMG A45, CLA 45 AMG and Mercedes-AMG GLB 45. Subscribe.
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Mercedes-AMG M 139 2.0 litre turbocharged four-cylinder engine technical data at a glance:
Displacement: 1991 cc
Bore x stroke: 83.0 x 92.0 mm
Output: 310 kW (421 hp) at 6750 rpm (S-model), 285 kW (387 hp) at 6500 rpm (basic version)
Peak torque: 500 Nm at 5000-5250 rpm (S-model), 480 Nm at 4750-5000 rpm (basic version)
Max. engine speed: 7200 rpm
Compression ratio: 9.0:1
Turbocharging: One twinscroll turbocharger with roller-bearing compressor and turbine wheels
Max. charge pressure: 2.1 bar (S-model), 1.9 bar (basic version)
Mixture formation: Combined direct and manifold injection.
1.) Third-generation multiple direct injection. Fast and precise piezo injectors spray the fuel into the combustion chambers at high pressure
2.) Additional intake manifold injection with solenoid valves
Cylinder head: Two overhead camshafts, 16 valves, adjustable intake and exhaust camshafts, CAMTRONIC valve timing adjustment for the exhaust camshaft
Max. air mass throughput: 1,200 kg/h (S-model), 1,100 kg/h (basic version)
Engine weight (wet): 160.5 kg
The four-cylinder available in two output versions will ensure agile performance for the compact models of Mercedes-AMG: with 310 kW (421 hp) as the S-model and with 285 kW (387 hp) in the basic version. This product policy logic has already proved successful in the V8-powered AMG Performance models, and more closely meets customer wishes.
Apart from its performance figures, the new engine impresses with its immediate response. To this end the torque curve was carefully balanced ("torque shaping"): The peak torque of 500 newton metres (480 newton metres for the basic version) is available in a range of 5000-5250 rpm (4750-5000 rpm in the basic version). With this configuration, the AMG engineers have achieved a power delivery similar to that of a naturally aspirated engine for an even more emotive driving experience. The engine developers were also able to realise a dynamically increasing torque curve in the lower engine speed range, thereby improving agility. The increasing torque at higher rpm makes the engine more free-revving. Moreover, the high maximum engine speed (up to 7200 rpm) confirms the M 139 as a sports engine.
"We already set the benchmark in the segment with the preceding engine. This fundamentally new four-cylinder presented us with the challenge of doing even better. And we succeeded with a number of sometimes revolutionary solutions. With the M 139, we have once again impressively demonstrated the engine expertise of Mercedes-AMG. Not only is the output per litre unrivalled for a turbocharged engine, the high level of efficiency also demonstrates that the internal combustion engine still has further potential," says Tobias Moers, Chairman of Mercedes-AMG GmbH.
The new engine is entirely assembled by hand. On the first floor of the AMG engine manufactory in Affalterbach, a completely newly designed production line was installed in which Mercedes-AMG has brought the "One Man, One Engine" principle to a new level together with Industry 4.0 methods that incorporate the latest findings in ergonomics, materials handling, quality assurance, sustainability and efficiency. On the road to implementing Industry 4.0, AMG's hand assembly operation likewise follows the vision of "smart production". This excels with maximum flexibility, and is transparent and highly efficient. It safeguards and improves the quality of the engines and production processes using innovative and digital technologies.
"We have completely revised the principle of "One Man, One Engine" for assembly of the M 139. The result is an ultra-modern production process that places the focus on people. To achieve this, we created the ideal working conditions in a bright, precisely organised and clean environment for our employees. This provides the best basis for continuing to ensure our high quality level even as the technology becomes more complex," says Emmerich Schiller, COO and member of the Board of Management at Mercedes-AMG GmbH.
The new engine excels with numerous intelligent design features. Compared to the likewise transversely installed M 260 four-cylinder in the "35" models or the preceding M 133 engine, the new Mercedes-AMG M 139 is rotated around its vertical axis by 180 degrees. This means that the turbocharger and the exhaust manifold are now positioned at the rear, on the side of the firewall when viewed from behind. The intake system is therefore positioned at the front. This configuration allows the flattest possible and aerodynamically advantageous front section design. Furthermore, the new arrangement allows much improved air ducting with shorter distances and fewer diversions - both on the intake and exhaust side.