Mercedes-Benz M137 engine

The M 137 is a V -12- cylinder petrol engine from Mercedes -Benz. It was established in 1999 in 600 of the 220 ​​series in the S -Class model S and replaced the M 120 from. Successor is offered from 2002 M 275

  • 4.1 M 137 E 58
  • 4.2 M 137 E 63 AMG

Technology

The M 137 is technically the eight-and six-cylinder engines M 113 and M 112 similar. Like this, it has each row of cylinders and a cam shaft for each cylinder two intake and an exhaust valve which are actuated by aluminum roller rocker and two spark plugs, which are driven at different times.

The light-alloy crankcase with cast Silitec cylinder liners (Al -Si alloy ) is made in bedplate design, that is divided at the level of the crankshaft, in the lower part crankshaft bearing bridges are screwed from GGG.

The engine had to be very compact for installation in the 220 ​​series. The W 220 is significantly smaller compared to the predecessor model series 140; the engine room in the W 220 is conceptually matched to the dimensions of the eight- cylinder M 113. The decision, however, offer the W 220 again as in the predecessor and a twelve-cylinder had fallen quite late in the course of development. Therefore, the V12 engine was slightly long-throw ( stroke larger than the cylinder bore ); the cylinder spacing was set at only 90 mm.

The M 137 is not only much smaller, but with 220 kg and 80 kg lighter than the M 120, the M 137 is somewhat simpler than three-valve and with a single camshaft per bank than its predecessor M 120, of a four-valve engine with two camshafts per cylinder bank.

The M 137 has an innovation, however, a cylinder deactivation. At low loads and speeds up to 3000 rpm of the engine when it is running with all twelve pistons, but it "work" only six cylinders of the right bank. The valves of the left bank to be shut down when closed, to avoid pumping losses. The rocker arms are for two parts; they may be decoupled by means of a hydraulically actuated piston. A separate oil pump supplies this hydraulic oil from the engine oil circuit. The cylinder deactivation improved engine efficiency due to smaller throttle losses and higher effective compression, because the cylinders of the right bank are better filled in decoupled valve train the left bank at less throttling valve position and thus the " halved motor " in the six- cylinder operation from the improved filling a higher proportionate achieved torque.

AMG

The slight increase in engine capacity AMG version of the M 137 was used from the fall of 2001 in the S -Class and the CL coupe. A few copies were also built by the G-Class ( G 63 AMG) with V12. The enlarged to 6.3 liter engine delivered 326 kW ( 444 hp). It was replaced in 2002 in all models after a short time from the supercharged 5.5 - liter supercharged V8. Although this had only eight cylinders, surpassing the V12 but in power and torque significantly.

Use

M 137 E 58

M 137 E 63

Specifications

M 137 E 58

  • Cylinder bank angle: 60 °
  • Cylinder spacing: 90 mm
  • Bore x Stroke: 84 mm x 87 mm
  • Displacement: 5786 cm ³
  • Injection: manifold injection
  • Compression ratio: 10.0: 1
  • Power: 270 kW ( 367 hp) at 5500 rpm
  • Torque: 530 Nm at 4250/min

M 137 E 63 AMG

  • Cylinder bank angle: 60 °
  • Bore x Stroke: 84.5 mm x 93 mm
  • Displacement: 6258 cm ³
  • Injection: manifold injection
  • Compression ratio: 10.0:1
  • Power: 326 kW ( 444 hp) at 5500 rpm
  • Torque: 620 Nm at 4400 rpm

Sources / Links

  • Specification M 137
  • Specification M 137 AMG
  • Mercedes- Benz engine
  • Motor model ( V engine )
Mercedes-Benz W220 Mercedes-Benz M112 engine Aluminium Mercedes-Benz W140 Bore (engine)
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