Mercedes-Benz M 137
| Mercedes Benz | |
|---|---|
|
|
| M 137 | |
| Manufacturer: | Mercedes Benz |
| Production period: | 1999-2002 |
| Design: | V, twelve-cylinder |
| Engines: | 5.8 liters (5786 cm³) 6.3 liters (6258 cm³) |
| Previous model: | M 120 |
| Successor: | M 275 |
| Similar models: |
M 112 M 113 |
The M 137 is a V -12- cylinders - gasoline engine from Mercedes-Benz . It was introduced in 1999 in the S-Class model S 600 of the 220 series and replaced the M 120 . The successor is the M 275, available from 2002 . The M 137 was manufactured in the Mercedes-Benz engine plant in Berlin-Marienfelde.
technology
The M 137 is technically similar to the eight and six-cylinder engines M 113 and M 112 . Like this one, it has one camshaft for each cylinder row and two inlet and one outlet valves for each cylinder, which are operated by aluminum roller rocker arms, and two spark plugs that are triggered with a delay.
The light metal crankcase with cast-in Silitec cylinder liners ( Al - Si alloy) is designed in bedplate construction, i. H. Split at the level of the crankshaft, with crankshaft bearing brackets made of GGG screwed into the lower part .
The engine had to be very compact for installation in the 220 series. The W 220 is significantly smaller than its predecessor, the W 140 ; the engine compartment in the W 220 is designed to match the dimensions of the eight-cylinder M 113. The decision to offer a twelve-cylinder engine in the W 220 - as in the predecessor - was made late in the course of development. The M 137 was designed with a slightly long stroke ( piston stroke larger than cylinder bore ) and the cylinder distance was set at just 90 mm to keep the engine compact.
The M 137 is not only much smaller, but at 220 kg also 80 kg lighter than the M 120. The M 137 is a three-valve engine and with only one camshaft per bank, a somewhat simpler design than its predecessor M 120, which has four valves per combustion chamber and has two camshafts per cylinder bank.
The M 137 received cylinder deactivation as an innovation. At low loads and up to a speed of 3000 rpm, the engine moves all twelve pistons, but only the six cylinders on the right bank work. The valves in the left bank are shut down in the closed state to avoid pumping losses. The rocker arms are divided into two parts; they can be decoupled by a hydraulically operated piston. A separate oil pump supplies the hydraulic system required for this with oil from the engine oil circuit. The cylinder deactivation improves the efficiency of the engine through smaller throttling losses and higher effective compression, since the cylinders of the right bank are better filled with decoupled valve train of the left bank with less throttling flap position and thus the "halved engine" in six-cylinder operation a higher proportion from the improved filling Torque achieved.
AMG
The AMG version of the M 137, enlarged to around 6.3 liters, was used in the S-Class and CL-Coupé from autumn 2001. Only a few examples of the AMG version of the G-Class (G 63 AMG) were made with this V12 engine. The unit has an output of 326 kW (444 hp) and develops a maximum torque of 620 Nm. It was replaced in all models in 2002 by the supercharged 5.5-liter supercharged V8 . Although this only had eight cylinders, it clearly surpassed the V12 in terms of power and torque.
commitment
M 137 E 58 *
| Sales description | model series | Construction period |
|---|---|---|
| Displacement: 5786 cm³, output: 270 kW (367 hp) at 5500 rpm, torque: 530 Nm at 4250 rpm | ||
| CL 600 | C 215 | 1999-2002 |
| S 600 L | W / V 220 | 1999-2002 |
M 137 E 63 *
| Sales description | model series | Construction period |
|---|---|---|
| Displacement: 6258 cm³, power: 326 kW (444 hp) at 5500 / min, torque: 620 Nm at 4400 / min | ||
| CL 65 AMG | C 215 | 2001-2002 |
| S 65 AMG | W / V 220 | 2001-2002 |
| G 65 AMG | W 463 | 2002-2003 |
* Engine designation is encoded as follows: M = engine (Otto), series = 3 digits, E = manifold injection, displacement = deciliters (rounded)
Technical specifications
M 137 E 58
- Cylinder bank angle : 60 °
- Cylinder distance: 90 mm
- Bore × stroke: 84 mm × 87 mm
- Displacement: 5786 cm³
- Injection: manifold injection
- Compression: 10.0: 1
- Output: 270 kW (367 hp) at 5500 rpm
- Maximum torque: 530 Nm at 4250 rpm
M 137 E 65 AMG
- Cylinder bank angle : 60 °
- Bore × stroke: 84.5 mm × 93 mm
- Displacement: 6258 cm³
- Injection: manifold injection
- Compression: 10.0: 1
- Output: 326 kW (444 hp) at 5500 rpm
- Maximum torque: 620 Nm at 4400 rpm