Mercedes-Benz M112 engine
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The Mercedes-Benz M112 engine is a V6 automobile piston engine family used in the 2000s. Introduced in 1998, it was the first V6 engine ever built by Mercedes. A short time later, the related M113 V8 was introduced.
All are built in Bad Cannstatt, Germany except the supercharged AMG C32 AMG, which is assembled in Affalterbach, Germany.
All M112 engines have aluminum engine blocks with a 90° vee angle with silicon/aluminum lined cylinders. The aluminum SOHC cylinder heads have 3 valves per cylinder. All use SFI fuel injection with two spark plugs per cylinder. All have forged steel connecting rods, a one-piece cast camshaft, and a magnesium intake manifold. To deal with the inherit vibration problems of a 90 degree V6, a balancer shaft was installed in the engine block between the cylinder banks. This essentially eliminated first and second order vibration problems.
4 valves per cylinder were added in 2004 for the E35 variant used in the new SLK350. This engine will supplant the remaining E32s during the course of 2005.
E240
The E240 is a 2.6 L (2597 cc) version. Bore is 89.9 mm and stroke is 68.2 mm. Output is 170 hp ECE (125 kW) at 5500 rpm with 240 Nm (177 ft.lbf) of torque at 4500 rpm.
Applications:
- 2001-2004 C240
E320
The E320 is a 3.2 L (3199 cc) version. Bore remains at 89.9 mm but the engine is stroked to 84 mm. Output is 218 hp ECE (160 kW) or 224 hp ECE (165 kW) at 5700 rpm with 315 Nm (232 ft.lbf) of torque at 3000-4800 rpm. It has fracture-split forged steel connecting rods.
Applications:
E32 AMG
The E32 AMG is a special supercharged and intercooled version of the 3.2 L (3199 cc) E32. Output is 354 hp ECE (260 kW) at 6100 rpm with 332 ft.lbf (450 Nm) of torque at 3000-4600 rpm.
Applications:
E350
The E350 is a 3.5 L (3498 cc) version. Bore is now at 92.6 mm and stroke is up as well at 86 mm. Output is 268 hp (199 kW) at 6000 rpm with 258 ft·lbf (349 N·m) of torque at 3500 rpm. It has 4 valves per cylinder and is a DOHC design. VVT is adopted for the first time, but the twin sparkplug system was replaced by a regular single sparkplug per cylinder.
Applications:
- 2004 SLK350
E37
The E37 is a 3.7 L (3724 cc) version. It retains the 84 mm stroke of the E320 but is bored to 96.8 mm. Output is 235 hp ECE (173 kW) to 245 ECE (180 kW) at 5750 rpm with 254 ft.lbf (344 Nm) of torque at 3000-4500 rpm.
Applications:
- 2003-2004 Mercedes ML350
See also
External link
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