Mercedes-Benz OM656 engine

Last updated
Mercedes-Benz OM656
Mercedes OM656 engine.png
Overview
Manufacturer Mercedes-Benz
Production2017–present
Layout
Configuration Straight-six engine
Displacement 2.9 L (2,927.8 cc)
Cylinder bore 82 mm (3.23 in)
Piston stroke 92.4 mm (3.64 in)
Cylinder block material Aluminium alloy
Cylinder head materialAluminium alloy
Valvetrain DOHC 4 valves x cyl. with VVT
Compression ratio 15.5:1
Combustion
Supercharger BorgWarner eBooster electrically driven compressor
Turbocharger Single-turbo
Fuel system Common rail direct injection
Fuel type Diesel
Cooling system Water cooled
Output
Power output 210–250 kW (282–335 hp)
Torque output 600–700 N⋅m (443–516 lb⋅ft)
Chronology
Predecessor

The OM656 is a turbocharged diesel engine produced by Mercedes-Benz since 2017. It was first introduced in the facelift W222 S-Class. [1]

Contents

Design

The OM656 is based on a modular design that is shared with other 4-cylinder and 6-cylinder, petrol and diesel engines. [2] It is the replacement to the previous V6, [3] in order to maintain the cost of production between different engines. The OM656 has dual overhead camshafts with variable valve timing, and uses AdBlue injection and exhaust gas recirculation to reduce emissions. [4] The cylinder walls are coated with arc sprayed steel whose increased porosity aids oil film strength to reduce friction. [5] [6]

Models

EnginePowerTorqueYears
OM656 D29T R SCR210 kW (286 PS; 282 hp)
at 3,400–4,600 rpm		600 N⋅m (443 lb⋅ft)
at 1,200–3,200 rpm		2017– [7]
OM656 D29T SCR250 kW (340 PS; 335 hp)
at 3,600–4,400 rpm		700 N⋅m (516 lb⋅ft)
at 1,200–3,200 rpm

OM656 D29T R SCR

OM656 D29T SCR

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References

  1. ↑ Publishing, Last Gear. "Facelifted 2017 Mercedes-Benz S-Class to Debut New 3.0L Straight-Six Engines, 4.0L V8 Biturbo". Drive Mag. Retrieved 2018-07-03.
  2. ↑ "New Modular Engine Family from Mercedes-Benz is Cleaner and More Powerful – Drive Safe and Fast". www.dsf.my. 30 October 2016. Retrieved 2018-07-03.
  3. ↑ "Hallelujah: Mercedes is bringing back the straight-six". Autoweek. Retrieved 2018-07-03.
  4. ↑ "Mercedes rolls out new generation V8, inline 4 and 6 cylinder engines - MercedesBlog". MercedesBlog. 2016-10-29. Retrieved 2018-07-03.
  5. ↑ Orlove, Raphael. "The Inline-Six Engine Is Back For Mercedes-Benz". Jalopnik. Retrieved 2018-07-03.
  6. ↑ "NANOSLIDE®: Mirror-smooth surface for less friction". www.group-media.mercedes-benz.com. Retrieved 2022-08-29.
  7. ↑ New six-cylinder diesel engine (OM 656): Majestic long-distance athlete
  8. ↑ "Mercedes-Benz E 400 d 4Matic All-Terrain Confirmed to Get OM 656 Engine". www.autoevolution.com. Retrieved 2018-07-03.
  9. 1 2 "Mercedes CLS pre-production (2017) ride review". CAR Magazine. Retrieved 2018-07-03.
  10. ↑ Panait, Mircea (22 December 2018). "G 350 d Introduces OM 656 Turbo Diesel To 2019 Mercedes-Benz G-Class". autoevolution. Retrieved 24 December 2018.
  11. ↑ "Mercedes to Show Off Six Appeal at Shanghai Show". WardsAuto. 2017-04-18. Retrieved 2018-07-03.
  12. ↑ Panait, Mircea (2018-05-02). "Mercedes-Benz E 400 d 4Matic All-Terrain Confirmed to Get OM 656 Engine". autoevolution. Retrieved 2018-07-03.
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