Mercedes-Benz OM656 engine

Mercedes-Benz OM656
Overview
Manufacturer Mercedes-Benz
Production 2017–
Layout
Configuration Straight six engine
Displacement 2.9 L (2,925 cc)
Cylinder bore 82.0 mm
Piston stroke 92.4 mm
Cylinder block alloy Aluminium alloy
Cylinder head alloy Aluminium alloy
Valvetrain DOHC
Compression ratio 15.5:1
Combustion
Turbocharger Single-turbo
Fuel system Common rail injection
Fuel type Diesel
Chronology
Predecessor Mercedes-Benz OM642 engine

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

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 an iron-carbon alloy to reduce friction.[5]

Models

Engine Power Torque Years
OM656 D29 R SCR 210 kW (282 hp)
@ 3,400–4,600 rpm		 600 N⋅m (443 lb⋅ft)
@ 1,200–3,200 rpm		 2018–
OM656 D29 SCR 250 kW (335 hp)
@ 3,600–4,400 rpm		 700 N⋅m (516 lb⋅ft)
@ 1,200–3,200 rpm

OM656 D29 R SCR

OM656 D29 SCR

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. 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. ↑ "Mercedes-Benz E 400 d 4Matic All-Terrain Confirmed to Get OM 656 Engine". www.autoevolution.com. Retrieved 2018-07-03.
  7. 1 2 "Mercedes CLS pre-production (2017) ride review". CAR Magazine. Retrieved 2018-07-03.
  8. ↑ "Mercedes to Show Off Six Appeal at Shanghai Show". WardsAuto. 2017-04-18. Retrieved 2018-07-03.
  9. ↑ 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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