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

Mercedes-Benz OM656
Overview
ManufacturerMercedes-Benz
Production2017–
Layout
ConfigurationStraight six engine
Displacement2.9 L (2,925 cc)
Cylinder bore82 mm (3.23 in)
Piston stroke92.4 mm (3.64 in)
Block materialAluminium alloy
Head materialAluminium alloy
ValvetrainDOHC 4 valves x cyl. with VVT
Compression ratio15.5:1
Combustion
SuperchargerBorgWarner's eBooster® electrically driven compressor
TurbochargerSingle-turbo
Fuel systemCommon rail Direct injection
Fuel typeDiesel
Cooling systemWater cooled
Output
Power output210–250 kW (282–335 hp)
Torque output600–700 N⋅m (443–516 lb⋅ft)
Chronology
PredecessorMercedes-Benz OM642

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


Engine Power Torque Years
OM656 D29T R SCR 210 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 SCR 250 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



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. "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. "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.



На других языках

- [en] Mercedes-Benz OM656 engine

[it] Mercedes-Benz OM656

La sigla Mercedes-Benz OM656 indica un motore diesel prodotto a partire dal 2017 dalla Casa tedesca Mercedes-Benz.

[ru] Mercedes-Benz OM656 (двигатель)

Mercedes-Benz OM656 — турбированный рядный шестицилиндровый дизельный двигатель производимый Mercedes-Benz с 2017 года. Был впервые представлен на рестайлинге W222 S-Class.


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