Mercedes-Benz OM646 engine

Mercedes-Benz OM646
Overview
ManufacturerMercedes-Benz
Production2002–2010
Layout
ConfigurationInline-four engine
Displacement2.1 L (2,148 cc)
Cylinder bore88 mm (3.46 in)
Piston stroke88.3 mm (3.48 in)
Cylinder block materialCast iron
Cylinder head materialAluminium alloy
ValvetrainDOHC
Compression ratio17.5:1 (DE22 LA EVO), 18.0:1
Combustion
TurbochargerSingle
Fuel systemCommon rail
Fuel typeDiesel
Cooling systemWater cooled
Output
Power output65–125 kW (88–170 PS; 87–168 hp)
Torque output220–400 N⋅m (162–295 lb⋅ft)
Emissions
Emissions target standardEuro 4
Emissions control systemsEGR, DPF
Chronology
PredecessorMercedes-Benz OM611 engine
SuccessorMercedes-Benz OM651 engine

The OM646 is a turbocharged inline-four engine produced between 2002 and 2010 by Mercedes-Benz.

Design

The OM646 engine is sold under the 200 CDI and 220 CDI designation and features an electric fuel pump, exhaust gas recirculation, particulate filters,[1] and Euro 4 emission standard compliance (from 2003).[2] In 2006, the engine was updated under the EVO name and replaced the OM647 engine. It features a reduced compression ratio of 17.5:1, a new turbocharger, and ceramic glow plugs for improved engine starts.[3]

Models

Engine Power Torque Years
OM646
DE22 LA R
65 kW (88 PS; 87 hp) @ 3,800 rpm 220 N⋅m (162 lb⋅ft) @ 1,400–2,500 rpm 2003–2010
70 kW (95 PS; 94 hp) @ 3,800 rpm 250 N⋅m (184 lb⋅ft) @ 1,400–2,600 rpm 2006–2010
80 kW (109 PS; 107 hp) @ 3,800 rpm 270 N⋅m (199 lb⋅ft) @ 1,600–2,600 rpm 2003–2010
85 kW (116 PS; 114 hp) @ 3,800 rpm 290 N⋅m (214 lb⋅ft) @ 1,600–2,600 rpm 2006–2010
OM646 DE22 LA R 90 kW (122 PS; 121 hp) @ 4,200 rpm 270 N⋅m (199 lb⋅ft) @ 1,400–2,800 rpm 2003–2010
OM646
DE22 LA
65 kW (88 PS; 87 hp) @ 3,800 rpm 220 N⋅m (162 lb⋅ft) @ 1,600–2,600 rpm 2006–2009
80 kW (109 PS; 107 hp) @ 3,800 rpm 280 N⋅m (207 lb⋅ft) @ 1,600–2,400 rpm
95 kW (129 PS; 127 hp) @ 3,800 rpm 305 N⋅m (225 lb⋅ft) @ 1,200–2,400 rpm
105 kW (143 PS; 141 hp) @ 4,200 rpm 340 N⋅m (251 lb⋅ft) @ 2,000 rpm 2003–2004
OM646 DE22 LA 110 kW (150 PS; 148 hp) @ 3,800–4,200 rpm 330 N⋅m (243 lb⋅ft) @ 1,200–2,400 rpm 2003–2010
OM646
DE22 LA EVO R
100 kW (136 PS; 134 hp) @ 3,800 rpm 270 N⋅m (199 lb⋅ft) @ 1,600–3,000 rpm 2007–2009
340 N⋅m (251 lb⋅ft) @ 2,000 rpm 2006–2009
OM646
DE22 LA EVO
125 kW (170 PS; 168 hp) @ 3,800 rpm 400 N⋅m (295 lb⋅ft) @ 2,000 rpm

OM646 DE22 LA R

OM646 DE22 LA

OM646 DE 22 LA EVO R

OM646 DE 22 LA EVO

References

  1. ^ Klose, Steane (2008-04-11). "Mercedes Benz reveals new range of four cylinder diesels". The Motor Report. Retrieved 2018-07-06.
  2. ^ "Mercedes C200 CDI estate review | Autocar". www.autocar.co.uk. Retrieved 2018-07-06.
  3. ^ "Mercedes-Benz OM646, OM647 and OM648 engines". australiancar.reviews. Retrieved 2018-07-06.

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