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    Mercedes-Benz OM646 engine

    Topic: Engineering

     From Handwiki - Reading time: 2 min
    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)
    Block materialCast iron
    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 technologyEGR, 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
    OM644 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" (in en-US). The Motor Report. https://www.themotorreport.com.au/car-article/mercedes-benz-reveals-new-range-of-four-cylinder-diesels-66720.html. 
    2. ↑ "Mercedes C200 CDI estate review | Autocar" (in en). https://www.autocar.co.uk/car-review/mercedes-benz/c-class/first-drives/mercedes-c200-cdi-estate. 
    3. ↑ "Mercedes-Benz OM646, OM647 and OM648 engines" (in en). http://australiancar.reviews/mercedesbenz_OM646_OM647_OM648.php. 



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