Mercedes-Benz OM646 engine

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Mercedes-Benz OM646
OM646.JPG
Overview
Manufacturer Mercedes-Benz
Production2002–2010
Layout
Configuration Inline-four engine
Displacement 2.1 L (2,148 cc)
Cylinder bore 88 mm (3.46 in)
Piston stroke 88.3 mm (3.48 in)
Cylinder block material Cast iron
Cylinder head material Aluminium alloy
Valvetrain DOHC
Compression ratio 17.5:1 (DE22 LA EVO), 18.0:1
Combustion
Turbocharger Single
Fuel system Common rail
Fuel type Diesel
Cooling system Water cooled
Output
Power output 65–125 kW (88–170 PS; 87–168 hp)
Torque output 220–400 N⋅m (162–295 lb⋅ft)
Emissions
Emissions target standard Euro 4
Emissions control systems EGR, DPF
Chronology
Predecessor Mercedes-Benz OM611 engine
Successor Mercedes-Benz OM651 engine

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

Contents

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

EnginePowerTorqueYears
OM646
DE22 LA R		65 kW (88 PS; 87 hp) @ 3,800 rpm220 N⋅m (162 lb⋅ft) @ 1,400–2,500 rpm2003–2010
70 kW (95 PS; 94 hp) @ 3,800 rpm250 N⋅m (184 lb⋅ft) @ 1,400–2,600 rpm2006–2010
80 kW (109 PS; 107 hp) @ 3,800 rpm270 N⋅m (199 lb⋅ft) @ 1,600–2,600 rpm2003–2010
85 kW (116 PS; 114 hp) @ 3,800 rpm290 N⋅m (214 lb⋅ft) @ 1,600–2,600 rpm2006–2010
OM646 DE22 LA R90 kW (122 PS; 121 hp) @ 4,200 rpm270 N⋅m (199 lb⋅ft) @ 1,400–2,800 rpm2003–2010
OM646
DE22 LA		65 kW (88 PS; 87 hp) @ 3,800 rpm220 N⋅m (162 lb⋅ft) @ 1,600–2,600 rpm2006–2009
80 kW (109 PS; 107 hp) @ 3,800 rpm280 N⋅m (207 lb⋅ft) @ 1,600–2,400 rpm
95 kW (129 PS; 127 hp) @ 3,800 rpm305 N⋅m (225 lb⋅ft) @ 1,200–2,400 rpm
105 kW (143 PS; 141 hp) @ 4,200 rpm340 N⋅m (251 lb⋅ft) @ 2,000 rpm2003–2004
OM646 DE22 LA110 kW (150 PS; 148 hp) @ 3,800–4,200 rpm330 N⋅m (243 lb⋅ft) @ 1,200–2,400 rpm2003–2010
OM646
DE22 LA EVO R		100 kW (136 PS; 134 hp) @ 3,800 rpm270 N⋅m (199 lb⋅ft) @ 1,600–3,000 rpm2007–2009
340 N⋅m (251 lb⋅ft) @ 2,000 rpm2006–2009
OM646
DE22 LA EVO		125 kW (170 PS; 168 hp) @ 3,800 rpm400 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

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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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