Mercedes-Benz OM660
Overview
ManufacturerMercedes-Benz
Production1998 – 2015
Layout
ConfigurationStraight-three engine
Displacement0.8 L (799 cc)
Cylinder bore65.5 mm (2.58 in)
Piston stroke79 mm (3.11 in)
Cylinder block materialAluminium alloy
Cylinder head materialAluminium alloy
ValvetrainSOHC 2 valves x cyl.
Compression ratio18.5:1
Combustion
TurbochargerSingle-turbo
Fuel systemDirect injection Common rail
Fuel typeDiesel
Cooling systemWater cooled
Output
Power output30–40 kW (41–54 PS; 40–54 hp)
Torque output100–130 N⋅m (74–96 lb⋅ft)

The OM660 is a 0.8-litre turbocharged straight-three Diesel engine produced by Mercedes-Benz for use in Smart vehicles, from 1999 to 2014.

Design

The OM660 features a single-overhead camshaft with two valves per cylinder and an aluminium alloy cylinder block and head. It is turbocharged and features an exhaust gas recirculation system. The OM660 was updated in 2007 receiving increased performance due to a new common rail fuel system with increased boost pressure,[1] and again in 2011 featuring further performance and efficiency improvements.[2]

Models

Engine Power Torque Years
OM660 30 kW (41 PS; 40 hp)
@ 4,200 rpm 		100 N⋅m (74 lb⋅ft)
@ 1,800 rpm 		1999–2006
33 kW (45 PS; 44 hp)
@ 3,800 rpm 		110 N⋅m (81 lb⋅ft)
@ 2,000–2,500 rpm 		2007–2009
40 kW (54 PS; 54 hp)
@ 3,800 rpm 		130 N⋅m (96 lb⋅ft)
@ 2,100 rpm 		2009–2014

OM660 (30 kW version)

OM660 (33 kW version)

OM660 (40 kW version)

References

  1. ^ "Smart Fortwo Passion review | Autocar". www.autocar.co.uk. Retrieved 2018-07-06.
  2. ^ "Smart ForTwo 54bhp". Auto Express. Retrieved 2018-07-06.
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