Brief Description - Mercedes-Benz OM 651 Service Manual

Brief description

Engine model series 651
The new generation of the 4-cylinder diesel engine
651 equipped with the second-generation Common
Rail Direct Injection (CDI) system from Delphi will be
launched on the market as of October 2008.
Engine 651 has a rated output of 150 kW with a
displacement of 2,143 cm
5.4 liters of diesel fuel per 100 kilometers. Despite
this high output and an engine torque of 500 Nm,
emissions of CO
2
tion, the engine meets the future Euro 5 standard.
A central feature of the new engine is its dual stage
turbocharging system. The system combines a small
high-pressure turbocharger with a large low-pressure
turbocharger. Engine 651 also features two
Lanchester balance shafts to make the engine run
more smoothly.
In order to meet the new legal requirements of the
Euro NCAP crash tests with respect to improved
pedestrian protection, the gear drive has been located
on the output side together with the chain drive. The
increased space between the engine and engine hood
reduces the risk of injury for pedestrians.
6
Introduction of New Generation of 4-Cylinder Inline Engines, OM 651
q
3
and a consumption of just
have been further reduced. In addi-
– This printout will not be recorded by the update service. Status: 09 / 2008 –
Engine 138
2.6 l displacement and 33 kW output. Installed in the
Mercedes-Benz 260 D, the world's first diesel passenger
car, in 1936.
Engine 651
2.2 l displacement and 150 kW output. Installed in the
C-Class as of October 2008.
i Note
A detailed description of the new CDI system can
be found in the System Description for engine 651.
Order number: 6516 1363 02