Engine M281 - SMART 453 Series Introduction Into Service Manual

Brief description
The new smart will be launched with a newly developed
3-cylinder gasoline engine.
The M281 is available in three power variants in model series
453:
• Power-reduced naturally aspirated engine (45 kW)
• Naturally aspirated engine (52 kW)
• Turbocharged engine (turbocharger) (66 kW)
The new M281 gasoline engines are all based on the same
engine platform. The different power variants are obtained
through different software versions and turbocharging.
The different power variants of the M281 all fulfill the EU 6
emissions standard.
M281 (naturally aspirated engine)
Introduction of the New smart fortwo coupé and smart forfour | Model Series 453
– This printout will not be recorded by the update service. Status: 06/2014 –
Charging
A turbocharger with bypass valve (wastegate) is used on the
new smart.
On the turbocharged engine, boost pressure control is
carried out through an electronically controlled boost pres-
sure control flap, which is actuated by the engine control
unit in accordance with a characteristics map and the load
requirement.
Note
B
Further information on the engine control system can
be found in the relevant GF documents in WIS.

Engine M281

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