Mercedes-Benz M278 engine

Common card · No. 201801

The Mercedes-Benz M278 is a family of direct injected, Bi-turbocharged, V8 gasoline automotive piston engines. The M278 is derived from the company's previous M273 V8 engine, sharing its bore pitch, aluminium engine block, and Silitec aluminium/silicon low-friction cylinder liners. ( There is contrasting information that after engine # 2789xx 30 266191 they changed over to "cast-in" iron liners.) In contrast to the port-injected M273, the M278 features gasoline direct injection, with piezo-electrically actuated fuel injectors for more precise fuel delivery, and multi-spark ignition, which enables the spark plugs to be fired multiple times over the combustion sequence for more efficient combustion. Other changes relative to the M273 include an increased adjustment range for the variable valve timing system, a new timing chain arrangement, and new engine accessories (such as the oil pump, water pump, fuel pump, and alternator) which reduce parasitic loads. Many of these new features are shared...

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