An internal-combustion engine (1), in particular for a vehicle, is provided with a plurality of cylinders (2) and a cylinder head (3) which defines, for each cylinder (2), at least one exhaust duct (16) and at least one intake duct (12); the engine is furt...

A diagnostic system for an electric heater (10) connected with an air-intake manifold (8) of a diesel engine, in which at least one remote-controlled (6) switch (17) is disposed between the vehicle battery (15) and the electric heater (10). The systems pro...