6. Autonomous traction. Electricity generation

The engine has an energy reserve in the form of fuel. The transformation agent is a heat engine:

• four-stroke engine ;

• Diesel ;

• or gas turbine.

Diesel engines are by far the most widespread. It drives :

• or an electric generator (alternator) powering electric motors driving the axles; this is the electric transmission;

• or one or more torque converters driving the axles; this is the hydraulic transmission. Its current limit is around 2,400 kW ;

• or the axles via a gearbox-type reduction unit; this is the mechanical transmission (rarely used).

The electric drive is the most advanced for high-power...