What is the working principle of the internal combustion locomotive?

Fuel combustion in the cylinder, the resulting high-temperature and high-pressure gas expansion in the cylinder, pushing the piston reciprocating motion, connecting rod driven crankshaft rotation external work, the thermal energy of the fuel is converted into mechanical work.

The power from the diesel engine is transmitted to the transmission device, through the control and regulation of the diesel engine, transmission device, the output speed and torque to adapt to the operating conditions of the locomotive is sent to each axle gear box to drive the dynamic wheel, the dynamic wheel generated by the periphery of the traction force to the frame, the frame end of the hook into the hook traction to drag or push the vehicle.

Expanded Information:

Auxiliary main equipment includes:

Fuel System -Equipment and piping system to ensure the supply of fuel to the diesel engine; cooling system -Cooling equipment and piping system to ensure that the diesel engine and the hydraulic transmission can work properly; oil piping system - - to the diesel engine normal lubrication equipment and piping system;

Air filter - filtering air dust and other spoils of the device; compressed air system - supply of air brakes, sand box of the train, air horn and other equipment compressed air system; auxiliary electrical equipment - battery packs, DC auxiliary generators, diesel starter motors and so on.