Fully operational truck diesel engine model in a mobile frame. This training engine is specially designed to demonstrate Pressure Limiting Drivers (PLD) 4-cylinder diesel injection system and operational structure. The educational training engine is based on OEM components with functional engine control system. This fully functional model includes a PLD fuel supply system, instrument cluster, cooling system, power supply, and exhaust system, providing a realistic and hands-on educational experience. Also allows to study components and operation modes of the engine control system, perform various measurements, tests and other diagnostic procedures.