Diesel 4-cylinder engines with a 4.75-liter displacement and a reinforced cast iron cylinder block are referred to as MMZ D-240 engines. The atmospheric power plant is distinguished by its straightforward design and enhanced dependability.
Repairing the motor is a simple process that can be done in the field. The engine is given the necessary thrust and enough power because the power plant is diesel and the fuel supply is injected. The engine’s inseparable working chamber was the practical solution. Additionally, the fuel injection is doubled, with the fuel distributed as a film over the cylinder and piston and the working fluid vapor forming in the volume.
Gray cast iron with high strength aids in preventing thermal deformations in the engine block. The MMZ D-240 engine’s mass of 430 kg was justified by the material, which made the motor heavy because similar mechanisms do not have diseases.
Specifications
| Cylinder block alloy | cast iron |
| Fuel system | direct injection |
| Configuration | inline |
| Displacement, liters | 4.75 |
| Power output, hp | 80 |
| Number of cylinders | 4 |
| Valves per cylinder | 2 |
| Piston stroke, mm | 125 |
| Cylinder bore, mm | 110 |
| Compression ratio | 16 |
| Fuel type | diesel |
| Fuel consumption | not more than 238 liters per hour |
Cooling system of the D-240 engine
The MTZ-80 and MTZ-82 tractors use the motor because the D-240 has closed-type liquid cooling installed. Since contact with the environment only happens through the valve for a brief moment, the closed type of cooling is a very daring choice. The liquid must be at the ideal temperature, which is between 80 and 97 degrees, to prevent the engine from overheating. A thermometer is used to control this indicator, and the temperature can be manually adjusted.