How to maintain the diesel engine of the thermoplastic road marking kettle under high temperature weather conditions

The high temperature problem of diesel engines in thermoplastic road marking kettles is a common and important phenomenon that needs to be taken seriously. High engine temperature can manifest as lubrication failure, increased component wear, serious malfunctions such as cylinder pulling and cylinder gasket burnout. If not dealt with in a timely manner, it may cause damage to the engine or even lead to accidents. However, there are multiple reasons that can cause high temperatures in diesel engines.

The reason for high temperature in diesel engines is:

1. Insufficient antifreeze: During operation, the internal temperature of the diesel engine is extremely high. If the coolant content is insufficient or the quality is poor, it will not be able to effectively cool down the engine, resulting in high engine temperature. In addition, high temperatures in diesel engines may also be caused by malfunctions in the thermostat, cooling fan, circulating water pump, and other factors. In these cases, the driver needs to immediately stop the vehicle, let it idle for a period of time, and wait for the temperature to decrease on its own.

2. Fan belt looseness or malfunction problem: Don't underestimate the tightness of the fan belt as a minor issue. Fan belt looseness or tightness can have an impact on the engine. In mild cases, it may require replacement of the fan belt, increasing maintenance costs. In severe cases, diesel generator overheating may occur, exacerbating engine wear and tear.

3. Fan not turning: There may be two reasons for the fan not turning. On the one hand, the fan itself may be damaged, such as broken fan blades or broken fan belts; On the other hand, it may be a control circuit malfunction that cannot provide a signal for the electronic fan to operate.

4. Poor heat dissipation of radiator: The impact of heat dissipation capacity on water temperature: Too much scale deposits in the radiator, cylinder, and cylinder head water jacket, which reduces the heat dissipation function of the cooling water. Moreover, excessive accumulation of scale inside the water jacket can cause a reduction in the cross-sectional area of the circulation pipeline, resulting in a decrease in the amount of water participating in the cooling cycle and thus reducing the ability to absorb heat from the cylinder block and cylinder head, leading to excessively high cooling water temperature. The radiator capacity is too small and the heat dissipation area is too small, which affects the heat dissipation effect and causes high water temperature.

5. Thermostat malfunction problem: When the thermostat is damaged or stuck, the engine only has small circulation, and the water tank does not play a role in heat dissipation, resulting in low heat dissipation intensity and high engine temperature.

The solution to high temperature in diesel engines is:

1. Immediately replenish antifreeze;

2. Tighten or replace the fan belt directly;

3. Repair or replace the water tank;

4. Remove debris from the surface of the radiator;

5. Repair or replace the thermostat. A diesel engine is an internal combustion engine that uses diesel as fuel and is a compression ignition engine. When a diesel engine is in operation, the air drawn into the cylinder is compressed to a high degree due to the movement of the piston, reaching a high temperature of 500 to 700 degrees Celsius. Then, the fuel is sprayed into the high-temperature air in a mist form, mixed with the high-temperature air to form a combustible mixture, which automatically ignites and burns. The energy released during combustion acts on the top surface of the piston, pushing it and converting it into rotating mechanical work through the connecting rod and crankshaft.