How should we maintain the excavator engine under low temperature.
When the weather gets cold, the excavator will have trouble in cold start, idle speed jitter after cold start, poor acceleration after cold start and other fault phenomena. The fault phenomenon will not disappear until the water temperature of the vehicle rises. Experts believe that this is mainly due to excessive carbon deposition inside the engine.
There are two reasons for carbon deposition. There are many reasons for carbon deposition inside the engine. For most car owners, the main reasons for carbon deposition are fuel quality and urban road conditions.
In the process of storage and transportation, gasoline with uneven fuel quality is easy to oxidize with air and generate colloidal substances, or the content of colloid in gasoline itself is very high. These colloids enter the combustion chamber with gasoline through the vehicle's fuel supply system, and then burn together with gasoline, which will make the fuel injector in the fuel supply system, the combustion chamber of the engine, piston ring groove, spark plug, back of inlet valve There is a lot of carbon deposition in the air inlet and other parts.
Congested urban road conditions drive in the city, and the vehicles are always in the state of stop and go. The engine cannot run at high speed, and the fuel or lubricating oil jumping into the combustion chamber cannot burn 100%. Some unburned oil forms colloid under the action of high temperature and oxygen, adheres to the surface of parts inside the engine, and then forms carbon deposition under the action of high temperature.
Too much carbon deposition is easy to cause faults. It is inevitable for the engine to cause carbon deposition when it works, but when there is too much carbon deposition in various parts of the engine, different fault phenomena will occur.
For example, when there is too much carbon deposition in the combustion chamber, the compression ratio of the engine will increase, forming many hot surfaces, causing premature combustion and deflagration, and shortening the service life of the engine; Carbon deposits on the working surface of the valve and its seat ring will cause air leakage due to lax valve closure, resulting in poor engine starting, weak operation and easy valve ablation; The carbon and glue deposition on the valve guide and valve stem will accelerate the wear of the valve stem and valve guide, and even cause the valve stem to move astringently and jam in the valve guide, resulting in the failure of sticking the valve; The carbon deposition of the fuel injection nozzle will cause the different fuel injection volume of the fuel injection nozzle of each cylinder and make the engine shake; When too much carbon is deposited on the spark plug, the spark plug leaks electricity and cannot work, causing the engine to shake.
Therefore, experts suggest that car owners should pay more attention to the maintenance of the vehicle and regularly clean the carbon deposits in all parts of the engine in order to make the engine work better.
