Service HotlineMeasures to reduce wear of bimetallic cylinder liners: 1. Strengthening the maintenance of filters to maintain good working condition of air filters, oil filters, and fuel filters is crucial for reducing the wear of bimetallic cylinder liners. Strengthening the maintenance of the "three filters" is an important measure to prevent mechanical impurities from entering the cylinder, reduce cylinder wear, and extend the service life of the engine, especially in rural and windy areas. Some drivers are wrong to not install air filters in order to save fuel.
2. Choose lubricating oil correctly. Lubricants with viscosity values should be selected strictly according to the season and engine performance requirements. It is not allowed to purchase inferior lubricating oil at will, and the quantity and quality of lubricating oil should be regularly inspected and maintained.
3. Maintain the normal operating temperature of the engine. The normal operating temperature of the engine should be 80-90 ℃. If the temperature is too low to maintain good lubrication, it will increase the wear of the cylinder wall. The water vapor inside the cylinder is prone to condense into water droplets, dissolve acidic gas molecules in the exhaust gas, and generate acidic substances, thereby causing corrosion and wear of the cylinder wall. Experiments have shown that when the cylinder wall temperature drops from 90 ℃ to 50 ℃, the cylinder wear is four times that of 90 ℃. Excessive temperature can reduce the strength and wear of the cylinder, and even cause the piston to expand excessively, resulting in "cylinder expansion" accidents.
4. During cold start of the engine, insufficient oil supply from the oil pump may occur due to low oil temperature, high viscosity, and poor fluidity. At the same time, the oil on the original cylinder wall flows downwards along the cylinder wall after parking, and cannot obtain the same good lubrication as during normal operation at the moment of starting, greatly increasing the wear of the cylinder wall during starting. So when starting, the engine should idle a few times and wait for the friction surface to lubricate before starting. After starting, idle and preheat. It is strictly prohibited to forcefully tap the oil port. Wait until the standby oil temperature reaches 40 ℃ before starting. When starting, you should stick to low gear and drive a certain distance in each gear until the oil temperature is normal before switching to normal driving.
5. Improve warranty quality. During use, promptly eliminate any problems and replace or repair damaged or deformed parts at any time. When installing bimetallic cylinder liners, strict inspection and assembly should be carried out according to technical requirements. In the operation of replacing the warranty ring, a piston ring with appropriate elasticity should be selected. If the elasticity is too small, it will cause gas to enter the crankcase, blow off the oil on the cylinder wall, and increase the wear of the cylinder wall; Excessive elasticity can directly exacerbate the wear of the cylinder wall, or damage the oil film on the cylinder wall and exacerbate its wear.
As is well known, bimetallic cylinder liners are one of the main components of combustion chambers, and sometimes small parts also play a significant role. Now the manufacturer of bimetallic cylinder liners will introduce to you the reasons for abnormal wear of bimetallic cylinder liners.
1. Severe wear in the middle of the bimetallic cylinder liner: related to corrosion wear caused by engine undercooling and frequent cold starts, the cooling system should be checked.
2. Severe wear of the top dead center piston ring indicates that the engine is overheated and the heat dissipation is poor. Check the cooling system and ignition system (including spark plug selection), and check if the connecting rod big end bearing is loose.
3. Severe wear of the upper bimetallic cylinder liner: related to inhaling a large amount of dust or carbon buildup. The air filter should be maintained or replaced, carbon deposits should be removed, and whether it is caused by oil grooves should be checked.
4. The lower bimetallic cylinder liner of the cylinder is severely worn: the oil contains a large amount of metal abrasive particles or dust, and should be replaced with clean oil.
