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128mm OM457 Diesel Engine Cylinder Liner
The OM457 is a popular Mercedes-Benz diesel engine, and the cylinder liner is a vital component within the engine's cylinder block
The cylinder liner, also known as a cylinder sleeve, serves several critical functions:
Cylinder Bore Surface: The cylinder liner provides a smooth and durable inner surface for the engine's cylinder bore. This surface allows the engine's piston to move up and down within the cylinder while maintaining a proper seal. The liner's surface must be resistant to wear, corrosion, and heat.
Piston and Piston Rings: The cylinder liner accommodates the engine's piston and piston rings. The piston rings create a seal between the piston and the liner, preventing the escape of combustion gases and maintaining compression in the cylinder.
Heat Dissipation: The cylinder liner helps regulate and dissipate heat generated during combustion, preventing overheating of the engine block and maintaining the appropriate temperature within the cylinder.
Wear Resistance: Liners are typically made from materials that are highly wear-resistant and heat-resistant, such as cast iron or alloyed cast iron. This choice of material ensures that the liner can withstand the mechanical stresses and heat generated during engine operation.
Coolant Sealing: The cylinder liner properly seals off the coolant passages, preventing coolant from entering the combustion chamber.
The cylinder liner is a high-quality component that is designed to provide exceptional durability and performance. Made from high-strength alloy material, the cylinder liner is highly resistant to wear and corrosion, ensuring that it can withstand the rigors of heavy-duty applications. Its precision machining ensures optimal performance and reliability, while its superior heat dissipation properties help to prevent overheating and reduce the risk of engine damage.
Excellent Heat Dissipation Properties:
The cylinder liner is designed to efficiently dissipate heat generated during engine operation, which helps to prevent overheating and reduce the risk of engine damage. The cylinder liner’s high-strength alloy material and precision machining enable it to efficiently transfer heat away from the engine, ensuring that it operates at optimal temperatures. Additionally, the cylinder liner’s design is optimized for maximum heat dissipation, with features such as cooling fins and strategically placed coolant passages. This ensures that the engine remains cool and operates efficiently, even under heavy loads and in harsh working conditions.
Right Installation Makes Long Service Life:
During installation, it is essential to use the correct tools and techniques to ensure that the cylinder liner is properly aligned and seated. Additionally, regular inspections and maintenance are necessary to detect and address any issues that may arise, such as wear or damage. By following proper installation and maintenance procedures, the cylinder liner can provide reliable and long-lasting performance, ensuring that the engine operates smoothly and efficiently.
Product Parameter：
|
Product Name |
Engine Crankshaft |
|
Application |
Engineering Machinery Engine |
|
Engine Number |
OM457 |
|
Inner Diameter |
128mm |
|
Outer Diameter |
145.8mm |
|
Step Height |
11.1m |
|
Length |
266mm |
|
Max Outer Diameter |
155.5mm |
|
Car Model |
MERCEDES BENZ |
|
Size |
STD |
|
Condition |
New |
|
Warranty |
3 Months |
|
Packing |
Neutral Packing |
|
Application Industries |
Machinery Repair Shops, Retail, Vehicles & Accessories |
Application:
- Heavy-duty Vehicles: widely used in the engines of heavy-duty vehicles such as trucks, excavators, and loaders. These vehicles typically require high power and torque engines to meet the demands of heavy loads and high-intensity work;
- Generator Sets: These engines require high efficiency and reliability to ensure that the generator sets can operate stably under various environmental and load conditions;
- Marine: widely used in the engines of ships. These engines require high power and efficiency to meet the various needs of ships at sea, such as sailing speed and carrying capacity;
- Industrial: such as power plants and mining equipment. These applications require high power and efficiency engines to meet production and work demands;
- Agriculture: such as tractors and harvesters. These machines require high power and efficiency engines to meet the demands of agricultural production.
A cylinder liner, referred to as cylinder liner, is a cylinder set in the cylinder barrel of the cylindrical parts, the top by the cylinder head pressed fixed, and the piston and cylinder head together to form a combustion chamber.
Cylinder liner features
1. High temperature and high-pressure resistance.
2. Good wear resistance.
3. The inner surface hardness is suitable, and the piston ring hardness match.
4. The inner surface has a certain degree of roughness to play the role of oil storage and abrasion.
5. The inner surface has sufficient roundness and cylindricity accuracy, and the installation support surface has high positional accuracy at the center of the inner bore.
6. Good lubrication and cooling function to support its work.
Role of cylinder liner
1. With the cylinder head, pistons together constitute the cylinder working space.
2. The cylinder liner of the cylinder piston diesel engine to bear the piston side thrust, become the piston reciprocating motion of the guide course.
3. The piston assembly and its heat transfer to the cooling water, so that the working temperature is appropriate.
4. The cylinder liner of the two-stroke diesel engine is arranged with a gas port, opened and closed by the piston, to achieve air distribution.
Cylinder liner classification
Dry cylinder liner type
That is, no contact with the coolant structure form, thicker wall, inside and outside the surface to ensure the necessary bit type accuracy and easy disassembly.
Advantages: cylinder center distance is small, light mass, body stiffness, processing technology is simple. Disadvantages: poor heat transfer, the temperature distribution is not uniform, and easy to local deformation.
Wet cylinder liner type
That is, direct contact with the coolant structure form, wall thickness 5 ~ 8 mm, radial positioning through the upper and lower positioning ring belt, axial positioning through the upper flange of the cylinder liner, and the corresponding support surface at the top of the body to achieve.
Advantages: casting is easy because the body is not a sealed water jacket; heat transfer performance, and temperature distribution are relatively uniform, and disassembly and installation are fast and easy to repair. The disadvantage is that the body stiffness is poor and easy to leak.
No cylinder sleeve type
No cylinder sleeve type body, as the name implies, that is, the body without the cylinder sleeve structure form, in the body directly machined cylinder.
Advantages: can shorten the cylinder center distance, and reduce the size and weight of the body. Disadvantages: poor economy, high cost.
As part of the engine body, we need to understand the performance of the engine, based on the cylinder liner maintenance, use the right lubricant, and pay attention to seasonal changes in the selection of the correct lubricant, but also pay attention to check the quantity and quality of lubricants, to prevent deterioration of lubricants. Strengthen the "three filters" maintenance, is to prevent mechanical impurities into the cylinder, reduce cylinder wear, and extend the service life of the engine an important measure.
The cylinder liner should meet:
The cylinder liner should have sufficient strength, rigidity, and heat resistance, and should also have good wear resistance.
Cylinder liner work should be good lubrication and cooling. The back does not contact the cooling water cylinder liner called the dry cylinder liner, the back, and cooling water contact cylinder liner is a wet cylinder liner. Dry cylinder liner thickness is thin, simple in structure, and easy to process. Wet cylinder liner direct contact with cooling water, so it is conducive to the cooling of the engine, is conducive to the small lightweight engine.
