INDUSTRY COMPONENT

Cylinder Liner

Cylinder liner is a cylindrical component that forms the inner surface of an engine cylinder, providing wear resistance and heat transfer.

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Component Specifications

Definition
A cylinder liner, also known as a cylinder sleeve, is a precision-machined cylindrical component installed within the engine block's cylinder bore. It serves as the sliding surface for piston rings, contains combustion pressure, facilitates heat transfer to the cooling system, and provides wear resistance to extend engine life. In compression chambers, it ensures proper sealing and dimensional stability under high thermal and mechanical loads.
Working Principle
The cylinder liner provides a smooth, hard-wearing surface for piston movement while containing high-pressure combustion gases. It transfers heat from combustion to the engine coolant through conduction, maintains cylinder geometry under thermal expansion, and minimizes friction through surface treatments. Its precise dimensions ensure proper piston clearance and compression ratios.
Materials
Typically made from cast iron alloys (gray iron, ductile iron, or alloyed cast iron) or steel, often with surface treatments like chromium plating, nitriding, or thermal spraying. Common specifications include SAE J431 (cast iron), ASTM A536 (ductile iron), or DIN 1691.
Technical Parameters
  • Hardness 180-300 HB
  • Inner Diameter 50-200 mm (varies by engine)
  • Wall Thickness 2-10 mm
  • Surface Roughness Ra 0.2-0.8 μm
  • Thermal Conductivity 40-80 W/m·K
Standards
ISO 6621, DIN 50190, SAE J431

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Cylinder Liner.

cylinder liner engine sleeve cylinder bore compression chamber piston surface engine components industrial machinery Cylinder Liner in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Compression Chamber

The sealed enclosure within an air compressor where air is compressed by reducing its volume.

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Engineering Analysis

Risks & Mitigation
  • Wear and scoring from inadequate lubrication
  • Thermal cracking due to overheating
  • Cavitation erosion from coolant pressure
  • Corrosion from acidic combustion products
FMEA Triads
Trigger: Insufficient lubrication or contaminated oil
Failure: Excessive wear, scoring, or scuffing of liner surface
Mitigation: Regular oil analysis, proper filtration systems, maintain correct oil viscosity and additives
Trigger: Cooling system failure or scale buildup
Failure: Overheating leading to thermal distortion or cracking
Mitigation: Regular coolant maintenance, proper water treatment, temperature monitoring systems
Trigger: Improper installation or incorrect clearances
Failure: Liner movement, coolant leakage, or piston seizure
Mitigation: Precision measurement tools, proper installation procedures, torque specifications adherence

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Diameter tolerance: ±0.02 mm, Circularity: 0.01 mm, Straightness: 0.02 mm per 100 mm
Test Method
Dimensional inspection with CMM, surface roughness testing with profilometer, hardness testing with Brinell/Rockwell, pressure testing for porosity, ultrasonic testing for material defects

Buyer Feedback

★★★★☆ 4.9 / 5.0 (24 reviews)

"Testing the Cylinder Liner now; the technical reliability results are within 1% of the laboratory datasheet."

"Impressive build quality. Especially the technical reliability is very stable during long-term operation."

"As a professional in the Machinery and Equipment Manufacturing sector, I confirm this Cylinder Liner meets all ISO standards."

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Frequently Asked Questions

What is the main function of a cylinder liner?

The primary functions are to provide a wear-resistant surface for piston movement, transfer heat from combustion to the cooling system, maintain cylinder geometry, and ensure proper sealing of combustion gases.

Can cylinder liners be replaced?

Yes, worn cylinder liners can be replaced through engine rebuilding processes. This is more cost-effective than replacing entire engine blocks and extends engine service life.

What causes cylinder liner failure?

Common causes include excessive wear from poor lubrication, overheating leading to thermal cracking, cavitation erosion from coolant pressure fluctuations, and corrosion from combustion byproducts.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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Cylinder housing Cylinder Shell