Overview
ISO 24163-2:2024 specifies standardized test methods and performance requirements for clamp-in tyre valves designed for tyre pressure monitoring systems (TPMS) in passenger cars and light-duty vehicles. This standard defines the testing protocols to determine the minimum performance levels required for valves assembled on rim holes with a diameter of 11.3 mm. By establishing rigorous and repeatable test methods, ISO 24163-2:2024 supports improved product quality, reliability, and safety in the application of TPMS technologies.
Key Topics
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Test Fixture and Valve Hole Dimensions:
Defines standards for test fixtures and rim holes, ensuring test consistency for various types of clamp-in valves used in TPMS applications.
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Leakage Tests:
Details several leakage test methods for valve core and valve-to-rim interfaces under various conditions:
- Room temperature, low temperature, and high temperature leakage
- Immersion tests using water or alcohol-based liquids
- Maximum acceptable leak rate specified
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Valve Core Performance:
Includes tests on valve core for:
- Room and extreme temperature leakage
- Over torque resistance
- Endurance (repeated actuation)
- Air flow rate
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Valve Cap and Seal Integrity:
Establishes requirements for valve cap sealing and tests for performance at room temperature.
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Mechanical Resistance:
Specifies testing procedures for:
- Over torque nut resistance
- High pressure endurance without bursting
- Radial force resistance using both force and weight methods
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Environmental Resistance:
Mandates ozone and neutral salt spray (NSS) tests to evaluate the durability of rubber seals and corrosion resistance of valve assemblies.
Applications
The practical value of ISO 24163-2:2024 lies in its universal applicability for manufacturers, automotive suppliers, and testing laboratories working with clamp-in tyre valves and TPMS. Key applications include:
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Quality Assurance:
Ensures that clamp-in TPMS valves meet defined quality and performance standards across operating temperatures, pressures, and environmental exposures.
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Product Design and Development:
Provides engineers with standardized performance benchmarks for designing valves that are reliable and safe for modern vehicles.
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Certification and Compliance:
Assists organizations in demonstrating regulatory compliance and facilitates third-party certification of tyre valves.
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Aftermarket and OEM Supply:
Harmonizes requirements for both original equipment manufacturers (OEMs) and aftermarket suppliers, reducing variability and promoting interchangeability.
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Vehicle Safety Enhancements:
Supports TPMS functionality, which is critical to tyre safety by helping maintain correct pressures, reducing blowout risk and improving overall vehicle performance.
Related Standards
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ISO 24163-1:
Clamp-in tyre valves for tyre pressure monitoring systems - Part 1: Definition, types, dimensions, and valve interface. Establishes foundational terminology and dimensions for TPMS valves.
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ISO 9413:
Tyre valves - Dimensions and designation. Specifies dimensional requirements for tyre valves.
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ISO 3877-2:
Tyres, valves, and tubes – List of equivalent terms - Part 2: Tyre valves. Offers standardized terminology relevant to tyre valves.
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ISO 14960-2:
Tubeless tyres - Valves and components - Part 2: Clamp-in tubeless tyre valve-test method. Provides additional test methods related to tubeless tyre valves.
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ISO 9227:
Corrosion tests in artificial atmospheres - Salt spray tests. Referenced for corrosion-resistance testing of valve assemblies.
Summary
By adopting ISO 24163-2:2024, organizations ensure that clamp-in TPMS valves deliver improved durability, performance, and safety for passenger cars and light-duty vehicles. The standard’s comprehensive testing protocols help foster global harmonization, trust, and engineering best practices in the critical interface between tyres and vehicle safety systems. For manufacturers and suppliers, compliance with this international standard is an essential step toward market acceptance and regulatory alignment in the automotive sector.