SAE USCAR-48-2025 烟火预紧器要求和验证

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Pyrotechnic Pretensioner

Requirements and Validation

SAE/USCAR-48

February 2025

ISBN: 978-1-4686-0940-0

__________________________________________________________________________________________________________________________________________

The research data, analysis, conclusion, opinions, and other contents of this document are solely the product of the authors. Neither the SAE International (SAE) nor the United

States Council for Automotive Research (USCAR) certifies the compliance of any products with the requirements of nor makes any representations as to the accuracy of the

contents of this document nor to its applicability for purpose. It is the sole responsibility of the user of this document to determine whether or not it is applicable for their purposes.

QUESTIONS REGARDING THIS DOCUMENT: (248) 273-2470 FAX (248) 273-2494

TO PLACE A DOCUMENT ORDER: (724) 776-4970 FAX (724) 776-0790

SUMMARY OF

TABLE OF CONTENTS

1. INTRODUCTION .............................................................................................................................................................. 3

1.1 Scope

1.2 Definitions

2. APPLICABLE DOCUMENTS ........................................................................................................................................... 4

2.1 List of Applicable Documents

2.2 Boundary Diagram

3. REQUIREMENTS ............................................................................................................................................................. 5

3.1 General Requirements ............................................................................................................................................. 5

3.1.1 Micro Gas Generators (MGGs)

3.1.2 Tensioner Operating Temperature

3.1.3 Tensioner Emission of Energy

3.1.4 Emission of Particulates or Gases

3.1.5 Effluent (Emissions) Flammability

3.1.6 Cotton Wrap Evaluation for Emissions

3.1.7 Pressure Vessel Structural Integrity

3.1.8 Tensioner Cable Robustness to MGG Gas

3.2 General Requirements for Lap/Buckle Pretensioner Devices .................................................................................. 7

3.2.1 Structural Integrity Requirements

3.2.2 Static Evaluation Requirements

3.2.3 Dynamic Evaluation Requirements

3.2.4 Tensioner Static Strength When Integrated into an Anchor

3.2.5 Tensioner Static Strength When Integrated into a Buckle

3.2.6 Tensioner Under Compressive Loading (Back Drive)

3.2.7 Tensioner Deployment Locking

3.3 General Requirements for Retractor Pretensioner ................................................................................................... 9

3.3.1 Structural Integrity Requirements

3.3.2 Static Evaluation Requirements

3.3.3 Dynamic Evaluation Requirements

3.3.4 Static Strength after Deployment

3.3.5 Static Strength without Deployment

3.3.6 Retractor Pretensioning Performance

3.3.7 Dynamic Locking Dip Requirement

4. LOT ACCEPTANCE TESTING (LAT) REQUIREMENTS (ALL PRETENSIONERS) .................................................... 11

(Reserved for future release)

5. VALIDATION PROCEDURES (TEST METHODS) ........................................................................................................ 11

5.1 Test Quantities, Parameters, and Tolerances ........................................................................................................ 11

SAE/USCAR-48

Issued 2025-02

PYROTECHNIC PRETENSIONER REQUIREMENTS AND VALIDATION

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摘要：

本页面详细解读 SAE USCAR-48-2025 标准，该标准专门针对汽车烟火式预紧器（seat belt pyro pre-tensioner）的性能要求与验证方法进行规范。作为最新的2025版本，它明确了预紧器在极端温度、动态载荷、气体发生器压力等工况下的可靠性测试流程，以及电子触发系统的安全冗余指标。无论您是车辆被动安全工程师、供应链质检人员还是法规合规专家，都可以通过本文快速掌握USCAR-48的核心测试项目、验收判据及与传统机械预紧器的技术差异，为产品开发与项目审核提供权威参考。

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