Detail of GB 27887-2024

Introduction of GB 27887-2024

Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative. This document is developed in accordance with the rules given in GB/T 1.1-2020 Directives for standardization - Part 1: Rules for the structure and drafting of standardizing documents. This document replaces GB 27887-2011 Restraining devices for child occupants of power-driven vehicles. In addition to structural adjustments and editorial changes, the following main technical changes have been made with respect to GB 27887-2011: ——The scope of application of the document has been modified (see Clause 1 hereof; Clause 1 of Edition 2011); ——Some terms and definitions have been modified (see Clause 3 hereof; Clause 3 of Edition 2011); ——The classification of child restraint systems has been deleted (see 4.1 of Edition 2011); ——The general requirements for the installation positions and securing methods of child restraint systems in vehicles have been modified (see 4.1 hereof; 4.2 of Edition 2011); ——The structural requirements for child restraint systems have been modified (see 4.2 hereof; 4.3 of Edition 2011); ——The requirements for materials used in child restraint systems have been modified (see 4.3.1 hereof; 4.2.5 and 4.2.6 of Edition 2011); ——The requirements for the dimensions and mass of child restraint systems have been modified (see 4.3.2 hereof; 4.4.1 of Edition 2011); ——The wording for the locking identification of ISOFIX attachments has been modified (see 4.3.3.3 hereof; 4.4.2.3 of Edition 2011); ——The provisions related to adjustment of ISOFIX child restraint systems have been deleted (see 4.4.4 of Edition 2011); ——The general requirements for support legs and support-leg foot of i-Size CRS, as well as their dimensions, and adjustment ranges have been added (see 4.3.5 hereof); ——The general requirements, additional requirements, and dummy injury criteria for dynamic test of child restraint systems have been modified (see 5.1.5 hereof; 5.1.4 of Edition 2011); ——The requirements for positions of buckles of Group II and Group III child restraint systems have been deleted (see 5.2.1.5 of Edition 2011); ——The requirements for shoulder strap positioners of child restraint systems have been added (see 5.2.2 hereof); ——The requirements for minimum width of straps of child restraint systems have been modified (see 5.2.5.1 hereof; 5.2.4.1 of Edition 2011); ——The requirements for strength of straps of child restraint systems under special conditions have been modified (see 5.2.5.3.2 hereof; 5.2.4.3.2 of Edition 2011); ——The requirements for performance of locking mechanisms on the attachments of ISOFIX child restraint systems have been added (see 5.2.6.2 hereof); ——The method for performing rotation test on child restraint systems has been modified (see 6.1.2 hereof; 6.1.2 of Edition 2011); ——The description for dynamic test has been modified (see 6.1.3.1 hereof; 6.1.3.9 of Edition 2011); ——The descriptions for the methods used to conduct front impact and rear impact tests on sleds and standard seats have been modified (see 6.1.3.2.1 and 6.1.3.2.2 hereof; 6.1.3.2.1 and 6.1.3.2.2 of Edition 2011); ——The description for decelerated or accelerated sleds has been modified (see 6.1.3.2.1.4 hereof; 6.1.3.1 of Edition 2011); ——The method for conducting side impact sled test on sleds and standard seats has been added (see 6.1.3.2.3 hereof); ——The requirements for measurement of stopping distance in dynamic test have been deleted (see 6.1.3.2.1.3 and 6.1.3.3.1.6 of Edition 2011); ——The dynamic test conditions for different test configurations have been modified (see Table 6 hereof; Table 3 of Edition 2011); ——The dynamic test method for child restraint systems including additional anchorages has been deleted (see 6.1.3.6 of Edition 2011); ——The procedures for installation of test dummies have been modified (see 6.1.3.6.2 hereof; 6.1.3.7 of Edition 2011); ——The requirements before the start of dynamic tests after dummy installation have been added (see 6.1.3.6.3 hereof); ——The method for selecting test dummies for dynamic tests has been modified (see 6.1.3.7 hereof; 6.1.3.8 of Edition 2011); ——The method for adjusting support legs has been modified (see 6.1.3.8 hereof; 5.1.4.1.9 of Edition 2011); ——The method for restraining booster cushions has been deleted (see 6.1.4 of Edition 2011); ——The description for micro-slip test has been modified (see 6.2.3 hereof; 6.2.3 of Edition 2011); ——The procedures and load requirements for the abrasion test have been modified (see 6.2.5.2.7.3 and Table 9 hereof; 6.2.5.2.7.3 and Table 4 of Edition 2011); ——The description of the test method for adjusting devices has been modified (see 6.2.6 and Annex U hereof; 6.2.7 and Annex S of Edition 2011); ——The method for testing ISOFIX attachments has been added (see 6.2.8 hereof); ——The requirements for video recording during dynamic tests have been modified (see 6.4 hereof; 6.4.1.1 of Edition 2011); ——The electrical measurement channel frequency classes for the abdomen have been added (see Table 10 hereof); ——The content to be recorded in the measurement results in the test report has been modified (see Clause 7 hereof; Clause 7 of Edition 2011); ——The requirements for identification of child restraint systems have been modified (see Clause 8 hereof; Clause 8 of Edition 2011); ——The requirements for instructional guidance documents of child restraint systems have been modified (see Clause 9 hereof; Clause 9 of Edition 2011); ——The conditions for determining the same type of child restraint system have been added (see Clause 10 hereof); ——The provisions for standard implementation during transition period have been added (see Clause 11 hereof); ——The requirements for additional anchorages of child restraint systems have been modified (see Annex A hereto; Annex J to Edition 2011); ——The content related to non-retractable two-point safety-belts in the requirements for standard safety-belts has been deleted (see Annex B hereto; M.5 and M.6 in Annex M to Edition 2011); ——The requirements for booster cushion height measuring device, as well as the measurement methods have been added (see Annex C hereto); ——The provisions for lower torso test have been modified (see Annex D hereto; 6.1.4 and Annex X of Edition 2011); ——The method for evaluation of the internal geometric dimensions of child restraint systems, as well as the measurement requirements have been added (see Annex E hereto); ——The provisions for the i-Size support-leg dimension assessment volume and support-leg foot assessment volume have been added (see Annex F hereto); ——The test procedures for material energy absorption test have been modified (see Annex G hereto; Annex Q to Edition 2011); ——The provisions for the method used to determine the head impact area have been modified (see Annex H hereto; R.1 in Annex R to Edition 2011); ——The material characteristic parameters of the standard seat backrest and seat cushion on the sled, as well as the relevant dimensions of the covering materials, have been modified (see I.3.1 in Annex I hereto; E.3.1 in Annex E to Edition 2011); ——The dimensions of the standard seat and seat cushion for the sled test, the arrangement of anchorages, and the positions of belt anchorages have been modified (see I.4 and I.5 in Annex I hereto; E.5 and E.7 in Annex E to Edition 2011); ——The definition and performance requirements for side impact doors have been added (see I.6 in Annex I hereto); ——The requirements for dimensions of stopping devices have been deleted (see E.6 in Annex E to Edition 2011); ——Method used to determine performance indicators in dynamic tests has been added (see Annex J hereto); ——The requirement for the internal height of seat backrests of child restraint system has been deleted (see Annex K to Edition 2011); ——Illustrations and relevant dimensional parameters of the load applying device for the rotation test have been added (see Annex L hereto); ——The definition of the side impact curve and the curve of the relative velocity between the sled and door panel over time in side impact tests have been added (see Table M.3 and Figure M.3 in Annex M hereto); ——The explanatory notes have been deleted (see Annex P to Edition 2011); ——Description of the dummy has been modified (see P.1 in Annex P hereto; Annex G to Edition 2011); ——Procedures for calibrating the dummy have been added (see P.2 and P.3 in Annex P hereto); ——Method for testing strength of buckle has been modified (see Annex Q hereto; 6.2.1.3.2 and Annex T of Edition 2011); ——Requirements for measuring the minimum dimensions of side wings have been deleted (see R.2 and R.3 in Annex R to Edition 2011); ——The schematic diagrams for the wear and micro-slip test procedures have been modified (see Annex T and Annex R hereto; Annex D to Edition 2011); ——The description of the dynamic impact test apparatus has been deleted (see Annex U to Edition 2011); ——The method for operating durability test of adjusting devices has been modified (see Annex U hereto; Annex S to Edition 2011). Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all such patent rights. This document was proposed by and is under the jurisdiction of the Ministry of Industry and Information Technology of the People's Republic of China. The previous edition of this document is as follows: ——First published as GB 27887-2011 in 2011, with Amendment 1 issued in 2019; ——This is the first revision. Child restraint systems for power-driven vehicles 1 Scope This document defines the terms and definitions of child restraint system (CRS) for power-driven vehicles, specifies the general requirements, performance requirements, test reports, identification and instructions, and describes the corresponding test methods. This document is applicable to the following types of CRS suitable for installation on power-driven vehicles: a) Integral universal ISOFIX child restraint system (i-Size CRS); b) Integral ISOFIX child restraint system for specific vehicle; c) Integral universal belted child restraint system; d) Integral universal belted child restraint system for specific vehicle; e) Non-integral universal child restraint system with backrest (i-Size booster seat); f) Non-integral child restraint system with backrest for specific vehicle (specific vehicle booster seats); g) Non-integral universal child restraint system without backrest (universal booster cushion); h) Non-integral child restraint system without backrest for specific vehicle (specific vehicle booster cushion). 2 Normative references The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 231.1 Metallic materials - Brinell hardness test - Part 1: Test method GB/T 3505 Geometrical product specifications (GPS) - Surface texture: Profile method - Terms, definitions and surface texture parameters GB/T 4780 Terms for motor vehicle body GB 6675.3 Safety of toys - Part 3: Flammability GB 6675.4 Safety of toys - Part 4: Migration of certain elements GB 8410 Flammability of automotive interior materials GB/T 8427 Textiles - Tests for color fastness - Color fastness to artificial light: Xenon arc fading lamp test GB 14166 Safety-belts and restraint systems for occupants of power-driven vehicles GB 14167 Safety-belt anchorages and restraint systems anchorages for occupants of power-driven vehicles ISO 2575:2010 Road vehicles - Symbols for controls, indicators and tell-tales ISO 6487:2015 Road vehicles - Measurement techniques in impact tests - Instrumentation 3 Terms and definitions For the purposes of this document, the terms and definitions given in GB/T 4780, GB 14166, GB 14167 and the following apply. 3.1 child restraint system; CRS child seat device restraining the movement of the child's body to reduce the injury to the wearer in the case of collision accident or sudden deceleration of the vehicle, keeping the child occupant in a sitting or sleeping position 3.2 integral class child restraint system category in which a child is only restrained by the components of the CRS, rather than directly being restrained by the vehicle belt Note: The components of CRS include child harness belt and impact shield. 3.3 non-integral class child restraint system category in which a child is restrained in the child restraint system directly by the vehicle belt 3.4 rigid fixture for the child restraint system ISOFIX international universal child restraint system that connects the CRS with the vehicle through two lower anchorages on the vehicle, two corresponding rigid connecting devices on the child restraint system, and a device that restricts the child restraint system from rotation 3.5 built-in child restraint system child restraint system that is a part of a vehicle or a vehicle seat and is fixed to the vehicle 3.6 universal child restraint systems product type applicable to child restraint systems on all i-Size seats or all universal seating positions 3.6.1 integral universal ISOFIX child restraint system i-Size CRS ISOFIX child restraint system which is suitable for all i-Size seats of the vehicle, and restricts the child restraint system from rotating through ISOFIX top tether straps or support legs 3.6.2 integral universal belted child restraint system child restraint system which is suitable for all universal seating positions of the vehicle and is only fixed by the vehicle belt 3.6.3 non-integral universal child restraint system with backrest i-Size booster seat child restraint system applicable to all i-Size seats of vehicle, with backrest and retractable ISOFIX attachment (if any) 3.6.4 non-integral universal child restraint system without backrest universal booster cushion child restraint system mainly used for all i-Size seats and universal seating positions of vehicles, without backrest and with retractable ISOFIX attachment as required 3.7 child restraint system for specific vehicle child restraint system for designated vehicles 3.7.1 integral ISOFIX child restraint system for specific vehicle integral ISOFIX child restraint system using low anchorage of ISOFIX for specific vehicles 3.7.2 integral belted child restraint system for specific vehicle integral child restraint system on a specific vehicle used to fix the child restraint system through the vehicle belt or combined with other connection means as required   3.7.3 non-integral child restraint system with backrest for specific vehicle specific vehicle booster seat non-integral child restraint system with backrest for specific vehicles Note: This type includes the built-in child restraint system. 3.7.4 non-integral specific vehicle booster cushion specific vehicle booster cushion non-integral child restraint system without backrest for specific vehicles Note: This type includes the built-in child restraint system. 3.8 size range child’s body height range covered when the child restraint system is designed and certified 3.9 orientation direction against the vehicle when the child restraint system is used 3.9.1 forward-facing installation direction which is the same as the normal driving direction of the vehicle 3.9.2 rearward-facing installation direction which is opposite to the normal driving direction of the vehicle 3.9.3 lateral-facing installation direction which is vertical to the normal driving direction of the vehicle 3.10 special needs restraint restraint system specially designed to meet the special needs of children with physical or mental disabilities 3.11 ISOFIX anchorages system a set of system for fixing ISOFIX child restraint system, which consists of two ISOFIX low anchorages on the vehicle and ISOFIX attachment on the child restraint system 3.11.1 ISOFIX low anchorage a 6-mm diameter horizontal rigid round rod extending from the vehicle structure or seat structure, which is a vehicle structural component used in conjunction with the ISOFIX attachment on the child restraint system 3.11.2 ISOFIX attachment attachment extending from the ISOFIX child restraint system structure and used in conjunction with the ISOFIX low anchorage of the vehicle 3.12 anti-rotation device device used in conjunction with ISOFIX anchorages system to prevent the child restraint system from rotating (around the Y axis of the vehicle) during vehicle impact Note 1: Including ISOFIX top tether strap or support leg. Note 2: The anti-rotation device of ISOFIX child restraint system for specific vehicles adopts top tether strap, support legs or other means to prevent rotation. 3.13 ISOFIX top tether strap a webbing strap extending from the top of an ISOFIX child restraint system to the ISOFIX top tether anchorage, and which is equipped with an adjusting device, a tension relieving device, and an ISOFIX top tether connector 3.13.1 ISOFIX top tether anchorage component fixed on the vehicle and connected with the ISOFIX top tether connector to transfer the restraining force to the vehicle 3.13.2 ISOFIX top tether connector component of the child restraint system connected to the ISOFIX top tether strap anchorage of the vehicle 3.13.3 ISOFIX top tether hook a typical ISOFIX top tether connector used to install the ISOFIX top tether strap to the ISOFIX top tether anchorage on the vehicle   3.14 tension relieving device device for releasing the tension of ISOFIX top tether strap 3.15 support leg an anti-rotation device that is permanently connected to the child restraint system and transfers the load between the vehicle body structure and the child restraint system 3.15.1 support-leg foot one or more parts of the support leg that are in contact with the vehicle floor Note: It is used to transfer the load applied by the support leg to the vehicle floor during front impact. 3.15.2 support-leg foot contact surface surface of the support leg in direct contact with the vehicle floor Note: It is used to disperse the load and transfer it to the vehicle body structure. 3.15.3 support-leg foot assessment volume space volume used to check the adjustment range and size limit of the support-leg foot Note: It corresponds to the assessment volume of support-leg foot specified in GB 14167. 3.15.4 support-leg dimension assessment volume volume used to check the largest size of the support leg Note: It corresponds to the i-Size support leg installation assessment volume specified in GB 14166. 3.16 child restraint fixture; CRF device used to check whether the dimensions of a child restraint system are appropriate for the system to be installed in the ISOFIX position of a vehicle 3.17 vehicle seat fixture; VSF device used to check the external dimensions of a child restraint system and the connection position of ISOFIX   3.17.1 ISOFIX vehicle seat fixture a series of devices used to check the external dimensions of an integral universal belted child restraint system or an ISOFIX child restraint system, as well as the position of the ISOFIX attachment Note: This includes fixtures for nine dimension categories, namely, ISO/F3, ISO/F2, ISO/F2X, ISO/R3, ISO/R2, ISO/R2X, ISO/R1, ISO/L1 and ISO/L2, whose specific shapes and dimensions are as specified in GB 14166. 3.17.2 i-Size booster seat fixture device used to check the external dimensions of an i-Size booster seat or a universal booster cushion, as well as the position of the ISOFIX attachment Note: This includes fixtures for two dimension categories, namely, ISO/B2 and ISO/B3, whose specific shapes and dimensions are as specified in GB 14166. 3.18 child harness belt harness a child-restraining strap assembly consisting of a lap strap, shoulder straps, and a crotch strap 3.19 Y-shaped belt a child-restraining strap composed of several straps fastened between the child’s thighs and over both shoulders 3.20 carry cot restraint system that positions and secures the child in either a supine or prone position, with the child’s spine perpendicular to the central axis plane of the vehicle Note: This design is intended to provide restraint protection for the child’s head and torso (excluding the limbs) during a vehicle impact. 3.21 infant carrier integral CRS that positions the infant in a rearward-facing, semi-reclined position and allows the child, along with the child restraint system, to be removed from the vehicle without unfastening the child harness belt Note: This design is intended to provide restraint protection for the child’s head and torso (excluding the limbs) during a vehicle impact. 3.22 impact shield restraint device installed in front of the child that distributes impact loads over a larger area of the child's torso 3.23 strap flexible parts used to transmit loads 3.24 child-restraining strap a component of the child harness belt, designed solely to restrain the child’s body 3.25 lap strap strap that extends across the front of the child's pelvic part, designed to restrain the child's crotch directly or indirectly Note: A lap strap may be a single complete strap or a part of the child-restraining strap. 3.26 shoulder strap a restraining strap designed to secure the upper torso of the child 3.27 crotch strap a strap positioned between the child’s legs, consisting of one or multiple separate straps, connecting to the child restraint system and the lap belt Note: The purpose of the crotch strap is to prevent the child from sliding under the lap belt during normal use and to prevent the lap belt from moving upward and slipping off the child’s pelvic part in the event of an impact. 3.28 buckle a device that enables the child to be restrained by the restraint system or secures the restraint system to the vehicle body structure, while allowing for quick release 3.28.1 enclosed buckle release button a buckle release button that cannot be operated using a 40-mm diameter sphere   3.28.2 non-enclosed buckle release button a buckle release button that can be operated using a 40-mm diameter sphere 3.29 adjusting device a device used to adjust the restraint system or its attachments to fit the body shape of the wearer Note: The adjusting device may be part of the buckle, a retractor, or another component of the restraint system. 3.30 quick adjuster an adjusting device that can be easily and smoothly operated with one hand 3.31 energy absorber a component of the child restraint system that may absorb energy independently or work in conjunction with the strap to absorb energy 3.32 retractor a device used to retract part or all of the straps in a child restraint system 3.32.1 automatically-locking retractor a retractor that allows the strap to be freely pulled out to the desired length and automatically adjusts the strap length to fit the wearer’s body shape when the buckle is fastened Note: The strap cannot be further extended unless the wearer deliberately unlocks it. [Source: GB 14166-2024, 3.9.3, modified] 3.32.2 emergency-locking retractor retractor that does not restrict the movement of the safety-belt wearer under normal driving conditions Note: This retractor includes a length adjustment mechanism that automatically adjusts the strap length according to the body shape of the wearer. It also features a locking mechanism that engages in emergency situations due to the following factors: a) Vehicle deceleration, strap extension from the retractor, or any other automatic trigger (single sensitivity); b) Any combination of the above factors (composite sensitivity). [Source: GB 14166-2024, 3.9.4, modified] 3.33 shoulder strap positioner a device that, under normal driving conditions, connects the shoulder straps to each other to keep them in the correct position on the child’s torso 3.34 insert part of the child restraint system that provides additional support for child occupants 3.35 inclined position a special position that allows the child to sit at an inclined angle on the seat 3.36 displacement device a device capable of causing an angular or longitudinal displacement of a child restraint system or one of its components 3.37 locking device a device that ensures the child restraint system and its components remain in their intended position during use 3.38 load limiting device a device that limits load by breaking or jamming under specific load conditions defined in the technical documentation 3.39 lock-off device a device used to lock and prevent movement of one part of a vehicle belt strap relative to another Note: It acts on the shoulder strap or lap belt portion of the vehicle belt, or on both portions simultaneously.   3.39.1 class A device a device that prevents the child from pulling the strap out of the retractor and loosening the lap belt when the child is directly restrained by the vehicle belt 3.39.2 class B device a device that maintains appropriate tension in the lap belt portion of an adult occupant’s safety-belt when restraining an integral CRS using the vehicle belt Note: It prevents the strap from slipping out of the retractor, which could loosen the tension and cause the restraint system to be in a suboptimal usage state. 3.40 module a component of a child restraint system designed to be used with the base, directly in contact with the child, and without an ISOFIX attachment Note: It shall be used with the base or independently. 3.41 base a component of the child restraint system that is attached to the vehicle via the ISOFIX anchorages or the vehicle belt and an anti-rotation device (if applicable). It is positioned between the vehicle and the module but does not come into direct contact with the child occupant Note: The same base may be used with one or more modules (e.g., Module A, Module B, etc.). 3.42 belt route designated path through which the vehicle belt is routed to secure an integral CRS or to restrain the occupant in a non-integral CRS Note: If the child restraint system is secured symmetrically, the belt routes are considered identical. 3.43 webbing path critical areas on the child restraint system where the vehicle belt must pass through as part of the belt route

Contents of GB 27887-2024

Foreword II 1 Scope 2 Normative references 3 Terms and definitions 4 General requirements 5 Performance requirements 6 Test methods 7 Test report 8 Identification 9 Instructional guidance document 10 Determination of the same type 11 Implementation of this standard Annex A (Normative) Requirements for additional anchorages for rearward-facing belted CRSs for specific vehicle Annex B (Normative) Standard safety-belts Annex C (Normative) Height measuring device and measurement method for booster cushion Annex D (Normative) Lower torso test Annex E (Normative) Internal dimensions Annex F (Normative) i-Size support-leg dimension assessment volume and support-leg foot assessment volume Annex G (Normative) Energy absorption test method Annex H (Normative) Method for determining the head impact area Annex I (Normative) Description of the sled Annex J (Normative) Determination of performance indicators for dynamic test Annex K (Normative) Corrosion test Annex L (Normative) Load applying devices Annex M (Normative) Time function curves for braking deceleration or acceleration of the sled Annex N (Normative) Front impact test procedure Annex O (Normative) Rear impact test procedure Annex P (Normative) Dummies and calibration procedures Annex Q (Normative) Test method for buckle strength Annex R (Normative) Micro-slip test Annex S (Normative) Layout of dust test equipment Annex T (Normative) Abrasion test Annex U (Normative) Durability test method for adjusting devices Bibliography