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Figure 1(a) Three-dimensional Schematic View and Side View of the Standard Seat Assembly Indicating the Location of the Seat Belt Anchorage Points
Figure 1(b) Three-dimensional Schematic View and Side View of the Standard Seat Assembly Indicating the Location of the Lower Universal Anchorage System
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3.2 Test ConditionsFor the dynamic tests, the ambient temperature must be from 19°C to 26°C and the relative humidity from 10% to 70%. 3.3 Pre-Test Buckle Release Force MeasurementIf the belts of the restraint system are equipped with buckles, the release force of each buckle is to be measured in the following manner before commencing the dynamic tests. 3.3.1 Place the buckle assembly on a hard, level surface. 3.3.2 Apply a pullout force of 9 N to the buckle assembly in a direction that will produce maximum releasing effect, in the case of (a) A push-button-actuated buckle, at least 3.2 mm from the edge of the push-button access opening of the buckle, or (b) A lever-actuated buckle, on the centreline of the buckle lever or finger tab. 3.3.3 Measure the force required to release the buckle and determine its conformance to the requirements of Schedule 7 to the RSSRs. 3.4 Positioning of the ATD and Installation of the Restraint System for the Dynamic Test Using the Seat Belt Assembly3.4.1 In accordance with the manufacturer's instructions, place a new restraint system for infants with special needs at the centre seating position of the standard seat assembly. If the restraint system is installed by passing the motor vehicle seat belt over the system and under the ATD, attach the seat belt to the restraint system, but do not tighten it. 3.4.2 For the first test, position the Premie ATD specified in paragraph 2.4(a) according to the manufacturer's instructions and as follows: (a) With the ATD supine on a horizontal surface, and with a hand placed on its torso to prevent it from moving, lift the feet of the ATD until the legs touch the upper torso and the feet touch the head or as far as they will go. Slowly release the legs, allowing them to come to rest of their own accord. Do not return them to the flat surface. (b) Place the ATD in the restraint system so that its back is in contact with the back support of the system. Attach the belts and the upper and lower torso restraints of the system. (c) Tighten the belts and upper and lower torso restraints until a 9-N force applied using a webbing tension pull device (as illustrated in Figure 3) to the webbing at the top of each shoulder and, if applicable, to the pelvic webbing 50 mm on either side of the mid-sagittal plane of the torso pulls the webbing a distance of 7 mm away from the ATD. (d) Rotate each limb of the ATD downward in a plane parallel to its
mid-sagittal plane until the limb is in contact with a surface of
the restraint system or the standard seat assembly. The movement of
the arms must not be restricted in any but the downward direction. 3.4.3 In accordance with the manufacturer's instructions, attach the restraint system, if it is not already installed, to the standard seat assembly using the motor vehicle seat belt; attach the tether strap, if one has been provided; and tighten the seat belt and tether strap to a tension, as measured by a force gauge used on the webbing, of (a) until August 31, 2002, not less than 31 N and not more than 49 N or, at the option of the manufacturer, not less than 53.5 N and not more that 67 N; and (b) on or after September 1, 2002, not less than 53.5 N and not more
than 67 N.
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3.5 Test Procedure3.5.1 Accelerate the test platform in accordance with the requirements of subsection 3.1. 3.5.2 For restraint systems that are not car beds, measure the angle of the seat back and, for both types of systems, determine the conformance of the restraint system to the requirements of section 9 of Schedule 7 to the RSSRs. 3.5.3 Depending on the mass range for which the restraint system
is designed, the dynamic test procedure must be repeated with a new
restraint system and in accordance with the requirements of section
3 using a newborn infant, a 6-month-old infant, or a 9-month-old infant
ATD, as specified in paragraph 2.4(b). 3.6 Positioning of the ATD and Installation of the Restraint System for the Dynamic Test Using the Lower Universal Anchorage System3.6.1 Place a new restraint system for infants with special needs at the centre seating position of the standard seat assembly in accordance with the manufacturer's instructions. 3.6.2 For the first test, position the Premie ATD specified in paragraph 2.4(a) according to the manufacturer's instructions and as follows: (a) With the ATD supine on a horizontal surface, and with a hand placed on its torso to prevent it from moving, lift the feet of the ATD until the legs touch the upper torso and the feet touch the head or as far as they will go. Slowly release the legs, allowing them to come to rest of their own accord. Do not return them to the flat surface. (b) Place the ATD in the restraint system so that its back is in contact with the back support of the system. Attach the belts and the upper and lower torso restraints of the system. (c) Tighten the belts and upper and lower torso restraints until a 9-N force applied using a webbing tension pull device (as illustrated in Figure 4) to the webbing at the top of each shoulder and, if applicable, to the pelvic webbing 50 mm on either side of the mid-sagittal plane of the torso pulls the webbing a distance of 7 mm away from the ATD. (d) Rotate each limb of the ATD downward in a plane parallel to its
mid-sagittal plane until the limb is in contact with a surface of
the restraint system or the standard seat assembly. The movement of
the arms must not be restricted in any but the downward direction. 3.6.3 Attach the lower connectors of the restraint system to the lower universal anchorage system and the tether strap, if one has been provided, to the standard seat assembly in the following manner: (a) Adjust rigid lower connectors in accordance with the manufacturer's instructions; (b) If a tether strap has been provided, tighten it to a tension
of not less than 53.5 N and not more than 67 N, as measured by a force
gauge used on the webbing. 3.7 Test Procedure3.7.1 Accelerate the test platform in accordance with the requirements of subsection 3.1. 3.7.2 For restraint systems that are not car beds, measure the angle of the seat back and, for both types of systems, determine the conformance of the restraint system to the requirements of section 9 of Schedule 7 to the RSSRs. 3.7.3 Depending on the mass range for which the restraint system
is designed, the dynamic test procedure must be repeated with a new
restraint system and in accordance with the requirements of section
3 using a newborn infant, a 6-month-old infant, or a 9-month-old infant
ATD, as specified in paragraph 2.4(b). 3.8 Infant Restraint Systems with a Separate BaseIn the case of a system that has a separate, removable base, the seating component of which may be used without the base, (a) Where lower connectors are supplied on the base only, the tests described in subsections 3.4 and 3.5 are to be conducted for the seating component and the tests described in subsections 3.4 to 3.7 are to be conducted for the base; (b) Where lower connectors are supplied on both the base and the
seating component, the tests described in subsections 3.4 to 3.7 are
to be conducted for both the base and the seating component. |
4. |
Buckle Release Test Procedure4.1 The release force of each buckle is to be tested with the ATD retained in the restraint system and the system installed in a forward-facing direction. Depending on the mass range for which the restraint system is designed, a newborn infant, a 6-month-old infant, or a 9-month-old infant ATD, as specified in paragraph 2.4(b), must be positioned in the system in accordance with the manufacturer's instructions and the requirements of subsection 3.4.2. 4.2 The buckle release force is to be tested as follows: (a) For systems that are not car beds, tie a self-adjusting sling to the wrists and ankles of the ATD, as illustrated in Figure 4. For car beds, use the self-adjusting sling illustrated in Figure 5. (b) While applying a pullout force of 9 N to the buckle assembly in a direction that will produce maximum releasing effect, pull the sling horizontally and parallel to the SORL of the standard seat assembly with a force of 90 N if the system is not a car bed. For car beds, pull the sling vertically with a force of 90 N. Note: If the restraint system is equipped with a T-shield, a force equivalent to its mass must be added to the pullout force. Any shield, if present, may be adjusted to facilitate application of the pullout force, provided that the harness tension is not significantly affected. (c) In order to determine the buckle's conformance to the requirements of section 7 of Schedule 7 to the RSSRs, apply the specified force in a direction that will produce maximum releasing effect, in the case of (i) A push-button-actuated buckle, at least 3.2 mm from the edge of the push-button access opening, or (ii) A lever-actuated buckle, on the centreline of the buckle lever or finger tab. (d) If the force required to release the buckle exceeds the requirements of Schedule 7 to the RSSRs, release the harness tension and apply a force of 22 to 44 N to the lowest accessible part of the tongue 2 to 4 times in each of four directions at 90-degree angles to each other. (e) Repeat paragraphs (b) and (c) above while applying a pullout force on the buckle assembly of 22 N, re-orienting the direction of the sling pull force if necessary so that the arms of the ATD do not load the shield. (f) If the buckle does not release at the force specified in Schedule
7 to the RSSRs, repeat paragraphs (b) and (c) once again using a
pullout force of 44 N. |
5. |
Energy Absorbing Material Test Procedure5.1 Prepare and test specimens of energy absorbing material in accordance with the applicable 25% compression-deflection test described in one of the following American Society for Testing and Materials (ASTM) Standards: - Standard Specification for Flexible Cellular MaterialsSponge or Expanded Rubber, Designation No. D 1056-91; - Standard Specification for Flexible Cellular MaterialsVinyl Chloride Polymers and Copolymers (Open-Cell Foam), Designation No. D 1565-81 (Reapproved 1990); or - Standard Test Methods for Flexible Cellular MaterialsSlab, Bonded, and Molded Urethane Foams, Designation No. D 3574-95. 5.2 Determine the conformance of the test specimens to the requirements of section 5 of Schedule 7 to the RSSRs. |
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