Multi-point intrusion side impact method for the child restraint system and dummy injury

doi:10.3969/j.issn.1674-8484.2023.01.005

Abstract

Abstract:

A multi-point intrusion sled side impact test method was proposed for Child Restraint System (CRS) to reproduce the intrusion on the different parts of door in real vehicle collisions. The method was verified with the real vehicle tests. Using this test method, sled side impact tests were carried out many times to investigate the relationship between the children head injury and the installation modes, the installation directions of the CRS, and the different sizes of child dummies. The results show that the dummy head injury in the ISOFIX+support leg mode is lower than that in the ISOFIX+top tether, the differences of head performance index and head resultant accelerations of the two installation modes are 25.8% and 12.4% respectively; the backward installation is more beneficial to the protection of children's head than forward installation, the differences of head performance index and head resultant accelerations of the two installation directions are 47.8% and 15.9% respectively; the head injury is negatively correlated with the size of the dummy, the larger the dummy, the smaller the head injury.

Key words: automotive safety, passive safety, side impact, child restraint system (CRS), multi-point intrusion, dummy head injury

CLC Number:

U467.3

XU Zhe, GAO Guanyu, LIU Cancan, LOU Lei. Multi-point intrusion side impact method for the child restraint system and dummy injury[J]. Journal of Automotive Safety and Energy, 2023, 14(1): 38-45.

Figures/Tables 17

References 13

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序号	组别	CRS类型	假人型号	乘坐方向	区域高度/ mm
序号	组别	CRS类型	假人型号	乘坐方向	骨盆	胸部
1	0+	提篮加底座	Q0	后	196.1	297.7
2	0+I	可360°旋转	Q1.5	后	232.7	385.6
3	0+	提篮	Q1.5	后	182.6	332.6
4	0+I	可360°旋转	Q3	正	263.5	468.3
5	0+I	可正反向安装	Q3	正	234.1	434.7
6	I+II+III	方向不可调	Q3	正	224.5	427.9
7	I+II+III	方向不可调	Q10	正	267.4	526.8
8	II+III	带靠背增高椅	Q10	正	234.5	498.0
9	0+I+II+III	可360°旋转	Q10	正	280.5	539.0
		平均值			235.1	434.5

序号	组别	CRS类型	假人型号	乘坐方向	区域高度/ mm
序号	组别	CRS类型	假人型号	乘坐方向	骨盆	胸部
1	0+	提篮加底座	Q0	后	196.1	297.7
2	0+I	可360°旋转	Q1.5	后	232.7	385.6
3	0+	提篮	Q1.5	后	182.6	332.6
4	0+I	可360°旋转	Q3	正	263.5	468.3
5	0+I	可正反向安装	Q3	正	234.1	434.7
6	I+II+III	方向不可调	Q3	正	224.5	427.9
7	I+II+III	方向不可调	Q10	正	267.4	526.8
8	II+III	带靠背增高椅	Q10	正	234.5	498.0
9	0+I+II+III	可360°旋转	Q10	正	280.5	539.0
		平均值			235.1	434.5

	颈部拉力， F_z / N	颈部弯矩， M_x / Nm	胸部位移， D / mm	合成3 ms加速度, a / g
	颈部拉力， F_z / N	颈部弯矩， M_x / Nm	胸部位移， D / mm	头部	胸部	骨盆
实车试验	351.28	-6.02	6.91	35.62	31.11	43.92
滑台试验	363.75	-5.35	7.47	36.54	32.18	41.39
误差 / %	3.55	-11.16	8.06	2.57	3.45	-5.76

	颈部拉力， F_z / N	颈部弯矩， M_x / Nm	胸部位移， D / mm	合成3 ms加速度, a / g
	颈部拉力， F_z / N	颈部弯矩， M_x / Nm	胸部位移， D / mm	头部	胸部	骨盆
实车试验	351.28	-6.02	6.91	35.62	31.11	43.92
滑台试验	363.75	-5.35	7.47	36.54	32.18	41.39
误差 / %	3.55	-11.16	8.06	2.57	3.45	-5.76

序号	车型信息	序号	车型信息
1	上汽大通G50	8	广本 FIT
2	一汽轿车NAT	9	奇瑞
3	湖北星晖 ASE-3	10	红旗
4	奇瑞捷途	11	北汽
5	东风奕炫	12	起亚
6	东风柳汽 SX5G	13	马自达
7	一汽奔腾 D357	14	广汽传祺