§ 571.202a Standard No. 202a; Head restraints; Mandatory applicability begins on September 1, 2009. S1. Purpose and scope. This standard specifies requirements for head restraints to reduce the frequency and severity of neck injury in rear-end and other collisions. S2 Application.

2011年1月21日 · FMVSS 202a, Head Restraints, specifies requirements for head restraints to reduce the frequency and severity of neck injury in rear end and other collisions. The standard applies to each front and rear outboard Designated Seating Position (DSP) with a head restraint, and allows head restraints to be tested either dynamically or statically.

2023年4月13日 · 本期文章简单介绍美标《FMSS202a Head restraint》中的技术要求和试验方法。 一共涉及11项技术要求/试验，可以分为“尺寸和静态性能”、“动态性能和宽度”、“非使用位置”和“高度调整极限”4大部分，其中前2部分任选其一执行，满足要求即可。 1. 头枕高度. 前排外侧头枕在至少一个调整位置的高度不低于800mm，其他外侧头枕在任何调整位置的高度不低于750mm。 为了保证头枕与车顶内饰表面、车窗和车辆结构部件之间留有足够的间隙，对于前排外侧座椅可以 …

When FMVSS No. 202, was first promulgated in 1969 it was believed that a head restraint height of 700 mm was sufficient to prevent neck hyperextension for most occupants and, therefore, mitigate whiplash injuries. However, current research indicates that whiplash may occur as a result of head and neck movement insufficient to cause hyperextension.

2021年9月17日 · 按照FMVSS202a的要求，制造商可以选择对头枕进行全尺寸校核和静态性能试验，也可以选择对头枕进行宽度校核与动态碰撞试验。 但是一般来说制造商们会更偏向于选择前者，因为相对动态碰撞实验，静态实验条件简单，可控性好，实验更容易满足。 FMVSS202a之所以增加后碰实验的选项，主要有两个目的： 首先相对静态实验，动态碰撞实验更能反应实际事故中座椅的表现。 另外更重要的一点是，NHTSA认为主动式头枕（Active Headrestraint）可以最大 …

Restraints (FMVSS No. 202). The standard, which seeks to reduce whiplash injuries in rear collisions, currently requires head restraints for front outboard designated seating positions in passenger cars and in light multipurpose passenger vehicles, trucks and buses. To provide better whiplash protection for a wider range of occupants, this rule

(202 Final Rule: Rear head restraint means a rear seat back, or any independently adjustable seat component attached to or adjacent to a seat back, that has a height equal or greater than 700 mm, in any position of backset and height adjustment.) A. Fixed. If provided, minimum height of 750 mm above H-point. Measured with SAE J826 Manikin.

This Standard applies to MPVs, trucks and buses with a GVWR of 10,000 lbs. (4,536 kg) or less. It specifies dimensional and performance requirements for head restraints. Applicability: Read the Complete Standard. Copyright © NTEA. All rights reserved.

2023年4月7日 · 本期文章简单介绍美标《FMSS202a Head restraint》中的技术要求和试验方法。 一共涉及11项技术要求/试验，可以分为“尺寸和静态性能”、“动态性能和宽度”、“非使用位置”和“高度调整极限”4大部分，其中前2部分任选其一执行，满足要求即可。 1. 头枕高度前. 本期文章简单介绍美标《FMSS202a Head restraint》中的技术要求和试验方法。 一共涉及11项技术要求/试验，可以分为“尺寸和静态性能”、“动态性能和宽度”、“非使用位置”和“高度调整极限”4大部分，其中 …

2007年4月16日 · Federal Motor Vehicle Safety Standard (FMVSS) 202A - Head Restraints sets forth the criteria pertaining to the dimensional and safety requirements for outboard head restraints in passenger vehicles, light multipurpose vehicles, trucks, and buses.