Do you target design heel point for the static dimensionals? For FMVSS a compliance, the H-point is conducted in vehicle, so the. Heel point is not recorded. FMVSS a Alternative. Dynamic Test. Examine field performance of Volvo. WHIPS seats versus performance in. NHTSA’s dynamic tests.. Functional. ☆4 Re-Active Systems tested. ☆Test Set-up. – Seats positioned according to FMVSS a. – Seats tested on sled. – Peak head-torso rotation measured within.

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This document reopens the comment period for a notice of proposed rulemaking NPRM published January 28, Place a test dummy at each outboard designated seating position equipped with a head restraint.

The Agencies have also received a letter opposing any extension of the comment period.

InterRegs: 49 CFR Part a (FMVSS a) | US – Federal

We propose to permit optional early compliance with the amended requirements. Previously, the maximum allowable upward mounting angle was 15 degrees beyond vertical.

If the specified position of the H-point can be achieved with a range of seat cushion inclination angles, adjust the seat inclination such that the most forward part of the seat cushion is at its lowest position with respect to the most rearward part. If there is more than one inclination position closest to the design angle, set the seat back inclination to the position closest to and rearward of the design angle. Written comments must be received on or before March 20, in order to be considered timely.

Virtual Seat Manufacturing and Testing for FMVSS 202a Backset Prediction

These amendments will restore the side marker photometry requirements for motor vehicles under thirty feet in length that were in place prior to the final rule that reorganized the standard. All of the points on the acceleration vs.

Apply the force vector normal to the torso reference line and maintain it within 2 degrees of a vertical plane parallel to the fmvzs longitudinal centerline. The Agencies have also received a letter opposing any extension of the comment period. For adjustable restraints, the requirements of this section must be met with the top of the head restraint in any height position of adjustment between mm and mm, inclusive.


FMVSS 202a

The agency will continue to conduct research and to evaluate real-world performance of these systems through track testing and field operational testing. NHTSA is issuing this NPRM to propose a new Federal motor vehicle safety standard to enhance the rollover structural integrity of certain types of large buses generally, over-the-road buses of any weight and non-over-the-road buses with a gross vehicle weight rating GVWR greater than 11, kilograms kg 26, pounds lb.

Summary This document denies a rulemaking petition submitted by Mr. Third, we are incorporating an optional alternative compliance process for manufacturers whose helmets do not comply with the proposed dimensional and compression requirements, but do comply with the performance requirements and all other aspects of FMVSS No. You should submit your comments early enough to ensure that the docket receives them not later than February 16, Position each test dummy as specified in S The petitioner claims that the recommended changes to the relevant safety standards would allow vehicle manufacturers to better utilize the regenerator technology to increase vehicle efficiency.

When tested in accordance with S5.

We believe that, by requiring that ESC systems be installed on the rest of truck tractors and large buses, this final rule will prevent 40 to 56 percent of untripped rollover crashes and 14 percent of loss-of-control crashes.

This final rule is a deregulatory action.

NHTSA also seeks comments on the research that would be needed to determine how to amend the FMVSS in order to remove such barriers, while retaining those existing safety requirements that will be needed and appropriate for those vehicles. Adjust the front head restraint so that its top is at any height between and inclusive of mm and mm and its backset is in the maximum position other than allowed by S4. This correction removes language relating to the incorporation by reference of certain publications that was inadvertently and inappropriately included in the preamble to the proposed rule.


Petitions for reconsideration of this final rule must be received not later than March 24, The impactor and impact speed would simulate the loading from an average size unrestrained adult male impacting a window on the opposite side of a large bus in a rollover. The restraint is positioned midway between the lowest and the highest position of adjustmentand at any position of backset.

ESC systems in truck tractors and large buses are designed to reduce untripped rollovers and mitigate severe understeer 202q oversteer conditions that lead to loss of control by using automatic computer-controlled braking and reducing engine torque output.

Optional early compliance as discussed below.

Virtual Seat Manufacturing and Testing for FMVSS a Backset Prediction | ESI Group

By mandating V2V technology in all new vehicles, but not requiring specific safety applications, it is NHTSA’s belief that such capability will in turn facilitate market-driven development and introduction of a variety of safety applications, as well as mobility and environment-related applications that can potentially save drivers both time and fuel.

At each forward-facing outboard designated seating position equipped with a head restraintthe head restraint adjusted midway between the lowest and the highest position of adjustmentand at any position of backset adjustmentmust conform to the following:. In each school busa head restraint that conforms to either S4. The Agency also seeks comments from road 2022a, including vehicle drivers and passengers, cyclists and pedestrians.

If there is more than one inclination position closest to 25 degrees from the vertical, set the seat back inclination to the position closest to and rearward of 25 degrees. If the head restraint is adjustable, adjust the top of the head restraint to a position midway between the lowest position of adjustment and the highest position of adjustment.