Re: Hon'ble Minister Nitin Gadkari: "6 airbags compulsory" Quote:
Originally Posted by CARDEEP We have seen chassis that barely take the impact of 56 kmph test, there's no side + rear impact tests. How would such untested &/or unsafe chassis become safe just by adding few more air bags. In fact, I believe these vehicles will be more unsafe with proposed additions. | Quote:
Originally Posted by anb 6 airbags is pointless if the structure of the car is unstable. The decision only helps airbag manufactures. |
I'm sorry, that is simply not true.
I can find a number of models tested in other NCAPs that had reasonable to excellent performance in both MDB and pole side impact despite poor structural performance in the frontal impact, thanks to side body and head airbags. Euro NCAP: 2015 Mitsubishi L200/Triton: Quote: In the frontal offset test, there was extensive deformation of the bodyshell. There was a rupture of the floorpan in the driver's seating position, considerable buckling of the floor in the rear of the passenger compartment and spot welds had failed at the point where the bottom sill meets the C-pillar (the rearmost pillar of the passenger compartment). The car was penalised for this and Mitsubishi were precluded from demonstrating that structures in the instrument panel, such as the steering column and column shroud, would not present a risk of injury to the knees and femurs of occupants in the front seats. Protection of the knees, femurs and pelvis was rated as marginal. There was also insufficient pressure in the airbag to prevent the driver's head from bottoming-out against the steering wheel. Dummy head readings showed that contact had been made with the steering wheel through the deflated airbag and protection of the head was downgraded to adequate. In the full width rigid barrier test, protection of the driver dummy was good for all critical body areas while, for the rear passenger, protection of the neck was adequate and that of the chest was marginal. In both side impact tests - the side barrier and more severe side pole - the L200 scored maximum points, with good protection of all critical body areas. The front seats and head restraints showed good protection against whiplash injury in the event of a rear-end collision and a geometric assessment of the rear seats also indicated good whiplash protection. The L200 does not have an autonomous emergency braking system to assist further in whiplash protection.
| Latin NCAP: 2016 Nissan Murano (before front structural reinforcements) Quote:
Frontal impact: The protection offered to the driver’s head was adequate and chest protection was marginal. Passenger’s head, chest and neck protection was good. The driver’s knees showed contact just in the border of the knee airbag border and in case of a larger driver the knees could impact with dangerous structures in the dashboard. Passenger’s knees could impact with dangerous structures in the dashboard. Driver’s left tibia showed poor protection due to foot area deformation. Footwell area is unstable and not capable of withstanding further loadings. The damage exposed feet to intrusions and serious injuries. The bodyshell was rated as unstable as the windscreen loadpath and door loadpath were not able to transfer further loadings also the lower hinge of the driver door detached from the A-pillar increasing the risk of ejection and the structure showed intrusion of the firewall. Side impact: The side body and curtain airbags offered good protection to the adult in all body regions. Side Pole impact: The side body and curtain airbags helped to offer good protection to the head and the abdomen as well as pelvis however chest received marginal protection. The head curtain airbag showed a problem in the deployment at the B-pillar level. ESC test (standard equipment): The ESC was tested and its performance met the regulatory requirements of Latin NCAP.
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And an excellent case: the Ford Figo and Ka tested by Latin NCAP (similar-looking but differently-performing cars, both with poor side impact structural performance). Latin NCAP: 2017 Ford Ka + 2 airbags: 0 stars adult protection (before side structure improvements)
Stable passenger compartment in frontal impact
High structural intrusion in side impact + no side airbags: poor chest protection (hence zero stars) Quote:
Frontal impact: The driver head had adequate protection. The driver head bottomed out the airbag. Driver chest had marginal protection. The driver and passenger knees areas showed critical structures. Passenger head and neck had good protection while the chest showed adequate protection. The bodyshell was rated as stable and was capable of withstanding further loading. The footwell was stable and showed no rupture after the impact. The vehicle has Seat Belt Reminder (SBR) that meet Latin NCAP requirements for the Driver position only. The car has seatbelt pretensioner only in driver side. In the side impact the head and pelvis had good protection and, the abdomen adequate protection but chest showed poor protection directly in the dummy readings which explains the result of zero stars, the car does not have side airbags, it does not have side impact structural reinforcements in the doors and no pelvis energy absorption elements in the door or inner door panel. The car showed a high penetration of the movable barrier that caused a high displacement of the B-pillar which questions the protection capacity of the car to offer better side impact protection even when equipped with side airbags. The rear door opened during the side impact exposing the passengers to higher risks. The car is not equipped with ESC according to Latin NCAP requirements. Side pole impact test was not performed, the car does not offer side head protection airbags as standard.
| Latin NCAP: 2019 Ford Figo + 4 airbags: 4 stars adult protection
Unstable passenger compartment in frontal impact
High structural intrusion in side impact but equipped with side airbags: marginal (third-lowest) chest protection Quote:
Frontal impact: The protection offered to the driver head was adequate and passenger head received good protection. Driver and Passenger neck was good. Driver chest received marginal protection and passenger chest received good protection from the restraint systems. Driver and passenger’s knees showed marginal protection as they can impact with dangerous structures behind the dashboard. Driver and passenger’s tibias showed adequate and good protection. Footwell area was rated as stable and showed insignificant deformation. Feet protection is good. The bodyshell was rated as unstable. Side impact: The car offered good protection to head, abdomen and pelvis while chest received marginal protection. Side Pole Impact: was not performed as the car does not offer side head protection as standards. ESC: The ESC was tested and its performance met the regulatory requirements of Latin NCAP. The car offers 2 frontal SBR. All of the above explain the 4 stars for adult occupant protection.
| Press release: Quote:
It was noticed a large intrusion in the passenger compartment during the side impact test.
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Conclusions: - When NCAPs say 'stable' or 'unstable' they refer to the integrity of the passenger compartment in frontal impact.
- Frontal structural performance is not necessarily related to side-impact structural performance.
- Even in cases of inadequate side-impact structural performance, side body airbags can help prevent life-threatening injury though to a limited extent.
- It is possible to perform well in MDB (small car T-boning) side impact without side airbags, with a good side structure.
- In pole-type impacts (lampposts, trees, etc) or side impacts (T-bone) with high-riding vehicles, a robust head protection system (eg. curtain airbags or seat-mounted head airbags) would almost certainly be needed to prevent direct head contact with the intruding object and the resulting life-threatening injury.
- The homologation barrier test for side impact (AIS-099) should likely already prevent the sale of vehicles with a side structure so bad that fitting airbags would be pointless.
I still think the government should include a UN R135-equivalent pole test in the AIS standards as part of the homologation process along with this move instead of just a geometric evaluation (which I think will be the case). Quote:
Originally Posted by 84.monsoon Even other manufacturers like M&M would lose a factor they use today to differentiate their higher variants from lower variants. |
On the bright side, that will also stop manufacturers from overcharging for optional safety equipment. More often it is also bundled with other unrelated equipment. Quote:
Originally Posted by reppy mandated a minimum 3 or 4-star rating on passenger cars to improve overall safety. | Quote:
Originally Posted by condor Make the baseline a 4-star NCAP rating. | Quote:
Originally Posted by RoadTiger A minimum NCAP/ Indian NCAP score could also be a good move. |
Never going to happen, never has happened even in developed markets. No country uses a 64km/h frontal test for homologation. It's all 56km/h just like India. The high NCAP ratings are driven by intense pressure not only from private buyers but also from commercial fleets, most of whom have policies to purchase no vehicle less than five stars. Governments only have constructive dialogue with NCAPs and sometimes fund them but they are always independent of homologation.
Last edited by navin : 17th January 2022 at 11:51.
Reason: typos
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