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Old 11-05-2009, 03:30 PM   #1
Burnout
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Default Timeline of a Car Crash

Some time stats relating to Crash tests on an XT Falcon.

http://www.lonegunman.co.uk/2009/02/...f-a-car-crash/


In designing the Falcon XT, Ford engineers set out to discover the anatomy of a car crash and found that the accident is typically over before we’re even consciously aware of it happening.

This is a reconstruction of a crash involving a stationary Ford Falcon XT sedan being struck in the driver’s door by another vehicle travelling at 50 km/h [30 mph].

0 milliseconds - An external object touches the driver’s door.

1 ms - The car’s door pressure sensor detects a pressure wave.

2 ms - An acceleration sensor in the C-pillar behind the rear door also detects a crash event.

2.5 ms - A sensor in the car’s centre detects crash vibrations.

5 ms - Car’s crash computer checks for insignificant crash events, such as a shopping trolley impact or incidental contact. It is still working out the severity of the crash. Door intrusion structure begins to absorb energy.

6.5 ms - Door pressure sensor registers peak pressures.

7 ms - Crash computer confirms a serious crash and calculates its actions.

8 ms - Computer sends a “fire” signal to side airbag. Meanwhile, B-pillar begins to crumple inwards and energy begins to transfer into cross-car load path beneath the occupant.

8.5 ms - Side airbag system fires.

15 ms - Roof begins to absorb part of the impact. Airbag bursts through seat foam and begins to fill.

17 ms - Cross-car load path and structure under rear seat reach maximum load.
Airbag covers occupant’s chest and begins to push the shoulder away from impact zone.

20 ms - Door and B-pillar begin to push on front seat. Airbag begins to push occupant’s chest away from the impact.

27 ms - Impact velocity has halved from 50 km/h to 23.5 km/h. A “pusher block” in the seat moves occupant’s pelvis away from impact zone. Airbag starts controlled deflation.

30 ms - The Falcon has absorbed all crash energy. Airbag remains in place. For a brief moment, occupant experiences maximum force equal to 12 times the force of gravity.

45 ms - Occupant and airbag move together with deforming side structure.

50 ms - Crash computer unlocks car’s doors. Passenger safety cell begins to rebound, pushing doors away from occupant.

70 ms - Airbag continues to deflate. Occupant moves back towards middle of car.
Engineers classify crash as “complete”.

150-300 ms - Occupant becomes aware of collision.

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Old 11-05-2009, 04:16 PM   #2
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Falcon XT Crash Test: http://www.youtube.com/watch?v=ib0DHmqVR4g
Includes side impact test.
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Old 11-05-2009, 04:20 PM   #3
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the fg looks tough with black stockies.
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Old 11-05-2009, 06:49 PM   #4
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Very interesting. Thanks for the link.
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Old 11-05-2009, 07:03 PM   #5
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wow lots of stuff goin on there in split seconds...amazing, people just don`t see all the hidden big buck technology that we take for granted.
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Old 12-05-2009, 12:19 AM   #6
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What/where is the "car's door pressure sensor"?

I have pulled apart dozens of doors, never seen this on BA/F's

There is a sensor in the B pillar is that what your talking about?
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Old 12-05-2009, 01:12 AM   #7
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Quote:
Originally Posted by Jastel
What/where is the "car's door pressure sensor"?

I have pulled apart dozens of doors, never seen this on BA/F's

There is a sensor in the B pillar is that what your talking about?
The Op is talking about the FG Falcon XT with side curtain airbags
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Old 12-05-2009, 04:52 PM   #8
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Technology thats been in Mercs Volvo's and Beemers for 20 or so years now. FG is not amazing, it is just normal. A normal that HOLDEN should be looking up to and working to reach.

Fantastic break down on whats happening during an accident though Great link.
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Old 12-05-2009, 11:35 PM   #9
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I thought it must have been in the new models only because I have never seen one. Looks like crashes will be more expensive now....
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Old 12-05-2009, 11:46 PM   #10
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To think most people would option a better stereo over additional airbags, mind boggling. Lets hope curtains are standard across the entire range in S2.

Great Link.
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Old 12-05-2009, 11:49 PM   #11
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interesting to see what happens at between say 70 to 100 kmph
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Old 13-05-2009, 12:43 AM   #12
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love the breakdown of it, cheers for the link.
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Old 13-05-2009, 08:43 AM   #13
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Amazing what happens before you realise it! Cars 'think' quiker than humans!!
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Old 13-05-2009, 08:45 AM   #14
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awesome timeline!
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Old 20-05-2009, 11:52 PM   #15
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the tech experts are so good now day this stuff saves so many lives
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Old 21-05-2009, 12:12 AM   #16
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Holden Commodore fails crash test
http://www.liveleak.com/view?i=fed_1242591559
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