Consultants say interference in vehicle electronics is possible
in [Technical]
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From: Obveeus on 25 Mar 2010 11:58 "Scott Dorsey" <kludge(a)panix.com> wrote: > It's a lot easier to find odd conditions with code reviews and > verification > than with exhaustive testing. But it's also very, very expensive. In this case, I doubt it. In my opinion, the fault (if one exists) is much more likely with the electronic hardware platform than with the software running on it. You can test the code all you want, but it won't be until that 'race condition' or similar problem is found in the hardware that the engineers can even begin to understand why the process doesn't act as expected.
From: cuhulin on 25 Mar 2010 13:34 Toyota warned dealers of crash risk in 2007 http://www.libertypost.org/cgi-bin/readart.cgi?ArtNum=286321 cuhulin
From: TE Cheah on 25 Mar 2010 18:00 15 yr ago I read of 1 car in USA using auto cruise control drtve past a truck using CB radio, this car @ once got unintended acceleration, this driver switched off his auto cruise & ended this problem. He told medias to warn users of auto cruise control against CB radios.
From: clare on 25 Mar 2010 20:59 On Thu, 25 Mar 2010 17:28:15 -0500, dbu'' <nospam(a)nobama.com.invalid> wrote: >In article <4babdcf1$1_2(a)news.tm.net.my>, "TE Cheah" <4ws(a)gmail.com> >wrote: > >> 15 yr ago I read of 1 car in USA using auto cruise control drtve >> past a truck using CB radio, this car @ once got unintended >> acceleration, this driver switched off his auto cruise & ended this >> problem. He told medias to warn users of auto cruise control >> against CB radios. > >Maybe fifteen years ago, but EMI suppression has advanced since then in >the automotive industry and many other industries too. There was ONE model of cruise control I heard about that was extra-fussy about CB Radio interference and IIRC it was OK with a 4 watt unit installed in the vehicle, but a 100 watt Linear amp in a vehicle within a couple hundred feet could "jam" it. Those cruise control units were VERY primitive compared to anything on the market today. The affected unit was made by ARA if I remember correctly and the problem only occurred if using the engine speed sensor option instead of the magnets on the driveshaft - and that was closer to 20 or 25 years ago (very early 1980s - early Chevy Citation comes to mind.
From: Scott Dorsey on 25 Mar 2010 21:06
In article <4babdcf1$1_2(a)news.tm.net.my>, TE Cheah <4ws(a)gmail.com> wrote: >15 yr ago I read of 1 car in USA using auto cruise control drtve >past a truck using CB radio, this car @ once got unintended >acceleration, this driver switched off his auto cruise & ended this >problem. He told medias to warn users of auto cruise control >against CB radios. It's not just cruise control... there are a huge number of trucks out on the road that are violating the FCC emission regulations by three orders of magnitude. Consequently anything that isn't very carefully shielded with proper grounding design can have serious problems. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |