I wasn’t worried about loss of power assist for brakes or steering. This was a 1963 Rambler station wagon and it didn’t have any of those fancy things. J Just a 3 on the tree manual transmission with overdrive. That 196 ci straight 6 wasn’t the most powerful engine on the block, either. Turning it off was a simple fix. When I pulled over and opened the hood the problem was easy to see and fix. I just took what was left and reconnected it. I don’t remember if Dad ever had that spring replaced or not.
Ghery S. Pettit From: McInturff, Gary [mailto:[email protected]] Sent: Monday, February 08, 2010 11:42 AM To: Pettit, Ghery; [email protected] Subject: RE: [PSES] Agency Probes Gas Pedals' Link to EMI Make it two, going fast on a straight but short piece of road, and accelerating as we were going up hill. Took my foot of the gas to begin slowing for a sharp curve and discovered the car was having none of this slowing down stuff. My brother-in-law and I spent the next few seconds analsing we were going to do. We just knew we couldn’t turn the car off, but didn’t want to just hit neutral and let the engine rev out of control. We opted to turned ignition, but not the accessories et al, off because we didn’t want to put it in neutral and blow the engine up. The car was much harder to control because of the loss of hydraulic assist to the steering wheel and the brakes but as long as we got stopped before the turn we weren’t planning on any course corrections anyway. We could get good brake responses as long as we applied and didn’t release the brake petal – and backed it up with the emergency – or parking brake. Once the decision was made it was really kind of uneventful to bring it to a stop and then get it off the road. Oddly different responses. Up front we were all congratulations and smiles because we figured it all out like the manly men we were. The back seat filled with wives and children was somewhat different. Gary McInturff 208 635 8306 ________________________________ From: Pettit, Ghery [mailto:[email protected]] Sent: Monday, February 08, 2010 11:05 AM To: [email protected] Subject: Re: [PSES] Agency Probes Gas Pedals' Link to EMI Good question about the relative reliability of mechanical throttle linkages. I remember having the throttle return spring break when I was in high school (a loooooong time ago). It happened when I was shifting gears while accelerating. As quickly as I realized what was happening, I turned off the ignition. Some of these new cars might not be so simple. But, in the 40+ years I’ve been driving, that has happened exactly once. Ghery S. Pettit From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Monday, February 08, 2010 10:57 AM To: [email protected] Subject: Re: [PSES] Agency Probes Gas Pedals' Link to EMI It might be wise to design a circuit which over-rides the accelerator whenever the brake pedal is depressed. That over-ride circuit could be made fault tolerant through redundancy, but at some level of disturbance no electronic circuit is likely to be fault-tolerant. Mechanically linked throttles were also known to stick, sometimes due to weather. I wonder if the failure rates of those are comparable to the electronic versions. _______________________________________ _____________________________________________ Ralph McDiarmid | Schneider Electric | Renewable Energies Business | CANADA | From: John Woodgate <[email protected]> To: [email protected] List-Post: [email protected] List-Post: [email protected] List-Post: [email protected] Date: 02/06/2010 02:55 AM Subject: Re: [PSES] Agency Probes Gas Pedals' Link to EMI ________________________________ In message <c7927e83.658c2%[email protected]>, dated Sat, 6 Feb 2010, Ken Javor <[email protected]> writes: >But that's like saying, yes it is possible that it will rain in Death >Valley, when inquiring if damage to a domicile might have been caused >by a hurricane. I was pointing out that the question demanded such a response and was therefore not the right question. > >The real question, given present automotive EMI standards, is "What is >the probability that a real world threat exceeded the stress levels >imposed during radiated susceptibility qualification (which runs 100 >V/m or higher to my knowledge)?" Yes, that's close enough to the right question. I'm not familiar with the European requirements, which are embodied in the Automotive Directive, not in standards. But I understand that they are very stringent. A few significant problems were experienced prior to the Directive, some involving rural roads exposed to very high RF field strengths from nearby broadcast transmitters. Nevertheless, no amount of testing, however stringent and well-implemented, can foresee all possibilities, because the micro-environment in the vehicle can be affected by the owner. For example, a metal box without a lid might act as a resonant cavity and produce a local highly-intensified field strength close to an electronics box hidden behind a side panel of the vehicle interior. -- OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK I should be disillusioned, but it's not worth the effort. - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc <http://www.ieeecommunities.org/emc-pstc> Graphics (in well-used formats), large files, etc. can be posted to that URL. 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To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at http://www.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher <[email protected]> David Heald <[email protected]> - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at http://www.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. 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