That might not go over well with some people. You know, the ones that drive with one foot on the gas and one on the brake. :-) I am beginning to think I have a more robust engine control in some of my model airplanes. I have a fiberoptics connection between the receiver and engine ignition. The radio has a failsafe set to throttle down and kill the ignition if radio signal is lost or interfered with. If the fiberoptic link is lost, it kills the ignition. If the receiver voltage is lost, it kills the ignition. Some cars (my Nissan Frontier, for example) does not lock the steering unless you turn the key off AND remove the key. I have used that feature to allow me to tow it with all wheels on the ground behind a motorhome (transmission in neutral). In an emergency, as long as I keep it in gear I can turn the ignition off and still have power steering and power brakes (engine is still turning, just the ignition is off). Not sure about other cars, though. Bob R.
--- On Mon, 2/8/10, [email protected] <[email protected]> wrote: 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 | - 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. 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]>
