On 14 Dec 2009, at 17:03, Brian on Harnser wrote: > It happens that roger_millin formulated : >> Colin wrote: >>> >>> Both my Marl 1 Zafira had and my Mark 2 Zafira has a fly by wire >>> accelerator. >> >> Yes, they are very common these days but there have to be very >> stringent >> hardware and software conditions placed upon the system to ensure >> there isn't >> a runaway. From memory, the potentiometer on the throttle pedal >> tends to have >> two tracks and the sytem constantly compares one track against the >> other to >> ensure that if one track is lying the other acts as a check and >> prevents a >> potential disaster........and that is only one piece of the >> hardware. Then >> you have the software and cabling that stand between that and the >> motor that >> drives the throttle plate. The whole engine management systems on >> cars is >> very complex these days and, hence, the opportunity for errors and >> strange >> results. Luckily the systems don't crash as often as PCs seem to >> do ;-))) >> Roger > The old cable is not fool proof. I use to have an Opal Manta with a > twin choke carb, really hammer it and the cam on the second choke > would > go over the stop and stay wide open, made slowing down difficult.
I thought slowing down was anathema to Manta drivers anyway... ;-) Are you sure it wasn't a design feature? -- Andy Greener n.b. Whisper Pangbourne, UK http://www.nb-whisper.com
