>Similar systems have been built into some commercial vehicles security
>systems.  Don't know exactly how they are implemented but have seen some
>operating.  They worked with proximity switching.  A box on the operators
>belt must be within a certain distance of the vehicle.  Too far away and
>vehicle/equipment shuts down.  There was remote start and shutdown on the
>box as well as an ignition style switch.
>Personally I think a remote like this transmitting to a solenoid valve on
>the input side of the fuel pump would be a nice touch.  Within range and
>engine gets fuel, step off too far and the fuel pump gets no fuel.  Or
>possibly same idea but to a control relay supplying power to the fuel pump.

It'd have to actually turn the fuelpump off; if it's running but
starved of fuel, that will damage it rapidly, as fuel is the pump's
only lubricant and coolant.
--
Andrew Grebneff
Dunedin
New Zealand
Fossil preparator
<andrew.grebneff@stonebow.otago.ac.nz>
Seashell, Macintosh, VW/Toyota van nut

HUMANITY: THE ULTIMATE VON NEUMANN MACHINE

DEMOCRACY: RULE BY THE LOWEST COMMON DENOMINATOR