Most modern diesel vehicles seem to have a fly-by-wire throttle. Perhaps you could ramp back the throttle signal.  A vehicle that will only idle is hard to steal but still safe.  Power steering & brakes still work, and it can limp off of the road.

Messing with the actual injection system seems problematic.  There are many different kinds.  Of the two I understand in some detail, the common rail systems would require intervention at each injector and the inline pump (Bosch) diesels would require intervention at the fuel metering rod.

...Alan

-----Original Message-----
From: pic microcontroller discussion list [mailto:PICLIST@MITVMA.MIT.EDU] On Behalf Of Roland
Sent: Wednesday, June 23, 2004 3:16 AM
To: PICLIST@MITVMA.MIT.EDU
Subject: [EE:] Diesel engine cutout 2
Thanks for the replies;

The application is retrofitting an alarm system on security vehicles, mostly toyota sprinters. The current alarm system is problematic, and needs to be re-designed.

Part of the design is to "gradually" stall the vehicle by shutting the supply for a few milliseconds at a time.

I would like to simply provide relay contacts for them to use on the injector pump(as suggested), but my concern is if units are installed on the latest diesel vehicles, that the engine management will shut the vehicle down if it runs erratically, and it would have to visit the service centre to re-set. is this a likely scenario?


Regards
Roland Jollivet

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