I thought ALL diesels were "direct inject"!!!!!! If you didn't direct inject, how on earth would you control the timing of "ignition" (flashpoint of the fuel)!! FYI! ;-) Dennis Brent Brown wrote: >On 25 May 2004 at 15:32, Falcon Wireless Tech Support wrote: > > > >>----- From: "Bob Japundza" > >> >> >>>I have a friend that just bought a 2004 GMC 2500 diesel pickup. The >>> >>> >>engine controller uses a 32-bit microprocessor, and they use that as a >>selling point. When I first heard that I thought man, throwing a >>spark and a squirt of fuel in a cylinder is getting more complex >>nowadays. I'm sure that the new 2005 emissions regulations in the US >>have something to do with that. > > Regards, > Bob >> >>Actually, you seem to be overlooking the fact that a DIESEL engine >>does not even require a spark. To the best of my knowledge even the >>"squirt of fuel" is a mechanical function carried out by the diesel >>injection pump, the timing of which must be at an exact point in the >>pistons compression stroke. So basically the on-board computer has >>little to do with running the engine on a diesel. >> >>$.02KF4HAZ - Lonnie >> >> >> > >I understand some new diesels are "direct inject", which means they use >electro-mechanical injectors to squirt the diesel directly into the cylinder. The >timing then becomes just as critical as it is with a spark ignited petrol engine. >The fuel metering is obviously just as important too, so the ECU would have >pretty much the same amount of work to do as in a petrol engine. > >$0.02 (times 0.62 for current exchange rate ;-)) > >Brent > >-- >Brent Brown, Electronic Design Solutions >16 English Street, Hamilton, New Zealand >Ph/fax: +64 7 849 0069 >Mobile/txt: 025 334 069 >eMail: brent.brown@clear.net.nz > >-- >http://www.piclist.com hint: To leave the PICList >mailto:piclist-unsubscribe-request@mitvma.mit.edu > > > -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu