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Andy Neil
12/24/05 06:16
Read: 624 times
Basingstoke
Uk


 
#105881 - Distributor-less
Responding to: Farshid Jafari Harandi's previous message
Kai said:
Each row of 4 cylinders had a group of two coils providing four outputs, each connected to a sparking plug.

Farshid Jafari Harandi said:
A total of 8 Coils for a 4 cylinder engine !

No - read again; Kai said "Each row of 4 cylinders" - it's a V8!!

Looks like a performance engine.

It's a Ferrari - what else do you expect?!

I think there's no advantage in avoiding ignition coils in future, but in avoiding the distributor!

Absolutely: the distrubutor is a mechanical component, so prone to all the wear & tear issues - especially when it's also switching HT voltages!...
I suspect that it's also difficult (ie expensive) to get the required timing accuracy?

Note that modern systems don't use a coil like the old contact-breaker types (or even the capacitor-discharge types that replaced them).
They use high-frequency switching.

So these EFI engines with ECU controlled Ignitions do use a seperate Coil for each cylinder ?

It would probably be more helpful to think of "a separate HT generator per cylinder" - or, as already noted, more likely "a separate HT generator per pair of cylinders"

How do they replace the HV distributor ?

See above - the only purpose of a distributor is to distribute(!) the HT from a single HT generator (eg, a traditional coil) amongst multiple spark plugs.
Thus, if you have (effectively) a separate HT generator for each cylinder, there is no need for a distributor!

Atleast i didn't saw something like 4 coil's in my dad's EFI equipped Peugeot ?

Did it have a distributor?

Our previous car had EFI (Electronic Fuel Injection) and electronically-controlled ignition, but still used a distributor.

List of 73 messages in thread
TopicAuthorDate
What do you guess it could be ?      Farshid Jafari Harandi      12/16/05 14:14      
   Van Der Graaff generator?      Andy Neil      12/16/05 14:27      
      Whimshurst      Farshid Jafari Harandi      12/16/05 19:08      
   Gas light      Steve M. Taylor      12/16/05 15:58      
   Sparking plug?      Kai Klaas      12/16/05 18:11      
      That's it !      Farshid Jafari Harandi      12/17/05 08:33      
         Very well dangerous...      Kai Klaas      12/18/05 07:26      
            Condenser      Farshid Jafari Harandi      12/18/05 08:45      
               Electrolytic, really?        Kai Klaas      12/19/05 10:43      
                  RE : Electrolytic, really?      Farshid Jafari Harandi      12/19/05 15:36      
                  Could my modifications be harmful ?      Farshid Jafari Harandi      12/21/05 05:41      
                     Capacitors      Steve M. Taylor      12/21/05 05:49      
                        it's always in my sight ;)      Farshid Jafari Harandi      12/21/05 09:21      
                     DCCS      Farshid Jafari Harandi      12/21/05 09:25      
                        So      Steve M. Taylor      12/21/05 10:34      
                           Specifications      Farshid Jafari Harandi      12/21/05 14:10      
                              dash      Steve M. Taylor      12/21/05 14:55      
                                 Box and remote starting      Farshid Jafari Harandi      12/21/05 22:10      
                                 Vacuum forming      Farshid Jafari Harandi      12/22/05 14:44      
                              Plastic Boxes      Jon Ledbetter      12/21/05 15:52      
                                 potting boxes      Farshid Jafari Harandi      12/21/05 22:16      
                                 Potting Boxes?      Farshid Jafari Harandi      12/22/05 14:43      
                                    Vacuum Forming      Jon Ledbetter      12/22/05 15:18      
                                       Thanks for the link      Farshid Jafari Harandi      12/22/05 15:31      
                                          Still need a nice "front"      Steve M. Taylor      12/22/05 16:52      
                                             Casing...      Farshid Jafari Harandi      12/23/05 04:56      
                                                display      Steve M. Taylor      12/23/05 09:38      
                                                   Hidden until light up      Farshid Jafari Harandi      12/23/05 11:10      
                                                      Visiting Tehran      Steve M. Taylor      12/23/05 11:17      
                                                         mail ?      Farshid Jafari Harandi      12/23/05 11:29      
                                    Laptop      Steve M. Taylor      12/23/05 03:11      
                                       Hmm...      Farshid Jafari Harandi      12/23/05 05:17      
                        Dash      Jon Ledbetter      12/21/05 10:53      
                           ...nor      Steve M. Taylor      12/21/05 11:08      
                           Covering is hard      Farshid Jafari Harandi      12/21/05 14:02      
                     Battery seems to be disconnected!      Kai Klaas      12/21/05 09:45      
                        blocking      Steve M. Taylor      12/21/05 10:37      
                        Electrical sytem      Farshid Jafari Harandi      12/21/05 14:01      
                           As I suspected...      Kai Klaas      12/22/05 07:46      
                              How to connect the second battery      Farshid Jafari Harandi      12/22/05 09:50      
                                 Err      Steve M. Taylor      12/22/05 10:22      
                                    Dual battery      Farshid Jafari Harandi      12/22/05 13:06      
                                       OOOPS      Steve M. Taylor      12/22/05 13:17      
                                 You could try this      Kai Klaas      12/22/05 18:31      
                                    RE :You could try this      Farshid Jafari Harandi      12/23/05 05:19      
                        Electrical sytem      Farshid Jafari Harandi      12/21/05 14:03      
            Neat trick      Steve M. Taylor      12/19/05 12:30      
               arcing cables      Terry Lingle      12/19/05 12:57      
                  no way      Steve M. Taylor      12/19/05 14:18      
                  Wow !      Farshid Jafari Harandi      12/19/05 15:38      
                     50,000 volts        Terry Lingle      12/19/05 22:49      
                     Switching techniques      Andy Neil      12/22/05 20:45      
                        Per Plug ?      Steve M. Taylor      12/23/05 03:10      
                           Sort of      Andy Neil      12/23/05 18:38      
                        New techniques      Farshid Jafari Harandi      12/23/05 04:55      
                           Current techniques      Andy Neil      12/23/05 18:44      
                              DC/DC Converter not dedicated coils      Farshid Jafari Harandi      12/23/05 20:54      
                           Ferrari 348      Kai Klaas      12/23/05 19:13      
                              Distributor-less      Farshid Jafari Harandi      12/23/05 20:54      
                                 Not quite      Kai Klaas      12/24/05 06:00      
                                    Look here      Kai Klaas      12/24/05 06:16      
                                       Coils      Farshid Jafari Harandi      12/25/05 01:28      
                                 Distributor-less      Andy Neil      12/24/05 06:16      
                                    Wear and tear      Kai Klaas      12/24/05 06:41      
                                       Amazing      Steve M. Taylor      12/24/05 11:58      
                                    Distributor      Farshid Jafari Harandi      12/25/05 01:28      
                                       Electrical field strengths would be huge      Kai Klaas      12/25/05 06:05      
                                          Big 'uns.      Steve M. Taylor      12/25/05 14:22      
                                             Interesting      Farshid Jafari Harandi      12/25/05 20:57      
                                                Hate to think      Steve M. Taylor      12/26/05 06:10      
                  Porosity of cables      Kai Klaas      12/21/05 09:19      
                     corona      Steve M. Taylor      12/21/05 13:54      
                        Ah, that's the right word.      Kai Klaas      12/22/05 07:14      

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