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How many injection events per one combustion in TDV6 Euro 4
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bednar
 


Member Since: 31 Oct 2020
Location: Kraków
Posts: 7

Poland 2008 Discovery 3 TDV6 HSE Auto Unknown ColourDiscovery 3
How many injection events per one combustion in TDV6 Euro 4

Hello,

I was observing current waveforms on injectors in TDV6 2.7 Euro 4 with PicoScope. I am surprised that in each cycle I can see only 2 events (pilot and main injection). I expected to see more like 3 or 4 events in this engine.
I was measuring standing still on idle (750 rpm) and up to 2500 rpm with no load. The engine was cold after a night in garage (about 16 Celcius degrees).

Does anyone know how many events should we expect in this engine?
Is there any difference between ECUs for Euro 3 and Euro 4 in number of inection events per cycle?

Dariusz
  
Post #220491724th Jan 2021 1:52 pm
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lynalldiscovery
 


Member Since: 22 Dec 2009
Location: Maidstone
Posts: 7274

United Kingdom 2006 Discovery 3 TDV6 Metropolis LE Auto Bonatti GreyDiscovery 3

Just guessing here, but I would say 2 pre and main.
Reason being when the truck Euro5 came out we were told the injectors were capaable of 5 injections per stroke, but to meet this emissions target (E5) they only needed two.

I am sure there are tech docs on gooogle for the Lion engine.
  
Post #220496224th Jan 2021 4:20 pm
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10337

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

I think 2 is nornal for these engines
  
Post #220496924th Jan 2021 4:46 pm
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bednar
 


Member Since: 31 Oct 2020
Location: Kraków
Posts: 7

Poland 2008 Discovery 3 TDV6 HSE Auto Unknown ColourDiscovery 3

Both euro 3 and euro 4?
  
Post #220499624th Jan 2021 5:47 pm
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