Advertise on DISCO3.CO.UK
Forum · Gallery · Wiki · Shop · Sponsors
DISCO3.CO.UK > Technical (D3)

EGR Blanking detection method
Post Reply  Down to end
Page 1 of 2 12>
Pete K
 


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

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3
EGR Blanking detection method

Out of interest, I just wondered if anyone knew how the ecu detects the egr's have been blanked?


I found this example from a petrol, which show conditions under which the egr flow is tested

Engine at normal operating temperature;
normal, varied driving for 3 minutes; then
decel. / accel. 50 – 60 mph (80 – 95 km/h),
within 6 seconds between 1700 – 2050 rpm


I guess it could look at MAF MAP data when the EGR is opened and looks for a change?

I saw a light come on, on decel coming off motorway



P.S does anyone know what size hole you put in an EGR blank plate to fool the the detection method? Whistle
  
Post #207258931st Jul 2019 5:24 pm
View user's profile Send private message View poster's gallery Reply with quote
PROFSR G
 


Member Since: 06 Mar 2017
Location: Lost
Posts: 4580

Ukraine 2009 Discovery 3 TDV6 Commercial XS Auto Stornoway GreyDiscovery 3

On EU4 is it not meassured at the EGR itself?
 yµ (idµ - eAµ) ψ=mψ

 
 
Post #20726941st Aug 2019 1:07 am
View user's profile Send private message View poster's gallery Reply with quote
gstuart
 


Member Since: 21 Oct 2016
Location: kent
Posts: 13576

United Kingdom 2005 Discovery 3 TDV6 Base 7 Seat Auto Java BlackDiscovery 3
Re: EGR Blanking detection method

Pete K wrote:
Out of interest, I just wondered if anyone knew how the ecu detects the egr's have been blanked?


I found this example from a petrol, which show conditions under which the egr flow is tested

Engine at normal operating temperature;
normal, varied driving for 3 minutes; then
decel. / accel. 50 – 60 mph (80 – 95 km/h),
within 6 seconds between 1700 – 2050 rpm


I guess it could look at MAF MAP data when the EGR is opened and looks for a change?

I saw a light come on, on decel coming off motorway



P.S does anyone know what size hole you put in an EGR blank plate to fool the the detection method? Whistle


Hi Pete

Had a look and there saying a 10mm hole , enclosed the link as well for u Thumbs Up

https://www.ebay.co.uk/itm/LAND-ROVER-DISC...SwmtJXW~Ih

I also thought the egr PCM uses the MAP sensor to control the egr

Plus some handy dates , don’t know if there accurate

Euro 2 January 1996 – January 2000,
Euro 3 January 2000 – January 2005,
Euro 4 January 2005 – September 2009,
Euro 5 September 2009 – September 2014,
Euro 6 September 2014 On
   
Post #20726961st Aug 2019 1:15 am
View user's profile Send private message View poster's gallery Reply with quote
gstuart
 


Member Since: 21 Oct 2016
Location: kent
Posts: 13576

United Kingdom 2005 Discovery 3 TDV6 Base 7 Seat Auto Java BlackDiscovery 3

PROFSR G wrote:
On EU4 is it not meassured at the EGR itself?


Hi buddy , hope ur keeping well

Wondering if the EGRs PCM also uses the MAP, throttle position sensor and engine speed sensor
   
Post #20726971st Aug 2019 1:44 am
View user's profile Send private message View poster's gallery Reply with quote
lynalldiscovery
 


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

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

I would hazard a guess the engine ecu tells the egr when to operate and expects to see a difference in the exhaust gas content with the egr operating and when it doesnt see said difference it then flags a fault.
  
Post #20727021st Aug 2019 6:24 am
View user's profile Send private message View poster's gallery Reply with quote
Pete K
 


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

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

I didn't think there was an exhaust flow sensor.

I would only imagine such a sensor would be pointless, and prone to failure.

I suspect the ecu uses some other data, to duduce whether the EGR is working or not.

P.S Thanks GS.
  
Post #20727681st Aug 2019 11:06 am
View user's profile Send private message View poster's gallery Reply with quote
Disco_Mikey
 


Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20713

Scotland 2005 Discovery 3 TDV6 HSE Auto Cairns BlueDiscovery 3

It uses the MAF readings Thumbs Up
 My D3 Build Thread

TDV8 Retrofit Build Thread 
 
Post #20727701st Aug 2019 11:20 am
View user's profile Send private message View poster's gallery Send e-mail Reply with quote
Pete K
 


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

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

Thanks. Thumbs Up
  
Post #20727731st Aug 2019 11:38 am
View user's profile Send private message View poster's gallery Reply with quote
gstuart
 


Member Since: 21 Oct 2016
Location: kent
Posts: 13576

United Kingdom 2005 Discovery 3 TDV6 Base 7 Seat Auto Java BlackDiscovery 3

Everyday is a school day, Always thought it was the MAP sensor , live and learn Thumbs Up
   
Post #20727961st Aug 2019 1:29 pm
View user's profile Send private message View poster's gallery Reply with quote
gstuart
 


Member Since: 21 Oct 2016
Location: kent
Posts: 13576

United Kingdom 2005 Discovery 3 TDV6 Base 7 Seat Auto Java BlackDiscovery 3

So assume then the pwm signal comes from the maf sensor , Thumbs Up


Click image to enlarge
   
Post #20727971st Aug 2019 1:43 pm
View user's profile Send private message View poster's gallery Reply with quote
Disco_Mikey
 


Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20713

Scotland 2005 Discovery 3 TDV6 HSE Auto Cairns BlueDiscovery 3

PWM signal comes from the PCM Thumbs Up
 My D3 Build Thread

TDV8 Retrofit Build Thread 
 
Post #20728311st Aug 2019 4:43 pm
View user's profile Send private message View poster's gallery Send e-mail Reply with quote
gstuart
 


Member Since: 21 Oct 2016
Location: kent
Posts: 13576

United Kingdom 2005 Discovery 3 TDV6 Base 7 Seat Auto Java BlackDiscovery 3

Thks DM as always

All over my head , suppose its getting the general understanding how the system works

So is it the PCM ultimately reads the MAF then from that sends a signal from the PCM to the Egr solonoids which then control the amount of % they open or close

Sorry as always for the daft questions

Many thks Bow down
   
Post #20728441st Aug 2019 5:18 pm
View user's profile Send private message View poster's gallery Reply with quote
Pete K
 


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

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

The ECUs decides when to open the egrs.

Eg.
When the engine has warmed up
And
When you are driving along
And
When the revs are between x and y

You get the idea
  
Post #20728481st Aug 2019 5:25 pm
View user's profile Send private message View poster's gallery Reply with quote
gstuart
 


Member Since: 21 Oct 2016
Location: kent
Posts: 13576

United Kingdom 2005 Discovery 3 TDV6 Base 7 Seat Auto Java BlackDiscovery 3

Perfect thks Pete ,

Bless u as always Bow down
   
Post #20728561st Aug 2019 5:52 pm
View user's profile Send private message View poster's gallery Reply with quote
lynalldiscovery
 


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

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

Pete K wrote:
I didn't think there was an exhaust flow sensor.

I would only imagine such a sensor would be pointless, and prone to failure.
I suspect the ecu uses some other data, to duduce whether the EGR is working or not.

P.S Thanks GS.


Welcome to the world of Euro6 trucks and soon to be your headache Euro6 cars Mr. Green
  
Post #20728761st Aug 2019 8:07 pm
View user's profile Send private message View poster's gallery Reply with quote
Display posts from the last:  
Post Reply Back to top
Page 1 of 2 12>
Jump to:  
Previous Topic | Next Topic >


Posting Rules
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum



DISCO3.CO.UK Copyright © 2004-2024 Futuranet Ltd & Martin Lewis
DISCO3.CO.UK RSS Feed - All Forums

DISCO3.CO.UK is independent and not affiliated to Land Rover.
Switch to Mobile Site