Go Back   Jeep Garage - Jeep Forum > Jeep Platform Discussion > Grand Cherokee - WK2 - > Export Grand Cherokee 2011+

Join Jeep Garage Today
Reply
 
Thread Tools Display Modes
 
  #193  
Old 03-28-2014, 02:45 AM
Benn0's Avatar
Premium Member
 
Join Date: Oct 2013
Location: Brisbane, Australia
Posts: 800
Thanks: 6
Thanked 39 Times in 34 Posts
Rep Power: 15810
Benn0 has a reputation beyond reputeBenn0 has a reputation beyond reputeBenn0 has a reputation beyond reputeBenn0 has a reputation beyond reputeBenn0 has a reputation beyond reputeBenn0 has a reputation beyond reputeBenn0 has a reputation beyond reputeBenn0 has a reputation beyond reputeBenn0 has a reputation beyond reputeBenn0 has a reputation beyond reputeBenn0 has a reputation beyond repute
Garage
Re: Is DPF issue for 2014 CRD fixed now?

The jeep dpf is an active regen system. It actively injects diesel and EGR gas into the exhaust to increase heat. It will perform some passive regen from normal exhaust temps, but the regen alert that comes up indicates an active regen.

Not sure about the VW system.
__________________

__________________
MY14 Grand Cherokee LTD CRD - Deep Cherry Red
Status: Delivered 6th May 2014 - Mod time
Reply With Quote
  #194  
Old 03-28-2014, 02:48 AM
Benn0's Avatar
Premium Member
 
Join Date: Oct 2013
Location: Brisbane, Australia
Posts: 800
Thanks: 6
Thanked 39 Times in 34 Posts
Rep Power: 15810
Benn0 has a reputation beyond reputeBenn0 has a reputation beyond reputeBenn0 has a reputation beyond reputeBenn0 has a reputation beyond reputeBenn0 has a reputation beyond reputeBenn0 has a reputation beyond reputeBenn0 has a reputation beyond reputeBenn0 has a reputation beyond reputeBenn0 has a reputation beyond reputeBenn0 has a reputation beyond reputeBenn0 has a reputation beyond repute
Garage
Re: Is DPF issue for 2014 CRD fixed now?

This VW Jetta regen description does sound similar to the Jeep system:
VW Audi DPF filter FAQ with DPF problems like clogging and why you can't do a DPF bypass or DPF delete with a kit
__________________

__________________
MY14 Grand Cherokee LTD CRD - Deep Cherry Red
Status: Delivered 6th May 2014 - Mod time
Reply With Quote
  #195  
Old 03-28-2014, 04:50 AM
Member
My Jeep: 2014 3.0L WK2
 
Join Date: Mar 2013
Location: Brisbane QLD Australia
Posts: 705
Thanks: 13
Thanked 25 Times in 22 Posts
Rep Power: 1990
iboughtajeep has a reputation beyond reputeiboughtajeep has a reputation beyond reputeiboughtajeep has a reputation beyond reputeiboughtajeep has a reputation beyond reputeiboughtajeep has a reputation beyond reputeiboughtajeep has a reputation beyond reputeiboughtajeep has a reputation beyond reputeiboughtajeep has a reputation beyond reputeiboughtajeep has a reputation beyond reputeiboughtajeep has a reputation beyond reputeiboughtajeep has a reputation beyond repute
Quote:
Originally Posted by Benn0 View Post
Interesting, it mentions the fan running, even after car is off..... we had that happen a few weeks ago after a 2 hr drive. We thought something was up with the car..... might have been a regen?
__________________
2014 Maximum Steel Overland, but the misses won't let me drive it!
Reply With Quote
  #196  
Old 03-28-2014, 05:04 AM
Barboots's Avatar
Premium Member
My Jeep: 2014 3.0L WK2
 
Join Date: Aug 2013
Location: Perth, Western Australia
Posts: 979
Thanks: 8
Thanked 63 Times in 52 Posts
Rep Power: 2160
Barboots has disabled reputation
Re: Is DPF issue for 2014 CRD fixed now?

Isn't that pretty standard for cars with thermo fans when shut down at high temperatures? Our benzene'r does it when it's stinking hot.

Cheers,
Steve
__________________
2014 Overland CRD
Perth, Western Australia
Reply With Quote
  #197  
Old 03-28-2014, 05:08 AM
Member
My Jeep: 2014 3.0L WK2
 
Join Date: Mar 2013
Location: Brisbane QLD Australia
Posts: 705
Thanks: 13
Thanked 25 Times in 22 Posts
Rep Power: 1990
iboughtajeep has a reputation beyond reputeiboughtajeep has a reputation beyond reputeiboughtajeep has a reputation beyond reputeiboughtajeep has a reputation beyond reputeiboughtajeep has a reputation beyond reputeiboughtajeep has a reputation beyond reputeiboughtajeep has a reputation beyond reputeiboughtajeep has a reputation beyond reputeiboughtajeep has a reputation beyond reputeiboughtajeep has a reputation beyond reputeiboughtajeep has a reputation beyond repute
Quote:
Originally Posted by Barboots View Post
Isn't that pretty standard for cars with thermo fans when shut down at high temperatures? Our benzene'r does it when it's stinking hot.

Cheers,
Steve
Yeah, sorry, should have explained myself a little better. It was a prolonged period. Went for at least 5 min. Never had a thermo fan stay on that long after switching the car off.
__________________
2014 Maximum Steel Overland, but the misses won't let me drive it!
Reply With Quote
  #198  
Old 03-29-2014, 05:44 PM
Premium Member
 
Join Date: May 2012
Posts: 127
Thanks: 14
Thanked 10 Times in 9 Posts
Rep Power: 920
200sxr is on a distinguished road
Re: Is DPF issue for 2014 CRD fixed now?

Quote:
Originally Posted by Futuresystem View Post
Bring on a dpf bypass kit somebody, pleeeaaase!
I wonder what is the legality of removing the DPF? I guess it is part of the emission system and any tampering of the emission system can carry a hefty fine from the EPA even though it is not needed to achieve the current Australian emission standard.

Plus diesel particulate is known to be carcinogenic.
__________________
Aerodynamics are for people who can't build engines - Enzo Ferrari
Reply With Quote
  #199  
Old 03-29-2014, 06:57 PM
Futuresystem's Avatar
Member
My Jeep: 2014 3.0L WK2
 
Join Date: Mar 2014
Location: Brisbane Australia
Posts: 32
Thanks: 0
Thanked 2 Times in 2 Posts
Rep Power: 247
Futuresystem has a reputation beyond reputeFuturesystem has a reputation beyond reputeFuturesystem has a reputation beyond reputeFuturesystem has a reputation beyond reputeFuturesystem has a reputation beyond repute
Re: Is DPF issue for 2014 CRD fixed now?

Quote:
I wonder what is the legality of removing the DPF? I guess it is part of the emission system and any tampering of the emission system can carry a hefty fine from the EPA even though it is not needed to achieve the current Australian emission standard.
Definitely not legal. I wouldn't dream of tampering with it , would you believe. I'm going to be quite happy to have an expensive new vehicle which doesn't pollute, (because it doesn't run )
Funny, my wife's 2 year i30 diesel doesn't have a DPF (thank goodness), and I've never seen even a wiff of smoke from the exhaust. Modern common rail diesels are dramatically cleaner than old tech diesels anyway, even without the DPF. The very high fuel pressure atomises the fuel far better, resulting in a very clean burn.

Would anybody who has DPF issues please give us as much info as possible re build date, type of driving, mileage, oil used, in fact anything at all which may be a common factor.

Cya
__________________
Reply With Quote
  #200  
Old 03-29-2014, 07:08 PM
Futuresystem's Avatar
Member
My Jeep: 2014 3.0L WK2
 
Join Date: Mar 2014
Location: Brisbane Australia
Posts: 32
Thanks: 0
Thanked 2 Times in 2 Posts
Rep Power: 247
Futuresystem has a reputation beyond reputeFuturesystem has a reputation beyond reputeFuturesystem has a reputation beyond reputeFuturesystem has a reputation beyond reputeFuturesystem has a reputation beyond repute
Re: Is DPF issue for 2014 CRD fixed now?

Quote:
It actively injects diesel and EGR gas into the exhaust to increase heat.
Confused:
1. How can it inject EGR gas into the exhaust. EGR gas IS exhaust gas.
2. I'm pretty sure the Jeep diesel just injects extra fuel in the cylinder on the exhaust stroke, not injected into the exhaust- which is a far better, more expensive system. (That's why they say your oil level may rise- from dilution, as unburnt fuel gets past the rings.)

Watch this video (not Jeep specific) :
http://youtu.be/fNO-oUHmKXU
__________________
Reply With Quote
  #201  
Old 03-29-2014, 07:27 PM
Barboots's Avatar
Premium Member
My Jeep: 2014 3.0L WK2
 
Join Date: Aug 2013
Location: Perth, Western Australia
Posts: 979
Thanks: 8
Thanked 63 Times in 52 Posts
Rep Power: 2160
Barboots has disabled reputation
Re: Is DPF issue for 2014 CRD fixed now?

I think it's sort of the other way around. The EGR system is blocked during a DPF regeneration.

Cheers,
Steve
__________________
2014 Overland CRD
Perth, Western Australia
Reply With Quote
  #202  
Old 03-29-2014, 08:06 PM
Benn0's Avatar
Premium Member
 
Join Date: Oct 2013
Location: Brisbane, Australia
Posts: 800
Thanks: 6
Thanked 39 Times in 34 Posts
Rep Power: 15810
Benn0 has a reputation beyond reputeBenn0 has a reputation beyond reputeBenn0 has a reputation beyond reputeBenn0 has a reputation beyond reputeBenn0 has a reputation beyond reputeBenn0 has a reputation beyond reputeBenn0 has a reputation beyond reputeBenn0 has a reputation beyond reputeBenn0 has a reputation beyond reputeBenn0 has a reputation beyond reputeBenn0 has a reputation beyond repute
Garage
Re: Is DPF issue for 2014 CRD fixed now?

Quote:
Originally Posted by Futuresystem View Post
Confused:
1. How can it inject EGR gas into the exhaust. EGR gas IS exhaust gas.
2. I'm pretty sure the Jeep diesel just injects extra fuel in the cylinder on the exhaust stroke, not injected into the exhaust- which is a far better, more expensive system. (That's why they say your oil level may rise- from dilution, as unburnt fuel gets past the rings.)

Watch this video (not Jeep specific) :
Understanding Diesel DPF Regeneration - YouTube
1. Yes EGR takes exhaust gas, cools it down, then pumps it back into the cylinder to burn it. The gas is high proportion NOx, which just also happens to be a catalyst for soot burn off in the DPF. So the ECU pumps the cooled EGR into the exhaust system as a catalyst for the burn.

2. Yes, it does post injection, but effectively it ends up in the exhaust, which increases the heat.

Here is a good explanation pulled from a service handbook:

The DPF uses a silicon carbide wall-flow monolith with a platinum coating to trap particulates. The monolith contains a large number of square parallel channels, which run in the axial direction and are separated by thin porous walls. The channels are alternatively open at one end, but plugged at the other. The exhaust gases flow through the walls and escape through pores in the wall material. Particulates, however, are to large to escape and are trapped in the monolith walls. The ECM starts the regeneration of the DPF if the soot load exceeds a performance map value. The ECM determines the load condition of the DPF. A pressure differential sensor provides the pressure input to the ECM. During the regeneration process, the ECM raises the temperature in the DPF to burn off the soot accumulated. Under normal operation, the engine does not produce enough heat to oxidize the soot inside the DPF. This process requires temperatures above 1022 fahrenheit. The ECM activates the following inputs to generate more heat and increase the exhaust gas temperature:
- EGR throttle valve
- Injectors for post injection
- Glow plugs

The ECM uses the DPF differential pressure sensor along with many other inputs to monitor the state of the exhaust emmission system. The (ECM) will set DTCs and may illuminate the MIL to alert the driver of faults within the system.
__________________
MY14 Grand Cherokee LTD CRD - Deep Cherry Red
Status: Delivered 6th May 2014 - Mod time
Reply With Quote
  #203  
Old 03-29-2014, 08:14 PM
Barboots's Avatar
Premium Member
My Jeep: 2014 3.0L WK2
 
Join Date: Aug 2013
Location: Perth, Western Australia
Posts: 979
Thanks: 8
Thanked 63 Times in 52 Posts
Rep Power: 2160
Barboots has disabled reputation
Re: Is DPF issue for 2014 CRD fixed now?

Where did you source that EGR is used to assist the burn Benn0? I haven't seen that during my reading.

Cheers,
Steve
__________________
2014 Overland CRD
Perth, Western Australia
Reply With Quote
  #204  
Old 03-29-2014, 08:46 PM
Benn0's Avatar
Premium Member
 
Join Date: Oct 2013
Location: Brisbane, Australia
Posts: 800
Thanks: 6
Thanked 39 Times in 34 Posts
Rep Power: 15810
Benn0 has a reputation beyond reputeBenn0 has a reputation beyond reputeBenn0 has a reputation beyond reputeBenn0 has a reputation beyond reputeBenn0 has a reputation beyond reputeBenn0 has a reputation beyond reputeBenn0 has a reputation beyond reputeBenn0 has a reputation beyond reputeBenn0 has a reputation beyond reputeBenn0 has a reputation beyond reputeBenn0 has a reputation beyond repute
Garage
Re: Is DPF issue for 2014 CRD fixed now?

That's from the daimler chrysler diesel handbook, so perhaps it is outdated, but I'm assuming they have applied the same system on the VM, perhaps they haven't:

Swirl motor emulator - a UK solution? - Page 6 - Chrysler 300C Forum: 300C & SRT8 Forums
__________________

__________________
MY14 Grand Cherokee LTD CRD - Deep Cherry Red
Status: Delivered 6th May 2014 - Mod time
Reply With Quote
Reply

Tags
2014

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
' SERV 4WD' beach driving issue fixed?? (TSB in) UNCjeepWK2 Grand Cherokee - WK2 - 6 04-30-2013 10:19 PM
2014 Grand Cherokee CRD / 2014 Touareg CRD LJS8510 Diesel Powered 2012+ Export Grand Cherokee 6 04-11-2013 11:19 PM
RHR 730 with CHR550 - backup camera issue fixed lakercr Audio/Visual/Navigation 24 02-16-2013 04:11 PM
'04 WJ 2.7 CRD not starting - SKIM or other issue?? arievanbekkum Troubleshooting/Problems 22 01-27-2013 08:06 AM
Heater issue on 2005 GC CRD. Surfer01 Troubleshooting/Problems 5 01-02-2013 05:51 AM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 04:43 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Copyright 2012 - JeepGarage.Org
The Jeep Grand Cherokee Owners Community