dpf regen and satnav

steadvex · Oct 8th, 2017, 14:14

Yesterday proudly driving into the city in my hybrid, turning off energy save, realised the battery is still charging and the engine won't turn off.

Car had decided to regen the dpf just before leaving the motorway!

I wasn't using the satnav...however it got me wondering, does the satnav talk to the car to say hay, i got 100 miles of motorway now shall i burn off the soot?

Guessing it doesn't, no idea how to find out, just wondered if anyone has an idea on it?

SwissXC90 · Oct 8th, 2017, 14:38

The engine management system records the conditions of engine operation and records the amount of soot generated for the current operating conditions.

Engine temperature and ambient temperature, engine load conditions and engine speed all affect the quantities of soot generated.

Once the calculated soot amount reaches a certain level, DPF Regen is initiated.

The engine management system does not know what your journey is or will be, and thus this is not taken into account when initiating DPF Regen.
Reason: any journey can change, and any owner can avoid motorways for months on end. So motorways and long journeys, whilst ideal for DPF Regen, can not be predicted to occur and thus DPF Regen must also be possible without a motorway run.

steadvex · Oct 8th, 2017, 14:52

I know normally it wouldn't know, but if you were using the satnav it would be great if say your on a section of motorway that has no exit for 50 miles satnav pinged the ecu to kick off a regen if the filter is over a certain % full, still work as normal, but have certain ideal conditions that could set it off to minimizes city regen if at all possible

Oct 8th, 2017, 14:14	#1
steadvex Master Member Last Online: Jul 30th, 2023 19:01 Join Date: Dec 2008 Location: cardiff View Photos By: steadvex	dpf regen and satnav Yesterday proudly driving into the city in my hybrid, turning off energy save, realised the battery is still charging and the engine won't turn off. Car had decided to regen the dpf just before leaving the motorway! I wasn't using the satnav...however it got me wondering, does the satnav talk to the car to say hay, i got 100 miles of motorway now shall i burn off the soot? Guessing it doesn't, no idea how to find out, just wondered if anyone has an idea on it?

Oct 8th, 2017, 14:38	#2
SwissXC90 Premier Member Last Online: Mar 20th, 2024 18:26 Join Date: Jan 2016 Location: Cross Country	The engine management system records the conditions of engine operation and records the amount of soot generated for the current operating conditions. Engine temperature and ambient temperature, engine load conditions and engine speed all affect the quantities of soot generated. Once the calculated soot amount reaches a certain level, DPF Regen is initiated. The engine management system does not know what your journey is or will be, and thus this is not taken into account when initiating DPF Regen. Reason: any journey can change, and any owner can avoid motorways for months on end. So motorways and long journeys, whilst ideal for DPF Regen, can not be predicted to occur and thus DPF Regen must also be possible without a motorway run. __________________ XC90 R-Design MY2009, Black Sapphire Metallic. HP-Sound, RSE, Nav, Tel, ParkingCam, BLIS, ParkingHeater, RestHeat, Removable Towbar, Summer: CRATUS 20x8 on Pirelli Scorpion Zeros 255/45, Winter: NEPTUNE 17x7 on Continental WinterContact 4x4 235/65.

Oct 8th, 2017, 14:52	#3
steadvex Master Member Last Online: Jul 30th, 2023 19:01 Join Date: Dec 2008 Location: cardiff View Photos By: steadvex	I know normally it wouldn't know, but if you were using the satnav it would be great if say your on a section of motorway that has no exit for 50 miles satnav pinged the ecu to kick off a regen if the filter is over a certain % full, still work as normal, but have certain ideal conditions that could set it off to minimizes city regen if at all possible

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