DPF regen cycle

mengele

If you can hear your car after starting a regen cycle but you arrive home and are finished with the car, will it continue to do so if left started on your drive? Is this good practice? Im on private property in the country with automatic gates so no problem of theft. Or will the cycle cut out if revs arent kept up?

biko

As I understand it the car will stop regenerate the DPF when the car is turned off, the fans stay on to cool engine down.

Whocare

mengele wrote: »

If you can hear your car after starting a regen cycle but you arrive home and are finished with the car, will it continue to do so if left started on your drive? Is this good practice? Im on private property in the country with automatic gates so no problem of theft. Or will the cycle cut out if revs arent kept up?

I have that happened few times to me too Volkswagen .I leave it running heat out exhaust is unreal I put a bit of stick on accelerator pedal to rev it up around 2500rpm probably no need to do it but I see somewhere it good to blow heat out of turbo as if you leave it idling there's a lot of heat soak into the turbo . Only did last week took about 10minutes before I could feel heat out exhaust going back to normal perfect timing after hour of drive to do it very end��

mengele

It would be great if there was a switch where you could tell your car to do it at the beginning of a longish drive.

My question is though will the car continue with its cycle on tick over after it has started the cycle itself or does it need revs.

Audioslaven

mengele wrote: »

It would be great if there was a switch where you could tell your car to do it at the beginning of a longish drive.

My question is though will the car continue with its cycle on tick over after it has started the cycle itself or does it need revs.

Yes it will continue, it does not need to be moving or been revved. Once the regen has started it will not stop unless you turn the engine off.

vectra

Audioslaven wrote: »

Yes it will continue, it does not need to be moving or been revved. Once the regen has started it will not stop unless you turn the engine off.

This ^^

mgbgt1978

biko wrote: »

As I understand it the car will stop regenerate the DPF when the car is turned off, the fans stay on to cool engine down.

Much better to leave it idling if it's in the middle of a regen. It will either finish the regen (if it's nearly complete), or it will stop trying to regen under it's own terms .

CoBo55

My Superb will abandon the regen if you leave the engine idling on the driveway so I just switch it off and bring it for a drive when I can drive continuously for about 15 mins. One of the requirement of the Superb regen is that the car it moving at more than 80 km/h to cool the dpf, I got this info from the Briskoda site.

vectra

CoBo55 wrote: »

My Superb will abandon the regen if you leave the engine idling on the driveway so I just switch it off and bring it for a drive when I can drive continuously for about 15 mins. One of the requirement of the Superb regen is that the car it moving at more than 80 km/h to cool the dpf, I got this info from the Briskoda site.

What age is the superb?
I had 2010 ~ 2012 & a 2013 octy vRS
2015 Passat 2.0
2017 Mondeo 2.0
each and every one of them carried on their regen on tickover.

CoBo55

vectra wrote: »

What age is the superb?
I had 2010 ~ 2012 & a 2013 octy vRS
2015 Passat 2.0
2017 Mondeo 2.0
each and every one of them carried on their regen on tickover.

2019, first of the adblue. 2 litre 150bhp.

vectra

CoBo55 wrote: »

2019, first of the adblue. 2 litre 150bhp.

Possibly the adblue is the cause of that so then as I had no adblue in any of the above.

CoBo55

vectra wrote: »

Possibly the adblue is the cause of that so then as I had no adblue in any of the above.

Maybe so. I was leaving it running on the driveway initially but it never finished. I saw on the briskoda site that the ECU abandoned regen in that situation and it was best to just bring it for steady drive, I don't do any of that revving the guts malarkey,, just obey the gearchanges and it's done in a few minutes.

colm_mcm

I think you can tell by the oil temperature. Mine tends to go to 100 degrees briefly. It'll idle at 1000rpm if it's trying to regen too.
As above, you don't need to do anything special with revs.

mgbgt1978

Seeing as Skoda's have come up on this thread....for anybody with a VAG Diesel, get yourself a Bluetooth OBD adapter (under a fiver on Ebay/ under a tenner from amazon UK if you want it in this decade ) and get the VAG DPF App.

You can watch the Soot level drop as the car regens. In fact, you will see it drop faster if you ease off at any speed above 60km/h.




edit; check that your engine is compatible with the app prior to downloading.

CoBo55

I have an obdeleven will that show soot level?

mgbgt1978

I use vagcom and that shows Ash and Soot levels. OBDeleven is said to do pretty much everything that vagcom does so I'd hope that it has the figures somewhere.

Edit; Google 'OBDeleven soot level' and check out the post from April 2020. Link to a video there which supposedly shows where to find it.

colm_mcm

CoBo55 wrote: »

I have an obdeleven will that show soot level?

Yes you can. It’s usually in the engine live data.

Lewis_Benson

mengele wrote: »

It would be great if there was a switch where you could tell your car to do it at the beginning of a longish drive.

My question is though will the car continue with its cycle on tick over after it has started the cycle itself or does it need revs.

Yes it will complete the cycle while left idling.