DPF burn

[TD5-90]

... Air flow is reduced, fuel injection volume is increased and the injection timing is retarded - all to increase the exhaust gas temperature to around 500 degrees C. That high heat load is probably why we're seeing the cooling fans operating at high speed (and noise!). I had also noticed via the off-road page but never understood why until now, that the engine oil temperature increases about 10 degrees C during a burn. The engine is forced to run hot when a regeneration is occurring and the oil temp rises as a result.

Watched a DPF burn cycle today via OBDlink, saw exhaust gas temps in excess of 670°C.
Apart form egine oil temp going to up to 110°C, also transfer case temp increases substantially. Likely a result of the massive heat flow under the vehicle & radiation from exhaust piping...

 

[Clark Kent]

Watched a DPF burn cycle today via OBDlink, saw exhaust gas temps in excess of 670°C.
Apart form egine oil temp going to up to 110°C, also transfer case temp increases substantially. Likely a result of the massive heat flow under the vehicle & radiation from exhaust piping...

That's hot. The transfer case rise is interesting. Another justification for the cooler perhaps.

 

[matt_grenadier]

My god, i have my grenadier for a week now, and just experienced helicopter mode today on a public parking. Embarassing it kept making this awful noise for 6 min+ when the engine was off.

Imagine going camping, and parking next to someones tent at night and the grenny decides to go in helicopter mode...

Just another inconvinience to add to the list i guess.

 

[Eric]

My god, i have my grenadier for a week now, and just experienced helicopter mode today on a public parking. Embarassing it kept making this awful noise for 6 min+ when the engine was off.

Imagine going camping, and parking next to someones tent at night and the grenny decides to go in helicopter mode...

Just another inconvinience to add to the list i guess.

It gets even more embarrassing if the adjacent car owners move away and call the fire brigade, thinking it is going to self combust

 

[Skydance]

My god, i have my grenadier for a week now, and just experienced helicopter mode today on a public parking. Embarassing it kept making this awful noise for 6 min+ when the engine was off.

Imagine going camping, and parking next to someones tent at night and the grenny decides to go in helicopter mode...

Just another inconvinience to add to the list i guess.

Well at least fingers crossed won’t have any DPF issues in the future as helicopter mode frequently burns off all the crap. Helicopter mode happens more often in traffic and if you keep it below 3000 rpm regularly. Need to give it the beans every so often.

 

[Skydance]

I

It gets even more embarrassing if the adjacent car owners move away and call the fire brigade, thinking it is going to self combust

Imagine taking kids to school prom and this happens.

 

[matt_grenadier]

Well at least fingers crossed won’t have any DPF issues in the future as helicopter mode frequently burns off all the crap. Helicopter mode happens more often in traffic and if you keep it below 3000 rpm regularly. Need to give it the beans every so often.

I drive pretty slow most of the time keeping it between 1200 and 2000 rpm. I find it very soothing cruising at these sweet rpms. Ofcourse sometimes i find it nice to have the power available.

 

[matt_grenadier]

I

Imagine taking kids to school prom and this happens.

Imagine your grenadier is selected to be the wedding vehicle of your best friend. You park the car in front of the church, turn off the car, and the grenny decides to go in helicopter mode.

 

[Cheshire cat]

Mine seems to do it less these days. (2 years / 20,000 miles.)
My daughter was so embarrassed by it, she stopped using it to see her friends.

 

[Eric]

I

Imagine taking kids to school prom and this happens.

That's why Police Scotland don't use them as unmarked police cars for surveillance work.

 

[Baron von Teuchter]

If the burn happens below 60 km/h the car will tell you for sure! It’s a really loud fan noise!

This, 100%. You will definitely know it’s happening!

 

[matt_grenadier]

That's why Police Scotland don't use them as unmarked police cars for surveillance work.

This must be a design flaw

Mine seems to do it less these days. (2 years / 20,000 miles.)
My daughter was so embarrassed by it, she stopped using it to see her friends.

Mine has 26000 km on it so its also not brand new anymore.

 

[Mohs 9]

I wished Ineos had included a manual DPF burn function. Seems the upcoming Ford Ranger Super Duty has it:

View: https://youtu.be/dBbAeDwMgv0?si=In1VkyoCCtgW1Fdf&t=463

(at 7:43)

 

[Baron von Teuchter]

I haven’t watched that so apologies - does that mean you can manually force the vehicle to do a burn? Or delay one? Or even pause/cancel one?

 

[Baron von Teuchter]

Ahhh wait I just watched it. Ok so I’m reading that like you can just tell it to do one. Presumably the car tells you when it thinks one is due?

 

[matt_grenadier]

I haven’t watched that so apologies - does that mean you can manually force the vehicle to do a burn? Or delay one? Or even pause/cancel one?

Yeah. Indeed, just a simple snooze button, like a windows update delay, would avoid all these embarrassing moments in helicopter mode.

 

[Baron von Teuchter]

Yeah. Indeed, just a simple snooze button, like a windows update delay, would avoid all these embarrassing moments in helicopter mode.

Great idea

 

[Cheshire cat]

Is that not where the problem with JLR Ingenium engine arose? The vehicle would automatically start ramping up for a DPF burn. The user might then switch off the engine and the extra fuel would seep down the bores and dilute the oil.
I like the idea of a warning before any form of process begins.

 

[Tazzieman]

Anyone have diesel buyer's regret?

 

[Baron von Teuchter]

Anyone have diesel buyer's regret?

Vaguely, yes.

I didn’t spec mine new, I bought one with 139 miles on the clock and just knew I wanted a trialmaster station wagon with safari windows, tow bar, dog guard, dark glass, steel wheels, cloth heated seats and no carpets. Didn’t mind petrol or diesel. Didn’t even really mind the colour.

In retrospect, I think I’d rather have bought the petrol - I only do 6-7000 miles a year in it so fuel economy isn’t really an issue, I don’t plan selling it so depreciation isn’t an issue and the diesel “stuff” adds complexity and perhaps reliability issues long term.