Manual Regen

[PDR John]

Originally Posted by Ray,IN

Exhaust valves begin to melt at 1,300°F, and they are made to withstand heat. I suspect something misled you.

Regen happens in the particulate filter right before it exits the vehicle, not in the engine and yes temps out the pipe can hit 1500º F. It pumps in diesel fuel from the tank, ignites it and burns all the soot out of the filter. The soot doesn't begin to burn until 600º C or 1112º F and can go up from there.


There is tons of literature on it.



https://en.wikipedia.org/wiki/Diesel_particulate_filter


https://www.crdperformance.com/dpf-i...-regeneration/

Originally Posted by KenZ71

I've had my 2012 King Aire for 2 years haven't seen any indication of a regen running.

Put about 10,000 miles on the beast. Usually letting the 600 ponies run hard and fast i.e. I'll cruise at 75 or better if the semis are moving in same manner.

It is working as intended, passive regen is happening and has no effect upon the drivability. The way you drive you will most likely never see an issue as you are not loading your exhaust with soot.

[Dieselboy]

I try to avoid idling my coach and I try to run it pretty hard. These motors need to be worked and were designed to be worked.

[bentjm]

Originally Posted by Dieselboy

I try to avoid idling my coach and I try to run it pretty hard. These motors need to be worked and were designed to be worked.

Absolutely.

Letting it sit for 9 months or babying it, is the worst possible situation.

[96 Wideglide]

Originally Posted by KenZ71

I've had my 2012 King Aire for 2 years haven't seen any indication of a regen running.

Put about 10,000 miles on the beast. Usually letting the 600 ponies run hard and fast i.e. I'll cruise at 75 or better if the semis are moving in same manner.

Can you see any 'Hi exhaust temp' symbol in your dash cluster?

Don't know if the addition of DEF changed things, but my year engine, the ECM was programmed to run a regen cycle every 100hrs of engine operation, whether the DPF needed it, or not!

[KenZ71]

Originally Posted by 96 Wideglide

Can you see any 'Hi exhaust temp' symbol in your dash cluster?

Don't know if the addition of DEF changed things, but my year engine, the ECM was programmed to run a regen cycle every 100hrs of engine operation, whether the DPF needed it, or not!

I've got these warning lights but only see them when turning key. Once started they go away. I'll continue on with no worries

[96 Wideglide]

The two symbols next to your left turn arrow are regen / hi-exhaust temp symbols.

In 10,000mi, I'm surprised you haven't seen any illuminated while traveling!

[KenZ71]

Originally Posted by 96 Wideglide

The two symbols next to your left turn arrow are regen / hi-exhaust temp symbols.

In 10,000mi, I'm surprised you haven't seen any illuminated while traveling!

Steering wheel usually blocks the green cruise indicator so I suppose that would mean I missed the regen as well.

In any case it runs like a champ, laughing at hills. So we will let sleeping dogs lie and enjoy the ride

[96 Wideglide]

Originally Posted by KenZ71

Steering wheel usually blocks the green cruise indicator so I suppose that would mean I missed the regen as well.

In any case it runs like a champ, laughing at hills. So we will let sleeping dogs lie and enjoy the ride

Yep, keep on trucking!

[cyqk]

So i have done 3 regens since last winter


All three times after the regen i noticed the turbo having to produce less psi



Not sure how to be scientific about this but in fact the regen seems to work

[MemByTheMile]

Originally Posted by Dieselboy

I try to avoid idling my coach and I try to run it pretty hard. These motors need to be worked and were designed to be worked.

This ^^^^

Extended idling contributes to the DPF needing a region.

In many threads where the topic of idling comes up, it will be mentioned that truckers idle all the time in truck stops and rest areas. Which is true, but those trucks all have manual regen buttons they can use too.

So, if you follow the instructions in your engine manual and avoid idling, except for cool down after highway driving, then the need for regen will be a corner case.

The extreme high heat below the coach during regen, while "camping" with possible combustible materials close by, would be a fire risk. This is why I ASSUME the class A manufacturers do not install regen switches.