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Just testing and sharing observation, no conclusion whatsoever.
So pls don't take this as final, just playing around with numbers and making observations.
Made some adjustments:
This time I omitted Forced Regen. Drove all the way down to 8% DPF, Temp was around 650C
Name: A (Regen / 5th injector ??)
PID: 017a
Min: 0, Max: 1
Fn: {B:0}
Result: 0=ON, 1=OFF
Name: B (Regen Mode)
PID: 017a
Min: 0, Max: 1
Fn: {B:1}
Result: 0=ON, 1=OFF
Previous observations below:
Cold engine or OFF, A = 1, B = 1
Engine starts, begins to warm up, and then 50 mins of mixed driving, mixed terrain…
town > highway > town
During initial warm up, nothing happens (A = 1, B = 1)
Soot accumulates from 98% up to 100% while driving.
But about 10mins later of driving, engine warms up, Passive regen in place
B = 0, A = 0 and 1 intermittently.
When value A is 0, a few seconds later, I could see soot accumulation % drops.
Tested engine rev & speed has no impact to when A is 0 or 1.
I was driving 70-95km/h with a mixture of high & low revs and no direct correlation at all.
In fact I’m even seeing soot % drop when doing downhill with throttle released completely.
But in most situations, soot % drops when A =0 ….or the % dropped a few seconds later (by that time A could be = 1) until a few seconds later A is back at 0. And the passive regen cycle continues.
This went on until I’ve reached destination. Car was parked & stationary. Engine STILL ON, no throttle applied, transmission in Parked position.
A=0, B=0 constantly
A never went to 1 (well.. it did for a millisecond or so, and then 0 all the way)
(Passive regen still in place)
Soot dropped to 40%
Man I was craving for coffee.
Waited for about 3-5 mins later, engine sound suddenly settles down (rev’s down)
A=1, B=1 instantly
(Passive regen stops)
Soot accumulation = 40%
Waited for another 5 mins… A=1, B=1
Nothing happens
Soot accumulation maintained at 40%
So I did the naughty thing to start Manual Regen….. (from 40% soot)
A=0, B=0
Soot % did NOT fire up to 100% this time (passive regen completed)
After a while (30sec later), engine sound settles down a little (but still higher than usual).
DPF soot accumulation decrements 2% at a time gradually from 40%
At 6%, manual regen stops.
Engine sound settles down to usual.
A=1, B=1
1-min later soot % drops to 4% and then settles at 2%
Still a little bit of passive regen there, or I could be dreaming, so I went for my coffee.
So maybe we can use this to tell when a regen mode is active (B), and when DPF burn (A) is in place.
But if you find the 1/0 confusing, you can use the ON/OFF display interface for dashboard.
Enjoy your weekend guys. It’s been a great forum.
So pls don't take this as final, just playing around with numbers and making observations.
Made some adjustments:
This time I omitted Forced Regen. Drove all the way down to 8% DPF, Temp was around 650C
Name: A (Regen / 5th injector ??)
PID: 017a
Min: 0, Max: 1
Fn: {B:0}
Result: 0=ON, 1=OFF
I discovered there is a DELAYED A=1 response aprox. 2-3sec after applying throttle/revving (could be OBD adaptor being slow reading).
However response does not follow through continuous revs, just stops A=0, 1 sec. later.
(maybe I did not notice this earlier, it's difficult to monitor and drive at the same time)However response does not follow through continuous revs, just stops A=0, 1 sec. later.
Name: B (Regen Mode)
PID: 017a
Min: 0, Max: 1
Fn: {B:1}
Result: 0=ON, 1=OFF
Previous observations below:
Cold engine or OFF, A = 1, B = 1
Engine starts, begins to warm up, and then 50 mins of mixed driving, mixed terrain…
town > highway > town
During initial warm up, nothing happens (A = 1, B = 1)
Soot accumulates from 98% up to 100% while driving.
But about 10mins later of driving, engine warms up, Passive regen in place
B = 0, A = 0 and 1 intermittently.
When value A is 0, a few seconds later, I could see soot accumulation % drops.
Tested engine rev & speed has no impact to when A is 0 or 1.
I was driving 70-95km/h with a mixture of high & low revs and no direct correlation at all.
In fact I’m even seeing soot % drop when doing downhill with throttle released completely.
But in most situations, soot % drops when A =0 ….or the % dropped a few seconds later (by that time A could be = 1) until a few seconds later A is back at 0. And the passive regen cycle continues.
This went on until I’ve reached destination. Car was parked & stationary. Engine STILL ON, no throttle applied, transmission in Parked position.
EGTB1S2 fluctuating range 460-490C
Soot was at 46% and still dropping (passive regen still in place)A=0, B=0 constantly
A never went to 1 (well.. it did for a millisecond or so, and then 0 all the way)
(Passive regen still in place)
Soot dropped to 40%
Man I was craving for coffee.
Waited for about 3-5 mins later, engine sound suddenly settles down (rev’s down)
A=1, B=1 instantly
(Passive regen stops)
Soot accumulation = 40%
Waited for another 5 mins… A=1, B=1
Nothing happens
Soot accumulation maintained at 40%
So I did the naughty thing to start Manual Regen….. (from 40% soot)
A=0, B=0
Soot % did NOT fire up to 100% this time (passive regen completed)
After a while (30sec later), engine sound settles down a little (but still higher than usual).
DPF soot accumulation decrements 2% at a time gradually from 40%
At 6%, manual regen stops.
Engine sound settles down to usual.
A=1, B=1
1-min later soot % drops to 4% and then settles at 2%
Still a little bit of passive regen there, or I could be dreaming, so I went for my coffee.
So maybe we can use this to tell when a regen mode is active (B), and when DPF burn (A) is in place.
But if you find the 1/0 confusing, you can use the ON/OFF display interface for dashboard.
Enjoy your weekend guys. It’s been a great forum.
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