A work in progress.

[Arragonis]

Careful Euro, PW may be just casing your car for any spare parts - its not that far for him to drive over and pinch a few bits and bobs...

[Piwoslaw]

Originally Posted by Arragonis

Careful Euro, PW may be just casing your car for any spare parts - its not that far for him to drive over and pinch a few bits and bobs...

You just blew my plan, Arra. I was hoping to do the trip on a single tank... (On the way there, anyhow, the return would have too much of a weight penalty, with all my loot.)

[euromodder]

Originally Posted by Coleman

I don't know exactly by how much the dpf improves emissions, especially after 3-8 years of use,

After 4 years, no soot was being detected by the current standard emission test procedure.
That's how much they reduce soot

but I wonder if it is worth the extra fuel burned (not taken into account when calculating fc and emissions)

The fuel used to burn the DPF free goes through the tank, so it's included in my fuel economy.

With the DPF being a restriction in the exhaust path, it's also costing some fuel efficiency.
Then again, current diesels get good FE even despite all that equipment.
My car gets around 40mpg without trying.
But it's rather hard to get it to use a lot less fuel

or the loads of $$$ spent at the service station clearing codes, adding Eloys, or regenerating the filter.

The whole setup & maintenance certainly isn't cheap.

Many Peugeot and Citroen owners have dealt with the problem by removing their FAP and adding a sensor emulator to trick the computer.....

I know, that's an issue.
Many have had problems with them, me included.
It's taken 80.000 km (50000 miles) before the regeneration worked properly.

The newer versions are causing less grief though.
But as the current DPF systems mean no high blends of biodiesel can be used, the future of diesels is getting to look bleak.

[euromodder]

I think I've found the trick to Pulse + Glide (engine on) my Volvo

I had been fooled by reports of careful acceleration at less than double the regular FC for the average speed, but that technique just doesn't seem to work in my car.

Acceleration in my car means the FC shoots up sharply, and doing it gently means the pulse is far longer than the glide while FC is still rather high during the pulse.

So I've resorted to brisk acceleration in a fairly low gear.
Surely it uses a lot of fuel while accelerating, but the pulse is very short compared to the long glide.

With a warm engine, I've seen the average mpg increase while P+Ging through the city.
Before I started using this trick, FE invariably became worse during the city-part of my commute.


At the moment I'm only using this modified P+G technique on selected parts of my commute, but traffic permitting, I plan to start using it on the longer stretches of road as well.

[320touring]

glad you've got p&g working now-i imagine the diseasal needs a lower gear to get the engine into the rev range for max efficiency

[Piwoslaw]

I used to pulse using the 70%-80% rule (gas pedal pressed 70%-80%), but then read about how new turbodiesels' ECU are mapped to be efficient even at 100%, so I just floor it. It also helps to trick other drivers into thinking that I'm not a slow driver, hehe :evilgrin:

Also, when I have to accelerate from a stand-still, I sometimes skip 3rd gear - from 2nd straight to 4th (3rd should start at 40km/h, 4th at 50km/h). This does get the engine above 2000 rpm for a moment, but it also gets me up to speed much faster.

[Arragonis]

How do you find P&G in traffic ?

For a large part of my commute (the badly named Edinburgh Bypass) the traffic is pretty much up my backend or cutting in so I have no space to P&G.

My technique so far is to try and use the elevations to my advantage if I can...

[euromodder]

Originally Posted by Arragonis

How do you find P&G in traffic ?

I haven't really tried it in traffic.
On stretches of road where you'd expect to do a constant speed, I don't P+G when other cars are following.

Most of the time I try to pulse so that I arrive at the right speed at the place where you're expected to slow down anyway.
From the city limit, I can get home in 10 pulses

My technique so far is to try and use the elevations to my advantage if I can...

I'm trying to take advantage of elevations as well.
Pulsing on the downhill to get up the next incline if it's right after the downhill.

[320touring]

Originally Posted by Arragonis

How do you find P&G in traffic ?

For a large part of my commute (the badly named Edinburgh Bypass) the traffic is pretty much up my backend or cutting in so I have no space to P&G.

My technique so far is to try and use the elevations to my advantage if I can...

i find on the m8 that p&g works, even at 15mph.. Infact, the low impact of aero means the glides can be longer. I'm engine on so i have the brakes if req'd

Today i got to 39.1 uk mpg on the on board computer- about 123% of combined for the last 5700 miles, so i think it works

[euromodder]

Well, I tried my modified PP+G-Eon (Power Pulse and Glide with Engine on ... Pigeon ? ) technique a bit more often in traffic, and it doesn't look like other road users are liking it much, nor are they really cooperating.
I either hinder them and then run away from them when they're tailing me.
Or I end up far too close to their rear bumper for comfort when they're ahead of me.

It seems I'll have to polish my technique a bit more to avoid these situations.

But the PP+G-Eon is working rather well

I used to burn more fuel in the city and on the back roads, then get back to a more respectable fuel economy on the motorway.
PP+G-Eon has reversed that situation !
Average fuel consumption is now going down in the city and on the back roads, while constant speed motorway driving is destroying the nice numbers

Friday, when starting with a still lukewarm engine, I was at 3.7L/100km (63.5 mpg) using PP+G-Eon for around 10km.
Then I had to get onto the motorway and ruined it all


Trouble is, the new DPF is acting up again.
It's been burning off the soot 11 times in only 2200 km (1367 miles) !