Model year 2019 production to start from week 31 2018

[ar899]

At least I would actually be able to order a GTD (as opposed to a GTI).

[fredgroves]

I do high mileage but want to go petrol to avoid things like DPF........might as well go diesel then

If you are doing high mileage you don't have to worry about a DPF at all.

I'm a mile muncher and absolutely don't have any worries about DPF.

[ar899]

The problem is the type of mileage I do. Week to week it is short trips around town - not good for diesel.

These are complemented by regular 600 mile round trips - good for diesel.

Overall, I do about 17K/year which is (or maybe was) diesel mileage.

[fredgroves]

What do taxi drivers do?

[mcmaddy]

The problem is the type of mileage I do. Week to week it is short trips around town - not good for diesel.

These are complemented by regular 600 mile round trips - good for diesel.

Overall, I do about 17K/year which is (or maybe was) diesel mileage.

Your regular 600 mile trip will negate any issue with the shorter journeys you do.

[ar899]

I'm not sure about that. I had a diesel hire car for a couple of weeks. After nearly every short trip, the fan had kicked in - I'm not technical enough to know what that is a sign off, but it didn't sound happy......

[fredgroves]

The fan runs after a DPF regen is completed to cool it down so as to not set fire to stuff under the car....

[rjwojcik]

actually since posting above I've been reading up on Gasoline particulate filters (GPF). It seems they will differ considerably from the ones fitted to diesel engines. As petrol engine exhaust temperatures are much higher than diesel, apparently the cars will not need to do active regens as it will regen on the fly as soon as the car is up to temperature, (which is very quickly), and apparently the regens will finish much quicker than on diesel engines. They have basically said it will be pretty transparent to the average driver, and won't actually affect the use and mileage of the car at all.


About the only downside is the extra tech on board (which is something else to go wrong), and I guess there will have to be another price increase to cover the expense of the tech ?

Do GPFs affect the power output?

[BobbyT]

I would think they would a little. It's another restriction in the exhaust, they may have to tweak the map to get the power up a little.

[fredgroves]

actually since posting above I've been reading up on Gasoline particulate filters (GPF)... apparently the cars will not need to do active regens

A quite up to date article:

https://www.dieselnet.com/tech/gasoline_particulate_filters.php

The GPF regenerates passively, but an active regeneration assist is needed to prevent filter plugging during low temperature duty cycles. Ash has an impact on GPF performance and—if the GPF is coated with a three-way catalyst—can be a source of catalyst poisoning.

Sounds to me like GPF Mk1 will be the same abortion as the earlier DPF's...

And of course...

One of the early applications of a coated GPF was the 1.0 TSI engine used in the 2018 VW up! GTI city car.