Add: Fuel flow data, Temperature at input of Catalytic converter

[mmi]

Thank you very much for very fascinating app. It provides good and relevant data, has good recording capability thus allowing further analysis and long term tracking. Well, perhaps most importantly - extremely easy to use as it connects easily and quickly.

I'm running VW Transporter equipped with CXEB engine and group 15 works perfectly. I'm confident that also the following engines will work with the app perfectly: CXGA, CXGB, CXHA, CXHB, CXFA as they all belong to same family of Transporter engines.

In scope of DPF monitoring I'd like to propose following changes for this engine group (or perhaps even a dedicated new group not to mess with existing users):

(1) Add parameter "Particle filter: fuel consumption since last regeneration" (IDE01407).

Reasoning: by longer term recording over a few DPF regeneration cycles, the extra dose of fuel used during active regeneration can be extracted from data. This can be done surpriringly reliably by comparing similar journeys without active regeneration with same journeys when regeneration takes place. Demonstrated here https://www.t6forum.com/threads/t6_meas ... ost-318785

(2) Add "Temperature at input of catalytic converter". It can be found e.g. in "IDE04090 - exhaust temperature bank" 1 as second parameter (S2). In same message (S3) is DPF input temperature, and (S4) DPF output temperature. Respectively (S1) is exhaust temperature at turbo input.

Reasoning: by long term monitoring deterioration of the converters capability to raise the exhaust temperature can be detected well beforehand.

(3) To make room for the above could remove "Post injection 2" and "Post injection 3".At current sampling rate it's not possible to render much useful information from these alone.

[mmi]

Well, turned out that the idea of tracking actual fuel consumption by using parameter "Particle filter: fuel consumption since last regeneration" (IDE01407) does not work on all VAG engines. As described in the post above it works very well on the engines mentioned.

However, tried the same method on another engine (Passat 2011, CFFB engine) but unfortunately turned out that the counter IDE01407 on this engine excludes the extra injections (post_injections 1, 2, 3) used during DPF regeneration. Thus renders the idea useless on this engine. Fortunately the amount of fuel consumed can be extracted from the individual injections - the flipside being there are five of them to track full time which requires some serious computing.

Anyways, thanks again for the app - it serves very well the purpose it's designed for!

[admin]

The analysis is very interesting to me. Thanks to share here