Euro 6 Questions

[pjay]

Q1 The V5 on my 2020 registered Citroen Relay PVC states that it is Euro6 AO, what does the AO bit mean?

Q2 It is also fitted with the Stop Start option, does this mean it also has a B2B fitted?

Q3 If it has, can it be wired to charge my 230ah Varta Leisure battery on the move

Note, conversion is an East Neuk Campervans Fifer Touring M and has a Sargent E500 PSU and 2 x 100w solars on the roof

TIA

Pete

 

[Lenny HB]

Don't know what Euro 6 AO means not listed anywhere, latest standard is Euro 6d. Euro rating is not normally listed on the V5 best place to check is on your Certificate of Conformity.

Not necessarily a B2B is normally fitted by the converter when a smart alternator is fitted but not always.

If it has a B2B it will charge the leisure battery while driving if it just has a split charge relay with a smart alternator charging while driving won't work very well.

Your converter should be able to confirm what is fitted.

 

[bobandjanie]

It's to do with the EU type approved emission regulations. Bob.

 

[liw1978]

As explained above, plus the 'ISC' relates to 'in-service conformity testing' whereby manufacturers must continue to test random vehicles up to 100,000km to ensure that they continue to comply with emissions parameters.

 

[Guigsy]

My 2020 Ducato's V5 says Euro6B-Y. I think it's actually a slightly older base (it doesn't have adblue). I think it's a plain Euro 6.

I think all the Euro6 diesel engines have the same emissions requirements. But due to dieselgate, the way they were measured to get the certification kept changing. My (probably incorrect) understanding is they were initially all just called Euro6 in 2014, but technically everything was tested to a Euro 6b measurement standard. 6c didn't last long. Euro 6d-temp has been around a while. I think Euro 6d-final is now current?

In terms of clean air zones, it seems likely that they'll all be Euro 6. So it doesn't matter.

The fun begins when the changes to testing standards for the same emissions levels (so it was harder to cheat) meant stop start, smart alternators and adblue were introduced. I think Citroen/Peugeot introduced these earlier in the Euro6 debacle than Fiat?

Before smart alternators came in, the traditional 'on demand' alternators were normally enough to keep both the cab and hab battery charged (although just barely with a larger 3-way fridge). But smart alternators have caused problems for motorhomes that have a leisure battery that needs to be charged and a fridge that's trying to chill. Some manufacturers have put in a B2B which can force a system with a smart alternator to provide enough current for the demand. But it appears that quite a few manufacturers haven't done this.