More Stringent Co2 testing in "Real World conditions"

[vrskeith]

https://www.autocar.co.uk/car-news/industry/new-wltp-real-world-emissions-test-adds-15-volkswagen-gtis-official-co2-output

 

[JED]

About time they done this but Joe cant see it strange world. 

[Ryeman]

Will they make the MOT more ‘taxing’, I wonder.

[chimaera]

MOT doesn't check CO2 emissions, just CO and HC for petrol, and smoke only for diesel. Those emissions are telltales for poor engine function, which is liable to cause other harmful emissions to be higher than they should be. Short of fitting a rolling road and testing cars under load, it'd be difficult to meaningfully test for CO2 emissions.

[Ootohere]

The Tests are still not with a vehicle at Max Gross weight, and testing is not at any particular ambient temp.

As to MOT's that comes years after the vehicle takes to the road so hardly relevant.

 

Is that UK first MOT still going to be at 4 years or is that cunning stunt knocked on the head yet?

[Aspman]

Turbo cars seem to be particularly tuned around the emissions testing.

 

I'm sure in the lab as tested they stay off the turbo and in the real world all the drivers start to gun those little gutless lumps and quelle surprise the mpg drops through the floor.

[chimaera]

14 hours ago, AwaoffSki said:

The Tests are still not with a vehicle at Max Gross weight, and testing is not at any particular ambient temp.

As to MOT's that comes years after the vehicle takes to the road so hardly relevant.

Max GVW is a scenario very few owners use frequently. It's not at all representative of the typical use profile.

 

The lab test cycles are intended to represent an average usage scenario, therefore allowing fleet levels to be estimated with some reliability for comparison with air quality measurements. They also serve as a consistent basis upon which consumers can evaluate different cars and make an informed buying choice.

 

20 years ago, NEDC was probably quite a  good representation of driving behaviour across the fleet, but times change, people change, technologies change and it became less useful. Alongside that, manufacturers found and exploited loopholes: it's what every person/company does when faced with a rule. I would be very surprised if we're not here in 20 years time discussing the problems with WLTP  and how manufacturers have exploited its loopholes.

 

MOT is about checking that the vehicle is maintaining its design level performance regarding emissions, using tests that are a useful proxy for engine condition and emissions output, within the limits that a static, no-load test scenario imposes.

[Ootohere]

The Manufacturers do test at Max GVW though which is why there was talk of EU Authorities wanting access to Manufacturers test results.

 

& lots of owners put passengers and luggage in vehicles, fill all the seats and the boot, tow a trailer, so very much a scenario owners do use vehicles, 

even if just on Holidays, and Taxis & Mini Cabs also often put people in the available seats and drive around.

 

As to the MOT safety check, then for 3 years in the UK there is no check, lights badly set right from day one they go on the road in the UK or Ireland.

No requirement to be tested more often then if they are the likes of used as a Taxi.

[chimaera]

1 minute ago, AwaoffSki said:

The Manufacturers do test at Max GVW though which is why there was talk of EU Authorities wanting access to Manufacturers test results.

 

& lots of owners put passengers and luggage in vehicles, fill all the seats and the boot, tow a trailer, so very much a scenario owners do use vehicles, 

even if just on Holidays, and Taxis & Mini Cabs also often put people in the available seats and drive around.

 

As to the MOT safety check, then for 3 years in the UK there is no check, lights badly set right from day one they go on the road in the UK or Ireland.

No requirement to be tested more often then if they are the likes of used as a Taxi.

I wasn't talking about those aspects of the MOT, this thread is specifically about emissions. You're just creating a strawman.

 

Of course manufacturers are going to test at Max GVW, it's part of the design specification, and they need to validate the design in all possible configurations before sale.

 

That doesn't mean it's a significant use case for owners day-to-day. Yes, we will occasionally fill the car with people and luggage, but that's the exception rather than the rule, so to use it for setting emissions targets is not valid. Most people who find themselves frequently loading their car near its limits will take that as a sign to get something bigger/stronger/better suited to their needs.

[Ootohere]

No i asked a that question on the MOT in the post about 4 years still being the in the planning or not.  As an aside.

 

You have been the VW Fan Boy for 18 months or so saying how all was good, trust the lying cheating barstewards, so far as i thought you were a VW Social Media plant.

Now you are asking questions of them an not much comes as a reply, maybe tell them you have been a supporter for so long telling people The Fix is all good, 

Like Dr Pepper asked, What is the worst that can happen?

 

Regardless of many vehicles often being empty, you want to know the Real World with real use, 

not still just an Engineer and test equipment in a properly serviced vehicle at locations and weather conditions of tests when round the world Arctic to Tropics and mile high testing is available, just there is Commercial Confidentiality,  and Cheating Opportunities.

Edited 6 December, 2017 by AwaoffSki

[KenONeill]

Well, for what relevance it has, when I'm following other cars I can often drive off turbo by short-shifting until I get over 40mph.