green red orange is the factor it exeeds the limmits benziner= petrol-er engine the ford is not a diesel beating vw and yes petrol also emit high nox as soon as they move to direct injection lean burning nox becomes a problem. petrol particular filters are in the pipeline .
tamarillo,
Nov 27, 4:51pm
Wouldn't the Audi Q3 and the VW golf have exact same engine? In which case is there a difference in how each treat the output? Odd that the VW gets a green!
bwg11,
Nov 27, 5:03pm
Obviously not. The Golf is Euro 6, 110 kW @ 3500, and the Audi is Euro 5, 103 kW @ 4200. Maybe the last 700 rpm pokes out the nasty stuff?
mm12345,
Nov 27, 5:06pm
Fiat Bambina worst of all - LOL. Even in the slow country road test (80km/h max) it's 7.9x the Euro 6 test cycle limit. Anyway, it probably demonstrates that every time someone runs tests slightly differently, they can get wildly different results. That suggests that standard "cycle" tests could be more useful, but look what a debacle that is - even forgetting VW's cynical "cheat". If the authorities think it is a problem (which I'm confident they will with NOx, especially in city environments) then they're going to have a hell of a job "fixing" the problem - unless they ban diesels.
mm12345,
Nov 27, 5:21pm
The "4.8" is 4.8x the Euro 5 limit, if it was measured against the Euro 6 limit, then it's 10.8x the limit, the worst of all cars tested there.
I don't think it's the last 700 rpm or whatever, it's when the car's cruising at a load/throttle setting where the injection mapping switches to a very lean stratified injection setting. Under load/driving hard, then the car will be using more fuel/richer mixture with less NOx produced per litre of fuel, but of course much higher CO2 emission as it's using much more fuel. Those cars (the Audi and VW) have "NOx trap" (speicherkat) catalyst system. This is supposed to absorb NOx, then when the catalyst is full, the ECU is supposed to switch the injection mode to rich/homogenous, then the NOx trapped in the catalyst can be cleared out by chemical reduction which can't happen when the engine is running lean with that system. Supposedly it can with "SCR" - but the cars with SCR (Adblue) don't look so good in that test either. That suggests one way that they could perhaps improve the NOx results is by software update, but fuel use will increase, demand on the primary catalyst might be too high (it might overheat or clog up and die) and the NOx trap catalyst may be so inadequate - originally designed to only pass the now confirmed to be useless Euro 5/6 tests and nothing more - that the only proper fix may be an entirely new and probably large and expensive exhaust system.
gazzat22,
Nov 27, 5:50pm
Just as well we dont have emission testing at WOF/COF testing in NZ unlike other countrys!
aredwood,
Nov 28, 5:47am
If they did there would be even more incentive to keep driving old NZ new cars. No emission controls from the factory.
intrade,
Aug 21, 5:04am
bump! green orange and red is the deviation factor. on immage on post 1 its in german i dont have a english version for you. They all cheat its not possible to meet legislation some greene penpusher moron writes up with stone age techology piston engines. New petrol cars will have exactly the same problem with nox . soon enough your breathing and farting will be taxed as emission just wait for the greenie thugs to dream up a law for that.
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