
Originally Posted by
merv
The worst car I followed was a Ford diesel. They said the cars are nowhere near as clean as trucks and buses which are big enough to have the gear fitted (whatever it is) to keep the emissions down.
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Someone may already have explained this. If so, tell me and I'll delete this post.
The VW's CAN meet the standards. However, it requires a high rate of exhaust gas recycle to do so and this cuts the power output significantly.
They can't meet the standards AND generate claimed power simultaneously, so the car is set up to use its normal on-board sensors to detect when it's on a rolling road test rig and to turn on the full exhaust gas recycle when this is detected.
I may not be as good as I once was, but I'm as good once as I always was.
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