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Just looked at it briefly, but it seems to be about the European test cycle not covering all driving conditions -- to my knowledge, this is something that has b
by xixi77 11y ago
Just looked at it briefly, but it seems to be about the European test cycle not covering all driving conditions -- to my knowledge, this is something that has been the case for a LONG time, and all manufacturers as well as regulators are well aware of this. Vehicles are designed to conform to the specific standards, and the test procedure is just as much a part of the standard as the actual measurement at the pipe.
US VW scandal is about going way further than just designing the vehicle to satisfy a specific test -- it actively detects that it is being tested and adjusts operation. It's one thing to, say, not try to optimize emissions while towing another vehicle if the standard does not measure emissions during towing, and quite another to cheat on a test that does.
- jacquesm 11y agoThe article specifically addresses the 'test detection' and adjustment feature. See the quoted passage above.
- xixi77 11y agoThat passage just refers to a well-known truck cheating incident (iirc a few US companies were caught doing this at one time too) -- it certainly does not imply that such cheating is an accepted practice at time of writing. It just makes a point that a better-designed test would be trickier to cheat in that way, in addition to being more representative of driving conditions.
- jacquesm 11y agoNo, but it is a published document that likely figures as required reading in the offices of those that are tasked with ensuring that such tricks don't pass out the manufacturing door given the possible penalties. In other words: actively look for defeat devices in software (that's real work but it is doable) and get the engineers involved to state very explicitly that no such devices have been implemented.