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WanderingEng · 3360 days ago · link · · parent · post: Volkswagen faces half million recalls, $18b in fines for cheating on diesel emissions tests
A bunch of years ago my brother told me he read something similar about a refrigerator. I've long since forgotten the specifics, but it was something like they tweaked the operation to maximize efficiency for the specific conditions of the Energy Star test, but otherwise the efficiency was terrible. It didn't occur to me until reading this Volkswagen thing that it probably happens all the time. Engineers are good at solving problems. The solution to "pass this test" is different from "meet the conditions of this test under routine operation."Volkswagen basically adhered to the letter of the law in diesel testing, not the spirit.