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Originally Posted by Jason
I don't understand why everyone is so perplexed by the EV mode producing no emissions. This is exactly what happens in real life! Unless the test is so short that the engine is never used at all or the battery is not at the same level at the end as the beginning, this should not make hybrid results less accurate.
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That's exactly what the problem is, however. The test is started with a fully charged battery pack and there is no requirement that it be at the same level at the end of the test. From what I've read elsewhere, the pack is about half depleated by the end of the test, thus you don't see the effects of lost assist and forced charging, both of which would have pulled down the scores a bit. The only way to "fix" that would be to run the test for a very long period or to tell the manufacturer it must maintain a certain battery level at the start and end of the test.