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I went back and looked at the article to make sure I am not missing something, and I did pick up a few details. One, it implied that during light throttle cruise there was plenty of exhaust energy for the device, that it was the ideal situation to use the device. That is when you were concerned if it was any use because there was not enough exhaust energy. That is likely why we disagree. Furthermore, it described the TIGERS as using a waste gate to only operate under ideal conditions, primarily because a variable nozzle adds to much to complexity and cost to make it feasible. Your issue with it during less than ideal conditions seems to be valid, as it is bypassed. My gut feeling is that it will work, but bypassing it will take enough away from it that it cannot supply the whole car's electrical needs as implied in the article. The article did suggest that the switched reluctance generator makes it cheap enough that it can be worth it as a supplementary system, either to make smaller alternators viable or to add charge to a hybrid.
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