Quote:
Originally Posted by wwest
According to the US patent granted to Ford the FEH/MMH regenerative braking is disabled (assuming actual patent application) if the OAT hovers around freezing or below. Too much danger of encountering slippery roadbed conditions wherein engine compression braking or regenerative braking on FWD or front torque biased AWD vehicles is potentially unsafe.
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I drive in "L" quite a bit and I can also say that at 20F or so the regen is still active and it feels fine. They may have a patent and have decided it wasn't useful and not included the work on the FEH.