The patents (8,069,839, 9,255,519, 9,810,166, and 10,138,826) are strange. Each describes a system where both gasoline and ethanol are available in separate tanks and the mixing is controlled to minimize knock. That's a dead end as a commercial product. The claims, though, were drafted to cover a system where the fuel enters the cylinder through both a port and direct injection, allowing some tweaking. It's a stretch to claim these patents cover a single-fuel engine.

Ford can probably argue that the claims are not supported by the specification.