When you break a furnace minecraft in the version 1.9 the name of the minecart that dropps is: entity.MinecartFurnace.name (written in cursive letters)
MC-98581
Furnace MInecart
Resolved
Duplicate
0
Noah
(Unassigned)
Unconfirmed
Minecraft 1.9
Retrieved
Thank you for your report.
However, your ticket has been resolved as a duplicate.
This issue has been linked to the original bugreport: MC-95928. You can find or add further information on that report.
If you haven't, please search before reporting any bugs, as it's likely that one exists already.