Getting into grad school for one field by doing research in another?
Your research in computer science is "somewhat close" to computer engineering. Plus the fact that you've demonstrated your "research" capabilities. That should help your grad school application.

The big question mark would be your abilities in engineering. The way to remove these doubts is to take, and do well in engineering courses.

Getting into a PhD program, while doable, might be a bit of a stretch. It's possible to make a "lateral" transfer into a Master's program, however. That's where you should take engineering courses to prove your abilities in this area.