Delfouneso is back from a loan spell at Burnley.
He told Villa's website: "It's been a great learning curve. It has given me extra motivation to make my mark in the Premier League. That's where I want to be for my career.
"I am hungry, very hungry, to get myself involved. Hopefully I will be involved before the end of the season.
"I am going to go all out to become a regular in the coming seasons. I am looking to push on and be a success here.
"I want to work hard in training. The last two matches are great games to be involved in and I'd love to be involved in them. I want to finish the season nice and strong."