"To work with me, you have to be committed, you have to have the will to win," he told reporters after being presented by the club with which he started and ended his playing career
"I never left Inter, I was always here as a fan. Inter opened their doors to me when I was 14 years old and now I'm ready to pay them back."
Dunga's four years with Brazil between 2006 and 2010 are his only previous experience as a senior coach. He succeeded Carlos Alberto Parreira after the 2006 World Cup and won the Copa America one year later, followed by the Confederations Cup in 2009.
"Inter have a strong tradition," he said. "Inter fans will accept everything, except when players don't give everything for 90 minutes.
"The worst defeat of all is when you get home and think you could have done better. Everybody has to be committed."
His club career took him to Corinthians, Vasco da Gama and Santos in his homeland, Pisa, Fiorentina and Pescara in Italy, VfB Stuttgart in Germany and Japan's Jubilo Iwata.
They finished 10th in this year's Brazilian championship. Dunga replaced Fernandao, a player in the 2006 team who was fired as coach in November.
