The Tractor Boys edged past West Bromwich Albion 1-0 on Wednesday night to reach the final four of the competition and although just over 11,000 supporters showed up to Portman Road, Keane said the victory was for the fans who have endured a tough start to the Championship season.
"I am more pleased for other people, it is all about the players and the supporters," Keane said.
"It is not about my feelings because a manager's career will be up or down - we have let the supporters down and (tonight) we have given them something to shout about.
"Let's talk about the 11 or 12,000 that came here. Hopefully a few more will come back for the semi-final.
"Since I have been in the job we have had moments when we have thought we were going to kick on, but we won't until we get some of our players back.
"It was important we put on a performance," he added.
"We know the quality West Brom have got and we wanted to make it a high-tempo game.
"I was pleased with the work-rate, the character and the composure of some of the younger boys.
"To get out of the hole we are in at the moment is about characters, about digging deep and we saw that."