The American Civil Liberties Union sued Georgia state officials Friday to protest Georgia’s voting system, claiming confusing, outdated equipment is unconstitutional and dilutes the voice of black voters. The lawsuit seeks to throw out the punch card system used in 17 Georgia counties, in which voters use styluses to poke through rectangles of paper, or chads, to select candidates. Filed on behalf of seven black voters, the suit claims Georgia’s election system routinely disenfranchises thousands. Counties that use punch card machines have disproportionately high numbers of black voters. According to the Bush campaign, about 4.4 percent of Georgians either chose not to vote for president, or voted but did not have their votes counted because of error. The national average was 1.9 percent.