It was the second time this year that the nation's second-largest auto maker has increased its quarterly dividend. The new dividend rate is 60 cents a share. Ford has 181.4 million shares outstanding. The dividend, payable June 1 to shareholders of record May 1, represents a 10-cents-per-share increase over the first quarter of 1985. Ford said the dividend increase reflects "the company's strong earnings and cash flow." As of March, Ford's U.S. car sales have risen 8.4% over the same period in 1984.