Ford, the second-largest US automaker, will announce its first year-on-year sales increase since 2007 later today, thanks to the GovernmentÔÇÖs ÔÇ£cash for clunkersÔÇØ scheme. The federal Car Allowance Rebate System prompted a sudden surge in sales at the end of July for Dearborn, Michigan-based Ford, as customers rushed to trade in older vehicles in return for sums of up to $4,500 if they bought new, fuel-efficient models. Within one week, buyers had almost exhausted the $1 billion of federal funding, which was made available from July 24.