Volkswagen chief executive Martin Winterkorn resigned Wednesday as a growing scandal over falsified emissions tests rocked the world's biggest carmaker. "I am doing this in the interests of the company even though I am not aware of any wrongdoing on my part," Winterkorn said after an emergency meeting with Volkswagen directors. Winterkorn, 68, was Volkswagen (VLKAY) CEO for eight years. The German company, which also owns the Audi and Porsche brands, had just achieved his long-standing goal of overtaking Toyota (TM) to become the biggest automaker three years ahead of target. CNNMoney