Patent ID: 8302468

Claim:
An adjustable chassis dynamometer comprising: a fixed roller; an adjustable roller that moves with respect to the fixed roller; at least one sensor that detects a rotational speed of the fixed roller or the adjustable roller; and a belt drive that synchronizes rotation between the adjustable roller and the fixed roller, the belt drive comprising: a fixed pulley associated with the fixed roller; an adjustable pulley associated with the adjustable roller; a tensioner pulley; a belt having an inner surface and an outer surface, and surrounding the fixed pulley, the adjustable pulley, and the tensioner pulley, such that each of the fixed pulley, the adjustable pulley, and the tensioner pulley engaging the inner surface of the belt; and an idler pulley that moves with the adjustable pulley, is located outside of the belt, and engages the outer surface of the belt; and a platform that extends between the fixed roller and the adjustable roller and expands or contracts when the adjustable roller moves with respect to the fixed roller.