Patent ID: 8991351
Filing Date: 2015-03-31
Classification: F01L,F16C,Y10T

Abstract:
1. A roller assembly for a diesel engine used in a high mileage vehicle, the roller assembly comprising: a roller having an exterior roller surface and an interior surface that defines a bore extending therethrough; a pin positioned in the bore and defining an exterior pin surface; and a plurality of rolling elements positioned between the exterior pin surface and the interior surface of the roller, each of the plurality of rolling elements rollingly engages the exterior pin surface and the interior surface of the roller; the roller assembly defines a clearance of between 0.01 mm to 0.03 mm between the rolling elements, the exterior pin surface and the interior surface; and the roller assembly is configured to achieve extended life criteria for diesel engines used in the high mileage vehicles, the extended life criteria comprises the clearance not increasing to more than 0.02 mm to 0.06 mm after 500,000 miles of travel of a vehicle powered by a diesel engine having the roller assembly installed therein.