Cummins Inc.
Two plane accessory mounting with sliding pilot interface

Abstract:

System and methods mount an accessory to an engine block having a pilot bore aligned with a first plane and sealing surfaces aligned to a second plane different than the first plane. The accessory includes a sliding pilot for interfacing with the pilot bore that is capable of sliding in an "x" direction yet fixed in a "y" direction with respect to the accessory housing. Interfacing the sliding pilot in a mounting position with the pilot bore along a "z" direction locates the accessory with respect to the engine block in the "y" and "z" directions. Fastening the accessory to the sealing surfaces of the engine block locates the accessory in the "x" direction with sufficient precision to mitigate gear backlashing and providing one or more fluid seals between the accessory and the engine block.