Patent ID: 6293263
Filing Date: 2001-09-25
Classification: F01N,F02B

Abstract:
A compact supercharger having a volute, a compressor wheel, and a drive portion, the drive portion comprising:a drive gear having an outer circumference and a driven gear having an outer circumference, the drive gear adapted to engage with the driven gear, the driven gear having a driven gear shaft adapted to connect to the compressor wheel, and the drive gear having a drive gear shaft adapted to rotate the drive gear;drive gear bearing races for rotatably supporting the drive gear shaft and drive gear and driven gear bearing races for rotatably supporting the driven gear shaft and driven gear; anda gear case having an inner chamber with a back wall, a front wall, perimeter walls, drive gear bearing mounting recesses to receive the drive gear bearing races, driven gear bearing mounting recesses to receive the driven gear bearing races, at least one oil inlet in the gear case to receive oil, and oil channels in communication with the at least one oil inlet and the driven gear bearing races, and at least one oil outlet on the gear case, wherein the outer circumference of the drive gear located in the gear case is in close proximity to at least portions of the perimeter walls of the inner chamber; and two splitters, each extending from portions of the perimeter side wall, each having a raised face with a lip portion, the raised face and lip being in close proximity with a portion of the outer circumference of the drive gear, each splitter having a channel extending generally below the lip, which channel communicates with one of two oil outlets, wherein the two splitters are spaced apart, wherein during rotation of the drive gear, oil will be expelled against the perimeter wall portion, travel down the perimeter walls and exit through the at least one oil outlet, thereby reducing windage of the oil in the gear case and assisting in power draining of oil from the gear case.