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US 7,195,578 B2Granted
Automatic transmission and gear train
AssigneeAxiom Automotive Technologies, Inc.
InventorsScott R. Dalenberg, Theodore V. Kachel, John W. Creighton
Life of this patent
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Abstract
The present invention relates to automatic transmissions. In particular, the instant invention relates to an automatic transmission with improved resistance to deterioration with an increased effective life. The transmission of the instant invention comprises eight pinion gears assembled into one carrier utilizing a forward and a rear sun gear, a ring gear, a band drum and a one way roller clutch.
Claims7
A method of modifying an automatic transmission having a conventional planetary gear system comprising:
- (a) increasing a number of pinion gears between sun and ring gears of the planetary gear system in order to delay beginning of gear spalling;
- (b) inserting a metal sleeve in a housing of a transmission pump in an area of an outer gear;
- (c) altering a geometry of an inner pump crescent to create a 0.060″ inner clearance between an inner gear and a leading edge of the inner pump crescent;
- and
- (d) modifying an oil lubrication circuit to allow a constant flow of oil from a pressure port to a lubrication port.
2 more elements
Dependencies are inferred from the claim text.