Method of rebuilding solenoids for automatic transmissions
AssigneeAdvanced Powertrain Engineering, LLC
InventorPaul Fathauer
Life of this patent
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Abstract
A method of rebuilding a solenoid for use in automatic transmissions is disclosed. In one embodiment, an improvement over the original equipment design allows for increased durability of the solenoid. In another embodiment, a lower cost method is disclosed for reusing an expensive component. In either case, various components within the solenoid are reused, reconditioned or replaced. A preferred process for disassembling the solenoid is also disclosed.
Claims10
1-19. (canceled)
A method for restoring a used solenoid and valve assembly from an automatic transmission, comprising:
- providing a new bushing, and a used solenoid assembly including a solenoid housing connected to a valve housing, the solenoid housing holding within it an electromagnetic actuator supported by a used bushing, the valve housing holding within it a spool valve movable by the actuator along an axis;
- testing the hydraulic characteristics of the used solenoid assembly by applying a range of electrical currents to the solenoid to move the spool valve within a range of positions;
- comparing the tested hydraulic characteristics to OEM hydraulic characteristics;
- removing the used bushing;
- installing a new bushing after said removing;
- and
- retesting the hydraulic characteristics of the used solenoid assembly with the new bushing by applying the range of electrical currents to the solenoid to move the spool valve within a range of positions.
A method for restoring a used solenoid and valve assembly from an automatic transmission, comprising:
- providing a new bushing, and a used solenoid assembly including a solenoid housing connected to a valve housing, the solenoid housing holding within it an electromagnetic actuator supported by a used bushing and biased along a direction by the axial position of a set screw that supports the used bushing, the valve housing holding within it a spool valve movable by the actuator along the axis;
- removing the used bushing from the set screw;
- installing a new bushing in the set screw after said removing;
- testing the hydraulic characteristics of the used solenoid assembly with the new bushing;
- and
- biasing the actuator along the direction by turning the set screw.
Dependencies are inferred from the claim text.