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US 2013/0075221 A1Published application
Apparatus and method for automated transmission clutch fill during engine start-stop operation
AssigneeChrysler Group LLC
InventorThomas D. Nogle
Life of this patent
Estimating the term…
Abstract
An apparatus and a method for engaging a friction element, e.g., a clutch, in an automatic transmission. The apparatus includes a piston contained within a housing that is used to apply pressure to and operate the friction element. The piston divides the housing into first and second chambers that are supplied with fluid by various valves. The pressure of the fluid in the chambers controls the position of the piston.
Claims20
An apparatus for engaging a friction element in a transmission of a vehicle, the apparatus comprising:
- a housing;
- a piston at least partially contained within the housing and dividing the housing into first and second chambers, the piston for engaging the friction element;
- and
- a fluid supply apparatus for supplying fluid to the first and second chambers, wherein a position of the piston is determined by a pressure of the fluid in the first chamber and a pressure of the fluid in the second chamber.
1 more element
A method of engaging a friction element in an automatic transmission of a vehicle, said method comprising:
- providing a piston for engaging the friction element, the piston being at least partially contained within a housing and dividing the housing into first and second chambers;
- supplying fluid to the first chamber;
- and
- supplying fluid to the second chamber, wherein a position of the piston is determined by a pressure of the fluid in the first chamber and a pressure of the fluid in the second chamber.
1 more element
Dependencies are inferred from the claim text.