×

Method for determining the fill time of a transmission clutch

  • US 5,580,332 A
  • Filed: 04/13/1995
  • Issued: 12/03/1996
  • Est. Priority Date: 04/13/1995
  • Status: Expired due to Term
First Claim
Patent Images

1. A method for determining when a clutch substantially fills with fluid, the clutch being one of a plurality of speed and direction clutches associated with an automatic transmission, the transmission being adapted to receive torque from an engine through a torque convertor, the transmission producing a shift from a first transmission ratio to a second transmission ratio through disengagement of an off-going clutch associated with the first transmission ratio and engagement of an on-coming clutch associated the second transmission ratio, the method comprising the steps of:

  • monitoring an output speed of the transmission;

    monitoring an intermediate speed of the transmission;

    determining when an off-going clutch substantially releases based on the transmission intermediate and output speeds; and

    determining when an on-coming clutch substantially fills based on when the off-going clutch substantially releases.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×