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Method for reducing driveline disturbances by controlling torque converter clutch application

  • US 5,484,353 A
  • Filed: 02/14/1994
  • Issued: 01/16/1996
  • Est. Priority Date: 02/14/1994
  • Status: Expired due to Term
First Claim
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1. In a vehicle having a torque converter coupling the output of an internal combustion engine to the input of a transmission gearset, the torque converter having a selectively engageable torque converter clutch operable in a release mode and apply mode for effectuating hydrodynamic and mechanical coupling, respectively, between the internal combustion engine output and transmission gearset input, a method tier reducing torque induced driveline disturbances by controlling the mode of the torque converter clutch operation comprising the steps:

  • establishing the torque converter clutch mode in accordance with a base apply/release pattern;

    determining engine speed;

    determining manifold absolute pressure;

    comparing manifold absolute pressure to a predetermined driveline disturbance threshold, said threshold being a function of said engine speed; and

    when manifold absolute pressure exceeds said threshold for a first predetermined interval, overriding the base apply/release pattern to command the operation of said torque converter clutch in the release mode for a second predetermined interval.

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