Gm Global Technolgoy Operations, Inc.

Marc Rambert

Nathaniel E Wilke

Vincent Holtz

Herve Scelers

Morgan Postic

Emmanuel Hoff

Eric Dalais

Maxence De Dreuille

At least a method is provided learning a characteristic filling volume of a hydraulic clutch. The method includes, but is not limited to applying a pressure pulse to the hydraulic clutch when the clutch is in a disengaged state and determining an inflection event at an input or at an output of a torque path in which the hydraulic clutch is situated. A characteristic filling volume of the hydraulic clutch is derived from the determined inflection event. Furthermore, a method is provided for learning a characteristic return spring pressure of the hydraulic clutch, for engaging the hydraulic clutch and corresponding devices for carrying out these methods.

Hydraulic clutch and method for determining an adaptive clutch fill volume of the hydraulic clutch

A method of controlling hydraulic pressure to a torque converter is provided. The method includes: determining a slip error from a target slip value and a measured slip; integrating said slip error; determining a state space feedback control matrix for said measured slip; determining a state space feedback control matrix for said integrated slip error; and controlling pressure based on said state space feedback control matrix for said measured slip and said state space feedback control matrix for said integrated slip error.

Model-based torque converter control

Growing community of inventors

Strasbourg, France

Marc Rambert