METHOD FOR INTELLIGENT QUICK BED-IN OF AN AUTOMATIC TRANSMISSION

摘要

The present disclosure provides a method for an intelligent quick bed-in of an automatic transmission comprising the steps of operating the vehicle according to a predetermined protocol so that the powertrain controller can learn about powertrain variations and adapt operation of the transmission; obtaining feedback information regarding operator performance of the method and vehicle performance during the method; determining whether the bed-in method was successful by the level of run-up or tie-up, by whether the powertrain controller was allowed to adapt, or by the level of powertrain controller adaptation; and completing the bedding-in process. The method being capable of reducing the time required for a bedding-in process, while improving the reliability of the bedding-in process.

主权项

1. A method for bedding-in an automatic transmission of a vehicle having an engine and a powertrain controller, the powertrain controller configured to measure and learn about a transmission variation and adapt one or more operational parameters associated with shifting of the automatic transmission responsive to the transmission variation, the transmission having an input shaft receiving torque from the engine, the method comprising the steps of:
operating the vehicle according to a predetermined protocol so that the powertrain controller can learn about powertrain variations and adapt operation of the transmission; obtaining feedback information from the powertrain controller, the feedback information including accelerator pedal position information and transmission [torque converter] speed information; determining whether a position of an accelerator pedal during the step of operating the vehicle according to the predetermined protocol was within an acceptable position range based on the accelerator pedal position information; determining whether a level of at least one of run-up and tie-up remained below a corresponding run-up and tie-up threshold during operation of the predetermined protocol based on transmission operation information obtained from the powertrain controller; and completing the bedding-in process if the position of the accelerator pedal was within the acceptable position range during operation of the predetermined protocol and the level of at least one of run-up and tie-up did not exceed the corresponding run-up and tie-up threshold during operation of the predetermined protocol.