Shift control systems and methods for an automatic transmission

Abstract

A transmission shift control system includes a transmission shift control module that executes an upshift or a closed-throttle downshift, a shift stage determination module, and a clutch control module. The stage determination module determines a stage of the upshift or the closed throttle downshift when a downshift is requested. The clutch control module determines a downshift type based on the stage of the upshift or the closed throttle downshift and selectively executes a downshift before the upshift or the closed throttle downshift is completed.

Description

technical field [0001] The present disclosure relates to automatic transmissions, and more particularly to shift control systems and methods with improved shift response times. Background technique [0002] The background description provided herein is for the purpose of generally presenting the context of the disclosure. The work of the presently named inventors, to the extent described in this Background section and to those described aspects which may not be prior art at the filing date, is neither expressly nor impliedly admitted to be relative to the present disclosure. language prior art. [0003] Automatic transmissions for motor vehicles typically include a plurality of gear elements and torque building devices such as clutches and brakes. Clutches and brakes are selectively engageable to activate certain gear elements to establish a desired speed ratio between the transmission input shaft and the transmission output shaft. [0004] The transmission input shaft is...

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