Pilot downshifting system and method

摘要

Methods and systems are provided for performing a multiple gear downshift of a transmission gear by transiently operating in an intermediate gear. In response to air mass flow not reaching a threshold for CAC self-cleansing for a set duration, the transmission gear may be downshifted from a higher gear to an intermediate gear, and then to a requested lower gear. Downshifting through an intermediate gear may also be controlled based on the gear shift request and maximum air mass flow levels for engine misfire.

主权项

1. A method for an engine, comprising:
in response to airflow through a charge air cooler and a request to downshift a transmission gear from a higher gear to a lower gear, transiently operating at an intermediate gear before shifting to the lower gear.