TRANSMISSION CONTROL METHOD AND SYSTEM

摘要

The invention relates to a method and system for controlling a transmission (1 06), particularly a powershift transmission of a machine having many speed and direction changing clutches. The method comprises receiving a shift command (202,252) to cause engagement of a proposed clutch (e.g. associated with a proposed gear ratio), and determining whether the proposed clutch is suitable for engagement (204) based a comparison between an operating condition threshold associated with the proposed clutch and operating conditions which the proposed clutch will be exposed to, if engaged. If the proposed clutch is determined to be unsuitable for engagement (218), the method comprises generating an alternate clutch control signal to cause engagement of at least one suitable alternate clutch. However, if the proposed clutch is determined to be suitable for engagement (220), the method comprises generating a proposed clutch control signal (208) to cause engagement of the proposed clutch.