System for selecting a transmission economy-based shift schedule

摘要

The present invention provides a method of selecting an economy mode shift schedule for a transmission coupled to a motor vehicle. The method includes calculating vehicle acceleration and determining a change in accelerator pedal position. Also, a net tractive effort force of the vehicle is determined for a current gear range of the transmission. Also, the method includes comparing the net tractive effort force for the current gear range to a maximum tractive effort force for a desired gear range and selecting the economy mode shift schedule for the transmission based on the comparison. The method further includes controlling shifting between one or more gear ranges of the transmission according to the economy mode shift schedule.

主权项

1. A system for selecting an economy mode shift schedule for a motor vehicle, comprising:
a transmission having a torque converter and a plurality of selectable gear ranges; a transmission control circuit including a control module having the economy mode shift schedule stored therein, the transmission control circuit configured to operably control the transmission; an engine control circuit configured to control operation of an engine, the engine being operably coupled to the transmission; a communication link configured to transfer information between the transmission control circuit and the engine control circuit; wherein, the control module further includes instructions stored therein for executably controlling the transmission control circuit to
calculate vehicle acceleration,determine a change in accelerator pedal position,compute a net tractive effort force of the vehicle for a current gear range of the transmission,compare the net tractive effort force to a maximum tractive effort for a desired gear range,select the economy mode shift schedule for the transmission based on the comparison; andcontrol shifting between gear ranges of the transmission according to the economy mode shift schedule.