Vehicle transmission operation

Abstract

The invention provides vehicle transmission operation. A system includes a computer including a processor and a memory, the memory storing instructions executable by the processor to plan a pluralityof vehicle speeds for an upcoming road segment, adjust one or more of the planned speeds based on a predicted torque loss including a penalty based on a predicted torque impeller speed, and actuate apropulsion according to the planned speeds to lock a torque converter clutch.

Description

technical field [0001] Aspects of the disclosure relate generally to vehicle transmissions. Background technique [0002] A torque converter in a vehicle allows the transfer of rotational output from a propulsion device (eg, an internal combustion engine and / or an electric motor) to a transmission. The torque converter transfers the propulsion plant output to the transmission input, thereby increasing or maintaining the speed of the transmission to the speed of the propulsion plant. However, some propulsion output may be lost as torque losses in the torque converter. To reduce torque loss, a torque converter clutch may lock the torque converter to the propulsion, transferring rotation directly from the propulsion to the transmission. However, identifying when the torque converter clutch may be operated to reduce torque loss and adjusting the operation of the vehicle to lock the torque converter clutch to reduce torque loss is problematic. Contents of the invention [00...

AI Technical Summary

Problems solved by technology

However, identifying when the torque converter clutch can be operated to reduce torque loss and adjusting the operation of the vehicle to lock the torque converter clutch to reduce torque loss is problematic

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