CONTROL OF TRANSITIONS BETWEEN TRANSMISSION STATES
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United States of America Patent
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Issued Date -
Sep 26, 2024
app pub date -
Mar 21, 2023
filing date -
Mar 21, 2023
priority date (Note) -
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Abstract
A system for controlling a transmission state of a vehicle includes a controller connected to a first drive system and a first transmission including a gear system, a first clutch and a second clutch. The controller is configured to receive a request to change from an initial transmission state to a target transmission state when a propulsion torque is applied to the vehicle. The controller is configured to distribute the propulsion torque such that all of the propulsion torque is applied by a second drive system and the first drive system does not provide any propulsion torque to the vehicle, fully release an off-going clutch from the gear system, control a motor speed based on a rotational speed relation of the target transmission state to reduce a slip speed of the on-going clutch, and fully engage an on-coming clutch to put the first drive system in the target transmission state.
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