Method for controlling a hybrid driveline in order to achieve gear change without interruption of torque
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United States of America Patent
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Apr 17, 2018
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N/A
app pub date -
Mar 17, 2015
filing date -
Mar 20, 2014
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Abstract
A method is provided to control a hybrid powertrain to achieve gear shifts without torque interruption, comprising a gearbox with input shaft and output shafts; a first planetary gear connected to the input shaft and a first main shaft; a second planetary gear connected to the first planetary gear and a second main shaft; first and second electrical machines respectively connected to the first and second planetary gears; a first gear pair and a third gear pair between the first main shaft and a countershaft; and a second gear pair between the second main shaft and the countershaft, which is connected with the output shaft via a fifth gear pair. The method comprises disconnecting the first gear pair; connecting the first planetary gear with the output shaft via a coupling mechanism connecting the first main shaft and output shaft; disconnecting the fifth gear pair; transferring torque generated from the combustion engine from the second planetary gear to the countershaft via the second gear pair; and transferring a torque from the countershaft to the output shaft via the third gear pair.
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