Method for synchronizing the layshaft speed in the direct gear

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United States of America Patent

PATENT NO 10640120
APP PUB NO 20180354520A1
SERIAL NO

15773000

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Abstract

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A method of synchronizing the countershaft speed, in the direct gear, for a hybrid application. The transmission (1) comprises a main transmission (HG) comprising two parallel partial transmissions with at least one countershaft (VW), an output shaft (3), and two planetary transmissions (PG1, PG2) each comprising a carrier (ST1, ST2), sun gear (SR1, SR2) and ring gear (HR1, HR2). Each partial transmission has a transmission input shaft (4, 5), with a hollow first input shaft (4) and the solid second input shaft (5). The first planetary transmission (PG1) connects as a range group to the main transmission (HG). The main transmission (HG) comprises first (R1), second (R2), third (R3), fourth (R4) and fifth gear planes (R5) and first (S1), second (S2), third (S3) and fourth shift elements (S4). Synchronization of the countershaft speed to a target speed, in direct gear, is performed via speed control of the electric machine (2).

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Patent Owner(s)

Patent OwnerAddress
ZF FRIEDRICHSHAFEN AG88046 FRIEDRICHSHAFEN

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Gersten, Rayk Friedrichshafen, DE 21 50
Glückler, Johannes Eriskrich, DE 33 80
Kaltenbach, Johannes Friedrichshafen, DE 222 1327
Renner, Stefan Bodman-Ludwigshafen, DE 59 320

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