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1. (WO2018086858) MULTISPEED TRANSMISSION

Pub. No.:    WO/2018/086858    International Application No.:    PCT/EP2017/077061
Publication Date: Fri May 18 01:59:59 CEST 2018 International Filing Date: Wed Oct 25 01:59:59 CEST 2017
IPC: F16H 3/66
B60K 6/48
Applicants: ZF FRIEDRICHSHAFEN AG
Inventors: ZIEMER, Peter
BORNTRÄGER, Kai
MARGRAF, Christoph
BEISSWENGER, Andreas
BROM, Stefan
Title: MULTISPEED TRANSMISSION
Abstract:
Disclosed is a mutispeed transmission comprising an input shaft (1), an output shaft (2), a first front-mounted gear set (VS1), a second front-mounted gear set (VS2), a third front-mounted gear set (VS3), a first rear-mounted gear set (NS1) and a second rear-mounted gear set (NS2), all of which gear sets are in the form of planetary gear sets, further comprising six shifting elements (A, B, C, D, E, F) which, when being selectively shifted, allow an input speed of the input shaft (1) and output speeds generated in the front-mounted gear sets (VS1, VS2, VS3) to be selectively transmitted to the output shaft (2) as an output speed via at least one of the rear-mounted gear sets (NS1, NS2) in order to engage at least 12 forward gears (G1 to G12) and at least one reverse gear (R), four shifting elements (A, B, C, D) being assigned to the front-mounted gear sets (VS1, VS2, VS3), and two shifting elements (E, F) being assigned to the two rear-mounted gear sets (NS1, NS2); at least one of the front-mounted gear sets (VS1, VS2, VS3) is fixedly connected to an element of the rear-mounted gear sets (NS1, NS2) such that six different output speeds of the front-mounted gear sets (VS1, VS2, VS3) can be transmitted to at least one of the rear-mounted gear sets (NS1, NS2); when using the input speed of the input shaft (1) as the standard, one of the output speeds is smaller than 0, three output speeds are between 0 and 1, one output speed equals 1, and one output speed is greater than 1.