Invention Grant
- Patent Title: Transmission for a motor vehicle
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Application No.: US14646621Application Date: 2013-10-24
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Publication No.: US09599196B2Publication Date: 2017-03-21
- Inventor: Stefan Beck , Christian Sibla , Wolfgang Rieger
- Applicant: ZF Friedrichshafen AG
- Applicant Address: DE Friedrichshafen
- Assignee: ZF Friedrichshafen AG
- Current Assignee: ZF Friedrichshafen AG
- Current Assignee Address: DE Friedrichshafen
- Agency: Dority & Manning, P.A.
- Priority: DE102012221234 20121121
- International Application: PCT/EP2013/072228 WO 20131024
- International Announcement: WO2014/079644 WO 20140530
- Main IPC: F16H3/44
- IPC: F16H3/44 ; F16H3/62 ; F16H3/66

Abstract:
A transmission includes a drive shaft (1), an output shaft (2), a housing (G), a first planetary gear set (PR1), a second planetary gear set (PR2) and a third planetary gear set (PR3), and six shift elements, including a first brake (B1), a second brake (B2) along with a first clutch (K1), a second clutch (K2), a third clutch (K3, K3′, K3″, K3′″) and a fourth clutch (K4, K4′). The shift elements are selectively actuated, by which nine forward gears and one reverse gear can be realized through different transmission ratios between the drive shaft (1) and the output shaft (2). Each planetary gear set (PR1, PR2, PR3) has a sun gear (S1, S2, S3), one planetary gear, one planetary carrier (PT1, PT2, PT3) and one ring gear (H1, H2, H3). The drive shaft (1) and the output shaft (2) are arranged in a manner axially offset to each other, and the drive shaft is (1), through the second clutch (K2), connectable to the ring gear (H2) of the second planetary gear set (PR2) and the sun gear (S3) of the third planetary gear set (PR3). The drive shaft (1) is, through the first clutch (K1), connectable to the second brake (B2) and the sun gear (S2) of the second planetary gear set (PR2). The sun gear (S2) of the second planetary gear set (PR2) and the second brake (B2) are also connected to each other.
Public/Granted literature
- US20150285342A1 9-Speed Planetary Gearbox Public/Granted day:2015-10-08
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