Invention Grant
- Patent Title: Multi-speed planetary transmission
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Application No.: US15477165Application Date: 2017-04-03
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Publication No.: US10253850B2Publication Date: 2019-04-09
- Inventor: Mitchell Irving , Drew A. Crafton
- Applicant: Allison Transmission, Inc.
- Applicant Address: US IN Indianapolis
- Assignee: Allison Transmission, Inc.
- Current Assignee: Allison Transmission, Inc.
- Current Assignee Address: US IN Indianapolis
- Agency: Faegre Baker Daniels LLP
- Main IPC: F16H3/66
- IPC: F16H3/66

Abstract:
A multi-speed transmission including a plurality of planetary gearsets and a plurality of selective couplers to achieve at least nine forward speed ratios is disclosed. The plurality of planetary gearsets may include a first planetary gearset, a second planetary gearset, a third planetary gearset, and a fourth planetary gearset. The plurality of selective couplers may include a number of clutches and a number of brakes. The multi-speed transmission may have four planetary gearsets and six selective couplers. The six selective couplers may include three clutches and three brakes.
Public/Granted literature
- US20180087621A1 MULTI-SPEED PLANETARY TRANSMISSION Public/Granted day:2018-03-29
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