Invention Grant
- Patent Title: Method and apparatus for preventing over-shifting on electric vehicles
- Patent Title (中): 防止电动车辆过度转换的方法和装置
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Application No.: US14160027Application Date: 2014-01-21
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Publication No.: US09132825B2Publication Date: 2015-09-15
- Inventor: Daniel M. Riegels
- Applicant: Brammo, Inc.
- Applicant Address: US OR Talent
- Assignee: Brammo, Inc.
- Current Assignee: Brammo, Inc.
- Current Assignee Address: US OR Talent
- Agency: Foley Hoag LLP
- Agent Rajesh Vallabh
- Main IPC: B60L9/00
- IPC: B60L9/00 ; B60W10/08 ; F16H61/16 ; B60W10/11 ; B60W30/188

Abstract:
Methods and apparatus are provided for preventing over-shifting in electric vehicles having a multi-gear transmission and an electric motor operable in a drive mode and a regenerative braking mode. The method includes: (a) predicting the speed of the electric motor resulting from downshifting from a current gear being used to a next lower gear based on a current speed of the electric vehicle, a current speed of the electric motor, and a gear ratio of the next lower gear; (b) determining if the speed of the electric motor predicted in (a) will cause an overvoltage condition from regenerative braking or an overspin condition in the electric motor; (c) preventing downshifting to the next lower gear when it is determined that the downshifting will cause an overvoltage condition or an overspin condition in the electric motor; and (d) repeating steps (a), (b), and (c) a plurality of times.
Public/Granted literature
- US20140249707A1 METHOD AND APPARATUS FOR PREVENTING OVER-SHIFTING ON ELECTRIC VEHICLES Public/Granted day:2014-09-04
Information query
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