发明名称 |
Method and apparatus for preventing over-shifting on electric vehicles |
摘要 |
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. |
申请公布号 |
US9132825(B2) |
申请公布日期 |
2015.09.15 |
申请号 |
US201414160027 |
申请日期 |
2014.01.21 |
申请人 |
Brammo, Inc. |
发明人 |
Riegels Daniel M. |
分类号 |
B60L9/00;B60W10/08;F16H61/16;B60W10/11;B60W30/188 |
主分类号 |
B60L9/00 |
代理机构 |
Foley Hoag LLP |
代理人 |
Vallabh Rajesh;Foley Hoag LLP |
主权项 |
1. A method of preventing over-shifting in an electric vehicle having a multi-gear transmission and an electric motor operable in a drive mode and a regenerative braking mode, the method comprising the steps of:
(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. |
地址 |
Talent OR US |