| 发明名称 | Method of controlling a transmission of a vehicle | ||
| 摘要 | A method of controlling a transmission includes detecting an occurrence of a downshift in the transmission from a first gear ratio to a second gear ratio. A determination is made whether the vehicle is operating within a freeway speed range, and whether an accelerator pedal is depressed at least a minimum percentage of a fully depressed position. When the downshift from the high gear ratio to the low gear ratio is detected, the vehicle is operating within the freeway speed range, and the accelerator pedal is depressed at least the minimum percentage of the fully depressed position, a countdown timer is started to count down from a pre-defined time to zero. An upshift of the transmission from the second gear ratio to the first gear ratio is restricted while the countdown timer defines a time that is greater than zero. | ||
| 申请公布号 | US8972132(B2) | 申请公布日期 | 2015.03.03 |
| 申请号 | US201313901671 | 申请日期 | 2013.05.24 |
| 申请人 | GM Global Technology Operations LLC | 发明人 | Piper Eric;Rustoni Alexander K.;Janczak John;Lado Samantha Victoria |
| 分类号 | G06F7/00;B60W10/11;B60W10/04 | 主分类号 | G06F7/00 |
| 代理机构 | Quinn Law Group, PLLC | 代理人 | Quinn Law Group, PLLC |
| 主权项 | 1. A method of controlling a transmission of a vehicle, the method comprising: providing a transmission control unit to control the operation of the transmission; detecting an occurrence of a downshift in the transmission from a first gear ratio to a second gear ratio, with the transmission control unit, wherein the first gear ratio is a higher gear ratio than the second gear ratio; determining if the vehicle is operating within a freeway speed range or is not operating in the freeway speed range, with the transmission control unit; determining if an accelerator pedal is depressed at least a minimum percentage of a fully depressed position, with the transmission control unit; starting a countdown timer with the transmission control unit to count down from a pre-defined time to zero, when the downshift from the first gear ratio to the second gear ratio is detected, the vehicle is operating within the freeway speed range, and the accelerator pedal is depressed at least the minimum percentage of the fully depressed position; and restricting an upshift of the transmission from the second gear ratio to the first gear ratio, with the transmission control unit, while the countdown timer defines a time that is greater than zero. | ||
| 地址 | Detroit MI US | ||