| 发明名称 | Device for controlling automatic transmission | ||
| 摘要 | A device for controlling an automatic transmission including a first frictional engagement element that is engaged at a first gear shift stage and is released at a second gear shift stage, the device including a piston stroke return determination means for determining a released state of a piston that is actuated to press friction discs of the first frictional engagement element, and a gear shift start determination means for restricting execution of a gear shift from the second gear shift stage to the first gear shift stage until it is determined that the piston is in a predetermined released state after a gear shift from the first gear shift stage to the second gear shift stage is finished. | ||
| 申请公布号 | US9347551(B2) | 申请公布日期 | 2016.05.24 |
| 申请号 | US201214358622 | 申请日期 | 2012.11.05 |
| 申请人 | JATCO LTD;NISSAN MOTOR CO., LTD. | 发明人 | Endo Go |
| 分类号 | F16H61/02;F16H61/08;B60K20/02;F16H61/68;F16H61/06;F16H61/686;F16H59/68 | 主分类号 | F16H61/02 |
| 代理机构 | Foley & Lardner LLP | 代理人 | Foley & Lardner LLP |
| 主权项 | 1. A device for controlling an automatic transmission, the automatic transmission comprising a first frictional engagement element that is engaged at a first gear shift stage and is released at a second gear shift stage, the device for controlling an automatic transmission comprising: a piston stroke return determination means for detecting a released state of a piston that is actuated to press friction discs of the first frictional engagement element; and a gear shift start determination means for restricting execution of a gear shift from the second gear shift stage to the first gear shift stage until it is determined that after a gear shift from the first gear shift stage to the second gear shift stage is finished, a stroke of the piston is returned from a completely engaged state and the piston is in a predetermined released state. | ||
| 地址 | Fuji-Shi JP | ||