发明申请
- 专利标题: Front Wheel Drive Automatic Transmission with a Selectable One-Way Clutch
- 专利标题(中): 前轮驱动自动变速箱与可选单向离合器
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申请号: US12177454申请日: 2008-07-22
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公开(公告)号: US20100022342A1公开(公告)日: 2010-01-28
- 发明人: Farzad Samie , Andrew L. Bartos , Chunhao J. Lee
- 申请人: Farzad Samie , Andrew L. Bartos , Chunhao J. Lee
- 申请人地址: US MI Detroit
- 专利权人: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
- 当前专利权人: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
- 当前专利权人地址: US MI Detroit
- 主分类号: F16H31/00
- IPC分类号: F16H31/00 ; G06F19/00
摘要:
A vehicle includes a front-wheel drive (FWD) transmission having a case, a selectable one-way clutch (SOWC) indexed to the case, pressurized fluid, and a valve body assembly (VBA). The VBA has a piston in communication with the fluid, a return spring, and an actuator plate in continuous contact with or connected to each of the piston and a shift lever of the SOWC. Fluid moving the piston and plate in one direction locks the SOWC to enable a reverse mode, and the spring moves the piston and the plate in another direction to unlock the SOWC in a forward mode. A method prevents spin losses in the FWD transmission by positioning a two-mode SOWC within a case, positioning a VBA adjacently and externally to the case, and admitting pressurized fluid into the VBA to engage the SOWC only during a reverse operating mode.
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