专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

11. 发明授权

US4841813A Oil pressure circuit for an automatic transmission 失效
标题翻译：用于自动变速箱的油压回路
公开(公告)号：US4841813A
公开(公告)日：1989-06-27
申请号：US187364
申请日：1988-04-28
申请人： Takuji Fujiwara , Kozo Ishii , Tatsutoshi Mizobe
发明人： Takuji Fujiwara , Kozo Ishii , Tatsutoshi Mizobe
IPC分类号： F16H61/02 , F16H61/04 , F16H61/21
CPC分类号： F16H61/0437 , F16H61/0206 , F16H2061/0466 , F16H61/21 , Y10T477/691 , Y10T477/69387
摘要： The multistage transmission gear mechanism is provided with a first and second coupling means for shifting speed stages, each being of a type operable hydraulically and adapted to allow four speed stages from first to fourth speed stages to be selected in accordance with a combination between a coupled state and an uncoupled state of the first and second coupling means. A third coupling means is further provided for ensuring engine braking.The second coupling means is engaged or coupled by a first pilot pressure generated by a first solenoid at the second, third and fourth speed stages. The first coupling means is coupled by a second pilot pressure generated by a second solenoid at the third and fourth speed stages. The third coupling means is coupled at the second and third speed stages.A third solenoid is provided for generating a third pilot pressure which prevails over the first pilot pressure and controls shifting the second coupling means at the third speed stage.At shifting between the second and third speed stages, the second pilot pressure prevails over the first pilot pressure to being the second coupling means into a state of its shifting being controlled by the third pilot pressure. At this time, shifting the third coupling means is controlled by the first pilot pressure to avoid a temporary engagement of all the three coupling means, thus preventing a transmission shock.
摘要翻译：多级传动齿轮机构设置有用于移动速度级的第一和第二联接装置，每个都是液压可操作的类型，并且适于允许根据耦合的第二至第四速度级之间的组合来选择来自第一至第四速度级的四个速度级状态和第一和第二耦合装置的非耦合状态。还提供了一种用于确保发动机制动的第三联接装置。第二联接装置通过在第二，第三和第四速度级由第一螺线管产生的第一先导压力接合或联接。第一联接装置通过在第三和第四速度级由第二螺线管产生的第二先导压力联接。第三联接装置在第二和第三速度级联接。第三螺线管被提供用于产生超过第一先导压力的第三先导压力并且控制在第三速度级移动第二联接装置。在第二和第三转速级之间移动时，第二先导压力超过第一先导压力，以使第二联接装置进入其变速状态，由第三先导压力控制。此时，通过第一先导压力来控制第三联接装置的移动，以避免所有三个联接装置的临时接合，从而防止传输冲击。

IPRDB

热门服务

关于我们

友情链接

联系方式