发明名称 |
SPEED CHANGE CONTROL DEVICE FOR A CONTINUOUSLY VARIABLE TRANSMISSION |
摘要 |
A speed change control valve (7) houses a spool (8) of comprising a land (83) which can face a supply port (7P) supplying an oil pressure, and lands (84, 85) which can respectively face a pair of drain ports (7D, 7D) formed on either side of the supply port (7P). Output ports (7L, 7H) which allow a first and second oil chamber of an hydraulic cylinder to communicate selectively with the supply port (7P) or the drain ports (7D) according to the displacement of a spool (8), are provided in the speed change control valve (7). In the neutral position of the spool (8), the lands (84, 85) respectively face the drain ports (7D), a width L1 of the land (83) is set to be equal to or greater than a width L1 of the supply port (7P), and a width L3 of the lands (84, 85) is set to a width at which the drain port (7D) can open. |
申请公布号 |
WO0123784(A1) |
申请公布日期 |
2001.04.05 |
申请号 |
WO2000JP06548 |
申请日期 |
2000.09.25 |
申请人 |
NISSAN MOTOR CO., LTD.;NISHIO, MOTOHARU;OSHIDARI, TOSHIKAZU;SUGIHARA, JUN |
发明人 |
NISHIO, MOTOHARU;OSHIDARI, TOSHIKAZU;SUGIHARA, JUN |
分类号 |
F16H61/04;F16H61/00;F16H61/662;F16H61/664;F16H63/06;(IPC1-7):F16H61/00 |
主分类号 |
F16H61/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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