发明名称 |
Shift control system for automatic transmission |
摘要 |
A shift control system for an automatic transmission mounted on an automotive vehicle. The shift control system comprises a plurality of frictional elements including at least an engaging-side frictional element which is able to make a shift for the automatic transmission upon being engaged by increasing a hydraulic pressure of a hydraulic fluid to be supplied to the engaging-side frictional element. Additionally, a controller is provided to be programmed to carry out (a) changing a control for engaging the engaging-side frictional element between in a first condition in which a speed of progression in the shift is managed mainly in accordance with a volume of the hydraulic fluid to be supplied to the engaging-side frictional element itself and in a second condition in which the shift progresses regardless of the volume of hydraulic fluid to be applied to the engaging-side frictional element itself; and (b) accomplishing a volume control for the engaging-side frictional element from a timing immediately after a decision of the shift under a command hydraulic pressure of the hydraulic fluid to be supplied to the engaging-side frictional element in the second condition, the command hydraulic pressure having a lower limit value for securing that a piston stroke of the engaging-side frictional element completes within a predetermined time.
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申请公布号 |
US2002037784(A1) |
申请公布日期 |
2002.03.28 |
申请号 |
US20010953968 |
申请日期 |
2001.09.18 |
申请人 |
JATCO TRANSTECHNOLOGY LTD. |
发明人 |
SAITO YUJI |
分类号 |
F16H61/04;F16H61/06;(IPC1-7):F16H61/04 |
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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