发明名称 |
Control apparatus for an automatic transmission. |
摘要 |
<p>An improved adaptive line pressure control which detects the occurrence of run-through (i.e. friction element engagement starts after damping action of accumulator has ceased) and overrides the normal adaptive pressure control in response to a detected run-through condition so that the line pressure during subsequent shifting is increased instead of decreased. A run-through condition is detected by periodically sampling the transmission speed ratio in the course of the inertia phase of an upshift from a lower speed ratio to an upper speed ratio, and determining the average ratio for the upshift. If the average ratio is within a reference amount of the normal value (ratio midpoint), the adaptive control is allowed to update the adaptive pressure value in relation to the difference between the measured shift time and a desired shift time. If the average ratio exceeds the normal value (midpoint) by more than the reference amount, a run-through is detected, and the adaptive pressure amount is increased regardless of the measured shift time. <IMAGE></p> |
申请公布号 |
EP0574061(A1) |
申请公布日期 |
1993.12.15 |
申请号 |
EP19930201435 |
申请日期 |
1993.05.19 |
申请人 |
GENERAL MOTORS CORPORATION |
发明人 |
DEBS, WILLIAM ERNEST;MOSES, ROBERT LOWELL |
分类号 |
F16H61/12;F16H59/68;F16H61/00;F16H61/04;F16H61/06;(IPC1-7):F16H61/06 |
主分类号 |
F16H61/12 |
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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