发明名称 |
Adaptive transmission pressure control with run-through detection |
摘要 |
An improved adaptive line pressure control which detects the occurrence of run-through 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.
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申请公布号 |
US5289741(A) |
申请公布日期 |
1994.03.01 |
申请号 |
US19920894982 |
申请日期 |
1992.06.08 |
申请人 |
GENERAL MOTORS CORPORATION |
发明人 |
DEBS, WILLIAM E.;MOSES, ROBERT L. |
分类号 |
F16H61/12;F16H59/68;F16H61/00;F16H61/04;F16H61/06;(IPC1-7):B60K41/06 |
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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