发明名称 |
Vorrichtung und Verfahren einer Regelung für den Gangwechsel eines automatischen Kraftfahrzeuggetriebes |
摘要 |
A speed change control method and apparatus for a vehicular automatic transmission having a first-speed clutch for establishing a first speed and a second-speed clutch for establishing a second speed, includes subjection of at least a duty ratio Dr of a second-speed solenoid valve for supplying oil pressure to the second-speed clutch to feedback control, so that the first-speed clutch is engaged while disengaging the second-speed clutch. This thereby increases a turbine rotational speed Nt toward the first-speed synchronous rotational speed. Further, an upper limit value Dmax of the duty ratio Dr is set, and the duty ratio Dr is subject to feedback control within a resultant duty ratio range, thereby preventing the duty ratio Dr from being set at an excessive value caused by a delay in the rise of the oil pressure. As a result, even if a depression of an accelerator pedal is suddenly increased during a downshifting process, an interlock problem can be prevented, thereby ensuring smooth speed change. <IMAGE> <IMAGE> |
申请公布号 |
DE69305456(T2) |
申请公布日期 |
1997.05.22 |
申请号 |
DE1993605456T |
申请日期 |
1993.08.12 |
申请人 |
MITSUBISHI JIDOSHA KOGYO K.K., TOKIO/TOKYO, JP |
发明人 |
FUJITA, KENJIRO, KUSATSU-SHI, SHIGA, JP;USUKI, KATSUTOSHI, NISHIKYO-KU, KYOTO-SHI, KYOTO,, JP |
分类号 |
F16H59/46;F16H61/06;F16H61/08;(IPC1-7):F16H61/06;B60K41/10 |
主分类号 |
F16H59/46 |
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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