发明名称 |
Automatic transmission |
摘要 |
An automatic transmission has a transmission control section performing a control so that a transmission ratio defined as input rpm/output rpm of the automatic transmission becomes a target transmission ratio, a slip control section slip-controlling a frictional engagement element in the automatic transmission so that the input rpm becomes a value obtained by multiplying the output rpm by the target transmission ratio also adding a predetermined slip revolution speed; and an abnormality judgment section judging abnormality in the automatic transmission. When the slip-control is not in progress, if an actual transmission ratio is out of a predetermined range of the target transmission ratio, the abnormality judgment section judges that abnormality occurs. When the slip-control is in progress, if a value obtained by correcting the actual transmission ratio on the basis of the slip revolution speed is out of the predetermined range, the abnormality judgment section judges that abnormality occurs.
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申请公布号 |
EP2447578(A1) |
申请公布日期 |
2012.05.02 |
申请号 |
EP20110186809 |
申请日期 |
2011.10.27 |
申请人 |
JATCO LTD |
发明人 |
NAGASHIMA, FUMITAKA;TASAKA, HAJIME;KAWAGUCHI, TAKATERU;AIZAWA, TAKEO;KANEKO, KAKUZOU |
分类号 |
F16H61/12;B60K6/48;B60K6/547;B60W10/02;B60W10/115;F16H59/46 |
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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