发明名称 |
SPEED CHANGE CONTROL SYSTEM FOR INDUSTRIAL VEHICLE |
摘要 |
<p>A speed change control system for industrial vehicle, includes: a speed ratio detecting unit that detects a speed ratio of speeds of an input shaft and of an output shaft of a torque converter; speed changer for operating based on the torque converter speed ratio that shifts up or down a speed stage of a transmission in response to the detected speed ratio; a braking detection unit that detects an operation of a braking device for traveling; and a downshift limit unit that permits a downshift to a 1st speed by the speed changer when a non-operation of the braking device is detected by the braking detection unit and limits a lowest speed stage upon downshift by the speed changer to a 2nd speed when an operation of the braking device is detected.</p> |
申请公布号 |
EP2098761(B1) |
申请公布日期 |
2012.08.22 |
申请号 |
EP20070832886 |
申请日期 |
2007.11.30 |
申请人 |
HITACHI CONSTRUCTION MACHINERY CO., LTD. |
发明人 |
HYODO, KOJI;TANAKA, TETSUJI;SAKAI, EIICHI |
分类号 |
F16H61/18;E02F9/20;F16H59/18;F16H59/40;F16H59/42;F16H59/54;F16H61/68 |
主分类号 |
F16H61/18 |
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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