发明名称 |
POWER TRANSMISSION DEVICE |
摘要 |
A power transmission device that transmits power from a motor to a wheel via a hydraulically driven friction engagement element and that includes a mechanical pump driven by the motor to produce a hydraulic pressure that is regulated by a pressure regulating valve; an electric pump that produces a hydraulic pressure; a switching mechanism that either switches an output pressure of the regulating valve or an output pressure of the electric pump to a servo of the engagement element based upon a signal pressure, and a drain valve that opens to drain oil when a hydraulic pressure of a preset pressure or more is applied, and the switching mechanism connects to the drain valve to allow communication between the electric pump and the drain valve in the first state, and shut off communication between the electric pump and the drain valve. |
申请公布号 |
US2012144818(A1) |
申请公布日期 |
2012.06.14 |
申请号 |
US201113281809 |
申请日期 |
2011.10.26 |
申请人 |
SHIMIZU TETSUYA;ISHIKAWA TOMOMI;JINNO TOMOYA;TSUCHIDA KENICHI;ISHIKAWA KAZUNORI;AISIN AW CO., LTD. |
发明人 |
SHIMIZU TETSUYA;ISHIKAWA TOMOMI;JINNO TOMOYA;TSUCHIDA KENICHI;ISHIKAWA KAZUNORI |
分类号 |
F15B11/08 |
主分类号 |
F15B11/08 |
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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