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公开(公告)号：US20230011239A1
公开(公告)日：2023-01-12
申请号：US17756861
申请日：2020-10-13
申请人： KYB Corporation
发明人： Tsuyoshi HIRONAKA , Midori NAGASHIMA , Ken TSUKUI , Kazuya MUROTA
摘要： A working fluid supply system is provided with: a first oil pump and a second oil pump driven by an engine; a switching valve configured to cause a discharge passage of the second oil pump to communicate with at least one of a supply passage and a first drain passage; and a controller configured to switch the switching valve. The controller is configured to switch the switching valve by spending a switching time that is set in accordance with a degree of pressure variation predicted to be caused in the supply passage when the switching valve is switched instantaneously.
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公开(公告)号：US20220389944A1
公开(公告)日：2022-12-08
申请号：US17755763
申请日：2020-10-13
申请人： KYB Corporation
发明人： Tsuyoshi HIRONAKA , Midori NAGASHIMA , Ken TSUKUI , Kazuya MUROTA
摘要： A working-fluid supply system includes: a first pump and a second pump driven by an engine; a first switching valve capable of switching a supply target of the second pump to either one of the discharge side and the suction side of the first pump; a first switching control unit configured to perform a switching control of the first switching valve; and a first pressure control unit configured to perform a control such that pressure on the suction side of the first pump becomes a predetermined first pressure when the first switching valve is switched such that the supply target of the second pump becomes the suction side of the first pump.
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