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公开(公告)号：US09599127B2
公开(公告)日：2017-03-21
申请号：US14159942
申请日：2014-01-21
申请人： DEERE & COMPANY
CPC分类号： F15B1/26 , F04B23/02 , F04F1/02 , F15B2211/20592 , F15B2211/89 , Y10T137/85978 , Y10T137/86019 , Y10T137/86043 , Y10T137/86083 , Y10T137/86187 , Y10T137/86348
摘要： The invention relates to an system for supplying a hydraulic circuit with hydraulic fluid. The system includes a working reservoir and an auxiliary reservoir connected to the working reservoir by a hydraulic line. An air pump has an inlet connected to a suction line that opens into a liquid-free portion of the auxiliary reservoir so that a negative pressure can be built up in the auxiliary reservoir relative to the atmospheric ambient pressure. The air pump inlet is also connected to a control line, which comprises a control opening which is covered by the hydraulic fluid in the working reservoir, at least before the air pump is started up.
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公开(公告)号：US09752675B2
公开(公告)日：2017-09-05
申请号：US14860925
申请日：2015-09-22
申请人： Deere & Company
CPC分类号： F16H61/0021 , B60W2300/15 , F16H59/14 , F16H59/46 , F16H61/12 , F16H2059/147 , F16H2061/1232 , Y10T477/692 , Y10T477/6939 , Y10T477/69395 , Y10T477/693958 , Y10T477/693962
摘要： A transmission control circuit for controlling a system pressure provided by a pressure pump in a transmission. The circuit includes a pressure control valve and an electronic control unit. Load states and operating states of the working machine can be detected by the control unit and transmission input torque limits associated with the load states and state values representing at least one first operating state and state values representing at least one second operating state are stored therein. The first operating state corresponds with the maximum system pressure and the second operating state corresponds with a reduced system pressure compared to the maximum system pressure. The circuit includes a pressure limiting valve activated by the control unit to overrule the pressure control valve in order to variably set the reduced system pressure.
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公开(公告)号：US20160169252A9
公开(公告)日：2016-06-16
申请号：US14159942
申请日：2014-01-21
申请人： Deere & Company
CPC分类号： F15B1/26 , F04B23/02 , F04F1/02 , F15B2211/20592 , F15B2211/89 , Y10T137/85978 , Y10T137/86019 , Y10T137/86043 , Y10T137/86083 , Y10T137/86187 , Y10T137/86348
摘要： The invention relates to an system for supplying a hydraulic circuit with hydraulic fluid. The system includes a working reservoir and an auxiliary reservoir connected to the working reservoir by a hydraulic line. An air pump has an inlet connected to a suction line that opens into a liquid-free portion of the auxiliary reservoir so that a negative pressure can be built up in the auxiliary reservoir relative to the atmospheric ambient pressure. The air pump inlet is also connected to a control line, which comprises a control opening which is covered by the hydraulic fluid in the working reservoir, at least before the air pump is started up.
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公开(公告)号：US20150275925A1
公开(公告)日：2015-10-01
申请号：US14159942
申请日：2014-01-21
申请人： Deere & Company
CPC分类号： F15B1/26 , F04B23/02 , F04F1/02 , F15B2211/20592 , F15B2211/89 , Y10T137/85978 , Y10T137/86019 , Y10T137/86043 , Y10T137/86083 , Y10T137/86187 , Y10T137/86348
摘要： The invention relates to an system for supplying a hydraulic circuit with hydraulic fluid. The system includes a working reservoir and an auxiliary reservoir connected to the working reservoir by a hydraulic line. An air pump has an inlet connected to a suction line that opens into a liquid-free portion of the auxiliary reservoir so that a negative pressure can be built up in the auxiliary reservoir relative to the atmospheric ambient pressure. The air pump inlet is also connected to a control line, which comprises a control opening which is covered by the hydraulic fluid in the working reservoir, at least before the air pump is started up.
摘要翻译： 本发明涉及一种用于向液压回路提供液压流体的系统。 该系统包括通过液压管线连接到工作储存器的工作储存器和辅助储存器。 空气泵具有连接到吸入管线的入口，该吸入管线通向辅助储存器的无液体部分，使得相对于大气环境压力可以在辅助储存器中建立负压。 空气泵入口还连接到控制线，控制线包括至少在空气泵启动之前由工作容器中的液压流体覆盖的控制开口。
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