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公开(公告)号：US20150308469A1
公开(公告)日：2015-10-29
申请号：US14660192
申请日：2015-03-17
Applicant: Caterpillar Inc.
Inventor： Matthew J. Beschorner , Eric Hughes , Naoto Funabiki , Tomohiro Oyama , Brett J. Janson
CPC classification number: F15B21/042 , E02F9/2235 , E02F9/226 , E02F9/2292 , E02F9/2296 , F15B19/00 , F15B2211/41563 , F15B2211/62 , F15B2211/6313 , F15B2211/6343 , F15B2211/66 , F15B2211/6652
Abstract: A control system for a machine is disclosed. The control system may have a bypass passage situated to allow fluid to bypass an actuator, and a warmup valve disposed within the bypass passage that is movable between flow-passing and-blocking positions. A controller is configured to move the warmup valve to the flow-passing position, fix a displacement position of the pump, compare the pressure of the fluid of the actuator with a threshold, and move the warmup valve to the flow-blocking position and reduce a pump outlet pressure when the pressure of the fluid is greater than the threshold. The controller may be configured to move the warmup valve to the flow-passing position, fix a displacement position of the pump, and adjust an input speed of the pump in response to the signal.
Abstract translation: 公开了一种用于机器的控制系统。 控制系统可以具有旁路通道，其设置成允许流体绕过致动器，以及设置在旁通通道内的预热阀，其可在流动和阻塞位置之间移动。 控制器被配置为将暖机阀移动到流通位置，固定泵的位移位置，将致动器的流体的压力与阈值进行比较，并将加热阀移动到阻流位置并减小 当流体的压力大于阈值时的泵出口压力。 控制器可以被配置为将暖机阀移动到流通位置，固定泵的位移位置，并响应于该信号来调节泵的输入速度。
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公开(公告)号：US09803665B2
公开(公告)日：2017-10-31
申请号：US14660192
申请日：2015-03-17
Applicant: Caterpillar Inc.
Inventor： Matthew J. Beschorner , Eric Hughes , Naoto Funabiki , Tomohiro Oyama , Brett J. Janson
CPC classification number: F15B21/042 , E02F9/2235 , E02F9/226 , E02F9/2292 , E02F9/2296 , F15B19/00 , F15B2211/41563 , F15B2211/62 , F15B2211/6313 , F15B2211/6343 , F15B2211/66 , F15B2211/6652
Abstract: A control system for a machine is disclosed. The control system may have a bypass passage situated to allow fluid to bypass an actuator, and a warmup valve disposed within the bypass passage that is movable between flow-passing and-blocking positions. A controller is configured to move the warmup valve to the flow-passing position, fix a displacement position of the pump, compare the pressure of the fluid of the actuator with a threshold, and move the warmup valve to the flow-blocking position and reduce a pump outlet pressure when the pressure of the fluid is greater than the threshold. The controller may be configured to move the warmup valve to the flow-passing position, fix a displacement position of the pump, and adjust an input speed of the pump in response to the signal.
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公开(公告)号：US20170198831A1
公开(公告)日：2017-07-13
申请号：US14992452
申请日：2016-01-11
Applicant: Caterpillar Inc.
Inventor： Matthew Beschorner , Naoto Funabiki , Brett Janson
CPC classification number: G01M3/2876 , E02F9/2203 , F15B19/00 , F15B20/005 , F15B2211/50518 , F15B2211/50536 , F15B2211/5157 , F15B2211/5159 , F15B2211/526 , F15B2211/6309 , F15B2211/6313 , F15B2211/665 , F15B2211/855
Abstract: A system for monitoring performance of a relief valve in a hydraulic system having a hydraulic actuator includes a supply discharge line fluidly coupled between a source of pressurized fluid and a fluid chamber of the actuator. The supply discharge line has a supply valve disposed therein. The system also includes a main relief line and a line relief line fluidly coupled to the supply discharge line. The main relief line includes a main relief valve and is disposed upstream of the supply valve while the line relief line includes a line relief valve and is disposed downstream of the supply valve. The line relief valve is configured to open at a pressure value greater than that used in the main relief valve. A controller compares fluid pressures in the main relief line and the line relief line to determine if the line relief valve is leaking.
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