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公开(公告)号：US20190228637A1
公开(公告)日：2019-07-25
申请号：US15877664
申请日：2018-01-23
Applicant: Caterpillar Inc.
Inventor： Dayao Chen , Aleksandar Egelja , Kalpeshkumar N. Patel
Abstract: A monitoring system includes a hydraulic accumulator including a piston movably disposed therein. At least one seal encompasses the piston. A first pressure sensor is configured to monitor pressure of a first fluid in a first chamber. A second pressure sensor is configured to monitor pressure of a second fluid in a second chamber. A first temperature sensor is disposed in the first chamber and configured to monitor the temperature of the first fluid. A second temperature sensor is disposed in the second chamber and configured to monitor the temperature of the second fluid. An electronic control unit is in communication with the sensors and programmed to in response to receiving pressure signals from the pressure sensors and temperature signals from the temperature sensors, determine a wear volume of the at least one seal; and compare the wear volume of the at least one seal to a predetermined threshold wear volume of the at least one seal to determine the remaining useful life of the hydraulic accumulator.
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公开(公告)号：US09534616B2
公开(公告)日：2017-01-03
申请号：US14599220
申请日：2015-01-16
Applicant: Caterpillar Inc.
Inventor： Santosh Ancha , Aleksandar Egelja , Hongliu Du , Takayuki Sasaki
CPC classification number: F15B19/005 , E02F9/2235 , E02F9/2278 , E02F9/2292 , E02F9/2296 , F15B19/007 , F15B2211/20523 , F15B2211/20546 , F15B2211/20576 , F15B2211/6309 , F15B2211/633 , F15B2211/6333 , F15B2211/6652 , F15B2211/855 , F15B2211/862 , F15B2211/87 , F15B2211/8752
Abstract: A system for determining an estimated output from a variable displacement hydraulic pump includes a prime mover, a torque sensor, a pressure sensor, and a displacement sensor. A controller is configured to determine the output torque from the prime mover, determine an input torque to the variable displacement hydraulic pump based upon the output torque, determine an output from one of the pressure sensor and the displacement sensor based upon the signals. The controller is further configured to determine a failure of another of the pressure sensor and the displacement sensor and determine an estimated output from the another of the pressure sensor and the displacement sensor based upon the input torque to the variable displacement hydraulic pump and the output from the one of the pressure sensor and the displacement sensor.
Abstract translation: 用于确定来自可变排量液压泵的估计输出的系统包括原动机，扭矩传感器，压力传感器和位移传感器。 控制器被配置为确定来自原动机的输出扭矩，基于输出扭矩确定到可变排量液压泵的输入扭矩，基于该信号确定压力传感器和位移传感器之一的输出。 所述控制器还被配置成确定所述压力传感器和所述位移传感器中的另一个的故障，并基于所述可变排量液压泵的输入扭矩确定来自所述压力传感器和所述位移传感器中的另一个的估计输出， 压力传感器和位移传感器之一。
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公开(公告)号：US10337532B2
公开(公告)日：2019-07-02
申请号：US15367675
申请日：2016-12-02
Applicant: Caterpillar Inc.
Inventor： Pengfei Ma , Aleksandar Egelja , Justin Speichinger , Shuhei Orimoto , Tetsuya Yoshino , Hideki Nakajima , Shogo Tada , Aleem Junaidi , Bryan Johnson , Matthew Beschorner
IPC: F15B13/04 , F15B11/08 , F15B13/02 , F15B21/14 , F15B1/26 , F15B13/044 , F15B11/00 , F15B11/024
Abstract: A hydraulic system is disclosed. The hydraulic system may include a source of pressurized fluid; a tank; a hydraulic actuator including a first chamber and a second chamber; a first independent metering valve disposed between and fluidly connected to the source, the tank, and the first chamber of the hydraulic actuator; and a second independent metering valve disposed between and fluidly connected to the source, the tank, and the second chamber of the hydraulic actuator. Each of the first independent metering valve and the second independent metering valve may include a spool and a valve actuator disposed on one side of the spool. The valve actuator may include a push coil, a pull coil, and a force feedback mechanism configured to balance a force of the push coil and the pull coil.
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Patent Agency Ranking
公开(公告)号：US09404516B1
公开(公告)日：2016-08-02
申请号：US14599238
申请日：2015-01-16
Applicant: Caterpillar Inc.
Inventor： Hongliu Du , Aleksandar Egelja , Santosh Ancha
CPC classification number: F15B19/005 , E02F9/2235 , E02F9/2292 , E02F9/2296 , E02F9/268 , F15B15/20 , F15B19/007 , F15B2211/20546 , F15B2211/20576 , F15B2211/6309 , F15B2211/633 , F15B2211/6333 , F15B2211/665 , F15B2211/87 , F15B2211/875 , G01M15/05 , G01N2030/326
Abstract: A system for determining an estimated output from a variable displacement hydraulic pump includes a prime mover, and torque, pressure, and displacement sensors. A controller determines the output torque from the prime mover, determines an input torque to the variable displacement hydraulic pump based upon the output torque, determines an output from one of the pressure sensor and the displacement sensor, and determines an inertia torque loss based upon the angular acceleration of the prime mover. The controller further determines a failure of another of the pressure sensor and the displacement sensor and determines an estimated output from the another of the pressure sensor and the displacement sensor based upon the input torque to the variable displacement hydraulic pump, the output from the one of the pressure sensor and the displacement sensor, and the inertia torque loss.
Abstract translation: 用于确定来自可变排量液压泵的估计输出的系统包括原动机和扭矩，压力和位移传感器。 控制器确定来自原动机的输出扭矩，基于输出转矩确定到可变排量液压泵的输入扭矩，确定来自压力传感器和位移传感器中的一个的输出，并且基于 原动机的角加速度。 控制器进一步确定另一个压力传感器和位移传感器的故障，并且基于来自可变排量液压泵的输入扭矩确定压力传感器和位移传感器中的另一个的估计输出， 压力传感器和位移传感器，以及惯性转矩损失。
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公开(公告)号：US10467881B2
公开(公告)日：2019-11-05
申请号：US15877664
申请日：2018-01-23
Applicant: Caterpillar Inc.
Inventor： Dayao Chen , Aleksandar Egelja , Kalpeshkumar N. Patel
IPC: G01F1/36 , G08B21/18 , G01K13/02 , G01L19/12 , G01L19/00 , F15B20/00 , F15B19/00 , G01M15/00 , G01M15/08
Abstract: A monitoring system includes a hydraulic accumulator including a piston movably disposed therein. At least one seal encompasses the piston. A first pressure sensor is configured to monitor pressure of a first fluid in a first chamber. A second pressure sensor is configured to monitor pressure of a second fluid in a second chamber. A first temperature sensor is disposed in the first chamber and configured to monitor the temperature of the first fluid. A second temperature sensor is disposed in the second chamber and configured to monitor the temperature of the second fluid. An electronic control unit is in communication with the sensors and programmed to in response to receiving pressure signals from the pressure sensors and temperature signals from the temperature sensors, determine a wear volume of the at least one seal; and compare the wear volume of the at least one seal to a predetermined threshold wear volume of the at least one seal to determine the remaining useful life of the hydraulic accumulator.
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公开(公告)号：US20180156244A1
公开(公告)日：2018-06-07
申请号：US15367675
申请日：2016-12-02
Applicant: Caterpillar Inc.
Inventor： Pengfei Ma , Aleksandar Egelja , Justin Speichinger , Shuhei Orimoto , Tetsuya Yoshino , Hideki Nakajima , Shogo Tada , Aleem Junaidi , Bryan Johnson , Matthew Beschorner
CPC classification number: F15B13/0402 , F15B1/26 , F15B11/003 , F15B11/024 , F15B11/08 , F15B13/021 , F15B13/024 , F15B13/044 , F15B13/0442 , F15B21/14 , F15B2011/0246 , F15B2211/50
Abstract: A hydraulic system is disclosed. The hydraulic system may include a source of pressurized fluid; a tank; a hydraulic actuator including a first chamber and a second chamber; a first independent metering valve disposed between and fluidly connected to the source, the tank, and the first chamber of the hydraulic actuator; and a second independent metering valve disposed between and fluidly connected to the source, the tank, and the second chamber of the hydraulic actuator. Each of the first independent metering valve and the second independent metering valve may include a spool and a valve actuator disposed on one side of the spool. The valve actuator may include a push coil, a pull coil, and a force feedback mechanism configured to balance a force of the push coil and the pull coil.
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公开(公告)号：US09945396B2
公开(公告)日：2018-04-17
申请号：US15050593
申请日：2016-02-23
Applicant: Caterpillar Inc.
Inventor： Tonglin Shang , Aleksandar Egelja , Kalpesh Patel , Jiao Zhang , Pengfei Ma , Dayao Chen
CPC classification number: F15B11/024 , F01P5/04 , F01P7/044 , F15B1/024 , F15B1/027 , F15B1/04 , F15B21/14 , F15B2211/20569 , F15B2211/20576 , F15B2211/212 , F15B2211/50554 , F15B2211/7142
Abstract: A fluid system for a machine that includes a linkage. The fluid system includes an actuator, an accumulator, a pilot circuit, and a pressure reducing valve. The actuator is configured to manipulate the linkage. The accumulator is configured to store a fluid discharged by the actuator under pressure. The pilot circuit is fluidly coupled to the accumulator and is configured to receive the fluid from the accumulator. Further, the pressure reducing valve is positioned between the accumulator and the pilot circuit to regulate the pressure of the fluid delivered to the pilot circuit from the accumulator.
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公开(公告)号：US20170241445A1
公开(公告)日：2017-08-24
申请号：US15050593
申请日：2016-02-23
Applicant: Caterpillar Inc.
Inventor： Tonglin Shang , Aleksandar Egelja , Kalpesh Patel , Jiao Zhang , Pengfei Ma , Dayao Chen
IPC: F15B11/024 , F04D13/04 , F15B1/02 , F15B1/04 , F15B1/027
CPC classification number: F15B11/024 , F01P5/04 , F01P7/044 , F15B1/024 , F15B1/027 , F15B1/04 , F15B21/14 , F15B2211/20569 , F15B2211/20576 , F15B2211/212 , F15B2211/50554 , F15B2211/7142
Abstract: A fluid system for a machine that includes a linkage. The fluid system includes an actuator, an accumulator, a pilot circuit, and a pressure reducing valve. The actuator is configured to manipulate the linkage. The accumulator is configured to store a fluid discharged by the actuator under pressure. The pilot circuit is fluidly coupled to the accumulator and is configured to receive the fluid from the accumulator. Further, the pressure reducing valve is positioned between the accumulator and the pilot circuit to regulate the pressure of the fluid delivered to the pilot circuit from the accumulator.
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