Patents by Inventor Qinghui Yuan

Qinghui Yuan has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20200256461
    Abstract: A hydraulic mechanical transmission includes a first hydraulic unit having a first shaft and a second hydraulic unit having a second shaft. The second hydraulic unit is connected in hydraulic fluid communication with the first hydraulic unit by high and low pressure lines. At least one of the first and second hydraulic units has variable displacement. A mechanical torque transfer arrangement transfers torque between the first shaft and the rotatable component of the second hydraulic unit. One of the first and second hydraulic units operates as a hydraulic pump and the other of the first and second hydraulic units operates as a hydraulic motor.
    Type: Application
    Filed: January 31, 2020
    Publication date: August 13, 2020
    Inventor: QingHui Yuan
  • Publication number: 20200124062
    Abstract: A system for damping mass-induced vibrations in a machine having a long boom or elongate member, the movement of which causes mass-induced vibration in such boom or elongate member. The system comprises at least one motion sensor operable to measure movement of such boom or elongate member resulting from mass-induced vibration, and a processing unit operable to control a first control valve spool in a pressure control mode and a second control valve spool in a flow control mode in order to adjust the hydraulic fluid flow to the load holding chamber of an actuator attached to the boom or elongate member to dampen the mass-induced vibration. The system further comprises a control manifold fluidically interposed between the actuator and control valve spools that causes the first and second control valve spools to operate, respectively, in pressure and flow control modes.
    Type: Application
    Filed: October 28, 2019
    Publication date: April 23, 2020
    Inventor: QingHui YUAN
  • Publication number: 20200124061
    Abstract: A system for compensating for drift or movement of a hydraulic actuator connected to a machine's boom or similar elongate member that is caused, at least in part, by damping of mass-induced vibration. The system comprises a processing unit and a plurality of sensors operable to collect data from a control valve connected to an actuator's load holding chamber and to calculate additional volume present therein due to vibration damping. Using the calculated additional volume, the processing unit determines a hydraulic fluid flow rate appropriate to substantially reduce or eliminate the additional volume. The processing unit combines this flow rate with the hydraulic fluid flow rate necessary to cause operation of the actuator in response to the machine's operator input, and provides signals to the control valve causing actuation of the valve to output hydraulic fluid to the actuator at a rate equal to the combined flow rates.
    Type: Application
    Filed: October 28, 2019
    Publication date: April 23, 2020
    Inventors: QingHui YUAN, Meng WANG, Michael RANNOW, Chad LARISH
  • Publication number: 20200124060
    Abstract: A system for damping mass-induced vibrations in a machine having a long boom or elongate member, the movement of which causes mass-induced vibration in such boom or elongate member. The system comprises multiple pressure sensors operable to measure pressure fluctuations in the hydraulic fluid pressures in the non-load holding and load holding chambers of a hydraulic actuator connected to the boom or elongate member that result from mass-induced vibration, and a processing unit operable to control a first control valve spool in a pressure control mode and a second control valve spool in a flow control mode in order to adjust hydraulic fluid flow to the actuator's load holding chamber to dampen the mass-induced vibration. The system further comprises a control manifold fluidically interposed between the actuator and control valve spools that causes the first and second control valve spools to operate, respectively, in pressure and flow control modes.
    Type: Application
    Filed: October 28, 2019
    Publication date: April 23, 2020
    Inventor: QingHui YUAN
  • Patent number: 10550935
    Abstract: A hydraulic mechanical transmission includes a first hydraulic unit having a first shaft and a second hydraulic unit having a second shaft. The second hydraulic unit is connected in hydraulic fluid communication with the first hydraulic unit by high and low pressure lines. At least one of the first and second hydraulic units has variable displacement. A mechanical torque transfer arrangement transfers torque between the first shaft and the rotatable component of the second hydraulic unit. One of the first and second hydraulic units operates as a hydraulic pump and the other of the first and second hydraulic units operates as a hydraulic motor.
    Type: Grant
    Filed: August 18, 2017
    Date of Patent: February 4, 2020
    Assignee: Eaton Intelligent Power Limited
    Inventor: QingHui Yuan
  • Patent number: 10487940
    Abstract: A hydraulic mechanical transmission includes a first hydraulic unit having a first shaft and a second hydraulic unit having a second shaft. The second hydraulic unit is connected in hydraulic fluid communication with the first hydraulic unit by high and low pressure lines. A mechanical torque transfer arrangement transfers torque between the first shaft of the first hydraulic unit and a rotatable housing of the second hydraulic unit. One of the first and second hydraulic units operates as a hydraulic pump and the other operates as a hydraulic motor, and both of the first and second hydraulic units have variable displacement.
    Type: Grant
    Filed: August 18, 2017
    Date of Patent: November 26, 2019
    Assignee: Eaton Intelligent Power Limited
    Inventors: QingHui Yuan, Matthew E. Creswick
  • Publication number: 20190356740
    Abstract: The present disclosure describes a hybrid, wireless sensor network architecture for monitoring, operating, controlling, or maintaining a fluid delivery and distribution system. The architecture includes intelligent fittings locatable at almost any location within the system and that are configured with sensor modules to make measurements of characteristics of a fluid passing therethrough or of component parameters, and with wireless communication modules to wireless communicate the measurements. The intelligent fittings may be used, via strategic location, to convert unintelligent components of the system into intelligent components at a cost lower than that required to replace the unintelligent components with intelligent components. The intelligent fittings may also replace unintelligent fittings to provide supplemental data corresponding to fluid characteristics at desired locations of a fluid delivery and distribution system.
    Type: Application
    Filed: February 1, 2018
    Publication date: November 21, 2019
    Inventors: QingHui YUAN, Jeffrey LOWINGER
  • Patent number: 10408211
    Abstract: A hydraulic system is provided to reduce a dead volume when pressurizing gas. The system includes a gas source, a gas output, a pressure vessel coupled to the gas source and the gas output, a hydraulic system that forces hydraulic fluid into the pressure vessel from the gas source to compress gas, and an overflow tank that receives overflow of hydraulic fluid once all gas has been expelled from the pressure vessel via the gas output.
    Type: Grant
    Filed: July 14, 2014
    Date of Patent: September 10, 2019
    Assignee: Eaton Intelligent Power Limited
    Inventor: QingHui Yuan
  • Publication number: 20190170170
    Abstract: In one aspect, a wireless transceiver is used to wirelessly connect various electrohydraulic components in a hydraulic system. In another aspect, a self-powered wireless hydraulic system includes a harvesting device for converting hydraulic energy into electrical energy. The electrical energy generated by the harvesting device can be used to power one or more electrohydraulic components and wireless transceivers. In another aspect, a self-powered wireless hydraulic system also includes a flow control device powered by the harvesting device for actively controlling the hydraulic flow through the harvesting device.
    Type: Application
    Filed: August 9, 2017
    Publication date: June 6, 2019
    Inventors: QingHui YUAN, Jeffrey LOWINGER
  • Patent number: 9995020
    Abstract: The present disclosure relates to fault detection, isolation and reconfiguration schemes, architectures and methods for use in electrohydraulic actuation systems for construction equipment. In one embodiment, a supervisory controller adapted to interface with a main controller of the construction vehicle is provided. A plurality of control nodes that interface with the supervisory controller are also disclosed, each of which includes pressure and position sensors. The nodes also include a first actuator control node for controlling operation of a first hydraulic actuator, a second actuator control node for controlling operation of a second hydraulic actuator, and a pump control node. The control system has an architecture in which faults are detected and isolated at the supervisory controller level and, where possible, within each of the control nodes at a sensor level, a component level, and a subsystem level.
    Type: Grant
    Filed: December 21, 2015
    Date of Patent: June 12, 2018
    Assignee: Eaton Intelligent Power Limited
    Inventors: QingHui Yuan, Michael Berne Rannow, Wade Leo Gehlhoff, Chris William Schottler, Vishal Mahulkar
  • Publication number: 20180051784
    Abstract: A hydraulic mechanical transmission includes a first hydraulic unit having a first shaft and a second hydraulic unit having a second shaft. The second hydraulic unit is connected in hydraulic fluid communication with the first hydraulic unit by high and low pressure lines. At least one of the first and second hydraulic units has variable displacement. A mechanical torque transfer arrangement transfers torque between the first shaft and the rotatable component of the second hydraulic unit. One of the first and second hydraulic units operates as a hydraulic pump and the other of the first and second hydraulic units operates as a hydraulic motor.
    Type: Application
    Filed: August 18, 2017
    Publication date: February 22, 2018
    Inventor: QingHui Yuan
  • Publication number: 20180051799
    Abstract: A hydraulic mechanical transmission includes a first hydraulic unit having a first shaft and a second hydraulic unit having a second shaft. The second hydraulic unit is connected in hydraulic fluid communication with the first hydraulic unit by high and low pressure lines. A valve having a variable orifice is positioned along the high and low pressure lines, and at least one of the first and second hydraulic units has a variable displacement. A mechanical torque transfer arrangement transfers torque between the first shaft of the first hydraulic unit and a rotatable component of the second hydraulic unit. In use, one of the first and second hydraulic units operates as a hydraulic pump and the other of the first and second hydraulic units operates as a hydraulic motor.
    Type: Application
    Filed: August 18, 2017
    Publication date: February 22, 2018
    Inventor: QingHui Yuan
  • Publication number: 20180051803
    Abstract: A hydraulic mechanical transmission includes a first hydraulic unit having a first shaft and a second hydraulic unit having a second shaft. The second hydraulic unit is connected in hydraulic fluid communication with the first hydraulic unit by high and low pressure lines. A mechanical torque transfer arrangement transfers torque between the first shaft of the first hydraulic unit and a rotatable housing of the second hydraulic unit. One of the first and second hydraulic units operates as a hydraulic pump and the other operates as a hydraulic motor, and both of the first and second hydraulic units have variable displacement.
    Type: Application
    Filed: August 18, 2017
    Publication date: February 22, 2018
    Inventors: QingHui Yuan, Matthew E. Creswick
  • Patent number: 9874233
    Abstract: A hydraulic drive system for driving a load includes a drive shaft; first and second hydraulic pumps driven by the drive shaft, and a control system that operates the hydraulic drive system in a plurality of modes including: a) a first mode where the second hydraulic pump pumps hydraulic fluid from a supply line to an accumulator; b) a second mode where the second hydraulic pump pumps hydraulic fluid from the accumulator to the supply line; c) a third mode where the second hydraulic pump pumps hydraulic fluid from the supply line to a reservoir; and d) a fourth mode where the second hydraulic pump pumps hydraulic fluid from the reservoir to the supply line. At least the second hydraulic pump is a variable displacement bidirectional pump.
    Type: Grant
    Filed: March 23, 2015
    Date of Patent: January 23, 2018
    Assignee: EATON CORPORATION
    Inventors: QingHui Yuan, Ankur Ganguli
  • Publication number: 20160186414
    Abstract: The present disclosure relates to fault detection, isolation and reconfiguration schemes, architectures and methods for use in electrohydraulic actuation systems for construction equipment. In one embodiment, a supervisory controller adapted to interface with a main controller of the construction vehicle is provided. A plurality of control nodes that interface with the supervisory controller are also disclosed, each of which includes pressure and position sensors. The nodes also include a first actuator control node for controlling operation of a first hydraulic actuator, a second actuator control node for controlling operation of a second hydraulic actuator, and a pump control node. The control system has an architecture in which faults are detected and isolated at the supervisory controller level and, where possible, within each of the control nodes at a sensor level, a component level, and a subsystem level.
    Type: Application
    Filed: December 21, 2015
    Publication date: June 30, 2016
    Inventors: QingHui Yuan, Michael Berne Rannow, Wade Leo Gehlhoff, Christopher William Schottler, Vishal Mahulkar
  • Patent number: 9377020
    Abstract: Methods for controlling the net-displacement of a rotary fluid pressure device are disclosed. One of the net-displacement control methods (47) includes obtaining a desired input parameter (23) and a relative position (21) of a first member (43) and a second member (35) of a fluid displacement mechanism. A determination of a first and second output value is then made for each of a plurality of volume chambers (45) when the volume chambers (45) are supplied with fluid at fluid inlet and fluid outlet conditions, respectively. A total output value is then computed for each of a plurality of control valve configurations (63) and compared to the desired input parameter (23). The control valve configuration (63) with the total output value most similar to the desired input parameter (23) is then selected. A plurality of control valves (15) are then actuated in accordance with the selected control valve configuration (63).
    Type: Grant
    Filed: May 27, 2014
    Date of Patent: June 28, 2016
    Assignee: Eaton Corporation
    Inventors: Brian Armstrong, Qinghui Yuan
  • Publication number: 20160153447
    Abstract: A hydraulic system is provided to reduce a dead volume when pressurizing gas. The system includes a gas source, a gas output, a pressure vessel coupled to the gas source and the gas output, a hydraulic system that forces hydraulic fluid into the pressure vessel from the gas source to compress gas, and an overflow tank that receives overflow of hydraulic fluid once all gas has been expelled from the pressure vessel via the gas output.
    Type: Application
    Filed: July 14, 2014
    Publication date: June 2, 2016
    Inventor: QingHui YUAN
  • Patent number: 9346207
    Abstract: A hydraulic circuit architecture for use in a drive circuit having a hydraulic pump for driving a load is disclosed. The hydraulic circuit architecture includes a flow control valve for controlling a hydraulic fluid flow rate supplied from the hydraulic pump to the load. The hydraulic circuit architecture also includes a hydraulic fluid accumulator arranged in parallel with respect to the flow control valve. Hydraulic circuit architectures having multiple accumulators arranged in parallel with respect to the flow control valve are also disclosed.
    Type: Grant
    Filed: January 23, 2015
    Date of Patent: May 24, 2016
    Assignee: Eaton Corporation
    Inventor: QingHui Yuan
  • Patent number: 9222242
    Abstract: The present disclosure relates to fault detection, isolation and reconfiguration schemes, architectures and methods for use in electrohydraulic actuation systems for construction equipment. In one embodiment, a supervisory controller adapted to interface with a main controller of the construction vehicle is provided. A plurality of control nodes that interface with the supervisory controller are also disclosed, each of which includes pressure and position sensors. The nodes also include a first actuator control node for controlling operation of a first hydraulic actuator, a second actuator control node for controlling operation of a second hydraulic actuator, and a pump control node. The control system has an architecture in which faults are detected and isolated at the supervisory controller level and, where possible, within each of the control nodes at a sensor level, a component level, and a subsystem level.
    Type: Grant
    Filed: January 8, 2015
    Date of Patent: December 29, 2015
    Assignee: Eaton Corporation
    Inventors: QingHui Yuan, Michael Berne Rannow, Wade Leo Gehlhoff, Christopher William Schottler, Vishal Mahulkar
  • Publication number: 20150361996
    Abstract: A hydraulic drive system for driving a load includes a drive shaft; first and second hydraulic pumps driven by the drive shaft, and a control system that operates the hydraulic drive system in a plurality of modes including: a) a first mode where the second hydraulic pump pumps hydraulic fluid from a supply line to an accumulator; b) a second mode where the second hydraulic pump pumps hydraulic fluid from the accumulator to the supply line; c) a third mode where the second hydraulic pump pumps hydraulic fluid from the supply line to a reservoir; and d) a fourth mode where the second hydraulic pump pumps hydraulic fluid from the reservoir to the supply line.
    Type: Application
    Filed: March 23, 2015
    Publication date: December 17, 2015
    Inventors: QingHui Yuan, Ankur Ganguli