Having Means To Produce Digital Pulses Patents (Class 251/129.05)
  • Patent number: 10982792
    Abstract: An object of the present invention is to provide an electrically operated valve capable of more accurately detecting the position of a valve body. In order to achieve the above object, the electrically operated valve of the present invention comprises a valve body, a driver configured to move the valve body along a first axis, a rotation shaft configured to rotate the driver around the first axis, a permanent magnet member, and an angle sensor. The permanent magnet member is disposed on the rotation shaft and configured to rotate with the rotation shaft. The angle sensor is configured to detect a rotation angle of a permanent magnet included in the permanent magnet member. The angle sensor is disposed above the permanent magnet.
    Type: Grant
    Filed: January 30, 2018
    Date of Patent: April 20, 2021
    Assignee: FUJIKOKI CORPORATION
    Inventors: Satoshi Uehara, Yusuke Arai, Takeshi Hosoya
  • Patent number: 10968872
    Abstract: An exhaust gas recirculation valve warming device includes an exhaust throttle arranged in an exhaust passage, an exhaust gas recirculation passage that extends from a portion of the exhaust passage that is upstream of the exhaust throttle and is connected to an intake passage, an exhaust gas recirculation valve arranged in the exhaust gas recirculation passage, and a branch passage that extends from a portion of the exhaust gas recirculation passage that is upstream of the exhaust gas recirculation valve in a direction in which exhaust gas flows, in which the branch passage is connected to a portion of the exhaust passage that is downstream of the exhaust throttle. The exhaust gas recirculation valve includes a valve passage that forms part of the exhaust gas recirculation passage and a warming passage that forms part of the branch passage.
    Type: Grant
    Filed: February 28, 2020
    Date of Patent: April 6, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Keishi Nanno, Koichi Nishitani
  • Patent number: 10927898
    Abstract: A combination shaft including a first shaft including an axial protrusion including a first circumferential surface defining a first outer diameter and a second circumferential surface defining a second outer diameter, and a second shaft having a cavity therein configured to receive at least a portion of the first shaft and being configured to drive an air valve, having internal threads, and defining at least a first inner radial surface having a first inner diameter and a second inner radial surface having second inner diameter, the internal threads being engagable with the external threads to prevent axial movement between the first shaft and the second shaft and the first inner radial surface being engagable with the first outer radial surface and the second inner radial surface being engagable with the second outer radial surface to provide radial centering of the first shaft to the second shaft.
    Type: Grant
    Filed: May 31, 2019
    Date of Patent: February 23, 2021
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Francis P. Marocchini, Glenn Gradischer
  • Patent number: 10876648
    Abstract: A solenoid valve includes a housing, a bobbin and an armature. The bobbin is received at least partially within the housing and has and internal passage and a body about which a coil is provided. The armature is moveable relative to a valve seat and the valve includes an armature stop received in the internal passage with a press-fit so that it is engaged by the armature in one position of the armature to limit movement of the armature away from the valve seat. The valve also has a biasing member located at least partially between the armature and the armature stop, the armature has a reduced diameter portion received at least partially within the biasing member, and wherein the reduced diameter portion engages the armature stop in the open position of the valve.
    Type: Grant
    Filed: May 20, 2019
    Date of Patent: December 29, 2020
    Assignee: Walbro LLC
    Inventors: Dale P. Kus, David L. Thomas
  • Patent number: 10571875
    Abstract: To provide an electric valve control device capable of preventing a delay at the time of starting a control of an electric valve by shortening a standby time of an air conditioner or the like when power is input again or a sleep mode is cancelled and an electric valve device including the same. After receiving a power-off signal predicting a power-off operation of an electric valve 9 or a sleep transition signal predicting a sleep mode transition operation thereof from an outside, (current) valve opening degree information at the time of stopping an operation of the electric valve 9 is stored in an EEPROM (a nonvolatile storage unit) 11c. At the time of inputting power again or cancelling a sleep mode, the current (immediately precedent) valve opening degree information stored in the EEPROM 11c is read from the EEPROM 11c to resume a control of the electric valve 9.
    Type: Grant
    Filed: October 26, 2017
    Date of Patent: February 25, 2020
    Assignee: FUJIKOKI CORPORATION
    Inventors: Yoshio Ogawa, Akihiro Hayashi, Kiyoharu Satou
  • Patent number: 10371275
    Abstract: Actuator for actuating a valve device comprising an electric drive (14) being operatively engaged to an actuating element (1) of the valve device, the electric drive (14) comprising at least one torque motor (2) which drives a hollow shaft (3) as an internal rotor, that positions a threaded drive (4) having a screw nut (6) and a threaded spindle (5) for converting the rotational movement of the hollow shaft (3) into a translational movement of the threaded spindle (5), and the threaded spindle (5) acts upon the actuating element (1) for displacing the same, wherein the threaded drive (4) comprises an inverted roller screw (4.1), and the screw nut (6) of the inverted roller screw (4.1) houses the threaded spindle (5) as a push rod.
    Type: Grant
    Filed: October 10, 2014
    Date of Patent: August 6, 2019
    Assignee: ONESUBSEA IP UK LIMITED
    Inventor: Norbert Lenz
  • Patent number: 10371277
    Abstract: An electric solenoid valve, methods for operating and/or actuating the solenoid valve, valve system diagnostics, and applications for use are described. The valve may be designed to actuate in a manner so as to control liquid flow into and/or through a device, such as a spray nozzle. By altering the characteristics of the electrical signal transmitted to the solenoid valve, the instantaneous pressure across the valve and duration of fluid flow through the valve can be controlled with a single actuator. Controlled cyclic durations of flow may be implemented to regulate the exact timing of flow through the valve. Alternatively, cyclic durations may occur with a pulse-width modulation technique in which the duty cycle regulates average flow rate through the valve.
    Type: Grant
    Filed: September 2, 2016
    Date of Patent: August 6, 2019
    Assignee: Capstan Ag Systems, Inc.
    Inventors: Duane Needham, Andrew J. Holtz
  • Patent number: 10352607
    Abstract: A method for controlling a vapor compression system, in particular an opening degree of an expansion valve. According to a first control strategy, the expansion valve is closed until the superheat value has increased above a lower threshold superheat value. According to a second control strategy, the expansion valve is kept open until the suction pressure has increased above a lower threshold suction pressure value. In the case of low superheat value as well as low suction pressure, the second control strategy is selected for a limited period of time.
    Type: Grant
    Filed: August 21, 2015
    Date of Patent: July 16, 2019
    Assignee: Danfoss A/S
    Inventors: Junping Cai, Hans Jørgen Jensen, Lars Jensen
  • Patent number: 10352475
    Abstract: The invention provides an electrically operated valve which can more accurately detect a position of a valve body. An electrically operated valve is provided with a valve shaft, a valve body, a rotor member which is movable together with the valve shaft in a parallel direction to a first direction, a stator member which applies a turning force to the rotor member, a permanent magnet member which turns together with the rotor member, an angle sensor which detects an angle of rotation of the permanent magnet, and a guide member which guides a relative movement of the rotor member or the valve shaft in relation to the permanent magnet member. A distance between the permanent magnet and the angle sensor is fixed when the permanent magnet member turns.
    Type: Grant
    Filed: April 5, 2018
    Date of Patent: July 16, 2019
    Assignee: FUJIKOKI CORPORATION
    Inventors: Satoshi Uehara, Bunta Narukawa
  • Patent number: 10294825
    Abstract: The invention relates to a waste-heat utilization assembly (1) of an internal combustion engine (50), comprising a circuit (2) that conducts a working medium, wherein a pump (6), a distribution valve block (7), two evaporators (10, 11), an expansion machine (3), and a condenser (4) are arranged in the circuit (2) in the flow direction of the working medium. The two evaporators (10, 11) are arranged in a parallel connection, and the parallel connection begins at the distribution valve block (7) and ends at a node point (8). A temperature sensor (21) for determining the outlet temperature of the working medium at the expansion machine (3) is arranged between the expansion machine (3) and the condenser (4).
    Type: Grant
    Filed: July 15, 2015
    Date of Patent: May 21, 2019
    Assignee: Robert Bosch GmbH
    Inventors: Frank Heber, Manfred Schmitt, Mathias Kurras
  • Patent number: 10197187
    Abstract: A fluid control valve includes a valve-side housing and an actuator-side housing. The valve-side housing includes a first facing plane portion that faces a second facing plane portion of the actuator-side housing and a first connection portion arranged at an outer side region of the first facing plane portion. The actuator-side housing includes the second facing plane portion and a second connection portion arranged at an outer side region of the second facing plane portion. The valve-side housing and the actuator-side housing are connected to each other via the first connection portion and the second connection portion such that a space is provided between the first facing plane portion and the second facing plane portion. The first facing plane portion of the valve-side housing includes a depression portion that is recessed in a direction away from the second facing plane portion of the actuator-side housing.
    Type: Grant
    Filed: October 31, 2014
    Date of Patent: February 5, 2019
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Satoru Hasegawa, Katsunori Takai, Naoki Ihana
  • Patent number: 10058879
    Abstract: Spray systems and control systems for use with spray systems are provided. A method of detecting fluid flow through a nozzle coupled in fluid communication with a solenoid valve including a solenoid coil and a poppet is provided. The method generally includes (1) dispensing fluid through the solenoid valve and the nozzle, (2) de-energizing the solenoid coil to close the solenoid valve and control a fluid flow through the nozzle, (3) determining a closing time of the solenoid valve based on a signal from a poppet measuring device, and (4) determining a fluid flow value based on a time delay between the de-energizing the solenoid coil and the closing time.
    Type: Grant
    Filed: October 29, 2015
    Date of Patent: August 28, 2018
    Assignee: Capstan Ag Systems, Inc.
    Inventor: Duane Needham
  • Patent number: 9993762
    Abstract: A relatively quiet pulse valve and a method of using the pulse valve are provided. The pulse valve includes a dampening mechanism to decrease mechanical stresses, decrease operating noise, decrease compressed air waste and increase operational life expectancy of the valve. Such dampening mechanism is arranged within an internal area of the pulse valve housing.
    Type: Grant
    Filed: May 13, 2013
    Date of Patent: June 12, 2018
    Assignee: General Electric Technology GmbH
    Inventor: Per-Erik Albert Appelo
  • Patent number: 9951722
    Abstract: A chamber for reducing operating noise of a purge control solenoid valve (PCSV) for an evaporative emission control system comprises a first housing into which operating noise of the PCSV enters. The first housing has an inner space to change a cross sectional area of an operating noise path or an operating noise transfer direction at least once. A second housing has an upper portion coupled to a lower portion of the first housing to transfer the operating noise outside. At least one end of the chamber in a length direction thereof is connected with a vapor hose which connects a canister collecting fuel evaporation gas generated from a fuel tank with the PCSV to deliver the fuel evaporation gas to an engine and through which the fuel evaporation gas flows.
    Type: Grant
    Filed: August 27, 2015
    Date of Patent: April 24, 2018
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventor: YoungMin Kim
  • Patent number: 9914414
    Abstract: A system and method are provided for estimating a fluid level in a reservoir disposed in a vehicle compartment having a compartment cover. The method includes monitoring at least one operational parameter relating to the reservoir, monitoring a state of the compartment cover using a sensing device, detecting a triggering event based on the at least one operational parameter, the state of the compartment cover, or both, and in response to the triggering event, determining an estimate for an amount of fluid in the reservoir based on data related to the triggering event, and initiating a notification to a vehicle occupant when the estimated amount of fluid in the reservoir is less than or equal to a low level threshold.
    Type: Grant
    Filed: June 28, 2016
    Date of Patent: March 13, 2018
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Daniel P. Carlesimo, Marcelo V. Lazarini
  • Patent number: 9890681
    Abstract: A heat exchange device includes a thermoactuator that controls a valve to open and close one or the other of two fluid passageways. The thermoactuator includes a temperature-sensitive portion arranged to slidably advance a rod that actuates the valve as the temperature sensed by the temperature-sensitive portion increases. A stopper is positioned to abut the rod to limit advancement of the rod to thereby limit the degree of opening of the valve.
    Type: Grant
    Filed: July 24, 2014
    Date of Patent: February 13, 2018
    Assignee: YUTAKA GIKEN CO., LTD.
    Inventors: Toru Hisanaga, Tomoyuki Uchida, Teruaki Hyodo
  • Patent number: 9759121
    Abstract: An electronic thermostat control system may include a control duty determination portion outputting PWM duty signal for controlling the coolant temperature according to a coolant temperature, a rising rate of the coolant temperature, an engine speed, a load and a vehicle speed, a driving portion applying a time condition to the PWM duty signal output by the control duty determination portion for controlling outputting interval, and a fault diagnosis portion diagnosing operations of the electronic thermostat by analyzing the signals output by the driving portion and changes of the coolant temperature.
    Type: Grant
    Filed: January 22, 2013
    Date of Patent: September 12, 2017
    Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION, INZICONTROLS CO., LTD.
    Inventors: Philgi Lee, Gyuhwan Kim, Jae Suk Park, Yong Jeong Kim
  • Patent number: 9714721
    Abstract: In an electromagnetic valve in which a valve body unit is housed in a housing, the unit has a plunger including a groove portion at its cylindrical outer peripheral face. The groove portion extends in the cylinder axis direction and moves in the cylinder axis direction by an electromagnetic force generated by an electromagnetic coil. A rod is secured to the plunger and abuts against a valve seat for opening and closing the valve when the plunger is moved to close the valve and releasing the abutment of the rod against the seat when the plunger is moved to open the valve. A cylindrical sleeve covers the outer peripheral face of the plunger and is configured integrally with the plunger. A communication passage defined by the groove portion of the plunger and the inner peripheral face of the sleeve extends in the cylinder axis direction.
    Type: Grant
    Filed: March 11, 2013
    Date of Patent: July 25, 2017
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masaki Nanahara, Kei Sato, Takeshi Ishida
  • Patent number: 9701288
    Abstract: A hydraulic brake system is configured such that a pressure of a working fluid from a high-pressure-source device is adjusted by electromagnetic pressure-increase and pressure-decrease linear valves and such that a brake device generates a braking force having a magnitude that depends on the pressure adjusted by the linear valves, wherein the following controls are selectively executable, as a control of the energizing currents supplied to the linear valves, a feedback control based on a difference between an actual braking-force index and a target braking-force index; and a feedforward control based on the target braking-force index executed by placing each valve in a valve equilibrium state, wherein, in the feedforward control, an energizing current is supplied to at least one of the two linear valves, the energizing current being larger than that according to a preset relationship between a braking-force index and an energizing current in the valve equilibrium state.
    Type: Grant
    Filed: June 20, 2013
    Date of Patent: July 11, 2017
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, ADVICS CO., LTD.
    Inventors: Takahiro Okano, Yusuke Kamiya, Kiyohito Takeuchi
  • Patent number: 9644760
    Abstract: A damping valve includes a valve seat member, a valve body, a back-pressure chamber, a pilot passage, and a pilot valve, wherein the pilot valve has a pilot valve seat member and a pilot valve body, the pilot valve seat member having an cylindrical valve container provided with a penetrating hole connecting the inside and the outside, the penetrating hole communicating with the port, and an annular pilot valve seat provided in an end of the valve container, and the pilot valve body having a large diameter portion, a small diameter portion slidably inserted into the valve container, and a concave portion provided between the large diameter portion and the small diameter portion to face the penetrating hole, and an end of the large diameter portion is seated on or unseated from the pilot valve seat to open or close the pilot passage.
    Type: Grant
    Filed: March 12, 2014
    Date of Patent: May 9, 2017
    Assignee: KYB Corporation
    Inventors: Toshihiro Mori, Ryosuke Kamakura, Shinichi Hagidaira
  • Patent number: 9599183
    Abstract: A damping valve includes a valve seat member having a port and a first valve seat surrounding the port, a main valve body seated on or unseated from the first valve seat, the main valve body having a second valve seat oppositely to the valve seat member, a subsidiary valve body seated on or unseated from the second valve seat, a valve-body intermediate chamber provided between the main valve body and the subsidiary valve body in an inner circumferential side of the second valve seat, a restrictive passage that causes the port and the valve-body intermediate chamber to communicate with each other, the restrictive passage being configured to apply resistance to a flow of fluid passing therethrough, and a subsidiary valve body biasing means configured to bias the subsidiary valve body toward the main valve body.
    Type: Grant
    Filed: March 12, 2014
    Date of Patent: March 21, 2017
    Assignee: KYB Corporation
    Inventors: Ryosuke Kamakura, Toshihiro Mori, Tomoyasu Abe
  • Patent number: 9027587
    Abstract: In a method for operating a fluid valve for controlling or regulating a fluid, having at least one movable valve component is displaceable with the aid of at least one electrical actuating signal which contains at least one first actuating signal portion which causes an oscillating valve motion of the valve component. Pressure oscillations generated in the fluid due to the oscillating valve motion are detected, and are used for regulation of the oscillating valve motion caused by the first actuating signal portion.
    Type: Grant
    Filed: May 28, 2009
    Date of Patent: May 12, 2015
    Assignee: Robert Bosch GmbH
    Inventors: Juergen Hessenauer, Ulrich Foerch, Manfred Schmitt, Steffen Schumacher, Nicole Weber, Oliver Schell, Christof Ott
  • Patent number: 8893673
    Abstract: A tubular valve for adjusting the compression ratio of a variable compression ratio engine includes a straight tube capable of longitudinal translational movement in a valve casing including a low-pressure chamber, the straight tube including a first end opening into the low-pressure chamber and a second end opening into a high-pressure chamber, the second end adapted to contact with at least one shut-off surface secured to the valve casing to seal the second end, the straight tube contacting the shut-off surface by at least one nonreturn and shut-off spring; sealing element for sealing between the external surface of the straight tube and the valve casing isolating the high-pressure chamber from the low-pressure chamber, the sealing element including a nonreturn tube inside which the straight tube is held; and an electric actuator for applying to the straight tube a force opposing that of the spring.
    Type: Grant
    Filed: December 22, 2011
    Date of Patent: November 25, 2014
    Inventor: Vianney Rabhi
  • Publication number: 20140209825
    Abstract: A method for remote control and monitoring of a valve from a remote control/monitoring station comprises the following steps: providing a valve assembly including a valve body and a movable valve member, a mechanical position sensor, a drive motor, and an analog control module controlling the drive motor in response to incoming analog control signals and producing analog output control signals corresponding to the position of the valve member; removing the mechanical position sensor; removing the analog control module; operatively connecting an optical position sensor to the valve member; operatively connecting a digital control module to the drive motor and the optical position sensor controlling the drive motor in response to incoming digital control signals and producing digital output control signals corresponding to the valve member position; and communicating the digital input and output signals between the valve controller and a remote control/monitoring station over an electronic network.
    Type: Application
    Filed: January 29, 2014
    Publication date: July 31, 2014
    Inventors: JONATHAN S. FICK, ANDREW P. SARGENT, JEFFREY N. SEWARD
  • Patent number: 8740182
    Abstract: Improving the accuracy of the flow rate of a valve in a fluidic delivery device in which a desired flow rate may be achieved by varying the duty cycle of the valve. The flow rate of fluid delivery from the valve over its lifetime is stabilized by minimizing the voltage OPENING time of the valve to account for valve and piezoelectric actuator drift. Also, the valve OPENING time of one or more fluidic parameters that impact on the flow rate delivery by the valve and differ among fluidic delivery devices is compensated to optimize the flow rate accuracy.
    Type: Grant
    Filed: February 18, 2012
    Date of Patent: June 3, 2014
    Assignee: Codman Neuro Sciences Sárl
    Inventors: Rocco Crivelli, Alec Ginggen, Toralf Bork
  • Patent number: 8701703
    Abstract: The present invention comprises a method and apparatus for controlling gas flow via a gas shut-off valve assembly. In at least one embodiment, the assembly is configured to drive its shut-off valve from an open position to a closed position, in response to detecting a valve closure condition. The assembly in one or more embodiments operates as an intelligent node in an AMR network, and it interprets a received closure command as a closure condition. Additionally, or alternatively, the assembly detects abnormal operating conditions as the closure condition. Advantageously, the assembly performs initial closure verification, based on detecting movement of the valve into the closed position, and performs subsequent closure verification, based on monitoring downstream gas pressure. In the same or other embodiments, the assembly provides enhanced stand-alone reliability and safety by incorporating one or more valve clearing/cleaning routines into its operations.
    Type: Grant
    Filed: August 9, 2010
    Date of Patent: April 22, 2014
    Assignee: Sensus USA Inc.
    Inventors: Tim Scott, Dirk Steckmann, Daniel W. Peace, Doug Vargas
  • Publication number: 20130320250
    Abstract: Improvements in an electronic valve control system is disclosed where the valve is a spring diaphragm irrigation control valve where the flow rate is controlled with pulsed signal to a control solenoid. This device functions as hydraulic amplifier where the input signal is characterized by the duty cycle ratio of the applied electrical signal, and the output is the flow rate through the irrigation valve. The pilot path of the solenoid on the valve is rapidly alternated between enabled and disable states. This is achieved by installing an electrically actuated valve at some point along pilot path. The electrical signal to this valve is rapidly pulsed. This causes the irrigation valve to be held in a partially opened state. The duty cycle of the pulse signal controls the flow rate of water through the irrigation valve.
    Type: Application
    Filed: May 29, 2012
    Publication date: December 5, 2013
    Inventors: Daniel GRAHAM, Geza KISCH, Thomas CARR
  • Patent number: 8596609
    Abstract: The invention relates to a solenoid valve with a magnet assembly and a valve cartridge having a pole core, a valve insert connected to the pole core, an armature which is guided within the valve insert in an axially movable manner between a closed position and an open position and is coupled to a closing element, and a valve body which is connected to the valve insert and has a main valve seat which is arranged between at least one first flow opening and a second flow opening. The axially movable armature, when the magnet assembly is energized, is moved by a generated magnetic force within the valve insert in the direction of the pole core counter to a spring force of a resetting spring and counter to a fluid force in order to lift the closing element out of the main valve seat; and to permit a flow of fluid between the at least one first flow opening and the second flow opening.
    Type: Grant
    Filed: July 2, 2008
    Date of Patent: December 3, 2013
    Assignee: Robert Bosch GmbH
    Inventors: Klaus Heyer, Massimiliano Ambrosi, Michael Eisenlauer, Michael Rietsche, Michael Tischer, Stephan Steingass, Michael Hilden
  • Patent number: 8544818
    Abstract: An electronic adapter and a method for controlling a bistable valve for liquid or gaseous media is provided.
    Type: Grant
    Filed: January 26, 2010
    Date of Patent: October 1, 2013
    Assignee: Diener Precision Pumps Ltd
    Inventor: Raimond Walter
  • Publication number: 20130248742
    Abstract: The disclosure relates to a digital control method for a hydraulic ON/OFF valve. The ON/OFF valve is controlled by a digital control signal. The digital control signal has a number of successive cycles. Each cycle of the number of successive cycles has a pulse lasting a variable pulse period and a pause lasting a variable pause period. The pause period (tp) of each cycle is set taking into account the time when the ON/OFF valve reaches the OFF state after the pulse of the cycle.
    Type: Application
    Filed: March 23, 2012
    Publication date: September 26, 2013
    Applicant: Robert Bosch GmbH
    Inventors: Ingo Schepers, Daniel Weiler
  • Patent number: 8540209
    Abstract: A flow modulation valve has a slidably translating hollow armature with at least one energizable coil wound around and fixably attached to the hollow armature. The energizable coil or coils are influenced by at least one permanent magnet surrounding the hollow armature and supported by an outer casing. Lorentz forces on the energizable coils which are translated to the hollow armature, increase or decrease the flow area to provide flow throttling action. The extent of hollow armature translation depends on the value of current supplied and the direction of translation depends on the direction of current flow. The compact nature of the flow modulation valve combined with the high forces afforded by the actuator design provide a flow modulation valve which is highly responsive to high-rate input control signals.
    Type: Grant
    Filed: September 15, 2011
    Date of Patent: September 24, 2013
    Assignee: University of Pittsburgh—Of the Commonwealth System of Higher Education
    Inventors: John Peter Hensel, Nathaniel Black, Jimmy Dean Thorton, Jeffrey Stuart Vipperman, David N. Lambeth, William W. Clark
  • Patent number: 8382448
    Abstract: A compressed air supply system for a utility vehicle includes a compressor that can be driven by a drive by a pneumatic clutch, and a valve having a magnetic coil for selectively supplying compressed air to a coupling inlet of the clutch. When the valve is opened or maintained open, a pick-up current flows through the magnetic coil during a first phase, and a holding current weaker than the pick-up current flows through the magnetic coil during a second phase, a driver signal generating the holding current being pulse-width-modulated in the second phase.
    Type: Grant
    Filed: November 18, 2008
    Date of Patent: February 26, 2013
    Assignee: KNORR-BREMSE Systeme fuer Nutzfahrzeuge GmbH
    Inventors: Ansgar Fries, Eduard Hilberer
  • Publication number: 20120286180
    Abstract: A digital hydraulics valve includes a plurality of digitally switchable individual valves, which are connected in parallel with respect to a load, and at least one equalizing valve for generating intermediate values between the opening cross-section stages that can be implemented by the digitally switchable individual valves. The equalizing valve is a poppet valve, which provides a partial opening cross-section smaller than the nominal opening cross-section thereof by actuation using a time switching pattern. The time switching pattern is preferably based on the principle of a pulse width modulation. The equalizing valve is further preferably a valve selected from the plurality of individual valves of the digital hydraulics valve.
    Type: Application
    Filed: November 4, 2010
    Publication date: November 15, 2012
    Inventors: Hermann Mehling, Daniel Weiler
  • Patent number: 8292262
    Abstract: An object is to provide a flow control valve that is capable of reducing or eliminating backlash generated between a male threaded portion and a female threaded portion engaged with the male threaded portion and preventing or eliminating hysteresis in the flow level. The flow control valve includes a body having a fluid inlet and a fluid outlet, a cover attachable to the body, a motor disposed in a space defined by the body and the cover, a valving element connected to a rotary shaft of the motor with a screw member, and an urging member that urges the valving element toward the motor side or toward the side opposite to the motor.
    Type: Grant
    Filed: October 26, 2005
    Date of Patent: October 23, 2012
    Assignee: Surpass Industry Co., Ltd.
    Inventors: Masahiro Hasunuma, Yoshihiro Ushigusa
  • Patent number: 8250855
    Abstract: A procedure for dosing a reducing agent into the exhaust gas of an combustion engine with a valve is presented, which shows a solenoid and a movable seal body for adjusting a percolation profile, whose value is depending on the current through the solenoid, whereby the valve is triggered by a current profile, which shows two consecutive sectors. The procedure distinguishes itself in that it is checked in the first sector whether the valve is frozen or whether a danger of freezing exists, and that an electric energy that has been fed into the solenoid with the electric current is set in the second sector depending on the result of the checking. Furthermore a controller is introduced, which is customized for controlling the process of such a procedure.
    Type: Grant
    Filed: March 28, 2008
    Date of Patent: August 28, 2012
    Assignee: Robert Bosch GmbH
    Inventor: Horst Kleinknecht
  • Patent number: 8240635
    Abstract: Improving the accuracy of the flow rate of a valve in a fluidic delivery device in which a desired flow rate may be achieved by varying the duty cycle of the valve. The flow rate of fluid delivery from the valve over its lifetime is stabilized by minimizing the voltage OPENING time of the valve to account for valve and piezoelectric actuator drift. Also, the valve OPENING time of one or more fluidic parameters that impact on the flow rate delivery by the valve and differ among fluidic delivery devices is compensated to optimize the flow rate accuracy.
    Type: Grant
    Filed: October 21, 2008
    Date of Patent: August 14, 2012
    Assignee: Codman Neuro Sciences Sárl
    Inventors: Rocco Crivelli, Alec Ginggen, Toralf Bork
  • Publication number: 20120150356
    Abstract: Improving the accuracy of the flow rate of a valve in a fiuidic delivery device in which a desired flow rate may be achieved by varying the duty cycle of the valve. The flow rate of fluid delivery from the valve over its lifetime is stabilized by minimizing the voltage OPENING time of the valve to account for valve and piezoelectric actuator drift. Also, the valve OPENING time of one or more fiuidic parameters that impact on the flow rate delivery by the valve and differ among fiuidic delivery devices is compensated to optimize the flow rate accuracy.
    Type: Application
    Filed: February 18, 2012
    Publication date: June 14, 2012
    Applicant: Codman Neuro Sciences Sárl
    Inventors: Rocco Crivelli, Alec Ginggen, Toralf Bork
  • Publication number: 20120126157
    Abstract: A piezo valve is actuated by way of at least one actuator which is formed by a piezoelectric bender transducer (12) having two piezo actuators (14, 16). An actuating method has the steps of generating an actuator control signal (out), which can be output at either one of the two piezo actuators (14, 16), depending on at least one actuating control signal (in), of detecting an electric measurement quantity at one of the piezo actuators (14, 16) which is currently not controlled (16), and of generating a vibration damping signal (fb) on the basis of the detected measurement quantity and use thereof for active vibration damping for the currently controlled piezo actuator (14).
    Type: Application
    Filed: May 12, 2010
    Publication date: May 24, 2012
    Inventors: Stefan Beck, Michael Beuschel, Martin Ebel, Karl Krammel, Carsten Sensche
  • Patent number: 8172199
    Abstract: A valve control apparatus including a stepping motor coupled to a valve and a motor control unit for controlling the stepping motor is provided. The motor control unit includes a motor control section for applying drive pulses to the pulse motor, a counting section for counting the number of drive pulses applied to the pulse motor, a voltage-drop detecting section for detecting a voltage drop of a drive power supply for the motor control section, and a writing section for writing a count from the counting section in a nonvolatile memory if the voltage-drop detecting section detects the voltage drop.
    Type: Grant
    Filed: May 8, 2007
    Date of Patent: May 8, 2012
    Assignee: Surpass Industry Co., Inc.
    Inventors: Yoshihiro Ushigusa, Atsutoshi Nakamura
  • Patent number: 8165762
    Abstract: A method of operating a valve system of a transmission comprising part of the vehicle drive train through a valve unit and said valve unit's electro-magnetic activator configuration. In a transmission's hydraulic system and is part of the vehicle drive train, its hydraulic pressure value (p_EDS) can be employed and adjusted through a valve unit configuration by applying a pulse-width-modulated current signal (i_EDS) to the electro-magnetic activator system. The pulse-width modulated current signal (i_EDS) and its amplitude (A) and/or its pulse duration (pw1) will periodically change, during the applied Dither-Modulation, by maintaining the required pressure value (p_EDS) at the same time, whereby a lengthwise movable anchor, which is attached a valve shaft of the valve system, receives hereby an imposed vibrating oscillation. According to the invention, the Dither-Modulation is activated or deactivated during pre-defined operating conditions of the vehicle drive train.
    Type: Grant
    Filed: February 11, 2009
    Date of Patent: April 24, 2012
    Assignee: ZF Friedrichshafen AG
    Inventors: Christian Popp, Thilo Schmidt, Klaus Steinhauser, Christoph Braun
  • Patent number: 8141844
    Abstract: Improving the accuracy of the flow rate of a valve in a fluidic delivery device in which a desired flow rate may be achieved by varying the duty cycle of the valve. The flow rate of fluid delivery from the valve over its lifetime is stabilized by minimizing the voltage OPENING time of the valve to account for valve and piezoelectric actuator drift. Also, the valve OPENING time of one or more fluidic parameters that impact on the flow rate delivery by the valve and differ among fluidic delivery devices is compensated to optimize the flow rate accuracy.
    Type: Grant
    Filed: October 22, 2008
    Date of Patent: March 27, 2012
    Assignee: Codman NeuroSciences Sàrl
    Inventors: Rocco Crivelli, Alec Ginggen, Toralf Bork
  • Publication number: 20110089349
    Abstract: An electronic adapter and a method for controlling a bistable valve for liquid or gaseous media is provided.
    Type: Application
    Filed: January 26, 2010
    Publication date: April 21, 2011
    Inventor: Raimond WALTER
  • Publication number: 20110024654
    Abstract: An electro-hydraulic proportional flow valve speed regulating control system includes a PWM regulating device, an electro-hydraulic proportional flow valve, a hydraulic executing element, a speed measuring module, an electro-hydraulic proportional flow valve characteristic measuring module, and a feedforward control module. The speed measuring module measures a speed of the hydraulic executing element and sends the measured result to the electro-hydraulic proportional flow valve characteristic measuring module which measures a minimum actuating current and a maximum actuating current of the electro-hydraulic proportional flow valve and a maximum speed of the hydraulic executing element and inputs these measured results to the feedforward control module.
    Type: Application
    Filed: November 17, 2008
    Publication date: February 3, 2011
    Inventor: Peike Shi
  • Publication number: 20100327198
    Abstract: The application relates to a control device comprising a control element that can be rotated on a first functional level, an electronic controller, an electric power supply, and a base for mounting the control device. Said control device is designed to control plumbing appliances comprising a water discharge point and an electronically controlled mixing valve that has a cold water connection and a hot water connection. The flow or the temperature of the water discharged from the water discharge point can be changed by rotating the control element. The control device according to the invention is characterized in that a second functional level can be assigned to the control element by means of an electronic or electric pulse. Said second functional level is mechanically identical to the first functional level. The temperature of the water discharged from the water discharge point can be changed by rotating the control element when the second functional level has been assigned.
    Type: Application
    Filed: January 28, 2009
    Publication date: December 30, 2010
    Inventors: Edo Lang, Roland Obrist
  • Patent number: 7762094
    Abstract: In a refrigeration cycle system, temperature sensors measure the temperatures Tin and Tout of a refrigerant at the entrance and exit of an evaporator. A control circuit performs PID calculation based on signals from the temperature sensors in order to control a degree of superheat corresponding to the difference between the temperatures Tin and Tout at the entrance and exit to an aimed value, and calculates an operation amount for the opening degree of an expansion valve. In a case where the operation amount exceeds the limit of realizable velocity of driving an actuator that actuates the expansion valve, the control circuit performs a limiter process for limiting the operation amount so as not to exceed the limit value. The control circuit drives the actuator by using the operation amount after subjected to the limiter process, thereby to stably control the opening degree of the expansion valve.
    Type: Grant
    Filed: March 17, 2006
    Date of Patent: July 27, 2010
    Assignee: Fujkoki Corporation
    Inventors: Izumi Iwaki, Yoshio Ogawa
  • Patent number: 7758015
    Abstract: A solenoid-operated valve controller includes a first signal line and a second signal line, which are connected respectively to ends of a first solenoid coil and a second solenoid coil. The first solenoid coil and the second solenoid coil have other ends, which are electrically connected in common to a switch. One of the first and second solenoid coils, which corresponds to signal states of a plurality of input signals that are supplied respectively to the first and second signal lines, is selected, and the switch is turned on and off to control the selected one of the first and second solenoid coils.
    Type: Grant
    Filed: December 7, 2006
    Date of Patent: July 20, 2010
    Assignee: SMC Kabushiki Kaisha
    Inventor: Fumio Morikawa
  • Patent number: 7740225
    Abstract: A fluid dispenser having a dispensing valve movable between open and closed positions for controlling the flow of the fluid from the fluid dispenser. A solenoid is operatively connected to the dispensing valve and is capable of moving the dispensing valve between the open and closed positions. The fluid dispenser further includes a power supply having a voltage and a driver circuit electrically connected to the solenoid and the power supply. The driver circuit provides an output signal to the solenoid having a time variable component, for example, a peak current duration, determined as a function of the voltage of the power supply. Thus, the driver circuit automatically adjusts to, and can be used with, power supplies of different voltages. The invention further includes a method by which the driver circuit provides the output signal as a function of the power supply voltage.
    Type: Grant
    Filed: October 31, 2000
    Date of Patent: June 22, 2010
    Assignee: Nordson Corporation
    Inventor: Peter W. Estelle
  • Patent number: 7727363
    Abstract: A microfabricated device employing a bridging membrane and methods for electrokinetic transport of a liquid phase biological or chemical material using the same are described. The bridging membrane is deployed in or adjacent to a microchannel and permits either electric current flow or the transport of gas species, while inhibiting the bulk flow of material. The use of bridging membranes in accordance with this invention is applicable to electrokinetically inducing fluid flow to confine a selected material in a region of a microchannel that is not influenced by an electric field. Other structures for inducing fluid flow in accordance with this invention include nanochannel bridging membranes and alternating current fluid pumping devices. Applications of the bridging membranes according to this invention include the separation of species from a sample material, valving of fluids in a microchannel network, mixing of different materials in a microchannel, and the pumping of fluids.
    Type: Grant
    Filed: February 2, 2005
    Date of Patent: June 1, 2010
    Assignee: UT-Battelle, LLC
    Inventors: Stephen C. Jacobson, J. Michael Ramsey
  • Publication number: 20100090144
    Abstract: A high-speed actuator to move a valve stopper to a closed position against a valve seat and an open position away from the valve seat is disclosed. The actuator includes a rod carrying first and second axially spaced solenoid armatures. The rod also has a valve stopper connector end. A first solenoid coil surrounds and is spaced from the rod to bias the first solenoid armature along with the rod and valve stopper toward the valve's open position. A second solenoid surrounds and is spaced from the rod. The second solenoid is axially spaced from the first solenoid to bias the first armature towards the valve's closed position. A linear variable differential transformer (LVDT) magnetically coupled to the second solenoid armature is included to determine the instantaneous position of the valve stopper relative to the valve's seat. The LVDT is responsive to the position of the second armature. The LVDT generates an instantaneous valve position signal in concert with the movements of the rod.
    Type: Application
    Filed: October 14, 2008
    Publication date: April 15, 2010
    Inventor: Robert O. Brandt, JR.
  • Patent number: 7669432
    Abstract: A method includes cycling an electronic evaporator pressure regulator valve fluidly coupled to a refrigeration circuit to regulate flow through the electronic evaporator pressure regulator valve and sensing a current drawn by the electronic evaporator pressure regulator valve during cycling of the electronic evaporator pressure regulator valve. The method further includes determining a valve condition of the electronic evaporator pressure regulator valve based on the sensing.
    Type: Grant
    Filed: October 18, 2007
    Date of Patent: March 2, 2010
    Assignee: Emerson Retail Services, Inc.
    Inventors: Albert W. Maier, John R. Aggers, Robert A. Kensinger, Richard P. Vogh, III, Timothy D. Campbell, Scott M. Gelber