Injector Solenoid Drive Patents (Class 123/490)
  • Patent number: 10837394
    Abstract: A fuel injection controller includes a discharge switch that turns ON/OFF energization of a first energization path from a boost power source of a second booster circuit when a second control IC energizes a second solenoid, a first detection element that detects a value that depends on an energization state of the discharge switch, a constant current switch that turns ON/OFF energization of a second energization path from a power source voltage that outputs a lower voltage than a boost power source voltage when the second control IC energizes the second solenoid, a second element that detects a value that depends on an energization state of the constant current switch, and an energization path controller that switches energization to the second solenoid.
    Type: Grant
    Filed: February 3, 2020
    Date of Patent: November 17, 2020
    Assignee: DENSO CORPORATION
    Inventor: Kei Sanada
  • Patent number: 10808642
    Abstract: A fuel injection control device includes a valve closing detection unit (54) to detect a valve closing timing by using either of an electromotive force quantity detection mode and a timing detection mode, a selection unit (21) to select either of the electromotive force quantity detection mode and the timing detection mode for detecting the valve closing timing, and a correction unit (21) to calculate a correction coefficient for correcting a requested injection quantity so as to reduce the difference between an estimated injection quantity and the requested injection quantity, and the selection unit selects the electromotive force quantity detection mode regardless of the value of the requested injection quantity when the calculation of the correction coefficient is not completed.
    Type: Grant
    Filed: April 7, 2017
    Date of Patent: October 20, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Nobuyuki Satake, Eiji Murase, Tomohiro Nakano
  • Patent number: 10801461
    Abstract: An ignition apparatus performs energy input control in which energy is continuously inputted to an ignition coil to enable a spark discharge in a predetermined energy input period after interrupting a primary current by an ignition switch and generating a discharge of a spark plug by a secondary current. A combustion state determination circuit determines a combustion state by comparing a combustion pressure P detected by a combustion state detector. When the combustion pressure P is smaller than a second threshold Pth2, and there is room for improving the combustion state with respect to the present energy input condition, the energy input period IGW is increased or a target secondary current I2* is increased. By compensating the condition of the energy input control in accordance with the combustion state, a target combustion state can be achieved with just enough energy consumption.
    Type: Grant
    Filed: April 2, 2015
    Date of Patent: October 13, 2020
    Assignee: DENSO CORPORATION
    Inventors: Yasuomi Imanaka, Kaori Doi
  • Patent number: 10781936
    Abstract: A valve has a valve housing in which a closure element having at least one sleeve section is movable along its sleeve longitudinal axis by an actuator to open and close a fluid connection between a fluid inlet and outlet. The actuator has stationary and movable parts relative to the valve housing. At least the movable parts and the closure element are arranged entirely within an enclosed fluid space between the fluid inlet and outlet. To close the fluid connection spaced first and second seal devices of a double-sealed seat are in sealing contact with equally-spaced first and second counter-seal devices on the valve housing along first and second closed seating lines, respectively. With regard to the at least one double-seal seat, the ratio between first and second areas enclosed by first and second sealing lines in projection along the sleeve longitudinal axis, respectively, is between 6/10 and 10/6.
    Type: Grant
    Filed: April 8, 2016
    Date of Patent: September 22, 2020
    Assignee: Eugen Seitz AG
    Inventors: Marcel Ramsperger, Guenter Morawietz
  • Patent number: 10774772
    Abstract: In view of the foregoing issues, an object of the present invention is to provide a vehicle control device that reduces the constraints of heat generation and charging time of a booster circuit, and decreases favorably the fuel consumption and exhaust emission of an engine. A vehicle control device installed in a vehicle, the device includes: a battery; a high-voltage battery that has a voltage higher than a voltage of the battery; and a fuel injection device that injects fuel into an internal combustion engine, wherein the vehicle control device includes a control unit that determines whether to supply a drive current to the fuel injection device by the battery or supply a drive current to the fuel injection device by the high-voltage battery, and controls the fuel injection device.
    Type: Grant
    Filed: October 13, 2016
    Date of Patent: September 15, 2020
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Shirou Yamaoka, Ryo Kusakabe, Kiyotaka Ogura
  • Patent number: 10778210
    Abstract: A load driving device supplies power to drive a solenoid valve from a high-voltage power source via a discharge MOSFET or from a direct current power source via a constant-current MOSFET. A return current flows through a reflux MOSFET. A control circuit determines an operation state of the reflux MOSFET by detecting a drain voltage of the reflux MOSFET as a detection voltage. When the reflux MOSFET does not turn ON due to a gate-ground fault, the return current flows through a parasitic diode and the control circuit can determine such a fault based on the detection voltage.
    Type: Grant
    Filed: February 13, 2019
    Date of Patent: September 15, 2020
    Assignee: DENSO CORPORATION
    Inventors: Yuto Kamiya, Shohei Fujita
  • Patent number: 10767579
    Abstract: The invention relates to a method (100) for operating a solenoid valve (1) for metering a fuel (2) in a fuel injection system (3). The solenoid valve can be actuated against a restoring force (12) by an electromagnet (11), wherein •the time curve l(t) of the current I flowing through the electromagnet (11) and/or the time curve U(t) of the voltage U applied to the electromagnet (11) are detected during at least one opening process of the solenoid valve (1).
    Type: Grant
    Filed: August 7, 2017
    Date of Patent: September 8, 2020
    Assignee: Robert Bosch GmbH
    Inventors: Claudia Gasselsdorfer, Peter Christiner
  • Patent number: 10746126
    Abstract: A method for actuating a fuel injector having a magnetic coil drive for an internal combustion engine of a motor vehicle is disclosed. The fuel injector has a first terminal and a second terminal, where the first terminal is connectable via a switch element to ground and the second terminal is connected to ground. The method includes the following: actuating the switch element to connect the first terminal to ground, acquiring a time curve of the current strength of a current flowing through the magnetic coil drive, and applying a voltage pulse to the magnetic coil drive to initiate an opening procedure of the fuel injection. A duration of the voltage pulse is established as a function of the acquired time curve of the current strength. Furthermore, an engine controller and a computer program are described.
    Type: Grant
    Filed: November 10, 2017
    Date of Patent: August 18, 2020
    Assignee: Vitesco Technologies GmbH
    Inventor: Frank Denk
  • Patent number: 10746120
    Abstract: Various embodiments may include a method for operating a diesel-common-rail piezo-operated servo injector comprising: partially charging the piezo-actuator from a non-charged state at 0 V (method a); partially discharging the piezo-actuator from an already charged state to a remaining limited charge (method b); measuring the piezo-voltage with both methods and comparing the results; when the comparison demonstrates correspondence within a predefined threshold, using method b in ranges in which method a cannot be carried out; and when the comparison does not demonstrate correspondence within the predefined threshold, using method a without using method b.
    Type: Grant
    Filed: March 9, 2017
    Date of Patent: August 18, 2020
    Assignee: CONTINENTAL AUTOMOTIVE GMBH
    Inventors: Vincent Dian, Matthias Scheid
  • Patent number: 10742024
    Abstract: An electrical system includes an input node electrically connectable to a power supply. The system includes a plurality of voltage suppressors, with at least one of the voltage suppressors electrically connected to the input node. A voltage selection switch is electrically connected to at least one of the plurality of voltage suppressors. A controller in communication with the switch may selectively operate the switch based on a nominal operating voltage at the input node.
    Type: Grant
    Filed: April 29, 2019
    Date of Patent: August 11, 2020
    Assignee: Continental Automotive Systems, Inc.
    Inventors: Lance Ronald Strayer, Daniel William Shafer
  • Patent number: 10731595
    Abstract: A fuel injection control device includes a reference interval calculation section that calculates a reference interval between an end time of a decrease interval where the pressure decreases as a fuel injection rate increases and a start time of an increase interval where the pressure increases as the fuel injection rate decreases on a pressure waveform detected by the pressure sensor, an integration interval setting section that sets, in the reference interval, an integration interval where an influence of a disturbance on the fuel pressure decrease due to a target injection is suppressible, and a decrease amount calculation section that calculates a corresponding pressure decrease amount, which is a fuel pressure decrease amount corresponding to a maximum injection rate of fuel of the target injection, based on an integral value obtained by integrating the fuel pressure decrease amount due to the target injection in the integration interval.
    Type: Grant
    Filed: December 4, 2018
    Date of Patent: August 4, 2020
    Assignee: DENSO CORPORATION
    Inventor: Ko Komatsu
  • Patent number: 10690703
    Abstract: A semiconductor device for monitoring a reverse voltage is provided. The semiconductor device includes an intellectual property having an input node and an output node; a passive component connected between the output node and a potential; a monitoring circuit connected to the input node and the output node and powered by a driving power, the monitoring circuit monitoring a difference between an input level at the input node and an output level at the output node to detect a reverse voltage across the intellectual property. The driving power is provided by the output node.
    Type: Grant
    Filed: January 11, 2018
    Date of Patent: June 23, 2020
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jun-han Choi, Tae-hwang Kong, Kwang-ho Kim, Sang-ho Kim, Se-ki Kim, Jun-hyeok Yang, Sung-yong Lee, Yong-jin Lee
  • Patent number: 10612480
    Abstract: A fuel injection control device includes a correction unit to calculate a correction coefficient for correcting a valve closing timing detected by an electromotive force quantity detection mode by using a valve closing timing detected by a timing detection mode. An estimation unit estimates an estimated injection quantity by using a valve closing timing after corrected by using a correction coefficient when the electromotive force quantity detection mode is selected by a selection unit and a valve closing timing is detected by the electromotive force quantity detection mode.
    Type: Grant
    Filed: April 7, 2017
    Date of Patent: April 7, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Nobuyuki Satake, Eiji Murase, Tomohiro Nakano
  • Patent number: 10605190
    Abstract: An injection control unit includes a constant-current control unit executing a constant current control to control a current of a coil to be in a predetermined current range lower than a peak current by allowing or interrupting a first voltage applied to the coil after the peak current starting to open an injector is applied to the coil driving the injector, and a high-voltage applying control unit applying a second voltage higher than the first voltage to the coil in a case where a condition that the current of the coil becomes lower than the predetermined current range is met when the constant-current control unit executes the constant current control.
    Type: Grant
    Filed: August 14, 2017
    Date of Patent: March 31, 2020
    Assignee: DENSO CORPORATION
    Inventor: Toshio Nishimura
  • Patent number: 10495018
    Abstract: A method of determining a learning area of injector opening duration according to the present exemplary embodiment divides an entire control area for controlling opening duration of an injector into a learning map area which needs learning and a reference map area which uses an already prepared reference map as is without learning, and a period from a minimum injection time to a minimum linear injection time of the injector is determined as the learning map area, and a period from the minimum linear injection time to a maximum injection time is determined as the reference map area.
    Type: Grant
    Filed: December 10, 2017
    Date of Patent: December 3, 2019
    Assignee: Hyundai Autron Co., Ltd.
    Inventor: Yong-Ha Kim
  • Patent number: 10487788
    Abstract: A method for determining an opening behavior of a combustion engine fuel injector having a coil drive includes: applying to a coil of the coil drive an electrical test excitation that is weaker than an electrical standard excitation applied to the coil during normal operation of the engine, such that an opening position of the fuel injector is achieved at a point at which the coil drive is not in magnetic saturation; measuring the chronological progression of an electrical variable of the coil; determining a first point in time at which the fuel injector reaches its opening position under the influence of the electrical test excitation, based on the measured chronological progression of the electrical variable, and determining a second point in time at which the fuel injector would reach its opening position under the influence of the electrical standard excitation, based on the determined first point in time.
    Type: Grant
    Filed: November 28, 2012
    Date of Patent: November 26, 2019
    Assignee: CONTINENTAL AUTOMOTIVE GMBH
    Inventors: Christian Hauser, Michael Koch, Robert Fromm, Gerd Rösel
  • Patent number: 10443530
    Abstract: A solenoid assembly includes a solenoid having a coil, a current sensor configured to measure the coil current, and a controller. The controller estimates the coil current using a solenoid model, with output of the solenoid model being an estimated coil current, and receives the measured coil current from the current sensor. The controller also calculates an error value having an error sign by subtracting the estimated coil current from the measured coil current. Responsive to the error value exceeding a calibrated error threshold while the control voltage deviates from a nominal value, the controller diagnoses a solenoid fault condition. Responsive to diagnosing the solenoid fault condition, the controller isolates or identifies a particular solenoid fault condition from among a plurality of possible fault conditions, and records a diagnostic code indicative of the particular solenoid fault condition.
    Type: Grant
    Filed: May 22, 2018
    Date of Patent: October 15, 2019
    Assignee: GM Global Technology Operations LLC.
    Inventors: Shifang Li, Azeem Sarwar, Thomas W. Nehl
  • Patent number: 10428759
    Abstract: Provided is a fuel control device for an internal combustion engine that is able to detect the correct boost voltage regardless of the temperature condition, and stabilize the boost voltage value, and is able to inject an accurate amount of fuel from a fuel injection valve. The boost voltage value detected when current is not flowing in a boosting capacitor at least during a boosting operation is taken as a legitimate boost voltage value, and this legitimate boost voltage value is compared with a prescribed boost voltage value to control the boosting operation. Thus, it is possible to stabilize the boost voltage at a legitimate boost voltage value regardless of the temperature condition, and it is possible to inject an accurate amount of fuel from a fuel injection valve, thereby improving fuel consumption.
    Type: Grant
    Filed: November 25, 2015
    Date of Patent: October 1, 2019
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventor: Kazuki Kiuchi
  • Patent number: 10415450
    Abstract: A controller includes a switching delay circuit structured to determine an open delay time and a close delay time for a reductant injector, each based on battery voltage and reductant injector coil temperature. A dosing circuit is structured to determine an open time that the armature pin must be in the fully open position so as to cause the injector to inject a first quantity of reductant. An actuation time is determined based on each of the open time, the open delay time, and the close delay time. The actuation time relates to a time that the coil must be energized so as to cause the injector to inject the first quantity of reductant. A switching command signal is transmitted to the injector to energize the coil for the calculated actuation time so as to cause the injector to inject the first quantity of reductant into an exhaust gas stream.
    Type: Grant
    Filed: October 31, 2017
    Date of Patent: September 17, 2019
    Assignee: Cummins Emission Solutions Inc.
    Inventors: Vikram Sundararajan, Joe V. Hill
  • Patent number: 10408181
    Abstract: The invention relates to a gas metering valve (1) for a dual fuel engine (17), which has a displaceable closing body (6) which, in a position of resting against a valve seat (5), closes the gas metering valve (1) and, in a position of being lifted off from the valve seat (5), opens the gas metering valve (1). The gas metering valve (1) is actuatable in a gas operating mode, in which the gas metering valve (1) meters combustion gas via a gas channel (13) into an intake manifold (15) of the dual fuel engine (17), and in a liquid fuel operating mode, in which the gas metering valve (1) remains sealingly closed against the pressure prevalent in the intake manifold (15).
    Type: Grant
    Filed: February 9, 2016
    Date of Patent: September 10, 2019
    Assignee: Hoerbiger Kompressortechnik Holding GmbH
    Inventors: Martin Könczöl, Christoph Brandl
  • Patent number: 10408182
    Abstract: A fuel system that in at least some implementations includes a carburetor having a fluid passage, a solenoid, a valve, a driver circuit and a control circuit. The valve may be moved by the solenoid between an open position permitting fluid flow through the fluid passage and a closed position at least partially inhibiting fluid flow through the fluid passage. The driver circuit and control circuit are communicated with the solenoid to contribute to providing power to the solenoid and controlling actuation of the solenoid. The driver circuit and control circuit provide a first magnitude of power to the solenoid to initially change the solenoid from its closed position to its open position and a second magnitude of power to maintain the solenoid in its open position wherein the second magnitude of power is less than the first magnitude.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: September 10, 2019
    Assignee: Walbro LLC
    Inventors: Gerald J. LaMarr, Jr., Robby L. Linton
  • Patent number: 10330068
    Abstract: A method for determining the movement behavior of a fuel injector having a coil drive includes: (a) applying an electrical excitation to a coil of the coil drive, which prompts an opening movement of a valve needle; (b) recording the temporal progression of a first electrical measurement variable of the coil; (c) determining the time when the opening movement ends based on the recorded temporal progression of the first electrical measurement variable; (d) modifying the electrical excitation of the coil such that the valve needle performs a closing movement; (e) recording the temporal progression of a second electrical measurement variable of the coil; and (f) determining the time when the closing movement ends based on the recorded temporal progression of the second electrical measurement variable. One of the two measurement variables is the voltage present at the coil and the other is the intensity of current flowing through the coil.
    Type: Grant
    Filed: March 27, 2013
    Date of Patent: June 25, 2019
    Assignee: CONTINENTAL AUTOMOTIVE GMBH
    Inventors: Frank Denk, Gerd Roesel
  • Patent number: 10326357
    Abstract: A method includes operating a power converter in a first mode of operation, where the power converter includes multiple first switches and multiple boost diodes coupled to multiple first rails. Each first rail is also coupled to a different one of multiple boost inductors, and the power converter is coupled to multiple second rails. The power converter in the first mode converts electrical power transported between the first and second rails. The method also includes, during the first mode of operation, operating multiple second switches coupled in parallel across the boost diodes as synchronous switches. Each second switch is coupled across a different one of the boost diodes. The method further includes switching the power converter to a second mode of operation in which the first switches are deactivated and the second switches and the boost diodes operate as a full-bridge power converter.
    Type: Grant
    Filed: July 31, 2018
    Date of Patent: June 18, 2019
    Assignee: Raytheon Company
    Inventor: Saeed Alipour
  • Patent number: 10229778
    Abstract: An engine control system and method utilizes a processor and a valve controller in communication with the processor. A valve having a solenoid is in communication with the valve controller. The valve controller is configured to receive a combined selection and control signal from the processor, decode a desired electric current profile encoded in the signal, sense a control code encoded in the signal, and operate the solenoid in accordance with the decoded desired electric current profile in response to sensing the control code.
    Type: Grant
    Filed: June 8, 2016
    Date of Patent: March 12, 2019
    Assignee: Continental Automotive Systems, Inc.
    Inventor: Dirk Etzler
  • Patent number: 10210977
    Abstract: A power converter module is connected to an electrical power supply and is configured to generate a first voltage and a second voltage for controlling operation of a valve, where the valve includes a solenoid for affecting opening and closing of the valve. The first voltage is a boost voltage for accelerating opening of the valve. The second voltage is a holding voltage for maintaining the valve in an open state. A boost control module is configured to control supply of the first voltage to the solenoid of the valve in accordance with a first state of an opening boost control signal when a valve control signal directs opening of the valve, and is configured to control supply of the second voltage to the solenoid of the valve in accordance with a second state of the opening boost control signal when the valve control signal directs opening of the valve.
    Type: Grant
    Filed: June 3, 2016
    Date of Patent: February 19, 2019
    Assignee: Lam Research Corporation
    Inventors: Devon Pelkey, Dirk Rudolph
  • Patent number: 10197002
    Abstract: An engine includes a fuel injector. The fuel injector includes a valve body and an electromagnetic part that moves by energizing the valve body from a valve-closed position to a valve-open position. The fuel injector injects fuel when the valve body is moved to the valve-open position. In fuel injection, an ECU feeds a pre-charge current smaller than a current for operating the valve body, to the electromagnetic part in a pre-charge period at the beginning of a start of energization, and subsequently feeds a drive current for operating the valve body, to the electromagnetic part. Further, the ECU acquires a current change parameter as a parameter correlated with a speed of a rising change in drive current, and controls the feed of the pre-charge current to the electromagnetic part of the fuel injector, based on the acquired current change parameter.
    Type: Grant
    Filed: July 14, 2015
    Date of Patent: February 5, 2019
    Assignee: DENSO CORPORATION
    Inventor: Makoto Tanaka
  • Patent number: 10167802
    Abstract: The present disclosure relates to internal combustion engines. The teachings thereof may be embodied in methods for determining a state of an injection valve of an internal combustion engine. Some methods may include actuating the piezo actuator in a pulse-width-modulated manner; recording the T on and/or T off switching times of the pulse-width-modulated piezo output stage of the piezo actuator; and evaluating the recorded switching times to derive the state of the injection valve.
    Type: Grant
    Filed: June 17, 2015
    Date of Patent: January 1, 2019
    Assignee: CONTINENTAL AUTOMOTIVE GMBH
    Inventors: Andreas Baier, Tany Gargiso, Walter Schrod, Hans-Joerg Wiehoff
  • Patent number: 10125730
    Abstract: An ECU as a fuel injection control device includes: an injector control part that energizes a magnetic circuit of a fuel injector by a specified injection pulse to thereby open the fuel injector and that energizes the magnetic circuit by a specified energization pulse within a range in which a needle valve of the fuel injector is not driven; and a storage part that stores information relating to a behavior of a drive voltage (minus terminal voltage) of the fuel injector when the magnetic circuit is energized by the injector control part by the specified energization pulse.
    Type: Grant
    Filed: March 30, 2016
    Date of Patent: November 13, 2018
    Assignee: DENSO CORPORATION
    Inventor: Keisuke Yanoto
  • Patent number: 10074497
    Abstract: One embodiment describes an operating coil driver circuitry, which includes a control circuitry that outputs a trigger signal and a reference voltage; an operational amplifier that compares the reference voltage to a node voltage, in which the node voltage is directly related to current flowing through an operating coil of a switching device and the operational amplifier outputs a logic high signal when the node voltage is higher than the reference voltage and outputs a logic low signal when the node voltage is lower than the reference voltage; and a flip-flop that outputs a pulse-width modulated signal to instruct a switch to supply a desired current to the operating coil based at least in part on the trigger signal and the signal output by the operational amplifier.
    Type: Grant
    Filed: August 21, 2015
    Date of Patent: September 11, 2018
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Christopher H. Bock, Christopher J. Wieloch, James J. Kinsella, Stefan T. Dziekonski
  • Patent number: 10060374
    Abstract: Various methods and systems are provided for controlling and shaping the current waveform for a solenoid in a fuel injector that has variable impedance.
    Type: Grant
    Filed: April 28, 2016
    Date of Patent: August 28, 2018
    Assignee: General Electric Company
    Inventors: Ning Shen, Matthew K. Ferguson, Dominick Travaglini
  • Patent number: 9981469
    Abstract: A liquid discharge apparatus includes a liquid discharge head, a temperature detector, and a bias voltage applying unit. The liquid discharge head includes a piezoelectric element to generate pressure to discharge liquid through a nozzle. The temperature detector detects a temperature correlating to a temperature of the piezoelectric element. The bias voltage applying unit applies a bias voltage to a first electrode of the piezoelectric element opposite a second electrode to which a drive signal is applied. The bias voltage applying unit changes the bias voltage according to a detection result of the temperature detector.
    Type: Grant
    Filed: October 27, 2016
    Date of Patent: May 29, 2018
    Assignee: RICOH COMPANY, LTD.
    Inventor: Takeshi Sano
  • Patent number: 9970376
    Abstract: A fuel injection controller includes an energization time period calculation portion adapted to calculate an energization time period of a coil responsive to a target injection amount; and a rise control portion adapted to apply a boosted voltage to the coil, along with start of the energization time period, and to raise an current flowing through the coil to a predetermined threshold value. When a range where timing of the current raised to have a peak value at the threshold value appears in accordance with a range of an operating temperature of the coil is defined as a peak appearance range W1, the target injection amount is set such that timing of completion of the energization time period Ti is timing deviated from the peak appearance range W1.
    Type: Grant
    Filed: November 10, 2014
    Date of Patent: May 15, 2018
    Assignee: DENSO CORPORATION
    Inventors: Hiroaki Nagatomo, Makoto Tanaka
  • Patent number: 9970380
    Abstract: An engine control system includes a fuel injector and a sensor that is configured to provide a signal indicative of a temperature. A controller is in communication with the sensor. The controller includes a fuel injector driver in communication with the fuel injector. The fuel injector driver includes a saturated mode and a peak and hold mode. The controller is configured to command the fuel injector driver to control the fuel injector with one of the saturated mode or the peak and hold mode based upon the signal. For a high resistance injector, the peak and hold mode is used in cold weather conditions to break free an injector seal, and then the fuel injector driver reverts to the saturated mode.
    Type: Grant
    Filed: December 14, 2015
    Date of Patent: May 15, 2018
    Assignee: DELPHI TECHNOLOGIES IP LIMITED
    Inventor: Mahoro M. Fujita
  • Patent number: 9957909
    Abstract: The present disclosure relates to injection valves. The teachings thereof may be embodied in various valves, fuel injectors, and methods for controlling valves. An example method for setting operational parameters of a fuel injector may include: determining a measurement-specific maximum current value; applying a voltage pulse to the coil drive of the fuel injector; detecting a time curve of the current intensity of a current flowing through the coil drive; ending the voltage pulse when the detected current intensity reaches the maximum current value; and storing the time curve of the detected current intensity. The method may include generating a plurality of differential curves each based on two stored time curves of the detected current intensity for successive measurements; determining a peak current for driving the actuator of the fuel injector based at least in part on the plurality of differential curves; and operating the coil at the determined peak current.
    Type: Grant
    Filed: March 25, 2015
    Date of Patent: May 1, 2018
    Assignee: CONTINENTAL AUTOMOTIVE GMBH
    Inventor: Frank Denk
  • Patent number: 9951883
    Abstract: Disclosed herein are an apparatus and method of measuring a coil current of a hydraulic valve. The apparatus includes a first coil current measurement unit configured to receive a first coil current control signal from a coil current control device during an ON operating section of the hydraulic valve in operating sections of the hydraulic valve operated by receiving power of a battery, and measure a first coil current value flowing through a coil of the hydraulic valve using a first switching element to be switched ON, and a second coil current measurement unit configured to receive a second coil current control signal from the coil current control device during an OFF operating section of the hydraulic valve in the operating sections of the hydraulic valve operated by receiving power of the battery, and measure a second coil current value flowing through the coil of the hydraulic valve using a second switching element to be switched ON.
    Type: Grant
    Filed: May 21, 2015
    Date of Patent: April 24, 2018
    Assignee: MANDO CORPORATION
    Inventors: Jung-Wook Seo, Kwan-Seek Kim, Chang-Woo Lee
  • Patent number: 9938924
    Abstract: A control device for a fuel injection valve includes a drive circuit that controls open/close operation of the fuel injection valve by passing an exciting current through a solenoid of the fuel injection valve and an ECU that reduces a peak current value as a fuel pressure in a delivery pipe at timing of a start of energization of the fuel injection valve decreases. The ECU reduces the peak current value as an amount of fuel discharged from a high-pressure fuel pump to the delivery pipe reduces.
    Type: Grant
    Filed: May 23, 2014
    Date of Patent: April 10, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tomohiro Nakano, Eiji Murase, Rihito Kaneko
  • Patent number: 9926880
    Abstract: An in-vehicle engine control apparatus allowing split injection frequency or split injection of fuel while preventing a driving switch element for fuel injecting electromagnetic coils and a boosting switch element for generating a boosted high voltage from being overheated. An operation control circuit portion has reference data of measured environmental temperature vs allowable engine rotational speed with a selected value of the split injection frequency being a parameter, and determines the selected value having, as an upper limit, a split injection frequency which makes the internal temperature of the boosting switch element or a rapidly exciting switch element a predetermined allowable limit value in association with the present environmental temperature detected by an average environmental temperature detection element in a case and the present engine rotational speed detected by an engine rotation sensor.
    Type: Grant
    Filed: February 16, 2016
    Date of Patent: March 27, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Mitsunori Nishida, Osamu Nishizawa, Shozo Kanzaki
  • Patent number: 9890736
    Abstract: A injection control device for an internal combustion engine includes a fuel injection valve directly injecting a fuel into a cylinder of the internal combustion engine, and a drive current setting unit setting a drive current of the fuel injection valve according to a fuel pressure that is a pressure of the fuel supplied to the fuel injection valve, using a drive current profile specifying a relation between the fuel pressure and the drive current. When a compression stroke injection injecting the fuel in a compression stroke or an expansion stroke injection injecting the fuel in an expansion stroke is executed, the drive current setting unit sets the drive current using a predetermined profile having no hysteresis in change characteristics of the drive current with respect to the fuel pressure in a fuel pressure region of the compression stroke injection or the expansion stroke injection, as the drive current profile.
    Type: Grant
    Filed: March 26, 2015
    Date of Patent: February 13, 2018
    Assignee: DENSO CORPORATION
    Inventor: Hatsumi Takeuchi
  • Patent number: 9853543
    Abstract: An illustrative example embodiment of a method is for controlling a switch. The switch is used to charge a capacitor that provides an output voltage. The switch has an inductor on an input side between a power source and the switch. The method includes: initiating a switching cycle including turning on the switch, sensing a voltage representing current through the inductor, using a reference voltage as a basis for turning off the switch during the switching cycle when the sensed voltage exceeds the reference voltage, and setting an initial value of the reference voltage at a beginning of the switching cycle based on at least one feature of an activation of the switch during at least one previous switching cycle.
    Type: Grant
    Filed: April 27, 2016
    Date of Patent: December 26, 2017
    Assignee: DELPHI TECHNOLOGIES, INC.
    Inventors: Osman Musa, Mark W. Gose, Jerry W. Campbell
  • Patent number: 9831708
    Abstract: A charging device for a portable device, e.g., in a motor vehicle, includes a resonant circuit, controllable by a trigger device, for inductive transmission of energy to the portable device, wherein the trigger device is designed such that the curve shape of the excitation for the resonant circuit is generated based on an operating state of the charging device.
    Type: Grant
    Filed: May 2, 2013
    Date of Patent: November 28, 2017
    Assignee: CONTINENTAL AUTOMOTIVE GMBH
    Inventor: Herbert Froitzheim
  • Patent number: 9803565
    Abstract: A system for measuring quality of fuel in an engine is disclosed. The system includes a fuel quality measuring unit and a controller in communication with the fuel quality measuring unit. The fuel quality measuring unit includes a first valve, a second valve, and a quality measurement sensor disposed between the first valve and the second valve. The controller is configured to determine whether the engine is running in a steady state condition, and identify a measurement window based on a pressure of the fuel at an inlet, an Intake Manifold Pressure (IMP), and the steady state condition. The controller is configured to control an opening and a closing of the first valve, the second valve, and a fuel metering valve during the measurement window. The controller is configured to determine the quality of the fuel captured between the first valve and the second valve by the quality measurement sensor.
    Type: Grant
    Filed: May 24, 2016
    Date of Patent: October 31, 2017
    Assignee: Caterpillar Inc.
    Inventors: Xinyu Ge, James Cairns
  • Patent number: 9777667
    Abstract: A fuel injection control system for an internal combustion engine includes a plurality of first energy storage elements each for supplying a high voltage to a fuel injection solenoid valve, boosting circuits each for boosting a battery voltage and electrically charging one of the first energy storage elements, a second energy storage element for accumulating electrical energy of the battery voltage, and a switching circuit for transferring the electrical energy between the plurality of first energy storage elements via the second energy storage element. This configuration enables the fuel injection control system for an internal combustion engine to implement stabilized supply of a fuel by obtaining within a short time the high voltage needed to operate the fuel injector both accurately and reliably, and to contribute to cost reduction by, for example, alleviating capability requirements and part performance requirements of the individual boosting circuits.
    Type: Grant
    Filed: May 26, 2011
    Date of Patent: October 3, 2017
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Takao Fukuda, Hideyuki Sakamoto
  • Patent number: 9752545
    Abstract: In a fuel injection control apparatus, an injector is driven to open its valve by supplying a coil of the injector with a current during a high-level period of a power supply command signal outputted from a microcomputer. A valve-closing time of the injector is detected based on a coil current, which decreases from a fall time of the power supply command signal. By comparing the coil current with plural equally-divided comparison threshold values by comparators, times are detected when the coil current decreases to the comparison threshold values, respectively. The valve-closing time is detected based on time differences among the detected times.
    Type: Grant
    Filed: June 20, 2013
    Date of Patent: September 5, 2017
    Assignee: DENSO CORPORATION
    Inventor: Toshio Nishimura
  • Patent number: 9752527
    Abstract: A fuel injection device includes: a current control section which turns off a current which is applied by a current output section such that a timing at which fuel injection of a fuel injection section is ended becomes a timing coinciding with a timing at which fuel injection is ended in a case where a current is turned off from a predetermined current amount at which continuation of the fuel injection of the fuel injection section becomes possible, in a case where a fuel injection ending request timing of the fuel injection section is in a time domain in which a current which is applied by the current output section changes transiently.
    Type: Grant
    Filed: April 17, 2015
    Date of Patent: September 5, 2017
    Assignee: KEIHIN CORPORATION
    Inventor: Takayuki Shimatsu
  • Patent number: 9714626
    Abstract: An object of this disclosure is to provide a fuel injection device that can reliably detect an operation timing of a valve body, that is, a valve opening timing with high accuracy. The current of an electromagnetic valve reaches I2 at time t3, an FET 201 and an FET 221 are turned on, and a battery voltage VB is applied to the electromagnetic valve until time t5 is reached. The amount of displacement of the valve body reaches a target amount of control lift at time t4 between time t3 and time t5, that is, a movable core 304 comes into contact with a fixed core 301. The detection of the valve opening timing is performed during the period from time t3 to time t5.
    Type: Grant
    Filed: January 24, 2014
    Date of Patent: July 25, 2017
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Ayumu Hatanaka, Ryo Kusakabe, Motoyuki Abe, Toshihiro Aono, Teppei Hirotsu, Hideyuki Sakamoto, Takao Fukuda, Hideharu Ehara, Masahiro Toyohara, Akira Nishioka, Toshio Hori, Kiyoshi Aiki
  • Patent number: 9650980
    Abstract: A method includes applying a specified starting voltage to a valve actuator in a first specified operating mode for closing the valve, the valve having a spring with a spring force against which an actuator force of the actuator acts. In the first operating mode, a first period of time is ascertained which represents that a maximum current value has been reached. Furthermore, a second period of time is ascertained which represents that a minimum current value has been reached. In a specified second operating mode, the specified starting voltage is applied to the actuator until the end of the first period of time is reached, and a control voltage is then applied to the actuator until the end of the second period of time is reached, wherein the average value of the control voltage is lower than the average value of the starting voltage.
    Type: Grant
    Filed: October 4, 2013
    Date of Patent: May 16, 2017
    Assignee: CONTINENTAL AUTOMOTIVE GMBH
    Inventors: Michael Wirkowski, Christian Mey
  • Patent number: 9638377
    Abstract: A method for determining a value of a current, which is required for changing a switching state of a pressure control valve of a fuel delivery system, in which the current flowing through the pressure control valve is varied from a starting value up to a target value, and a time curve of the current is analyzed, the value required for changing the switching state being reached when the curve of the current has a change in slope, this change being detected via a first derivation over time of the current.
    Type: Grant
    Filed: August 6, 2012
    Date of Patent: May 2, 2017
    Assignee: ROBERT BOSCH GMBH
    Inventors: Andreas Sommerer, Sebastien Chatelain, Raphael Combe, Markus Viereck
  • Patent number: 9574515
    Abstract: A method for operating an internal combustion engine having at least one fuel injection valve for introducing fuel into a combustion chamber of the internal combustion engine, the valve being supplied with a specified current intensity in order to adjust a specified flow cross-section of a fuel fluidic connection in the combustion chamber. The maximum specified current intensity during normal operation is equal to a first current intensity and during a release operation is equal to a second, higher current intensity.
    Type: Grant
    Filed: January 23, 2014
    Date of Patent: February 21, 2017
    Assignee: MTU FRIEDRICHSHAFEN GMBH
    Inventors: Ronald Hegner, Michael Willmann, Marc Radl
  • Patent number: 9577519
    Abstract: Apparatus and methods are provided for feedback circuitry in a power converter, the feedback circuitry including a first resistor coupled to a first node between a high switch and a low switch, a first capacitor in series with the first resistor, the first capacitor coupled to a second node, a first comparator having a positive terminal connected between the first resistor and the first capacitor and a negative terminal connected to a third node, the first comparator configured to compare a voltage at the positive terminal to a voltage at the negative terminal, wherein the feedback circuitry is configured to generate a ramp waveform at the positive terminal of the first comparator, an amplitude of the ramp waveform based on a time constant of the first resistor and the first capacitor.
    Type: Grant
    Filed: February 2, 2015
    Date of Patent: February 21, 2017
    Assignee: Fairchild Semiconductor Corporation
    Inventor: Edward P. Coleman
  • Patent number: 9551309
    Abstract: A fluid injector includes a valve body, a valve needle and axially moveable in the valve body between a closing position that prevents a fluid injection and further positions that permit the fluid injection, an armature coupled to the valve needle for displacing the valve needle away from the closing position, and a solenoid assembly including at least a first and second coil and operable to magnetically actuate the armature via an electrical signal. A method for operating the fluid injector includes applying the electrical signal to the first coil to generate a magnetic field to move the armature for displacing the valve needle away from the closing position, evaluating a voltage across terminals of the first coil, and controlling the second coil with a further electrical signal to saturate a magnetic field in a portion of the valve body between the armature and solenoid assembly during evaluating the voltage.
    Type: Grant
    Filed: June 2, 2014
    Date of Patent: January 24, 2017
    Assignee: CONTINENTAL AUTOMOTIVE GMBH
    Inventors: Stefano Filippi, Mauro Grandi, Francesco Lenzi, Valerio Polidori