Patents Assigned to WALBRO LLC
  • Patent number: 10995723
    Abstract: In at least some implementations, an ignition system for a combustion engine includes a controller, an ignition circuit, and a wire providing two-way communication between the ignition circuit and the controller. The ignition circuit may include a charge capacitor that is discharged to cause an ignition event. The ignition circuit may be an inductive discharge ignition circuit including a coil and may then also include a second wire that provides electrical power to the coil.
    Type: Grant
    Filed: June 21, 2018
    Date of Patent: May 4, 2021
    Assignee: Walbro LLC
    Inventors: Justin T. Dolane, Bradley J. Roche
  • Patent number: 10954911
    Abstract: —In at least some implementations, a control and communication system for a light-duty combustion engine includes a circuit card, an ignition circuit carried by the circuit card and configured to control an ignition timing of the engine, and a short range wireless communication circuit carried by the circuit card. The communication circuit may include a Bluetooth Low Energy antenna. The ignition circuit may include an ignition capacitor that when drained induces an ignition pulse adapted to fire a spark plug. The system may further include a microprocessor that is coupled to and controls the ignition and communication circuits, and/or a clocking circuit adapted to provide a clocking frequency associated with the timing of the ignition circuit and associated with the communication circuit via a short range wireless communication protocol. The clocking circuit may include a crystal oscillator.
    Type: Grant
    Filed: October 19, 2017
    Date of Patent: March 23, 2021
    Assignee: Walbro LLC
    Inventors: Martin N. Andersson, Cyrus M. Healy
  • Patent number: 10941745
    Abstract: In at least some implementations, an auxiliary power supply in an ignition system for a light-duty combustion engine includes a first auxiliary winding and a second auxiliary winding coupled in parallel with the first auxiliary winding such that both windings are arranged to provide power to an auxiliary load. The first auxiliary winding may include a greater number of turns than the second auxiliary winding. A ratio of the number of turns in the first auxiliary winding to the number of turns in the second auxiliary winding may be between 1.5:1 and 10:1, the first auxiliary coil and the second auxiliary coil may have between 50 and 2,000 turns, and the first auxiliary coil and the second auxiliary coil are formed from wire between 25 and 45 gauge.
    Type: Grant
    Filed: July 21, 2016
    Date of Patent: March 9, 2021
    Assignee: Walbro LLC
    Inventors: Martin N. Andersson, Cyrus M. Healy
  • Patent number: 10920723
    Abstract: In at least some implementations, a liquid and vapor separator includes a body and a cover, a fuel inlet, a fuel outlet and a vent passage. A fuel pump has an inlet in communication with the interior volume and an outlet in communication with the fuel outlet. A fuel pressure regulator has an inlet in communication with the fuel pump outlet, an outlet in communication with the interior volume and a valve between the fuel pressure regulator inlet and the fuel pressure regulator outlet. The fuel pressure regulator is carried by the cover and the cover defines at least part of a fuel passage between the fuel pump outlet and the fuel outlet. An inlet valve is received within the interior volume and associated with the fuel inlet. A wall at least partially separates the area of the fuel pump from the area of the inlet valve.
    Type: Grant
    Filed: June 15, 2017
    Date of Patent: February 16, 2021
    Assignee: Walbro LLC
    Inventors: Jeffrey D. Hanby, Kevin L. Israelson, Elton J. Fisch
  • Patent number: 10920722
    Abstract: In at least some implementations, a wire includes a core formed from an electrically conductive material and having an outer surface, and a polymeric insulator surrounding the core. The insulator has a resistivity of between 105 and 109 ohms/square, and the insulator has an inner surface engaged with the core. In at least some implementations, the core is formed from metal and has a conductivity of at least 1×10?6 ?m. The insulator may include a base material and a conductive material in the base material, wherein the conductive material has a conductivity between 105 and 106 ohms/square. The insulator may have an outer surface that defines an outer surface of the wire and/or the insulator may have an inner surface engaged with the core.
    Type: Grant
    Filed: February 20, 2019
    Date of Patent: February 16, 2021
    Assignee: Walbro LLC
    Inventor: Edward J. Talaski
  • Patent number: 10907537
    Abstract: In at least some implementations, an ignition system for a combustion engine includes analog circuit components arranged to control ignition events at an engine speed below a first threshold of engine speed and a microprocessor to control ignition events at engine speeds higher than the first threshold. Hence, ignition can be controlled at lower engine cranking speeds to facilitate starting the engine at lower engine rotational speeds.
    Type: Grant
    Filed: March 19, 2018
    Date of Patent: February 2, 2021
    Assignee: Walbro LLC
    Inventors: Martin N. Andersson, Cyrus M. Healy, Robby L. Linton
  • Patent number: 10895222
    Abstract: A charge forming device includes a body with a main bore through which air flows and a fuel inlet through which fuel enters the main bore. A diaphragm defines part of a fuel chamber that leads to a fuel passage. The valve body is received in the fuel passage and has a first end, a second end, a sidewall, a valve passage having an inlet into which fuel from the fuel chamber enters and an outlet from which fuel exits for delivery to the main bore, and a cross passage extending through the sidewall between the first end and the second end and opening into the valve passage. A valve is carried by the body and has a valve head received in the cross passage and extending into the valve passage to at least partially inhibit fuel flow through the valve passage.
    Type: Grant
    Filed: April 26, 2019
    Date of Patent: January 19, 2021
    Assignee: Walbro LLC
    Inventors: Katsushi Habu, Tomoya Kawada, Kazuya Sasahara
  • Patent number: 10890140
    Abstract: A carburetor fuel flow control device having an elongate annular body received in a cavity with an inlet in its side-wall communicating with a fuel supply passage and an outlet downstream of the inlet and adjacent to an end of the body, and a needle valve with a metering portion adjacent one end rotatably and slidably received in the body with the metering portion at least partially lapping or blocking the inlet to change the effective flow area of the inlet in response to generally axial movement of the needle valve relative to the inlet.
    Type: Grant
    Filed: February 3, 2016
    Date of Patent: January 12, 2021
    Assignee: Walbro LLC
    Inventors: Noriyu Nagata, Hidenori Sasaki, Masashi Sasaki, Daisuke Sato, Hitoshi Terakado
  • Patent number: 10883869
    Abstract: In at least some implementations, a fluid level sensor assembly includes a housing, a sensor element carried by the housing, an arm that moves relative to the sensor element, a saddle coupled to at least part of the arm to retain the position of the arm relative to the sensor element, and a retainer. The retainer is coupled to the saddle and overlies a portion of the saddle, the arm or both, to inhibit decoupling of the arm from the saddle.
    Type: Grant
    Filed: December 20, 2017
    Date of Patent: January 5, 2021
    Assignee: Walbro LLC
    Inventors: Jeffrey D. Hanby, Douglas W. Salowitz, Jr.
  • 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: 10844800
    Abstract: A kill switch assembly for an internal combustion engine may include a housing, a first terminal carried by the housing and connected to a ground wire, a second terminal carried by the housing and connected to an engine microcontroller communication wire, and a kill switch. The kill switch may be carried by the housing, electrically connected to the first and second terminals, and manually operable by an operator to change the state of the electric switch to provide an engine stop signal to the engine microcontroller. The assembly may also include an electronic circuit carried by the housing, connected to the first and second terminals, and through the wires communicating with the engine microcontroller.
    Type: Grant
    Filed: January 19, 2017
    Date of Patent: November 24, 2020
    Assignee: Walbro LLC
    Inventors: Martin N. Andersson, Cyrus M. Healy, Gerald J. LaMarr, Jr., George M. Pattullo
  • Patent number: 10738741
    Abstract: A charge forming device may have a rotatable fuel adjustment valve received in a passage of a body of the device. A limiter cap may have a driving feature engageable with a drive feature on the valve and having a first position permitting rotation of the valve relative to the limiter cap and a second position permitting only lesser rotation of the valve than that of the first portion. The limiter cap may have a tamper restraint feature that retains the lesser range of rotation.
    Type: Grant
    Filed: May 26, 2017
    Date of Patent: August 11, 2020
    Assignee: Walbro LLC
    Inventors: Yoshiaki Doyama, Teruhiko Tobinai
  • Patent number: 10704502
    Abstract: A marine outboard engine includes an internal combustion engine including at least one fuel injector; a fuel vapor separator including: a separator body, a fuel reservoir defined by the separator body, and a first fuel pump fluidly connected between the fuel reservoir and the fuel injector; a fuel tank; and a second fuel pump fluidly connected between the fuel tank and the fuel vapor separator. The fuel vapor separator includes a heat exchanger disposed in the separator body. The heat exchanger includes at least one fuel channel defined by the heat exchanger body, the at least one fuel channel including: an inlet adapted for receiving fuel from the engine, and an outlet fluidly communicating with the fuel reservoir; and at least one coolant channel defined by the heat exchanger body, the at least one fuel channel and the at least one coolant channel being in thermal communication.
    Type: Grant
    Filed: October 26, 2018
    Date of Patent: July 7, 2020
    Assignees: BRP US INC., WALBRO LLC
    Inventors: Matthew James Young, Justin Johnson, Paul Westhoff, Jr., Travis P. Baur, Kevin L. Israelson, David D. Hacker, Nathan Blank, David Scott Soderman
  • Patent number: 10677177
    Abstract: At least some implementations of a method of distinguishing between two loads being driven by an engine, includes the steps of determining engine speed at defined intervals, comparing a second engine speed against a previously determined first engine speed, determining if the second engine speed fits an expected pattern of engine speeds, and counting either the number of incidents where the second engine speed does not fit the expected pattern, or the number of incidents where the second engine speed does fit the expected pattern, or some combination of these two. A method of determining if an engine is operating at least near a lean limit of its air to fuel ratio is also disclosed.
    Type: Grant
    Filed: June 11, 2019
    Date of Patent: June 9, 2020
    Assignee: Walbro LLC
    Inventors: Takashi Abei, Martin N. Andersson, Cyrus M. Healy
  • Patent number: 10662899
    Abstract: A carburetor may have a fuel metering assembly with a metering valve and a metering diaphragm sealed to a body of the carburetor to at least partially define a metering chamber with a portion of the metering diaphragm movable relative to the body to actuate a fuel metering valve. The diaphragm may include a continuous layer, a discontinuous layer, and an intermediate layer received at least partially between the continuous and discontinuous layers and at least partially inhibiting direct contact between the continuous and discontinuous layers. The continuous and discontinuous layers may be different polymer materials and the intermediate layer may be a polymer different than that of the discontinuous layer. The intermediate layer may include voids, segments, or a wire form.
    Type: Grant
    Filed: October 19, 2016
    Date of Patent: May 26, 2020
    Assignee: Walbro LLC
    Inventor: George M. Pattullo
  • Patent number: 10626839
    Abstract: An ignition system for a light-duty combustion engine includes a charge winding, a microcontroller and a power supply sub-circuit. The sub-circuit is coupled to both the charge winding and the microcontroller and includes a first power supply switch, a power supply capacitor and a power supply zener. The sub-circuit is arranged to turn off the first power supply switch so that charging of the power supply capacitor stops when the charge on the power supply capacitor exceeds the breakdown voltage on the power supply zener. In at least some implementations, the power supply capacitor may power the microcontroller and the power supply sub-circuit may limit or reduce the amount of electrical energy taken from the induced AC voltage of the charge winding to a level that is still able to sufficiently power the microcontroller yet saves energy for use elsewhere in the system.
    Type: Grant
    Filed: July 26, 2018
    Date of Patent: April 21, 2020
    Assignee: Walbro LLC
    Inventors: Martin N. Andersson, Cyrus M. Healy
  • Patent number: 10549631
    Abstract: An in-tank fuel pump assembly may have a mounting flange with a plurality of first coupling features, a fuel pump, a carrier connected to the fuel pump, a plurality of second coupling features on at least one of the carrier and the fuel pump, and a plurality of supports each connected to one or the first and second coupling features to locate the pump relative to the mounting flange. In some embodiments, at least one coupling feature is movable.
    Type: Grant
    Filed: July 13, 2018
    Date of Patent: February 4, 2020
    Assignee: Walbro LLC
    Inventors: Jeffrey D. Hanby, Kevin L. Israelson, Douglas W. Salowitz, Jr., Roger N. Smith, David L. Speirs, Russell R. Speirs
  • Patent number: 10544745
    Abstract: A utility engine air-to-fuel ratio control method in which during an initial or early part of a period of engine continuous operation its stability of operation is determined and if sufficiently stable a test of the air-to-fuel ratio of the air-fuel mixture supplied to the engine is performed and if need be changed to a new air-to-fuel ratio supplied to the engine during the remainder of the period of engine continuous operation. If the engine operation is not sufficiently stable the test is not started or if started is aborted.
    Type: Grant
    Filed: January 18, 2017
    Date of Patent: January 28, 2020
    Assignee: Walbro LLC
    Inventors: Martin N. Andersson, Dale P. Kus
  • Patent number: 10473042
    Abstract: At least some implementations of a method of distinguishing between two loads being driven by an engine, includes the steps of determining engine speed at defined intervals, comparing a second engine speed against a previously determined first engine speed, determining if the second engine speed fits an expected pattern of engine speeds, and counting either the number of incidents where the second engine speed does not fit the expected pattern, or the number of incidents where the second engine speed does fit the expected pattern, or some combination of these two. A method of determining if an engine is operating at least near a lean limit of its air to fuel ratio is also disclosed.
    Type: Grant
    Filed: July 22, 2016
    Date of Patent: November 12, 2019
    Assignee: Walbro LLC
    Inventors: Takashi Abei, Martin N. Andersson, Cyrus M. Healy
  • Patent number: 10415508
    Abstract: In at least some implementations, a charge forming device includes a body defining at least part of a first passage, a throttle valve movable relative to the first passage between an idle position and a wide open position, an air bleed passage communicated with the first passage, and a control valve. The control valve may be arranged in the air bleed passage to selectively inhibit or prevent air flow to the first passage from the air bleed passage. And the control valve is moveable between a first position and a second position in response to movement of the throttle valve wherein greater air flow is permitted from the air bleed passage to the first passage in the body when the control valve is in the second position than when the control valve is in the first position.
    Type: Grant
    Filed: October 7, 2016
    Date of Patent: September 17, 2019
    Assignee: Walbro LLC
    Inventor: Thomas L. Schmidt