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公开(公告)号：US20190257280A1
公开(公告)日：2019-08-22
申请号：US16342838
申请日：2017-10-19
Applicant: Walbro LLC
Inventor： Martin N. Andersson , Cyrus M. Healy
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.
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公开(公告)号：US20170314490A1
公开(公告)日：2017-11-02
申请号：US15520578
申请日：2016-09-30
Applicant: WALBRO LLC
Inventor： Martin N. Andersson , Mark S. Swanson , Takashi Abei , Cyrus M. Healy
CPC classification number: F02D41/1454 , F02D31/002 , F02D31/007 , F02D31/008 , F02D37/02 , F02D41/26 , F02D2200/101 , F02P5/045 , F02P5/1508 , Y02T10/46
Abstract: A method and apparatus controlling the fuel-to-air ratio of a fuel and air mixture supplied to an operating engine includes the steps of determining a first engine speed before enleanment of the mixture, determining a second engine speed near or at the end of a period of enleanment of the mixture, and after ending the enleanment, determining whether the engine speed recovers within a predetermined range of the first engine speed and if so determining a delta speed difference between the first and second speeds and using this delta speed difference as a factor in determining a change in the fuel-to-air ratio of the fuel mixture supplied to the engine.
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公开(公告)号：US20210254593A1
公开(公告)日：2021-08-19
申请号：US17270976
申请日：2019-09-06
Applicant: Walbro LLC
Inventor： Martin N. Andersson , Cyrus M. Healy
Abstract: In at least some implementations, a method of operating an ignition system for a combustion engine includes charging an energy storage device during at least a portion of the time when the engine is operating, permitting the level of energy stored on the charge storage device to decrease over time after the engine ceases to operate, determining the energy level on the energy storage device when the engine is restarted after having ceased operating, and setting at least one engine operational parameter as a function of the determined energy level. In at least some implementations, the at least one engine operational parameter may include one or more of: richness of a fuel and air mixture to be delivered to the engine, ignition timing, desired engine idle speed.
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公开(公告)号：US10954911B2
公开(公告)日：2021-03-23
申请号：US16342838
申请日：2017-10-19
Applicant: Walbro LLC
Inventor： Martin N. Andersson , Cyrus M. Healy
IPC: F02P3/08 , F02B63/02 , F02P5/15 , F02P11/04 , H04B1/40 , F02D41/28 , F02P11/00 , F02D41/26 , F02P3/06 , F02D41/22 , F02P3/09
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.
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公开(公告)号：US20200291881A1
公开(公告)日：2020-09-17
申请号：US16763092
申请日：2018-11-27
Applicant: Walbro LLC
Inventor： Martin N. Andersson , Cyrus M. Healy , Dale P. Kus
Abstract: In at least some implementations, a method of controlling a fuel-to-air ratio of a fuel and air mixture supplied to an engine, includes the steps of determining an engine deceleration event, determining the number of engine revolutions required for the engine speed to decrease from one speed threshold to another speed threshold, comparing the number of engine revolutions determined above against a revolution threshold, and making the fuel and air mixture richer if the number of engine revolutions determined above is greater than the revolution threshold. The method may also include determining if, before the engine stabilized at a stable engine speed (which may be an engine idle speed), the engine speed decreased below the stable engine speed as the engine decelerated to the stable engine speed from a speed above the stable engine speed, and making the fuel and air mixture leaner if the determination is affirmative.
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Patent Agency Ranking
公开(公告)号：US10473042B2
公开(公告)日：2019-11-12
申请号：US15743857
申请日：2016-07-22
Applicant: WALBRO LLC
Inventor： Takashi Abei , Martin N. Andersson , Cyrus M. Healy
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.
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公开(公告)号：US20180328333A1
公开(公告)日：2018-11-15
申请号：US16045803
申请日：2018-07-26
Applicant: Walbro LLC
Inventor： Martin N. Andersson , Cyrus M. Healy
CPC classification number: F02P3/04 , F02P1/086 , F02P3/0807 , F02P5/1502
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.
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公开(公告)号：US10066592B2
公开(公告)日：2018-09-04
申请号：US14786256
申请日：2014-05-02
Applicant: Walbro LLC
Inventor： Martin N. Andersson , Cyrus M. Healy
Abstract: In at least some implementations, 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.
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公开(公告)号：US11319902B2
公开(公告)日：2022-05-03
申请号：US16960402
申请日：2019-01-18
Applicant: Walbro LLC
Inventor： Martin N. Andersson , Dale P. Kus
Abstract: In at least some implementations, a charge forming device includes a body having a main bore, a fuel metering assembly including a diaphragm that defines at least part of a fuel chamber from which fuel is provided to the main bore and a reference chamber separate from the fuel chamber, a passage communicated with a subatmospheric pressure source and with the reference chamber, and an electrically actuated valve having an open position and a closed position, and wherein the valve at least substantially prevents communication of the pressure source with the reference chamber when the valve is in the closed position and permits communication of the pressure source with the reference chamber when the valve is in the open position to vary the rate of fuel flow from the fuel chamber.
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公开(公告)号：US11073123B2
公开(公告)日：2021-07-27
申请号：US16316756
申请日：2017-07-12
Applicant: Walbro LLC
Inventor： Martin N. Andersson , Matthew A. Braun , Cyrus M. Healy , Shunya Nakamura , Tsuyoshi Watanabe
Abstract: In at least some implementations, a method of maintaining an engine speed below a first threshold, includes: (a) determining an engine speed; (b) comparing the engine speed to a second threshold that is less than the first threshold; (c) allowing an engine ignition event to occur during a subsequent engine cycle if the engine speed is less than the second threshold; and (d) skipping at least one subsequent engine ignition event if the engine speed is greater than the second threshold. In at least some implementations, the second threshold is less than the first threshold by a maximum acceleration of the engine after one ignition event so that an ignition event when the engine speed is less than the second threshold does not cause the engine speed to increase above the first threshold.
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