公开(公告)号：US10907537B2

公开(公告)日：2021-02-02

申请号：US16495910

申请日：2018-03-19

Applicant: Walbro LLC

Inventor： Martin N. Andersson ,  Cyrus M. Healy ,  Robby L. Linton

IPC: F02B63/02 ,  F02P1/08 ,  F02P5/155 ,  F02N3/02 ,  F02P9/00

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.

公开(公告)号：US10358996B2

公开(公告)日：2019-07-23

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

IPC: F02P5/04 ,  F02P5/15 ,  F02D31/00 ,  F02D37/02 ,  F02D41/14 ,  F02D41/26

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.

公开(公告)号：US20190048817A1

公开(公告)日：2019-02-14

申请号：US16070804

申请日：2017-01-18

Applicant: Walbro LLC

Inventor： Martin N. Andersson ,  Dale P. Kus

IPC: F02D41/06 ,  F02D41/24 ,  F02B75/02 ,  G01M15/05

CPC classification number: F02D41/064 ,  F02B75/02 ,  F02B2075/025 ,  F02B2075/027 ,  F02D41/062 ,  F02D41/068 ,  F02D41/2438 ,  F02D41/2454 ,  F02D2200/101 ,  F02D2400/02 ,  F02D2400/04 ,  G01M15/04 ,  G01M15/05

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.

公开(公告)号：US11378053B2

公开(公告)日：2022-07-05

申请号：US17270976

申请日：2019-09-06

Applicant: Walbro LLC

Inventor： Martin N. Andersson ,  Cyrus M. Healy

IPC: F02P3/06 ,  F02P5/14 ,  F02P5/15 ,  F02P3/08 ,  F02P1/08

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.

公开(公告)号：US11274618B2

公开(公告)日：2022-03-15

申请号：US16763092

申请日：2018-11-27

Applicant: Walbro LLC

Inventor： Martin N. Andersson ,  Cyrus M. Healy ,  Dale P. Kus

IPC: F02D31/00 ,  F02D37/02 ,  F02D41/08 ,  F02D41/12 ,  F02D41/14 ,  F02D41/00

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.

公开(公告)号：US20210033036A1

公开(公告)日：2021-02-04

申请号：US17074698

申请日：2020-10-20

Applicant: Walbro LLC

Inventor： Martin N. Andersson ,  Cyrus M. Healy ,  Gerald J. LaMarr, JR. ,  George M. Pattullo

IPC: F02D41/04 ,  F02D41/26 ,  F02N11/08 ,  F02P1/08 ,  F02P5/15 ,  F02P9/00 ,  H01H23/16 ,  A01D34/76

Abstract: A speed regulating circuit in communication with an ignition circuit having a primary coil coupled to an ignition member to cause an ignition event within an engine, the speed regulating circuit being arranged to selectively prevent energy from the primary coil from being discharged to the ignition member to selectively prevent an ignition event. In at least some implementations, the speed regulating circuit includes a bidirectional or bilateral triode thyristor having an anode coupled to the primary coil and an anode coupled to ground, and an input gate that may be selectively actuated to route to ground energy received at the triode thyristor from the primary coil to inhibit transfer of energy from the primary coil to the ignition member. The triode thyristor may be selectively actuated, for example, as a function of engine speed, such as an engine speed above a threshold speed.

公开(公告)号：US20190078547A1

公开(公告)日：2019-03-14

申请号：US15743104

申请日：2016-07-21

Applicant: WALBRO LLC

Inventor： Martin N. Andersson ,  Cyrus M. Healy

IPC: F02P3/04 ,  F02P1/02 ,  F02P1/08 ,  F02P5/15 ,  F02P3/08

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.

公开(公告)号：US20170306863A1

公开(公告)日：2017-10-26

申请号：US15520645

申请日：2015-11-06

Applicant: WALBRO LLC

Inventor： Martin N. Andersson ,  Mark S. Swanson

IPC: F02D31/00 ,  F02D37/02 ,  F02P5/15

CPC classification number: F02D41/1454 ,  F02D31/002 ,  F02D31/007 ,  F02D31/008 ,  F02D37/02 ,  F02D41/26 ,  F02D2200/101 ,  F02P5/045 ,  F02P5/1508 ,  Y02T10/46

Abstract: In at least some implementations, a method of controlling engine idle speed includes comparing engine speed to a speed threshold where the speed threshold may include a range of speeds, if the engine speed is outside of the speed threshold, adjusting the timing of an ignition spark up to a threshold amount of ignition timing adjustment, and if the engine speed is not within said speed threshold after adjustment up to the threshold amount of ignition timing adjustment then adjusting the air/fuel mixture provided to the engine to bring the engine speed within said speed threshold.

公开(公告)号：US11562855B2

公开(公告)日：2023-01-24

申请号：US16605024

申请日：2018-04-20

Applicant: Walbro LLC

Inventor： Martin N. Andersson ,  Cyrus M. Healy ,  Gerald J. LaMarr, Jr.

IPC: H01F38/12 ,  H01F27/245 ,  H01F27/26

Abstract: In at least some implementations, a lamination stack includes a plurality of plates coupled together, each plate including at least one leg that collectively define a leg of the stack, with the leg of the stack arranged so that a wire coil may be arranged on the leg of the stack, and wherein the leg of the stack includes a location feature arranged to facilitate location of the stack relative to an adjacent component. In at least some implementations, the location feature may be integrally formed with at least one of the plates, and may be defined by a projection extending from a free end of at least one leg of the stack.

公开(公告)号：US20190293046A1

公开(公告)日：2019-09-26

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

IPC: F02P9/00 ,  F02P5/15 ,  F02D31/00 ,  F02P1/08

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.