公开(公告)号：US20210134524A1

公开(公告)日：2021-05-06

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 ,  H01F27/26 ,  H01F27/245

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：US10941745B2

公开(公告)日：2021-03-09

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 ,  F02N3/02

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：US20200340427A1

公开(公告)日：2020-10-29

申请号：US16960402

申请日：2019-01-18

Applicant: Walbro LLC

Inventor： Martin N. Andersson ,  Dale P. Kus

IPC: F02M17/04 ,  F02M7/18

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.

公开(公告)号：US10677177B2

公开(公告)日：2020-06-09

申请号：US16437142

申请日：2019-06-11

Applicant: Walbro LLC

Inventor： Takashi Abei ,  Martin N. Andersson ,  Cyrus M. Healy

IPC: F02D35/00 ,  F02D41/14 ,  F02D41/00 ,  F02P5/06

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.

公开(公告)号：US20200032699A1

公开(公告)日：2020-01-30

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

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：US10544745B2

公开(公告)日：2020-01-28

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

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：US20190293006A1

公开(公告)日：2019-09-26

申请号：US16437142

申请日：2019-06-11

Applicant: Walbro LLC

Inventor： Takashi Abei ,  Martin N. Andersson ,  Cyrus M. Healy

IPC: F02D35/00 ,  F02P5/06 ,  F02D41/14 ,  F02D41/00

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.

公开(公告)号：US20190040810A1

公开(公告)日：2019-02-07

申请号：US16072309

申请日：2017-01-19

Applicant: Walbro LLC

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

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

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.

公开(公告)号：US20190017456A1

公开(公告)日：2019-01-17

申请号：US16070546

申请日：2017-01-11

Applicant: Walbro LLC

Inventor： Martin N. Andersson ,  Dale P. Kus ,  George M. Pattullo

IPC: F02D41/14 ,  F02D41/00 ,  F02D41/26 ,  G01M15/05 ,  F02B63/02

Abstract: An operator initiated control process for an engine which tests the air-to-fuel ratio of an air-fuel mixture supplied to the engine when it is in stable operation and if need be changes the air-to-fuel ratio to improve engine performance and/or meet engine exhaust emissions requirements.