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1.发明申请公开(公告)号：US20180363571A1
公开(公告)日：2018-12-20
申请号：US15781865
申请日：2015-12-07
Applicant: HUSQVARNA AB
Inventor： Mikael Larsson , Henrik Eklund
Abstract: A hand-held power tool comprising an internal combustion engine (4), a working tool (6), a centrifugal clutch (8), and a control system (10) is disclosed. The engine (4) has a clutch-in speed, above which the engine (4) drives the working tool (6). The control system (10) comprises a rotation speed sensor (12), and a speed limitation controller (14), which is configured to limit an engine speed at a limitation speed below the clutch-in speed. It is active or activated during a starting procedure of the internal combustion engine (4). The control system (10) is configured to deactivate the speed limitation controller (14) upon sensing at least one acceleration at a level above the limitation speed and sensing at least one deceleration at a level above the limitation speed, such that the engine (4) is rotatable above the limitation speed to drive the working tool (6).
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2.发明授权公开(公告)号：US10914245B2
公开(公告)日：2021-02-09
申请号：US15781865
申请日：2015-12-07
Applicant: HUSQVARNA AB
Inventor： Mikael Larsson , Henrik Eklund
IPC: F02D31/00 , B25F5/00 , F02B63/02 , F02D41/04 , F02D41/06 , F02P11/00 , F02P5/15 , F02N11/00 , F02N3/02 , B23D59/00 , B27B17/10
Abstract: A hand-held power tool comprising an internal combustion engine (4), a working tool (6), a centrifugal clutch (8), and a control system (10) is disclosed. The engine (4) has a clutch-in speed, above which the engine (4) drives the working tool (6). The control system (10) comprises a rotation speed sensor (12), and a speed limitation controller (14), which is configured to limit an engine speed at a limitation speed below the clutch-in speed. It is active or activated during a starting procedure of the internal combustion engine (4). The control system (10) is configured to deactivate the speed limitation controller (14) upon sensing at least one acceleration at a level above the limitation speed and sensing at least one deceleration at a level above the limitation speed, such that the engine (4) is rotatable above the limitation speed to drive the working tool (6).
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Patent Agency Ranking
3.发明申请公开(公告)号：US20180355810A1
公开(公告)日：2018-12-13
申请号：US15781841
申请日：2015-12-07
Applicant: HUSQVARNA AB
Inventor： Mikael Larsson , Henrik Eklund
CPC classification number: F02D41/062 , B23D59/001 , B25F5/001 , B27B17/08 , B27B17/10 , F02B63/02 , F02D31/001 , F02D31/006 , F02D31/009 , F02D41/0097 , F02D41/022 , F02D41/08 , F02D41/26 , F02D2200/101 , F02N3/02 , F02N11/00 , F02P5/1506 , F02P11/00 , Y02T10/46
Abstract: Herein a hand-held power tool comprising an internal combustion engine (4) is disclosed. The hand-held power tool comprises, a working tool (6), a centrifugal clutch (8), and a control system (10). The internal combustion engine (4) has a clutch-in speed (ωC) above which the internal combustion engine (4) drives the working tool (6). A speed limitation controller (14), is configured to limit an engine speed at a limitation speed below the clutch-in speed (ωC). The control system (10) is configured to calculate an integral of the rotational speed of the internal combustion engine (4), and to deactivate the speed limitation controller (14) after the integral reaches an integration limit value, such that the internal combustion engine (4) is rotatable above the limitation speed (ωL) to drive the working tool (6) via the centrifugal clutch (8).
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公开(公告)号：US20220210968A1
公开(公告)日：2022-07-07
申请号：US17552567
申请日：2021-12-16
Applicant: HUSQVARNA AB
Inventor： Henrik Eklund , Herman Jonsson
Abstract: The present disclosure relates to an implement carrier 1 comprising an implement carrier body 3 driven by a driving arrangement 5 and configured for connecting alternatingly with at least a first 7 and a second 9 implement. The implement carrier further comprises at least one sensor module 11 adapted for scanning at least a portion of the area surrounding the implement carrier 1 and a connected implement 7, 9, such as containing ultrasound sensors and the like. A moveable sensor module arm 13 is provided, having a proximal end 15 connected to the implement carrier body 3, wherein the sensor module 11 is arranged on the sensor module arm at a distance from the proximal end 15. This allows for a flexible placing of the sensor module11 with regard to the implement carrier 1.
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公开(公告)号：US11162435B2
公开(公告)日：2021-11-02
申请号：US16616026
申请日：2018-05-30
Applicant: Husqvarna AB
Inventor： Tomas Wykman , Henrik Eklund , Mikael Larsson
Abstract: The present disclosure relates to a carburetor assembly (7) comprising a control unit (17), an air channel (8), a throttle valve (9), a choke valve (10), a pulsed fuel valve (11), and a fuel supply line (12). The control unit (17) is adapted to control the fuel valve (11) to supply fuel in accordance with a certain start setting, where the choke valve (10) can be open or closed. The carburetor assembly (7) comprises a rotation angle detector assembly (20) with a choke detector part (29) that is mounted to a choke shaft (30) that is connected to the choke valve (10) such that the choke detector part (29) is arranged to rotate together with the choke valve (10). The rotation angle detector assembly (20) further comprises a choke sensor device (23, 33) that is connected to the control unit (17) and can be affected by the choke detector part (29) such that the choke sensor device (23, 33) provides different output signals to the control unit (17) in dependence of whether the choke valve (10) is open or closed.
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6.发明授权公开(公告)号：US10436135B2
公开(公告)日：2019-10-08
申请号：US15781841
申请日：2015-12-07
Applicant: HUSQVARNA AB
Inventor： Mikael Larsson , Henrik Eklund
IPC: B27B17/10 , F02D41/06 , B23D59/00 , B27B17/08 , F02P11/00 , F02D31/00 , F02D41/02 , F02D41/08 , F02P5/15 , B25F5/00 , F02B63/02 , F02D41/00 , F02D41/26 , F02N3/02 , F02N11/00
Abstract: Herein a hand-held power tool comprising an internal combustion engine (4) is disclosed. The hand-held power tool comprises, a working tool (6), a centrifugal clutch (8), and a control system (10). The internal combustion engine (4) has a clutch-in speed (ωC) above which the internal combustion engine (4) drives the working tool (6). A speed limitation controller (14), is configured to limit an engine speed at a limitation speed below the clutch-in speed (ωC). The control system (10) is configured to calculate an integral of the rotational speed of the internal combustion engine (4), and to deactivate the speed limitation controller (14) after the integral reaches an integration limit value, such that the internal combustion engine (4) is rotatable above the limitation speed (ωL) to drive the working tool (6) via the centrifugal clutch (8).
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公开(公告)号：US20190048794A1
公开(公告)日：2019-02-14
申请号：US16070929
申请日：2016-01-28
Applicant: HUSQVARNA AB
Inventor： Mikael Larsson , Henrik Eklund , Björn Lundblad , Johan Assargård
Abstract: Herein a control system (10) for controlling an internal combustion engine of a hand-held power tool (2) is disclosed. The control system (10) comprises an electronic control logic (24), a first and a second sensor (26, 28). A first conductive path (36) comprises the first sensor (26). A second conductive path (38) comprises the second sensor (28). The first and second conductive paths are connected to an input (40) of the electronic control logic (24). The first and second conductive paths are connected to a fixed voltage potential. The first conductive path (36) has a first electrical property and the second conductive path (38) has a second electrical property. The first electrical property and the second electrical property together are different from at least one of the first electrical property and the second electrical property, such that the electronic control logic (24) is able to detect different states.
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