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1. (WO2017097329) HAND-HELD POWERTOOL, RELATED CONTROL SYSTEM AND ITS USE, AND METHOD OF CONTROLLING SAID TOOL
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2017/097329 International Application No.: PCT/EP2015/078852
Publication Date: 15.06.2017 International Filing Date: 07.12.2015
IPC:
B23D 59/00 (2006.01) ,B27B 17/08 (2006.01) ,B27B 17/10 (2006.01) ,F02P 11/00 (2006.01) ,F02D 31/00 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
23
MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
D
PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
59
Accessories specially designed for sawing machines or sawing devices
B PERFORMING OPERATIONS; TRANSPORTING
27
WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
B
SAWS; COMPONENTS OR ACCESSORIES THEREFOR
17
Chain saws; Equipment therefor
08
Drives or gearings; Devices for swivelling or tilting the chain saw
B PERFORMING OPERATIONS; TRANSPORTING
27
WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
B
SAWS; COMPONENTS OR ACCESSORIES THEREFOR
17
Chain saws; Equipment therefor
08
Drives or gearings; Devices for swivelling or tilting the chain saw
10
Transmission clutches specially designed for chain saws
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02
COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
P
IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
11
Safety means for electric spark ignition, not otherwise provided for
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02
COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
D
CONTROLLING COMBUSTION ENGINES
31
Use of non-electrical speed-sensing governors to control combustion engines, not otherwise provided for
Applicants:
HUSQVARNA AB [SE/SE]; Drottninggatan 2 561 82 Huskvarna, SE
Inventors:
LARSSON, Mikael; SE
EKLUND, Henrik; SE
Priority Data:
Title (EN) HAND-HELD POWERTOOL, RELATED CONTROL SYSTEM AND ITS USE, AND METHOD OF CONTROLLING SAID TOOL
(FR) OUTIL ÉLECTRIQUE PORTATIF, SYSTÈME DE COMMANDE ASSOCIÉ ET SON UTILISATION, ET PROCÉDÉ DE COMMANDE DUDIT OUTIL
Abstract:
(EN) 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).
(FR) L'invention concerne un outil électrique portatif qui comprend un moteur à combustion interne (4). L'outil électrique portatif comprend un outil de travail (6), un embrayage centrifuge (8) et un système de commande (10). Le moteur à combustion interne (4) a une vitesse de prise d'embrayage (ωC) au-dessus de laquelle le moteur à combustion interne (4) entraîne l'outil de travail (6). Un dispositif de commande de limitation de vitesse (14) est configuré pour limiter une vitesse de moteur à une vitesse de limitation inférieure à la vitesse de prise d'embrayage (ωC) Le système de commande (10) est configuré pour calculer une intégrale de la vitesse de rotation du moteur à combustion interne (4), et pour désactiver le dispositif de commande de limitation de vitesse (14) après que l'intégrale a atteint une valeur limite d'intégration, de telle sorte que le moteur à combustion interne (4) peut tourner au-dessus de la vitesse de limitation (ωL) pour entraîner l'outil de travail (6) par l'intermédiaire de l'embrayage centrifuge (8).
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
CN108367369EP3386668US20180355810