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Pub. No.:    WO/2008/102112    International Application No.:    PCT/GB2008/000548
Publication Date: 28.08.2008 International Filing Date: 19.02.2008
B62D 5/04 (2006.01)
Applicants: TRW LIMITED [GB/GB]; Stratford Road, Sollhull B90 4AX (GB) (For All Designated States Except US).
FARRELLY, James, Owen, Patrick [GB/GB]; (GB) (For US Only).
COLES, Jeffrey, Ronald [GB/GB]; (GB) (For US Only)
Inventors: FARRELLY, James, Owen, Patrick; (GB).
COLES, Jeffrey, Ronald; (GB)
Agent: TRANTER, Andrew, D.; Barker Brettell LLP, 138 Hagley Road, Edgbaston, Birmingham B16 9PW (GB)
Priority Data:
0703215.4 20.02.2007 GB
Abstract: front page image
(EN)An electrical servo assistance unit for use in a power assisted steering system comprises a stator (10) comprising a plurality of coil windings arranged at spaced locations, a rotor (8) comprising a plurality of magnets at spaced locations around its axis, an input shaft (4) and an output shaft (6) connected by a deflection member (2) which permits relative rotation of the input and output shaft in response to application of a torsional load applied therebetween the rotor being fixed to the output shaft and sharing a common axis of rotation; a commutator (12) comprising at least two conductive portions, each of which provides an electrical connection to a different coil; and at least one brush (14a, 14b) which is adapted to contact the commutator and to selectively connect at least one contact portion and its coil to an electrical supply according to the relative angular position of the brush and commutator.
(FR)L'invention porte sur une unité électrique de servo-assistance pour système de direction assistée comprenant: un stator (10) comportant plusieurs enroulements espacés, un rotor (8) comportant plusieurs aimants espacés, un arbre d'entrée (4) et un arbre de sortie (6) reliés par un élément déflecteur (2) pour en permettre la rotation relative en réponse à l'application d'une charge de torsion appliquée entre eux, le rotor étant solidaire de, et coaxial avec, l'arbre de sortie, un commutateur (12) comportant au moins deux parties conductrices reliées chacune à un enroulement différent, et au moins un balai (14a, 14b) en contact avec le commutateur et pouvant sélectivement connecter au moins une partie en contact et son enroulement, à une alimentation électrique, en fonction de la position angulaire relative du balais et du commutateur.
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BR, BW, BY, BZ, CA, CH, 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, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, SV, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW.
African Regional Intellectual Property Organization (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MT, NL, NO, PL, PT, RO, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG).
Publication Language: English (EN)
Filing Language: English (EN)