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1. (WO2009064456) PROCESS FOR ELECTRO-HYDRAULIC CIRCUITS AND SYSTMES INVOLVING EXCAVATOR BOOM-SWING POWER MANAGEMENT
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2009/064456    International Application No.:    PCT/US2008/012778
Publication Date: 22.05.2009 International Filing Date: 13.11.2008
IPC:
F02D 29/04 (2006.01), E02F 9/22 (2006.01), F04B 49/20 (2006.01)
Applicants: CATERPILLAR INC. [US/US]; 100 N.E. Adams Street, Peoria, IL 61629-9510 (US) (For All Designated States Except US).
CATERPILLAR JAPAN LTD. [JP/JP]; 10-1 Yoga 4-chome, Setagaya-ku, Tokyo, 158-8530 (JP) (For All Designated States Except US).
PETERSON, Randy, N. [US/US]; (US) (For US Only).
BAKER, Todd, Lawrence [US/US]; (US) (For US Only).
VERKUILEN, Michael, Todd [US/US]; (US) (For US Only).
EGELJA, Aleksandar, M. [US/US]; (US) (For US Only).
YOSHINO, Tetsuya [JP/JP]; (JP) (For US Only)
Inventors: PETERSON, Randy, N.; (US).
BAKER, Todd, Lawrence; (US).
VERKUILEN, Michael, Todd; (US).
EGELJA, Aleksandar, M.; (US).
YOSHINO, Tetsuya; (JP)
Agent: TROUSDALE, Jonathan, V.; 100 N.E. Adams Street, Peoria, IL 61629-9510 (US)
Priority Data:
11/939,028 13.11.2007 US
Title (EN) PROCESS FOR ELECTRO-HYDRAULIC CIRCUITS AND SYSTMES INVOLVING EXCAVATOR BOOM-SWING POWER MANAGEMENT
(FR) PROCÉDÉ POUR CIRCUITS ET SYSTÈMES ÉLECTROHYDRAULIQUES IMPLIQUANT LA GESTION DE L'ÉNERGIE DU BRAS TOURELLE D'UNE PELLE HYDRAULIQUE
Abstract: front page image
(EN)A method of controlling an electro-hydraulic system having an engine driving a variable displacement pump, a hydraulic valve and a hydraulic actuator in order to achieve more efficient engine operation is disclosed. The pressures in the electro-hydraulic system are monitored and commands are received indicating the desired movement of the hydraulic actuator. Based on the pressure and the commands, the operation being performed by the machine is determined and the engine is set to an efficient setting for the particular segment of machine operation.
(FR)L'invention concerne un procédé de commande d'un système électrohydraulique comprenant un moteur entraînant une pompe à déplacement variable, une soupape hydraulique et un actionneur hydraulique afin d'obtenir un fonctionnement du moteur plus efficace. Les pressions dans le système électrohydraulique sont surveillées et des instructions sont reçues, indiquant le mouvement souhaité de l'actionneur hydraulique. En fonction de la pression et des instructions, le fonctionnement réalisé par la machine est déterminé et le moteur est réglé en une position efficace pour le segment particulier du fonctionnement de la machine.
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, ST, 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)