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1. (WO2019030305) A METHOD FOR OPERATING A VEHICLE TRANSMISSION
Latest bibliographic data on file with the International BureauSubmit observation

Pub. No.: WO/2019/030305 International Application No.: PCT/EP2018/071552
Publication Date: 14.02.2019 International Filing Date: 08.08.2018
IPC:
F16H 61/04 (2006.01) ,F16H 61/06 (2006.01)
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16
ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
H
GEARING
61
Control functions within change-speed- or reversing-gearings for conveying rotary motion
04
Smoothing ratio shift
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16
ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
H
GEARING
61
Control functions within change-speed- or reversing-gearings for conveying rotary motion
04
Smoothing ratio shift
06
by controlling rate of change of fluid pressure
Applicants:
PERKINS ENGINES COMPANY LTD [GB/GB]; Eastfield Peterborough PE1 5FQ, GB
Inventors:
BEYER, Michael; US
CRONIN, Michael; US
SPENCER, Steven; US
DRANEY, Erik; US
STUTZMAN, Kevin; US
Agent:
MURGITROYD & COMPANY; Scotland House 165-169 Scotland Street Glasgow Strathclyde G5 8PL, GB
Priority Data:
17185724.610.08.2017EP
Title (EN) A METHOD FOR OPERATING A VEHICLE TRANSMISSION
(FR) PROCÉDÉ DE FONCTIONNEMENT D'UNE TRANSMISSION DE VÉHICULE
Abstract:
(EN) A method of operating a transmission of a vehicle drive train is provided. The transmission comprises at least one interlocking shift element and at least one frictional shift element. The method comprises receiving a command (200) for the at least one interlocking shift element to move to an engaged position, and applying a first pressure of fluid (202) to the at least one interlocking shift element. The first pressure of fluid is less than a maximum engagement pressure. A second pressure of fluid to the at least one frictional shift element is pulsed (204). It is then determined (206) whether the interlocking shift element has moved to the engaged position. The first pressure of fluid is then increased towards the maximum engagement pressure (208) once it has been determined that the shift element is in the engaged position.
(FR) L'invention concerne un procédé de fonctionnement d'une transmission de véhicule. La transmission comprend au moins un élément de changement de rapport à verrouillage et au moins un élément de changement de rapport à friction. Le procédé comprend la réception d'une commande (200) destinée à ce que l'élément de changement de rapport à verrouillage se déplace vers une position en prise, et l'application d'une première pression de fluide (202) audit élément de changement de rapport à verrouillage. La première pression de fluide est inférieure à une pression de mise en prise maximale. Une seconde pression de fluide vers ledit élément de changement de rapport à frottement est pulsée (204). Il est ensuite déterminé (206) si l'élément de changement de rapport à verrouillage s'est déplacé vers la position en prise. La première pression de fluide est ensuite augmentée vers la pression de mise en prise maximale (208) une fois qu'il a été déterminé que l'élément de changement de rapport est dans la position en prise.
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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, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, 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)