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1. (WO2017031598) DEPOSIT MITIGATION FOR GASEOUS FUEL INJECTORS
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Pub. No.: WO/2017/031598 International Application No.: PCT/CA2016/051013
Publication Date: 02.03.2017 International Filing Date: 26.08.2016
IPC:
F02D 41/38 (2006.01) ,F02B 77/04 (2006.01) ,F02D 19/06 (2006.01) ,F02M 21/02 (2006.01) ,F02M 43/04 (2006.01) ,F02M 61/16 (2006.01) ,F02M 65/00 (2006.01)
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02
COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
D
CONTROLLING COMBUSTION ENGINES
41
Electrical control of supply of combustible mixture or its constituents
30
Controlling fuel injection
38
of the high pressure type
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02
COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
B
INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
77
Component parts, details, or accessories, not otherwise provided for
04
Cleaning of, preventing corrosion or erosion in, or preventing unwanted deposits in, combustion engines
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02
COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
D
CONTROLLING COMBUSTION ENGINES
19
Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
06
peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02
COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
M
SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
21
Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
02
for gaseous fuels
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02
COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
M
SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
43
Fuel-injection apparatus operating simultaneously on two or more fuels or on a liquid fuel and another liquid, e.g. the other liquid being an anti-knock additive
04
Injectors peculiar thereto
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02
COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
M
SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
61
Fuel injectors not provided for in groups F02M39/-F02M57/94
16
Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02-F02M61/14132
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02
COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
M
SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
65
Testing fuel-injection apparatus, e.g. testing injection timing
Applicants:
WESTPORT POWER INC. [CA/CA]; 101-1750 West 75th Avenue Vancouver, British Columbia V6P 6G2, CA
Inventors:
SOLERI, Dominique J.; FR
OUELLETTE, Patric; CA
KARIMI SHARIF, Hamed; CA
Agent:
WESTPORT POWER INC.; 101-1750 West 75th Avenue Vancouver, British Columbia V6P 6G2, CA
Priority Data:
62/210,92127.08.2015US
Title (EN) DEPOSIT MITIGATION FOR GASEOUS FUEL INJECTORS
(FR) LIMITATION DES DÉPÔTS POUR INJECTEURS DE COMBUSTIBLES GAZEUX
Abstract:
(EN) A method for deposit mitigation in a gaseous fuel injector that introduces a gaseous fuel through a gaseous fuel orifice directly into a combustion chamber of an internal combustion engine includes at least one of a) reducing the length of the gaseous fuel orifice by substantially between 10% to 50% of a previous length of a previous gaseous fuel orifice showing deposit accumulation above a predetermined threshold; b) providing the gaseous fuel orifice with an inwardly and substantially linearly tapering profile; c) determining deposit mitigation is needed; and performing at least one of the following deposit mitigation techniques i) increasing gaseous fuel injection pressure wherein deposit accumulation is reduced during fuel injection; and ii) decreasing gaseous fuel temperature wherein a rate of deposit accumulation is reduced; and d) injecting compressed air through the gaseous fuel orifice during shutdown of the internal combustion engine; whereby torque loss in the internal combustion engine due to deposit accumulation in the gaseous fuel orifice is reduced below a predetermined value.
(FR) La présente invention concerne un procédé de limitation des dépôts dans un injecteur de combustible gazeux qui introduit un combustible gazeux dans un orifice de combustible gazeux directement dans une chambre de combustion d'un moteur à combustion interne qui comprend au moins l'une des étapes suivantes consistant à : a) réduire la longueur de l'orifice de combustible gazeux sensiblement d'une proportion située dans la plage allant de 10 % à 50 % de la longueur précédente d'un orifice de combustible gazeux précédent montrant une accumulation de dépôt au-dessus d'un seuil prédéfini ; b) doter l'orifice de combustible gazeux d'un profil conique vers l'intérieur et sensiblement linéaire ; c) déterminer qu'il est nécessaire de limiter les dépôts ; et effectuer au moins l'une des techniques de limitation des dépôts suivantes consistant à i) augmenter la pression d'injection de combustible gazeux, l'accumulation de dépôts étant réduite pendant l'injection du combustible ; et ii) diminuer la température du combustible gazeux, un taux d'accumulation de dépôts étant réduit ; et d) injecter de l'air comprimé dans l'orifice de combustible gazeux lors de l'arrêt du moteur à combustion interne ; une perte de couple dans le moteur à combustion interne due à l'accumulation de dépôts dans l'orifice de combustible gazeux étant par là-même réduite de sorte à être inférieure à une valeur prédéfinie.
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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 Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (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)