F - Mech Eng,Light,Heat,Weapons – 02 – B
Patent
F - Mech Eng,Light,Heat,Weapons
02
B
F02B 3/12 (2006.01) F02B 47/02 (2006.01) F02B 3/06 (2006.01)
Patent
CA 2321284
A method of operating a diesel engine (10) which overcomes problems encountered during use of a low cetane fuel with long ignition delays is disclosed. The method provides for a staged injection of an emulsified diesel fuel into the combustion chamber (14) of the diesel engine (10). In particular, the method includes the steps of (A) injecting a pilot volume (38) of an emulsified diesel fuel into a combustion chamber (14) of the diesel engine (10), wherein the emulsified diesel fuel includes water and diesel fuel, (B) compressing the pilot volume (38) of the emulsified diesel fuel within the combustion chamber (14) during a compression stroke of the diesel engine (10), and (C) injecting a main volume (40) of the emulsified diesel fuel into the combustion chamber (14) of the diesel engine (10), whereby heat generated by compression of the pilot volume (38) of the emulsified diesel fuel causes the pilot volume (38) of the emulsified diesel fuel to combust so as to ignite the main volume (40) of the emulsified diesel fuel.
Cette invention a trait à une technique de fonctionnement de moteur diesel (10) permettant de surmonter les difficultés rencontrées dans le cas d'une utilisation de carburant à faible indice de cétane. Cette technique repose sur le principe d'une injection par étapes de carburant diesel émulsionné dans la chambre de combustion (14) du moteur diesel (10). Elle comporte, notamment les phases suivantes: (A), injection d'un volume pilote (38) de carburant diesel émulsionné dans la chambre de combustion (14) du moteur diesel (10), ce carburant émulsionné étant constitué d'eau et de diesel, (B), compression du volume pilote (38) de carburant diesel émulsionné dans la chambre de combustion (14) lors du temps de compression du moteur diesel (10) et, (C), injection du volume principal (40) de carburant diesel émulsionné dans la chambre de combustion (14) du moteur diesel (10). La chaleur produite par la compression du volume pilote (38) de carburant diesel émulsionné entraîne la combustion de celui-ci, ce qui provoque l'allumage du volume principal (40) de carburant diesel émulsionné.
Caterpillar Inc.
Smart & Biggar
Talisman Capital Talon Fund Ltd.
LandOfFree
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