F - Mech Eng,Light,Heat,Weapons – 02 – B
Patent
F - Mech Eng,Light,Heat,Weapons
02
B
F02B 3/00 (2006.01) F02B 3/10 (2006.01) F02D 41/40 (2006.01) F02M 37/04 (2006.01) F02B 3/06 (2006.01)
Patent
CA 2421164
A method and apparatus for injecting fuel into a diesel engine combustion chamber is provided wherein a pre-pilot injection (225) is injected sufficiently prior to critical mass conditions being achievable to permit vaporization and formation of a substantially homogenous mixture before a critical mass exist. Preferably, a pilot injection (215) is injected after the pre-pilot injection (225) but at or before a point wherein a critical mass based on the pre-pilot (225) quantity is attained. This will result in a reduced heat release rate which in turn will result in a slower, smoother and more controlled build-up of pressure in the combustion chamber and thereby advantageously reduce combustion noise.
L'invention concerne un procédé et un dispositif pour l'injection de carburant dans une chambre de combustion de moteur diesel. Une injection pré-pilote (225) intervient suffisamment longtemps avant l'établissement des conditions de masse critique pour permettre la vaporisation et la formation d'un mélange sensiblement homogène avant l'apparition des conditions de masse critique en question. De préférence, l'injection pilote (215) intervient après l'injection pré-pilote (225) mais à un stade ou avant un stade auquel une masse critique est établie sur la base de la quantité de pré-pilote (225). On réduit ainsi le taux de libération de chaleur, ce qui donne une montée de pression plus lente, plus douce et mieux contrôlée dans la chambre de combustion, permettant donc de réduire avantageusement le bruit de combustion.
Gui Xinqun
Zukouski Russell P.
Finlayson & Singlehurst
International Engine Intellectual Property Company Llc.
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