Process and apparatus for timed port injection of fuel to...

F - Mech Eng,Light,Heat,Weapons – 02 – M

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123/40, 123/43,

F02M 51/00 (2006.01) F02B 17/00 (2006.01) F02B 1/04 (2006.01) F02B 43/00 (2006.01) F02B 75/02 (2006.01)

Patent

CA 2029843

ABSTRACT OF THE DISCLOSURE A process and apparatus for timed port injection and enriched stratified charge of fuel, preferably gaseous fuel, into an internal combustion engine. The process begins with forming a lean fuel/air mixture with a first fuel portion in an intake manifold upstream of a port injector. The lean fuel/air mixture is uniformly distributed into a combustion chamber during an intake phase of an engine cycle. A subsequent fuel portion is injected in a controlled manner during the intake phase so as to form a stratified charge near the ignitor within the cylinder. The stratified charge within the cylinder is ignited and combusted. Combustion products are then exhausted from the combustion chamber. This invention also provides an apparatus and process for injecting a gaseous fuel within a combustion chamber to form an enriched portion of a stratified charge near the ignitor.

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