| 摘要 |
A charge forming device for an air breathing internal combustion engine (10) includes main and mixing air manifold (40) (63) for each cylinder (14), a fuel distribution port (62) in each mixing manifold (63) facing towards the intake valve (30) of each cylinder, with the fuel of each charge being supplied solely through the fuel distribution port and entrained, with a proportion of fuel carrier air supplied by a carrier air duct (54) in communication with the fuel distribution port into the main engine air supply flowing through the main and mixing manifolds. The fuel distribution port is large and is shaped to divert expansion waves induced in the charge upstream of the intake valve by the kinetics of the interrupted charge flow out of the mixing manifold and into a temporary holding area, and to allow compression wave flow of fuel-free air from the main manifold towards the intake valve so that fuel-free air accumulates near the intake valve between engine intake events.
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