Diesel fuel injection nozzle

Fluid sprinkling – spraying – and diffusing – Unitary injection nozzle and pump or accumulator plunger – Accumulator plunger biased to discharge fluid

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Details

123531, 239 91, 239409, F02M 6108

Patent

active

043810772

ABSTRACT:
For the injection of premixed fuel and air into a diesel engine cylinder, a nozzle assembly has a piston reciprocably mounted in a nozzle body to define a premixing chamber therein. Fuel and air are delivered into this premixing chamber through respective ports which are simultaneously covered and uncovered by the piston. Extending through the premixing chamber, a stepped plunger has one end slidably fitted in a bore in the piston to define a pressure chamber therein for exerting a decreasing air pressure on the plunger and has the other end arranged for movement out of and back into the nozzle body for spraying the fuel-air mixture from the premixing chamber through spray holes formed therein. During the stroke of the piston to compress the fuel-air mixture trapped in the premixing chamber, the compressed mixture acts on the step of the plunger to hold same retracted in the nozzle body against the decreasing air pressure in the pressure chamber. Only upon movement of the piston into positive engagement with the plunger does its spray hole end project out of the nozzle body for spraying the compressed fuel-air mixture into the diesel engine cylinder.

REFERENCES:
patent: 894978 (1908-08-01), Peache
patent: 1411108 (1922-03-01), Kastler
patent: 1798349 (1931-03-01), Okochi

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