F - Mech Eng,Light,Heat,Weapons – 02 – M
Patent
F - Mech Eng,Light,Heat,Weapons
02
M
123/136
F02M 47/02 (2006.01) F02M 59/32 (2006.01)
Patent
CA 1198021
A FUEL INJECTOR Abstract of the Disclosure A fuel injector for use on an internal combustion engine which includes a housing enclosing a cylindrical barrel having a bore formed therein. The barrel cooperates with the housing to form an annular cavity therebetween. Axially movable within the bore is a plunger and a piston which are spaced apart. The housing also has a nozzle situated at one end which communicates with the bore for releasing fuel into the combustion chamber of the engine. Formed within the bore between the plunger and the piston is a timing chamber and formed between the piston and the nozzle is a metering chamber. Pressurized fluid is directed into the timing chamber, into the metering chamber and into one end of the annular cavity by passages which are arranged in the housing and in the barrel. The passage leading into the end of the annular cavity has a control valve positioned across it such that fluid pressure can be varied to that end of the annular cavity. Arranged within the annular cavity is a cylindrical sleeve valve which is spring biased to an open position. The cylindrical sleeve valve is movable in response to pressure variations in the end of the annular cavity between an open position allowing fluid flow into the timing chamber and a closed position preventing fluid flow into the timing chamber. By controlling the movement of the cylindrical sleeve valve, one can control both the timing of the discharge of fuel from the metering chamber through the nozzle and control the quantity of fuel stored in the metering chamber for subsequent discharge through the nozzle.
423419
May Charles W.
Poore Bernard B.
Borden Ladner Gervais Llp
Deere & Company
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