Rotary fuel injection apparatus
AssigneeCaterpillar Tractor Co.
InventorAlexander Goloff
Life of this patent
Estimating the term…
Abstract
Fuel injection apparatus often uses valves which rapidly move in a start and stop motion for the purpose of starting and stopping injection. Undesirable inertial forces result from such start-stop movement of the valves. To limit such undesirable forces, a pair of valves (72,92) are provided for continuous rotation for starting and stopping injection.
Claims24
A fuel injection apparatus (10) comprising:
- a housing (24), said housing (24) having a plunger bore (38);
- a plunger (36) reciprocally mounted in said plunger bore (38) to define a pumping cavity (100) therein;
- means (20,22) for conducting fuel to and from said plunger bore (38) and to the pumping cavity (100) defined therein;
- means (72,92) for starting and stopping injection of said fuel, said means being first and second valves (72,92), said first and second valves (72,92) being fluidly interconnected and said first and second valves (72,92) being fluidly connected to said plunger bore (38);
- and
- means (119) for continuously rotating said first and second valves (72,92) during sequential and repeated starting and stopping of said injection of said fuel.
A fuel injection apparatus (10) comprising:
- a housing (24) having a plunger bore (38);
- a plunger (36) reciprocally mounted in said plunger bore (38);
- inlet and outlet ports (56,62) in said housing (24);
- a fuel conduit (20,22,22a,22b) extending from said inlet port (56) to said plunger bore (38) and from said plunger bore (38) to said outlet port 62);
- and
- first and second means for starting and stopping fuel injection, said first and second means being first and second valves (72,92) in said fuel conduit 22 between said plunger bore (38) and said outlet port (62) and being electrically actuated for continuous rotary movement.
A fuel injection system comprising:
- a housing (24) having a plunger bore (38);
- a plunger (36) reciprocally mounted in said plunger bore (38);
- inlet and outlet ports (56,62) in said housing (24);
- a fuel conduit (20) extending from said inlet port (56) to said plunger bore (38) and from said plunger bore (38) to said outlet port (62);
- a fuel reservoir (14);
- means (16) for pumping fuel from said reservoir (14) to said inlet port (56);
- and
- means for starting and stopping injection of said fuel, said means being first and second valves (72,92) in said fuel conduit (22b) and being electrically actuated for continuous rotary movement.
In a fuel injection apparatus of the type including a housing (24) having a plunger in a plunger reciprocally mounted bore and a conduit )20,22,22a,22b) conducting fuel through the housing, to and from the bore, the improvement comprising:
- means for starting and stopping injection of said fuel, said means being a first valve (72) continuously rotating at a constant speed in a first portion (22a) of said conduit, and a second valve (92) continuously rotating at a constant speed in a second portion (22b) of said conduit.
A fuel injection apparatus (10) comprising:
- a housing (24), said housing (24) having a plunger bore (38);
- a plunger (36) reciprocally mounted in said plunger bore (38);
- means (20,22,22a,22b) for conducting fuel to and from said plunger bore (38);
- and
- means for starting and stopping injection of said fuel, said means being first and second valves (72,92) said first and second valves (72,92) being fluidly interconnected and said first and second valves (72,92) being fluidly connected to said plunger bore (38), said first valve (72) continuously rotating at a constant speed in timed relationship with said plunger (36), said second valve (92) continuously rotating at said constant speed in timed relationship to said first valve (72).
In a fuel injection apparatus (10) having a source of fuel (14,16), pressure-responsive nozzle means (44) for ejecting fuel therefrom in response to fuel pressure exceeding a predetermined level therein, and pump means (36) for communicating pressurized fuel from a pumping cavity (100) thereof to said nozzle means, the improvment comprising:
- continuously rotating first valve means (72) for controlling the pressurization of fuel in said pumping cavity (100) to start ejection of fuel through said nozzle means (44) and continuously rotating second valve means (92) for controlling the pressurization of fuel in said pumping cavity (100) to stop ejection of fuel through said nozzle means (44), said first (72) and second (92) valve means being in fluid communication.
Dependencies are inferred from the claim text.