Fuel injection apparatus for diesel engines

Claim 1

A fuel injection apparatus for use in a diesel engine comprising: a multi-type plunger pumping means for pressurizing a fuel to be supplied from a fuel tank into cylinders of the diesel engine; accumulator means for accumulating a quantity of pressurized fuel supplied from said multi-type plunger pumping means; control valve means for successively distributing said pressurized fuel from said accumulator means to said cylinders of said diesel engine; said control valve means including a fixed outer housing with a plurality of inlet ports and outlet ports positioned around the outer circumference thereof and a cylindrical bushing means rotatably and axially movable within said outer housing in response to operating conditions of the diesel engine, said bushing means including a plurality of inlet and outlet passageways which are adjustably aligned with said ports to permit said pressurized fuel to be supplied therethrough; said control valve further including a rotatable rotor means with a plurality of through-passageways which are intermittently connected to said passageways in said bushing means to permit said pressurized fuel to be intermittently supplied therethrough, said rotatable rotor means being operatively connected to said diesel engine to rotate therewith, and including a fuel chamber for receiving said pressurized fuel from said accumulator means through a fuel inlet port in said outer housing and through-passageways in said cylindrical bushing means and said rotatable rotor means, said fuel chamber being in constant communication with said accumulator means and being successively connected to each of said fuel outlet ports during the rotation of said rotatable rotor means, said rotatable rotor means including a fuel outlet through-passageway in communication with said fuel chamber and a triangular shaped recess on an outer surface of said rotatable rotor means; said bushing means being rotatably and axially adjustable relative to said rotatable rotor means to control injection timing and fuel quantity supplied through said control valve to said diesel engine cylinders by adjusting the exposure of said triangular shaped recess relative to one of said outlet passageway in said cylindrical bushing means; and fuel injection nozzles, each being disposed adjacent to one of said diesel engine cylinders and being in fluid communication with said control valve means for injecting said pressurized fuel distributed by said control valve means into said cylinder of said diesel engine.