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A fuel injection device and method includes a main injection valve that injects a high-pressure fuel supplied to a delivery pipe into each combustion chamber of an engine, and an auxiliary fuel injection valve supplied with the high-pressure fuel from the delivery pipe. The auxiliary fuel injection

A fuel injection device and method includes a main injection valve that injects a high-pressure fuel supplied to a delivery pipe into each combustion chamber of an engine, and an auxiliary fuel injection valve supplied with the high-pressure fuel from the delivery pipe. The auxiliary fuel injection valve is capable of injecting the high-pressure fuel in sucked air flowing in a surge tank when the engine is started under cold conditions. In addition, a fuel pressure can rapidly be increased in a starting phase since vapor in the delivery pipe can be discharged by temporarily opening the auxiliary fuel injection valve.

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A fuel injection device and method includes a main injection valve that injects a high-pressure fuel supplied to a delivery pipe into each combustion chamber of an engine, and an auxiliary fuel injection valve supplied with the high-pressure fuel from the delivery pipe. The auxiliary fuel injection

A fuel injection device and method includes a main injection valve that injects a high-pressure fuel supplied to a delivery pipe into each combustion chamber of an engine, and an auxiliary fuel injection valve supplied with the high-pressure fuel from the delivery pipe. The auxiliary fuel injection valve is capable of injecting the high-pressure fuel in sucked air flowing in a surge tank when the engine is started under cold conditions. In addition, a fuel pressure can rapidly be increased in a starting phase since vapor in the delivery pipe can be discharged by temporarily opening the auxiliary fuel injection valve. into the working portion thereof, a first outlet piston mounted in each first cylinder constructed and arranged to be moved in sealing relation to the associated cylinder from an outlet end position wherein the outlet port thereof is communicated with the working portion thereof in an axial direction away from said outlet end position into an outlet port cut-off position wherein said outlet piston cuts off the communication of the outlet port thereof with the working portion thereof and beyond into the working portion thereof, a second outlet piston mounted in each second cylinder constructed and arranged to be moved in sealing relation to the associated second cylinder from an outlet end position wherein the outlet port thereof is communicated with the working portion thereof in an axial direction away from said outlet end position into an outlet port cut-off position wherein said outlet piston cuts off the communication of the outlet port thereof with the working portion thereof and beyond into the working portion thereof, rotor structure within said housing assembly constructed and arranged to move with a rotational movement about said longitudinal axis, a first annular inlet cam disposed annularly about said longitudinal axis axially outwardly of the inlet end portions of said first cylinders, a first inlet cam follower operatively connected between said first annular inlet cam and each of said first inlet pistons so as to effect axial movements thereof in opposite directions during the rotation of the rotor structure about said longitudinal axis, a second annular inlet cam disposed annularly about said longitudinal axis axially outwardly of the inlet end portions of said second axis cylinders, a second inlet cam follower operatively connected between said second annular inlet cam and each of said second inlet pistons so as to effect axial movements thereof in opposite directions during the rotation of the rotor structure about said longitudinal axis, a first annular outlet cam disposed annularly about said longitudinal axis axially outwardly of the outlet end portions of said first cylinders, a first outlet cam follower operatively connected between said first annular outlet cam and each of said first outlet pistons so as to effect axial movements thereof in opposite directions during the rotation of the rotor structure about said longitudinal axis, a second annular outlet cam disposed annularly about said longitudinally axis axially outwardly of the outlet end portions of said second cylinders, a second outlet cam follower operatively connected between said first annular outlet cam and each of said first outlet pistons so as to effect axial movements thereof in opposite directions during the rotation of the rotor structure about said longitudinal axis, said first and second inlet and outlet annular cams being configured to move the first and second inlet and outlet pistons respectively within each cylinder through a successive five cycle repeating movement which includes (1) a power cycle wherein said first and second inlet and outlet pistons are moved axially outwardly from combustion positions disposed in closely spaced relation within the working portion of the associated cylinders defining a minimum volume condition into a respective cut-off positions thereof defining a maximum volume condition, (2) an exhaust cycle wherein said first and second outlet pistons are moved from the outlet cut-off positions thereof into the outlet end positions thereof and said first and second inlet pistons are moved through the working portions thereof into close proximity to said first and second outlet pistons respectively, (3) a transfer cycle wherein said first and second inlet and outlet pistons are moved together in close proximity to each other through the working portion thereof, (4) an intake cycle wherein said first and second outlet pistons are initially moved through the working portions of the associated cylind ers while the first and second inlet pistons respectively are in positions allowing communication of the first and second inlet ports respectively with the associated working portions with the final movement of said intake cycle resulting in said first and second inlet and outlet pistons being in compression positions spaced from the respective end positions thereof so that the communication of the respective ports are cut off from the working portion of the associated cylinder, and (5) a compression cycle wherein said first and second inlet and outlet pistons are moved from said compression positions thereof toward each other respectively into said combustion positions, the first inlet and outlet annular cams being interrelated to the second inlet and outlet annular cams such that the transfer cycle movement of each first inlet and outlet piston and an associated first inlet and outlet cam follower is accompanied by a generally equal and axially opposite transfer cycle movement of a second inlet and outlet piston and an associated second inlet and outlet cam follower so that all transfer movements of said first and second inlet and outlet pistons and the associated first and second inlet and outlet cam followers thereof are substantially axially dynamically balanced. 2. A five cycle internal combustion engine as defined in claim 1 wherein the first and second inlet and outlet cams are configured to move the associated first and second inlet and outlet pistons through two repetitive five cycle movements during each rotation of said rotor structure about the longitudinal axis of said housing assembly so that the transfer cycle movements and other cycle movements of any two diametrically opposed first or second inlet and outlet pistons take place simultaneously so as to effect axial balance and balance of the moments between adjacent cylinders about the longitudinal axis of said housing assembly. 3. A five cycle internal combustion engine as defined in claim 2 wherein there are at least two first cylinders having axes spaced equally annularly about the longitudinal axis of said housing assembly and at least two second cylinders having axes spaced equally annularly about the longitudinal axis of the housing assembly between the axes of said first cylinders. 4. A five cycle internal combustion engine as defined in claim 3 wherein the number of first cylinders is four and the number of second cylinders is four, the four first cylinders and four second cylinders having their areas disposed within inner and outer circles respectively about said longitudinal axis. 5. A five cycle internal combustion engine as defined in claim 4 wherein said first and second cylinders are generally in axially coextensive relation with respect to one another. 6. A five cycle internal combustion engine as defined in claim 5 wherein said first and second cylinders are fixed with respect to said housing assembly and said rotor assembly includes an output shaft rotatable about the longitudinal axis of said housing assembly, said first and second inlet and outlet cams being operatively fixed to said output shaft for rotation therewith. 7. A five cycle internal combustion engine as defined in claim 6 wherein each of said cam followers comprises a pair of axially spaced rollers rotatably carried by one end of an elongated piston rod fixed at an opposite end thereof to an associated piston. 8. A five cycle internal combustion engine as defined in claim 7, wherein each cam follower is guided for longitudinal rectilinear movement by a guide block fixed to the associated piston rod and slidably mounted on a pair of parallel guide rods fixed to the housing assembly. 9. A five cycle internal combustion engine as defined in claim 8 wherein in the compression positions of said first and second inlet and outlet pistons, the first and second inlet pistons are in the inlet cut-off positions thereof and said first and second outlet pistons are within the working portio