Abstract: A domestic or industrial fuel spray combustion device which includes a cylinder-shaped swirl chamber into which air streams are introduced; a fuel injection atomizer for spraying fuel to the swirl chamber; an ignition plug; a first combustion cylinder connected through a choke to the swirl chamber, the first combustion cylinder being coaxial with the swirl chamber; and being larger than an equal to the swirl chamber in diameter and a second combustion cylinder connected through a choke to the first combustion cylinder, the second combustion cylinder being coaxial with the first combustion chamber and being equal to or smaller than the first combustion cylinder in diameter. This structure provides a compact combustion device which enables stable combustion even with a small amount of fuel.

Abstract: An internal combustion engine according to the present invention includes a piston reciprocally movable within a cylinder for affording rotational motions to a crankshaft, a combustion chamber formed among the piston, the cylinder and a cylinder head, an intake valve mechanism for opening and closing an intake passage to be communicated with the combustion chamber, igniting means having its igniting portion facing the combustion chamber, fuel supply means for supplying a predetermined quantity of fuel toward a predetermined wall of the combustion chamber, which is heated to a predetermined high temperature by the combustion in the combustion chamber, and an exhaust valve mechanism for opening and closing an exhaust passage to be communicated with the combustion chamber.

Abstract: A direct injection type internal combustion engine with a low pressure fuel injector includes a cylinder block having a predetermined number of cylinders, a cylinder head mounted on the cylinder block, a piston which has a large surface area at its head wall and a high heat transfer ability and is reciprocally movable within the cylinder for affording rotational motion to a crankshaft, a combustion chamber formed among the piston, the cylinder and the cylinder head, an intake valve mechanism for opening and closing an intake passage to be communicated with the combustion chamber, igniting means having its igniting portion facing the combustion chamber, a low pressure fuel injector as fuel supply means having an injection port of a wide injection angle and directed toward the head wall of the piston, and an exhaust valve mechanism for opening and closing an exhaust passage to be communicated with the combustion chamber.

Abstract: A swirl injection valve includes: a nozzle body including a hollow cylindrical body having a hole and a bottom portion on which a nozzle port and a valve seat are formed; a needle valve member, slidably inserted and reciprocally moved within the hole of the nozzle body, having a tip portion for seating on the valve seat and controlling the opening and closing of the nozzle port; a swirl chamber formed upstream of the nozzle port and defined between an inner wall of the nozzle body and an outer wall of the needle valve member; a fuel supply passage formed within the nozzle body and connected to a fuel supply source; and inclined passage comprising at least one short passage connected to the swirl chamber and the fuel supply passage and tangentially opened to the swirl chamber at a predetermined inclined angle. The fuel is tangentially supplied from the inclined passage to the swirl chamber without pressure loss.

Abstract: A spill type swirl injector includes a nozzle body, an injection port, a pressurized fluid induction passage, a valve assembly, a swirl chamber, two tangential pressurized fluid supply passages and a spill assembly including two spill openings provided on an outer cylindrical wall of a movable member of the valve assembly and opened to inner side of the swirl chamber. An axial hole provided in the movable member of the valve assembly and in the nozzle body and discharge passage assembly is connected to a pressurized fluid supply source, thereby spilling a predetermined quantity of the pressurized fluid from the inner side of the swirl chamber through the spill opening, axial hole and spill passage assembly.

Abstract: An intermittent injection type fuel injection valve including a nozzle body comprising a hollow cylindrical member and having a valve seat and an injection port, valve comprising a movable member having a valve seat interposed into the nozzle body and intermittently reciprocated therein; a compressed air supply passage communicating with a compressed air supply source and having an air opening provided on or near at least one of the valve seats of the nozzle body and movable member; and a compressed fuel supply passage communicating with a compressed fuel supply source and having at least one fuel opening provided on the valve seat of the nozzle body and movable member, the valve intermittently controlling the on-off communication of the air and fuel openings of the compressed air and fuel supply passages, and the fuel opening of the compressed fuel supply passage being positioned closer to the injection port than the air opening of the compressed air supply passage.

Abstract: According to the present invention, there is provided a fuel supply system employing an ultrasonic vibratory member of a hollow cylindrically shaped body, comprising a fuel tank for storing fuel therein; a pressurizing and regulating means for pressurizing the fuel supplied from the fuel tank to a predetermined pressure level and regulating the flow rate of the fuel; an ultrasonic wave generating means comprising an ultrasonic wave transducer connected to an ultrasonic wave oscillator for transforming an electric oscillation into mechanical vibrations, a mechanical vibration amplifying portion which is integrally secured to the ultrasonic wave transducer, and an ultrasonic vibratory member of a hollow cylindrically shaped body, having a predetermined length and diameter, which is integrally secured to an output end of the mechanical vibration amplifying portion, with the axis of the member being directed perpendicularly to the axis of the mechanical vibration amplifying portion; and liquid film forming means,

Abstract: A swirl injection valve for injecting pressurized fluid, such as fuel, into an engine or the like through passages connecting a fuel source to an injection port and forming a swirl flow in the fluid prior to injection by introducing the fluid tangentially into a swirl chamber located adjacent the port.