46results about How to "Promote micronization" patented technology

In the present invention, a shaping air ring (10) is configured from a body (11), a cover (13), and a nozzle (15). The tip of the nozzle (15) is provided with a tapered conical protrusion (17) that is abutted against the cover (13) in a gapless contacted state. A plurality of inclination grooves (20) are provided along the entire circumference of a tapered taper surface (17C) of the conical protrusion (17). Furthermore, first shaping-air injection holes (23), which inject shaping air towards a discharge edge (9E) of a rotary atomizing head (9), are provided between each inclination groove (20) and the inner circumferential surface (13B2) of the cover (13). A second shaping-air injection hole (24), which injects shaping air along the outer circumferential surface (9C) of the rotary atomizing head (9), is provided to an inner circumferential surface (16A) of the nozzle (15).

The present invention provides a gas turbine combustor that has, as means for atomizing liquid fuel, a fuel injection nozzle using a fluid other than liquid fuel to atomize the liquid fuel and that can suppress a reduction in power generation efficiency resulting from a heat loss while promoting the atomization of the liquid fuel. The gas turbine combustor 3 is adapted to mix liquid fuel with combustion air led from a compressor, burn the mixture and supply combustion gas generated to a gas turbine. The gas turbine combustor includes, on the upstream side thereof, a fuel injection nozzle that atomizes the liquid fuel into fine liquid droplets. The fuel injection nozzle includes a first system adapted to supply the liquid fuel and a second system adapted to supply a fluid for atomizing the liquid fuel. Low-boiling liquid fuel is supplied to the second system as the fluid. The second system is adapted to heat and supply the low-boiling liquid fuel.

In a device for starting an engine, in which when the engine is restarted from idling stop, a cylinder which is restarted initially among all cylinders is determined on the basis of a piston stoppingposition of each cylinder in the idling stop, if there is a specified cylinder which is judged to cause a misfire when the specified cylinder is restarted initially among all cylinders, a piston stopping position of the specified cylinder in the idling stop is controlled such that the specified cylinder does not become a cylinder which is restarted initially among all cylinders.

In an exhaust gas purification apparatus for an engine includes a bubble generation device, the bubble generation device for mixing nano-sized to micro-sized bubbles into a liquid reducing agent or a precursor thereof injection-supplied from an injection nozzle is disposed in a reducing agent supply system running from a reducing agent tank to the injection nozzle. When the liquid reducing agent or the precursor thereof is injection-supplied from the injection nozzle, the liquid reducing agent or the precursor thereof is divided by bubbles, and the bubbles are radically inflated and burst by a pressure change and a temperature change at the time of injection-supplying, so that microparticulation of the liquid reducing agent or the precursor thereof is facilitated.

A control device for internal combustion engines, having: a first fuel injection valve that injects fuel directly into a combustion chamber; and a pressure regulator capable of changing the fuel pressure supplied to the first fuel injection valve. When prescribed fuel cut conditions are met, a fuel cut is implemented whereby fuel injection by the first fuel injection valve is stopped. When prescribed fuel cut recovery conditions are met during fuel cut, fuel injection by the first fuel injection valve is recommenced. When fuel injection is recommenced after fuel cut, the fuel pressure supplied to the first fuel injection valve is set higher than the normal fuel pressure determined in accordance with the driving state. As a result, spray atomization and vaporization are promoted and the exhaust particle discharge amount and the number of discharged exhaust particles can be suppressed, when recommencing fuel injection after fuel cut has ended.

To sufficiently atomize and inject a fuel flowing from the fuel injection port of a fuel injector. In this nozzle plate (3), part of the fuel flowing from the fuel injection port of a fuel injector is atomized by collision with an interference body (16), which abruptly bends the flow thereof to collide with fuel which would have tended to advance directly through a nozzle hole (7) and an orifice (8), bringing into turbulence the flow of said fuel which would have tended to advance directly through the nozzle hole (7) and the orifice (8). In addition, in this nozzle plate (3), since both ends of the orifice (8) assume a state in which the liquid film of the fuel injected from the sharp, unrounded corner portions (22) and the vicinity thereof is thin and sharply pointed, and the end portion of the liquid film of the fuel injected from the orifice (8) is easily atomized by friction with the air. Consequently, this nozzle plate (3) can improve the degree of fuel atomization as compared with conventional nozzle plates.

The present invention provides a fuel injection valve, wherein each injection hole is composed of an injection hole main body and a large-diameter portion adjacent to the downstream of the injection hole main body to form an outlet of the injection hole. When each nozzle hole is vertically projected onto a plane perpendicular to the axis of the valve seat, the inlet center and outlet center of the nozzle body on the plane are arranged on radial straight lines passing through the axis of the valve seat respectively, and the center of the outlet It is arranged in a direction away from the axis of the valve seat relative to the center of the inlet. The center of the large-diameter portion deviates from the straight line, so that the length of the inner wall of the spray hole on the side of the valve seat axis is asymmetrical with respect to the straight line.

The invention relates to a vortex chamber combustion system utilizing umbrella-shaped spraying, which belongs to the fields of formation and combustion of engine mixing gases. The vortex chamber combustion system utilizing an oil nozzle with an umbrella-shaped spraying has the structural characteristics that the center line of the oil nozzle with an umbrella-shaped spraying way is superposed withthe center line of a main passage so that the air which flows into a vortex chamber from a compression stroke via the main passage turns back along the wall surface of the vortex chamber to form vortex after reaching the vicinity of the head part of the oil nozzle; the direction of the vortex is just along the diffused direction of the umbrella-shaped spraying so as to accelerate oil and gas mixture and improve the combustion. Because the characteristics of short penetrating distance, even circumferential distribution and high granulation of the umbrella-shaped spraying are reasonably utilized, the favorable mixture and combustion can be obtained at lower vortex strength, thereby reducing heat dissipation loss and throttling loss and further improving the heat efficiency of an engine. Experiments on a single-cylinder 195 diesel engine indicate that the power is improved by 10 percent, the oil consumption is reduced by 8 percent, the discharge of NOx is reduced by 10 percent and the discharge of soot is reduced by 20 percent after the vortex chamber combustion system utilizing the oil nozzle with a umbrella-shaped spraying way is adopted.

The angle formed by the central axes (Ac1) when the central axes (Ac1) are shifted so as to overlap at the inlet opening (131) in all combinations of the two injection holes (13) is The angle between the two nozzle holes (13) of the combination of the smallest angle between the nozzle holes is set as γamin (deg), and the respective central axes (Ac1 ) on the section taken by the virtual plane of the injection hole (133), that is, the angle formed by the contour of the injection hole inner wall (133), that is, the cone angle is respectively set as θa1, θa2 (deg), and the fuel passage (100) when injecting fuel from the injection hole (13) The average pressure of the fuel is set as P (MPa), then the injection hole (13) is formed to satisfy γamin≥θa1+θa2+0.5×P 0.6 Relationship.

The present invention provides a liquid ejection nozzle which can reduce loss of kinetic energy and atomize and spray liquid, thereby promoting mixing with other gases and promoting reaction between the liquid and other gases. The liquid ejection nozzle is provided with a plurality of tip tips, each of which has an ejection hole, at the tip of a nozzle body. A swirling flow chamber is formed in the tip tip so as to surround the injection hole, and a fine hole is formed in the tip section so as to communicate with the tip of the conical surface of the swirling flow chamber of the tip tip from the tip-side wall surface on the tip side of the valve seat of the hollow section. By lifting and lowering the needle valve, the liquid in the liquid flow path flows into the swirling flow chamber from the communicating fine hole in the tangential direction to generate a swirling flow, and the swirling flow is sprayed to the outside from the spray hole.