A carburetor with a fuel adjustment tamperproof valve assembly and specialized tools for adjusting the valve assembly. A needle valve is received in a recess in a carburetor body with a passage open to the exterior of the body and a cylindrical surface of the passage. A valve head with a cylindrical exterior surface is received in the passage with a slight clearance between them. The specialized tools are engageable with the head to adjust the valve by rotating it.

The use of ultrasound or acoustics applied at a level below that which causes cavitation to control the energy balance between particles and the liquid phase in a metastable liquid.

Multi Fluid Injection Mixer for injecting gas and/or liquid as admixture fluid to gas and/or liquid flowing through a pipe, and homogeneously mixing the admixture fluids and pipe fluids, said injection mixer constituting a section of the pipe, distinguished in that the injection mixer is comprising: at least one contacting element having at least one contacting surface facing and deflecting some of the pipe fluid flow, forming a constriction to the internal cross-section of the pipe, such that the pipe fluid flow is accelerated and fluid flowing in the vicinity of said surface is deflected to flow along the surface until the surface end over a sharp edge at the point of maximum constriction and flow velocity, at least one injection element arranged with a fluid connection to said surface of the contacting element, such that admixture fluid can be injected onto said surface and along said surface be entrained by the flowing pipe fluid over the sharp edge, but for a contacting element formed as a contracting pipe section at least two injection elements are provided.

The present invention provides a desulfurization agent mixing system for fuel oil used in harbors, the system including: a fuel oil tank for storing fuel oil; a desulfurization agent tank for storing a desulfurization agent; a line mixer receiving and mixing the fuel oil and the desulfurization agent from the fuel oil tank and the desulfurization agent tank; a droplet atomization unit for forming droplets of a mixture of the fuel oil and the desulfurization agent, the mixture being generated by the line mixer; a magnetization unit for magnetizing the mixture in which the droplets are contained; a vortex reaction unit for turning the mixture of the fuel oil and the desulfurization agent, which is magnetized by the magnetization unit; a gas separation unit configured to separate gas contained in the fuel oil and the desulfurization agent mixture in the vortex reaction unit; a collision emulsion unit configured to cause the mixture of the fuel oil and the desulfurization agent from which the gas is separated by the gas separation unit to collide against a collision target; and an emulsion tank for storing the mixture of the fuel oil and the desulfurization agent, which is collided by the collision emulsion unit.

An apparatus for mitigating contamination in a fuel supply is an ultrasonic generator coupled with a piezoelectric transducer that propagates ultrasonic waves through a fuel tank. In some embodiments the apparatus is used to mitigate the growth of microbial organisms. In other embodiments the apparatus is used to emulsify water into the fuel, particularly in diesel fuel. The apparatus addresses water and microbial growth found in boats, cars, and aircraft as well as in storage tanks such as those used at fuel stations. In some embodiments, the fluid is diesel fuel.

A system for producing an oil-in-water emulsion; the system comprising: a first input for coupling to a source of fuel on a vehicle; a second input for coupling to a source of water; a third input for coupling to a source of first additive; a mixing section for mixing the water and the first additive to form an aqueous phase; and a blender for blending the aqueous phase with the fuel to form the oil-in-water emulsion; wherein the first input is coupled to the blender; the second input and the third input are coupled to the mixing section; and the mixing section is coupled to the blender.