SI24208A - Device for preparation of lpg for injection into internal combustion engine - Google Patents

Abstract

The invention relates to a device for the preparation of liquefied petroleum gas for dosing into an internal combustion engine, the characteristic of which is that the heat transfer medium is formed in laminar curves. The gas, as shown at the entrance to the pressure part of the container (2), is divided into two or more parallel flows separated by the blades (5). The curvature of the lamellae (5) causes the gas to flow from one blade to the other and touching both, thus achieving optimal evaporation, gasification by heat emission. The reversible role is performed by the blades (6) on the heating part (1). Thermal energy is then transferred to the curved blades (6) in the heating part (1), the latter transmitting heat energy to the blades (5) in the gasification part (2). Liquefied petroleum gas which passes through the valve through the valve (3) in the forced flow through the curved blades (5) actively directs into contact with the lamellas (5), and at the contact it assumes its own thermal energy.

Description

[001] The object of the invention is a device (degasser) for the preparation of liquefied petroleum gas for dosing into an internal combustion engine, preferably butane gas, propane, as a gas in the gaseous state for optimal response in gasification. The so-called petroleum gas is commercially available in liquid state at a pressure of approx. 4-15 bar.

Technical Problem [002] The technical problem to be solved by the invention is how to design such a device for preparing gas from a liquid state to a gaseous state as a fuel under pressure of approx. 0.9 - 3.5 bar, which will provide optimum responsiveness and proper combustion with respect to the current consumption or the need to provide the right amount of gas under the right pressure, thus providing the right mixture of fuel and air via electronics. The device according to the invention is also adapted for the first or second installation in any vehicle.

BACKGROUND OF THE INVENTION [003] Such known evaporators are designed as a container that is processed with a thermally conductive material (aluminum or aluminum alloy is usually used for reasons of cost) that separates the water heating part with the gas evaporation part. The design of the container must be designed in such a way that the transfer of temperature from the water part to the gaseous part is optimal and provides rapid and efficient gasification. The shape of the gaseous part is also shaped so that the gas is pushed against the wall through the container, since the contact of the gas with the aluminum medium causes efficient gasification. The known evaporators of this type thus use different shapes where, as a result of the shape, centrifugal forces are generated and or turbulence causing the gas in the evaporation stage to contact the aluminum walls to achieve effective evaporation (Fig. 3). A disadvantage of the known solutions is that the turbulence (9) that arises behind the obstacles that cause the droplets to contact the walls gives them undesirable side effects, such as slowing the flow and thus reducing the evaporator response ("reducer"). Slowing down the flow means poor responsiveness and too slow regulation of the right amount of fuel at the right required pressure. Too little pre-cooked fuel under too low pressure causes the fuel mixture to overflow, which raises the combustion temperature and can consequently damage the engine parts of the vehicle.

Solution to a Technical Problem [004] A solution to a technical problem would be a laminar-formed medium whose production in a sealed container is extremely demanding and unacceptable. Because of its large surface area, the laminami medium causes an optimal transfer of thermal energy. The described technical problem is solved with the device according to the invention, characterized in that the medium of heat transfer is formed in the lamina curves. The device is optimized by reducing the number of blades and bending them, which causes gas to mix and repel gas from the walls, but does not cause turbulent flow, which in known solutions slows the flow of gas through the gasification vessel and reduces the efficiency and regularity of the prepared fuel. The curved lamina flow thus causes a high degree of heat transfer and efficient evaporation of the liquefied petroleum gas to prepare its use in the gaseous state for internal combustion engines.

[005] In more detail the essence of the invention will be explained by the description of an embodiment with reference to the accompanying drawings, in which

FIG. 1 carburettor display - lower water part

FIG. 2 Carburettor Display - Upper Carburetor Part

FIG. 3 shows the formation of problematic turbulence in known solutions [006] The apparatus according to the invention consists of a vessel consisting of a water heating part (1) and a pressure evaporating, gasification part (2). The valve (3) for supplying liquid gas to the tank may be mechanical using a diaphragm or electromagnetic using electronics and sensors for the controlled release of liquefied gas into the gasification portion of the tank. The object of the device of the invention is to provide the required overpressure in the intake manifold of the internal combustion engine at the outlet (4) of the gas from the gasification section or, consequently, at the gas injectors which are not part of the invention. The essential part of the device is the curved blades (5.6), thickness from 0.50 mm to 5.00 mm, height from 5mm to 30mm, where the curvature of the blades is defined by curves in the form of parts of circles, ellipse parts, sinusoidal shapes and similar curved shapes and the radius of curvature of the blades is in the range of 5.00 mm to 30.00 mm in diameter of said possible shapes, and the passage of curvature from one shape to another may also be through the straight part of the lamella and the various radii of said possible shapes. This ensures optimal transfer of thermal energy from the coolant of the internal combustion engine or other thermal medium that enters and exits the water portion (1) of the tank through the connecting tube (8), first to the curved blades (6) of the aluminum of the medium on the water heating part (1) through the intermediate wall to the curved lamellae (5) in the gasification part (2) on the gas entering the fusible part (2) through the connection (7). Due to the shape of the blades, the gas is forced into contact with the curved blades (5) in the gasification section, which allows the gas to optimize evaporation and gasification. The slats reach the top of the water or gasification work.

[007] As gas we use liquefied petroleum gas which is pressurized on the market for approx. 4-15 bar (butane, propane). From the price point of view of large-scale production, it is advisable to make a dimension-adapted device according to the invention for a particular engine model.

[008] As shown in Figure (1), the gas is divided into two or more parallel streams separated by the slats (5) after entering the gasification portion of the container (2). The curvature of the blades causes the gas to pass from one blades to the other and touch them both, thus achieving optimum evaporation, gasification by the emission of thermal energy. The reverse role is performed by the slats (6) on the water heating part (1). Water or other medium is divided into two or more parallel streams at the inlet of the water part of the vessel and the curved blades (6) cause mixing of water and uniform and optimal transfer of thermal energy from the water part to the medium of heat transfer from the water part to the gas part of the vessel ( usually the medium is an aluminum alloy). When designing the water part of the tank, care must be taken to cross the flow because, due to the possible sequential attachment of the device to the cooling system on the secondary market, the flow of coolant must not be inhibited, which in turn may lead to the malfunctioning of the moto. For this reason, the cross-section of the flow of water or other medium in the water part (1) must be at least 0 11.00 mm. The cross-section may be smaller, but in this case it is necessary to make a parallel connection to the engine cooling system or to a part that did not cause a negative effect due to the coolant flow limitation during installation. It is also necessary to take into account the gas flow cross-section, which must be at least 0 7.00 mm up to a maximum of 0 25.00 mm, when designing the gasification part (2), which ensures optimum gas flow and forces the gas to actively use the shape curved blades. The intermediate wall on which the slats are fixed between the water and gas parts must be as thin as possible, but must still ensure that the gas in the gas part of the tank (2) is sealed to the prescribed pressures. The displacement between the slats (6) in the water part (1) and between the slats (5) in the gasification part (2) must be as small as possible by the production processes, and there must be more slats (6) in order to achieve optimal heat transfer and flow cross-section (6 , 5) positioned without delay, which means that the lamella (6) in the water part (1) stands directly below the lamella (5) in the gasification part (2). The intermediate wall together with the slats (5, 6) is designed as a single casting.

[009] To control the valve (3), it is contemplated to use an electromagnetic or servo valve with the control and control of the electronics that guide the valve (3) based on the required pressure between the pressure in the intake manifold and the gas pressure at the outlet of the blowing part or the pressure on the injectors, which these are measured by appropriate sensors or by a diaphragm-guided valve (3) providing the required mechanical pressure.

[0010] It is understood that one skilled in the art of the foregoing description of the invention or its embodiments may also design new embodiments, particularly in terms of industrial design and adaptation to particular requirements, without circumventing the features of the invention as defined in the following claims.

Claims (4)

Patent claims A device for the preparation of liquefied petroleum gas for metering into an internal combustion engine consisting of a vaporizing portion of a vessel (2), a heating portion of a vessel (1), a valve (3) for inflowing liquefied gas into a vaporizing portion (2), outlet (4) gas from the evaporator part and connecting pipes (8) for supply and discharge of coolant or other thermal medium to the water part (1), characterized in that the curved blades (5,6) are fixed in the water part (1) and the gasification section (2) to the intermediate wall and extending to the top of the water or water well. the gasification part and the curvature of the blades ensure the mixing and transfer of heat between the gas and the coolant or other heat medium and the intermediate wall together with the blades (5, 6) is designed as a single cast. Device according to claim 1, characterized in that the curvature of the blades is defined by curves in the form of parts of circles, ellipse parts, sinusoidal shapes and the like curved shapes, and the passage of the curvature of the blades from one shape to another may also be through a straight part of the lamella as small as possible between the slats (6) in the water part and between the slats (5) in the gasification section, several slats (6, 5) must be positioned without any lag, which means that the slats (6) in the water part (1) are directly below the blade (5) in the gasification section (2). Apparatus according to claim 1, characterized in that the slats (5,6) and the intermediate wall are made of aluminum or aluminum alloys. Apparatus according to claim 1, characterized in that the curved lamellae (5) in the evaporating portion of the vessel direct the flow of liquefied petroleum gas and the curved lamellae (6) in the aqueous portion (1) of the vessel direct the flow of coolant or other thermal medium. .