WO2010066184A1 - Fuel supply system for dual fuel automobile - Google Patents

Abstract

A fuel supply system for dual fuel automobile, including: a fuel tank (1) connected with fuel inlet and fuel return pipelines (21, 22; 31, 32), the fuel inlet and fuel return pipelines (21, 22; 31, 32) are connected with an intake manifold assembly. The fuel tank (1) is an integral fuel tank comprising two sub fuel tanks (2, 3), each sub fuel tank (2, 3) is correspondingly connected with a set of the fuel inlet and fuel return pipelines, two sets of the fuel inlet and fuel return pipelines (21, 22; 31, 32) are symmetrically arranged on left and right sides of a bottom part of a vehicle body, the fuel inlet and fuel return pipelines are situated on a same side with the corresponding sub fuel tank.

Description

 Fuel supply system for dual fuel vehicles

 The present invention relates to a fuel supply system for an automobile, and more particularly to a fuel supply system for use in a dual fuel vehicle. Background technique

 With the development of industrial technology, automobiles have become an important means of transportation for people. At present, the main fuel of automobiles is gasoline, which is non-renewable fuel and pollutes the environment. New types of fuels are expected. Nowadays, the sources of fuel for automobile engines are beginning to diversify. Dual-fuel vehicles have been increasingly valued by people. Replacing scarce energy with superior energy and replacing traditional energy with new energy is the main research direction of automotive fuel. Dual-fuel vehicles have become the trend of future automobile development. For example, the Chinese patent application: "Automobile dual fuel supply conversion device (CN2391994)" is a fuel supply system designed for a dual-fuel vehicle with a mixture of gasoline and liquefied petroleum gas. In order to improve the fuel efficiency of the dual fuel, the fuel supply is provided. The fuel conversion of the system is completed by a gasoline electromagnetic shut-off valve and a liquefied petroleum gas electromagnetic shut-off valve. For a dual-fuel vehicle with fuel and gas mixture, a gas supply device is generally added to the original gasoline vehicle, and the gas is delivered to the engine through the switching of various valve bodies, and the supply system of the gasoline oil remains unchanged. Disclosure of invention

The invention mainly provides a fuel supply system for a dual-fuel vehicle which is neatly arranged, convenient for identifying and installing system components, convenient for maintenance and overhaul, and fully utilizing limited space of the vehicle floor; There are technical problems in the installation of large space, unreasonable layout, inconvenient installation and maintenance of system components, and difficulty in identification.

 The invention also provides a fuel supply system for a dual-fuel automobile with simple manufacturing process, good isolation between two fuel tanks, convenient installation, low production cost and improved production efficiency; A separate fuel tank, high production costs, low production efficiency, and unreasonable technical problems in the car.

 The above technical problem of the present invention is mainly solved by the following technical solutions: A fuel supply system for a dual fuel automobile, comprising a fuel tank, wherein the oil tank is connected with an oil inlet and a return oil line, the oil inlet and the oil return The oil pipeline is connected to the intake manifold assembly, the oil tank is an integral fuel tank, the fuel tank comprises two sub-tanks, each sub-tank is connected with a set of oil inlet and return pipelines, and two sets of oil inlet and return pipelines are The left and right sides of the car body are symmetrically arranged, and the oil inlet and return oil pipelines are located on the same side as their corresponding sub-tank tanks. The integral fuel tank has a simple structure, and two sub-tanks are respectively arranged therein. Two independent and integrated fuel tanks can be manufactured by one-shot molding, and one mold can be used to produce two chambers with one large and one small one at a time. The one-piece fuel tank improves production efficiency, reduces production costs, and reduces assembly processes in automobiles. The two sub-tanks are respectively connected to different oil circuit systems, and the sub-tank and its corresponding oil inlet and return oil pipelines are on the same side. For example, the gasoline fuel tank is located on the left side of the fuel tank, and the oil inlet and return oil lines connected to the gasoline fuel tank are also arranged. On the left side of the bottom of the car, and the methanol tank is on the right side, the corresponding oil inlet and return lines are also arranged on the right side of the bottom of the car. The two sets of oil inlet and return lines are symmetrical, easy to distinguish, neatly arranged, and effective. The limited space of the vehicle floor is fully considered, and the convenience of disassembly and maintenance is fully considered. At the same time, all components of a fuel are arranged on the same side for easy identification.

Preferably, the intake manifold assembly comprises two front and rear oil rails fixed on the intake manifold, and the oil inlet and the oil return port of each oil rail are on the same side, and the oil inlet and the oil are externally connected. The connection end of the oil line, The connecting ends of the two sets of oil rails are arranged on both sides of the intake manifold, and the connecting ends of the two sets of oil rails are located on the same side as the corresponding oil inlet and return oil lines. The oil inlet and return ports of the oil rail are on the same side, which is convenient for external oil inlet and return lines, reducing the number of hoses, reducing costs and reducing the assembly process. At the same time, the connection end of each oil rail corresponds to the respective oil inlet and return oil pipelines, for example, the connection end of the gasoline oil rail is located on the left side, corresponding to the gasoline oil inlet and return oil pipeline located on the left side of the vehicle floor; The connection end is located on the right side corresponding to the methanol inlet and return lines on the right side of the underbody. It facilitates the connection of oil inlet and return lines to the fuel rail, which is easy to identify and install, and improves work efficiency.

 5倍倍倍, The volume of the fuel tank is 2. 5~5 times, the volume of the gasoline fuel tank is 2. 5~5 times, The methanol fuel tank and the gasoline fuel tank form an integrated joint structure through a laterally disposed connecting belt, and a feeding port and a feeding exhaust port are arranged on the two sub-tanks, and a check valve is arranged in the feeding port. It is possible to use dual fuels for automotive engines by setting up two separate fuel tanks, one large and one small. At the same time, for methanol vehicles, since the main fuel is methanol, the large fuel tank is set as a methanol fuel tank, and the auxiliary gasoline is a small fuel tank, and there is only one laterally disposed connecting belt between the two fuel tanks. Connected to completely isolate the two fuel tanks. At the same time, two separate and integrated fuel tanks can be manufactured in a single-shot manufacturing process.

Preferably, a methanol gas pipe, a methanol fuel pump and a methanol liquid level sensor are arranged above the methanol fuel tank; an integrated gasoline pump is arranged on the gasoline fuel tank, and the integrated gasoline pump comprises a gasoline fuel pump and a gasoline liquid level sensor. The fuel tank is provided with a methanol fuel pump and a methanol liquid level sensor. The methanol pump is used to transport a certain pressure of methanol to the engine, and the methanol liquid level sensor monitors the fuel remaining amount information in real time; and the auxiliary gasoline uses a small fuel tank. Considering that the small fuel tank itself has a small volume and limited installation space, an integrated gasoline pump is arranged on the small fuel tank, which integrates a gasoline fuel pump and The gasoline level sensor is used to pump gasoline and monitor the remaining amount of gasoline in real time. Therefore, the limited space position is reasonably utilized to achieve the required functions.

 Preferably, the methanol fuel tank and the gasoline fuel tank are provided with rollover valves, each of which is connected with an air guiding tube, and the two air guiding tubes are connected to the evaporation recovery tube through a three-way valve, and the evaporation recovery tube is connected to the fuel of the carbon canister On the steam adsorption port, the fuel vapor desorption port on the canister is connected to the engine through a canister control valve. The canister is an absorption tank containing activated carbon to adsorb fuel vapor evaporates from the fuel tank. When the engine is not operating, the discharged fuel vapor enters the absorption tank. When the engine is started, the internal carbon layer of the fresh air absorption tank is sucked in, and the desorbed fuel vapor is led to the engine. The rollover valve on the two sub-tanks avoids the danger of fuel leakage when the vehicle is tilted or overturned. Two air-conducting pipes are connected to each of the two turrets, and the steam in the oil tank is collected and then led out by the air-conducting pipe, connected to the evaporation recovery pipe through the three-way valve, and then connected to the carbon canister through the adsorption port; the desorbed steam is carbonized The tank control valve controls the input engine to burn with the combustible mixture to reduce evaporative emissions of the fuel. The fuel vapor in the two sub-tanks is recovered by a steam recovery unit. The structure is simple, the limited space is fully utilized, and the disassembly and assembly is convenient.

 Preferably, the gasoline fuel system is equipped with a gasoline fuel tank key for switching a gasoline fuel tank, and the methanol fuel system is equipped with a methanol fuel tank key for switching a methanol fuel tank, the methanol fuel tank The key is also the ignition key of the car. Two keys control two fuel tanks, which are used separately to facilitate differentiation and control, avoiding the mismatch of the two fuels.

 Preferably, each of the two sides of the outer casing of the vehicle body is symmetrically provided with an oil filling port, and each oil filling port is connected to the sub-tank in the oil tank through the fuel filler pipe assembly, each oil filling port and its corresponding sub-tank, oil inlet and The return line is on the same side. There are two fuel level display devices, two fuel alarm devices and a comprehensive fuel state indicating device on the display instrument in the cockpit of the vehicle body, the two fuel level display devices and two fuel alarm devices are Display the left and right symmetrical arrangement on the meter, and the two sets of the bottom of the car body

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Correction page (Article 91) The oil and oil return pipelines are correspondingly distributed, and the two oil filling ports outside the vehicle body and the instrument display devices in the vehicle are all corresponding to the respective fuel supply systems. On the left is the gasoline level indicator, the gasoline fuel shortage alarm device marked with the word "gasoline" and the oil pot pattern; the right side is the methanol level indicator, marked with the word "methanol" and the oil can The pattern of methanol fuel shortage alarm device; convenient identification, always remind drivers and passengers to prevent misfueling. In the middle, there is a fuel state indicating device. When gasoline is used as fuel, the "gasoline" character light is on; when methanol is used as fuel, the "methanol" character light is on.

 Therefore, the fuel supply system of the dual fuel vehicle of the present invention has the following advantages: The two fuels each correspond to a fuel supply system, and the corresponding components of a fuel supply system: a fuel tank, an oil inlet and a return line, and an intake manifold. The pipe assembly, the external oil filling port and the internal display instrument are all located on the same side of the car, which is convenient to distinguish and install and maintain, avoiding the wrong addition of fuel; the two sets of fuel systems are symmetrically arranged, the structure is simple and tidy, the piping system is clearly arranged, and the utilization is fully utilized. A limited space, taking into account the convenience of assembly and disassembly and maintenance. DRAWINGS

 BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic illustration of a fuel supply system for a dual fuel vehicle of the present invention.

 2 is a schematic view of the intake manifold assembly of FIG. 1.

 Figure 3 is a front elevational view of the fuel tank of Figure 1.

 Figure 4 is a plan view of Figure 3.

 Figure 5 is a rear elevational view of Figure 3.

 Figure 6 is a schematic diagram of the meter in Figure 1.

 Figure 7 is a schematic view of the outer casing of the dual fuel automobile of the present invention. Best way to implement the invention

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Correction page (Article 91) The technical solutions of the present invention will be further specifically described below by way of embodiments and with reference to the accompanying drawings. Example:

As shown in FIG. 1 , a fuel supply system for a dual-fuel automobile includes a fuel tank 1 , which is an integrally formed integral fuel tank, and includes two sub-tanks in the fuel tank, the fuel tank on the left side is a gasoline fuel tank 2, and the fuel tank on the right side. For the methanol tank 3, methanol is the main fuel of the dual fuel vehicle, and the volume of the methanol tank 3 is larger than the volume of the gasoline tank 2. The methanol fuel tank 3 is connected with a methanol fuel supply system, the gasoline fuel tank 2 is connected with a gasoline fuel supply system, and two sets of fuel supply systems are symmetrically arranged on the bottom plate of the automobile. The automobile fuel supply system includes a vehicle oil inlet pipe 21 and a return oil pipe 22, and is arranged. On the left side of the car floor, it is connected to the gasoline oil rail 23; the methanol fuel supply system includes a methanol oil feed pipe 31 and a return oil pipe 32, and is disposed on the right side of the car floor to be connected to the methanol oil rail 33. The gasoline fuel rail 23 and the methanol fuel rail 33 are fixed in parallel to the intake manifold, and the intake manifold is connected to the engine 5. The gasoline fuel tank 2 is provided with an integrated integrated gasoline pump 24, the integrated gasoline pump 24 includes a gasoline pump and a liquid level sensor, and the integrated gasoline pump 24 is below the gasoline dump valve 25; the methanol fuel tank 3 is provided with a separate The methanol fuel pump 34 and the methanol level sensor 36 arranged side by side are provided with a methanol rollover valve 35 obliquely below the methanol pump. An air guiding pipe 6 is connected to the gasoline dump valve 25 and the methanol overturning valve 35. The two air guiding pipes 6 are connected to one end of the evaporation recovery pipe 4 through the three-way valve 7 at the upper right of the oil tank, and the evaporation recovery pipe 4 is located at the automobile floor. On the right side, it is on the same side as the oil inlet pipe 31 and the oil return pipe 32 of methanol. The other end of the evaporation recovery pipe 4 is connected to the adsorption port 11 of the canister 37, and the canister 37 is located on the right side of the engine 5, and the desorption port 12 of the canister 1 is connected to the engine 5 through the canister control valve 8. As shown in FIG. 7, a gasoline filling port 61 is disposed on the left side of the outer casing of the vehicle body, and the gasoline filling port 61 is connected to the gasoline feeding port 501 of the gasoline fuel tank 2 in the oil tank through the gasoline fueling pipe assembly 43; The right side of the outer casing is provided with a methanol filling port 60, and the methanol filling port is connected to the methanol feeding port 50 of the methanol tank 3 in the oil tank by adding a methanol oil pipe assembly 44. As shown in Fig. 6, two display fuel level display devices, two fuel alarm devices and one integrated fuel state indicating device are arranged on the display instrument in the cockpit of the vehicle body, and the gasoline liquid level display instrument 45 is on the left side. The gasoline fuel shortage alarm device 46 marked with the word "gasoline" and the oil pot pattern; the methanol liquid level display instrument 47 on the right side, the methanol fuel shortage alarm device marked with the word "methanol" and the oil pot pattern 48; In the middle, there is a display fuel state indicating device 62. When gasoline is used as fuel, the "gasoline" character light is on; when methanol is used as fuel, the "methanol" character light is on.

 As shown in FIG. 2, two front and rear oil rails are fixed on the intake manifold 38, the front oil rail is a methanol oil rail 33, and the oil inlet 39 and the oil return port 40 of the methanol oil rail 33 are located in the intake manifold. On the right side, the oil inlet line 31 and the return line 32 of the methanol are connected; the rear oil rail is a gasoline oil rail 23, and the oil inlet 41 and the oil return port 42 of the gasoline oil rail 23 are located at the left of the intake manifold 38. The side is connected to the oil feed line 21 and the return line 22 of the gasoline.

As shown in Figures 3, 4 and 5, the twin-fuel tank includes a methanol fuel tank 3 and a gasoline fuel tank 2, and the methanol fuel tank 3 has a volume of 40 liters, and is provided with a methanol fuel pump 34 and a methanol liquid. The position sensor 36, the methanol rollover valve 35 and the methanol air intake pipe 49; the gasoline fuel tank 2 has a volume of 12 liters, and is provided with an integrated gasoline pump 24 and a gasoline rollover valve 25, and the integrated gasoline pump 24 includes a gasoline fuel pump and a gasoline liquid. The position sensor, the rollover valve 25 is connected to the vehicle fuel evaporation recovery device, and the methanol fuel tank 3 is provided with a methanol feed port 50 and a methanol feed exhaust port 51. The gasoline fuel tank 2 is provided with a gasoline feed port 501 and a gasoline feed exhaust. The port 511, the methanol feeding port 50 and the gasoline feeding port 501 are provided with a one-way valve, the bottom of the two fuel tanks is provided with a fuel tank fixing groove 52, and the corner of the gasoline fuel tank is provided with a fixing plate 53, the bottom of the methanol fuel tank A pipeline slot 54 is provided, and an integrated connecting structure is formed between the gasoline fuel tank 2 and the methanol fuel tank 3 through a laterally disposed connecting belt 55. The methanol fuel tank 3, the gasoline fuel tank 2 and the connecting belt 55 are all six layers of plastic. Composite structure . A methanol filter holder 56 is disposed on the methanol fuel tank 3, and a gasoline filter holder 57 is disposed on the gasoline fuel tank 2, and an exhaust gas is disposed near the connecting belt 55 between the gasoline fuel tank 2 and the methanol fuel tank 3. The tank 58 and the gasoline fuel tank 2 and the methanol fuel tank 3 on both sides of the exhaust pipe groove 58 are provided with a fixing seat 59 for fixing the heat insulating plate between the automobile exhaust pipe and the fuel tank.

 The gasoline fuel tank 2 is equipped with a gasoline fuel tank key for switching the gasoline fuel tank 2, and the methanol fuel tank 3 is equipped with a methanol fuel tank key for switching the methanol fuel tank.

 The above description is only a preferred embodiment of the invention and is not intended to limit the invention in any way. Although the present invention has been disclosed above in the preferred embodiments, it is not intended to limit the invention. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention by using the methods and technical contents disclosed above, or modify the equivalents of equivalent changes without departing from the scope of the technical solutions of the present invention. Example. Therefore, any simple modifications, equivalent changes, and modifications of the above-described embodiments in accordance with the technical spirit of the present invention are still within the scope of the technical solutions of the present invention.

Claims

Rights request  A fuel supply system for a dual fuel automobile, comprising a fuel tank, the fuel tank being connected with a fuel evaporation recovery device, an oil inlet and a return oil line, wherein the oil inlet and return oil lines are connected to an intake manifold assembly The fuel tank is an integral fuel tank, and the fuel tank comprises two sub-tanks, each of which is connected with a set of oil inlet and return lines, and two sets of oil inlet and return lines are at the left and right sides of the bottom of the vehicle body. Symmetrically arranged, the oil inlet and return lines are on the same side as their corresponding sub-tanks.  2. The dual fuel vehicle fuel supply system according to claim 1, wherein the intake manifold assembly comprises two front and rear oil rails fixed to the intake manifold, each set of fuel rails. The oil inlet and the oil return port are located on the same side. As the connecting end of the external oil inlet and return oil pipelines, the connecting ends of the two oil rails are arranged on both sides of the intake manifold, and the connecting ends of the two oil rails are connected thereto. The corresponding oil and return lines are located in the same 3 . The fuel supply system for a dual fuel vehicle according to claim 1 , wherein: one of the two sub-tanks of the integrated fuel tank is a methanol fuel tank, and the other one is a gasoline fuel tank, the The methanol fuel tank has a volume of 2. 5 to 5 times that of the gasoline fuel tank, and the methanol fuel tank and the gasoline fuel tank form an integrated joint structure through the laterally disposed connecting belt, and the feeding ports are provided on the two sub tanks. And the feed vent, there is a check valve in the feed port.  4. The fuel supply system for a dual fuel vehicle according to claim 3, wherein: a methanol gas pipe, a methanol fuel pump, and a methanol liquid level sensor are disposed above the methanol fuel tank; and the gasoline fuel tank is provided with an integrated type. Gasoline pumps, integrated petrol pumps include gasoline fuel pumps and petrol level sensors. 5. The fuel supply system for a dual fuel vehicle according to claim 3, wherein: the methanol fuel tank and the gasoline fuel tank are provided with rollover valves, each of which is connected to an air guiding tube, and the two air guiding tubes are passed through. The three-way valve is connected to the evaporation recovery pipe, and the evaporation recovery pipe is connected to the fuel vapor adsorption port of the carbon canister Above, the fuel vapor desorption port on the canister is connected to the engine through a canister control valve.  6. The fuel supply system for a dual fuel vehicle according to claim 3, wherein: said gasoline fuel tank is provided with a gasoline fuel tank key for switching a gasoline fuel tank, and said methanol fuel tank is provided There is a methanol fuel tank key for switching the methanol fuel tank, and the key of the methanol fuel tank is also the ignition key of the automobile.  The fuel supply system for a dual fuel automobile according to any one of claims 1 to 6, wherein: a fuel injection port is provided symmetrically on both sides of the outer casing of the vehicle body, and each oil injection port passes through the fuel filler pipe. The assembly is connected to a sub-tank in the fuel tank, and each of the oil filling ports is located on the same side as its corresponding sub-tank, oil inlet and return lines.  The fuel supply system for a dual fuel automobile according to any one of claims 1 to 6, wherein: two fuel level display devices, two fuel alarm devices, and two display devices are provided on the display instrument in the cockpit. An integrated fuel state indicating device, the two fuel level display devices and the two fuel alarm devices are arranged symmetrically on the display meter, corresponding to the two sets of oil inlet and return oil pipelines at the bottom of the vehicle body. 10  Correction page (Article 91)