A high-mounted fuel tank refueling device

Abstract

The present invention relates to the technical field of application of vehicle fuel supply systems, and in particular to a high-mounted fuel tank refueling device, comprising a low-mounted auxiliary fuel tank, a high-mounted main fuel tank and an electric fuel pump, wherein the low-mounted auxiliary fuel tank comprises a refueling port arranged thereon, an auxiliary fuel tank liquid level sensor arranged therein and an auxiliary fuel tank oil outlet arranged below its side wall; a main fuel tank oil inlet is arranged on the top of the high-mounted main fuel tank, and a main fuel tank liquid level sensor is arranged inside the main fuel tank; the auxiliary fuel tank oil outlet is connected to the main fuel tank oil inlet through an electric fuel pump, and the oil inlet of the electric fuel pump is connected to the auxiliary fuel tank oil outlet through an oil hose; the oil outlet of the electric fuel pump is connected to the main fuel tank oil inlet through a refueling connecting pipe. The present invention can solve the problem of needing to raise the refueling gun to the position above one's head when refueling, and the installation layout space requirement is small, which meets the pursuit of space and has a low installation height.

Description

Technical Field

[0001] The invention relates to the technical field of application of a vehicle fuel supply system, and in particular to a high-mounted fuel tank refueling device. Background Art

[0002] With the development of the global travel and tourism industry, passengers have higher and higher requirements for the comfort and convenience of sightseeing trips, so double-decker sightseeing (dining) cars came into being. In order to maximize the space inside the car, double-decker sightseeing (dining) cars are all low-floored before the drive axle, and the space between the drive axle and the second floor is generally used to arrange the fuel tank, luggage and vehicle spare parts. At the same time, in order to have as large a luggage compartment space as possible and to ensure that the vehicle has sufficient cruising range, designers often design the fuel tank to be very high and narrow, because this design can not only utilize the minimum bottom area and reduce the space occupied by the fuel tank, but also make full use of the height direction space and increase the fuel tank capacity. However, such a design often makes the fuel tank filling port located very high, generally reaching a height of at least 1.8 meters. For a 1.8-meter-high fuel tank filling port, the refueling staff needs to raise the refueling gun to above their head and then "blindly fill up", and they have to keep holding the refueling gun until the fuel is filled up to four or five hundred liters. This goes against the ergonomic design concept. Even if the customers can accept it, it is very unfair to the refueling staff.

[0003] Based on the above reasons, the present invention proposes a high-mounted fuel tank refueling device. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a high-mounted fuel tank refueling device, which can well solve the problem of needing to raise the refueling gun to the top of one's head when refueling, and has a small installation space requirement, meets the pursuit of space, and has a low installation height.

[0005] In order to achieve the purpose of the present invention, the technical solution adopted by the present invention is:

[0006] The present invention discloses a high-mounted oil tank refueling device, comprising a low-mounted auxiliary oil tank, a high-mounted main oil tank and an electric oil transfer pump, the low-mounted auxiliary oil tank comprises a refueling port arranged thereon, an auxiliary oil tank liquid level sensor arranged therein and an auxiliary oil tank oil outlet arranged below the side wall thereof; a main oil tank oil inlet is arranged on the top of the high-mounted main oil tank, and a main oil tank liquid level sensor is arranged inside the main oil tank; the auxiliary oil tank oil outlet is connected to the main oil tank oil inlet through an electric oil transfer pump, and the oil inlet of the electric oil transfer pump is connected to the auxiliary oil tank oil outlet through an oil transfer hose; the oil outlet of the electric oil transfer pump is connected to the main oil tank oil inlet through a refueling connecting pipe.

[0007] Auxiliary tank vents and main tank vents are respectively provided on the tops of the low-mounted auxiliary tank and the high-mounted main tank, and the auxiliary tank vents and the main tank vents are communicated with each other through a refueling ventilation pipe.

[0008] A liquid level scale is provided on the low-mounted auxiliary oil tank. When the liquid level scale is 1 / 5, the output resistance of the auxiliary oil tank liquid level sensor is 40 ohms; when the liquid level scale is 2 / 5, the output resistance of the auxiliary oil tank liquid level sensor is 60 ohms; when the output resistance of the main oil tank liquid level sensor reaches 160 ohms, the high-mounted main oil tank is full of oil.

[0009] It also includes a control module, which is connected to the auxiliary fuel tank level sensor, the main fuel tank level sensor, and the electric fuel pump through an insulating wiring harness, and controls the working state of the electric fuel pump by collecting resistance signals of the auxiliary fuel tank level sensor and the main fuel tank level sensor; when the liquid level scale on the low-mounted auxiliary fuel tank is greater than 2 / 5, the output resistance of the auxiliary fuel tank level sensor collected by the control module is greater than 60 ohms and the output resistance of the main fuel tank level sensor is less than 160 ohms, and the control module controls the electric fuel pump to input the fuel in the low-mounted auxiliary fuel tank into the high-mounted main fuel tank; when the control module collects that the output resistance of the main fuel tank level sensor reaches 160 ohms, it controls the electric fuel pump to stop working.

[0010] The control module controls the oil delivery of the electric oil pump by controlling the pulse width signal of the electric oil pump. The oil delivery of the electric oil pump is synchronously adjusted by the change of the output resistance value of the auxiliary oil tank liquid level sensor, so that the liquid level scale of the low-mounted auxiliary oil tank is between 2 / 5 and 3 / 5.

[0011] The top of the high-mounted main oil tank is provided with a main oil tank oil return interface and a main oil tank vent valve, and the bottom thereof is provided with a main oil tank oil drain screw plug.

[0012] The electric oil pump is a diaphragm type magnetic pump.

[0013] The oil delivery hose, the refueling connecting pipe and the refueling vent pipe are rubber pipes resistant to fuel oil corrosion.

[0014] The beneficial effects of the present invention are:

[0015] The patent of this invention compiles two main control logics according to two resistance models, which can meet all possible refueling situations.

[0016] The low-mounted auxiliary fuel tank of the present invention is a small-volume fuel tank, which requires little installation space and meets the space requirements of this type of vehicle. The low-mounted auxiliary fuel tank is equipped with a refueling port and has a low installation height for convenient refueling.

[0017] The patented high-mounted main oil tank of the present invention is installed at a higher position above the drive axle. Its appearance is long and high, but very narrow, which has a high space utilization rate for the whole vehicle and helps to free up space for luggage and spare parts.

[0018] The electric oil pump used in the patent of the present invention is a diaphragm magnetic pump which uses fuel as the conveying medium, has an insulated shell, good electromagnetic compatibility, and pulse width speed regulation.

[0019] The oil delivery hose, refueling connecting pipe and refueling vent pipe used in the patented invention are all rubber pipes resistant to fuel corrosion, with reliable performance and long service life.

[0020] The control module used in the patent of the present invention is connected with the auxiliary fuel tank level sensor, the main fuel tank level sensor and the electric fuel pump through the insulating wiring harness, and collects the resistance signals of the auxiliary fuel tank level sensor and the main fuel tank level sensor to control the working state of the electric fuel pump.

[0021] The refueling vent pipe used in the patent of the present invention has one end connected to the vent of the auxiliary fuel tank and the other end connected to the vent of the main fuel tank, so that the main fuel tank and the auxiliary fuel tank are connected, and space replacement can be performed, so that the electric fuel pump can transfer oil from the auxiliary fuel tank to the main fuel tank more smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a front view of the present invention;

[0023] Figure 2 It is a right side view of the present invention;

[0024] Figure 3 It is a top view of the present invention.

[0025] In the figure: a low-mounted auxiliary fuel tank 1, a high-mounted main fuel tank 2, an electric fuel pump 3, a refueling port 4, a liquid level sensor for the auxiliary fuel tank 5, an oil outlet of the auxiliary fuel tank 6, an oil inlet of the main fuel tank 7, a liquid level sensor for the main fuel tank 8, an oil delivery hose 9, a refueling connecting pipe 10, an air vent of the auxiliary fuel tank 11, an air vent of the main fuel tank 12, a refueling vent pipe 13, an oil return interface of the main fuel tank 14, a vent valve of the main fuel tank 15, and an oil drain plug 16 of the main fuel tank. DETAILED DESCRIPTION

[0026] The present invention is further described below:

[0027] See also Figure 1-3 ,

[0028] The present invention discloses a high-mounted oil tank refueling device comprising a low-mounted auxiliary oil tank 1, a high-mounted main oil tank 2 and an electric oil delivery pump 3.

[0029] The low-mounted auxiliary fuel tank 1 includes a refueling port 4 arranged thereon, an auxiliary fuel tank liquid level sensor 5 arranged therein, and an auxiliary fuel tank oil outlet 6 arranged below the side wall thereof. The low-mounted auxiliary fuel tank 1 is a fuel tank with a small volume (about 20 liters). The low-mounted auxiliary fuel tank 1 is installed and fixed on the low floor in front of the drive axle. The refueling port 4 is close to the side edge of the vehicle and the height from the ground is about 0.6 meters, which is convenient for refueling.

[0030] The top of the high main oil tank 2 is provided with a main oil tank oil inlet 7, and a main oil tank liquid level sensor 8 is provided inside the high main oil tank 2. The high main oil tank 2 is installed above the drive axle at a higher position, and its rated capacity can be 400 to 500 liters according to the luggage compartment space and vehicle cruising range requirements. The design principle of the high main oil tank 2 is to make it as high and narrow as possible, which has a high space utilization rate for the whole vehicle and helps to free up space for luggage and spare parts.

[0031] The auxiliary tank oil outlet 6 is connected to the main tank oil inlet 7 via the electric oil pump 3, and the oil inlet of the electric oil pump 3 is connected to the auxiliary tank oil outlet 6 via an oil hose 9; the oil outlet of the electric oil pump 3 is connected to the main tank oil inlet 7 via a refueling connecting pipe 10. The low-mounted auxiliary tank 1 is a small-volume fuel tank with a small installation space requirement, which meets the space requirements of this type of vehicle; the low-mounted auxiliary tank 1 is equipped with a refueling port 4 with a low installation height for convenient refueling.

[0032] A sub-tank vent 11 and a main tank vent 12 are respectively provided at the top of the low-mounted sub-tank 1 and the high-mounted main tank 2. The sub-tank vent 11 and the main tank vent 12 are connected via a refueling vent pipe 13, and space replacement can be performed to make it easier for the electric oil pump 3 to transfer oil from the low-mounted sub-tank 1 to the high-mounted main tank 2; and when the temperature in the tank is high, the fuel will continue to evaporate. By setting the refueling vent pipe 13 and cooperating with the main tank vent valve 15, it is possible to prevent the oil vapor from causing the pressure in the tank to increase rapidly.

[0033] A liquid level scale is provided on the low-mounted auxiliary oil tank 1. When the liquid level scale is 1 / 5, the output resistance of the auxiliary oil tank liquid level sensor 5 is 40 ohms; when the liquid level scale is 2 / 5, the output resistance of the auxiliary oil tank liquid level sensor 5 is 60 ohms; when the output resistance of the main oil tank liquid level sensor 8 reaches 160 ohms, the high-mounted main oil tank 2 is full of oil.

[0034] It also includes a control module, which is connected to the auxiliary tank level sensor 5, the main tank level sensor 8, and the electric fuel pump 3 through an insulating harness, and controls the working state of the electric fuel pump 3 by collecting resistance signals of the auxiliary tank level sensor 5 and the main tank level sensor 8; when the liquid level scale on the low-mounted auxiliary tank 1 is greater than 2 / 5, the output resistance of the auxiliary tank level sensor 5 collected by the control module is greater than 60 ohms and the output resistance of the main tank level sensor 8 is less than 160 ohms, and the control module controls the electric fuel pump 3 to input the fuel in the low-mounted auxiliary tank 1 into the high-mounted main tank 2; when the control module collects the output resistance of the main tank level sensor 8 reaching 160 ohms, it controls the electric fuel pump 3 to stop working; the vehicle instrument collects data from the main tank level sensor 8, and monitors the oil volume of the main tank in real time. When the driver finds the low liquid level alarm of the main tank through the instrument information, he starts to look for a nearby gas station for refueling.

[0035] The control module controls the oil delivery of the electric oil pump 3 by controlling the pulse width signal. The oil delivery of the electric oil pump 3 is synchronously adjusted by the change of the output resistance of the auxiliary oil tank level sensor 5, so that the liquid level scale of the low-mounted auxiliary oil tank 1 is between 2 / 5 and 3 / 5.

[0036] A main oil tank return oil interface 14 and a main oil tank ventilation valve 15 are provided on the top of the high main oil tank 2, and a main oil tank drain plug 16 is provided at the bottom. The main oil tank return oil interface 14 allows excess oil to flow back to the tank to reduce oil consumption; the main oil tank drain plug 16 facilitates the removal of impurities in the tank, and when refueling, the sediment is released first and then the oil is added.

[0037] The electric oil pump 3 is a diaphragm magnetic pump, which uses fuel as a conveying medium, has an insulated shell, good electromagnetic compatibility, and pulse width speed regulation.

[0038] The oil delivery hose 9, the refueling connecting pipe 10 and the refueling vent pipe 13 are rubber pipes resistant to fuel corrosion, with reliable performance and long service life.

[0039] Working principle: After arriving at the gas station, the gas station staff opens the cover of the auxiliary tank outlet 6, lifts the refueling gun and inserts it into the refueling port 4 to start refueling. When the fuel level in the auxiliary tank exceeds the 2 / 5 level scale, the control module collects the output resistance of the auxiliary tank level sensor 5 is greater than 60 ohms, and the output resistance of the main tank level sensor 8 is less than 160 ohms (that is, the level scale is lower than the full scale). At this time, the electric oil pump 3 starts to work and inputs the fuel from the auxiliary tank into the main tank. As the output resistance of the auxiliary tank level sensor 5 increases (that is, the higher the fuel level in the auxiliary tank is), the control module controls the pulse width signal of the electric oil pump 3, so that the oil delivery of the electric oil pump 3 is also greater; when the output resistance of the auxiliary tank level sensor 5 decreases, the oil delivery of the electric oil pump 3 is also reduced accordingly. In this way, the oil delivery of the electric oil pump 3 is synchronously adjusted according to the change of the output resistance of the auxiliary tank level sensor 5, so that the fuel level of the auxiliary tank is always maintained at the 2 / 5 to 3 / 5 level scale. When the main tank is full (i.e. the liquid level scale is at full scale), the control module detects that the output resistance of the main tank liquid level sensor 8 reaches 160 ohms, and the control module controls the electric fuel pump 3 to stop working, and the fuel from the auxiliary tank stops entering the main tank. At this time, the gas station staff continues to add fuel to the auxiliary tank until the auxiliary tank is full and the fuel gun jumps, and the refueling is completed. At this time, the fuel level scales of the main tank and the auxiliary tank are at full scale. As the vehicle continues to travel, it starts to consume fuel. When the fuel level in the main tank is lower than the full scale, the control module detects that the output resistance of the main tank level sensor 8 is less than 160 ohms. At the same time, the fuel level in the auxiliary tank is at the full scale. The control module detects that the output resistance of the auxiliary tank level sensor 5 is 140 ohms. At this time, the output resistance of the main and auxiliary tank level sensors 5 meet the working conditions of the electric fuel pump 3. The control module controls the electric fuel pump 3 to start working, and the fuel in the auxiliary tank starts to be input into the main tank. When the fuel level in the auxiliary tank is lower than 1 / 5 of the level scale, the control module detects that the output resistance of the main tank level sensor 8 is less than 40 ohms. The control module controls the electric fuel pump 3 to stop working, and the fuel in the auxiliary tank stops being input into the main tank.

[0040] When the driver does not want to fill up the tank, but intends to add only a certain amount or a certain quota, the high-mounted tank fuel supply system of the present invention works the same as when the tank is directly filled. When the fuel is filled to the required amount or quota, the fuel gun jumps and the refueling is finished. At this time, the electric fuel pump 3 is still working, and continues to input the fuel from the auxiliary tank into the main tank. When the fuel level in the auxiliary tank is lower than 1 / 5 of the liquid level scale, the control module collects the output resistance of the main tank liquid level sensor 8 is less than 40 ohms, and the control module controls the electric fuel pump 3 to stop working, and the fuel from the auxiliary tank stops being input into the main tank.

[0041] The specific control logic of the entire high-mounted fuel tank fuel supply system is as follows:

[0042] 1. When the output resistance of the main tank level sensor 8 is less than 160 ohms (i.e. the level scale is lower than the full scale), and the output resistance of the auxiliary tank level sensor 5 is greater than 60 ohms (i.e. the level scale is higher than 2 / 5), the electric fuel pump 3 starts to work. At the same time, as the output resistance of the auxiliary tank level sensor 5 changes (increases or decreases), the fuel delivery per unit time of the electric fuel pump 3 also changes (increases or decreases) synchronously, so that the fuel level in the auxiliary tank is always maintained between the 2 / 5 and 3 / 5 level scales.

[0043] 2. When the output resistance of the main tank liquid level sensor 8 reaches 160 ohms (i.e. the liquid level scale is at full scale) or the output resistance of the auxiliary tank liquid level sensor 5 is less than 40 ohms (i.e. the liquid level scale is less than 1 / 5), the electric oil pump 3 stops working.

[0044] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's specification and drawings or directly or indirectly applied in related technical fields are also included in the patent protection scope of the present invention.

Claims

1. A high-mounted fuel tank refueling device, characterized in that: It includes a low-mounted auxiliary fuel tank, a high-mounted main fuel tank and an electric fuel pump. The low-mounted auxiliary oil tank includes a refueling port disposed thereon, an auxiliary oil tank liquid level sensor disposed therein, and an auxiliary oil tank oil outlet disposed below a side wall thereof; A main oil tank oil inlet is provided on the top of the elevated main oil tank, and a main oil tank liquid level sensor is provided inside the main oil tank; The oil outlet of the auxiliary oil tank is connected to the oil inlet of the main oil tank through an electric oil pump, and the oil inlet of the electric oil pump is connected to the oil outlet of the auxiliary oil tank through an oil hose; the oil outlet of the electric oil pump is connected to the oil inlet of the main oil tank through a refueling connecting pipe; a liquid level scale is provided on the low-mounted auxiliary oil tank, and when the liquid level scale is 1 / 5, the output resistance of the auxiliary oil tank liquid level sensor is 40 ohms; when the liquid level scale is 2 / 5, the output resistance of the auxiliary oil tank liquid level sensor is 60 ohms; when the output resistance of the main oil tank liquid level sensor reaches 160 ohms, the high-mounted main oil tank is full of oil; and a control module is also included, which is connected to the auxiliary oil tank liquid level sensor, the main oil tank liquid level sensor and the electric oil pump through an insulating wiring harness, and collects the auxiliary oil tank liquid level sensor and the main oil tank liquid level sensor. The working state of the electric fuel pump is controlled by the resistance signal of the level sensor; when the liquid level scale on the low-mounted auxiliary fuel tank is greater than 2 / 5, the output resistance of the auxiliary fuel tank level sensor collected by the control module is greater than 60 ohms and the output resistance of the main fuel tank level sensor is less than 160 ohms, and the control module controls the electric fuel pump to input the fuel in the low-mounted auxiliary fuel tank into the high-mounted main fuel tank; when the output resistance of the main fuel tank level sensor collected by the control module reaches 160 ohms, it controls the electric fuel pump to stop working; the control module controls the fuel delivery of the electric fuel pump by controlling the pulse width signal of the electric fuel pump, and the fuel delivery of the electric fuel pump is synchronously adjusted by the change of the output resistance of the auxiliary fuel tank level sensor, so that the liquid level scale of the low-mounted auxiliary fuel tank is between 2 / 5 and 3 / 5; the refueling port is close to the side edge of the vehicle.

2. A high-mounted fuel tank refueling device according to claim 1, characterized in that: Auxiliary tank vents and main tank vents are respectively provided on the tops of the low-mounted auxiliary tank and the high-mounted main tank, and the auxiliary tank vents and the main tank vents are communicated with each other through a refueling ventilation pipe.

3. A high-mounted fuel tank refueling device according to claim 1, characterized in that: The top of the high-mounted main oil tank is provided with a main oil tank oil return interface and a main oil tank vent valve, and the bottom thereof is provided with a main oil tank oil drain screw plug.

4. A high-mounted fuel tank refueling device according to claim 3, characterized in that: The electric oil pump is a diaphragm type magnetic pump.

5. A high-mounted fuel tank refueling device according to claim 4, characterized in that: The oil delivery hose, the refueling connecting pipe and the refueling vent pipe are rubber pipes resistant to fuel oil corrosion.

Images