Vehicle methanol series connection supply system
Through the automotive methanol series supply system, the contradiction between the range and space layout of methanol vehicles is solved, efficient fuel utilization and safety improvement is achieved, and the overall competitiveness of methanol vehicles is enhanced.
Patent Information
- Application Number
- CN202510408787.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-02
- Publication Date
- 2025-07-11
AI Technical Summary
When existing methanol cars meet the battery life requirements of more than 800km, the traditional chassis layout is difficult to take into account the reasonable arrangement of large-volume alcohol boxes, powertrains, cooling systems and other components, resulting in insufficient space utilization, increased vehicle weight, and the alcohol box connection structure is prone to fatigue and cracking, and methanol and gasoline are prone to volatilization to produce unconventional emission problems of harmful gases.
The methanol series supply system for automotive use is adopted, including a main alcohol box, a sub-alcohol box and a gasoline tank integrated composite box. The solution is isolated by a partition, and the main alcohol box and the top of the sub-alcohol box are connected in series to achieve dynamic balance of methanol level. Combined with the methanol and gasoline steam recovery design, active desorption is adopted to simplify the structure and reduce fuel consumption.
It improves the vehicle space utilization rate and working conditions adaptability, reduces fuel consumption, solves the problem of harmful gas emissions, achieves maintenance-free throughout the life cycle, and enhances the competitiveness and scope of application of methanol vehicles.
Smart Images
Figure CN120291997A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a vehicle methanol series supply system, belonging to the technical field of commercial vehicles. Background Art
[0002] Driven by the "dual carbon" strategic goal, the commercial vehicle industry is accelerating its transformation towards low carbonization. As a hydrogen-rich and oxygen-containing fuel, methanol has the advantages of clean combustion, convenient storage and transportation, and wide raw material sources. Its carbon emissions throughout the life cycle are lower than those of traditional gasoline or diesel, and it has gradually become the focus of research on alternative fuels for heavy vehicles. However, the low calorific value characteristic of methanol fuel leads to a significant increase in fuel consumption under the same cruising range, and it is urgent to achieve a practical breakthrough in methanol vehicles through technological innovation.
[0003] Currently, there is a contradiction between the cruising range and the space layout of methanol vehicles. For example, to meet the cruising range requirement of over 800 km for existing models, the volume of the methanol tank needs to reach over 1200 L. However, the traditional chassis layout is difficult to balance the reasonable arrangement of large-volume methanol tanks with components such as the powertrain and cooling system, resulting in insufficient space utilization and an increase in vehicle weight. If the volume of the methanol tank is increased, it is easy to cause the longitudinal passing angle of the vehicle to drop below 18°, affecting the passing ability on unpaved roads. At the same time, the connection structure between the methanol tank and the vehicle frame is prone to stress concentration under complex working conditions, posing a risk of fatigue cracking. Summary of the Invention
[0004] To solve the above technical problems, the present invention proposes a vehicle methanol series supply system, and the specific technical solution is as follows:
[0005] A vehicle methanol series supply system includes a main methanol tank and a methanol-gasoline composite tank. The methanol-gasoline composite tank is provided with a secondary methanol tank and a gasoline tank. The main methanol tank and the secondary methanol tank are connected in series to the engine methanol inlet of the vehicle through a first connection device. The gasoline tank is connected to the engine gasoline inlet of the vehicle through a second connection device. The fuel vapors in the main methanol tank, secondary methanol tank, and gasoline tank are connected to the engine intake port of the vehicle through a third connection device.
[0006] Preferably, the first connection device includes a first three-way pipe, a methanol pump, and a methanol filter connected by a methanol pipe. Two inlets of the first three-way pipe are respectively connected to the main methanol tank and the secondary methanol tank through methanol pipes. The outlet of the first three-way pipe is connected to the methanol pump, and a methanol filter is provided between the methanol pump and the engine methanol inlet.
[0007] Furthermore, a methanol pressure limiting valve is provided between the methanol pump and the methanol filter. The inlet of the methanol pressure limiting valve is connected to the methanol pump, and the outlet of the methanol pressure limiting valve is respectively connected to the methanol filter and a second three-way pipe. The outlet of the second three-way pipe is respectively connected to the main methanol tank and the secondary methanol tank through methanol pipes.
[0008] Preferably, the second connection device includes a fuel pump and a fuel filter connected by a fuel pipe. The fuel pump is connected to a fuel tank through a fuel pipe. The outlet of the fuel pump is connected to the fuel filter, and the outlet of the fuel filter is connected to the engine fuel port.
[0009] Furthermore, a fuel pressure limiting valve is provided between the fuel pump and the fuel filter. The inlet of the fuel pressure limiting valve is connected to the fuel pump, and the outlet of the fuel pressure limiting valve is respectively connected to the fuel filter and the fuel tank.
[0010] Preferably, the third connection device includes a third three-way pipe, a fourth three-way pipe, a carbon canister, and a one-way valve connected by a ventilation pipeline. The inlet of the third three-way pipe is respectively connected to a secondary alcohol tank and a fuel tank. The inlet of the fourth three-way pipe is respectively connected to the outlet of the third three-way pipe and a main alcohol tank. The outlet of the fourth three-way pipe is connected to the carbon canister. The outlet of the carbon canister is connected to the one-way valve, and the outlet of the one-way valve is connected to the engine intake port.
[0011] Preferably, the main alcohol tank, the secondary alcohol tank, and the fuel tank are respectively provided with a first filling port, a second filling port, and a third filling port.
[0012] Preferably, the methanol-gasoline composite tank is an integrated structure of the secondary alcohol tank and the fuel tank in one piece, with a partition in the middle.
[0013] In order to increase the layout space of the alcohol tank as much as possible, the present invention adopts a methanol-gasoline composite tank and separates the two solutions through a partition. Compared with the layout method of an independent fuel tank, the space gap requirement is further compressed; the series structure at the top of the main alcohol tank and the secondary alcohol tank realizes the simultaneous liquid extraction of the methanol tanks on both sides of the vehicle frame, and increases the ground clearance between axles, improving the adaptability of the whole vehicle to working conditions. Through the dynamic balance of the methanol liquid level, one methanol liquid level sensor can be saved, simplifying the overall structure and thus improving the reliability. Through the design of methanol and gasoline vapor recovery, the present invention solves the problem of unconventional emissions of harmful gases easily volatilized from methanol and gasoline, improves the safety of the whole vehicle while reducing fuel consumption, and the present invention adopts an active desorption method to achieve the effect of maintenance-free throughout the life cycle, enhancing the overall competitiveness and application scope of methanol vehicles, which is beneficial to the development of methanol vehicles. Description of the Drawings
[0014] Figure 1 is a schematic diagram of the principle of a vehicle-mounted methanol series supply system of the present invention.
[0015] Figure 2 is a schematic diagram of the layout structure of a vehicle-mounted methanol series supply system of the present invention.
[0016] In the figure: 1, main alcohol tank; 2, first filling port; 3, first three-way pipe; 4, methanol pump; 5, second three-way pipe; 6, methanol pressure limiting valve; 7, methanol filter; 8, methanol pipe; 9, fourth three-way pipe; 10, carbon canister; 11, one-way valve; 12, ventilation pipe; 13, methanol-gasoline composite tank; 14, second filling port; 15, third three-way pipe; 16, third filling port; 17, gasoline pump; 18, gasoline pressure limiting valve; 19, gasoline filter; 20, gasoline pipe; 21, auxiliary alcohol tank; 22, gasoline tank; 23, engine alcohol inlet; 24, engine air inlet; 25, engine gasoline inlet. Detailed implementation manners
[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0018] As Figure 1 and 2 shown, a vehicle methanol series supply system includes a main alcohol tank and a methanol-gasoline composite tank 13. The methanol-gasoline composite tank 13 is an integrated structure integrating an auxiliary alcohol tank 21 and a gasoline tank 22, with a partition in the middle. The main alcohol tank 1 and the auxiliary alcohol tank 21 are connected in series to the engine alcohol inlet 23 of the vehicle through a first connection device to provide methanol fuel for the whole vehicle. The gasoline tank 22 is connected to the engine gasoline inlet 25 of the vehicle through a second connection device to provide gasoline fuel for the whole vehicle. The fuel vapors in the main alcohol tank 1, the auxiliary alcohol tank 21, and the gasoline tank 22 are connected to the engine air inlet 24 of the vehicle through a third connection device to desorb the methanol and gasoline vapors adsorbed in the carbon canister 10 and at the same time provide methanol and gasoline vapors to the engine. The main alcohol tank 1, the auxiliary alcohol tank 21, and the gasoline tank 22 are respectively provided with a first filling port 2, a second filling port 14, and a third filling port 16. The main alcohol tank 1, the auxiliary alcohol tank 21, and the first connection device constitute a methanol supply system, the gasoline tank 22 and the second connection device constitute a gasoline supply system, and the main alcohol tank 1, the auxiliary alcohol tank 21, the gasoline tank 22, and the third connection device constitute a methanol-gasoline vapor recovery system.
[0019] The first connection device includes a first three-way pipe 3, a methanol pump 4, and a methanol filter 7 connected through a methanol pipe 8. The two inlets of the first three-way pipe 3 are respectively connected to the main alcohol tank 1 and the auxiliary alcohol tank 21 through methanol pipes 8. The outlet of the first three-way pipe 3 is connected to the methanol pump 4, and a methanol filter 7 is provided between the methanol pump 4 and the engine alcohol inlet 23.
[0020] As another embodiment, a methanol pressure limiting valve 6 is provided between the methanol pump 4 and the methanol filter 7. The inlet of the methanol pressure limiting valve 6 is connected to the methanol pump 4, and the outlet of the methanol pressure limiting valve 6 is respectively connected to the methanol filter 7 and the second tee 5. The outlets of the second tee 5 are respectively connected to the main methanol tank 1 and the auxiliary methanol tank 21 through methanol pipes 8.
[0021] When the vehicle is working, the methanol pump 4 sucks methanol fuel into the main methanol tank 1 and the auxiliary methanol tank 21 simultaneously through the first tee 3. When the methanol liquid levels in the main methanol tank 1 and the auxiliary methanol tank 21 are inconsistent, the static pressure difference between the methanol tank with a higher liquid level and the liquid outlet is relatively large, and the methanol fuel in the methanol tank with a higher liquid level will be sucked out preferentially. The excess methanol is returned to the main methanol tank 1 and the auxiliary methanol tank 21 through the second tee 5 by the methanol pressure limiting valve 6 according to the actual demand. When the methanol liquid levels in the main methanol tank 1 and the auxiliary methanol tank 21 are inconsistent, the liquid static pressure of the methanol tank with a lower liquid level is smaller, and the methanol preferentially flows back to the methanol tank with a lower liquid level; the methanol fuel then flows into the engine methanol inlet 23 through the methanol filter 7 for the normal operation of the engine. Since the main methanol tank 1 and the auxiliary methanol tank 21 are connected in series at the top, the main methanol tank 1 and the auxiliary methanol tank 21 need to have methanol (with different liquid levels) simultaneously to ensure the effectiveness of the methanol suction by the methanol pump 4. The liquid level height preferentially sucks the solution in the methanol tank with a higher liquid level when the methanol pump 4 sucks methanol, and the methanol pressure limiting valve 6 preferentially returns the methanol to the methanol tank with a lower liquid level during the methanol return process, and is dynamically adjusted to the same liquid level according to the pressure difference brought by the liquid level heights of the two methanol tanks.
[0022] The second connection device includes a gasoline pump 17 and a gasoline filter 19 connected by a gasoline pipe 20. The gasoline pump 17 is connected to a gasoline tank 22 through the gasoline pipe 20. The outlet of the gasoline pump 17 is connected to the gasoline filter 19, and the outlet of the gasoline filter 19 is connected to an engine gasoline port 25.
[0023] As another embodiment, a gasoline pressure limiting valve 18 is provided between the gasoline pump 17 and the gasoline filter 19. The inlet of the gasoline pressure limiting valve 18 is connected to the gasoline pump 17, and the outlet of the gasoline pressure limiting valve 18 is respectively connected to the gasoline filter 19 and the gasoline tank 22.
[0024] When the vehicle is in a low-temperature environment, the engine needs to burn gasoline to heat the engine circulating water. The gasoline pump 17 pumps out gasoline fuel from the gasoline tank 22. After passing through the gasoline pressure limiting valve 18, the excess gasoline returns to the gasoline tank 22 through the return oil path of the gasoline pressure limiting valve 18, and the remaining gasoline passes through the gasoline filter 19 and the gasoline pipe 20 and enters the engine gasoline port 25.
[0025] The third connecting device includes a third three-way pipe 15, a fourth three-way pipe 9, a carbon canister 10 and a check valve 111 connected through a ventilation pipeline 12. The inlet of the third three-way pipe 15 is respectively connected to a secondary alcohol tank 21 and a gasoline tank 22. The inlet of the fourth three-way pipe 9 is respectively connected to the outlet of the third three-way pipe 15 and a primary alcohol tank 1. The outlet of the fourth three-way pipe 9 is connected to the carbon canister 10. The outlet of the carbon canister 10 is connected to the check valve 11. The outlet of the check valve 11 is connected to an engine air inlet 24.
[0026] Methanol and gasoline are volatile and have pollution characteristics. The third three-way pipe 15 and the fourth three-way pipe 9 are used to connect three-way evaporation gases to the carbon canister 10. The carbon canister 10 adsorbs methanol and gasoline evaporation gases, and then is connected to the engine air inlet 24 through a check valve 11. The check valve 11 prevents the backflow of engine gases. Through the negative pressure adsorption of the carbon canister 10 by the engine intake air, the evaporation gases in the carbon canister 10 are desorbed, thus realizing the long-term effectiveness of the carbon canister.
[0027] In order to increase the layout space of the alcohol tank as much as possible, the present invention adopts a methanol-gasoline composite tank, and separates the two solutions through a partition. Compared with the layout method of an independent gasoline tank, the space gap requirement is further compressed. The series structure of the top of the primary alcohol tank and the secondary alcohol tank realizes the simultaneous liquid extraction of the methanol tanks on both sides of the vehicle frame, and increases the ground clearance between axles, improving the adaptability of the whole vehicle to working conditions. Through the dynamic balance of the methanol liquid level, a methanol liquid level sensor can be saved, simplifying the overall structure and thus improving the reliability. Through the design of methanol and gasoline vapor recovery, the present invention solves the problem of unconventional emissions of harmful gases caused by the easy volatility of methanol and gasoline, improves the safety of the whole vehicle while reducing fuel consumption, and adopts an active desorption method to achieve the effect of maintenance-free throughout the life cycle, improving the overall competitiveness and application scope of methanol vehicles, and being beneficial to the development of methanol vehicles.
[0028] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A vehicle-mounted methanol series supply system, characterized in that, It includes a main alcohol tank and a methanol-gasoline composite tank. The methanol-gasoline composite tank is provided with a secondary methanol tank and a gasoline tank. The main alcohol tank and the secondary alcohol tank are connected in series to the engine alcohol inlet of the vehicle through a first connecting device. The gasoline tank is connected to the engine gasoline inlet of the vehicle through a second connecting device. The fuel vapors in the main alcohol tank, the secondary alcohol tank and the gasoline tank are connected to the engine air inlet of the vehicle through a third connecting device.
2. The vehicle methanol series supply system according to claim 1, wherein, The first connecting device includes a first three-way pipe, a methanol pump and a methanol filter connected through a methanol pipe. The two inlets of the first three-way pipe are respectively connected to the main alcohol tank and the secondary alcohol tank through methanol pipes. The outlet of the first three-way pipe is connected to the methanol pump. A methanol filter is provided between the methanol pump and the engine alcohol inlet.
3. The vehicle-mounted methanol series supply system according to claim 2, wherein, A methanol pressure limiting valve is provided between the methanol pump and the methanol filter. The inlet of the methanol pressure limiting valve is connected to the methanol pump. The outlet of the methanol pressure limiting valve is respectively connected to the methanol filter and a second three-way pipe. The outlet of the second three-way pipe is respectively connected to the main alcohol tank and the secondary alcohol tank through methanol pipes.
4. A vehicle methanol series supply system according to claim 1, characterized in that, The second connecting device includes a gasoline pump and a gasoline filter connected through a gasoline pipe. The gasoline pump is connected to the gasoline tank through a gasoline pipe. The outlet of the gasoline pump is connected to the gasoline filter. The outlet of the gasoline filter is connected to the engine gasoline inlet.
5. The vehicle methanol series supply system according to claim 4, characterized in that, A gasoline pressure limiting valve is provided between the gasoline pump and the gasoline filter. The inlet of the gasoline pressure limiting valve is connected to the gasoline pump. The outlet of the gasoline pressure limiting valve is respectively connected to the gasoline filter and the gasoline tank.
6. The vehicle methanol series supply system according to claim 1, characterized in that, The third connecting device includes a third three-way pipe, a fourth three-way pipe, a carbon canister and a check valve connected through a ventilation pipeline. The inlets of the third three-way pipe are respectively connected to the secondary alcohol tank and the gasoline tank. The inlets of the fourth three-way pipe are respectively connected to the outlets of the third three-way pipe and the main alcohol tank. The outlet of the fourth three-way pipe is connected to the carbon canister. The outlet of the carbon canister is connected to the check valve. The outlet of the check valve is connected to the engine air inlet.
7. A vehicle methanol series supply system according to claim 1, characterized in that, The main alcohol tank, the secondary alcohol tank and the gasoline tank are respectively provided with a first filling port, a second filling port and a third filling port.
8. A vehicle methanol series supply system according to claim 1, characterized in that, The methanol-gasoline composite tank is an integrated structure integrating the secondary alcohol tank and the gasoline tank, with a partition in the middle.