Methanol fuel pump lubricating system of full methanol compression ignition loader
By combining an independent oil pump and a heating device, the problem of oil emulsification in methanol engines is solved, enabling effective lubrication of the methanol fuel pump and methanol recovery, thereby improving engine reliability and lifespan.
Patent Information
- Application Number
- CN202423303906.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-12-31
AI Technical Summary
In existing methanol engines, the lubrication system of the methanol fuel pump can cause oil emulsification, affecting the reliability of components and the lifespan of the engine.
It employs an independent oil pump and heating device, lubricates the methanol fuel pump through an independent oil tank, and recovers evaporated methanol to avoid oil emulsification.
It effectively avoids oil emulsification, ensures the lubrication effect of the oil, and reduces environmental pollution by recovering methanol vapor, thereby improving the reliability and lifespan of the engine.
Smart Images
Figure CN223482792U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of loaders, and in particular to a methanol fuel pump lubrication system for a full methanol compression ignition loader. Background Technology
[0002] Traditional loaders primarily use internal combustion engines as their power source, resulting in significant fuel consumption and environmental pollution. To address this, some researchers have developed methanol compression-ignition loaders using methanol engines. These loaders utilize methanol as fuel and offer advantages such as safety, environmental friendliness, high efficiency, energy saving, comfort, and maneuverability.
[0003] Like existing gasoline engines, methanol engines require engine oil for lubrication. Currently, methanol engines typically use engine oil in the engine's oil pan to lubricate the components within the methanol fuel pump. However, this method inevitably results in some unburned methanol fuel from the fuel pump seeping into the oil pan, contaminating the oil and causing it to emulsify. When this emulsified oil then lubricates other components, it can have serious consequences, reducing component reliability and ultimately impacting the lifespan of the methanol engine.
[0004] In view of the above problems, it is necessary to study a methanol fuel pump lubrication system for a full methanol compression ignition loader that can independently lubricate the methanol fuel pump and avoid emulsification of the engine oil in the oil pan. Utility Model Content
[0005] The purpose of this invention is to provide a methanol fuel pump lubrication system for a methanol compression ignition loader, which can independently lubricate the methanol fuel pump and avoid emulsification of the engine oil in the oil pan.
[0006] To achieve the above objectives, the solution of this utility model is:
[0007] A methanol fuel pump lubrication system for a methanol compression ignition loader includes a vehicle controller, a methanol fuel pump, an independent oil pump, a methanol fuel tank for holding methanol fuel, and an independent oil tank for holding engine oil. The oil outlet of the independent oil tank is connected to the oil inlet of the independent oil pump, the oil outlet of the independent oil pump is connected to the oil inlet of the methanol fuel pump, the oil outlet of the methanol fuel pump is connected to the oil return port of the independent oil tank, and the vent of the independent oil tank is connected to the methanol fuel tank. A heating device electrically connected to the vehicle controller is installed in the independent oil tank.
[0008] The oil outlet of the independent oil pump is connected to the oil inlet of the methanol fuel pump via a pressure regulating device.
[0009] The pressure regulating device includes a three-way valve with a pressure sensor and a pressure relief valve; the inlet of the three-way valve is connected to the oil outlet of an independent oil pump, the first outlet of the three-way valve is connected to the oil inlet of a methanol fuel pump, and the second outlet of the three-way valve is connected to an independent oil tank through the pressure relief valve. The opening and closing of the pressure relief valve is controlled by the pressure sensor of the three-way valve.
[0010] The independent oil tank is equipped with a level sensor that is electrically connected to the vehicle controller.
[0011] The independent oil tank is equipped with a temperature sensor that is electrically connected to the vehicle controller.
[0012] The vehicle controller is electrically connected to the instrument.
[0013] The vehicle controller is electrically connected to the engine electronic control unit.
[0014] The heating device uses a heating wire.
[0015] The independent oil tank is equipped with an observation window.
[0016] The methanol fuel tank is connected to the intake manifold of the methanol engine via a one-way solenoid valve.
[0017] After adopting the above scheme, when the methanol fuel pump lubrication system of the all-methanol compression ignition loader of this utility model is working, the independent oil pump draws oil from the independent oil tank to the methanol fuel pump to lubricate the methanol fuel pump. The lubricated oil flows back from the oil outlet of the methanol fuel pump to the oil return port of the independent oil tank. The heating device in the independent oil tank can heat the independent oil tank, so that the methanol mixed in the returning oil evaporates to form methanol vapor. The methanol vapor is input into the methanol fuel tank through the gas outlet of the independent oil tank to realize methanol recovery. As described above, the methanol fuel pump lubrication system of this all-methanol compression ignition loader can independently lubricate the methanol fuel pump using oil from a separate oil tank, thus avoiding oil emulsification in the oil pan. Furthermore, the system can also heat the separate oil tank via a heating device, causing the methanol mixed in the returning oil to evaporate into methanol vapor, which is then output to the methanol fuel tank. This effectively prevents oil emulsification in the separate oil tank, ensuring its lubrication effect. Moreover, this invention will issue corresponding commands to the instrument panel and engine electronic control unit in case of abnormal conditions, promptly alerting the driver. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the present invention.
[0019] Label Explanation:
[0020] Methanol fuel pump 1,
[0021] Independent oil pump 2,
[0022] Methanol fuel tank 3, one-way solenoid valve 31,
[0023] Independent oil tank 4, heating device 41, level sensor 42, temperature sensor 43, observation window 44.
[0024] Pressure regulating device 5, tee 51, pressure relief valve 52
[0025] Vehicle controller 6,
[0026] Engine electronic control unit 7,
[0027] Instrument 8,
[0028] Intake manifold 9. Detailed Implementation
[0029] To further explain the technical solution of this utility model, the following detailed description is provided through specific embodiments.
[0030] like Figure 1 As shown, this utility model discloses a methanol fuel pump lubrication system for a methanol compression ignition loader, which includes a vehicle controller 6, a methanol fuel pump 1, an independent oil pump 2, a methanol fuel tank 3 for holding methanol fuel, and an independent oil tank 4 for holding engine oil. The oil outlet of the independent oil tank 4 is connected to the oil inlet of the independent oil pump 2, the oil outlet of the independent oil pump 2 is connected to the oil inlet of the methanol fuel pump 1, the oil outlet of the methanol fuel pump 1 is connected to the oil return port of the independent oil tank 4, and the air outlet of the independent oil tank 4 is connected to the methanol fuel tank 3. A heating device 41 electrically connected to the vehicle controller 6 is installed in the independent oil tank 4, and the vehicle controller 6 controls the operation of the heating device 41.
[0031] When the methanol fuel pump lubrication system of the all-methanol compression ignition loader of this utility model is working (i.e. when the methanol engine is working), the methanol engine drives the independent oil pump 2 to work synchronously. The independent oil pump 2 draws oil from the independent oil tank 4 to the methanol fuel pump 1 to lubricate the methanol fuel pump 1. The lubricated oil flows back from the oil outlet of the methanol fuel pump 1 to the oil return port of the independent oil tank 4. The heating device 41 in the independent oil tank 4 can heat the independent oil tank 4, so that the methanol mixed in the returning oil evaporates to form methanol vapor. The methanol vapor is input into the methanol fuel tank 3 through the gas outlet of the independent oil tank 4 to realize methanol recovery. As described above, the methanol fuel pump lubrication system of the all-methanol compression ignition loader of this invention can independently lubricate the methanol fuel pump 1 through the oil in the independent oil tank 4, thus avoiding emulsification of the oil in the oil pan. In addition, the methanol fuel pump lubrication system of the all-methanol compression ignition loader of this invention can also heat the independent oil tank 4 through the heating device 41, so that the methanol mixed in the returning oil evaporates to form methanol vapor and is output to the methanol fuel tank 3. This can effectively prevent the oil in the independent oil tank 4 from emulsifying and ensure the lubrication effect of the oil in the independent oil tank 4.
[0032] In an embodiment of this utility model, the oil outlet of the independent oil pump 2 is connected to the oil inlet of the methanol fuel pump 1 through a pressure regulating device 5; the pressure regulating device 5 is used to regulate the pressure of the oil input to the methanol fuel pump 1 to avoid the oil pressure input to the methanol fuel pump 1 being too high. Specifically, the pressure regulating device 5 includes a three-way valve 51 with a pressure sensor and a pressure relief valve 52. The inlet of the three-way valve 51 is connected to the outlet of the independent oil pump 2, the first outlet of the three-way valve 51 is connected to the oil inlet of the methanol fuel pump 1, and the second outlet of the three-way valve 51 is connected to the independent oil tank 4 through the pressure relief valve 52. The pressure sensor of the three-way valve 51 is electrically connected to the vehicle controller 6. The vehicle controller 6 uses the pressure sensor of the three-way valve 51 to detect the pressure of the oil output from the first outlet of the three-way valve 51 (i.e., the pressure of the oil inlet of the methanol fuel pump 1). When the pressure of the oil output from the first outlet of the three-way valve 51 is normal, the pressure relief valve 52 automatically closes. When the pressure of the oil output from the first outlet of the three-way valve 51 is too high, the pressure relief valve 52 automatically opens, causing some oil to flow back to the independent oil tank 4, thereby reducing the pressure of the oil output from the first outlet of the three-way valve 51 and ensuring that the pressure of the oil entering the methanol fuel pump 1 is not too high.
[0033] In an embodiment of this utility model, the independent oil tank 4 is equipped with a level sensor 42 electrically connected to the vehicle controller 6. The vehicle controller 6 controls the heating device 41 to operate according to the level information detected by the level sensor 42. The level sensor 42 can be set with three level thresholds. When the vehicle controller 6 detects through the level sensor 42 that the level in the independent oil tank 4 is continuously lower than the first level threshold for a set detection time, the vehicle controller 6 determines that the oil in the independent oil tank 4 is insufficient. When the vehicle controller 6 detects through the level sensor 42 that the level in the independent oil tank 4 is continuously higher than the first level threshold and lower than the second level threshold for a set detection time, the vehicle controller 6 determines that the oil in the independent oil tank 4 is normal. When the vehicle controller 6 detects through the level sensor 42 that the level in the independent oil tank 4 is continuously higher than the second level threshold and lower than the third level threshold for a set detection time, the vehicle controller 6 determines that the oil in the independent oil tank 4 is normal. The vehicle controller 6 determines that there is an excessive amount of methanol mixed in the oil in the independent oil tank 4. The vehicle controller 6 controls the heating device 41 to heat the oil, causing the methanol mixed in the oil to form methanol vapor and be output to the methanol fuel tank 3. The heating device 41 stops heating when the liquid level in the independent oil tank 4 is lower than the second level threshold. After the heating device 41 has started heating, if the vehicle controller 6 detects through the liquid level sensor 42 that the liquid level in the independent oil tank 4 has risen and exceeds the third level threshold within a set abnormal time, the vehicle controller 6 determines that the methanol fuel pump lubrication system of the all-methanol compression ignition loader of this utility model is in an abnormal state.
[0034] In this embodiment of the invention, the independent oil tank 4 is equipped with a temperature sensor 43 electrically connected to the vehicle controller 6. The vehicle controller 6 detects the temperature in the independent oil tank 4 through the temperature sensor 43 and controls the heating device 41 accordingly to prevent insufficient or excessive heating of the independent oil tank 4. The temperature sensor 43 has a maximum heating temperature threshold and a minimum heating temperature threshold. When there is an excessive amount of methanol mixed in the oil in the independent oil tank 4, the vehicle controller 6 controls the heating device 41 to heat the oil. If the vehicle controller 6 detects through the temperature sensor 43 that the temperature of the independent oil tank 4 is higher than the maximum heating temperature threshold, the vehicle controller 6 controls the heating device 41 to stop heating. Conversely, if the vehicle controller 6 detects through the temperature sensor 43 that the temperature of the independent oil tank 4 is lower than the minimum heating temperature threshold, the vehicle controller 6 controls the heating device 41 to start heating.
[0035] In the embodiments of this utility model, the heating device 41 uses a heating wire, which has a simple structure and low cost.
[0036] In an embodiment of this utility model, the independent oil tank 4 is provided with an observation window 44 so as to directly observe the liquid level in the independent oil tank 4.
[0037] In an embodiment of this utility model, the methanol fuel tank 3 is connected to the intake manifold 9 of the methanol engine via a one-way solenoid valve 31. After the methanol engine starts, the one-way solenoid valve 31 opens, allowing methanol vapor from the methanol fuel tank 3 to be output into the intake manifold 9 of the methanol engine for normal combustion.
[0038] In an embodiment of this utility model, the vehicle controller 6 can be electrically connected to the instrument panel 8 and the engine electronic control unit 7. When the oil in the independent oil tank 4 is insufficient, the vehicle controller 6 can send a message to the instrument panel 8, causing the instrument panel 8 to display the message "Insufficient oil in the independent oil tank 4". When the methanol fuel pump lubrication system of the methanol compression ignition loader of this utility model is in an abnormal state, the vehicle controller 6 can send a message to the instrument panel 8, causing the instrument panel 8 to display the message "Methanol fuel pump lubrication system abnormal". At the same time, the vehicle controller 6 can also issue a warning command to the engine electronic control unit 7, causing the engine electronic control unit 7 to limit the speed of the methanol engine.
[0039] The above embodiments and figures are not intended to limit the product form and style of this utility model. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of this utility model.
Claims
1. A methanol fuel pump lubrication system for a methanol compression ignition loader, characterized in that: It includes a vehicle controller, a methanol fuel pump, an independent oil pump, a methanol fuel tank for holding methanol fuel, and an independent oil tank for holding engine oil. The oil outlet of the independent oil tank is connected to the oil inlet of the independent oil pump, the oil outlet of the independent oil pump is connected to the oil inlet of the methanol fuel pump, the oil outlet of the methanol fuel pump is connected to the oil return port of the independent oil tank, the vent of the independent oil tank is connected to the methanol fuel tank, and a heating device electrically connected to the vehicle controller is installed in the independent oil tank.
2. The methanol fuel pump lubrication system of the all-methanol compression ignition loader as described in claim 1, characterized in that: The oil outlet of the independent oil pump is connected to the oil inlet of the methanol fuel pump via a pressure regulating device.
3. The methanol fuel pump lubrication system of the all-methanol compression ignition loader as described in claim 2, characterized in that: The pressure regulating device includes a three-way valve with a pressure sensor and a pressure relief valve; the inlet of the three-way valve is connected to the oil outlet of the independent oil pump, the first outlet of the three-way valve is connected to the oil inlet of the methanol fuel pump, the second outlet of the three-way valve is connected to the independent oil tank through the pressure relief valve, and the pressure sensor is electrically connected to the vehicle controller.
4. The methanol fuel pump lubrication system of the all-methanol compression ignition loader as described in claim 1, characterized in that: The independent oil tank is equipped with a level sensor that is electrically connected to the vehicle controller.
5. The methanol fuel pump lubrication system of the all-methanol compression ignition loader as described in claim 4, characterized in that: The independent oil tank is equipped with a temperature sensor that is electrically connected to the vehicle controller.
6. The methanol fuel pump lubrication system of the all-methanol compression ignition loader as described in claim 4, characterized in that: The vehicle controller is electrically connected to the instrument panel.
7. The methanol fuel pump lubrication system of the all-methanol compression ignition loader as described in claim 4, characterized in that: The vehicle controller is electrically connected to the engine electronic control unit.
8. The methanol fuel pump lubrication system of the all-methanol compression ignition loader as described in claim 1, characterized in that: The heating device uses a heating wire.
9. The methanol fuel pump lubrication system of the all-methanol compression ignition loader as described in claim 1, characterized in that: The independent oil tank is equipped with an observation window.
10. The methanol fuel pump lubrication system of the all-methanol compression ignition loader as described in claim 1, characterized in that: The methanol fuel tank is connected to the intake manifold of the methanol engine via a one-way solenoid valve.