Methanol fuel pump lubricating system and method for full-methanol compression ignition loader
By introducing independent oil pumps and heating devices into the methanol fuel pump lubrication system of the all-methanol pressure-ignition loader, the problem of engine oil emulsification is solved, the independent operation of the lubrication system and the recycling of methanol are realized, and the reliability and life of the engine are improved.
Patent Information
- Application Number
- CN202411986073.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-04-11
AI Technical Summary
In the methanol fuel pump lubrication system of traditional loaders, the lubricating engine oil of the methanol fuel pump is easily contaminated by methanol fuel, resulting in the emulsification of the engine oil, affecting the reliability of parts and engine life.
A methanol fuel pump lubrication system for a full methanol pressure ignition loader was designed. The engine oil was extracted into the methanol fuel pump for lubrication, and the methanol was evaporated into methanol steam through a heating device, and it was recovered into the methanol fuel tank to avoid mixing the engine oil with methanol.
It effectively avoids the emulsification of engine oil in the oil pan, improves the reliability of methanol fuel pump parts, extends the engine life, and realizes the recycling of methanol.
Smart Images
Figure CN119801693A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of loaders, in particular to a methanol fuel pump lubrication system of a full methanol compression ignition loader. Background Art
[0002] Traditional loaders mainly use fuel engines as their power source, which results in large fuel consumption and serious environmental pollution. To this end, a full methanol compression ignition loader using a methanol engine has been developed. It uses methanol as fuel and has the advantages of safety, environmental protection, high efficiency, energy saving, comfort and flexibility.
[0003] Methanol engines, like existing fuel engines, require oil for lubrication. Existing methanol engines generally use the oil in the oil pan of the methanol engine to lubricate the various parts in the methanol fuel pump. However, this method will inevitably cause some unburned methanol fuel in the methanol fuel pump to penetrate into the oil pan, causing the oil in the oil pan to be contaminated and emulsified. The emulsified oil will then lubricate other parts, which will have a serious impact, reduce the reliability of the parts, and thus affect the life of the methanol engine.
[0004] In view of the above problems, it is necessary to study a methanol fuel pump lubrication system and method for a full methanol compression ignition loader, which can independently lubricate the methanol fuel pump to avoid emulsification of the engine oil in the oil pan. Summary of the invention
[0005] The object of the present invention is to provide a methanol fuel pump lubrication system and method for an all-methanol compression ignition loader, which can independently lubricate the methanol fuel pump to avoid emulsification of the engine oil in the oil pan.
[0006] In order to achieve the above object, the solution of the present invention is: A methanol fuel pump lubrication system for an all-methanol compression ignition loader comprises a vehicle controller, a methanol fuel pump, an independent oil pump, a methanol fuel tank for accommodating methanol fuel, and an independent oil tank for accommodating engine oil; an oil outlet of the independent engine oil tank is connected to an oil inlet of the independent engine oil pump, an oil outlet of the independent engine oil pump is connected to an oil inlet of the methanol fuel pump, an oil outlet of the methanol fuel pump is connected to an oil return port of the independent engine oil tank, an air outlet of the independent engine oil tank is connected to the methanol fuel tank, and a heating device electrically connected to the vehicle controller is provided in the independent engine oil tank.
[0007] The oil outlet of the independent oil pump is connected to the oil inlet of the methanol fuel pump through a pressure regulating device.
[0008] The pressure regulating device includes a tee with a pressure sensor and a pressure relief valve; the inlet of the tee is connected to the oil outlet of the independent oil pump, the first outlet of the tee is connected to the oil inlet of the methanol fuel pump, the second outlet of the tee is connected to the independent oil tank through the pressure relief valve, and the pressure sensor is electrically connected to the vehicle controller.
[0009] The independent oil tank is equipped with a liquid level sensor electrically connected to the vehicle controller.
[0010] The independent oil tank is equipped with a temperature sensor electrically connected to the vehicle controller.
[0011] The vehicle controller is electrically connected to the instrument and the engine electronic control unit.
[0012] The heating device adopts a heating wire.
[0013] The independent engine oil tank is provided with an observation window.
[0014] The methanol fuel tank is connected to the intake manifold of the methanol engine through a one-way solenoid valve.
[0015] A method for controlling a methanol fuel pump lubrication system of an all-methanol compression ignition loader as described above comprises: When the methanol engine is working, the independent oil pump draws the oil in the independent oil tank to the methanol fuel pump to lubricate the methanol fuel pump, and the lubricated oil flows back from the oil outlet of the methanol fuel pump to the oil return port of the independent oil tank; At the same time, the vehicle controller controls the operation of the heating device accordingly according to the liquid level information detected by the liquid level sensor; When the vehicle controller detects through the liquid level sensor that the liquid level in the independent engine oil tank is continuously lower than the first level threshold within the set detection time, the vehicle controller determines that the oil in the independent engine oil tank is insufficient; When the vehicle controller detects through the liquid level sensor that the liquid level in the independent engine oil tank continuously exceeds the first level threshold and is lower than the second level threshold within the set detection time, the vehicle controller determines that the oil in the independent engine oil tank is normal; When the vehicle controller detects through the liquid level sensor that the liquid level in the independent engine oil tank continuously exceeds the second level threshold and is lower than the third level threshold within the set detection time, the vehicle controller determines that the oil in the independent engine oil tank has too much mixed methanol, and the vehicle controller controls the heating device to heat the oil so that the methanol mixed in the oil forms methanol vapor and outputs it to the methanol fuel tank, until the liquid level in the independent engine oil tank is lower than the second level threshold, the vehicle controller controls the heating device to stop heating; After the heating device is heated, if the vehicle controller detects through the liquid level sensor that the liquid level in the independent oil tank has risen and the liquid level in the independent oil tank exceeds the third level threshold within the set abnormal time, the vehicle controller determines that the methanol fuel pump lubrication system of the all-methanol compression ignition loader is in an abnormal state.
[0016] After adopting the above scheme, when the methanol fuel pump lubrication system of the full methanol compression ignition loader of the present invention is working, the independent oil pump draws the oil in the independent oil tank into the methanol fuel pump to lubricate the methanol fuel pump, and the lubricated oil flows back from the oil outlet of the methanol fuel pump to the oil return port of the independent oil tank; and the heating device matched in the independent oil tank can heat the independent oil tank, so that the methanol mixed in the refluxed oil evaporates to form methanol vapor, and the methanol vapor is input into the methanol fuel tank through the air outlet of the independent oil tank to realize methanol recovery. As can be seen from the foregoing, the methanol fuel pump lubrication system of the full methanol compression ignition loader of the present invention can independently lubricate the methanol fuel pump through the oil in the independent oil tank, so that the oil in the oil pan can be avoided from being emulsified; in addition, the methanol fuel pump lubrication system of the full methanol compression ignition loader of the present invention can also heat the independent oil tank through a heating device, so that the methanol mixed in the refluxed oil evaporates to form methanol vapor and outputs it to the methanol fuel tank, which can effectively avoid the emulsification of the oil in the independent oil tank and ensure the lubrication effect of the oil in the independent oil tank. In addition, the present invention will issue corresponding instructions to the instrument and the engine electronic control unit in the event of an abnormal situation, and promptly remind the driver of the abnormal situation. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of the present invention.
[0018] Description of labels: Methanol fuel pump 1, Independent oil pump 2, Methanol fuel tank 3, one-way solenoid valve 31, Independent oil tank 4, heating device 41, liquid level sensor 42, temperature sensor 43, observation window 44, Pressure regulating device 5, three-way valve 51, pressure relief valve 52, Vehicle controller 6, Engine electronic control unit 7, Meter 8, Intake manifold 9. DETAILED DESCRIPTION
[0019] In order to further explain the technical solution of the present invention, the present invention is described in detail below through specific embodiments.
[0020] like Figure 1As shown, the present invention discloses a methanol fuel pump lubrication system of a full 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 accommodating methanol fuel, and an independent oil tank 4 for accommodating engine oil; the oil outlet of the independent engine oil tank 4 is connected to the oil inlet of the independent engine oil pump 2, the oil outlet of the independent engine oil pump 2 is connected to the engine oil inlet of the methanol fuel pump 1, the engine oil outlet of the methanol fuel pump 1 is connected to the oil return port of the independent engine oil tank 4, the air outlet of the independent engine oil tank 4 is connected to the methanol fuel tank 3, and a heating device 41 electrically connected to the vehicle controller 6 is provided in the independent engine oil tank 4, and the vehicle controller 6 controls the operation of the heating device 41.
[0021] When the methanol fuel pump lubrication system of the all-methanol compression ignition loader of the present invention is working (that is, when the methanol engine is working), the methanol engine drives the independent oil pump 2 to work synchronously, and the independent oil pump 2 draws the oil in the independent oil tank 4 to the methanol fuel pump 1 to lubricate the methanol fuel pump 1, and 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; and the heating device 41 in the independent oil tank 4 can heat the independent oil tank 4, so that the methanol mixed in the refluxed oil evaporates to form methanol vapor, and the methanol vapor is input into the methanol fuel tank 3 from the air outlet of the independent oil tank 4 to realize methanol recovery. From the foregoing, it can be seen that the methanol fuel pump lubrication system of the all-methanol compression ignition loader of the present invention can independently lubricate the methanol fuel pump 1 through the oil in the independent oil tank 4, thus avoiding the emulsification of the oil in the oil pan; in addition, the methanol fuel pump lubrication system of the all-methanol compression ignition loader of the present invention can also heat the independent oil tank 4 through the heating device 41, so that the methanol mixed in the refluxed oil evaporates to form methanol vapor and outputs it to the methanol fuel tank 3, thus effectively avoiding the emulsification of the oil in the independent oil tank 4 and ensuring the lubricating effect of the oil in the independent oil tank 4.
[0022] In an embodiment of the present invention, 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 pressure of the oil input to the methanol fuel pump 1 being too high. Specifically, the pressure regulating device 5 includes a tee 51 with a pressure sensor and a pressure relief valve 52; the inlet of the tee 51 is connected to the oil outlet of the independent oil pump 2, the first outlet of the tee 51 is connected to the oil inlet of the methanol fuel pump 1, the second outlet of the tee 51 is connected to the independent oil tank 4 through the pressure relief valve 52, and the pressure sensor of the tee 51 is electrically connected to the vehicle controller 6; the vehicle controller 6 detects the pressure of the oil output from the first outlet of the tee 51 (i.e., the pressure of the oil inlet of the methanol fuel pump 1) through the pressure sensor of the tee 51; when the pressure of the oil output from the first outlet of the tee 51 is normal, the pressure relief valve 52 is automatically closed; when the pressure of the oil output from the first outlet of the tee 51 is too high, the pressure relief valve 52 is automatically opened, so that part of the oil flows back to the independent oil tank 4, so that the pressure of the oil output from the first outlet of the tee 51 is reduced, and it is ensured that the pressure of the oil entering the methanol fuel pump 1 is not too high.
[0023] In an embodiment of the present invention, the independent engine oil tank 4 is equipped with a liquid level sensor 42 electrically connected to the vehicle controller 6. The vehicle controller 6 controls the operation of the heating device 41 accordingly according to the liquid level information detected by the liquid level sensor 42. The liquid level sensor 42 may be provided with three levels of liquid level thresholds. When the vehicle controller 6 detects through the liquid level sensor 42 that the liquid level in the independent engine oil tank 4 is continuously lower than the first level liquid level threshold within a set detection time, the vehicle controller 6 determines that the engine oil in the independent engine oil tank 4 is insufficient; when the vehicle controller 6 detects through the liquid level sensor 42 that the liquid level in the independent engine oil tank 4 is continuously higher than the first level liquid level threshold and lower than the second level liquid level threshold within a set detection time, the vehicle controller 6 determines that the engine oil in the independent engine oil tank 4 is normal; when the vehicle controller 6 detects through the liquid level sensor 42 that the liquid level in the independent engine oil tank 4 is continuously higher than the second level liquid level threshold and lower than the third level liquid level threshold within a set detection time, When the vehicle controller 6 determines that the oil in the independent oil tank 4 has a problem of too much mixed methanol, the vehicle controller 6 controls the heating device 41 to heat the oil so that the methanol mixed in the oil forms methanol vapor and outputs it to the methanol fuel tank 3, until the liquid level in the independent oil tank 4 is lower than the second level threshold value, the vehicle controller 6 controls the heating device 41 to stop heating; after the heating device 41 is heated, 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 the liquid level in the independent oil tank 4 exceeds the third level threshold value within the set abnormal time, the vehicle controller 6 determines that the methanol fuel pump lubrication system of the full methanol compression ignition loader of the present invention is in an abnormal state.
[0024] In an embodiment of the present 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 avoid insufficient or excessive heating temperature of the independent oil tank 4. The temperature sensor 43 has a maximum heating temperature threshold and a minimum heating temperature threshold. When the oil in the independent oil tank 4 has a problem of too high mixed methanol, the vehicle controller 6 controls the heating device 41 to heat. If the vehicle controller 6 detects that the temperature of the independent oil tank 4 is higher than the maximum heating temperature threshold through the temperature sensor 43, the vehicle controller 6 controls the heating device 41 to stop heating. If the vehicle controller 6 detects that the temperature of the independent oil tank 4 is lower than the minimum heating temperature threshold through the temperature sensor 43, the vehicle controller 6 controls the heating device 41 to start heating.
[0025] In the embodiment of the present invention, the heating device 41 adopts a heating wire, which has a simple structure and low cost.
[0026] In the embodiment of the present invention, 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 .
[0027] In an embodiment of the present invention, the methanol fuel tank 3 is connected to the intake manifold 9 of the methanol engine via a one-way solenoid valve 31. When the methanol engine is started, the one-way solenoid valve 31 opens to allow the methanol vapor in the methanol fuel tank 3 to be output to the intake manifold 9 of the methanol engine to participate in normal combustion.
[0028] In an embodiment of the present invention, the vehicle controller 6 can be electrically connected to the instrument 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 8, so that the instrument 8 displays the information indicating "the oil in the independent oil tank 4 is insufficient"; when the methanol fuel pump lubrication system of the full methanol compression ignition loader of the present invention is in an abnormal state, the vehicle controller 6 can send a message to the instrument 8, so that the instrument 8 displays the information indicating "the methanol fuel pump lubrication system is abnormal". At the same time, the vehicle controller 6 can also send a warning instruction to the engine electronic control unit 7, so that the engine electronic control unit 7 performs speed limit processing on the methanol engine.
[0029] The above embodiments and drawings do not limit the product form and style of the present invention. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present invention.
Claims
1. A methanol fuel pump lubrication system for an all-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 containing methanol fuel, and an independent oil tank for containing 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 air outlet of the independent oil tank is connected to the methanol fuel tank, and the independent oil tank is equipped with a heating device electrically connected to the vehicle controller.
2. The methanol fuel pump lubrication system of the all-methanol compression ignition loader according to claim 1, characterized in that: The oil outlet of the independent oil pump is connected to the oil inlet of the methanol fuel pump through a pressure regulating device.
3. The methanol fuel pump lubrication system of the all-methanol compression ignition loader according to claim 2, characterized in that: The pressure regulating device includes a tee with a pressure sensor and a pressure relief valve; the inlet of the tee is connected to the oil outlet of the independent oil pump, the first outlet of the tee is connected to the oil inlet of the methanol fuel pump, the second outlet of the tee 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 for an all-methanol compression ignition loader according to claim 1, characterized in that: The independent oil tank is equipped with a liquid level sensor electrically connected to the vehicle controller.
5. The methanol fuel pump lubrication system of the all-methanol compression ignition loader according to claim 4, characterized in that: The independent oil tank is equipped with a temperature sensor electrically connected to the vehicle controller.
6. The methanol fuel pump lubrication system for an all-methanol compression ignition loader according to claim 5, characterized in that: The vehicle controller is electrically connected to the instrument and the engine electronic control unit.
7. The methanol fuel pump lubrication system for an all-methanol compression ignition loader according to claim 1, characterized in that: The heating device adopts a heating wire.
8. The methanol fuel pump lubrication system for an all-methanol compression ignition loader according to claim 1, characterized in that: The independent oil tank is provided with an observation window.
9. The methanol fuel pump lubrication system for an all-methanol compression ignition loader according to claim 1, characterized in that: The methanol fuel tank is connected to the intake manifold of the methanol engine through a one-way solenoid valve.
10. A method for controlling a methanol fuel pump lubrication system of an all-methanol compression ignition loader as claimed in claim 4, characterized in that: include: When the methanol engine is working, the independent oil pump draws the oil in the independent oil tank to the methanol fuel pump to lubricate the methanol fuel pump, and the lubricated oil flows back from the oil outlet of the methanol fuel pump to the oil return port of the independent oil tank; At the same time, the vehicle controller controls the operation of the heating device accordingly according to the liquid level information detected by the liquid level sensor; When the vehicle controller detects through the liquid level sensor that the liquid level in the independent engine oil tank is continuously lower than the first level threshold within the set detection time, the vehicle controller determines that the oil in the independent engine oil tank is insufficient; When the vehicle controller detects through the liquid level sensor that the liquid level in the independent engine oil tank continuously exceeds the first level threshold and is lower than the second level threshold within the set detection time, the vehicle controller determines that the oil in the independent engine oil tank is normal; When the vehicle controller detects through the liquid level sensor that the liquid level in the independent engine oil tank continuously exceeds the second level threshold and is lower than the third level threshold within the set detection time, the vehicle controller determines that the oil in the independent engine oil tank has too much mixed methanol, and the vehicle controller controls the heating device to heat the oil so that the methanol mixed in the oil forms methanol vapor and outputs it to the methanol fuel tank, until the liquid level in the independent engine oil tank is lower than the second level threshold, the vehicle controller controls the heating device to stop heating; After the heating device is heated, if the vehicle controller detects through the liquid level sensor that the liquid level in the independent oil tank has risen and the liquid level in the independent oil tank exceeds the third level threshold within the set abnormal time, the vehicle controller determines that the methanol fuel pump lubrication system of the all-methanol compression ignition loader is in an abnormal state.