Hydrogen internal combustion engine lubrication system, method, program product, unit and storage medium
By using a dry oil pan and dual oil storage container design, along with solenoid valve logic switching, the oil temperature is dynamically managed, solving the problems of oil dilution and hydrogen accumulation during cold starts in hydrogen internal combustion engines, thus improving the operational reliability and safety of hydrogen internal combustion engines.
Patent Information
- Application Number
- CN202511083579.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-04
- Publication Date
- 2025-10-28
AI Technical Summary
During the cold start and warm-up phase of a hydrogen internal combustion engine, the engine oil is prone to dilution and emulsification, and hydrogen can easily accumulate, leading to the risk of detonation. Existing technologies make it difficult to effectively control the water content of the engine oil and the concentration of hydrogen in the crankcase.
It adopts a dry sump design with dual oil storage containers, combined with four solenoid valves and an oil temperature sensor to dynamically adjust the oil circulation path and temperature. It dissipates heat through a heat exchanger or bypasses the heat dissipation components to quickly heat up to evaporate water vapor and reduce hydrogen accumulation.
Effectively controlling the water content and hydrogen concentration in engine oil improves the operational reliability and safety of hydrogen internal combustion engines, ensuring the stability of the lubrication system and the efficiency of hydrogen concentration control.
Smart Images
Figure CN120845153A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of engine technology, and in particular to lubrication systems, methods, program products, units, and storage media for hydrogen internal combustion engines. Background Technology
[0002] Hydrogen internal combustion engines (engines that use hydrogen as fuel) are important equipment for hydrogen energy applications. With their outstanding advantages such as high power density, strong environmental adaptability, low requirements for hydrogen purity, low overall cost and high reliability, they have important application value in the large-scale promotion of the transportation industry.
[0003] The crankcase is a crucial component of a hydrogen internal combustion engine, primarily serving to house and protect the crankshaft and related parts. An oil pan, typically a wet oil pan, is located at the bottom of the crankcase. The wet oil pan directly serves as an oil storage container. When the engine is running, the oil pump draws oil from the wet oil pan and distributes it to various lubrication points in the engine. The lubricated oil then flows back to the wet oil pan, creating a circulation.
[0004] When a hydrogen internal combustion engine is running, water vapor produced by the combustion of hydrogen in the cylinder can easily seep into the crankcase through the piston ring seal gaps. When the oil temperature in the crankcase is low (such as during the cold start warm-up phase of a hydrogen internal combustion engine), this low-temperature environment inhibits the evaporation of water vapor in the crankcase, causing it to condense into liquid water. When this liquid water mixes with the engine oil, it can dilute or even emulsify the oil, thereby damaging the stability of the oil film on the surface of moving parts and causing lubrication failure. On the other hand, because hydrogen molecules are extremely small in diameter, hydrogen can also easily seep into the crankcase through the piston ring seal gaps, leading to an accumulation of hydrogen concentration in the crankcase and increasing the risk of detonation. Summary of the Invention
[0005] In view of the above problems, this application provides a hydrogen internal combustion engine lubrication system, method, program product, unit, and storage medium to achieve effective control of the water content and hydrogen concentration in the crankcase oil. The specific solution is as follows:
[0006] The first aspect of this application provides a hydrogen internal combustion engine lubrication system, including: a first oil storage container, a second oil storage container, a first solenoid valve, a second solenoid valve, a third solenoid valve, a fourth solenoid valve, a heat exchanger, an oil filter, an oil temperature sensor, an oil pump, and an electronic control unit.
[0007] The oil outlet of the first oil storage container is connected to the oil inlet of the fourth solenoid valve. The oil outlet of the fourth solenoid valve, the oil outlet of the second oil storage container, and the oil outlet of the dry oil sump in the hydrogen internal combustion engine are all connected to the oil inlet of the oil pump.
[0008] The oil pump outlet is connected to the oil inlet of the third solenoid valve, the oil inlet of the second oil storage container, the oil inlet of the first solenoid valve, and the oil inlet of the second solenoid valve.
[0009] The oil outlet of the third solenoid valve is connected to the oil inlet of the first oil storage container, the oil outlet of the first solenoid valve is connected to the oil inlet of the heat exchanger, and the oil outlets of the second solenoid valve and the heat exchanger are both connected to the oil inlet of the oil filter; the oil outlet of the oil filter is connected to the oil inlet of the hydrogen internal combustion engine.
[0010] The oil temperature sensor is used to measure the oil temperature at any point in the normally open oil passage of the oil circulation loop;
[0011] The electronic control unit is connected to the output terminal of the oil temperature sensor and the control terminals of the first, second, third, and fourth solenoid valves. It is used to control the first, third, and fourth solenoid valves to close and the second solenoid valve to open when the oil temperature is lower than the preset temperature; and to control the first, third, and fourth solenoid valves to open and the second solenoid valve to close when the oil temperature is not lower than the preset temperature.
[0012] In one possible implementation, the step of controlling the first, third, and fourth solenoid valves to close and the second solenoid valve to open when the engine oil temperature is lower than a preset temperature, and controlling the first, third, and fourth solenoid valves to open and the second solenoid valve to close when the engine oil temperature is not lower than the preset temperature, is replaced by:
[0013] When the oil temperature is lower than the difference between the preset temperature and the first preset value, the first, third, and fourth solenoid valves are closed, and the second solenoid valve is opened; when the oil temperature is not lower than the sum of the preset temperature and the second preset value, the first, third, and fourth solenoid valves are opened, and the second solenoid valve is closed; both the first and second preset values are greater than zero.
[0014] In one possible implementation, the preset temperature is set according to the specific location of the oil temperature sensor in the normally open oil passage.
[0015] In one possible implementation, the oil temperature sensor is located at the oil outlet of the dry sump.
[0016] In one possible implementation, the volume of the first oil storage container is greater than the volume of the second oil storage container.
[0017] In one possible implementation, both the first oil storage container and the second oil storage container adopt a tank structure.
[0018] A second aspect of this application provides a computer program product applied to an electronic control unit in a hydrogen internal combustion engine lubrication system; the hydrogen internal combustion engine lubrication system includes: a first oil storage container, a second oil storage container, a first solenoid valve, a second solenoid valve, a third solenoid valve, a fourth solenoid valve, a heat exchanger, an oil filter, an oil temperature sensor, and an oil pump; the volume of the first oil storage container is larger than the volume of the second oil storage container; the oil outlet of the first oil storage container is connected to the oil inlet of the fourth solenoid valve, and the oil outlet of the fourth solenoid valve, the oil outlet of the second oil storage container, and the dry filter in the hydrogen internal combustion engine are connected... The oil outlet of the oil pan is connected to the oil inlet of the oil pump; the oil outlet of the oil pump is connected to the oil inlet of the third solenoid valve, the oil inlet of the second oil storage container, the oil inlet of the first solenoid valve, and the oil inlet of the second solenoid valve; the oil outlet of the third solenoid valve is connected to the oil inlet of the first oil storage container; the oil outlet of the first solenoid valve is connected to the oil inlet of the heat exchanger; the oil outlets of the second solenoid valve and the heat exchanger are both connected to the oil inlet of the oil filter; the oil outlet of the oil filter is connected to the oil inlet of the hydrogen internal combustion engine; the oil temperature sensor is used to measure the oil temperature at any point in the normally open oil passage of the oil circulation loop;
[0019] The method includes: acquiring the engine oil temperature output by an oil temperature sensor; when the engine oil temperature is lower than a preset temperature, controlling the first, third, and fourth solenoid valves to close and controlling the second solenoid valve to open; when the engine oil temperature is not lower than the preset temperature, controlling the first, third, and fourth solenoid valves to open and controlling the second solenoid valve to close.
[0020] A third aspect of this application provides a computer program product including computer-readable instructions that, when executed on an electronic control unit, cause the electronic control unit to implement the hydrogen internal combustion engine lubrication system control method described in the second aspect above.
[0021] A fourth aspect of this application provides an electronic control unit, comprising at least one processor and a memory connected to the processor, wherein:
[0022] The memory is used to store computer programs;
[0023] The processor is used to execute the computer program so that the electronic control unit can implement the hydrogen internal combustion engine lubrication system control method described in the second aspect above.
[0024] The fifth aspect of this application provides a computer storage medium carrying one or more computer programs, which, when executed by an electronic control unit, enable the electronic control unit to implement the hydrogen internal combustion engine lubrication system control method described in the second aspect above.
[0025] By employing the aforementioned technical solution, this application leverages the small-volume design of the dry oil sump and the dual oil storage container design, along with the logical switching of four solenoid valves, to achieve dynamic thermal management of the engine oil temperature: when the hydrogen internal combustion engine is in hot operation, temperature control is achieved by expanding the circulation path and activating the heat exchanger; when the hydrogen internal combustion engine is in cold operation, the oil temperature is rapidly increased by shortening the circulation path, reducing the circulation volume, and bypassing the cooling components, thereby accelerating water vapor evaporation and reducing the water content of the hydrogen internal combustion engine oil. Furthermore, the smaller dry oil sump volume effectively reduces crankcase space, decreases hydrogen accumulation, reduces forced ventilation, and improves hydrogen concentration control efficiency. Attached Figure Description
[0026] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. Throughout the drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the originals and elements are not necessarily drawn to scale.
[0027] Figure 1 This application provides a schematic diagram of the structure of a hydrogen internal combustion engine lubrication system;
[0028] Figure 2 A flowchart of a control method for a hydrogen internal combustion engine lubrication system provided in this application.
[0029] Figure label:
[0030] A1 - First oil storage container; A2 - Second oil storage container; S1 - First solenoid valve; S2 - Second solenoid valve; S3 - Third solenoid valve; S4 - Fourth solenoid valve; 5 - Heat exchanger; 6 - Oil filter; 7 - Oil temperature sensor; 8 - Oil pump. Detailed Implementation
[0031] This application provides a hydrogen internal combustion engine lubrication system. By improving the hardware structure and optimizing the software design of a traditional hydrogen internal combustion engine lubrication system, it achieves effective control over the water content of the engine oil and the hydrogen concentration in the crankcase, thereby improving the operational reliability and safety of the hydrogen internal combustion engine.
[0032] The following detailed description, with reference to the accompanying drawings, illustrates a hydrogen internal combustion engine lubrication system according to an embodiment of this application. Those skilled in the art will recognize that, with technological advancements and the emergence of new scenarios, the technical solutions provided in this application are equally applicable to similar technical problems.
[0033] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms are interchangeable where appropriate; this is merely a way of distinguishing objects with the same attributes in the embodiments of this application. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion, so that a process, method, system, product, or apparatus that comprises a series of elements is not necessarily limited to those elements, but may include other elements not explicitly listed or inherent to those processes, methods, products, or apparatuses.
[0034] See Figure 1 This application provides a hydrogen internal combustion engine lubrication system, comprising: a first oil storage container A1, a second oil storage container A2, a first solenoid valve S1, a second solenoid valve S2, a third solenoid valve S3, a fourth solenoid valve S4, a heat exchanger 5, an oil filter 6, an oil temperature sensor 7, an oil pump 8, and an electronic control unit (ECU). Figure 1 (not shown in the image)
[0035] The oil outlet of the first oil storage container A1 is connected to the oil inlet of the fourth solenoid valve S4, the oil outlet of the fourth solenoid valve S4, the oil outlet of the second oil storage container A2, and the dry oil pan inside the hydrogen internal combustion engine. Figure 1 The oil outlets (not shown in the image) are all connected to the oil inlet of the oil pump 8;
[0036] The oil outlet of the oil pump 8 is connected to the oil inlet of the third solenoid valve S3, the oil inlet of the second oil storage container A2, the oil inlet of the first solenoid valve S1, and the oil inlet of the second solenoid valve S2.
[0037] The oil outlet of the third solenoid valve S3 is connected to the oil inlet of the first oil storage container A1, the oil outlet of the first solenoid valve S1 is connected to the oil inlet of the heat exchanger 5, the oil outlet of the second solenoid valve S2 and the oil outlet of the heat exchanger 5 are both connected to the oil inlet of the oil filter 6; the oil outlet of the oil filter 6 is connected to the oil inlet of the hydrogen internal combustion engine.
[0038] The oil temperature sensor 7 is used to measure the oil temperature at any position in the normally open oil passage of the oil circulation loop of the hydrogen internal combustion engine lubrication system.
[0039] The electronic control unit is connected to the output terminal of the oil temperature sensor 7 and the control terminals of the first solenoid valve S1, the second solenoid valve S2, the third solenoid valve S3, and the fourth solenoid valve S4. It is used to control the first solenoid valve S1, the third solenoid valve S3, and the fourth solenoid valve S4 to close and the second solenoid valve S2 to open when the oil temperature is lower than the preset temperature; and to control the first solenoid valve S1, the third solenoid valve S3, and the fourth solenoid valve S4 to open and the second solenoid valve S2 to close when the oil temperature is not lower than the preset temperature.
[0040] The working principle of the embodiments of this application will be described in detail below.
[0041] Engine oil pans are mainly divided into two types: wet oil pans and dry oil pans.
[0042] The wet oil pan is installed directly at the bottom of the engine crankcase and serves as an oil storage container. When the engine is running, the oil pump draws oil from the wet oil pan and outputs it to various lubrication points of the engine (such as main journals, connecting rod journals, camshafts, etc.). After lubricating the components, the oil flows back to the wet oil pan, forming a circulation.
[0043] A dry sump, on the other hand, stores engine oil in a separate oil reservoir outside the engine. The dry sump itself is small and only used for collecting oil. When the engine is running, the engine drives an external oil pump to draw oil from the oil reservoir and the dry sump and deliver it to the various lubrication points of the engine. After lubricating the components, the oil flows back to the dry sump. Then, some of the oil enters the next cycle (the amount of oil entering the next cycle depends on the engine speed), while the excess oil returns to the oil reservoir.
[0044] Compared to a wet oil sump, a dry oil sump employs an independent storage design (storing the oil in a separate oil storage container from the engine) and has a smaller volume. When the engine is a hydrogen internal combustion engine, facing the challenge of controlling the water content of the engine oil, the independent storage design of the dry oil sump, combined with solenoid valve control, allows for flexible adjustment of the oil circulation path and flow rate when the engine is cold, thereby reducing the water content. Furthermore, when the engine is a hydrogen internal combustion engine, facing the challenge of controlling hydrogen concentration, the smaller volume of the dry oil sump effectively reduces crankcase space, decreases hydrogen accumulation, and reduces forced ventilation, thus improving hydrogen concentration control efficiency. Based on this, the embodiments of this application abandon the traditional wet oil sump structure and adopt a dry oil sump structure, laying the foundation for solving the problems of controlling oil water content and hydrogen concentration in hydrogen internal combustion engines, and ensuring the operational reliability and safety of hydrogen internal combustion engines. Details are as follows:
[0045] I. Solving the problem of water content in engine oil of hydrogen internal combustion engines
[0046] To address the issue of water content in the engine oil of hydrogen internal combustion engines, this application embodiment designs the external engine oil storage container as two engine oil storage containers (a first engine oil storage container A1 and a second engine oil storage container A2; specifically, the volume of the first engine oil storage container A1 can be set to be larger than the volume of the second engine oil storage container A2, but this is not a limitation), and introduces a first solenoid valve S1, a second solenoid valve S2, a third solenoid valve S3, a fourth solenoid valve S4, and an oil temperature sensor 7.
[0047] During the operation of the hydrogen internal combustion engine, the oil temperature sensor 7 monitors the oil temperature at any location in the normally open oil passage of the oil circulation loop (i.e., the oil flow passage that remains unobstructed throughout the entire oil circulation system and is not controlled by the opening and closing of a solenoid valve, such as the oil flow passage between the oil outlet of the dry sump and the oil inlet of the oil pump 8, and the oil flow passage between the oil outlet of the oil filter 6 and the oil inlet of the hydrogen internal combustion engine). The oil in the entire oil circulation system is in a state of dynamic mixing and heat exchange. The oil in the normally open oil passage continuously exchanges and blends with the oil in the crankcase and other parts. There is a fixed correspondence between the oil temperature at any location in the normally open oil passage of the oil circulation loop and the oil temperature in the crankcase. Knowing the oil temperature at that location means knowing the oil temperature in the crankcase.
[0048] When the monitored oil temperature is not lower than the preset temperature, it can be determined that the oil in the crankcase is in a high temperature range, and the hydrogen internal combustion engine has entered hot engine operation. This high-temperature environment can significantly accelerate the evaporation of water vapor in the crankcase, greatly reducing the risk of liquid water mixing into the oil. However, excessively high oil temperature also has other drawbacks, such as accelerating oil oxidation and deterioration, accelerating the aging of sealing materials, and causing thermal expansion mismatch of moving parts. Therefore, measures should be taken to avoid excessively high oil temperature under hot engine operation. In this embodiment, when the hydrogen internal combustion engine is in hot operating condition, the first solenoid valve S1, the third solenoid valve S3, and the fourth solenoid valve S4 are opened, and the second solenoid valve S2 is closed. The corresponding oil circulation path is as follows: the hydrogen internal combustion engine drives the oil pump 8 to draw oil from the first oil storage container A1, the second oil storage container A2, and the dry sump. The oil is then transported to various lubrication points of the hydrogen internal combustion engine via the heat exchanger 5 and the oil filter 6. After lubricating the components, the oil flows back to the dry sump. Subsequently, a portion of the oil enters the next cycle, while excess oil returns to the first oil storage container A1 and the second oil storage container A2. The heat exchanger 5 is used to exchange heat with the coolant during oil circulation, thereby preventing the oil temperature from becoming too high. The oil filter 6 is used to filter out impurities such as metal shavings, dust, carbon deposits and oxidized gum that are suspended in the oil during the oil circulation process. Through the interception effect of the high-precision filter element, the cleanliness of the oil is controlled within the high-precision cleanliness standard.
[0049] When the monitored oil temperature is lower than the preset temperature, it can be determined that the oil temperature in the crankcase is low, meaning the hydrogen internal combustion engine is in a cold state. If no intervention is taken, this low-temperature environment will inhibit the evaporation of water vapor in the crankcase, causing it to condense into liquid water. When this liquid water mixes with the oil, it will dilute or even emulsify the oil, thereby damaging the stability of the oil film on the surface of moving parts and causing lubrication failure. To address this, in this embodiment, when the hydrogen internal combustion engine is in a cold state, the first solenoid valve S1, the third solenoid valve S3, and the fourth solenoid valve S4 are closed, and the second solenoid valve S2 is opened. The corresponding oil circulation path is as follows: the hydrogen internal combustion engine drives the oil pump 8 to draw oil from the second oil storage container A2 and the dry sump, then delivers it through the oil filter 6 to various lubrication points of the hydrogen internal combustion engine. After lubricating the components, the oil flows back to the dry sump, and then a portion of the oil enters the next cycle, while the excess oil returns to the second oil storage container A2.
[0050] Compared to hot engine conditions, the oil circulation path is shorter and the oil circulation volume is reduced in cold engine conditions, and it avoids heat exchanger 5. The shorter oil circulation path reduces heat dissipation along the way; the reduced oil circulation volume decreases the area of heat dispersion per unit time, allowing the frictional heat and combustion radiation heat generated by the hydrogen internal combustion engine to act more concentrated on the oil, significantly increasing the rate of oil temperature rise; and by avoiding heat exchanger 5, the amount of heat exchange between the oil and the low-temperature medium is reduced, preventing the oil heat from being carried away by the coolant in cold engine conditions. This further ensures that the oil can heat up quickly in a short time, accelerates the evaporation of water vapor in the crankcase, reduces the risk of increased water content in the oil, and ensures the stability of the hydrogen internal combustion engine lubrication system.
[0051] Furthermore, it should be noted that the aforementioned preset temperature needs to be precisely set based on the specific installation location of the temperature sensor 7. Taking the temperature sensor 7 installed at the oil outlet of a dry oil pan as an example, in a certain scenario, based on the thermal coupling characteristics between the oil temperature at this location and the oil temperature in the crankcase, the preset temperature is calibrated to 70℃ through thermodynamic simulation and bench testing. If the installation location of the temperature sensor 7 changes, such as moving it to the oil inlet of a hydrogen internal combustion engine or other key monitoring points, considering the different thermal coupling characteristics between the oil temperature at different locations and the oil temperature in the crankcase, the corresponding preset temperature also needs to be adjusted accordingly to ensure that the temperature threshold accurately matches the oil thermal management requirements.
[0052] For temperature sensor 7, a platinum resistance temperature sensor is recommended, which has advantages such as high-precision temperature measurement, strong high-temperature resistance, excellent hydrogen resistance and high reliability.
[0053] II. Solving the Problem of Hydrogen Concentration Control in Hydrogen Internal Combustion Engines
[0054] Due to the small molecular size and high permeability of hydrogen, controlling the hydrogen concentration in the crankcase of a hydrogen internal combustion engine is a critical technical indicator related to equipment safety. Current mainstream solutions employ a forced-ventilation crankcase system. Its technical logic is as follows: a dynamic oil-gas separator extracts hydrogen-containing blow-by gas from the crankcase, and high-pressure fresh air from the turbocharger outlet is pumped into the crankcase, thus achieving the dual goals of forced ventilation and hydrogen concentration dilution. A dry sump, with its significantly smaller volume than a wet sump, reduces the internal space of the crankcase, thereby decreasing the amount of blow-by gas extracted and the amount of fresh air introduced. This reduces the overall forced ventilation volume while effectively improving the dynamic control efficiency of hydrogen concentration within the crankcase. Therefore, this design utilizes the principle of volume optimization to construct a technical logic chain of "space reduction - reduced ventilation - improved control efficiency," ensuring the safe operation of the hydrogen internal combustion engine.
[0055] In summary, this application's embodiments, relying on the small-volume design of the dry oil sump and the dual oil storage container design, combined with the logical switching of four solenoid valves, achieve dynamic thermal management of the engine oil temperature: when the hydrogen internal combustion engine is in hot operation, heat dissipation and temperature control are achieved by expanding the circulation path and activating the heat exchanger; when the hydrogen internal combustion engine is in cold operation, the oil temperature is rapidly increased by shortening the circulation path, reducing the circulation volume, and bypassing the heat dissipation components to accelerate water vapor evaporation and reduce the water content of the hydrogen internal combustion engine oil. Furthermore, the smaller volume of the dry oil sump effectively reduces crankcase space, decreases hydrogen accumulation, reduces forced ventilation, and improves hydrogen concentration control efficiency. Therefore, this application's embodiments ensure the operational reliability and safety of the hydrogen internal combustion engine.
[0056] It should be noted that the first oil storage container A1 and the second oil storage container A2 can adopt a tank structure, but are not limited to it. Specifically, the axisymmetric structure of the tank can evenly distribute stress, effectively resist vibration and temperature fluctuations, and significantly reduce the risk of stress concentration compared to irregular structures; moreover, the sealing design of the tank structure meets professional specifications, and the oil's oxidation resistance and impermeability are guaranteed through multiple sealing processes, with sealing reliability far superior to traditional box-type structures; in addition, the tank structure has a mature manufacturing process and high material utilization rate, which facilitates large-scale production and has obvious cost advantages. These comprehensive advantages make the tank the preferred solution for oil storage.
[0057] In one possible implementation, to avoid frequent switching of the first solenoid valve S1, the second solenoid valve S2, the third solenoid valve S3, and the fourth solenoid valve S4 due to frequent fluctuations in the measured oil temperature, a hysteresis control strategy can be introduced into the control logic of the electronic control unit. Specifically, a first preset value ΔT1 and a second preset value ΔT2 are pre-set, both slightly greater than zero (ΔT1 and ΔT2 can be equal). When the detected oil temperature is less than the preset temperature - ΔT1, the first solenoid valve S1, the third solenoid valve S3, and the fourth solenoid valve S4 are closed, and the second solenoid valve S2 is opened. When the detected oil temperature is greater than or equal to the preset temperature + ΔT2, the first solenoid valve S1, the third solenoid valve S3, and the fourth solenoid valve S4 are opened, and the second solenoid valve S2 is closed. Thus, small fluctuations are eliminated through a temperature buffer zone (a temperature range with a lower boundary of preset temperature - ΔT1 and an upper boundary of preset temperature + ΔT2, based on the preset temperature).
[0058] In addition, corresponding to the above system embodiments, this application also provides a control method for a hydrogen internal combustion engine lubrication system, applied to an electronic control unit in the hydrogen internal combustion engine lubrication system. The hydrogen internal combustion engine lubrication system further includes: a first oil storage container A1, a second oil storage container A2, a first solenoid valve S1, a second solenoid valve S2, a third solenoid valve S3, a fourth solenoid valve S4, a heat exchanger 5, an oil filter 6, an oil temperature sensor 7, and an oil pump 8; the volume of the first oil storage container A1 is larger than the volume of the second oil storage container A2; the oil outlet of the first oil storage container A1 is connected to the oil inlet of the fourth solenoid valve S4, and the oil outlets of the fourth solenoid valve S4, the second oil storage container A2, and the dry sump in the hydrogen internal combustion engine are all connected to the oil inlet of the oil pump 8; the oil pump... The oil outlet of valve 8 is connected to the oil inlet of the third solenoid valve S3, the oil inlet of the second oil storage container A2, the oil inlet of the first solenoid valve S1, and the oil inlet of the second solenoid valve S2; the oil outlet of the third solenoid valve S3 is connected to the oil inlet of the first oil storage container A1, the oil outlet of the first solenoid valve S1 is connected to the oil inlet of the heat exchanger 5, and the oil outlets of the second solenoid valve S2 and the heat exchanger 5 are both connected to the oil inlet of the oil filter 6; the oil outlet of the oil filter 6 is connected to the oil inlet of the hydrogen internal combustion engine; the oil temperature sensor 7 is used to measure the oil temperature at any position in the normally open oil passage of the oil circulation loop of the hydrogen internal combustion engine lubrication system. See also... Figure 2 The method includes:
[0059] Step S01: Obtain the engine oil temperature output by the oil temperature sensor 7, and then proceed to step S02.
[0060] Step S02: Determine whether the oil temperature is lower than the preset temperature. If yes, proceed to step S03; otherwise, proceed to step S04.
[0061] Step S03: Control the first solenoid valve S1, the third solenoid valve S3 and the fourth solenoid valve S4 to close, and control the second solenoid valve S2 to open, then return to step S01.
[0062] Step S04: Control the first solenoid valve S1, the third solenoid valve S3 and the fourth solenoid valve S4 to open, and control the second solenoid valve S2 to close, then return to step S01.
[0063] certainly, Figure 2 The method shown can also incorporate a hysteresis control strategy, namely: a first preset value ΔT1 and a second preset value ΔT2 are preset, both of which are slightly greater than zero (ΔT1 and ΔT2 can be equal); when the oil temperature is detected to be < preset temperature - ΔT1, the first solenoid valve S1, the third solenoid valve S3 and the fourth solenoid valve S4 are closed, and the second solenoid valve S2 is opened; when the oil temperature is detected to be ≥ preset temperature + ΔT2, the first solenoid valve S1, the third solenoid valve S3 and the fourth solenoid valve S4 are opened, and the second solenoid valve S2 is closed.
[0064] Furthermore, this application also provides a computer program product, including computer-readable instructions, which, when executed on an electronic control unit, cause the electronic control unit to implement any of the hydrogen internal combustion engine lubrication system control methods provided in this application.
[0065] This application embodiment also provides an electronic control unit, including at least one processor and a memory connected to the processor, wherein:
[0066] The memory is used to store computer programs;
[0067] The processor is used to execute the computer program so that the electronic control unit can implement any of the hydrogen internal combustion engine lubrication system control methods provided in the embodiments of this application.
[0068] This application also provides a computer-readable storage medium carrying one or more computer programs. When the one or more computer programs are executed by an electronic control unit, the electronic control unit can implement any of the hydrogen internal combustion engine lubrication system control methods provided in this application.
[0069] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the embodiments of this application. Therefore, the embodiments of this application are not to be limited to the embodiments shown herein, but are to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A lubrication system for a hydrogen internal combustion engine, characterized in that, include: The system comprises a first oil storage container (A1), a second oil storage container (A2), a first solenoid valve (S1), a second solenoid valve (S2), a third solenoid valve (S3), a fourth solenoid valve (S4), a heat exchanger (5), an oil filter (6), an oil temperature sensor (7), an oil pump (8), and an electronic control unit. The oil outlet of the first oil storage container (A1) is connected to the oil inlet of the fourth solenoid valve (S4). The oil outlet of the fourth solenoid valve (S4), the oil outlet of the second oil storage container (A2), and the oil outlet of the dry oil pan in the hydrogen internal combustion engine are all connected to the oil inlet of the oil pump (8). The oil outlet of the oil pump (8) is connected to the oil inlet of the third solenoid valve (S3), the oil inlet of the second oil storage container (A2), the oil inlet of the first solenoid valve (S1), and the oil inlet of the second solenoid valve (S2). The oil outlet of the third solenoid valve (S3) is connected to the oil inlet of the first oil storage container (A1), the oil outlet of the first solenoid valve (S1) is connected to the oil inlet of the heat exchanger (5), the oil outlet of the second solenoid valve (S2) and the oil outlet of the heat exchanger (5) are both connected to the oil inlet of the oil filter (6); the oil outlet of the oil filter (6) is connected to the oil inlet of the hydrogen internal combustion engine. The oil temperature sensor (7) is used to measure the oil temperature at any position in the normally open oil passage of the oil circulation loop; The electronic control unit is connected to the output terminal of the oil temperature sensor (7) and the control terminals of the first solenoid valve (S1), the second solenoid valve (S2), the third solenoid valve (S3), and the fourth solenoid valve (S4). When the oil temperature is lower than the preset temperature, it controls the first solenoid valve (S1), the third solenoid valve (S3), and the fourth solenoid valve (S4) to close and controls the second solenoid valve (S2) to open; when the oil temperature is not lower than the preset temperature, it controls the first solenoid valve (S1), the third solenoid valve (S3), and the fourth solenoid valve (S4) to open and controls the second solenoid valve (S2) to close.
2. The hydrogen internal combustion engine lubrication system according to claim 1, characterized in that, The original command, which states that when the engine oil temperature is lower than a preset temperature, controls the first solenoid valve (S1), the third solenoid valve (S3), and the fourth solenoid valve (S4) to close and controls the second solenoid valve (S2) to open; and the command, which states that when the engine oil temperature is not lower than the preset temperature, controls the first solenoid valve (S1), the third solenoid valve (S3), and the fourth solenoid valve (S4) to open and controls the second solenoid valve (S2) to close, is replaced by: When the oil temperature is lower than the difference between the preset temperature and the first preset value, the first solenoid valve (S1), the third solenoid valve (S3), and the fourth solenoid valve (S4) are controlled to close, and the second solenoid valve (S2) is controlled to open; when the oil temperature is not lower than the sum of the preset temperature and the second preset value, the first solenoid valve (S1), the third solenoid valve (S3), and the fourth solenoid valve (S4) are controlled to open, and the second solenoid valve (S2) is controlled to close; both the first preset value and the second preset value are greater than zero.
3. The hydrogen internal combustion engine lubrication system according to claim 1 or 2, characterized in that, The preset temperature is set according to the specific location of the oil temperature sensor (7) in the normally open oil passage.
4. The hydrogen internal combustion engine lubrication system according to claim 1 or 2, characterized in that, The oil temperature sensor (7) is located at the oil outlet of the dry oil pan.
5. The hydrogen internal combustion engine lubrication system according to claim 1 or 2, characterized in that, The volume of the first oil storage container (A1) is greater than the volume of the second oil storage container (A2).
6. The hydrogen internal combustion engine lubrication system according to claim 1 or 2, characterized in that, Both the first oil storage container (A1) and the second oil storage container (A2) adopt a tank structure.
7. A control method for a hydrogen internal combustion engine lubrication system, characterized in that, An electronic control unit is applied to the lubrication system of a hydrogen internal combustion engine; the lubrication system includes: a first oil storage container (A1), a second oil storage container (A2), a first solenoid valve (S1), a second solenoid valve (S2), a third solenoid valve (S3), a fourth solenoid valve (S4), a heat exchanger (5), an oil filter (6), an oil temperature sensor (7), and an oil pump (8); the volume of the first oil storage container (A1) is larger than the volume of the second oil storage container (A2); the oil outlet of the first oil storage container (A1) is connected to the oil inlet of the fourth solenoid valve (S4), and the oil outlets of the fourth solenoid valve (S4), the second oil storage container (A2), and the dry sump in the hydrogen internal combustion engine are connected. All ports are connected to the oil inlet of the oil pump (8); the oil outlet of the oil pump (8) is connected to the oil inlet of the third solenoid valve (S3), the oil inlet of the second oil storage container (A2), the oil inlet of the first solenoid valve (S1), and the oil inlet of the second solenoid valve (S2); the oil outlet of the third solenoid valve (S3) is connected to the oil inlet of the first oil storage container (A1), the oil outlet of the first solenoid valve (S1) is connected to the oil inlet of the heat exchanger (5), the oil outlet of the second solenoid valve (S2) and the oil outlet of the heat exchanger (5) are both connected to the oil inlet of the oil filter (6); the oil outlet of the oil filter (6) is connected to the oil inlet of the hydrogen internal combustion engine; the oil temperature sensor (7) is used to measure the oil temperature at any position in the normally open oil passage of the oil circulation loop; The method includes: acquiring the engine oil temperature output by the oil temperature sensor (7); when the engine oil temperature is lower than a preset temperature, controlling the first solenoid valve (S1), the third solenoid valve (S3), and the fourth solenoid valve (S4) to close, and controlling the second solenoid valve (S2) to open; when the engine oil temperature is not lower than the preset temperature, controlling the first solenoid valve (S1), the third solenoid valve (S3), and the fourth solenoid valve (S4) to open, and controlling the second solenoid valve (S2) to close.
8. A computer program product, characterized in that, It includes computer-readable instructions that, when executed on an electronic control unit, cause the electronic control unit to implement the hydrogen internal combustion engine lubrication system control method as described in claim 7.
9. An electronic control unit, characterized in that, It includes at least one processor and a memory connected to the processor, wherein: The memory is used to store computer programs; The processor is used to execute the computer program so that the electronic control unit can implement the hydrogen internal combustion engine lubrication system control method as described in claim 7.
10. A computer storage medium, characterized in that, The storage medium carries one or more computer programs that, when executed by the electronic control unit, enable the electronic control unit to implement the hydrogen internal combustion engine lubrication system control method as described in claim 7.