Internal combustion engine anti-corrosion method and related device

Abstract

The invention discloses an internal combustion engine anti-corrosion method and a related device, and relates to the field of internal combustion engines, and the method comprises the following steps: when the internal combustion engine is in a flameout state, obtaining the gas moisture content of a crankcase, if the gas moisture content of the crankcase is not less than the moisture content upper limit threshold value, outputting the obtained compressed dry air into a cylinder and the crankcase at the same time to form double-path air supply, in the double-path air supply process, original air in the air cylinder and the crankcase is pumped out, and air flow is formed. According to the invention, the gas with high moisture content in the crankcase and the cylinder and easy to cause the corrosion of the internal combustion engine is replaced by the compressed dry air, that is, the internal combustion engine is subjected to air exchange, so that the moisture content of the gas in the internal combustion engine is kept at a lower level, and the risk of corrosion of all parts in the internal combustion engine can be greatly reduced; therefore, the service life of the internal combustion engine is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of internal combustion engines, and more particularly to an internal combustion engine anti-corrosion method and related devices. Background Art

[0002] Internal combustion engines typically contain water vapor in their fuel combustion products, resulting in a certain moisture content in their exhaust. The exhaust pipe of an internal combustion engine experiences a temperature drop. When the exhaust gas passes through the pipe and its temperature drops below a certain level, the water in the exhaust gas condenses. This high moisture content can affect various engine components (such as the cylinder, exhaust system, and crankcase), increasing the risk of corrosion and affecting the engine's operating condition and service life. Summary of the Invention

[0003] In view of this, the present invention discloses a method and related device for preventing rust of an internal combustion engine, so as to keep the water content of the gas inside the internal combustion engine at a low level, thereby significantly reducing the risk of rust on various components in the internal combustion engine, keeping the internal combustion engine in a good working condition, and thus extending the service life of the internal combustion engine.

[0004] A method for preventing rust in an internal combustion engine, comprising:

[0005] When the internal combustion engine is in a flameout state, the water content of the crankcase gas is obtained;

[0006] If the crankcase gas moisture content is not less than the moisture content upper limit threshold, the obtained compressed dry air is output to the cylinder and the crankcase simultaneously, forming a dual-path air supply;

[0007] During the dual-path gas replenishment process, the original gas in the cylinder and the crankcase is extracted to form a gas flow.

[0008] Optionally, it also includes:

[0009] If the crankcase gas moisture content is less than the moisture content upper threshold and not less than the moisture content lower threshold, outputting the obtained compressed dry air into the crankcase to form a single-path air supply, wherein the moisture content lower threshold is less than the moisture content upper threshold;

[0010] During the single-path gas replenishment process, the original gas in the cylinder and the crankcase is extracted to form a gas flow.

[0011] Optionally, it also includes:

[0012] If the crankcase gas moisture content is less than a moisture content lower threshold, it is determined that the internal combustion engine is at a low corrosion risk, and the internal combustion engine is controlled to be powered off.

[0013] Optionally, if the crankcase gas moisture content is not less than an upper moisture content threshold, the obtained compressed dry air is simultaneously output to the cylinder and the crankcase to form a dual-path air supply, including:

[0014] If the crankcase gas moisture content is not less than the moisture content upper limit threshold, starting the air compressor to obtain compressed air;

[0015] When the compressed air meets the set drying condition, the injector fuel switching valve is controlled to close the fuel supply channel and open the compressed air channel, and the crankcase solenoid valve is controlled to open at the same time;

[0016] The compressed air is used as the compressed dry air and is outputted into the crankcase through the crankcase solenoid valve. At the same time, the compressed dry air is outputted into the cylinder through the ejector, forming a dual-path air supply.

[0017] Optionally, the process of determining whether the compressed air meets the set drying condition includes:

[0018] If the gas moisture content of the compressed air is less than the moisture content lower limit threshold, it is determined that the compressed air meets the set drying condition;

[0019] If the gas moisture content of the compressed air is not less than the moisture content lower limit threshold, the compressed air is input into a drying box for drying, so that the compression control after drying satisfies the set drying condition.

[0020] Optionally, if the moisture content of the crankcase gas is less than the moisture content upper threshold and not less than the moisture content lower threshold, outputting the obtained compressed dry air into the crankcase to form a single-path air supply, including:

[0021] If the crankcase gas moisture content is less than the moisture content upper limit threshold and not less than the moisture content lower limit threshold, starting the air compressor to obtain compressed air;

[0022] When the compressed air meets the set drying conditions, the crankcase solenoid valve is controlled to open;

[0023] The compressed air is used as the compressed dry air and outputted into the crankcase through the crankcase solenoid valve, forming a single-circuit air supply.

[0024] Optionally, when the internal combustion engine is in a flameout state, obtaining the crankcase gas moisture content includes:

[0025] When the internal combustion engine is in a flameout state, the crankcase gas moisture content detected by a gas moisture content sensor is obtained, where the gas moisture content sensor is disposed in the crankcase or the cylinder.

[0026] An internal combustion engine anti-corrosion device, comprising:

[0027] a water content acquisition unit, for acquiring the water content of the crankcase gas when the internal combustion engine is in a flameout state;

[0028] A dual-path air supply unit is used to output the obtained compressed dry air to the cylinder and the crankcase simultaneously if the moisture content of the crankcase gas is not less than the upper moisture content threshold, thereby forming a dual-path air supply;

[0029] The first air extraction unit is used to extract the original gas in the cylinder and the crankcase during the dual-path air supply process to form a gas flow.

[0030] A computer storage medium stores at least one instruction, wherein when the at least one instruction is executed by a processor, any internal combustion engine corrosion prevention method is implemented.

[0031] An electronic device, comprising: a memory and a processor;

[0032] The memory is used to store at least one instruction;

[0033] The processor is configured to execute the at least one instruction to implement any internal combustion engine corrosion prevention method.

[0034] As can be seen from the above technical solutions, the present invention discloses a method for preventing rust in an internal combustion engine and a related device. When the internal combustion engine is in a flameout state, the moisture content of the crankcase gas is obtained. If the moisture content of the crankcase gas is not less than the upper threshold value of the moisture content, the obtained compressed dry air is simultaneously output to the cylinder and the crankcase to form a dual-path air supply. During the dual-path air supply process, the original gas in the cylinder and the crankcase is extracted to form a gas flow. The present invention replaces the gas in the crankcase and the cylinder with a high moisture content that is prone to cause rust in the internal combustion engine with compressed dry air, that is, by ventilating the internal combustion engine, the moisture content of the gas inside the internal combustion engine is maintained at a low level, thereby significantly reducing the risk of rust on various components in the internal combustion engine, keeping the internal combustion engine in a good working state, and thus extending the service life of the internal combustion engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the disclosed drawings without any creative work.

[0036] Figure 1 Disclosed are curves showing the variation of water content in exhaust gas from internal combustion engines fueled by three different fuels: hydrogen, natural gas, and diesel.

[0037] Figure 2 This is a flow chart of a method for preventing rust in an internal combustion engine disclosed in an embodiment of the present invention;

[0038] Figure 3 A flow chart of another internal combustion engine corrosion prevention method disclosed in an embodiment of the present invention;

[0039] Figure 4 A flowchart of a method for preventing rust in an internal combustion engine according to a specific example disclosed in an embodiment of the present invention;

[0040] Figure 5 This is a schematic structural diagram of an internal combustion engine anti-corrosion device disclosed in an embodiment of the present invention;

[0041] Figure 6 The figure is a schematic structural diagram of an electronic device disclosed in an embodiment of the present invention. DETAILED DESCRIPTION

[0042] The internal combustion engine anti-corrosion method disclosed in the present application is applicable to all internal combustion engines, such as diesel internal combustion engines, natural gas internal combustion engines, methanol internal combustion engines, hydrogen internal combustion engines, etc.

[0043] Among them, the hydrogen internal combustion engine is an internal combustion engine that uses hydrogen as fuel. As a clean energy carrier, hydrogen has a wide range of flammable concentrations and fast flame propagation characteristics, which enable it to achieve higher energy utilization efficiency. Since hydrogen only produces water (H2O) and nitrogen oxides (NO x ) emissions, therefore, hydrogen internal combustion engines have the potential to have cleaner emissions than other internal combustion engines.

[0044] Explanation of related terms

[0045] Excess air coefficient: also known as the "excess air coefficient," "excess air coefficient," or commonly as the "excess air coefficient." It refers to the ratio of the actual amount of air supplied for fuel combustion to the theoretical amount of air. It is a key parameter reflecting the fuel-air ratio and is often represented by the symbol "λ." In an internal combustion engine's combustion chamber, to ensure the most complete combustion of the fuel possible, the actual amount of air supplied must always exceed the theoretical amount (this excess is called "excess air"). In other words, the excess air coefficient must be greater than 1. However, combustion theory and operational experience indicate that a λ that is too large or too small (indicating excessive or insufficient air supply) is detrimental to combustion. Consequently, different combustion equipment has its own optimal excess air coefficient value.

[0046] Currently, the molecular formula for engine fuels is simplified to CxHyOz. The chemical equation for complete combustion of fuel in the cylinder is: CxHyOz + (x + 0.25y - 0.5z)O2 → xCO2 + 0.5yH2O. The water content of exhaust gas from internal combustion engines after burning different fuels varies with the excess air coefficient λ.

[0047] See also Figure 1 The published curves of water content in exhaust gas of internal combustion engines using three different fuels, hydrogen, natural gas and diesel, as a function of λ, show that Figure 1 It can be seen that the exhaust gas of internal combustion engines using three different fuels, hydrogen, natural gas, and diesel, all have a certain water content. Therefore, the various components within the internal combustion engine are affected by the high water content and are at a higher risk of rust. Especially in working environments with high air humidity, core components such as cylinder liners, piston rings, exhaust pipes, and superchargers are prone to severe rust, which affects the working condition and service life of the internal combustion engine. In particular, the water content of the exhaust gas of hydrogen internal combustion engines is significantly higher than that of other fuels. The high water content of the gas in hydrogen internal combustion engines causes the various components of the hydrogen internal combustion engine to be affected by the high water content, resulting in a higher risk of rust, which in turn affects the working condition and service life of the hydrogen internal combustion engine.

[0048] The source of the internal combustion engine's anti-corrosion problem comes from the high water content of the engine's exhaust gas. Reducing the moisture in the crankcase gas helps reduce the risk of rust in many parts of the engine, such as the cylinder and exhaust system.

[0049] To solve the problems existing in the related art, an embodiment of the present invention discloses a method for preventing rust in an internal combustion engine. When the internal combustion engine is in an off state, the moisture content of the crankcase gas is obtained. If the moisture content of the crankcase gas is not less than the moisture content upper limit threshold, the obtained compressed dry air is simultaneously output to the cylinder and the crankcase, forming a dual-path air supply. During the dual-path air supply process, the original gas in the cylinder and the crankcase is extracted to form a gas flow. The present invention replaces the gas in the crankcase and the cylinder with a high moisture content that is likely to cause rust in the internal combustion engine with compressed dry air, that is, by ventilating the internal combustion engine, the moisture content of the gas inside the internal combustion engine is maintained at a low level, thereby significantly reducing the risk of rust on various components in the internal combustion engine, keeping the internal combustion engine in a good working condition, and thus extending the service life of the internal combustion engine.

[0050] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0051] See also Figure 2 , a flow chart of a method for preventing corrosion of an internal combustion engine disclosed in an embodiment of the present invention, the method comprising:

[0052] Step S101: When the internal combustion engine is in a flameout state, the water content of the crankcase gas is obtained.

[0053] The crankcase is part of an internal combustion engine. It drives the engine by converting the gas pressure generated in the combustion chamber into rotational power, which is connected to the piston through a connecting rod.

[0054] When a normally operating internal combustion engine receives a stop command, it first cuts off the fuel supply valve and stops fuel injection. Then, as the engine rail pressure continues to decrease, the fuel injection valve cannot open and the injection action in the cylinder cannot be completed, causing the internal combustion engine to automatically shut down. At this time, the fuel in the supply pipeline is consumed to prevent the risk of fuel leakage later.

[0055] The present application obtains the crankcase gas moisture content detected by the gas moisture sensor when the internal combustion engine is in the off state. In practical applications, the gas moisture sensor can be set in the crankcase or the cylinder. Since the pressure and temperature in the crankcase are relatively low compared to those in the cylinder, it helps to increase the life of the gas moisture sensor. Therefore, the gas moisture sensor is preferably set in the crankcase. Of course, in addition to being set in the crankcase and the cylinder, the gas moisture sensor can also be set in other locations of the internal combustion engine, for example, in the exhaust tail pipe, exhaust manifold, supercharger volute, etc. of the exhaust system. The specific setting location can be determined according to actual needs.

[0056] Step S102: If the moisture content of the crankcase gas is not less than the upper moisture content threshold, the obtained compressed dry air is output to the cylinder and the crankcase simultaneously, forming a dual-path air supply.

[0057] The value of the upper threshold value β of the water content is related to the materials and anti-rust coating of different components in the internal combustion engine, and can be obtained through reliability tests. For example, the value of the upper threshold value β of the water content is 6%.

[0058] Specifically, if the water content of the crankcase gas is not less than the upper water content threshold, the air compressor is started to obtain compressed air.

[0059] When the compressed air meets the set dryness condition, the injector fuel switching valve is controlled to close the fuel supply passage and open the compressed air passage, and the crankcase solenoid valve is controlled to open.

[0060] The compressed air is used as compressed dry air and output to the crankcase through the crankcase solenoid valve. At the same time, the compressed dry air is output to the cylinder through the ejector, forming a dual-path air supply.

[0061] If the crankcase gas moisture content ω ≥ β, it indicates that the gas moisture content in the internal combustion engine is high, and the risk of rusting the various components within the internal combustion engine is high, so the internal combustion engine needs to be ventilated. When the compressed air meets the set dryness conditions, the compressed air is determined to be compressed dry air. For example, if the gas moisture content of the compressed air is less than α, the compressed air is determined to be compressed dry air. At this time, the injector fuel switching valve is controlled to close the fuel supply channel and open the compressed air channel. In other words, the passage between the fuel and the injector is closed, causing the injector to stop injecting fuel into the cylinder. At the same time, the compressed air channel between the air compressor and the injector is opened, allowing the injector to inject compressed dry air into the cylinder, thereby replenishing the compressed dry gas into the cylinder.

[0062] At the same time, after the crankcase solenoid valve is opened, compressed dry air can directly enter the crankcase through the opened crankcase solenoid valve, thereby replenishing compressed dry gas to the crankcase.

[0063] It can be seen from this that the present application forms a dual-path air supply by simultaneously supplying compressed dry gas to the cylinder and the crankcase.

[0064] The value of the water content lower limit threshold α is related to the materials and anti-rust coatings of different components in the internal combustion engine, and can be obtained through reliability tests. For example, the value of the water content lower limit threshold α is 3%.

[0065] Step S103: During the dual-path gas supply process, the original gas in the cylinder and the crankcase is extracted to form a gas flow.

[0066] During the dual-path air supply process, that is, the process of simultaneously supplying compressed dry gas to the cylinder and crankcase, the ventilation pump extracts the original gas in the cylinder and crankcase through the exhaust pipe, thereby forming a gas flow, and replacing the gas in the crankcase and cylinder with a high water content that is prone to cause rust of the internal combustion engine with compressed dry air, thereby achieving ventilation of the internal combustion engine and reducing the risk of rust in the internal combustion engine.

[0067] In order to enable the ventilation pump to quickly extract the original gas in the cylinder and crankcase, in actual application, the ventilation pump can be operated at high power to quickly extract the original gas in the cylinder and crankcase, thereby achieving rapid ventilation of the internal combustion engine.

[0068] Among them, during the ventilation process of the internal combustion engine, it is also necessary to obtain the crankcase gas moisture content in real time until the crankcase gas moisture content is less than the moisture content upper limit threshold, and the dual-path air replenishment process is stopped.

[0069] In summary, the present invention discloses a method for preventing rust in an internal combustion engine. When the internal combustion engine is in a flameout state, the moisture content of the crankcase gas is obtained. If the moisture content of the crankcase gas is not less than the upper moisture content threshold, the obtained compressed dry air is simultaneously output to the cylinder and the crankcase, forming a dual-path air supply. During the dual-path air supply process, the original gas in the cylinder and the crankcase is extracted to form a gas flow. The present invention replaces the gas in the crankcase and the cylinder with a high moisture content that is likely to cause rust in the internal combustion engine with compressed dry air, that is, by ventilating the internal combustion engine, the moisture content of the gas inside the internal combustion engine is maintained at a low level, thereby significantly reducing the risk of rusting of various components in the internal combustion engine, keeping the internal combustion engine in a good working state, and thus extending the service life of the internal combustion engine.

[0070] In one embodiment, the process of determining whether the compressed air meets the set drying conditions includes:

[0071] If the gas moisture content of the compressed air is less than the lower moisture content threshold, it is determined that the compressed air meets the set drying conditions;

[0072] If the gas moisture content of the compressed air is not less than the moisture content lower limit threshold, the compressed air is input into the drying box for drying so that the compression control after drying meets the set drying conditions.

[0073] In this application, after the air compressor outputs compressed air, a humidity sensor can be used to obtain the moisture content of the compressed air. If the moisture content of the compressed air is less than the lower moisture content threshold α, it indicates that the moisture content of the compressed air is at a low level. In this case, the risk of the compressed air causing corrosion of various components in the internal combustion engine is low. Therefore, if the compressed air with a moisture content less than the lower moisture content threshold α meets the set dryness condition, the compressed air can be used as compressed dry air.

[0074] If the gas moisture content of the compressed air is not less than the lower moisture content threshold α, it indicates that the gas moisture content of the compressed air is at a high level. At this time, the risk of the compressed air causing corrosion of various components in the internal combustion engine is high. Therefore, the compressed air needs to be input into a drying oven for drying until the gas moisture content of the compressed air is less than the lower moisture content threshold α.

[0075] In one embodiment, see Figure 3 , another flow chart of the internal combustion engine anti-corrosion method disclosed in the embodiment of the present invention, Figure 2 Based on the embodiment shown, after step S101, the following steps may also be included:

[0076] Step S104 : If the moisture content of the crankcase gas is less than the moisture content upper threshold and not less than the moisture content lower threshold, the obtained compressed dry air is output to the crankcase to form a single-path air supply.

[0077] The lower limit threshold value α of the moisture content is smaller than the upper limit threshold value β of the moisture content.

[0078] Specifically, if the water content of the crankcase gas is less than the water content upper limit threshold and not less than the water content lower limit threshold, the air compressor is started to obtain compressed air.

[0079] When the compressed air meets the set drying conditions, the crankcase solenoid valve is controlled to open.

[0080] The compressed air is used as the compressed dry air and outputted into the crankcase through the crankcase solenoid valve, forming a single-circuit air supply.

[0081] When α≤crankcase gas moisture contentω<β, it indicates that the gas moisture content in the internal combustion engine is relatively high, and there is a risk of rust in the various components of the internal combustion engine. Therefore, the internal combustion engine needs to be ventilated. When the compressed air meets the set dryness conditions, the compressed air is determined to be compressed dry air. For example, if the gas moisture content of the compressed air is less than α, the compressed air is determined to be compressed dry air. At this time, the injector remains in the state of injecting fuel into the cylinder, ensuring that the mixture concentration and combustion efficiency in the combustion chamber are not affected by the air supply operation, so that the engine's power, torque and other performance parameters are maintained at the original level. Only the crankcase solenoid valve is controlled to open, so that compressed dry air can directly enter the crankcase through the open crankcase solenoid valve, and compressed dry gas is added to the crankcase, thereby forming a single-line air supply, so that the gas moisture content inside the internal combustion engine is maintained at a low level, which can significantly reduce the risk of rust in the various components of the internal combustion engine.

[0082] Step S105: During the single-channel air supply process, the original gas in the cylinder and the crankcase is extracted to form a gas flow.

[0083] During the single-way air replenishment process, that is, the process of replenishing compressed dry gas into the crankcase, the replenished compressed dry gas in the crankcase will also enter the cylinder connected to the crankcase. At the same time, the ventilation pump extracts the original gas in the cylinder and crankcase through the exhaust pipe to form a gas flow. The gas in the crankcase and cylinder with a high water content that is prone to cause rust of the internal combustion engine can be replaced with compressed dry air, thereby realizing ventilation of the internal combustion engine and reducing the risk of rust of the internal combustion engine.

[0084] In practical applications, during the single-line air supply process, the air exchange pump can be operated at low power to extract the original gas in the cylinder and crankcase.

[0085] Among them, during the ventilation process of the internal combustion engine, it is also necessary to obtain the crankcase gas moisture content in real time until the crankcase gas moisture content is less than the moisture content upper limit threshold, and the single-path air replenishment process is stopped.

[0086] In summary, the present invention discloses a method for preventing rust in an internal combustion engine. When the moisture content of the crankcase gas is less than an upper moisture content threshold and not less than a lower moisture content threshold, the obtained compressed dry air is output to the crankcase to form a single-way air supply. During the single-way air supply process, the original gas in the cylinder and the crankcase is extracted to form a gas flow. The present invention maintains the state of the injector injecting fuel into the cylinder unchanged, ensures that the mixture concentration and combustion efficiency in the combustion chamber are not affected by the air supply operation, and maintains the power, torque and other performance parameters of the engine at the original level. At the same time, by only controlling the crankcase solenoid valve to open, the compressed dry air is directly introduced into the crankcase through the opened crankcase solenoid valve, and the original gas in the cylinder and the crankcase is extracted to form a gas flow, thereby achieving ventilation of the internal combustion engine, keeping the gas moisture content inside the internal combustion engine at a low level, thereby significantly reducing the risk of corrosion of various components in the internal combustion engine, keeping the internal combustion engine in a good working state, and thus extending the service life of the internal combustion engine.

[0087] In one embodiment, after step S101, the following steps may also be included:

[0088] Step S106: If the crankcase gas moisture content is less than the moisture content lower threshold, it is determined that the internal combustion engine is at a low corrosion risk, and the internal combustion engine is controlled to be powered off.

[0089] In the present invention, when the crankcase gas moisture content ω is less than α, it indicates that the gas moisture content of various components in the internal combustion engine, such as the cylinder, crankcase and exhaust system, is at a level with a low risk of rust in the internal combustion engine. At this time, the internal combustion engine is not ventilated, and the internal combustion engine is directly controlled to be powered off and enter the parking control program.

[0090] The above description of the various embodiments tends to emphasize the differences between the various embodiments. The same or similar aspects can be referenced with each other and will not be repeated herein for the sake of brevity.

[0091] See also Figure 4 , a flowchart of a specific example of an internal combustion engine corrosion prevention method disclosed in an embodiment of the present invention, the specific process may include the following steps:

[0092] (1) Multiple gas moisture sensors are arranged in the crankcase, cylinder, turbocharger volute, exhaust manifold and exhaust tail pipe of the internal combustion engine.

[0093] (2) A normally operating internal combustion engine receives a stop command, cuts off the fuel supply valve, and stops fuel injection.

[0094] (3) After the engine rail pressure continues to decrease, the fuel injection valve cannot open and the injection action in the cylinder cannot be completed. The internal combustion engine automatically shuts down. At this time, the fuel in the supply pipeline is consumed to prevent the risk of fuel leakage in the future.

[0095] (4) Monitor the crankcase gas status.

[0096] (5) The crankcase gas moisture content ω is detected by a gas moisture content sensor.

[0097] (a) When the crankcase gas moisture content ω ≥ β, the air compressor starts to generate compressed air. If the compressed air's moisture content ≥ α, the compressed air is fed into a drying oven for drying until the compressed air's moisture content is less than α, producing compressed dry air. If the compressed air's moisture content is less than α, the compressed air is directly used as compressed dry air. The injector fuel switching valve is controlled to close the fuel supply channel (i.e., the passage between the fuel and the injector is closed during normal operation of the entire engine) and the compressed air channel is opened, allowing the injector to inject compressed dry air into the cylinder, thereby replenishing the cylinder with compressed dry gas. Simultaneously, the crankcase solenoid valve is controlled to open, allowing compressed dry air to enter the crankcase directly through the opened crankcase solenoid valve, thereby replenishing the crankcase with compressed dry gas, forming a dual-path air supply system. The ventilation pump operates at high power, rapidly extracting the original gas in the cylinder and crankcase through the exhaust pipe, forming a gas flow, thereby replacing the gas with high water content that is prone to causing corrosion of the internal combustion engine with compressed dry air, thereby achieving ventilation of the internal combustion engine and reducing the risk of corrosion of the internal combustion engine. During the ventilation process of the internal combustion engine, return to step (4) to continue monitoring the crankcase gas status.

[0098] (b) When α≤crankcase gas moisture contentω<β, the air compressor starts to generate compressed air. If the gas moisture content of the compressed air is ≥α, the compressed air is input into the drying box for drying until the gas moisture content of the compressed air is <α, thereby obtaining compressed dry air. If the gas moisture content of the compressed air is <α, the compressed air is directly used as compressed dry air. Only the crankcase solenoid valve is controlled to open, so that the compressed dry air can directly enter the crankcase through the opened crankcase solenoid valve, thereby replenishing the crankcase with compressed dry gas, thereby forming a single-line air supply, so that the gas moisture content inside the internal combustion engine is maintained at a low level, thereby significantly reducing the risk of rust on various components in the internal combustion engine. During the process of exchanging air for the internal combustion engine, return to step (4) to continue monitoring the crankcase gas state.

[0099] (c) When the crankcase gas moisture content ω is less than α, it indicates that the gas moisture content of various components within the internal combustion engine, such as the cylinder, crankcase, and exhaust system, is at a low risk of rusting the internal combustion engine. The internal combustion engine is directly powered off and enters the shutdown control procedure.

[0100] Corresponding to the above method embodiment, the present invention also discloses an internal combustion engine anti-corrosion device.

[0101] See also Figure 5, a schematic structural diagram of an internal combustion engine anti-corrosion device disclosed in an embodiment of the present invention, the device may include:

[0102] The water content acquisition unit 201 is used to acquire the water content of the crankcase gas when the internal combustion engine is in a flameout state.

[0103] When a normally operating internal combustion engine receives a stop command, it first cuts off the fuel supply valve and stops fuel injection. Then, as the engine rail pressure continues to decrease, the fuel injection valve cannot open and the injection action in the cylinder cannot be completed, causing the internal combustion engine to automatically shut down. At this time, the fuel in the supply pipeline is consumed to prevent the risk of fuel leakage later.

[0104] The present application obtains the crankcase gas moisture content detected by the gas moisture sensor when the internal combustion engine is in the off state. In practical applications, the gas moisture sensor can be set in the crankcase or the cylinder. Since the pressure and temperature in the crankcase are relatively low compared to those in the cylinder, it helps to increase the life of the gas moisture sensor. Therefore, the gas moisture sensor is preferably set in the crankcase. Of course, in addition to being set in the crankcase and the cylinder, the gas moisture sensor can also be set in other locations of the internal combustion engine, for example, in the exhaust tail pipe, exhaust manifold, supercharger volute, etc. of the exhaust system. The specific setting location can be determined according to actual needs.

[0105] The dual-path air supply unit 202 is used to output the obtained compressed dry air to the cylinder and the crankcase simultaneously if the moisture content of the crankcase gas is not less than the upper moisture content threshold, thereby forming a dual-path air supply.

[0106] The dual-path air supply unit 202 can be specifically used for:

[0107] If the crankcase gas moisture content is not less than the moisture content upper limit threshold, starting the air compressor to obtain compressed air;

[0108] When the compressed air meets the set drying condition, the injector fuel switching valve is controlled to close the fuel supply channel and open the compressed air channel, and the crankcase solenoid valve is controlled to open at the same time;

[0109] The compressed air is used as the compressed dry air and is outputted into the crankcase through the crankcase solenoid valve. At the same time, the compressed dry air is outputted into the cylinder through the ejector, forming a dual-path air supply.

[0110] The first air extraction unit 203 is used to extract the original gas in the cylinder and the crankcase during the dual-path air supply process to form a gas flow.

[0111] The first air extraction unit 203 can be specifically used for:

[0112] If the crankcase gas moisture content is less than the moisture content upper limit threshold and not less than the moisture content lower limit threshold, starting the air compressor to obtain compressed air;

[0113] When the compressed air meets the set drying conditions, the crankcase solenoid valve is controlled to open;

[0114] The compressed air is used as the compressed dry air and outputted into the crankcase through the crankcase solenoid valve, forming a single-circuit air supply.

[0115] In summary, the present invention discloses an anti-corrosion device for an internal combustion engine. When the internal combustion engine is in a flameout state, the crankcase gas moisture content is obtained. If the crankcase gas moisture content is not less than the moisture content upper limit threshold, the obtained compressed dry air is simultaneously output to the cylinder and the crankcase, forming a dual-path air supply. During the dual-path air supply process, the original gas in the cylinder and the crankcase is extracted to form a gas flow. The present invention replaces the gas in the crankcase and the cylinder with a high moisture content that is prone to cause corrosion of the internal combustion engine with compressed dry air, that is, by ventilating the internal combustion engine, the moisture content of the gas inside the internal combustion engine is maintained at a low level, thereby significantly reducing the risk of corrosion of various components in the internal combustion engine, keeping the internal combustion engine in a good working state, and thus extending the service life of the internal combustion engine.

[0116] In one embodiment, the dual-path air supply unit 202 may also be used for:

[0117] If the gas moisture content of the compressed air is less than the moisture content lower limit threshold, it is determined that the compressed air meets the set drying condition;

[0118] If the gas moisture content of the compressed air is not less than the moisture content lower limit threshold, the compressed air is input into a drying box for drying, so that the compression control after drying satisfies the set drying condition.

[0119] In one embodiment, the internal combustion engine anti-corrosion device may further include:

[0120] a single-circuit air supply unit, configured to output the obtained compressed dry air into the crankcase if the moisture content of the crankcase gas is less than the moisture content upper threshold and not less than the moisture content lower threshold, thereby forming a single-circuit air supply, wherein the moisture content lower threshold is less than the moisture content upper threshold;

[0121] The second air extraction unit is used to extract the original gas in the cylinder and the crankcase during the single-channel air supply process to form a gas flow.

[0122] In summary, the present invention discloses a method for preventing rust in an internal combustion engine. When the moisture content of the crankcase gas is less than an upper moisture content threshold and not less than a lower moisture content threshold, the obtained compressed dry air is output to the crankcase to form a single-way air supply. During the single-way air supply process, the original gas in the cylinder and the crankcase is extracted to form a gas flow. The present invention maintains the state of the injector injecting fuel into the cylinder unchanged, ensures that the mixture concentration and combustion efficiency in the combustion chamber are not affected by the air supply operation, and maintains the power, torque and other performance parameters of the engine at the original level. At the same time, by only controlling the crankcase solenoid valve to open, the compressed dry air is directly introduced into the crankcase through the opened crankcase solenoid valve, and the original gas in the cylinder and the crankcase is extracted to form a gas flow, thereby achieving ventilation of the internal combustion engine, keeping the gas moisture content inside the internal combustion engine at a low level, thereby significantly reducing the risk of corrosion of various components in the internal combustion engine, keeping the internal combustion engine in a good working state, and thus extending the service life of the internal combustion engine.

[0123] In one embodiment, the single-circuit air supply unit can be used to:

[0124] If the crankcase gas moisture content is less than the moisture content upper limit threshold and not less than the moisture content lower limit threshold, starting the air compressor to obtain compressed air;

[0125] When the compressed air meets the set drying conditions, the crankcase solenoid valve is controlled to open;

[0126] The compressed air is used as the compressed dry air and outputted into the crankcase through the crankcase solenoid valve, forming a single-circuit air supply.

[0127] In one embodiment, the internal combustion engine anti-corrosion device may further include:

[0128] The internal combustion engine power-off unit is configured to determine that the internal combustion engine is at a low corrosion risk and control the internal combustion engine to be powered off if the crankcase gas moisture content is less than a moisture content lower threshold.

[0129] It should be noted that, for the specific working principles of the various components in the device embodiment, please refer to the corresponding part of the method embodiment, which will not be repeated here.

[0130] Corresponding to the above embodiment, the present invention further discloses a computer storage medium, which stores at least one instruction. When the at least one instruction is executed by a processor, the steps shown in the embodiment of the internal combustion engine anti-corrosion method are implemented.

[0131] A computer storage medium may be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, apparatus, or device. A computer storage medium may be a machine-readable signal medium or a machine-readable storage medium. A computer storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of machine-readable storage media may include an electrical connection based on one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0132] Corresponding to the above embodiment, Figure 6 As shown, the present invention also provides a structural diagram of an electronic device, which may include: a processor 1 and a memory 2;

[0133] The processor 1 and the memory 2 communicate with each other via a communication bus 3.

[0134] Processor 1, configured to execute at least one instruction;

[0135] Memory 2, used to store at least one instruction;

[0136] The processor 1 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present invention.

[0137] The memory 2 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

[0138] The processor executes at least one instruction to implement the steps shown in the embodiment of the internal combustion engine anti-corrosion method.

[0139] Finally, it should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0140] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0141] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one 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 present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for preventing corrosion of an internal combustion engine, characterized in that: include: When the internal combustion engine is in a flameout state, the water content of the crankcase gas is obtained; If the crankcase gas moisture content is not less than the moisture content upper limit threshold, the obtained compressed dry air is output to the cylinder and the crankcase simultaneously, forming a dual-path air supply; During the dual-path gas replenishment process, the original gas in the cylinder and the crankcase is extracted to form a gas flow.

2. The internal combustion engine anti-corrosion method according to claim 1, characterized in that: Also includes: If the crankcase gas moisture content is less than the moisture content upper threshold and not less than the moisture content lower threshold, outputting the obtained compressed dry air into the crankcase to form a single-path air supply, wherein the moisture content lower threshold is less than the moisture content upper threshold; During the single-path gas replenishment process, the original gas in the cylinder and the crankcase is extracted to form a gas flow.

3. The internal combustion engine anti-corrosion method according to claim 2, characterized in that: Also includes: If the crankcase gas moisture content is less than a moisture content lower threshold, it is determined that the internal combustion engine is at a low corrosion risk, and the internal combustion engine is controlled to be powered off.

4. The internal combustion engine anti-corrosion method according to any one of claims 1 to 3, characterized in that: If the crankcase gas moisture content is not less than the moisture content upper limit threshold, the obtained compressed dry air is simultaneously output to the cylinder and the crankcase to form a dual-path air supply, including: If the crankcase gas moisture content is not less than the moisture content upper limit threshold, starting the air compressor to obtain compressed air; When the compressed air meets the set drying condition, the injector fuel switching valve is controlled to close the fuel supply channel and open the compressed air channel, and the crankcase solenoid valve is controlled to open at the same time; The compressed air is used as the compressed dry air and is outputted into the crankcase through the crankcase solenoid valve. At the same time, the compressed dry air is outputted into the cylinder through the ejector, forming a dual-path air supply.

5. The internal combustion engine corrosion prevention method according to claim 4, characterized in that: The process of determining whether the compressed air meets the set drying condition includes: If the gas moisture content of the compressed air is less than the moisture content lower limit threshold, it is determined that the compressed air meets the set drying condition; If the gas moisture content of the compressed air is not less than the moisture content lower limit threshold, the compressed air is input into a drying box for drying, so that the compression control after drying satisfies the set drying condition.

6. The internal combustion engine anti-corrosion method according to claim 2 or 3, characterized in that: If the moisture content of the crankcase gas is less than the moisture content upper threshold and not less than the moisture content lower threshold, the obtained compressed dry air is output to the crankcase to form a single-path air supply, including: If the crankcase gas moisture content is less than the moisture content upper limit threshold and not less than the moisture content lower limit threshold, starting the air compressor to obtain compressed air; When the compressed air meets the set drying conditions, the crankcase solenoid valve is controlled to open; The compressed air is used as the compressed dry air and outputted into the crankcase through the crankcase solenoid valve, forming a single-circuit air supply.

7. The internal combustion engine corrosion prevention method according to claim 1, characterized in that: When the internal combustion engine is in a flameout state, obtaining the crankcase gas moisture content includes: When the internal combustion engine is in a flameout state, the crankcase gas moisture content detected by a gas moisture content sensor is obtained, where the gas moisture content sensor is disposed in the crankcase or the cylinder.

8. An internal combustion engine anti-corrosion device, characterized in that: include: a water content acquisition unit, for acquiring the water content of the crankcase gas when the internal combustion engine is in a flameout state; A dual-path air supply unit is used to output the obtained compressed dry air to the cylinder and the crankcase simultaneously if the moisture content of the crankcase gas is not less than the upper moisture content threshold, thereby forming a dual-path air supply; The first air extraction unit is used to extract the original gas in the cylinder and the crankcase during the dual-path air supply process to form a gas flow.

9. A computer storage medium, characterized in that The computer storage medium stores at least one instruction, and when the at least one instruction is executed by the processor, the internal combustion engine corrosion prevention method according to any one of claims 1 to 7 is implemented.

10. An electronic device, characterized in that: The electronic device includes: a memory and a processor; The memory is used to store at least one instruction; The processor is used to execute the at least one instruction to implement the internal combustion engine corrosion prevention method according to any one of claims 1 to 7.

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