Engine condensate water discharge method, condensate water discharge system, and related apparatus

Abstract

The application discloses a kind of engine condensate water discharge method, condensate water discharge system and related equipment applied to internal combustion engine technical field, in the lower part of intake manifold pressure chamber, configuration condensate water collection chamber, based on gravity effect collection condensate water, reduce the condensate water that gas enters the cylinder of engine with gas. Utilize control equipment control first switch valve and second switch valve, in the case where first switch valve and second switch valve are both opened, so that gas is discharged from intake manifold pressure chamber, through intake high pressure pipeline, venturi and exhaust pipeline.Gas is passed through the fine tube portion of venturi, based on the suction force generated by venturi effect, condensate water is sucked out from condensate water collection chamber, and is discharged to the outside environment with gas. Thus, on the basis of reducing the adjustment to the structure of intake manifold, the condensate water generated in the intake system can be collected, and the condensate water can be discharged to the outside environment, reducing the engine misfire problem caused by the condensate water entering the cylinder.

Description

Technical Field

[0001] This application relates to the field of internal combustion engine technology, specifically to a method for draining engine condensate, a condensate draining system, and related equipment. Background Technology

[0002] The engine's intake system employs Exhaust Gas Recirculation (EGR) technology and water-cooled intercooling technology to reduce fuel consumption and emissions. EGR technology primarily refers to the technique of redirecting a portion of the exhaust gases after combustion into the intake side of the internal combustion engine, allowing it to re-intake air. This reduces nitrogen oxides in the vehicle's exhaust gases and improves fuel economy. Water-cooled intercooling technology is an intercooling system that uses water for heat dissipation. During engine intake, the air flowing through the pipes and intercooling system is easily affected by low temperatures, producing condensation. This condensation travels with the air through the multiple intake manifolds included in the intake system and enters the engine cylinders.

[0003] The intake manifold is affected by factors such as its layout, installation, and cylinder head intake port matching design. The process by which condensate enters the intake system, including the manifold pressure regulating chamber, and then to each manifold along with the airflow is quite complex. It is difficult to evenly distribute the condensate by changing the intake manifold structure. This may result in a large amount of condensate entering the same cylinder, leading to engine misfire.

[0004] Currently, there is a lack of effective methods for treating condensate in the engine's intake system. Summary of the Invention

[0005] In view of this, this application provides a method for draining engine condensate, a condensate draining system and related equipment, which can effectively reduce engine misfire caused by condensate entering the cylinder.

[0006] The technical solution provided in this application is as follows:

[0007] In a first aspect, this application provides a method for draining engine condensate. The method is applied to a control device included in a condensate draining system. The condensate draining system further includes an engine intake manifold assembly. The engine intake manifold assembly includes an intake manifold assembly, a venturi tube, an intake high-pressure line, an exhaust line, a coolant outlet pipe, a first switching valve, and a second switching valve. The intake manifold assembly includes an intake manifold pressure regulating chamber, a condensate collection chamber, and a condensate collection pipe. The condensate collection chamber is located below the intake manifold pressure regulating chamber. One end of the condensate collection pipe is connected to the lower bottom surface of the intake manifold pressure regulating chamber. One end is located in the condensate collection chamber. The condensate collection pipe is used to guide the condensate in the intake manifold pressure regulating chamber into the condensate collection chamber. The intake manifold pressure regulating chamber is connected to the first end of the venturi tube through the intake high-pressure pipeline. The intake high-pressure pipeline is equipped with the first switching valve, which is connected to the control device. The condensate collection chamber is connected to the thin tube portion of the venturi tube through the water outlet pipe. The second end of the venturi tube is connected to the external environment through the exhaust pipeline. The exhaust pipeline is equipped with the second switching valve, which is connected to the control device.

[0008] The control device acquires the condensate water level in the condensate collection chamber;

[0009] If the condensate water level is greater than or equal to the first water level threshold, the control device controls the second switch valve to open, so that the venturi tube is connected to the external environment;

[0010] The control device acquires the pressure value inside the intake manifold pressure regulating chamber;

[0011] If the difference between the pressure value inside the cavity and the atmospheric pressure value is greater than or equal to the pressure difference threshold, the control device controls the first switch valve to open, so that the gas is discharged from the intake manifold pressure regulating cavity through the intake high-pressure pipeline, the venturi tube and the exhaust pipeline. When the gas passes through the thin tube part of the venturi tube, it generates suction to draw the condensate from the condensate collection cavity through the water outlet pipe and discharge it to the external environment with the gas.

[0012] In one possible implementation, the method further includes:

[0013] If the condensate water level is less than or equal to the second water level threshold, the control device controls the first switch valve and the second switch valve to close, and the second water level threshold is less than the first water level threshold.

[0014] In one possible implementation, the method further includes:

[0015] If the condensate level is 0, the control device controls the second switch valve to close.

[0016] In one possible implementation, the condensate collection pipe is provided with a one-way valve, which is used to prevent condensate from flowing back from the condensate collection chamber through the condensate collection pipe to the intake manifold pressure regulating chamber.

[0017] Secondly, this application provides a condensate drainage system, which includes a control device and an engine intake manifold device. The engine intake manifold device includes an intake manifold assembly, a venturi tube, an intake high-pressure line, an exhaust line, a water outlet pipe, a first switching valve, and a second switching valve.

[0018] The intake manifold assembly includes an intake manifold pressure regulating chamber, a condensate collection chamber, and a condensate collection pipe. The condensate collection chamber is located below the intake manifold pressure regulating chamber. One end of the condensate collection pipe is connected to the lower bottom surface of the intake manifold pressure regulating chamber, and the other end is located inside the condensate collection chamber. The condensate collection pipe is used to guide the condensate in the intake manifold pressure regulating chamber into the condensate collection chamber. The intake manifold pressure regulating chamber is connected to the first end of the venturi tube through the intake high-pressure pipeline. The intake high-pressure pipeline is equipped with a first switching valve, which is connected to the control device. The condensate collection chamber is connected to the thin tube portion of the venturi tube through the water outlet pipe. The second end of the venturi tube is connected to the external environment through the exhaust pipeline. The exhaust pipeline is equipped with a second switching valve, which is connected to the control device.

[0019] The control device is used to obtain the condensate water level in the condensate collection chamber. If the condensate water level is greater than or equal to the first water level threshold, the second switch valve is controlled to open, so that the venturi tube is connected to the external environment.

[0020] The control device is also used to obtain the pressure value inside the intake manifold pressure regulating chamber. If the difference between the pressure value inside the chamber and the atmospheric pressure is greater than or equal to the pressure difference threshold, the first switch valve is controlled to open, so that the gas is discharged from the intake manifold pressure regulating chamber through the intake high-pressure pipeline, the venturi tube and the exhaust pipeline. When the gas passes through the thin tube part of the venturi tube, it generates suction to draw the condensate from the condensate collection chamber through the outlet pipe and discharge it to the external environment with the gas.

[0021] In one possible implementation, the control device is further configured to control the first switch valve to close and the second switch valve to close if the condensate water level is less than or equal to a second water level threshold, wherein the second water level threshold is less than the first water level threshold.

[0022] In one possible implementation, the control device is further configured to control the second switching valve to close if the condensate water level is equal to 0.

[0023] In one possible implementation, the condensate collection pipe is provided with a one-way valve, which is used to prevent condensate from flowing back from the condensate collection chamber through the condensate collection pipe to the intake manifold pressure regulating chamber.

[0024] Thirdly, this application provides a control device, including: a processor, a memory, and a system bus;

[0025] The processor and the memory are connected via the system bus;

[0026] The memory is used to store one or more programs, the one or more programs including instructions that, when executed by the processor, cause the processor to perform the method described in any of the embodiments of the first aspect above.

[0027] Fourthly, this application provides a computer-readable storage medium storing instructions that, when executed on a terminal device, cause the terminal device to perform the method described in any of the embodiments of the first aspect.

[0028] Therefore, this application has the following beneficial effects:

[0029] This application provides a method, system, and related equipment for draining engine condensate. A condensate collection chamber is configured at the lower part of the intake manifold pressure regulating chamber. Based on gravity, the condensate collection chamber collects condensate, reducing the amount of condensate entering the engine cylinders with the gas. A control device controls the opening and closing of a first and a second switching valve. When both valves are open, gas is discharged from the intake manifold pressure regulating chamber through the intake high-pressure line, the venturi tube, and the exhaust line. When the gas passes through the narrow section of the venturi tube, due to the Venturi effect, the gas velocity increases, generating suction that draws the condensate from the condensate collection chamber through the outlet pipe and discharges it to the external environment. This method collects condensate generated in the intake system and discharges it to the external environment with minimal structural adjustments to the intake manifold, reducing the risk of engine misfires caused by condensate entering the cylinders. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of a condensate drainage system provided in an embodiment of this application;

[0031] Figure 2This is a schematic diagram of another condensate drainage system provided in an embodiment of this application;

[0032] Figure 3 A schematic flowchart illustrating a method for draining engine condensate provided in an embodiment of this application;

[0033] Figure 4 This is a schematic flowchart illustrating another method for draining engine condensate provided in an embodiment of this application. Detailed Implementation

[0034] To facilitate understanding and explanation of the technical solutions provided in the embodiments of this application, the background technology of this application will be described first.

[0035] To reduce emissions and maximize fuel efficiency, vehicle engines employ EGR and water-cooled intercooling technologies. The engine's intake system compresses fresh air and exhaust gases from the previous combustion cycle, using them as fuel for the next combustion cycle. However, the exhaust gases are relatively hot, and as they pass through the intake system, condensation may occur because the ambient temperature is lower than the gas temperature. This condensate then flows into the cylinders through the intake manifold.

[0036] The intake manifold of the intake system is designed based on the uniformity and mixing of exhaust gas and air, but it does not take into account the uniformity of condensate. This makes it difficult to avoid a large amount of condensate flowing into the cylinders, causing incomplete combustion and ultimately misfires. Furthermore, the intake manifold has a relatively complex structure. The process of condensate flowing through the intake manifold with the gas is also complex, making it difficult to optimize the manifold structure to ensure that condensate flows evenly to each cylinder. Currently, there is a lack of effective methods for handling condensate in the engine's intake system.

[0037] Based on this, this application provides a condensate drainage system, which includes an engine intake manifold assembly and control equipment. The engine intake manifold assembly includes an intake manifold assembly, a venturi tube, an intake high-pressure line, an exhaust line, a water outlet pipe, a first switching valve, and a second switching valve. The intake manifold assembly includes an intake manifold pressure regulating chamber, a condensate collection chamber, and a condensate collection pipe. The condensate collection chamber is located below the intake manifold pressure regulating chamber, facilitating the collection of condensate under gravity through the condensate collection pipe. One end of the condensate collection pipe is connected to the lower surface of the intake manifold pressure regulating chamber, and the other end is located inside the condensate collection chamber. The condensate collection pipe is used to guide the condensate in the intake manifold pressure regulating chamber into the condensate collection chamber. The intake manifold pressure regulating chamber and the first end of the venturi tube are connected via the intake high-pressure line. The intake high-pressure line is equipped with a first switching valve. The first switching valve is connected to the control equipment. The condensate collection chamber and the thinner portion of the venturi tube are connected via the water outlet pipe. The second end of the venturi tube is connected to the external environment via an exhaust pipe. A second on / off valve is installed in the exhaust pipe. This second on / off valve is connected to control equipment.

[0038] By controlling the opening and closing of the first and second switching valves using control equipment, when both valves are open, gas is allowed to exit from the intake manifold pressure regulating chamber, through the intake high-pressure line, the venturi tube, and the exhaust line. When the gas passes through the narrow section of the venturi tube, due to the Venturi effect, the gas velocity increases, generating suction that draws condensate from the condensate collection chamber through the outlet pipe, and is discharged into the external environment with the gas. This allows for the collection of condensate generated in the intake system and its discharge into the external environment with minimal adjustments to the intake manifold structure, reducing the risk of engine misfires caused by condensate entering the cylinders.

[0039] To facilitate understanding of the technical solutions provided in the embodiments of this application, the condensate drainage system provided in the embodiments of this application will be described below with reference to the accompanying drawings.

[0040] See Figure 1 As shown in the figure, this figure is a structural schematic diagram of a condensate drainage system provided in an embodiment of this application.

[0041] The condensate drainage system 100 includes a control device 110 and an engine intake manifold device 120.

[0042] The control device 110 is, for example, an electronic control unit (ECU). The engine intake manifold device 120 can be applied to a hybrid engine.

[0043] The engine intake manifold assembly 120 includes an intake manifold assembly 121, a venturi tube 122, an intake high-pressure line 123, an exhaust line 124, a water outlet line 125, a first switching valve 126, and a second switching valve 127.

[0044] The intake manifold assembly 121 includes an intake manifold pressure regulating chamber 1211, a condensate collection chamber 1212, and a condensate collection pipe 1213. The condensate collection chamber 1212 is located below the intake manifold pressure regulating chamber 1211. The condensate collection chamber 1212 is located at the lowest point of the entire intake system so that condensate is collected by gravity, reducing the amount of condensate entering the engine cylinders with the airflow. Additionally, as an example, the bottom plane of the condensate collection chamber 1212 is parallel to the horizontal plane to ensure a level condensate level, facilitating accurate condensate level measurement by the control device 110.

[0045] One end of the condensate collection pipe 1213 is connected to the lower surface of the intake manifold pressure regulating chamber 1211, and the other end is located inside the condensate collection chamber 1212. The condensate collection pipe 1213 is used to guide the condensate in the intake manifold pressure regulating chamber 1211 into the condensate collection chamber 1212 under the action of gravity. The condensate collection pipe 1213 has a certain length, and the outlet of the condensate collection pipe 1213, that is, the port inside the condensate collection chamber 1212, is less than a height threshold from the bottom plane of the condensate collection chamber 1212. This allows the condensate collection chamber 1212 to store a certain amount of condensate, submerging the outlet of the condensate collection pipe 1213, thus using the condensate to isolate the gas and prevent gas from escaping from the intake manifold pressure regulating chamber 1211 through the condensate collection pipe 1213. It also prevents gas in the venturi tube 122 from entering the intake manifold pressure regulating chamber 1211, providing a certain degree of sealing.

[0046] The intake manifold pressure regulating chamber 1211 and the first end of the venturi tube 122 are connected via an intake high-pressure pipeline 123. The intake high-pressure pipeline 123 is equipped with a first switching valve 126. The first switching valve 126 is connected to a control device 110. Under the control of the control device 110, the first switching valve 126 opens and closes to regulate the flow of gas within the intake high-pressure pipeline 123.

[0047] The condensate collection chamber 1212 is connected to the thin section of the Venturi tube 122 via an outlet pipe 125. The second end of the Venturi tube 122 is connected to the external environment via an exhaust pipe 124. A second switching valve 127 is installed in the exhaust pipe 124. The second switching valve 127 is connected to the control device 110. Under the control of the control device 110, the second switching valve 127 opens and closes to regulate whether the Venturi tube 122 is connected to the external environment.

[0048] Control device 110 is used to acquire the condensate level in condensate collection chamber 1212 and control the second switching valve 127 to open or close based on the condensate level. Control device 110 is also used to acquire the internal pressure value of intake manifold pressure regulating chamber 1211 and control the first switching valve 126 to open or close based on the difference between the internal pressure value and atmospheric pressure. For a detailed description of the specific functions of control device 110, please refer to the following description of the engine condensate drainage method.

[0049] The control device 110 controls the opening and closing of the first switching valve 126 and the second switching valve 127. When both valves are open, gas is discharged from the intake manifold pressure regulating chamber 1211 through the intake high-pressure line 123, the venturi tube 122, and the exhaust line 124. When the gas passes through the narrow section of the venturi tube 122, due to the Venturi effect, the gas velocity increases, generating suction that draws condensate from the condensate collection chamber 1212 through the outlet pipe 125, and is discharged into the external environment with the gas. This allows for the collection of condensate generated in the intake system and its discharge into the external environment with minimal adjustments to the intake manifold structure, reducing the risk of engine misfires caused by condensate entering the cylinders.

[0050] Additionally, in one possible implementation, see [link to relevant documentation]. Figure 2 As shown in the figure, this is a schematic diagram of another condensate drainage system provided in an embodiment of this application. A one-way valve 1214 is provided on the condensate collection pipe 1213. The one-way valve 1214 controls the flow of condensate from the intake manifold pressure regulating chamber 1211 to the condensate collection chamber 1212, preventing condensate from flowing back from the condensate collection chamber 1212 to the intake manifold pressure regulating chamber 1211 through the condensate collection pipe 1213. The one-way valve 1214 controls the flow direction of the condensate, preventing backflow and facilitating the collection of condensate in the intake manifold by the condensate collection chamber 1212. This allows for control of the condensate flow direction and also facilitates the extraction of condensate from the condensate collection chamber 1212 into the external environment, reducing the amount of condensate entering the cylinder and affecting the normal operation of the engine.

[0051] Specifically, this application provides a method for draining engine condensate from a control device 110 included in a condensate draining system. See also... Figure 3 As shown, this figure is a schematic flowchart of a method for draining engine condensate according to an embodiment of this application. Figure 3 As shown in the embodiment of this application, a method for draining engine condensate includes steps S301-S304.

[0052] S301: Control device 110 obtains the condensate water level in condensate collection chamber 1212.

[0053] The condensate level in the condensate collection chamber 1212 changes as condensate is collected. The control device 110 determines whether condensate needs to be drained by acquiring the condensate level in the condensate collection chamber 1212.

[0054] This application does not limit the specific implementation method of the control device 110 acquiring the condensate water level. As an example, a water level detection device is provided in the condensate collection chamber 1212. The water level detection device is, for example, a liquid level sensor. The water level detection device is used to detect the condensate water level in the condensate collection chamber 1212. The water level detection device can detect the condensate water level in the condensate collection chamber 1212 in real time and send the detected condensate water level to the control device 110 in real time. Alternatively, the water level detection device can periodically detect the condensate water level in the condensate collection chamber 1212 and periodically send the detected condensate water level to the control device 110. As another example, a sensor is set at a specific water level in the condensate collection chamber 1212. When the condensate water level in the condensate collection chamber 1212 reaches the characteristic water level, the sensor sends a water level signal to the control device 110. The control device 110 can determine the condensate water level based on the sensor that sent the water level signal and the water level position corresponding to the sensor.

[0055] S302: If the condensate water level is greater than or equal to the first water level threshold, the control device 110 controls the second switch valve 127 to open, so that the venturi tube 122 is connected to the external environment.

[0056] The first water level threshold is a pre-set water level threshold used to trigger the opening of the second switch valve 127. The first water level threshold can be set based on the need to draw condensate from the condensate collection chamber 1212. The value of the first water level threshold affects the frequency of condensate drawing. As an example, the value range of the first water level threshold is between the water level in the condensate collection chamber 1212 corresponding to the position of the outlet of the condensate collection pipe 1213 and the water level corresponding to the position of the outlet pipe 125.

[0057] The control device 110 compares the acquired condensate water level with a first water level threshold. If the condensate water level is greater than or equal to the first water level threshold, it indicates that the second switch valve 127 needs to be opened. The control device 110 controls the second switch valve 127 to open. As an example, the control device 110 sends an opening command to the second switch valve 127. After receiving the opening command, the second switch valve 127 executes the opening action. After the second switch valve 127 opens, the venturi tube 122 is connected to the external environment through the exhaust pipe 124. The air pressure in the venturi tube 122 is the air pressure of the external environment, that is, atmospheric pressure.

[0058] S303: Control device 110 acquires the pressure value inside the intake manifold pressure regulating chamber 1211.

[0059] The pressure value inside the intake manifold pressure regulating chamber 1211 will change depending on the amount of gas entering the intake manifold pressure regulating chamber 1211.

[0060] This application does not limit the specific implementation method by which the control device 110 obtains the internal pressure value of the intake manifold pressure regulating chamber 1211. As an example, a pressure detection device is provided inside the intake manifold pressure regulating chamber 1211. The pressure detection device is, for example, a pressure sensor. The pressure detection device detects the pressure inside the intake manifold pressure regulating chamber 1211 and sends the obtained internal pressure value to the control device 110. The pressure detection device can detect the pressure inside the intake manifold pressure regulating chamber 1211 in real time and send the detected internal pressure value to the control device 110 in real time. Alternatively, the pressure detection device periodically detects the pressure inside the intake manifold pressure regulating chamber 1211 and periodically sends the detected internal pressure value to the control device 110.

[0061] This application embodiment does not limit the execution order of S302 and S303. In one possible implementation scenario, the control device 110 can execute S303 after executing S302. That is, the control device 110 obtains the cavity pressure value after determining that the condensate water level is greater than or equal to the first water level threshold. In another possible implementation scenario, the control device 110 executes S303 simultaneously with S301 and S302. That is, the process of obtaining the condensate water level and determining whether the condensate water level is greater than or equal to the first water level threshold is executed in parallel with obtaining the cavity pressure value of the intake manifold pressure regulating cavity 1211.

[0062] S304: If the difference between the pressure value inside the cavity and the atmospheric pressure value is determined to be greater than or equal to the pressure difference threshold, the control device 110 controls the first switching valve 126 to open.

[0063] The control device 110 calculates the difference between the pressure value inside the chamber and the pressure value in the venturi tube 122, which is the atmospheric pressure. This difference reflects the pressure gap between the intake manifold pressure regulating chamber 1211 and the venturi tube 122. This difference affects the flow rate of gas from the intake manifold pressure regulating chamber 1211 through the intake high-pressure line 123, the venturi tube 122, and the exhaust line 124, thus affecting the magnitude of the suction force generated by the gas passing through the venturi tube 122.

[0064] If the pressure difference between the cavity and atmospheric pressure is greater than or equal to the pressure difference threshold, sufficient suction can be generated to draw condensate out of the condensate collection chamber 1212. Control device 110 controls the first switching valve 126 to open. As an example, control device 110 sends an opening command to the first switching valve 126. After receiving the opening command, the first switching valve 126 executes the opening action. After the first switching valve 126 opens, under the influence of the pressure difference between the cavity and atmospheric pressure, gas flows at a certain velocity from the intake manifold pressure regulating chamber 1211, through the intake high-pressure pipeline 123, the venturi tube 122, and the exhaust pipeline 124 to the external environment. Suction is generated in the thin section of the venturi tube 122, drawing condensate out of the condensate collection chamber 1212 through the outlet pipe 125, and discharging it into the external environment along with the gas.

[0065] This allows for the control of condensate extraction from the condensate collection chamber 1212 and its discharge into the external environment based on the condensate level and the pressure difference between the chamber and atmospheric pressure. Using a relatively simple device, condensate generated in the intake system is collected and discharged, reducing the impact of condensate on engine operation and minimizing engine misfires caused by condensate entering the cylinders.

[0066] Furthermore, in some possible implementation scenarios, during the process of discharging condensate from the condensate collection chamber 1212, it is necessary to retain some condensate in the condensate collection chamber 1212 so that when discharging condensate next time, the retained part of the condensate can be used to flush the outlet pipe 125, the venturi pipe 122 and the exhaust pipe 124 to prevent particulate matter contained in the gas from clogging the pipes.

[0067] A second water level threshold is preset. The second water level threshold is lower than the first water level threshold. The second water level threshold is used to trigger the closure of the first switching valve 126 and the second switching valve 127. The control device 110 compares the acquired condensate water level with the second water level threshold. If the condensate water level is less than or equal to the second water level threshold, there is no need to drain the condensate, and the first switching valve 126 and the second switching valve 127 are closed until the condensate water level is greater than or equal to the first water level threshold, at which point the second switching valve 127 is opened. As an example, the control device 110 sends a closing command to the first switching valve 126 and the second switching valve 127 respectively. After receiving the closing command, the first switching valve 126 and the second switching valve 127 execute the closing action.

[0068] In addition, the condensate collected in the condensate collection chamber 1212 may evaporate. For example, if the vehicle is parked for a long time, the condensate collected in the condensate collection chamber 1212 may evaporate.

[0069] Control device 110 acquires the condensate water level. If the condensate water level is 0, it indicates that there is no condensate water in the condensate water collection chamber 1212, possibly because no condensate water has been collected, or the condensate water has evaporated. Control device 110 controls the second switching valve 127 to close to prevent gas in the intake manifold pressure regulating chamber 1211 from being discharged into the external environment through the condensate water collection pipe 1213, condensate water collection chamber 1212, outlet pipe 125, venturi pipe 122, and exhaust pipe 124. As an example, control device 110 sends a closing command to the second switching valve 127. After receiving the closing command, the second switching valve 127 performs the closing action.

[0070] The following is a flowchart illustrating a method for draining engine condensate, using the control device 110 as an example (ECU). Figure 4 As shown.

[0071] The ECU continuously monitors the condensate level in the condensate collection chamber 1212. It determines if the current condensate level is 0. If the condensate level is 0, the ECU closes the second switching valve 127. If the condensate level is not 0, it determines if the current condensate level is greater than or equal to a first water level threshold H1. If the condensate level is greater than or equal to the first water level threshold H1, the ECU opens the second switching valve 127. Further, the ECU monitors the pressure inside the intake manifold pressure regulating chamber 1211. The ECU determines the pressure difference across the venturi tube 122, which is the difference between the pressure inside the intake manifold pressure regulating chamber 1211 and the atmospheric pressure. It determines if the difference is greater than or equal to a pressure difference threshold. If the difference is greater than or equal to the pressure difference threshold, the ECU opens the first switching valve 126. The ECU continuously monitors the condensate level in the condensate collection chamber 1212. The ECU determines if the current condensate level is less than or equal to a second water level threshold. If the condensate level is less than or equal to the second water level threshold, the ECU controls the first switching valve 126 and the second switching valve 127 to close.

[0072] Based on the engine condensate drainage method provided in the above method embodiments, this application provides a control device, including: a processor, a memory, and a system bus;

[0073] The processor and the memory are connected via the system bus;

[0074] The memory is used to store one or more programs, the one or more programs including instructions that, when executed by the processor, cause the processor to perform the engine condensate drainage method described in any of the above embodiments.

[0075] Based on the engine condensate drainage method provided in the above-described method embodiments, this application provides a computer-readable storage medium storing instructions that, when executed on a terminal device, cause the terminal device to perform the engine condensate drainage method described in any of the above embodiments.

[0076] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the systems or apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the descriptions are relatively simple, and relevant parts can be referred to the method section.

[0077] It should be understood that in this application, "at least one (item)" means one or more, and "more than" means two or more. "And / or" is used to describe the relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can represent three cases: only A exists, only B exists, and both A and B exist simultaneously, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (item) of a, b, or c can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0078] It should also be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0079] The steps of the methods or algorithms described in conjunction with the embodiments disclosed herein can be implemented directly by hardware, a software module executed by a processor, or a combination of both. The software module can be located in random access memory (RAM), main memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art.

[0080] 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 this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for draining engine condensate, characterized in that, The method is applied to the control equipment included in the condensate drainage system. The condensate drainage system further includes an engine intake manifold assembly. The engine intake manifold assembly includes an intake manifold assembly, a venturi tube, an intake high-pressure line, an exhaust line, a water outlet pipe, a first switching valve, and a second switching valve. The intake manifold assembly includes an intake manifold pressure regulating chamber, a condensate collection chamber, and a condensate collection pipe. The condensate collection chamber is located below the intake manifold pressure regulating chamber. One end of the condensate collection pipe is connected to the lower surface of the intake manifold pressure regulating chamber, and the other end is located within the condensate collection chamber. Inside, the condensate collection pipe is used to guide the condensate in the intake manifold pressure regulating chamber into the condensate collection chamber. The intake manifold pressure regulating chamber is connected to the first end of the venturi tube through the intake high-pressure pipeline. The intake high-pressure pipeline is equipped with the first switching valve, which is connected to the control device. The condensate collection chamber is connected to the thin tube portion of the venturi tube through the water outlet pipe. The second end of the venturi tube is connected to the external environment through the exhaust pipeline. The exhaust pipeline is equipped with the second switching valve, which is connected to the control device. The control device acquires the condensate water level in the condensate collection chamber; If the condensate water level is greater than or equal to the first water level threshold, the control device controls the second switch valve to open, so that the venturi tube is connected to the external environment; The control device acquires the pressure value inside the intake manifold pressure regulating chamber; If the difference between the pressure value inside the cavity and the atmospheric pressure value is greater than or equal to the pressure difference threshold, the control device controls the first switch valve to open, so that the gas is discharged from the intake manifold pressure regulating cavity through the intake high-pressure pipeline, the venturi tube and the exhaust pipeline. When the gas passes through the thin tube part of the venturi tube, it generates suction to draw the condensate from the condensate collection cavity through the water outlet pipe and discharge it to the external environment with the gas.

2. The method according to claim 1, characterized in that, The method further includes: If the condensate water level is less than or equal to the second water level threshold, the control device controls the first switch valve and the second switch valve to close, and the second water level threshold is less than the first water level threshold.

3. The method according to claim 1, characterized in that, The method further includes: If the condensate level is 0, the control device controls the second switch valve to close.

4. The method according to any one of claims 1-3, characterized in that, The condensate collection pipe is equipped with a one-way valve, which is used to prevent condensate from flowing back from the condensate collection chamber to the intake manifold pressure regulating chamber through the condensate collection pipe.

5. A condensate drainage system, characterized in that, The condensate drainage system includes control equipment and an engine intake manifold device. The engine intake manifold device includes an intake manifold assembly, a venturi tube, an intake high-pressure line, an exhaust line, a water outlet pipe, a first switching valve, and a second switching valve. The intake manifold assembly includes an intake manifold pressure regulating chamber, a condensate collection chamber, and a condensate collection pipe. The condensate collection chamber is located below the intake manifold pressure regulating chamber. One end of the condensate collection pipe is connected to the lower bottom surface of the intake manifold pressure regulating chamber, and the other end is located inside the condensate collection chamber. The condensate collection pipe is used to guide the condensate in the intake manifold pressure regulating chamber into the condensate collection chamber. The intake manifold pressure regulating chamber is connected to the first end of the venturi tube through the intake high-pressure pipeline. The intake high-pressure pipeline is equipped with a first switching valve, which is connected to the control device. The condensate collection chamber is connected to the thin tube portion of the venturi tube through the water outlet pipe. The second end of the venturi tube is connected to the external environment through the exhaust pipeline. The exhaust pipeline is equipped with a second switching valve, which is connected to the control device. The control device is used to obtain the condensate water level in the condensate collection chamber. If the condensate water level is greater than or equal to the first water level threshold, the second switch valve is controlled to open, so that the venturi tube is connected to the external environment. The control device is also used to obtain the pressure value inside the intake manifold pressure regulating chamber. If the difference between the pressure value inside the chamber and the atmospheric pressure is greater than or equal to the pressure difference threshold, the first switch valve is controlled to open, so that the gas is discharged from the intake manifold pressure regulating chamber through the intake high-pressure pipeline, the venturi tube and the exhaust pipeline. When the gas passes through the thin tube part of the venturi tube, it generates suction to draw the condensate from the condensate collection chamber through the outlet pipe and discharge it to the external environment with the gas.

6. The condensate drainage system according to claim 5, characterized in that, The control device is also used to control the first switch valve and the second switch valve to close if the condensate water level is less than or equal to the second water level threshold, wherein the second water level threshold is less than the first water level threshold.

7. The condensate drainage system according to claim 5, characterized in that, The control device is also used to control the second switch valve to close if the condensate water level is equal to 0.

8. The condensate drainage system according to any one of claims 5-7, characterized in that, The condensate collection pipe is equipped with a one-way valve, which is used to prevent condensate from flowing back from the condensate collection chamber to the intake manifold pressure regulating chamber through the condensate collection pipe.

9. A control device, characterized in that, include: Processor, memory, system bus; The processor and the memory are connected via the system bus; The memory is used to store one or more programs, the one or more programs including instructions that, when executed by the processor, cause the processor to perform the method for draining engine condensate according to any one of claims 1-4.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores instructions that, when executed on a terminal device, cause the terminal device to perform the engine condensate drainage method according to any one of claims 1-4.

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