Engine condensate water discharging method, condensate water discharging system and related equipment

Abstract

The invention discloses an engine condensate water discharging method, a condensate water discharging system and related equipment which are applied to the technical field of internal combustion engines, a condensate water collecting cavity is arranged on the lower portion of an air inlet manifold pressure stabilizing cavity, condensate water is collected based on the gravity effect, and the condensate water entering an air cylinder of an engine along with air is reduced. The first switch valve and the second switch valve are controlled by the control equipment, and under the condition that the first switch valve and the second switch valve are both opened, gas is exhausted from the gas inlet manifold pressure stabilizing cavity through the gas inlet high-pressure pipeline, the Venturi tube and the gas exhaust pipeline. When gas passes through the thin tube part of the Venturi tube, suction force is generated based on the Venturi effect to suck condensate water out of the condensate water collecting cavity, and the condensate water is discharged to the external environment along with the gas. Therefore, on the basis of reducing the adjustment of the structure of the intake manifold, the condensate water generated in the intake system can be collected and discharged to the external environment, and the problem that the engine is on fire due to the fact that the condensate water enters the air cylinder is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of internal combustion engines, in particular to a method for discharging condensate water of an engine, a condensate water discharge system and related equipment. BACKGROUND

[0002] The intake system of the engine adopts Exhaust Gas Re-circulation (EGR) technology and water-cooled intercooling technology to reduce fuel consumption and reduce emissions. The EGR technology mainly refers to the technology of guiding a part of the exhaust gas after combustion into the air intake side to make the internal combustion engine inhale again, which can reduce nitrogen oxides in vehicle exhaust gas and improve fuel economy. The water-cooled intercooling technology is an intercooling system that dissipates heat with the help of water. During the process of engine intake, the gas is easily affected by low temperature when flowing through the pipeline and the intercooling system, and condensate water is generated. The condensate water will enter the cylinder of the engine with the gas through the multiple intake manifolds included in the intake system.

[0003] The intake manifold is affected by arrangement, installation and cylinder head intake duct matching design, etc. The process of condensate water entering the manifold pressure stabilization chamber included in the intake system and then entering each manifold is relatively complex, and it is difficult to uniformly distribute the generated condensate water by changing the structure of the intake manifold. A large amount of condensate water may enter the same cylinder, resulting in engine misfire.

[0004] At present, there is a lack of effective method for handling condensate water in the intake system of the engine. SUMMARY

[0005] Therefore, the present application provides a method for discharging condensate water of an engine, a condensate water discharge system and related equipment, which can effectively reduce the problem of engine misfire caused by condensate water entering the cylinder.

[0006] The technical solutions provided by the present application are as follows:

[0007] In a first aspect, the application provides a method for discharging condensate water of an engine, which is applied to a control device included in a condensate water discharge system, the condensate water discharge system further including an engine intake manifold device, the engine intake manifold device including an intake manifold assembly, a Venturi tube, an intake high-pressure pipeline, an exhaust pipeline, a water outlet pipeline, a first switch valve and a second switch valve, the intake manifold assembly including an intake manifold pressure stabilization chamber, a condensate water collection chamber and a condensate water collection pipeline, the condensate water collection chamber being located below the intake manifold pressure stabilization chamber, one end of the condensate water collection pipeline being connected to the lower bottom surface of the intake manifold pressure stabilization chamber and the other end being located in the condensate water collection chamber, the condensate water collection pipeline being used to guide the condensate water in the intake manifold pressure stabilization chamber into the condensate water collection chamber, the intake manifold pressure stabilization chamber being connected to the first end of the Venturi tube through the intake high-pressure pipeline, the intake high-pressure pipeline being provided with the first switch valve, the first switch valve being connected to the control device, the condensate water collection chamber being connected to the thin tube part of the Venturi tube through the water outlet pipeline, the second end of the Venturi tube being connected to the external environment through the exhaust pipeline, the exhaust pipeline being provided with the second switch valve, the second switch valve being connected to the control device;

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

[0009] If the condensate water level is greater than or equal to a first water level threshold value, the control device controls the second switch valve to be opened, so that the Venturi tube is connected to the external environment.

[0010] The control device acquires the internal chamber pressure value of the intake manifold pressure stabilization chamber;

[0011] If the difference between the internal chamber pressure value and the atmospheric pressure value is greater than or equal to a pressure difference threshold value, the control device controls the first switch valve to be opened, so that the gas is discharged from the intake manifold pressure stabilization chamber through the intake high-pressure pipeline, the Venturi tube and the exhaust pipeline, and the condensate water is sucked out of the condensate water collection chamber through the water outlet pipeline by the suction force generated by the gas when passing through the thin tube part of the Venturi tube and is discharged to the external environment with the gas.

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

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

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

[0015] If the condensate water level is equal to 0, the control device controls the second switch valve to be closed.

[0016] In a possible implementation, the condensate water collection pipe is provided with a one-way valve for preventing the condensate water from flowing back to the intake manifold plenum through the condensate water collection pipe from the condensate water collection chamber.

[0017] In a second aspect, the present application provides a condensate water discharge system, which comprises a control device and an engine intake manifold device, and the engine intake manifold device comprises an intake manifold assembly, a Venturi tube, an intake high-pressure pipeline, an exhaust pipeline, a water outlet pipe, a first switch valve and a second switch valve.

[0018] The intake manifold assembly comprises an intake manifold plenum, a condensate water collection chamber and a condensate water collection pipe, the condensate water collection chamber is located below the intake manifold plenum, one end of the condensate water collection pipe is connected with the lower bottom surface of the intake manifold plenum, and the other end is located in the condensate water collection chamber, the condensate water collection pipe is used for guiding the condensate water in the intake manifold plenum into the condensate water collection chamber, the intake manifold plenum is connected with the first end of the Venturi tube through the intake high-pressure pipeline, the intake high-pressure pipeline is provided with the first switch valve, the first switch valve is connected with the control device, the condensate water collection chamber is connected with the thin tube part of the Venturi tube through the water outlet pipe, the second end of the Venturi tube is connected with the external environment through the exhaust pipeline, the exhaust pipeline is provided with the second switch valve, and the second switch valve is connected with the control device.

[0019] The control device is used for acquiring the condensate water level of the condensate water collection chamber, and if the condensate water level is greater than or equal to a first water level threshold value, the control device controls the second switch valve to be opened, so that the Venturi tube is connected with the external environment.

[0020] The control device is also used for acquiring the internal pressure value of the intake manifold plenum, and if the difference between the internal pressure value and the atmospheric pressure value is greater than or equal to a pressure difference threshold value, the control device controls the first switch valve to be opened, so that the gas is discharged from the intake manifold plenum through the intake high-pressure pipeline, the Venturi tube and the exhaust pipeline, and the gas generates suction when passing through the thin tube part of the Venturi tube, so that the condensate water is sucked out from the condensate water collection chamber through the water outlet pipe and discharged to the external environment with the gas.

[0021] In a possible implementation, the control device is also used for controlling the first switch valve to be closed and the second switch valve to be closed if the condensate water level is less than or equal to a second water level threshold value, and the second water level threshold value is less than the first water level threshold value.

[0022] In a possible implementation, the control device is further configured to control the second switch valve to be closed if the condensed water level is equal to 0.

[0023] In a possible implementation, the condensed water collection pipe is provided with a one-way valve configured to prevent condensed water from flowing back to the intake manifold pressure chamber from the condensed water collection cavity through the condensed water collection pipe.

[0024] In a third aspect, the present application provides a control device, comprising: a processor, a memory, a system bus;

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

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

[0027] In a fourth aspect, the present application provides a computer-readable storage medium, the computer-readable storage medium storing instructions, when the instructions run on a terminal device, cause the terminal device to perform the method of any of the embodiments of the first aspect.

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

[0029] The present application provides an engine condensed water discharge method, a condensed water discharge system and related devices. A condensed water collection cavity is arranged at the lower part of the intake manifold pressure chamber. Condensed water is collected from the condensed water collection cavity based on gravity, thereby reducing the condensed water entering the cylinder along with the gas. The opening or closing of the first switch valve and the second switch valve is controlled by the control device. When both the first switch valve and the second switch valve are opened, the gas is discharged from the intake manifold pressure chamber through the intake high-pressure pipeline, the Venturi tube and the exhaust pipeline. Based on the Venturi effect, the flow rate of the gas increases when the gas flows through the thin tube part of the Venturi tube. The condensed water is sucked out of the condensed water collection cavity through the water outlet pipe by the suction force generated in the thin tube part, and is discharged to the external environment along with the gas. In this way, the condensed water generated in the intake system can be collected and discharged to the external environment without adjusting the structure of the intake manifold, thereby reducing the engine misfire problem caused by the condensed water entering the cylinder. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 A structural schematic diagram of a condensed water discharge system provided by an embodiment of the present application;

[0031] Figure 2Another structure schematic view of a condensed water discharge system provided by the embodiment of the present application is provided.

[0032] Figure 3 A flow schematic view of an engine condensed water discharge method provided by the embodiment of the present application is provided.

[0033] Figure 4 A flow schematic view of another engine condensed water discharge method provided by the embodiment of the present application is provided. DETAILED DESCRIPTION

[0034] In order to facilitate understanding and explaining the technical solutions provided by the embodiments of the present application, the background art of the present application will be described first.

[0035] In order to reduce emissions and make full use of fuel, the engine of the vehicle adopts EGR and water-cooled intercooling technology. The intake system of the engine will compress fresh air and exhaust gas generated after the last combustion as the gas for this combustion. However, the temperature of the exhaust gas is relatively high, and in the process of passing through the intake system, the temperature of the gas may be lower than the temperature of the surrounding environment, resulting in condensed water. The condensed water will flow into the cylinder along the intake manifold of the intake system.

[0036] The intake manifold of the intake system is designed according to the uniformity and mixing of the exhaust gas and air, and the uniformity of the condensed water is not considered, so it is difficult to avoid the problem that a large amount of condensed water flows into the cylinder, resulting in that the cylinder cannot be normally combusted, and eventually leading to the engine misfire. Moreover, the structure of the intake manifold is relatively complex. The process of the condensed water flowing through the intake manifold along with the gas is also relatively complex, and it is difficult to make the condensed water uniformly flow to each cylinder by optimizing the structure of the intake manifold. At present, there is a lack of effective method for handling the condensed water in the intake system of the engine.

[0037] Based on this, the embodiment of the present application provides a condensate water discharge system, which comprises an engine intake manifold device and a control device. The engine intake manifold device comprises an intake manifold assembly, a Venturi tube, an intake high-pressure pipeline, an exhaust pipeline, a water outlet pipe, a first switch valve and a second switch valve. The intake manifold assembly comprises an intake manifold pressure stabilization chamber, a condensate water collection chamber and a condensate water collection pipe. The condensate water collection chamber is located below the intake manifold pressure stabilization chamber, so that the condensate water can be collected through the condensate water collection pipe under the action of gravity. One end of the condensate water collection pipe is connected with the lower bottom surface of the intake manifold pressure stabilization chamber, and the other end is located in the condensate water collection chamber. The condensate water collection pipe is used to guide the condensate water in the intake manifold pressure stabilization chamber into the condensate water collection chamber. The intake manifold pressure stabilization chamber is connected with the first end of the Venturi tube through the intake high-pressure pipeline. The intake high-pressure pipeline is provided with the first switch valve. The first switch valve is connected with the control device. The condensate water collection chamber is connected with the thin tube part of the Venturi tube through the water outlet pipe. The second end of the Venturi tube is connected with the external environment through the exhaust pipeline. The exhaust pipeline is provided with the second switch valve. The second switch valve is connected with the control device.

[0038] By controlling the opening or closing of the first switch valve and the second switch valve by the control device, the gas can be discharged from the intake manifold pressure stabilization chamber through the intake high-pressure pipeline, the Venturi tube and the exhaust pipeline when the first switch valve and the second switch valve are both opened. When the gas passes through the thin tube part of the Venturi tube, the flow rate of the gas is accelerated based on the Venturi effect, and the condensate water is sucked out of the condensate water collection chamber through the water outlet pipe by the suction force generated in the thin tube part, and then discharged to the external environment with the gas. In this way, the condensate water generated in the intake system can be collected and discharged to the external environment on the basis of reducing the adjustment of the structure of the intake manifold, and the problem of engine misfire caused by the condensate water entering the cylinder can be reduced.

[0039] In order to facilitate understanding of the technical solutions provided by the embodiments of the present application, the condensate water discharge system provided by the embodiments of the present application will be described below with reference to the drawings.

[0040] Referring to Figure 1 , the figure is a structural schematic diagram of a condensate water discharge system provided by an embodiment of the present application.

[0041] The condensate water discharge system 100 comprises a control device 110 and an engine intake manifold device 120.

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

[0043] The engine intake manifold device 120 comprises an intake manifold assembly 121, a Venturi tube 122, an intake high-pressure pipeline 123, an exhaust pipeline 124, a water outlet pipeline 125, a first switch valve 126 and a second switch valve 127.

[0044] The intake manifold assembly 121 comprises an intake manifold constant pressure chamber 1211, a condensed water collecting chamber 1212 and a condensed water collecting pipeline 1213. The condensed water collecting chamber 1212 is located below the intake manifold constant pressure chamber 1211. The condensed water collecting chamber 1212 is located at the lowest point of the whole intake system so as to collect condensed water under the action of gravity and reduce condensed water entering the cylinder of the engine with gas. In addition, as an example, the bottom plane of the condensed water collecting chamber 1212 is parallel to the horizontal plane to ensure the level of the condensed water and facilitate the control device 110 to obtain a more accurate condensed water level.

[0045] One end of the condensed water collecting pipeline 1213 is connected to the lower bottom surface of the intake manifold constant pressure chamber 1211 and the other end is located in the condensed water collecting chamber 1212. The condensed water collecting pipeline 1213 is used to guide the condensed water in the intake manifold constant pressure chamber 1211 into the condensed water collecting chamber 1212 under the action of gravity. The condensed water collecting pipeline 1213 has a certain length and the outlet of the condensed water collecting pipeline 1213, that is, the port in the condensed water collecting chamber 1212, is located at a height less than a height threshold from the bottom plane of the condensed water collecting chamber 1212. In this way, after a certain amount of condensed water is stored in the condensed water collecting chamber 1212, the outlet of the condensed water collecting pipeline 1213 is submerged, realizing the isolation of gas by condensed water, avoiding the gas in the intake manifold constant pressure chamber 1211 from being discharged through the condensed water collecting pipeline 1213 and preventing the gas in the Venturi tube 122 from entering the intake manifold constant pressure chamber 1211, thereby playing a certain sealing role.

[0046] The intake manifold constant pressure chamber 1211 is connected to the first end of the Venturi tube 122 through the intake high-pressure pipeline 123. The intake high-pressure pipeline 123 is provided with the first switch valve 126. The first switch valve 126 is connected to the control device 110. The first switch valve 126 is opened and closed under the control of the control device 110 to adjust whether the gas in the intake high-pressure pipeline 123 flows.

[0047] The condensed water collecting chamber 1212 is connected to the thin tube part of the Venturi tube 122 through the water outlet pipeline 125. The second end of the Venturi tube 122 is connected to the external environment through the exhaust pipeline 124. The exhaust pipeline 124 is provided with the second switch valve 127. The second switch valve 127 is connected to the control device 110. The second switch valve 127 is opened and closed under the control of the control device 110 to adjust whether the Venturi tube 122 is in communication with the external environment.

[0048] The control device 110 is configured to acquire the condensate water level of the condensate water collection cavity 1212, and control the second switch valve 127 to open or close according to the condensate water level. The control device 110 is also configured to acquire the cavity internal pressure value of the intake manifold pressure maintaining cavity 1211, and control the first switch valve 126 to open or close according to the difference between the cavity internal pressure value and the atmospheric pressure value. The specific functions of the control device 110 will be described below in the specific description of the engine condensate water discharge method.

[0049] By controlling the opening or closing of the first switch valve 126 and the second switch valve 127 by the control device 110, the gas can be discharged from the intake manifold pressure maintaining cavity 1211, through the intake high-pressure pipeline 123, the Venturi tube 122 and the exhaust pipeline 124 when both the first switch valve 126 and the second switch valve 127 are open. When the gas passes through the thin tube part of the Venturi tube 122, the flow rate of the gas increases based on the Venturi effect, and the condensate water is sucked out of the condensate water collection cavity 1212 through the water outlet pipe 125 by the suction force generated in the thin tube part of the Venturi tube 122, and is discharged to the external environment with the gas. In this way, the condensate water generated in the intake system can be collected and discharged to the external environment on the basis of reducing the adjustment to the structure of the intake manifold, and the problem of engine misfire caused by the condensate water entering the cylinder can be reduced.

[0050] In addition, in a possible implementation, as shown in Figure 2 , which is a structural schematic diagram of another condensate water discharge system provided by the embodiment of the present application. The condensate water collection pipe 1213 is provided with a one-way valve 1214. The one-way valve 1214 is configured to control the flow of condensate water from the intake manifold pressure maintaining cavity 1211 to the condensate water collection cavity 1212, and prevent the condensate water from flowing back from the condensate water collection cavity 1212 to the intake manifold pressure maintaining cavity 1211 through the condensate water collection pipe 1213. The one-way valve 1214 can control the flow direction of the condensate water, prevent the condensate water from flowing back, help the condensate water collection cavity 1212 to collect the condensate water in the intake manifold, realize the control of the flow direction of the condensate water, and also facilitate the suction of the condensate water from the condensate water collection cavity 1212 to the external environment, and reduce the condensate water from entering the cylinder and affecting the normal operation of the engine.

[0051] Specifically, the embodiment of the present application provides an engine condensate water discharge method applied to a control device 110 included in a condensate water discharge system. As shown in Figure 3 , which is a flowchart of an engine condensate water discharge method provided by the embodiment of the present application. As shown in Figure 3 , the engine condensate water discharge method provided by the embodiment of the present application includes S301-S304.

[0052] S301: The control device 110 acquires the condensate water level of the condensate water collection cavity 1212.

[0053] The condensate water level in the condensate water collection cavity 1212 changes with the condensate water collection condition. The control device 110 acquires the condensate water level of the condensate water collection cavity 1212 to determine whether the condensate water needs to be drained.

[0054] The embodiments of the present application do not limit the specific implementation of the control device 110 acquiring the condensate water level. As an example, a water level detection device is arranged in the condensate water collection cavity 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 water collection cavity 1212. The water level detection device can detect the condensate water level in the condensate water collection cavity 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 periodically detects the condensate water level in the condensate water collection cavity 1212 and periodically sends the detected condensate water level to the control device 110. As another example, a sensor is arranged at a specific water level in the condensate water collection cavity 1212. When the condensate water level in the condensate water collection cavity 1212 reaches the specific 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 sending 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 water level threshold that is pre-set to trigger the opening of the second switch valve 127. The first water level threshold can be set based on the requirement of absorbing condensate water from the condensate water collection cavity 1212. The value of the first water level threshold affects the frequency of absorbing condensate water. As an example, the value of the first water level threshold ranges between the water level in the condensate water collection cavity 1212 corresponding to the position of the water outlet of the condensate water collection pipe 1213 and the water level corresponding to the position of the drain pipe 125.

[0057] The control device 110 compares the acquired condensate water level with the first water level threshold. If the condensate water level is greater than or equal to the first water level threshold, it means 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 instruction to the second switch valve 127. The second switch valve 127 performs an opening action after acquiring the opening instruction. After the second switch valve 127 is opened, the Venturi tube 122 is connected to the external environment through the exhaust pipe 124. The air pressure of the Venturi tube 122 is the air pressure of the external environment, that is, the atmospheric pressure.

[0058] S303: The control device 110 acquires the cavity pressure value of the intake manifold plenum 1211.

[0059] The cavity pressure value of the intake manifold plenum 1211 changes with the gas entering condition in the intake manifold plenum 1211.

[0060] The embodiments of the present application do not limit the specific implementation of the control device 110 acquiring the cavity pressure value of the intake manifold plenum 1211. As an example, a pressure detection device is arranged in the intake manifold plenum 1211. The pressure detection device is, for example, a pressure sensor. The pressure detection device detects the pressure in the intake manifold plenum 1211 and sends the obtained cavity pressure value to the control device 110. The pressure detection device can detect the pressure in the intake manifold plenum 1211 in real time and send the detected cavity pressure value to the control device 110 in real time. Alternatively, the pressure detection device detects the pressure in the intake manifold plenum 1211 periodically and sends the detected cavity pressure value to the control device 110 periodically.

[0061] The embodiments of the present application also do not limit the execution order of S302 and S303. In a possible implementation scenario, the control device 110 can execute S303 after executing S302. That is, the control device 110 acquires 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 while executing S301 and S302. That is, the process of acquiring 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 acquiring the cavity pressure value of the intake manifold plenum 1211.

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

[0063] The control device 110 calculates the difference between the acquired cavity pressure value and the pressure value of the Venturi tube 122, that is, the atmospheric pressure value. The difference can reflect the gap between the pressure in the intake manifold plenum 1211 and the pressure of the Venturi tube 122. The difference can affect the flow rate of the gas from the intake manifold plenum 1211 through the intake high-pressure pipeline 123, the Venturi tube 122 and the exhaust pipeline 124, and thus affect the size of the suction force generated by the gas passing through the Venturi tube 122.

[0064] If the difference between the cavity pressure value and the atmospheric pressure value is greater than or equal to the pressure difference threshold value, sufficient suction can be generated to suck the condensed water out of the condensed water collection cavity 1212. The control device 110 controls the first switch valve 126 to open. As an example, the control device 110 sends an opening instruction to the first switch valve 126. After obtaining the opening instruction, the first switch valve 126 performs an opening action. After the first switch valve 126 opens, under the influence of the difference between the cavity pressure value and the atmospheric pressure value, the gas is discharged from the intake manifold pressure cavity 1211 to the outside environment at a certain flow rate through the intake high-pressure pipeline 123, the Venturi tube 122 and the exhaust pipeline 124, and generates suction in the fine tube part of the Venturi tube 122 to suck the condensed water out of the condensed water collection cavity 1212 through the water outlet pipe 125 and discharge it to the outside environment together with the gas.

[0065] In this way, the condensed water can be extracted from the condensed water collection cavity 1212 and discharged to the outside environment based on the water level of the condensed water and the difference between the cavity pressure value and the atmospheric pressure value. By using a relatively simple device, the condensed water generated in the intake system can be collected and discharged, reducing the influence of the condensed water on the operation of the engine and reducing the problem of engine misfire caused by the condensed water entering the cylinder.

[0066] Further, in some possible implementation scenarios, during the process of discharging the condensed water from the condensed water collection cavity 1212, it is necessary to retain part of the condensed water in the condensed water collection cavity 1212 so as to flush out the water pipe 125, the Venturi tube 122 and the exhaust pipeline 124 with the retained part of the condensed water next time the condensed water is discharged, preventing particulate matter contained in the gas from blocking the pipeline.

[0067] A second water level threshold value is set in advance. The second water level threshold value is less than the first water level threshold value. The second water level threshold value is used to trigger the closing of the first switch valve 126 and the second switch valve 127. The control device 110 compares the obtained condensed water level with the second water level threshold value. If the condensed water level is less than or equal to the second water level threshold value, the condensed water does not need to be discharged, and the first switch valve 126 and the second switch valve 127 are controlled to close until the condensed water level is greater than or equal to the first water level threshold value, and then the second switch valve 127 is controlled to open. As an example, the control device 110 sends a closing instruction to the first switch valve 126 and the second switch valve 127 respectively. After obtaining the closing instruction, the first switch valve 126 and the second switch valve 127 perform a closing action.

[0068] In addition, the condensed water collected in the condensed water collection cavity 1212 can also evaporate. For example, in the case of long-term parking of the vehicle, the condensed water collected in the condensed water collection cavity 1212 can evaporate.

[0069] The control device 110 acquires the condensate water level. If the condensate water level is equal to 0, it indicates that there is no condensate water in the condensate water collection cavity 1212, the condensate water is not collected, or the condensate water has evaporated. The control device 110 controls the second switch valve 127 to close to prevent the gas in the intake manifold pressure maintaining cavity 1211 from being discharged to the outside environment through the condensate water collection pipe 1213, the condensate water collection cavity 1212, the water outlet pipe 125, the Venturi tube 122, and the exhaust pipe 124. As an example, the control device 110 sends a closing instruction to the second switch valve 127. After acquiring the closing instruction, the second switch valve 127 performs a closing action.

[0070] The following provides a flowchart of a method for discharging condensate water of an engine with the control device 110 as an ECU as an example, as shown in Figure 4

[0071] The ECU acquires the condensate water level of the condensate water collection cavity 1212 in real time. It is determined whether the currently acquired condensate water level is 0. If the condensate water level is 0, the ECU controls the second switch valve 127 to close. If the condensate water level is not 0, it is determined whether the currently acquired condensate water level is greater than or equal to a first water level threshold H1. If the condensate water level is greater than or equal to the first water level threshold H1, the ECU controls the second switch valve 127 to open. Further, the ECU acquires the cavity internal pressure value of the intake manifold pressure maintaining cavity 1211. The ECU determines the pressure difference between the two ends of the Venturi tube 122, that is, the difference between the cavity internal pressure value of the intake manifold pressure maintaining cavity 1211 and the atmospheric pressure value. It is determined whether 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 controls the first switch valve 126 to open. The ECU acquires the condensate water level of the condensate water collection cavity 1212 in real time. The ECU determines whether the currently acquired condensate water level is less than or equal to a second water level threshold. If the condensate water level is less than or equal to the second water level threshold, the ECU controls the first switch valve 126 and the second switch valve 127 to close.

[0072] Based on the method embodiment described above, the application provides a control device, comprising: a processor, a memory, and a system bus;

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

[0074] The memory is used to store one or more programs, and the one or more programs include instructions which, when executed by the processor, cause the processor to perform the method for discharging condensate water of an engine according to any one of the embodiments described above.

[0075] ​Based on the engine condensate water discharge method provided in the above method embodiments, the application provides a computer readable storage medium, wherein instructions are stored in the computer readable storage medium, and when the instructions are run on a terminal device, the terminal device executes the engine condensate water discharge method according to any one of the above embodiments.

[0076] It should be noted that the various embodiments herein are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts of each embodiment can be referred to each other. For the system or device disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple, and the relevant parts are described in the method part.

[0077] It should be understood that in the present application, "at least one" means one or more, and "multiple" means two or more. "And / or" is used to describe the association relationship of the associated objects, which means that there can be three relationships, for example, "A and / or B" can mean that there are three cases of only A, only B and A and B at the same time, and A and B can be singular or plural. The character " / " generally represents that the associated objects before and after are in an "or" relationship. "At least one of the following" or the like means any combination of these items, including any combination of single item or multiple items. For example, at least one of a, b or c can mean 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 paper, relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0079] The steps of a method or algorithm described in connection with the embodiments disclosed herein can be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module can reside in random access memory (RAM), flash memory, read-only memory (ROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such that the processor can read information from, and

[0080] The above description of disclosed embodiments is intended to be illustrative and not restrictive. Many embodiments of the application will be apparent to those of skill in the art upon reviewing the above description. The scope of the application should, therefore, be determined not with reference to the above description, but instead should be determined with reference to the appended claims, along with their full scope of equivalents.

Claims

1. An engine condensate water discharge method characterized by, The method is applied to a control device included in a condensate water discharge system, the condensate water discharge system further including an engine intake manifold device, the engine intake manifold device including an intake manifold assembly, a Venturi tube, an intake high-pressure pipeline, an exhaust pipeline, a water outlet pipeline, a first switch valve and a second switch valve, the intake manifold assembly including an intake manifold constant pressure chamber, a condensate water collection chamber and a condensate water collection pipeline, the condensate water collection chamber being located below the intake manifold constant pressure chamber, one end of the condensate water collection pipeline being connected with the lower bottom surface of the intake manifold constant pressure chamber and the other end being located in the condensate water collection chamber, the condensate water collection pipeline being used to guide the condensate water in the intake manifold constant pressure chamber into the condensate water collection chamber, the intake manifold constant pressure chamber being connected with the first end of the Venturi tube through the intake high-pressure pipeline, the intake high-pressure pipeline being provided with the first switch valve, the first switch valve being connected with the control device, the condensate water collection chamber being connected with the thin tube part of the Venturi tube through the water outlet pipeline, the second end of the Venturi tube being connected with the external environment through the exhaust pipeline, the exhaust pipeline being provided with the second switch valve, the second switch valve being connected with the control device; The control device acquires the condensate water level of the condensate water collection chamber; If the condensate water level is greater than or equal to a first water level threshold value, the control device controls the second switch valve to be opened, so that the Venturi tube is connected with the external environment; The control device acquires the cavity internal pressure value of the intake manifold constant pressure chamber; If the difference between the cavity internal pressure value and the atmospheric pressure value is greater than or equal to a pressure difference threshold value, the control device controls the first switch valve to be opened, so that the gas is discharged from the intake manifold constant pressure chamber through the intake high-pressure pipeline, the Venturi tube and the exhaust pipeline, and the condensate water is sucked out of the condensate water collection chamber through the water outlet pipeline by the suction force generated by the gas when passing through the thin tube part of the Venturi tube and is discharged to the external environment with the gas.

2. The method of claim 1, wherein, The method further includes: If the condensate water level is less than or equal to a second water level threshold value, the control device controls the first switch valve and the second switch valve to be closed, the second water level threshold value being less than the first water level threshold value.

3. The method of claim 1, wherein, The method further includes: If the condensate water level is equal to 0, the control device controls the second switch valve to be closed.

4. The method according to any one of claims 1 to 3, characterized in that, The condensate water collection pipeline is provided with a one-way valve, the one-way valve being used to prevent the condensate water from flowing back to the intake manifold constant pressure chamber from the condensate water collection chamber through the condensate water collection pipeline.

5. A condensate drain system characterized by, The condensate water discharge system includes a control device and an engine intake manifold device, the engine intake manifold device including an intake manifold assembly, a Venturi tube, an intake high-pressure pipeline, an exhaust pipeline, a water outlet pipeline, a first switch valve and a second switch valve; The intake manifold assembly comprises an intake manifold plenum, a condensate collection chamber below the intake manifold plenum, and a condensate collection pipe having one end connected to the lower bottom surface of the intake manifold plenum and the other end located in the condensate collection chamber, the condensate collection pipe being used to guide the condensate in the intake manifold plenum into the condensate collection chamber, the intake manifold plenum being connected to the first end of the Venturi tube through the intake high-pressure pipe, the intake high-pressure pipe being provided with the first on-off valve, the first on-off valve being connected to the control device, the condensate collection chamber being connected to the thin tube part of the Venturi tube through the water outlet pipe, the second end of the Venturi tube being connected to the external environment through the exhaust pipe, the exhaust pipe being provided with the second on-off valve, the second on-off valve being connected to the control device. The control device is used to acquire the condensate level of the condensate collection chamber, and if the condensate level is greater than or equal to a first water level threshold, the second on-off valve is controlled to be opened, so that the Venturi tube is connected to the external environment. The control device is also used to acquire the plenum pressure value of the intake manifold plenum, and if the difference between the plenum pressure value and the atmospheric pressure value is greater than or equal to a pressure difference threshold, the first on-off valve is controlled to be opened, so that the gas is discharged from the intake manifold plenum through the intake high-pressure pipe, the Venturi tube and the exhaust pipe, and the condensate is sucked out of the condensate collection chamber through the water outlet pipe by the suction force generated by the gas when passing through the thin tube part of the Venturi tube, and then discharged to the external environment with the gas.

6. The condensed water drain system according to claim 5, wherein The control device is also used to control the first on-off valve to be closed and the second on-off valve to be closed if the condensate level is less than or equal to a second water level threshold, the second water level threshold being less than the first water level threshold.

7. The condensed water drain system according to claim 5, wherein The control device is also used to control the second on-off valve to be closed if the condensate level is equal to 0.

8. The condensate drain system of any of claims 5-7, wherein, The condensate collection pipe is provided with a one-way valve, which is used to prevent the condensate from flowing back to the intake manifold plenum from the condensate collection chamber through the condensate collection pipe.

9. A control device, characterized by It comprises: a processor, a memory, and a system bus; the processor and the memory are connected through the system bus; the memory is used to store one or more programs, the one or more programs comprising instructions which, when executed by the processor, cause the processor to perform the engine condensate discharge method of any one of claims 1-4.

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

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