Low-pressure EGR condensate water eliminating method, device, equipment, storage medium and product

Abstract

The invention discloses a low-pressure EGR condensate water elimination method, device and equipment, a storage medium and a product, relates to the technical field of condensate water elimination, and discloses a low-pressure EGR condensate water elimination method which comprises the steps that the current operation working condition of an engine is detected; when the current operation working condition is the condensate water generation working condition, the operation duration of the engine in the condensate water generation working condition is recorded; and when the operation duration reaches a first preset duration, an engine is reversely dragged through a generator to generate negative pressure, and the condensate water is sucked into an air cylinder to be eliminated. According to the method, the working condition that condensate water of the low-pressure EGR system is easily generated is recognized, and the condensate water is sucked into the air cylinder to be eliminated in a more non-inductive mode.

Description

Technical Field

[0001] The present invention relates to the technical field of condensed water elimination, and in particular to a method, device, equipment, storage medium and product for eliminating low-pressure EGR condensed water. Background Art

[0002] The existing technology is to identify the working conditions that may produce a large amount of condensed water, and then control the throttle changes to form a negative pressure in the intake manifold, so as to suck the condensed water into the cylinder for combustion, thereby achieving the purpose of eliminating the condensed water. However, when the strategy is actually implemented, some condensed water has already accumulated. The condensed water sucked into the cylinder will still cause varying degrees of combustion instability, speed jitter or misfire during combustion in the cylinder, affecting the driver's driving experience and driving safety.

[0003] The above contents are only used to assist in understanding the technical solution of the present invention and do not constitute an admission that the above contents are prior art. Summary of the invention

[0004] The main purpose of the present invention is to provide a low-pressure EGR condensate elimination method, device, equipment, storage medium and product, aiming to solve the problem that a part of condensate has already accumulated in the prior art. The condensate is sucked into the cylinder and still causes different degrees of combustion instability, speed jitter or misfire during combustion in the cylinder, affecting the driver's driving experience and driving safety technical issues.

[0005] To achieve the above object, the present invention proposes a method for eliminating low-pressure EGR condensed water, the method comprising:

[0006] Detect the current operating condition of the engine;

[0007] When the current operating condition is a condensed water generating condition, recording the operating time of the engine in the condensed water generating condition;

[0008] When the running time reaches a first preset time, the generator reverses the engine to generate negative pressure, and the condensed water is sucked into the cylinder for elimination.

[0009] In one embodiment, the step of detecting the current operating condition of the engine specifically includes:

[0010] Get the engine's intake manifold temperature and EGR status;

[0011] When it is detected that the EGR is in an activated state and the intake manifold temperature is less than a preset temperature threshold, the current operating condition of the engine is determined to be a condensed water generating condition.

[0012] In one embodiment, before the step of detecting the current operating condition of the engine, the following steps are included:

[0013] Acquiring the engine operating status;

[0014] When the engine operating state does not change within the first preset time period, the process of detecting the current operating condition of the engine is executed.

[0015] In one embodiment, when the current operating condition is a condensed water generating condition, before the step of recording the operating time of the engine in the condensed water generating condition, the step includes:

[0016] Obtain engine speed and intake air flow;

[0017] Determining an operating point and a time weighting coefficient of a condensate generation operating condition according to the engine speed and the intake air flow rate;

[0018] Obtaining the running time by using the time weighting coefficient;

[0019] The first preset time duration is obtained through the operating point of the condensed water generation condition.

[0020] In one embodiment, when the running time reaches a first preset time, the step of generating negative pressure by reversely dragging the engine by the generator to absorb the condensed water into the cylinder for elimination specifically includes:

[0021] Obtaining a second preset time duration for eliminating condensed water in the intake manifold by looking up a table;

[0022] When it is detected that the operating time is less than a second preset time, the engine enters a fuel cut-off mode, the generator reverses the engine to generate negative pressure, sucks the generated condensed water into the cylinder for elimination, and turns off the EGR.

[0023] In one embodiment, when the running time reaches a first preset time, after the step of generating negative pressure by reversely dragging the engine by the generator to absorb the condensed water into the cylinder for elimination, the method includes:

[0024] When it is detected that the operating time is greater than a second preset time, the engine exits the fuel cut-off mode, the operation returns to normal, and the EGR returns to the normal control mode.

[0025] In addition, to achieve the above-mentioned purpose, the present application also proposes a screen display device, the device comprising:

[0026] A detection module, used to detect the current operating condition of the engine;

[0027] A control module, configured to record the operating time of the engine in the condensed water generating condition when the current operating condition is the condensed water generating condition;

[0028] The execution module is used to generate negative pressure by reversely dragging the engine through the generator when the operating time reaches a first preset time, so as to suck the condensed water into the cylinder for elimination.

[0029] In addition, to achieve the above-mentioned objectives, the present invention also proposes a low-pressure EGR condensed water elimination device, which includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program is configured to implement the steps of the low-pressure EGR condensed water elimination method as described above.

[0030] In addition, to achieve the above-mentioned purpose, the present invention also proposes a storage medium, which is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, the steps of the low-pressure EGR condensate elimination method as described above are implemented.

[0031] In addition, to achieve the above-mentioned purpose, the present invention also provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, the steps of the low-pressure EGR condensed water elimination method as described above are implemented.

[0032] One or more technical solutions proposed in the present invention have at least the following technical effects:

[0033] The present invention first detects the current motion condition of the engine; when it is confirmed that the current motion condition of the engine is to produce condensed water, the operating time of the engine in the condition of producing condensed water is recorded; when the operating time reaches a first preset time, the generator is used to reverse the engine to generate negative pressure, and the condensed water is sucked into the cylinder for elimination. Because the present invention detects the condensed water condition of the engine in advance when eliminating the condensed water, and then uses the generator to reverse the engine to generate negative pressure to eliminate the condensed water after detecting that condensed water is generated, compared with the prior art, the present invention will not have a part of the condensed water accumulated when the condensed water is sucked into the cylinder for elimination. Therefore, after the condensed water is sucked into the cylinder, the present invention will not cause combustion deterioration, and the driver will not feel it. Compared with other solutions, can it improve driving experience and enhance driving safety? BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0036] Figure 1 A schematic flow chart of a first embodiment of a method for eliminating low-pressure EGR condensed water according to the present invention;

[0037] Figure 2 A schematic flow chart of a second embodiment of a method for eliminating low-pressure EGR condensed water according to the present invention;

[0038] Figure 3 A schematic flow chart of a third embodiment of a method for eliminating low-pressure EGR condensed water according to the present invention;

[0039] Figure 4 A schematic flow chart of a fourth embodiment of a method for eliminating low-pressure EGR condensed water according to the present invention;

[0040] Figure 5 A first schematic flow chart of a method for eliminating low-pressure EGR condensed water provided in Embodiment 1 of the present invention;

[0041] Figure 6 A second schematic flow chart of the method for eliminating low-pressure EGR condensed water provided in the first embodiment of the present invention;

[0042] Figure 7 Schematic diagram of the module structure of the low-pressure EGR condensed water elimination device in an embodiment of the present invention;

[0043] Figure 8 Schematic diagram of the equipment structure of the hardware operating environment involved in the low-pressure EGR condensate elimination method in an embodiment of the present invention.

[0044] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments. DETAILED DESCRIPTION

[0045] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present invention and are not used to limit the present invention.

[0046] In order to better understand the technical solution of the present invention, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0047] The main solution of the embodiment of the present invention is: before eliminating the condensed water, the condensed water generation condition of the engine is detected. When the generation of condensed water is detected, the engine is reversed by the generator to generate negative pressure, and the condensed water is sucked into the cylinder for elimination, thereby avoiding the problem of unstable engine combustion, speed jitter or misfire when the system is eliminating the condensed water, which affects the driver's driving experience and driving safety.

[0048] In this embodiment, for the convenience of description, the following description will be made taking the EGR system as the execution subject.

[0049] Since the existing technology is unable to determine whether some condensed water has accumulated in the engine when the system is performing condensed water elimination, the process of condensed water elimination can easily lead to varying degrees of combustion instability, speed jitter or misfire problems during combustion in the cylinder, affecting the driver's driving experience and driving safety.

[0050] The present invention provides a solution. By identifying the working conditions where condensed water is more likely to be generated in the low-pressure EGR system, negative pressure is generated by reversely dragging the engine through the generator in a more imperceptible manner, and the condensed water is sucked into the cylinder for elimination. Therefore, compared with the existing condensed water elimination technology, the present invention will not cause different degrees of combustion instability, speed jitter or misfire problems during combustion in the cylinder, which will affect the driver's driving experience and driving safety.

[0051] It should be noted that the execution subject of the method of this embodiment can be a computing service device with low-pressure EGR condensate elimination, network communication and program running functions, and low-pressure EGR condensate elimination, such as a mobile phone, a tablet computer, a personal computer, etc., and can also be other electronic devices that achieve the same or similar functions. The following describes this embodiment and the following embodiments using the above-mentioned EGR system.

[0052] Based on this, the embodiment of the present invention provides a method for eliminating low-pressure EGR condensate water, referring to Figure 1 , Figure 1 A schematic flow chart of the first embodiment of the low-pressure EGR condensate elimination method of the present invention.

[0053] In this embodiment, the low-pressure EGR condensate elimination method includes steps S10 to S30:

[0054] Step S10, detecting the current operating condition of the engine.

[0055] It should be noted that the current operating condition of the above engine may be when the engine is in a certain state and the internal parameters are at corresponding values, and different values ​​correspond to different operating conditions.

[0056] It is understandable that the above operating conditions are different for different engines.

[0057] In a specific implementation, the current operating condition of the engine can be obtained by measuring the values ​​of the internal parameters of the engine when the engine is in a certain state.

[0058] Step S20, when the current operating condition is a condition in which condensed water is generated, recording the operating time of the engine in the condition in which condensed water is generated.

[0059] It should be noted that the condensed water operating condition may be that when various parameters in the engine reach a certain value, condensed water is generated in the engine;

[0060] It should be noted that the above-mentioned operating time may be the time during which the above-mentioned engine continues to work under the current working condition after it is detected that the above-mentioned engine produces condensed water.

[0061] It is understandable that different engines have different operating conditions for producing condensed water, and different engines have different lengths of time they continue to work after producing condensed water.

[0062] In a specific implementation, when it is detected that the current operating condition of the engine is a condition in which condensed water is generated, the operating time of the engine in the condition in which condensed water is generated is recorded, which is essentially recording the amount of condensed water accumulation.

[0063] Step S30, when the running time reaches a first preset time, negative pressure is generated by reversely dragging the engine by the generator to suck the condensed water into the cylinder for elimination.

[0064] It should be noted that the first preset time duration may be a critical time point for the EGR system to eliminate condensed water.

[0065] It is understandable that the first preset durations of different engines are different.

[0066] In a specific implementation, when the operating time reaches the first preset time, that is, the amount of condensed water accumulated in the engine has reached the standard that the system needs to be cleaned, the generator reverses the engine to generate negative pressure to suck the condensed water into the cylinder for elimination.

[0067] It should be understood that before the condensed water is sucked into the cylinder for elimination, it is necessary to monitor the generation of the condensed water in the engine to avoid the accumulation of some of the condensed water before the condensed water is removed. Under this method, compared with the existing condensed water technology, it can avoid the problems of different degrees of unstable combustion, speed jitter or misfire in the cylinder of the engine when the condensed water is eliminated, which affects the driver's driving experience and driving safety.

[0068] The present embodiment provides a method for eliminating low-pressure EGR condensed water, which detects the current operating condition of the engine as a prerequisite for determining whether condensed water is generated. When it is detected that the current operating condition is a condition that generates condensed water, the operating time of the engine in the condition that generates condensed water, that is, the amount of accumulated condensed water, is recorded. When the operating time reaches a first preset time, that is, the amount of accumulated condensed water reaches a critical value, negative pressure is generated by reversely dragging the engine by the generator, and the condensed water is sucked into the cylinder for elimination.

[0069] Based on the first embodiment of the present invention, in the second embodiment of the present invention, the same or similar contents as those in the above-mentioned embodiment 1 can be referred to the above introduction, and will not be described in detail later. Figure 2 , Figure 2 A schematic flow chart of a second embodiment of a method for eliminating low-pressure EGR condensate according to the present invention.

[0070] In this embodiment, the low-pressure EGR condensate elimination method includes steps S101 to S102:

[0071] Step S101, obtaining the intake manifold temperature of the engine and the state of EGR.

[0072] It should be noted that the intake manifold temperature may be the temperature recognized for the condensed water generating condition;

[0073] It should be noted that the state of the above-mentioned EGR may be activated or inactivated.

[0074] It is understandable that the intake manifold temperature at which condensed water is generated and the EGR state mentioned above are different for different engines.

[0075] In a specific implementation, the EGR system directly obtains the intake manifold temperature of the engine and the state of the EGR through a detection module, and feeds the information back to the EGR system.

[0076] Step S102, when it is detected that the EGR is in an activated state and the intake manifold temperature is less than a preset temperature threshold, it is determined that the current operating condition of the engine is a condensed water generating condition.

[0077] It should be noted that the above-mentioned preset temperature threshold is generally 35° C., and the above-mentioned preset temperature threshold can be confirmed through bench tests at different intake manifold temperatures.

[0078] It is understandable that the above preset temperature thresholds are different in different engines.

[0079] In a specific implementation, when it is detected that the EGR is in an activated state and the temperature in the intake manifold is lower than the preset temperature threshold, it can be determined that the current operating condition of the engine is a condition that generates condensed water.

[0080] For example, in order to help understand the implementation process of the low-pressure EGR condensate elimination method obtained by combining this embodiment with the above-mentioned embodiment 2, please refer to Figure 5 , Figure 5 The first schematic diagram of the low-pressure EGR condensate elimination method provided in Example 1 of the present application is as follows:

[0081] In a feasible implementation manner, before step S10, steps S11' to S12' may be further included:

[0082] Step S11', obtaining the engine operating status.

[0083] It should be noted that the above engine operation state can be stable operation or variable speed operation;

[0084] It is understandable that the operating conditions of different engines are different.

[0085] In a specific implementation, the EGR system directly obtains the operating status of the engine through a detection module, and feeds the information back to the EGR system.

[0086] Step S12', when the engine operating state does not change within the first preset time period, executing the process of detecting the current operating condition of the engine.

[0087] It should be noted that the above process of executing the above detection of the current operating condition of the engine is started when the operating state of the engine is stable.

[0088] It is understandable that the processes for executing the above-mentioned detection of the current operating condition of the engine are different for different engines.

[0089] In a specific implementation, when it is detected that the operating state of the engine has been in a stable state within the first preset time period, the process of detecting the current operating condition of the engine is executed.

[0090] Based on the second embodiment of the present invention, in the third embodiment of the present invention, the same or similar contents as those in the above-mentioned embodiment 1 can be referred to the above introduction, and will not be described in detail later. Figure 3 , Figure 3 A schematic flow chart of a third embodiment of a method for eliminating low-pressure EGR condensate water according to the present invention.

[0091] For example, in order to help understand the implementation process of the low-pressure EGR condensate elimination method obtained by combining this embodiment with the above-mentioned embodiment 1, please refer to Figure 5 , Figure 5 The first schematic diagram of the low-pressure EGR condensate elimination method provided in Example 1 of the present application is as follows:

[0092] In this embodiment, the low-pressure EGR condensate elimination method includes steps S201 to S204:

[0093] Step S201, obtaining engine speed and intake air flow.

[0094] It should be noted that the above engine speed can be high speed or low speed;

[0095] It should be noted that the above-mentioned intake air flow rate can be a large flow rate or a small flow rate.

[0096] It is understandable that different engines have different engine speeds and intake air flows.

[0097] In a specific implementation, the EGR system directly obtains the engine speed and the intake air flow rate through a detection module, and feeds the information back to the EGR system.

[0098] Step S202, determining the operating point and time weighting coefficient of the condensate generation condition according to the engine speed and the intake air flow.

[0099] It should be noted that the values ​​of the engine speed and the intake air flow rate are selected to form a two-dimensional table, with the value of the engine speed as the X-axis and the value of the intake air flow rate as the Y-axis;

[0100] It should be noted that the above time weighted coefficient can be obtained through the above operating point

[0101] It is understandable that the operating points of the above-mentioned condensate generation conditions and the above-mentioned time weighting coefficients of different engines are different.

[0102] In the specific implementation, the two-dimensional table consisting of the engine speed value as the X-axis and the intake flow value as the Y-axis is F k (n,m), the operating point of the above condensate generation condition is (n,m).

[0103] Step S203, obtaining the running time by using the time weighting coefficient.

[0104] It should be noted that the above-mentioned running time may be the time obtained by timing according to the above-mentioned time weighting coefficient rule.

[0105] It is understandable that the time weighting coefficient and the running time are different in different engines.

[0106] In the specific implementation, by looking up the table F k (n,m) is used to obtain the time weighting coefficient K at the operating point (n,m). The timing rule of the above operating time is to increase 1*k seconds for every 1 second.

[0107] Step S204: obtaining the first preset duration through the operating point of the condensate generation condition.

[0108] It should be noted that the first preset time duration may be a critical time point for the EGR system to eliminate condensed water.

[0109] It is understandable that the first preset durations mentioned above are different for different engines.

[0110] In the specific implementation, by looking up the table F k (n,m) to obtain the engine running time F when obvious water droplets appear in the intake manifold at this operating point (n,m) t (n,m), take F t The maximum value among (n,m) is recorded as the first preset time length t max , then t max F k (n,m) and F t The product of (n,m).

[0111] Based on the third embodiment of the present invention, in the fourth embodiment of the present invention, the same or similar contents as those in the first embodiment can be referred to the above description, and will not be described in detail later. Figure 4 , Figure 4 A schematic flow chart of a fourth embodiment of a method for eliminating low-pressure EGR condensate according to the present invention.

[0112] For example, in order to help understand the implementation process of the low-pressure EGR condensate elimination method obtained by combining this embodiment with the above-mentioned embodiment 3, please refer to Figure 6 , Figure 6 A second simplified flow chart of the method for eliminating low-pressure EGR condensed water provided in Example 1 of the present application, specifically:

[0113] In this embodiment, the low-pressure EGR condensate elimination method includes steps S301-S302:

[0114] Step S301, obtaining a second preset time length for eliminating the condensed water in the intake manifold by looking up a table.

[0115] It should be noted that the second preset time duration is the time taken for the condensed water in the engine to be completely eliminated.

[0116] It is understandable that the second preset durations mentioned above are different for different engines.

[0117] In a specific implementation, the second preset time length t tow It can be determined in the following way: select 5 evenly spaced points (a / b / c / d / e / f) from the operating point (n, m) for testing. First, run the engine stably at this operating point until water droplets are clearly seen in the intake manifold. Then, run the engine to the fuel cut-off mode and record the time t when the water droplets in the intake manifold disappear. a / b / c / d / e / f , then t tow Take t a / b / c / d / e / f The maximum value in .

[0118] Step S302, when it is detected that the operating time is less than a second preset time, the engine enters a fuel cut-off mode, the generator reverses the engine to generate negative pressure, the generated condensed water is sucked into the cylinder for elimination, and the EGR is turned off.

[0119] It should be noted that the negative pressure generated by the generator pulling the engine in reverse can be used to keep the current speed stable.

[0120] It is understandable that different engines maintain different numbers of revolutions when being reversely dragged by the above-mentioned generator.

[0121] In a specific implementation, when it is detected that the operating time is less than a second preset time, the engine enters a fuel cut-off mode, the generator reverses the engine to generate negative pressure, and turns off the EGR to prevent the condensed water sucked into the cylinder and eliminated during this period from being sucked back into the EGR system and hanging on the EGR cooler fins or re-entering the intake manifold. Only then can the generated condensed water be sucked into the cylinder for elimination.

[0122] For example, in order to help understand the implementation process of the low-pressure EGR condensate elimination method obtained by combining this embodiment with the above-mentioned embodiment 4, please refer to Figure 6 , Figure 6 A second simplified flow chart of the method for eliminating low-pressure EGR condensed water provided in Example 1 of the present application, specifically:

[0123] In a feasible implementation manner, step S30 may further include step S31':

[0124] Step S31', when it is detected that the operating time is greater than a second preset time, the engine exits the fuel cut-off mode, the operation returns to normal, and the EGR returns to the normal control mode.

[0125] It should be noted that the above-mentioned normal operation may be a step in which the above-mentioned EGR system is restored to re-detect the current operating condition of the above-mentioned engine.

[0126] It is understandable that the above-mentioned normal operation recovery state of different engines is different.

[0127] In a specific implementation, when it is detected that the operating time is greater than a second preset time, the engine exits the fuel cut-off mode and the operation resumes to normal, the EGR resumes the normal control mode, and the timing of the operating time is reset. The EGR system returns to the step of re-detecting the current operating condition of the engine, and the above-mentioned condensate generation monitoring and elimination are repeated periodically.

[0128] It should be noted that the above examples are only used to understand the present invention and do not constitute a limitation on the low-pressure EGR condensate elimination method of the present invention. More simple transformations based on this technical concept are all within the scope of protection of the present invention.

[0129] The present invention also provides a low-pressure EGR condensate elimination device, please refer to Figure 7 , the low-pressure EGR condensed water elimination device comprises:

[0130] A detection module 10, used to detect the current operating condition of the engine;

[0131] The control module 20 is used to record the operating time of the engine in the condensed water generating condition when the current operating condition is the condensed water generating condition;

[0132] The execution module 30 is used to generate negative pressure by reversely dragging the engine through the generator when the operating time reaches a first preset time, so as to absorb the condensed water into the cylinder for elimination.

[0133] The low-pressure EGR condensed water elimination device provided by the present invention adopts the low-pressure EGR condensed water elimination method in the above-mentioned embodiment, which can solve the technical problem that a part of the accumulated condensed water is sucked into the cylinder, resulting in different degrees of combustion instability, speed jitter or misfire during combustion in the cylinder. Compared with the prior art, the beneficial effects of the low-pressure EGR condensed water elimination device provided by the present invention are the same as the beneficial effects of the low-pressure EGR condensed water elimination method provided by the above-mentioned embodiment, and the other technical features of the low-pressure EGR condensed water elimination device are the same as the features disclosed in the above-mentioned embodiment method, which will not be repeated here.

[0134] The present invention provides a low-pressure EGR condensed water elimination device, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the low-pressure EGR condensed water elimination method in the above-mentioned embodiment one.

[0135] Reference below Figure 8 , which shows a schematic diagram of the structure of a low-pressure EGR condensate elimination device suitable for implementing an embodiment of the present invention. The low-pressure EGR condensate elimination device in the embodiment of the present invention may include but is not limited to mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. Figure 8 The low-pressure EGR condensed water elimination device shown is only an example and should not bring any limitation to the function and scope of use of the embodiment of the present invention.

[0136] like Figure 8As shown, the low-pressure EGR condensed water elimination device may include a processing device 1001 (such as a central processing unit, a graphics processor, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM: Read Only Memory) 1002 or a program loaded from a storage device 1003 to a random access memory (RAM: Random Access Memory) 1004. In RAM1004, various programs and data required for the operation of the low-pressure EGR condensed water elimination device are also stored. The processing device 1001, ROM1002 and RAM1004 are connected to each other through a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems can be connected to the I / O interface 1006: input devices 1007 including, for example, a touch screen, a touchpad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; output devices 1008 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; storage devices 1003 including, for example, a magnetic tape, a hard disk, etc.; and communication devices 1009. The communication device 1009 can allow the low-pressure EGR condensate elimination device to communicate with other devices wirelessly or by wire to exchange data. Although the figure shows a low-pressure EGR condensate elimination device with various systems, it should be understood that it is not required to implement or have all the systems shown. More or fewer systems may be implemented or have instead.

[0137] In particular, according to the embodiments disclosed in the present invention, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present invention include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program contains program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from the network through a communication device, or installed from the storage device 1003, or installed from the ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present invention are executed.

[0138] The low-pressure EGR condensed water elimination device provided by the present invention adopts the low-pressure EGR condensed water elimination method in the above-mentioned embodiment, which can solve the technical problem of low-pressure EGR condensed water elimination. Compared with the prior art, the beneficial effects of the low-pressure EGR condensed water elimination device provided by the present invention are the same as the beneficial effects of the low-pressure EGR condensed water elimination method provided by the above-mentioned embodiment, and other technical features in the low-pressure EGR condensed water elimination device are the same as the features disclosed in the method of the previous embodiment, which will not be repeated here.

[0139] It should be understood that the various parts disclosed in the present invention can be implemented by hardware, software, firmware or a combination thereof. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0140] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

[0141] The present invention provides a computer-readable storage medium having computer-readable program instructions (ie, computer programs) stored thereon, wherein the computer-readable program instructions are used to execute the low-pressure EGR condensate elimination method in the above-mentioned embodiment.

[0142] The computer-readable storage medium provided by the present invention may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, systems or devices, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that may be used by or in combination with an instruction execution system, system or device. The program code contained on the computer-readable storage medium may be transmitted using any suitable medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination thereof.

[0143] The computer-readable storage medium may be included in the low-pressure EGR condensed water elimination device; or may exist independently without being assembled into the low-pressure EGR condensed water elimination device.

[0144] The computer-readable storage medium carries one or more programs. When the one or more programs are executed by the low-pressure EGR condensed water elimination device, the low-pressure EGR condensed water elimination device: eliminates low-pressure EGR condensed water.

[0145] Computer program code for performing the operations of the present invention may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., through the Internet using an Internet service provider).

[0146] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present invention. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs the specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0147] The modules involved in the embodiments of the present invention may be implemented by software or hardware, wherein the name of the module does not limit the unit itself in some cases.

[0148] The readable storage medium provided by the present invention is a computer-readable storage medium, which stores computer-readable program instructions (i.e., computer programs) for executing the above-mentioned low-pressure EGR condensed water elimination method, and can solve the technical problem of low-pressure EGR condensed water elimination. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided by the present invention are the same as the beneficial effects of the low-pressure EGR condensed water elimination method provided by the above-mentioned embodiment, and will not be repeated here.

[0149] The present invention also provides a computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the steps of the low-pressure EGR condensed water elimination method as described above are implemented.

[0150] The computer program product provided by the present invention can solve the technical problem of eliminating low-pressure EGR condensed water. Compared with the prior art, the beneficial effects of the computer program product provided by the present invention are the same as the beneficial effects of the low-pressure EGR condensed water elimination method provided by the above embodiment, which will not be repeated here.

[0151] The above descriptions are only some embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A method for eliminating low-pressure EGR condensed water, characterized in that: The low-pressure EGR condensed water elimination method comprises: Detect the current operating condition of the engine; When the current operating condition is a condensed water generating condition, recording the operating time of the engine in the condensed water generating condition; When the running time reaches a first preset time, the generator reverses the engine to generate negative pressure, and the condensed water is sucked into the cylinder for elimination.

2. The method for eliminating low-pressure EGR condensed water according to claim 1, characterized in that: The step of detecting the current operating condition of the engine specifically includes: Get the engine's intake manifold temperature and EGR status; When it is detected that the EGR is in an activated state and the intake manifold temperature is less than a preset temperature threshold, the current operating condition of the engine is determined to be a condensed water generating condition.

3. The method for eliminating low-pressure EGR condensed water according to claim 2, characterized in that: Before the step of detecting the current operating condition of the engine, the method includes: Acquiring the engine operating status; When the engine operating state does not change within the first preset time period, the process of detecting the current operating condition of the engine is executed.

4. The method for eliminating low-pressure EGR condensed water according to claim 3, characterized in that: When the current operating condition is a condensed water generating condition, the step of recording the operating time of the engine in the condensed water generating condition specifically includes: Obtain engine speed and intake air flow; Determining an operating point and a time weighting coefficient of a condensate generation operating condition according to the engine speed and the intake air flow rate; Obtaining the running time by using the time weighting coefficient; The first preset time duration is obtained through the operating point of the condensed water generation condition.

5. The method for eliminating low-pressure EGR condensed water according to claim 4, characterized in that: When the running time reaches a first preset time, the step of generating negative pressure by reversely dragging the engine by the generator to absorb the condensed water into the cylinder for elimination specifically includes: Obtaining a second preset time duration for eliminating condensed water in the intake manifold by looking up a table; When it is detected that the operating time is less than a second preset time, the engine enters a fuel cut-off mode, the generator reverses the engine to generate negative pressure, sucks the generated condensed water into the cylinder for elimination, and turns off the EGR.

6. The method for eliminating low-pressure EGR condensed water according to claim 5, characterized in that: After the step of generating negative pressure by reversely dragging the engine by the generator when the running time reaches the first preset time, and sucking the condensed water into the cylinder for elimination, the method includes: When it is detected that the operating time is greater than a second preset time, the engine exits the fuel cut-off mode, the operation returns to normal, and the EGR returns to the normal control mode.

7. A low-pressure EGR condensate elimination device, characterized in that: The device comprises: A detection module, used to detect the current operating condition of the engine; A control module, configured to record the operating time of the engine in the condensed water generating condition when the current operating condition is the condensed water generating condition; The execution module is used to generate negative pressure by reversely dragging the engine through the generator when the operating time reaches a first preset time, so as to suck the condensed water into the cylinder for elimination.

8. A low-pressure EGR condensate elimination device, characterized in that: The device comprises: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program is configured to implement the steps of the low-pressure EGR condensed water elimination method according to any one of claims 1 to 6.

9. A storage medium, characterized in that: The storage medium is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, the steps of the low-pressure EGR condensed water elimination method according to any one of claims 1 to 6 are implemented.

10. A computer program product, characterized in that The computer program product comprises a computer program, and when the computer program is executed by a processor, the steps of the method for eliminating low-pressure EGR condensed water according to any one of claims 1 to 6 are implemented.

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