EGR (Exhaust Gas Recirculation) cooling structure of engine and engine cylinder pressure adjusting method and equipment

Abstract

According to the EGR cooling structure of the engine and the engine cylinder pressure adjusting method and device, the advantage that the horizontally-opposed engine has a long cylinder sleeve cylinder body is utilized, and an EGR circulating air pipe and a thermal management system of the horizontally-opposed engine are both arranged in the engine; an air cylinder, an air cylinder waste gas outlet, an air cylinder air inlet, an EGR valve outlet and an air cylinder mixed gas inlet are connected into a waste gas recycling loop through an exhaust pipe and an air inlet pipe included in the EGR circulating air pipe, heat exchange is conducted between the exhaust pipe and the air inlet pipe and the heat management system, heat in waste gas is transferred to the heat management system in time, and waste gas cooling is achieved. According to the scheme, the EGR circulating air pipe is arranged in the engine, the EGR circulating air pipe is cooled through the heat management system which is also arranged in the engine, an EGR intercooler does not need to be additionally arranged, the control design complexity and the machine manufacturing cost of the engine are reduced, and the integration of the engine is improved.

Description

Technical Field

[0001] The present disclosure relates to the field of vehicle engines, and in particular to an EGR cooling structure of an engine, and an engine cylinder pressure regulating method and device. Background Art

[0002] Automotive engines need to further save energy and reduce emissions. EGR (Exhaust Gas Recirculation) technology is a highly energy-saving and emission-reducing technology. In recent years, it has been widely used in automotive engines, especially hybrid system engines. The basic principle of EGR is to use engine exhaust gas, recirculate it into the engine intake system to mix with fresh air, and participate in combustion, so as to effectively improve the combustion adiabatic index and reduce NOx emissions. Among them, because EGR re-introduces high-temperature (generally 400℃~900℃) exhaust gas into low-temperature intake air (25℃) to participate in the combustion process, the high-temperature exhaust gas will greatly affect the combustion effect and intake efficiency, so it is often necessary to cool the exhaust gas, which is generally called EGR intercooling.

[0003] A complete external system is required to implement EGR intercooling. Since the cooling EGR system has high requirements for the device, and on the other hand, it is restricted by the layout of traditional multi-cylinder engines, the EGR intercooler can only be installed externally. This leads to the complex overall structural design of the EGR technical solution, high cost, and low integration with the engine. Summary of the Invention

[0004] The present disclosure provides an EGR cooling structure of an engine, and an engine cylinder pressure regulating method and device.

[0005] According to a first aspect of the present disclosure, an EGR cooling structure of an engine is provided. The engine is a horizontally opposed engine, and a thermal management system is provided inside the engine. The EGR cooling structure includes:

[0006] An EGR circulation air pipe, the EGR circulation air pipe comprising an exhaust pipe and an intake pipe; the exhaust pipe is connected to the cylinder exhaust port of the engine and the cylinder air inlet of the engine, and the intake pipe is connected to the EGR valve outlet of the engine and the cylinder mixed gas inlet of the engine;

[0007] The exhaust pipe and the intake pipe are arranged inside the engine and perform heat exchange with the thermal management system.

[0008] The EGR cooling structure of the engine described in some schemes, the thermal management system includes a water jacket arranged on one side of the engine and an oil cooling component arranged on the other side of the engine; the exhaust pipe is partially or completely arranged in the water jacket; or, is partially or completely arranged in the oil cooling component; the intake pipe is arranged in the oil cooling component.

[0009] The EGR cooling structure of the engine described in some schemes is characterized in that a receiving groove is formed on the inner wall of the engine body, the water jacket and the oil cooling component are arranged in the receiving groove, a first gap is reserved inside the water jacket and / or between the water jacket and the inner wall of the receiving groove, and a second gap is reserved inside the oil cooling component and / or between the oil cooling component and the inner wall of the receiving groove; the exhaust pipe is partially or wholly arranged in the first gap, or partially or wholly arranged in the second gap; the intake pipe is arranged in the second gap.

[0010] In some embodiments of the EGR cooling structure of the engine, when the cylinder includes multiple cylinders, the air inlet of the intake pipe is connected to the cylinder exhaust valves of the multiple cylinders, and the air outlet of the intake pipe is connected to the cylinder mixed gas inlet of the multiple cylinders.

[0011] According to a second aspect of the present disclosure, a method for regulating engine cylinder pressure is provided. The engine is a horizontally opposed engine, and a thermal management system and the EGR cooling structure according to any one of the first aspects are provided inside the engine. The method comprises:

[0012] Adjusting parameters of a target system in the engine, wherein the target system is the thermal management system and / or the EGR cooling structure; the parameters of the target system include: electric pump power of the thermal management system and / or EGR valve opening;

[0013] Obtaining the current temperature of the heat exchange medium in the thermal management system;

[0014] Determining whether the current temperature reaches the corresponding target heat exchange temperature;

[0015] If the current temperature reaches the target heat exchange temperature, determining whether the current cylinder pressure of the engine reaches the target cylinder pressure;

[0016] If the current cylinder pressure does not reach the target cylinder pressure, the parameters of the target system are continuously adjusted until the current cylinder pressure reaches the target cylinder pressure.

[0017] In some embodiments, the method of adjusting the parameters of the target system in the engine includes:

[0018] Obtaining a target EGR rate of the engine;

[0019] Obtaining a first corresponding relationship between a pre-calibrated EGR rate and a parameter of the target system;

[0020] Matching the target EGR rate with the first corresponding relationship to determine a target parameter of the target system;

[0021] The parameters of the target system are adjusted to the target parameters.

[0022] In some embodiments, the method of adjusting the parameters of the target system in the engine includes:

[0023] Obtaining a target EGR rate of the engine;

[0024] Obtaining a second correspondence between a pre-calibrated EGR rate and a physical parameter of exhaust gas in an EGR circulation pipe of the EGR cooling structure, and a third correspondence between the physical parameter of exhaust gas in the EGR circulation pipe and a parameter of the target system;

[0025] matching the target EGR rate with the second corresponding relationship to determine target physical parameters of the exhaust gas in the EGR circulation pipe;

[0026] Matching the target physical parameter with the third corresponding relationship to determine the target parameter of the target system;

[0027] The parameters of the target system are adjusted to the target parameters.

[0028] In some embodiments of the method, the thermal management system includes a water jacket and / or an oil cooling component, and the heat exchange medium includes water and / or oil;

[0029] The obtaining of the current temperature of the heat exchange medium in the thermal management system includes: obtaining the current temperature of the water in the water jacket and / or the current temperature of the oil in the oil cooling component;

[0030] The determining whether the current temperature reaches the corresponding target heat exchange temperature includes determining whether the current temperature of the water reaches the corresponding target water temperature and / or whether the current temperature of the oil reaches the corresponding target oil temperature.

[0031] In some embodiments, after determining whether the current temperature reaches the corresponding target heat exchange temperature, the method further includes:

[0032] If the current temperature does not reach the target heat exchange temperature, the parameters of the target system continue to be adjusted until the current temperature reaches the target heat exchange temperature.

[0033] According to a third aspect of the present disclosure, there is provided an engine cylinder pressure regulating device, comprising:

[0034] a first adjustment module, configured to adjust parameters of a target system in the engine, wherein the target system is the thermal management system and / or the EGR cooling structure; the parameters of the target system include: electric pump power of the thermal management system and / or EGR valve opening;

[0035] An acquisition module, configured to acquire the current temperature of the heat exchange medium in the thermal management system;

[0036] A first judgment module is used to judge whether the current temperature reaches the corresponding target heat exchange temperature;

[0037] a second judgment module, configured to judge whether the current cylinder pressure of the engine reaches the target cylinder pressure if the current temperature reaches the target heat exchange temperature;

[0038] The second adjustment module is configured to continue adjusting the parameters of the target system if the current cylinder pressure does not reach the target cylinder pressure until the current cylinder pressure reaches the target cylinder pressure.

[0039] According to a third aspect of the present disclosure, there is provided an electronic device, including:

[0040] at least one processor; and

[0041] a memory communicatively connected to the at least one processor; wherein,

[0042] The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform any method according to the second aspect.

[0043] According to a fourth aspect of the present disclosure, a non-transitory computer-readable storage medium storing computer instructions is provided, wherein the computer instructions are used to cause the computer to execute the method according to any one of the second aspects.

[0044] According to a fifth aspect of the present disclosure, a computer program product is provided, comprising a computer program / instruction, wherein the computer program / instruction implements the steps of any one of the methods according to the second aspect when executed by a processor.

[0045] The disclosed engine EGR cooling structure, engine cylinder pressure regulation method, and apparatus utilize the advantages of a horizontally opposed engine's longer cylinder liner and block. The EGR circulation duct and the thermal management system of the horizontally opposed engine are both located within the engine. Due to the large size of the horizontal engine's cylinder liner and block, the volume or capacity of the thermal management system can be increased to meet EGR cooling requirements. The EGR circulation duct, including an exhaust pipe and an intake pipe, connects the cylinder, the cylinder exhaust outlet, the cylinder air inlet, the EGR valve outlet, and the cylinder mixed gas inlet to form an exhaust gas recycling loop. The exhaust pipe and intake pipe exchange heat with the thermal management system, promptly transferring heat from the exhaust gas to the thermal management system, thereby achieving exhaust gas cooling. In this solution, the EGR circulation duct is located within the engine and cooled by the thermal management system, which is also located within the engine. This eliminates the need for a separate EGR intercooler, reducing the complexity of engine control design and machine cost while improving engine integration.

[0046] It should be understood that the contents described in the Summary of the Invention section are not intended to limit the key or important features of the embodiments of the present disclosure, nor are they intended to limit the scope of the present disclosure. Other features of the present disclosure will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The above and other features, advantages and aspects of the embodiments of the present disclosure will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. The accompanying drawings are provided for a better understanding of the present disclosure and do not constitute a limitation of the present disclosure. In the accompanying drawings, the same or similar reference numerals represent the same or similar elements, among which:

[0048] Figure 1 A diagram showing the arrangement of an EGR circulation air pipe of an EGR cooling structure in a thermal management system;

[0049] Figure 2 A diagram showing the arrangement of an EGR circulation air pipe of another EGR cooling structure in a thermal management system;

[0050] Figure 3 A flow chart of a method for adjusting engine cylinder pressure according to an embodiment of the present disclosure is shown;

[0051] Figure 4 A logical diagram showing a method for calculating engine cylinder pressure according to an embodiment of the present disclosure is shown;

[0052] Figure 5 A block diagram of an engine cylinder pressure regulating device according to an embodiment of the present disclosure is shown;

[0053] Figure 6 A block diagram of an exemplary electronic device capable of implementing embodiments of the present disclosure is shown.

[0054] Wherein, each reference numeral represents:

[0055] 101 - first part of thermal management system; 102 - second part of thermal management system;

[0056] 201-exhaust pipe; 202-intake pipe; 301-cylinder exhaust gas outlet; 302-cylinder air inlet; 303-cylinder mixture gas inlet; 304-EGR valve outlet; 40-cylinder head; 501-first adjustment module; 502-acquisition module; 503-first judgment module; 504-second judgment module; 505-second adjustment module; 601-CPU; 602-ROM; 603-RAM; 604-bus; 605-I / O interface; 606-input unit; 607-output unit; 608-storage unit; 609-communication unit. DETAILED DESCRIPTION

[0057] To make the purpose, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present disclosure.

[0058] In this document, the term "and / or" simply describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0059] The embodiment of the present application provides an EGR cooling structure of an engine, such as Figure 1 and Figure 2As shown, the engine is a horizontally opposed engine and includes two horizontally opposed cylinders: cylinder 1 and cylinder 2. In actual use, the number of cylinders can be determined based on the actual engine's conditions. A thermal management system is installed within the engine. As shown, the engine interior includes a first side inner wall and a second side inner wall, where the first and second side inner walls refer to the metal inner walls of the engine body. The first side inner wall includes a first portion 101 of the thermal management system, while the second side inner wall includes a second portion 102 of the thermal management system. The EGR cooling structure includes an EGR circulation air duct, which includes an exhaust pipe 201 and an intake pipe 202. The exhaust pipe 201 connects the engine's cylinder exhaust outlet 301 and the engine's cylinder air inlet 302, while the intake pipe 202 connects the engine's EGR valve outlet 304 and the engine's cylinder mixed gas inlet 303. The exhaust pipe 201 and the intake pipe 202 are located within the engine and exchange heat with the thermal management system.

[0060] In the above scheme, leveraging the advantages of a horizontally opposed engine's longer cylinder liner and block, both the EGR circulation duct and the boxer engine's thermal management system are located within the engine. Specifically, they can be embedded within the metal inner wall of the engine's body. Due to the large size of the boxer engine's cylinder liner and block, the thermal management system's volume or capacity can be increased, enabling it to meet EGR cooling requirements. The EGR circulation duct, comprising an exhaust pipe and an intake pipe, connects the cylinder, the cylinder exhaust outlet 301, the cylinder air inlet 302, the EGR valve outlet 304, and the cylinder mixed gas inlet 303 to form an exhaust gas recycling loop. The exhaust pipe 201 and intake pipe 202 exchange heat with the thermal management system, transferring heat from the exhaust gas to the thermal management system in a timely manner, thus achieving exhaust gas cooling. In this scheme, the EGR circulation duct is located within the engine and cooled by the thermal management system, which is also located within the engine. This eliminates the need for a separate EGR intercooler, reducing engine control design complexity and machine cost while also improving engine integration.

[0061] It is understood that the number and arrangement of the EGR circulation pipes are determined according to the number of cylinders in the engine, such as Figure 1-3 The engine shown in the figure is a horizontally opposed twin-cylinder engine with two cylinders. The EGR circulation pipe includes a first EGR circulation pipe and a second EGR circulation pipe, wherein the first EGR circulation pipe is laid along the thermal management system of cylinder 1 and the portion where cylinder 1 is located in the twin-cylinder engine, and the second EGR circulation pipe is laid along the thermal management system of cylinder 2 and the portion where cylinder 2 is located in the twin-cylinder engine. Figure 1-3As shown, the first EGR circulation air pipe of the horizontally opposed two-cylinder engine (i.e., the cylinder block is horizontal, and the cylinder head 40 is on the left and right sides) is the solid line shown by the right cylinder 1, and the second EGR circulation air pipe is the solid line shown by the left cylinder 2, wherein the arrow is the flow direction of the exhaust gas in the EGR circulation air pipe, and the dotted lines on the upper side of the left and right cylinders represent the intake, which is composed of the air that should originally enter the cylinder and a part of the exhaust gas released from the engine exhaust port, and the dotted lines on the lower side of the left and right cylinders represent the exhaust, which is a part of the gas released after the intake air flowing into the cylinder is burned in the cylinder. That is, as shown in the figure, when the engine is a horizontally opposed two-cylinder engine, the two ends of the engine include the cylinder head of each cylinder, the first EGR circulation air pipe is arranged along the cylinder head of the first cylinder in the two-cylinder engine, the lower side of the thermal management system of the part where the first cylinder is located, the second cylinder and the upper side of the thermal management system of the part where the second cylinder is located, and the cylinder head of the second cylinder, and the second EGR circulation air pipe is laid along the cylinder head of the second cylinder in the two-cylinder engine, the lower side of the thermal management system of the part where the second cylinder is located, the first cylinder and the upper side of the thermal management system of the part where the first cylinder is located, and the cylinder head of the first cylinder.

[0062] In some programs, Figure 1 and Figure 2 The engine's EGR cooling structure is shown in FIG. The thermal management system includes a water jacket on one side of the engine and an oil cooling component on the other side. For example, the first portion 101 of the thermal management system is the water jacket, and the second portion 102 is the oil cooling component. The exhaust pipe 201 is partially or entirely located on the side of the water jacket, or partially or entirely located on the side of the oil cooling component. The intake pipe 202 is located on the side of the oil cooling component. The purpose of EGR cooling is to transfer heat from the exhaust gas to water or oil. Heating the water or oil allows them to function better, for example, oil is used for lubrication, while water is used to heat other components. In specific applications, the ratio of exhaust pipe 201 to intake pipe 202 can be determined based on the time of day to determine whether water or oil heating is more important in the vehicle. If water heating is more important, more exhaust pipes 201 and water jackets can be placed on one side. If oil heating is more important, more exhaust pipes 201 and intake pipe 202 can be placed on the same side. Through this solution, the recovered waste gas heat can be used more reasonably.

[0063] Preferably, a receiving groove is formed on the inner wall of the engine body, and the water jacket and the oil cooling component are arranged in the receiving groove. A first gap is reserved inside the water jacket and / or between the water jacket and the inner wall of the receiving groove, and a second gap is reserved inside the oil cooling component and / or between the oil cooling component and the inner wall of the receiving groove; the exhaust pipe 201 is partially or completely arranged in the first gap, or partially or completely arranged in the second gap; the intake pipe 202 is arranged in the second gap. Since the engine body is usually made of metal, the receiving groove can be easily formed. Through this solution, the water jacket and the oil cooling component can be a pipeline structure, and a reserved gap can be set between the pipelines, and a gap can also be reserved between the pipeline and the inner wall of the receiving groove. The water jacket, oil cooling component, exhaust pipe 201 and intake pipe 202 are all arranged in the receiving groove, which can further improve the integration of the EGR circulation pipe and the thermal management system, reduce the number of components required for the engine, and reduce costs.

[0064] In addition, when there are multiple cylinders, the air inlet of the air inlet pipe 201 is connected to the cylinder exhaust valves of the multiple cylinders, and the air outlet of the air inlet pipe 201 is connected to the cylinder mixed gas inlet 303 of the multiple cylinders. Figure 1 and Figure 2 In the structure shown, when there are multiple cylinders, the intake pipe 202 can be connected between the cylinder exhaust valve and the cylinder mixed gas inlet of the same cylinder, or between the cylinder exhaust valve and the cylinder mixed gas inlet of different cylinders. Figure 2 In the structure shown, when the intake pipe 202 is connected between the cylinder exhaust valve and the cylinder mixed gas inlet of different cylinders, the cooling length of the intake pipe 202 can be increased, and the cooling efficiency can be improved. At the same time, if the exhaust gas components obtained by cylinder 1 and cylinder 2 after combustion are different, Figure 1 In the structure shown, the exhaust gas from cylinder 1 is fed back into cylinder 2 for further combustion, which can further improve the exhaust gas recycling rate.

[0065] Figure 3 A flowchart illustrating a method for regulating engine cylinder pressure according to an embodiment of the present disclosure is provided. The engine is a horizontally opposed engine equipped with a thermal management system and the EGR cooling structure described in the above method embodiment. This method can be applied to a vehicle-side control system and may include:

[0066] S10, adjusting parameters of a target system in the engine, wherein the target system is the thermal management system and / or the EGR cooling structure; the parameters of the target system include: the electric pump power of the thermal management system and / or the EGR valve opening.

[0067] As previously mentioned, the EGR cooling structure is placed inside the engine, exchanging heat with the thermal management system and transferring heat from the exhaust gas to the thermal management system. Specifically, the EGR cooling structure's recirculating air duct is used to receive a portion of the exhaust gas released by the engine, and the thermal management system is used to cool the exhaust gas in the recirculating air duct.

[0068] Combine Figure 1-3 The EGR valve is arranged at the exhaust port of the cylinder. The change of its opening can control the amount of gas entering the circulating air pipe. The gas here includes the air entering from the outside and the exhaust gas discharged from the cylinder. Therefore, the opening of the EGR valve can adjust the amount of exhaust gas entering the circulating air pipe.

[0069] S20: Obtain the current temperature of the heat exchange medium in the thermal management system.

[0070] After adjusting the parameters, the above current temperature is obtained. Specifically, if the thermal management system is a water jacket, the heat exchange medium is water; if the thermal management system is an oil cooling component, the heat exchange medium is oil.

[0071] S30: Determine whether the current temperature reaches the corresponding target heat exchange temperature.

[0072] The target heat exchange temperature may vary depending on the current operating conditions, and the current operating conditions may vary depending on the ambient temperature.

[0073] S40: If the current temperature reaches the target heat exchange temperature, determine whether the current cylinder pressure of the engine reaches the target cylinder pressure.

[0074] The target cylinder pressure may vary depending on the current operating conditions, and the current operating conditions may vary depending on the ambient temperature.

[0075] S50 : If the current cylinder pressure does not reach the target cylinder pressure, continue adjusting the parameters of the target system until the current cylinder pressure reaches the target cylinder pressure.

[0076] In the above scheme, the EGR circulation air pipe in the EGR cooling structure is set inside the engine to exchange heat with the thermal management system, thereby realizing the integration of the EGR cooling structure and the engine, which not only reduces the complexity of the engine control design and the engine cost, but also improves the integration and reliability. Moreover, since the EGR cooling structure is integrated with the engine, after adjusting the parameters of the target system, it is possible to judge whether the current temperature of the thermal management system reaches the corresponding target heat exchange temperature. If it reaches it, it means that the current temperature in the heat exchange medium is appropriate, that is, the temperature inside the engine is appropriate. Therefore, the current cylinder pressure of the engine can be further judged. If the current cylinder pressure does not reach the target cylinder pressure, the parameters of the target system can be continued to be adjusted until the current cylinder pressure reaches the target cylinder pressure to ensure that the cylinder pressure in the engine is also appropriate. In this way, the vehicle's thermal management system makes full use of the exhaust gas of EGR to participate in the engine combustion control, optimizes the combustion performance of the engine, and thus achieves energy conservation and emission reduction.

[0077] In some embodiments, the step S10 of adjusting the parameters of the target system in the engine includes:

[0078] S101: Obtain the target EGR rate of the engine.

[0079] The EGR rate is defined as the ratio of recirculated exhaust gas to the total intake air drawn into the cylinder. Proper control of the EGR rate is crucial for nitrogen oxide purification and overall engine emissions. Calibration testing requires a method to quantify the EGR rate to assess the impact of exhaust gas recirculation on engine performance. The higher the EGR rate, the greater the amount of exhaust gas recirculated into the EGR system's exhaust line. The target EGR rate can vary depending on operating conditions; for example, the target EGR rate can be different in summer and winter.

[0080] S102: Acquire a first corresponding relationship between a pre-calibrated EGR rate and a parameter of the target system.

[0081] The specific electric pump power and / or the specific EGR valve opening under different EGR rates may be recorded in advance, thereby forming a corresponding relationship between the EGR rate and the parameters of the target system.

[0082] S103: Match the target EGR rate with the first corresponding relationship to determine target parameters of the target system.

[0083] Simply search for the target EGR rate location in the first corresponding relationship and determine the corresponding target system parameters as the target parameters.

[0084] S104: Adjust the parameters of the target system to the target parameters.

[0085] Since the EGR rate will be affected by the electric pump power and / or the EGR valve opening, after obtaining the target EGR rate, a first correspondence between the pre-calibrated EGR rate and the parameters of the target system can be obtained, and then the target EGR rate is automatically matched with the first correspondence to determine the target parameters of the target system, thereby automatically adjusting the parameters of the target system to the target parameters.

[0086] In other embodiments, the step S10 of adjusting the parameters of the target system in the engine includes:

[0087] S1001: Obtain the target EGR rate of the engine.

[0088] S1002: Acquire a second correspondence between a pre-calibrated EGR rate and a physical parameter of exhaust gas in the EGR circulation pipe of the EGR cooling structure, and a third correspondence between the physical parameter of exhaust gas in the EGR circulation pipe and a parameter of the target system.

[0089] The physical parameters may be the pressure Pegr and the temperature Tegr of the exhaust gas in the EGR circulation pipe.

[0090] S1003: Match the target EGR rate with the second corresponding relationship to determine the target physical parameter of the exhaust gas in the EGR circulation pipe. Match the target physical parameter with the third corresponding relationship to determine the target parameter of the target system.

[0091] The matching process is similar to that of the first correspondence.

[0092] S1004: Adjust the parameters of the target system to the target parameters.

[0093] Since the pressure and temperature of the exhaust gas in the EGR circulation pipe directly affect the EGR rate, and the electric pump power and the EGR valve opening affect the amount of exhaust gas in the EGR circulation pipe and thus affect the pressure and temperature of the exhaust gas in the EGR circulation pipe, there is a second corresponding relationship between the EGR rate and the physical parameters of the exhaust gas in the EGR circulation pipe, and there is also a third corresponding relationship between the physical parameters of the exhaust gas in the EGR circulation pipe and the parameters of the target system. Therefore, by matching the target EGR rate with the second corresponding relationship, the target physical parameters of the exhaust gas in the EGR circulation pipe can be automatically determined, and then the target physical parameters can be matched with the third corresponding relationship to automatically determine the target parameters of the target system, thereby improving the control accuracy of the target system, and thus making the current EGR rate reach the target EGR rate.

[0094] In some embodiments, the thermal management system includes a water jacket, and accordingly, the heat exchange medium includes water; the thermal management system includes an oil cooling component, and accordingly, the heat exchange medium includes oil. Based on this, obtaining the current temperature of the heat exchange medium in the thermal management system in step S20 includes: obtaining the current temperature of the water in the water jacket; obtaining the current temperature of the oil in the oil cooling system. Determining whether the current temperature reaches the corresponding target heat exchange temperature in step S30 includes: determining whether the current temperature of the water in the water jacket reaches the corresponding target water temperature; determining whether the current temperature of the oil in the oil cooling component reaches the corresponding target oil temperature. If the EGR circulation air pipe is integrated with the water jacket, the current temperature of the water in the water jacket is obtained and it is judged whether the corresponding target water temperature is reached. If the EGR circulation air pipe is integrated with the oil cooling component, the current temperature of the oil in the oil cooling component is obtained and it is judged whether the corresponding target oil temperature is reached. If the upper side of the cylinder of the horizontally opposed engine is wrapped by the water jacket and the lower side is wrapped by the oil cooling component, the current temperature of the water in the water jacket and the current temperature of the oil in the oil cooling component are obtained at the same time. Then, it is judged whether the current temperature of the water in the water jacket has reached the corresponding target water temperature, and whether the current temperature of the oil in the oil cooling system has reached the corresponding target oil temperature. Only when both are met at the same time, the current cylinder pressure of the engine is obtained and it is judged whether the target cylinder pressure is reached. In this way, the temperature control accuracy of the heat exchange medium in the engine can be improved, which is beneficial to improving the EGR rate of the engine.

[0095] In some embodiments, after step S20, the method further includes:

[0096] S201: If the current temperature does not reach the target heat exchange temperature, continue adjusting the parameters of the target system until the current temperature reaches the target heat exchange temperature.

[0097] That is, if the current temperature does not reach the target heat exchange temperature, it means that the current temperature of the heat exchange medium has not reached the most suitable temperature. Therefore, the parameters of the target system can be further adjusted, and then the current temperature of the heat exchange medium can be re-acquired after adjustment to determine whether the current temperature has reached the corresponding target heat exchange temperature. If not, the steps of adjusting the parameters of the target system and obtaining the current temperature and judging are repeated until the current temperature of the heat exchange medium reaches the corresponding target heat exchange temperature. This indicates that the current temperature of the heat exchange medium is controlled very appropriately, which can achieve rapid heat engine, reduce oil friction in the thermal management system, and optimize combustion. Therefore, the current cylinder pressure of the engine can be obtained at this time to further optimize combustion.

[0098] The following will be combined Figure 4 The technical solution of the present disclosure is further described, wherein: Figure 4There is no restriction on the medium pump, which can be a mechanical pump or an electric pump. To simplify the explanation, the horizontally opposed engine will be referred to as the engine below. Settings: Min is the mass of oxygen in the cylinder intake, P is the power of the pump in the thermal management system, S is the EGR valve opening, Tin is the intake temperature, Pcyl is the current cylinder pressure of the engine, Toil is the current oil temperature of the oil in the oil cooling component of the engine, and Twater is the current water temperature of the water in the water jacket of the engine. After engine calibration (the calibration process is the process of obtaining the correspondence between different parameters, Pcyl, Toil, and Twater are collected on the engine), P and S can be used to control the exhaust gas pressure Pegr and exhaust gas temperature Tegr that pass through the EGR valve into the EGR circulation air pipe, thereby achieving true control of the EGR rate Regr. That is, the EGR rate Regr has a certain corresponding relationship with the exhaust gas pressure Pegr and the exhaust gas temperature Tegr, and there is a certain corresponding relationship between the exhaust gas pressure Pegr and the exhaust gas temperature Tegr and the pump power P and the EGR valve opening S. Therefore, the above relationship can be expressed as: Regr = f(Tegr, Pegr) = f(P, S), and the EGR rate Regr refers to the ratio of the amount of recirculated exhaust gas to the total amount of intake air sucked into the cylinder. Therefore, different EGR rates Regr will result in different oxygen masses entering the cylinder. Therefore, there is a certain relationship between the oxygen mass Min in the cylinder intake and Regr, that is, the following corresponding relationship exists Min = f(Regr), Min(Regr) = f(Tegr, Pegr) = f(P, S). Therefore, the oxygen mass Min in the cylinder intake can be directly controlled by the pump power P and the EGR valve opening S to realize the function of the throttle valve. That is, the solution disclosed in the present invention can eliminate the throttle valve and simplify the engine structure.

[0099] Furthermore, under certain special operating conditions, such as cold starts (where Tin is relatively low), waste heat from the engine's exhaust can be utilized to heat oil or water by controlling pump power P and EGR valve opening S. This, in turn, alters the values ​​of Toil and Twater, resulting in the following relationship: Toil,water = f(Regr) = f(Tegr,Pegr) = f(P,S). This allows for rapid engine warm-up by recovering exhaust heat, reducing oil friction in the thermal management system and optimizing combustion. Similarly, controlling pump power P and EGR valve opening S controls the temperature of the heat exchange medium, resulting in changes in exhaust temperature and, consequently, in the intake air temperature, adaptively changing it. This relationship holds: Tin = f(Regr) = f(Tegr,Pegr) = f(P,S). For example, under overheating conditions (where Tin is relatively high), oil or water cooling can be implemented by controlling pump power P and EGR valve opening S, thereby enhancing EGR cooling and increasing the EGR rate. Finally, due to the changes in the EGR rate Regr and the temperature of the heat exchange medium, the oxygen mass and the intake temperature in the cylinder intake air change, that is, the following corresponding relationship exists: Pcyl = f(Min, Tin) = f(P, S). Therefore, the Pcyl disclosed in the present invention is effectively optimized, the thermal efficiency is improved, and energy conservation and emission reduction are achieved.

[0100] It should be noted that for the aforementioned method embodiments, for simplicity of description, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the present disclosure is not limited by the order of the actions described, because according to the present disclosure, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily required by the present disclosure.

[0101] The above is an introduction to the method embodiment. The following is a further explanation of the solution disclosed in the present disclosure through an apparatus embodiment.

[0102] Figure 5 A block diagram of an engine cylinder pressure regulating device according to an embodiment of the present disclosure is shown. Figure 5 As shown, the device includes:

[0103] The first adjustment module 501 is used to adjust the parameters of the target system in the engine, wherein the target system is the thermal management system and / or the EGR cooling structure; the parameters of the target system include: the electric pump power of the thermal management system and / or the EGR valve opening.

[0104] The acquisition module 502 is configured to acquire the current temperature of the heat exchange medium in the thermal management system.

[0105] The first judgment module 503 is used to judge whether the current temperature reaches the corresponding target heat exchange temperature.

[0106] The second judgment module 504 is configured to judge whether the current cylinder pressure of the engine reaches the target cylinder pressure if the current temperature reaches the target heat exchange temperature.

[0107] The second adjustment module 505 is configured to continue adjusting the parameters of the target system if the current cylinder pressure does not reach the target cylinder pressure until the current cylinder pressure reaches the target cylinder pressure.

[0108] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the described module can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0109] According to an embodiment of the present disclosure, the present disclosure further provides a computer program product, including a computer program / instruction, characterized in that when the computer program / instruction is executed by a processor, the steps of the method embodiment described in any one of the method embodiments are implemented.

[0110] According to an embodiment of the present disclosure, the present disclosure further provides a non-transitory computer-readable storage medium storing computer instructions, wherein the computer instructions are used to enable the computer to execute any one of the above method embodiments.

[0111] According to an embodiment of the present disclosure, the present disclosure further provides an electronic device, including:

[0112] at least one processor; and

[0113] a memory communicatively connected to the at least one processor; wherein,

[0114] The memory stores instructions that can be executed by the at least one processor. The instructions are executed by the at least one processor to enable the at least one processor to perform any one of the above method embodiments.

[0115] Figure 6 A schematic block diagram of an electronic device that can be used to implement an embodiment of the present disclosure is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital assistants, cellular phones, smartphones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present disclosure described and / or claimed herein.

[0116] The device includes a computing unit CPU 601, which can perform various appropriate actions and processes according to a computer program stored in a read-only memory ROM 602 or a computer program loaded from a storage unit 608 into a random access memory RAM 603. Various programs and data required for device operation can also be stored in RAM 603. CPU 601, ROM 602, and RAM 603 are connected to each other via a bus 604. An I / O interface 605 (input / output interface) is also connected to bus 604.

[0117] Multiple components in the device are connected to the I / O interface 605, including: an input unit 606, such as a keyboard, mouse, etc.; an output unit 607, such as various types of displays, speakers, etc.; a storage unit 608, such as a magnetic disk, optical disk, etc.; and a communication unit 609, such as a network card, modem, wireless communication transceiver, etc. The communication unit 609 allows the device to exchange information / data with other devices via a computer network such as the Internet and / or various telecommunication networks.

[0118] The CPU 601 may be a variety of general and / or specialized processing components with processing and computing capabilities. Some examples of the CPU 601 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various computing units that run machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The CPU 601 performs the various methods and processes described above, such as the various schemes in the method embodiments. For example, in some embodiments, the method embodiments may be implemented as a computer software program that is tangibly contained in a machine-readable medium, such as a storage unit 608. In some embodiments, part or all of the computer program may be loaded and / or installed on the device via the ROM 602 and / or the communication unit 609. When the computer program is loaded into the RAM 603 and executed by the CPU 601, one or more steps of the method described above may be performed. Alternatively, in other embodiments, the CPU 601 may be configured to perform the various steps of the method by any other appropriate means (e.g., by means of firmware).

[0119] Various embodiments of the systems and techniques described herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), system-on-chip systems (SOCs), programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments can include being implemented in one or more computer programs that are executable and / or interpreted on a programmable system that includes at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0120] The program code for implementing the method of the present disclosure can be written in any combination of one or more programming languages. These program codes can be provided to a processor or controller of a general-purpose computer, a special-purpose computer, or other programmable data processing device so that when the program code is executed by the processor or controller, the functions / operations specified in the flow chart and / or block diagram are implemented. The program code can be executed entirely on the machine, partially on the machine, as a stand-alone software package, partially on the machine and partially on a remote machine, or entirely on a remote machine or server.

[0121] In the context of the present disclosure, a machine-readable medium can be a tangible medium that can contain or store a program for use by or in conjunction with an instruction execution system, device or equipment. A machine-readable medium can be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium can include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or equipment, or any suitable combination of the foregoing. A more specific example of a machine-readable storage medium can include an electrical connection based on one or more lines, 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 of the foregoing.

[0122] To provide interaction with a user, the systems and techniques described herein can be implemented on a computer having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user can provide input to the computer. Other types of devices can also be used to provide interaction with the user; for example, the feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including acoustic input, voice input, or tactile input).

[0123] The systems and techniques described herein can be implemented in a computing system that includes back-end components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes front-end components (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such back-end components, middleware components, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include a local area network (LAN), a wide area network (WAN), and the Internet.

[0124] A computing system may include clients and servers. The client and server are generally remote from each other and typically interact via a communication network. This client-server relationship arises through computer programs running on the respective computers and forming a client-server relationship with each other. The server may be a cloud server, a server in a distributed system, or a server integrated with a blockchain.

[0125] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in this disclosure can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solutions disclosed in this disclosure can be achieved. This is not a limitation herein.

[0126] The above specific embodiments do not constitute a limitation on the scope of protection of this disclosure. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this disclosure shall be included within the scope of protection of this disclosure.

Claims

1. An EGR cooling structure for an engine, wherein the engine is a horizontally opposed engine and a thermal management system is provided inside the engine, characterized in that: The EGR cooling structure includes: An EGR circulation air pipe, the EGR circulation air pipe comprising an exhaust pipe and an intake pipe; the exhaust pipe is connected to the cylinder exhaust port of the engine and the cylinder air inlet of the engine, and the intake pipe is connected to the EGR valve outlet of the engine and the cylinder mixed gas inlet of the engine; The exhaust pipe and the intake pipe are arranged inside the engine and perform heat exchange with the thermal management system.

2. The EGR cooling structure of the engine according to claim 1, characterized in that: The thermal management system includes a water jacket provided on one side of the engine and an oil cooling component provided on the other side of the engine; The exhaust pipe is partially or wholly disposed in the water jacket, or partially or wholly disposed in the oil cooling component; the air intake pipe is disposed in the oil cooling component.

3. The EGR cooling structure of the engine according to claim 2, characterized in that: The inner wall of the engine body is formed with a receiving groove, the water jacket and the oil cooling component are arranged in the receiving groove, a first gap is reserved inside the water jacket and / or between the water jacket and the inner wall of the receiving groove, and a second gap is reserved inside the oil cooling component and / or between the oil cooling component and the inner wall of the receiving groove; The exhaust pipe is partially or entirely disposed in the first gap, or partially or entirely disposed in the second gap; the air intake pipe is disposed in the second gap.

4. The EGR cooling structure of the engine according to claim 1, characterized in that: When the cylinder comprises multiple cylinders, the air inlet of the air intake pipe is connected to the cylinder exhaust valves of the multiple cylinders, and the air outlet of the air intake pipe is connected to the cylinder mixed gas inlet of the multiple cylinders.

5. A method for regulating engine cylinder pressure, characterized in that: The engine is a horizontally opposed engine, and a thermal management system and the EGR cooling structure according to any one of claims 1 to 4 are provided inside the engine. The method comprises: Adjusting parameters of a target system in the engine, wherein the target system is the thermal management system and / or the EGR cooling structure; the parameters of the target system include: electric pump power of the thermal management system and / or EGR valve opening; Obtaining the current temperature of the heat exchange medium in the thermal management system; Determining whether the current temperature reaches the corresponding target heat exchange temperature; If the current temperature reaches the target heat exchange temperature, determining whether the current cylinder pressure of the engine reaches the target cylinder pressure; If the current cylinder pressure does not reach the target cylinder pressure, the parameters of the target system are continuously adjusted until the current cylinder pressure reaches the target cylinder pressure.

6. The method according to claim 5, characterized in that The adjusting the parameters of the target system in the engine includes: Obtaining a target EGR rate of the engine; Obtaining a first corresponding relationship between a pre-calibrated EGR rate and a parameter of the target system; Matching the target EGR rate with the first corresponding relationship to determine a target parameter of the target system; The parameters of the target system are adjusted to the target parameters.

7. The method according to claim 5, characterized in that The adjusting the parameters of the target system in the engine includes: Obtaining a target EGR rate of the engine; Obtaining a second correspondence between a pre-calibrated EGR rate and a physical parameter of exhaust gas in an EGR circulation pipe of the EGR cooling structure, and a third correspondence between the physical parameter of exhaust gas in the EGR circulation pipe and a parameter of the target system; matching the target EGR rate with the second corresponding relationship to determine target physical parameters of the exhaust gas in the EGR circulation pipe; Matching the target physical parameter with the third corresponding relationship to determine the target parameter of the target system; The parameters of the target system are adjusted to the target parameters.

8. The method according to claim 5, characterized in that The thermal management system includes a water jacket and / or an oil cooling component, and the heat exchange medium includes water and / or oil; The obtaining of the current temperature of the heat exchange medium in the thermal management system includes: obtaining the current temperature of the water in the water jacket and / or the current temperature of the oil in the oil cooling component; The determining whether the current temperature reaches the corresponding target heat exchange temperature includes determining whether the current temperature of the water reaches the corresponding target water temperature and / or whether the current temperature of the oil reaches the corresponding target oil temperature.

9. The method according to claim 5, characterized in that After determining whether the current temperature reaches the corresponding target heat exchange temperature, the method further includes: If the current temperature does not reach the target heat exchange temperature, the parameters of the target system continue to be adjusted until the current temperature reaches the target heat exchange temperature.

10. An engine cylinder pressure regulating device, characterized in that: include: a first adjustment module, configured to adjust parameters of a target system in the engine, wherein the target system is the thermal management system and / or the EGR cooling structure; the parameters of the target system include: electric pump power of the thermal management system and / or EGR valve opening; An acquisition module, configured to acquire the current temperature of the heat exchange medium in the thermal management system; A first judgment module is used to judge whether the current temperature reaches the corresponding target heat exchange temperature; a second judgment module, configured to judge whether the current cylinder pressure of the engine reaches the target cylinder pressure if the current temperature reaches the target heat exchange temperature; The second adjustment module is configured to continue adjusting the parameters of the target system if the current cylinder pressure does not reach the target cylinder pressure until the current cylinder pressure reaches the target cylinder pressure.

11. An electronic device, characterized in that: include: at least one processor; as well as a memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the method according to any one of claims 5 to 9.

12. A non-transitory computer-readable storage medium storing computer instructions, characterized in that: The computer instructions are used to cause the computer to execute the method according to any one of claims 5-9.

13. A computer program product comprising a computer program / instructions, characterized in that When the computer program / instructions are executed by a processor, the steps of any one of the methods 5-9 are implemented.

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