A Diesel Engine and Third-Party Aftertreatment DPF Regeneration Interaction System and Method

Abstract

The present invention belongs to the technical field of diesel engine emission control, and specifically provides a diesel engine and a third-party aftertreatment DPF regeneration interaction system and method. The system includes an engine controller and a third-party aftertreatment controller connected by a CAN line to achieve information transmission; the third-party aftertreatment controller is connected to the DPF regeneration fuel injection system through a connecting line; the engine controller is used to control and monitor the operating state of the engine and send CAN information to interact with the third-party aftertreatment controller; the third-party aftertreatment controller is used to monitor and control the DPF regeneration fuel injection system; and send CAN information to interact with the engine controller; the DPF regeneration fuel injection system is used to inject fuel to increase the exhaust gas temperature after receiving the control information of the third-party aftertreatment controller, so as to achieve the regeneration of the DPF. It solves the problems of technical limitations and product singularity of the engine controller.

Description

Technical Field

[0001] The present invention relates to the technical field of diesel engine emission control, and particularly relates to a diesel engine and third-party aftertreatment DPF regeneration interaction system and method. Background Art

[0002] With the development of science and technology and the progress of human society, the emission standards for motor vehicle pollutants have been continuously improved. In order to meet the emission standards, a DPF (diesel particulate filter) has been added to the exhaust gas treatment system. As time goes by, the amount of particulate matter accumulated in the DPF will increase. When it increases to a certain amount, it is necessary to inject fuel into the exhaust gas to increase the temperature and regenerate the DPF.

[0003] When the vehicle manufacturer selects third-party aftertreatment, the engine controller does not need to control the DPF regeneration fuel injection system, but the third-party aftertreatment controller needs to control it. At this time, the engine controller also needs to enter the regeneration state. Therefore, an interaction between the engine controller and the third-party aftertreatment controller is required. Summary of the Invention

[0004] When the vehicle manufacturer selects third-party aftertreatment, the engine controller does not need to control the DPF regeneration fuel injection system, but the third-party aftertreatment controller needs to control it. At this time, the engine controller also needs to enter the regeneration state. Therefore, an interaction between the engine controller and the third-party aftertreatment controller is required. The present invention provides a diesel engine and third-party aftertreatment DPF regeneration interaction system and method.

[0005] In a first aspect, the technical solution of the present invention provides a diesel engine and third-party aftertreatment DPF regeneration interaction system, including an engine controller, a third-party aftertreatment controller, and a DPF regeneration fuel injection system;

[0006] The engine controller and the third-party aftertreatment controller are connected through a CAN line to achieve information transmission;

[0007] The third-party aftertreatment controller is connected to the DPF regeneration fuel injection system through a connecting line;

[0008] The engine controller is used to control and monitor the operating state of the engine and send CAN information to interact with the third-party aftertreatment controller;

[0009] The third-party aftertreatment controller is used to monitor and control the DPF regeneration fuel injection system; and send CAN information to interact with the engine controller;

[0010] The DPF regeneration fuel injection system is used to inject fuel to increase the exhaust gas temperature after receiving the control information from the third-party aftertreatment controller, so as to realize the regeneration of the DPF.

[0011] As a further limitation of the technical solution of the present invention, the engine controller includes a first information processing module and an exhaust temperature increasing module;

[0012] The first information processing module is configured to, after receiving the first CAN message, determine whether the current engine state allows regeneration. If the conditions are met, send the second CAN message indicating that the current engine state allows regeneration to a third-party aftertreatment controller;

[0013] The exhaust temperature increasing module is configured to, after receiving the third CAN message, control the engine to enter the first heating stage and reply with the fourth CAN message representing the current engine state to the third-party aftertreatment controller; after receiving the fifth CAN message, control the engine to enter the second heating stage and reply with the sixth CAN message representing the current engine state to the third-party aftertreatment controller; after receiving the seventh CAN message, control the engine to enter the regeneration stage and reply with the eighth CAN message representing the current engine state to the third-party aftertreatment controller; after receiving the ninth CAN message, control the engine to enter the cooling stage and reply with the tenth CAN message representing the current engine state to the third-party aftertreatment controller; after receiving the eleventh CAN message, control the engine to enter the normal mode and reply with the twelfth CAN message representing the current engine state of the engine to the third-party aftertreatment controller.

[0014] As a further limitation of the technical solution of the present invention, the third-party aftertreatment controller includes an aftertreatment information processing module and an exhaust temperature monitoring module;

[0015] The exhaust temperature monitoring module is configured to judge whether the regeneration conditions are met. If the conditions are met, send the first CAN message requesting to enter the regeneration state to the engine controller; after the end of the first heating stage, send the fifth CAN message requesting to enter the second heating stage to the engine controller; after the end of the second heating stage, send the seventh CAN message requesting to enter the regeneration stage to the engine controller;

[0016] The aftertreatment information processing module is configured to, after receiving the second CAN message, enter the regeneration control state and send the third CAN message requesting to enter the first heating stage to the engine controller; after the end of the cooling stage, send the eleventh CAN message requesting to enter the normal mode to the engine controller.

[0017] In a second aspect, the technical solution of the present invention provides a method for the interaction between a diesel engine and a third-party aftertreatment DPF regeneration, which is applied to the system described in the first aspect. The method includes the following steps:

[0018] S1: The third-party aftertreatment controller detects whether the regeneration conditions are met. If the conditions are met, send the first CAN message requesting to enter the regeneration state to the engine controller;

[0019] S2: After the engine controller receives the first CAN message, it detects the current engine state and determines whether the current engine state allows regeneration. If the conditions are met, it sends the second CAN message indicating that the current engine state allows regeneration to the third-party aftertreatment controller.

[0020] S3: After the third-party aftertreatment controller receives the second CAN message, the third-party aftertreatment controller enters the regeneration control state and sends a CAN message requesting to enter the heating stage to the engine controller; the engine controller controls the engine to enter the heating stage and replies with a CAN message representing the current engine state to the third-party aftertreatment controller.

[0021] S4: After the end of the second heating stage, the third-party aftertreatment controller sends the seventh CAN message requesting to enter the regeneration stage to the engine controller;

[0022] S5: The engine controller controls the engine to enter the regeneration stage and replies with an eighth CAN message representing the current engine state to the third-party aftertreatment controller.

[0023] S6: The third-party aftertreatment controller interacts with the DPF regeneration fuel injection system to control the DPF regeneration fuel system, enters the regeneration state, and after the end of the regeneration stage, sends a ninth CAN message requesting to enter the cooling state to the engine controller;

[0024] S7: The engine controller controls the engine to enter the cooling stage and replies with a tenth CAN message representing the current engine state to the third-party aftertreatment controller.

[0025] S8: After the end of the cooling stage, the third-party aftertreatment controller sends an eleventh CAN message requesting to enter the normal mode to the engine controller;

[0026] S9: The engine controller controls the engine to enter the normal mode and replies with a twelfth CAN message representing the current engine state to the third-party aftertreatment controller.

[0027] As a further limitation of the technical solution of the present invention, after the third-party aftertreatment controller receives the second CAN message, the third-party aftertreatment controller enters the regeneration control state and sends a CAN message requesting to enter the heating stage to the engine controller; the step that the engine controller controls the engine to enter the heating stage and replies with a CAN message representing the current engine state to the third-party aftertreatment controller includes:

[0028] S31: After the third-party aftertreatment controller receives the second CAN message, the third-party aftertreatment controller enters the regeneration control state and sends the third CAN message requesting to enter the first heating stage to the engine controller;

[0029] S32: The engine controller controls the engine to enter the first heating stage and sends back the fourth CAN message representing the current engine state to the third-party aftertreatment controller.

[0030] S33: After the first heating stage ends, the third-party aftertreatment controller sends the fifth CAN message requesting to enter the second heating stage to the engine controller.

[0031] S34: The engine controller controls the engine to enter the second heating stage and sends back the sixth CAN message representing the current engine state to the third-party aftertreatment controller.

[0032] As a further limitation of the technical solution of the present invention, the method further includes:

[0033] When the third-party aftertreatment controller performs the regeneration condition detection, if the conditions are not met, regeneration is not allowed to enter.

[0034] As a further limitation of the technical solution of the present invention, the method further includes:

[0035] When the engine controller performs the regeneration condition detection, if the conditions are not met, regeneration is not allowed to enter.

[0036] As a further limitation of the technical solution of the present invention, the method further includes:

[0037] The exhaust temperature monitoring module of the third-party aftertreatment controller detects whether the regeneration conditions are met. If the conditions are met, it sends the first CAN message requesting to enter the regeneration state to the engine controller.

[0038] After the first information processing module of the engine controller receives the first CAN message, it detects the current state of the engine and determines whether the current engine state allows regeneration to enter. If the conditions are met, it sends the second CAN message indicating that the current engine state allows regeneration to enter to the third-party aftertreatment controller.

[0039] As a further limitation of the technical solution of the present invention, the method further includes:

[0040] After the third-party aftertreatment controller receives the second CAN message, the aftertreatment information processing module enters the regeneration control state and sends the third CAN message requesting to enter the first heating stage to the engine controller.

[0041] The exhaust temperature increase module controls the engine to enter the first heating stage and sends back the fourth CAN message representing the current engine state to the third-party aftertreatment controller.

[0042] After the first heating stage is completed, the exhaust temperature monitoring module sends the fifth CAN message to the engine controller requesting to enter the second heating stage;

[0043] The exhaust temperature enhancement module controls the engine to enter the second stage of heating, and replies to the third-party post-processing controller with the sixth CAN message representing the current engine status;

[0044] After the second heating phase is completed, the exhaust temperature monitoring module sends the seventh CAN message engine controller requesting to enter the regeneration phase;

[0045] The exhaust temperature enhancement module controls the engine to enter the regeneration phase and replies to the third-party after-processing controller with the eighth CAN message representing the current engine status.

[0046] As a further limitation of the technical solution of the present invention, the method further includes:

[0047] The exhaust temperature enhancement module controls the engine to enter the cooling stage and replies the tenth CAN message representing the current engine status to the third-party post-processing controller;

[0048] After the cooling phase is over, the post-processing information processing module sends the eleventh CAN message requesting to enter the normal mode to the engine controller;

[0049] The exhaust temperature enhancement module controls the engine to enter the normal mode and replies to the third-party after-processing controller with the twelfth CAN message representing the current state of the engine.

[0050] It can be seen from the above technical solutions that the present invention has the following advantages: through the third-party post-processing DPF regeneration interactive system, the DPF regeneration process matching the third-party post-processing is realized, the diesel engine can be matched with the third-party post-processing, and the technical limitations of the engine controller and the single product problem are solved. Provide a technical solution for vehicle manufacturers to independently develop third-party post-processing without engine controllers.

[0051] In addition, the invention has a reliable design principle, a simple structure and a very broad application prospect.

[0052] It can be seen that compared with the prior art, the present invention has outstanding substantive features and significant progress, and the beneficial effects of its implementation are also obvious. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] 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 work.

[0054] Figure 1 It is a schematic block diagram of the device according to an embodiment of the present invention.

[0055] Figure 2 It is a schematic flowchart of the method according to an embodiment of the present invention. Detailed implementation manners

[0056] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0057] As Figure 1 shown, the embodiment of the present invention provides a diesel engine and third-party post-treatment DPF regeneration interaction system, including an engine controller, a third-party post-treatment controller, and a DPF regeneration fuel injection system;

[0058] The engine controller and the third-party post-treatment controller are connected through a CAN line to achieve information transmission;

[0059] The third-party post-treatment controller is connected to the DPF regeneration fuel injection system through a connection line;

[0060] The engine controller is used to control and monitor the operating state of the engine and send CAN information to interact with the third-party post-treatment controller;

[0061] The third-party post-treatment controller is used to monitor and control the DPF regeneration fuel injection system; and send CAN information to interact with the engine controller;

[0062] The DPF regeneration fuel injection system is used to inject fuel to increase the exhaust gas temperature after receiving the control information from the third-party post-treatment controller, so as to achieve the regeneration of the DPF.

[0063] The specific interaction process is as follows:

[0064] SS1. The third-party post-treatment controller judges whether the regeneration condition is reached. If the condition is met, it sends the first CAN message to the engine controller to request to enter the regeneration state;

[0065] SS2. The engine controller judges whether the current engine state is running to enter regeneration. If the condition is met, it sends the second CAN message to the third-party post-treatment controller to reply the current engine state and allow entering regeneration;

[0066] SS3. After the third-party post-processing controller receives the second CAN message, it enters the regeneration control state, sends the third CAN message, and requests to enter the first heating stage;

[0067] SS4. The engine controller controls the engine to enter the first heating stage and replies with the fourth CAN message to indicate the engine state at this time;

[0068] SS5. After the first heating stage ends according to the algorithm, the third-party post-processing controller sends the fifth CAN message and requests to enter the second heating stage;

[0069] SS6. The engine controller controls the engine to enter the second heating stage and replies with the sixth CAN message to indicate the engine state at this time;

[0070] SS7. After the second heating stage ends according to the algorithm, the third-party post-processing controller sends the seventh CAN message and requests to enter the regeneration stage;

[0071] SS8. The engine controller controls the engine to enter the regeneration stage and replies with the eighth CAN message to indicate the engine state at this time;

[0072] SS9. According to the algorithm, the third-party post-processing controller controls the DPF regeneration fuel system, enters the regeneration state, and after the regeneration stage ends, sends the ninth CAN message and requests to enter the cooling state;

[0073] SS10. The engine controller controls the engine to enter the cooling stage and replies with the tenth CAN message to indicate the engine state at this time;

[0074] SS11. After the cooling stage ends according to the algorithm, the third-party post-processing controller sends the eleventh CAN message and requests to enter the normal mode;

[0075] SS12. The engine controller controls the engine to enter the normal mode and replies with the twelfth CAN message to indicate the engine state at this time.

[0076] In some embodiments, the engine controller includes a first information processing module and an exhaust temperature boosting module;

[0077] The first information processing module is configured to, after receiving the first CAN message, determine whether the current engine state allows entering regeneration. If the conditions are met, send the second CAN message indicating that the current engine state allows entering regeneration to the third-party post-processing controller;

[0078] The exhaust temperature boosting module is used to control the engine to enter the first heating stage after receiving the third CAN message, and reply with the fourth CAN message representing the current engine state to the third-party aftertreatment controller; control the engine to enter the second heating stage after receiving the fifth CAN message, and reply with the sixth CAN message representing the current engine state to the third-party aftertreatment controller; control the engine to enter the regeneration stage after receiving the seventh CAN message, and reply with the eighth CAN message representing the current engine state to the third-party aftertreatment controller; control the engine to enter the cooling stage after receiving the ninth CAN message, and reply with the tenth CAN message representing the current engine state to the third-party aftertreatment controller; control the engine to enter the normal mode after receiving the eleventh CAN message, and reply with the twelfth CAN message representing the current engine state to the third-party aftertreatment controller.

[0079] The third-party aftertreatment controller includes an aftertreatment information processing module and an exhaust temperature monitoring module;

[0080] The exhaust temperature monitoring module is used to judge whether the regeneration condition is met. If the condition is satisfied, send the first CAN message requesting to enter the regeneration state to the engine controller; after the end of the first heating stage, send the fifth CAN message requesting to enter the second heating stage to the engine controller; after the end of the second heating stage, send the seventh CAN message requesting to enter the regeneration stage to the engine controller;

[0081] The aftertreatment information processing module is used to enter the regeneration control state after receiving the second CAN message, and send the third CAN message requesting to enter the first heating stage to the engine controller; after the end of the cooling stage, send the eleventh CAN message requesting to enter the normal mode to the engine controller.

[0082] The specific interaction process is as follows:

[0083] S1. The exhaust temperature monitoring module of the third-party aftertreatment controller judges whether the regeneration condition is met. If the condition is satisfied, send the first CAN message to the engine controller to request to enter the regeneration state;

[0084] S2. The first information processing module of the engine controller judges whether the current engine state is running into regeneration. If the condition is satisfied, send the second CAN message to the third-party aftertreatment controller to reply with the current engine state and allow entering the regeneration;

[0085] S3. After the third-party aftertreatment controller receives the second CAN message, the aftertreatment information processing module enters the regeneration control state and sends the third CAN message to request to enter the first heating stage;

[0086] S4. The exhaust temperature boosting module of the engine controller controls the engine to enter the first heating stage and replies with the fourth CAN message to indicate the engine state at this time;

[0087] S5. After the first heating stage ends, the exhaust temperature monitoring module of the third-party aftertreatment controller sends the fifth CAN message to request entering the second heating stage;

[0088] S6. The exhaust temperature boosting module of the engine controller controls the engine to enter the second heating stage and replies with the sixth CAN message to indicate the engine state at this time;

[0089] S7. After the second heating stage ends, the exhaust temperature monitoring module of the third-party aftertreatment controller sends the seventh CAN message to request entering the regeneration stage;

[0090] S8. The exhaust temperature boosting module of the engine controller controls the engine to enter the regeneration stage and replies with the eighth CAN message to indicate the engine state at this time;

[0091] S9. The exhaust temperature monitoring module and the fuel injection module of the third-party aftertreatment controller perform DPF regeneration fuel system control to enter the regeneration state, and after the regeneration stage ends, send the ninth CAN message to request entering the cooling state;

[0092] S10. The exhaust temperature boosting module of the engine controller controls the engine to enter the cooling stage and replies with the tenth CAN message to indicate the engine state at this time;

[0093] S11. After the cooling stage ends, the aftertreatment information processing module of the third-party aftertreatment controller sends the eleventh CAN message to request entering the normal mode;

[0094] S12. The exhaust temperature boosting module of the engine controller controls the engine to enter the normal mode and replies with the twelfth CAN message to indicate the engine state at this time.

[0095] As Figure 2 shown, the embodiment of the present invention provides a method for diesel engine and third-party aftertreatment DPF regeneration interaction, and the method includes the following steps:

[0096] S1: The third-party aftertreatment controller detects whether the regeneration condition is reached. If the condition is met, it sends the first CAN message requesting to enter the regeneration state to the engine controller;

[0097] S2: After receiving the first CAN message, the engine controller detects the current engine state and judges whether the current engine state allows entering the regeneration. If the condition is met, it sends the second CAN message indicating that the current engine state allows entering the regeneration to the third-party aftertreatment controller;

[0098] S3: After the third-party post-processing controller receives the second CAN message, the third-party post-processing controller enters the regeneration control state and sends a CAN message requesting to enter the heating stage to the engine controller; the engine controller controls the engine to enter the heating stage and replies with a CAN message representing the current engine state to the third-party post-processing controller;

[0099] S4: After the end of the second heating stage, the third-party post-processing controller sends the seventh CAN message requesting to enter the regeneration stage to the engine controller;

[0100] S5: The engine controller controls the engine to enter the regeneration stage and replies with the eighth CAN message representing the current engine state to the third-party post-processing controller;

[0101] S6: The third-party post-processing controller interacts with the DPF regeneration fuel injection system to control the DPF regeneration fuel system, enters the regeneration state, and after the end of the regeneration stage, sends the ninth CAN message requesting to enter the cooling state to the engine controller;

[0102] S7: The engine controller controls the engine to enter the cooling stage and replies with the tenth CAN message representing the current engine state to the third-party post-processing controller;

[0103] S8: After the end of the cooling stage, the third-party post-processing controller sends the eleventh CAN message requesting to enter the normal mode to the engine controller;

[0104] S9: The engine controller controls the engine to enter the normal mode and replies with the twelfth CAN message representing the current engine state to the third-party post-processing controller.

[0105] Here, after the third-party post-processing controller receives the second CAN message, the steps that the third-party post-processing controller enters the regeneration control state, sends a CAN message requesting to enter the heating stage to the engine controller, and the engine controller controls the engine to enter the heating stage and replies with a CAN message representing the current engine state to the third-party post-processing controller include:

[0106] S31: After the third-party post-processing controller receives the second CAN message, the third-party post-processing controller enters the regeneration control state and sends the third CAN message requesting to enter the first heating stage to the engine controller;

[0107] S32: The engine controller controls the engine to enter the first heating stage and replies with the fourth CAN message representing the current engine state to the third-party post-processing controller;

[0108] S33: After the end of the first heating stage, the third-party aftertreatment controller sends the fifth CAN message requesting to enter the second heating stage to the engine controller;

[0109] S34: The engine controller controls the engine to enter the second heating stage and replies with the sixth CAN message representing the current engine state to the third-party aftertreatment controller.

[0110] It should be noted that when the third-party aftertreatment controller performs the regeneration condition detection, if the conditions are not met, entry into regeneration is not allowed.

[0111] When the engine controller performs the regeneration condition detection, if the conditions are not met, entry into regeneration is not allowed.

[0112] Although the present invention has been described in detail by referring to the accompanying drawings and in combination with the preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, those of ordinary skill in the art can make various equivalent modifications or substitutions to the embodiments of the present invention, and these modifications or substitutions should all fall within the scope of the present invention. / Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A diesel engine and third-party aftertreatment DPF regeneration interaction system, characterized in that, it includes an engine controller, a third-party aftertreatment controller, and a DPF regeneration fuel injection system; The engine controller and the third-party aftertreatment controller are connected through a CAN line to achieve information transmission; The third-party aftertreatment controller is connected to the DPF regeneration fuel injection system through a connection line; The engine controller is used to control and monitor the operating state of the engine and send CAN information to interact with the third-party aftertreatment controller; The third-party aftertreatment controller is used to monitor and control the DPF regeneration fuel injection system; and send CAN information to interact with the engine controller; The DPF regeneration fuel injection system is used to inject fuel to increase the exhaust gas temperature after receiving the control information from the third-party aftertreatment controller, so as to achieve the regeneration of the DPF; The engine controller includes a first information processing module and an exhaust temperature increase module; The first information processing module is used to judge whether the current engine state allows regeneration after receiving the first CAN message. If the condition is met, it sends the second CAN message indicating that the current engine state allows regeneration to the third-party aftertreatment controller; The exhaust temperature increase module is used to control the engine to enter the first heating stage after receiving the third CAN message, and reply with the fourth CAN message representing the current engine state to the third-party aftertreatment controller; control the engine to enter the second heating stage after receiving the fifth CAN message, and reply with the sixth CAN message representing the current engine state to the third-party aftertreatment controller; control the engine to enter the regeneration stage after receiving the seventh CAN message, and reply with the eighth CAN message representing the current engine state to the third-party aftertreatment controller; control the engine to enter the cooling stage after receiving the ninth CAN message, and reply with the tenth CAN message representing the current engine state to the third-party aftertreatment controller; control the engine to enter the normal mode after receiving the eleventh CAN message, and reply with the twelfth CAN message representing the current engine state of the engine to the third-party aftertreatment controller; The third-party aftertreatment controller includes a post-treatment information processing module and an exhaust temperature monitoring module; The exhaust temperature monitoring module is used to judge whether the regeneration condition is met. If the condition is met, it sends the first CAN message requesting to enter the regeneration state to the engine controller; after the end of the first heating stage, it sends the fifth CAN message requesting to enter the second heating stage to the engine controller; after the end of the second heating stage, it sends the seventh CAN message requesting to enter the regeneration stage to the engine controller; The post-treatment information processing module is used to enter the regeneration control state after receiving the second CAN message, and send the third CAN message requesting to enter the first heating stage to the engine controller; after the end of the cooling stage, it sends the eleventh CAN message requesting to enter the normal mode to the engine controller.

2. A diesel engine and third-party aftertreatment DPF regeneration interaction method, characterized in that, the method is applied to the system described in claim 1, and the method includes the following steps: S1: The third-party post-processing controller detects whether the regeneration condition is met. If the condition is satisfied, it sends the first CAN message requesting to enter the regeneration state to the engine controller; S2: After receiving the first CAN message, the engine controller detects the current engine state and determines whether the current engine state allows entry into regeneration. If the condition is satisfied, it sends the second CAN message indicating that the current engine state allows entry into regeneration to the third-party post-processing controller; S3: After receiving the second CAN message, the third-party post-processing controller enters the regeneration control state and sends the CAN message requesting to enter the heating stage to the engine controller; The engine controller controls the engine to enter the heating stage and replies with the CAN message representing the current engine state to the third-party post-processing controller; S4: After the end of the second heating stage, the third-party post-processing controller sends the seventh CAN message requesting to enter the regeneration stage to the engine controller; S5: The engine controller controls the engine to enter the regeneration stage and replies with the eighth CAN message representing the current engine state to the third-party post-processing controller; S6: The third-party post-processing controller interacts with the DPF regeneration fuel injection system to control the DPF regeneration fuel system, enters the regeneration state, and after the end of the regeneration stage, sends the ninth CAN message requesting to enter the cooling state to the engine controller; S7: The engine controller controls the engine to enter the cooling stage and replies with the tenth CAN message representing the current engine state to the third-party post-processing controller; S8: After the end of the cooling stage, the third-party post-processing controller sends the eleventh CAN message requesting to enter the normal mode to the engine controller; S9: The engine controller controls the engine to enter the normal mode and replies with the twelfth CAN message representing the current engine state of the engine to the third-party post-processing controller; After receiving the second CAN message, the third-party post-processing controller enters the regeneration control state and sends the CAN message requesting to enter the heating stage to the engine controller; The steps for the engine controller to control the engine to enter the heating stage and reply with the CAN message representing the current engine state to the third-party post-processing controller include: S31: After receiving the second CAN message, the third-party post-processing controller enters the regeneration control state and sends the third CAN message requesting to enter the first heating stage to the engine controller; S32: The engine controller controls the engine to enter the first heating stage and replies with the fourth CAN message representing the current engine state to the third-party post-processing controller; S33: After the end of the first heating stage, the third-party post-processing controller sends the fifth CAN message requesting to enter the second heating stage to the engine controller; S34: The engine controller controls the engine to enter the second heating stage and replies with the sixth CAN message representing the current engine state to the third-party post-processing controller; The method further includes: When the third-party post-processing controller performs the regeneration condition detection, if the condition is not met, entry into regeneration is not allowed.

3. The method for the interaction between a diesel engine and a third-party post-treatment DPF regeneration according to claim 2, characterized in that, the method further includes: When the engine controller performs regeneration condition detection, if the conditions are not met, regeneration is not allowed to enter.

4. The method for the interaction between a diesel engine and a third-party post-treatment DPF regeneration according to claim 3, characterized in that, the method further includes: The exhaust temperature monitoring module of the third-party post-treatment controller detects whether the regeneration conditions are met. If the conditions are met, it sends the first CAN message requesting to enter the regeneration state to the engine controller; After receiving the first CAN message, the first information processing module of the engine controller detects the current state of the engine, determines whether the current engine state allows regeneration to enter. If the conditions are met, it sends the second CAN message indicating that the current engine state allows regeneration to enter to the third-party post-treatment controller.

5. The method for the interaction between a diesel engine and a third-party post-treatment DPF regeneration according to claim 4, characterized in that, the method further includes: After receiving the second CAN message, the post-treatment information processing module of the third-party post-treatment controller enters the regeneration control state and sends the third CAN message requesting to enter the first heating stage to the engine controller; The exhaust temperature boosting module controls the engine to enter the first heating stage and replies with the fourth CAN message representing the current engine state to the third-party post-treatment controller; After the first heating stage ends, the exhaust temperature monitoring module sends the fifth CAN message requesting to enter the second heating stage to the engine controller; The exhaust temperature boosting module controls the engine to enter the second heating stage and replies with the sixth CAN message representing the current engine state to the third-party post-treatment controller; After the second heating stage ends, the exhaust temperature monitoring module sends the seventh CAN message requesting to enter the regeneration stage to the engine controller; The exhaust temperature boosting module controls the engine to enter the regeneration stage and replies with the eighth CAN message representing the current engine state to the third-party post-treatment controller.

6. The method for the interaction between a diesel engine and a third-party post-treatment DPF regeneration according to claim 5, characterized in that, the method further includes: The exhaust temperature boosting module controls the engine to enter the cooling stage and replies with the tenth CAN message representing the current engine state to the third-party post-treatment controller; After the cooling stage ends, the post-treatment information processing module sends the eleventh CAN message requesting to enter the normal mode to the engine controller; The exhaust temperature boosting module controls the engine to enter the normal mode and replies with the twelfth CAN message representing the current engine state of the engine to the third-party post-treatment controller.

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