A method and device for protecting a supercharger of an engine

Abstract

The application discloses an engine supercharger protection control method and device, and relates to the field of engines and related systems, which comprises the following steps: obtaining the operation duration after engine starting, the engine main oil passage oil pressure and the engine coolant temperature in the engine starting state; comparing the operation duration after engine starting, the engine main oil passage oil pressure and the engine coolant temperature with the set values to limit the maximum engine speed and the maximum circulating oil supply at each engine speed. The application can effectively protect the engine supercharger bearing and avoid the wear and tear and fracture failure of the engine supercharger bearing.

Description

Technical Field

[0001] This invention relates to the field of engines and related systems, and specifically to a method and device for protecting and controlling an engine turbocharger. Background Technology

[0002] Currently, turbochargers are commonly used in engines to improve their operating efficiency. Turbochargers effectively increase the engine's intake air volume, thereby improving combustion efficiency and reducing fuel consumption. During engine operation, the turbocharger rotates at extremely high speeds, making its bearings prone to wear and fatigue fracture. Current methods primarily address this by pumping engine oil during operation to lubricate the turbocharger bearings, reducing friction, and optimizing the turbocharger bearing lubrication structure to improve lubrication effectiveness, thus preventing wear and fatigue failures.

[0003] While existing turbocharger lubrication systems can provide some protection for the bearings, they also have some drawbacks. When an engine transitions from a stopped state to a running state, it takes time for the engine oil to flow from the oil pan to the turbocharger bearings. If the turbocharger bearings operate at high speeds during this period, wear failures can easily occur. This is especially true for brand-new engines, where there is no residual engine oil in the turbocharger bearings, making them prone to dry friction failures during this time (the higher the turbocharger speed, the more likely friction failures will occur). Furthermore, this failure is also relatively easy to produce for engines and vehicles that have not been used for a long time.

[0004] It is evident that during the initial stage of engine startup, the turbocharger bearing may not be adequately lubricated due to insufficient engine oil. If the turbocharger speed is too high, it can easily cause wear on the turbocharger bearing, thereby damaging the turbocharger and incurring unnecessary repair costs. Summary of the Invention

[0005] In view of the deficiencies in the existing technology, the purpose of this invention is to provide an engine turbocharger protection control method and device, which can effectively protect the engine turbocharger bearing and avoid engine turbocharger bearing wear and breakage failure.

[0006] To achieve the above objectives, the present invention provides an engine turbocharger protection control method, which specifically includes the following steps:

[0007] With the engine running, acquire the duration of engine operation after starting, the engine main oil passage oil pressure, and the engine coolant temperature.

[0008] Based on the comparison of the engine's running duration after starting, the engine's main oil passage oil pressure, and the engine coolant temperature with the set values, the maximum engine speed and the maximum circulating oil supply at each engine speed are limited.

[0009] Based on the above technical solution, before obtaining the engine's running duration after starting, the engine's main oil passage oil pressure, and the engine coolant temperature, the following is also included:

[0010] Set the minimum safe operating duration value based on the engine model and the current ambient temperature;

[0011] Based on the engine model and current ambient temperature, set the minimum safe main oil passage oil pressure value;

[0012] Set the minimum safe coolant temperature value based on the engine model and the current ambient temperature.

[0013] Based on the above technical solution, in the engine starting state, the following steps are taken to obtain the engine starting duration, engine main oil passage oil pressure, and engine coolant temperature:

[0014] After the engine starts, the ECU records the duration of engine operation after starting;

[0015] The engine main oil passage oil pressure is obtained by testing with an oil pressure sensor.

[0016] The engine coolant temperature is obtained by testing with a water temperature sensor.

[0017] Based on the above technical solution, the step of limiting the maximum engine speed and the maximum circulating oil supply at each engine speed by comparing the engine's running duration after starting, the engine's main oil passage oil pressure, and the engine coolant temperature with set values, includes the following steps:

[0018] The engine's running time after starting is compared with the set minimum safe running time value; the engine's main oil passage pressure is compared with the set minimum safe main oil passage pressure value; and the engine coolant temperature is compared with the set minimum safe coolant temperature value. Based on the comparison results:

[0019] If the engine's running time after starting is less than the set minimum safe running time, the engine's main oil passage oil pressure is less than the set minimum safe main oil passage oil pressure, and the engine coolant temperature is less than the set minimum safe coolant temperature, then the engine's maximum speed will be limited based on the set speed setting, and the maximum circulating oil supply at each engine speed will be limited according to the engine model.

[0020] If the engine runs for a period of time after starting and is not less than the set minimum safe running time, the engine main oil passage oil pressure is not less than the set minimum safe main oil passage oil pressure, or the engine coolant temperature is not less than the set minimum safe coolant temperature, then no action will be taken.

[0021] Based on the above technical solution, the limitation on the maximum engine speed and the maximum circulating fuel supply at each engine speed is specifically as follows:

[0022] The maximum engine speed is limited, and the maximum circulating fuel supply of the engine is also limited based on the set maximum circulating fuel supply corresponding to each engine speed.

[0023] Based on the above technical solutions,

[0024] The set speed setting is based on the current engine model;

[0025] The maximum circulating fuel supply is set according to the current engine speed.

[0026] Based on the above technical solutions, after limiting the maximum engine speed, the following additional steps are included:

[0027] Continue to acquire and compare the engine's running duration after starting, the engine's main oil passage oil pressure, and the engine coolant temperature:

[0028] If the engine's running time after starting is not less than the set minimum safe running time value, the engine's main oil passage oil pressure is not less than the set minimum safe main oil passage oil pressure value, or the engine coolant temperature is not less than the set minimum safe coolant temperature value, then the limitation on the engine's maximum speed and the limitation on the maximum circulating oil supply at each engine speed will be lifted.

[0029] If the engine's running time after starting is less than the set minimum safe running time, the engine's main oil passage oil pressure is less than the set minimum safe main oil passage oil pressure, and the engine coolant temperature is less than the set minimum safe coolant temperature, then the maximum engine speed will continue to be limited, as will the maximum circulating oil supply at each engine speed.

[0030] The present invention provides an engine turbocharger protection control device, comprising:

[0031] The acquisition module is used to acquire the engine running duration, engine main oil passage oil pressure and engine coolant temperature after the engine starts running, when the engine is in the starting state.

[0032] The execution module is used to limit the maximum engine speed and the maximum circulating oil supply at each engine speed by comparing the engine's running duration after starting, the engine's main oil passage oil pressure, and the engine coolant temperature with set values.

[0033] Based on the above technical solution, before obtaining the engine's running duration after starting, the engine's main oil passage oil pressure, and the engine coolant temperature, the following is also included:

[0034] Set the minimum safe operating duration value based on the engine model and the current ambient temperature;

[0035] Based on the engine model and current ambient temperature, set the minimum safe main oil passage oil pressure value;

[0036] Set the minimum safe coolant temperature value based on the engine model and the current ambient temperature.

[0037] Based on the above technical solution, in the engine starting state, the operating duration after engine start-up, the engine main oil passage oil pressure, and the engine coolant temperature are obtained. The specific process includes:

[0038] After the engine starts, the ECU records the duration of engine operation after starting;

[0039] The engine main oil passage oil pressure is obtained by testing with an oil pressure sensor.

[0040] The engine coolant temperature is obtained by testing with a water temperature sensor.

[0041] Compared with the prior art, the advantages of the present invention are as follows: By acquiring the running duration of the engine after starting, the engine main oil passage oil pressure, and the engine coolant temperature during the engine starting state, and then comparing the running duration of the engine after starting, the engine main oil passage oil pressure, and the engine coolant temperature with the set values, the maximum engine speed is limited. That is, by judging the state of the engine in the early stage of starting, it is confirmed whether the turbocharger bearing needs special control and protection. After confirming that the engine turbocharger bearing needs to enter the protection mode, the maximum engine speed is controlled to control the maximum operating speed of the engine turbocharger bearing. At the same time, the maximum fuel injection quantity at each speed can be limited, thereby achieving the purpose of protecting the engine turbocharger bearing and avoiding wear and breakage of the engine turbocharger bearing. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 This is a flowchart of an engine turbocharger protection control method according to an embodiment of the present invention. Detailed Implementation

[0044] This invention provides a method for protecting and controlling an engine turbocharger. By acquiring the engine's running duration, main oil pressure, and coolant temperature during engine startup, and comparing these parameters with set values, the method limits the engine's maximum speed. Specifically, by assessing the engine's initial startup state, it determines whether the turbocharger bearing requires special protection. If protection is needed, the maximum engine speed is controlled to regulate the turbocharger bearing's maximum operating speed. Simultaneously, the maximum fuel injection quantity at each speed is limited, thereby protecting the turbocharger bearing and preventing wear and breakage. This invention also provides a corresponding engine turbocharger protection and control device.

[0045] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0046] See Figure 1 As shown in the figure, an engine turbocharger protection control method provided by an embodiment of the present invention specifically includes the following steps:

[0047] S1: When the engine is running, acquire the duration of engine operation after starting, the engine main oil passage oil pressure and the engine coolant temperature.

[0048] In this invention, before obtaining the engine's operating duration after starting, the engine's main oil passage oil pressure, and the engine coolant temperature, the following steps are also included:

[0049] Set the minimum safe operating duration value based on the engine model and the current ambient temperature;

[0050] Based on the engine model and current ambient temperature, set the minimum safe main oil passage oil pressure value;

[0051] Set the minimum safe coolant temperature value based on the engine model and the current ambient temperature.

[0052] For example, the relationship between the minimum safe operating duration and ambient temperature for a certain engine is shown in Table 1 below.

[0053] Table 1

[0054]

[0055] In practical applications, the minimum safe operating duration, minimum safe main oil passage pressure, and minimum safe coolant temperature are set according to the specific vehicle model and ambient temperature.

[0056] In this invention, while the engine is running, the operating duration after engine start-up, the engine main oil passage oil pressure, and the engine coolant temperature are obtained. Specific steps include:

[0057] S101: After the engine starts, the ECU (on-board computer) records the duration of engine operation after starting.

[0058] S102: The engine main oil passage oil pressure is obtained by testing with an oil pressure sensor;

[0059] S103: The engine coolant temperature is obtained by testing with a water temperature sensor.

[0060] S2: Based on the comparison between the engine's running duration after starting, the engine's main oil passage oil pressure, and the engine coolant temperature and the set values, the maximum engine speed and the maximum circulating oil supply at each engine speed are limited.

[0061] In this invention, the maximum engine speed and the maximum circulating oil supply at each engine speed are limited based on a comparison of the engine's running duration after starting, the engine's main oil passage oil pressure, and the engine coolant temperature with set values. Specific steps include:

[0062] The engine's running time after starting is compared with the set minimum safe running time value; the engine's main oil passage pressure is compared with the set minimum safe main oil passage pressure value; and the engine coolant temperature is compared with the set minimum safe coolant temperature value. Based on the comparison results:

[0063] If the engine's running time after starting is less than the set minimum safe running time, the engine's main oil passage oil pressure is less than the set minimum safe main oil passage oil pressure, and the engine coolant temperature is less than the set minimum safe coolant temperature, then the engine's maximum speed will be limited based on the set speed setting, and the maximum circulating oil supply at each engine speed will be limited according to the engine model.

[0064] If the engine runs for a period of time after starting and is not less than the set minimum safe running time, the engine main oil passage oil pressure is not less than the set minimum safe main oil passage oil pressure, or the engine coolant temperature is not less than the set minimum safe coolant temperature, then no action will be taken.

[0065] When the engine starts and runs for a period of time less than the set minimum safe operating time, the engine main oil passage oil pressure is less than the set minimum safe main oil passage oil pressure, and the engine coolant temperature is less than the set minimum safe coolant temperature, the turbocharger bearing protection function is activated, the engine maximum speed enters the limiting mode, limiting the engine maximum speed to not exceed the speed setting value, and at the same time limiting the maximum circulating oil supply at each engine speed.

[0066] Furthermore, the maximum engine speed and the maximum circulating fuel supply at each engine speed are limited. Specifically, the maximum engine speed is limited, and the maximum circulating fuel supply is limited based on the set maximum circulating fuel supply corresponding to each engine speed. That is, the maximum circulating fuel supply is set according to the established correspondence between each engine speed and the maximum circulating fuel supply.

[0067] This means that while limiting the engine's maximum speed, the engine's maximum circulating fuel supply is also limited, thereby limiting the turbocharger's maximum speed to prevent turbocharger bearing wear.

[0068] The set engine speed is based on the current engine model; the set maximum fuel supply is set according to the various engine speeds. In other words, the set maximum fuel supply is related to the engine speed, and the correspondence between the two can be seen in Table 2 below.

[0069] Table 2

[0070]

[0071] This means setting a limit on the maximum engine speed for a specific engine model, and simultaneously setting the corresponding maximum circulating fuel supply at each speed.

[0072] In this invention, after limiting the maximum engine speed, the invention further includes:

[0073] Continue to acquire and compare the engine's running duration after starting, the engine's main oil passage oil pressure, and the engine coolant temperature:

[0074] If the engine's running time after starting is not less than the set minimum safe running time value, the engine's main oil passage oil pressure is not less than the set minimum safe main oil passage oil pressure value, or the engine coolant temperature is not less than the set minimum safe coolant temperature value, then the limitation on the engine's maximum speed and the limitation on the maximum circulating oil supply at each engine speed will be lifted.

[0075] If the engine's running time after starting is less than the set minimum safe running time, the engine's main oil passage oil pressure is less than the set minimum safe main oil passage oil pressure, and the engine coolant temperature is less than the set minimum safe coolant temperature, then the maximum engine speed will continue to be limited, as will the maximum circulating oil supply at each engine speed.

[0076] In practical applications, after limiting the maximum engine speed, the system continues to acquire the engine's running duration after starting, the engine's main oil passage oil pressure, and the engine coolant temperature. If any of these conditions are not met, it indicates that the turbocharger bearing has sufficient lubrication and is relatively safe, requiring no special protection. In this case, the system exits the maximum engine speed limiting mode, the engine speed control enters the normal control path, and the maximum circulating oil supply limit for each speed of the turbocharger is released.

[0077] This invention determines the conditions for entering the turbocharger bearing lubrication protection mode. When the conditions for turbocharger bearing lubrication protection mode are met, the engine is controlled to perform actions. When the turbocharger bearing is fully lubricated, the protection action is deactivated, allowing the engine to fully enter normal operation mode.

[0078] The engine turbocharger protection control method of this invention acquires the engine running duration, engine main oil passage oil pressure, and engine coolant temperature after the engine starts, and then limits the engine's maximum speed based on a comparison of these values ​​with set values. Specifically, by judging the state of the engine in the early stages of starting, it determines whether the turbocharger bearing requires special control and protection. Once it is confirmed that the turbocharger bearing needs to enter protection mode, the maximum engine speed is controlled to limit the maximum operating speed of the turbocharger bearing. Simultaneously, the maximum fuel injection quantity at each speed is limited, thereby protecting the engine turbocharger bearing and preventing wear and breakage.

[0079] In one possible implementation, the present invention also provides a readable storage medium located in a PLC (Programmable Logic Controller) controller, on which a computer program is stored. When executed by a processor, this program implements the steps of the engine turbocharger protection control method described below:

[0080] With the engine running, acquire the duration of engine operation after starting, the engine main oil passage oil pressure, and the engine coolant temperature.

[0081] Based on the comparison of the engine's running duration after starting, the engine's main oil passage oil pressure, and the engine coolant temperature with the set values, the maximum engine speed and the maximum circulating oil supply at each engine speed are limited.

[0082] Storage media may be any combination of one or more computer-readable media. A computer-readable medium may be a computer-readable signal medium or a computer-readable storage medium. Computer-readable storage media may be, for example, but not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatuses, or devices, or any combination thereof. More specific examples (a non-exhaustive list) of computer-readable storage media include: electrical connections having one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof. In this document, a computer-readable storage medium may be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

[0083] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. Computer-readable signal media may also be any computer-readable medium other than computer-readable storage media, capable of transmitting, propagating, or transmitting programs for use by or in connection with an instruction execution system, apparatus, or device. The program code contained on the computer-readable medium may be transmitted using any suitable medium, including but not limited to: wireless, wireline, optical fiber, RF, etc., or any suitable combination thereof.

[0084] Computer program code for performing the operations of this invention can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, as well as conventional procedural programming languages ​​such as "C" or similar languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or it can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0085] An embodiment of the present invention provides an engine turbocharger protection control device, which includes an acquisition module and an execution module.

[0086] The acquisition module is used to acquire the engine running duration, engine main oil passage oil pressure, and engine coolant temperature after the engine starts running. The execution module is used to limit the maximum engine speed and the maximum circulating oil supply at each engine speed based on the comparison between the engine running duration, engine main oil passage oil pressure, and engine coolant temperature after the engine starts running and the set values.

[0087] In this invention, before obtaining the engine's operating duration after starting, the engine's main oil passage oil pressure, and the engine coolant temperature, the following steps are also included:

[0088] Set the minimum safe operating duration value based on the engine model and the current ambient temperature;

[0089] Based on the engine model and current ambient temperature, set the minimum safe main oil passage oil pressure value;

[0090] Set the minimum safe coolant temperature value based on the engine model and the current ambient temperature.

[0091] In this invention, during engine startup, the duration of engine operation, the engine main oil passage oil pressure, and the engine coolant temperature are obtained. The specific process includes:

[0092] After the engine starts, the ECU records the duration of engine operation after starting;

[0093] The engine main oil passage oil pressure is obtained by testing with an oil pressure sensor.

[0094] The engine coolant temperature is obtained by testing with a water temperature sensor.

[0095] In this invention, the maximum engine speed and the maximum circulating oil supply at each engine speed are limited based on a comparison of the engine's running duration after starting, the engine's main oil passage oil pressure, and the engine coolant temperature with set values. The specific process includes:

[0096] The engine's running time after starting is compared with the set minimum safe running time value; the engine's main oil passage pressure is compared with the set minimum safe main oil passage pressure value; and the engine coolant temperature is compared with the set minimum safe coolant temperature value. Based on the comparison results:

[0097] If the engine's running time after starting is less than the set minimum safe running time, the engine's main oil passage oil pressure is less than the set minimum safe main oil passage oil pressure, and the engine coolant temperature is less than the set minimum safe coolant temperature, then the engine's maximum speed will be limited based on the set speed setting, and the maximum circulating oil supply at each engine speed will be limited according to the engine model.

[0098] If the engine runs for a period of time after starting and is not less than the set minimum safe running time, the engine main oil passage oil pressure is not less than the set minimum safe main oil passage oil pressure, or the engine coolant temperature is not less than the set minimum safe coolant temperature, then no action will be taken.

[0099] In this invention, limiting the maximum engine speed and the maximum circulating fuel supply at each engine speed specifically involves limiting the maximum engine speed and limiting the maximum circulating fuel supply of the engine based on the set maximum circulating fuel supply corresponding to each engine speed.

[0100] In this invention, the set speed setting value is set based on the current engine model;

[0101] The maximum circulating fuel supply is set according to the current engine speed.

[0102] In this invention, after limiting the maximum engine speed, the invention further includes:

[0103] Continue to acquire and compare the engine's running duration after starting, the engine's main oil passage oil pressure, and the engine coolant temperature:

[0104] If the engine's running time after starting is not less than the set minimum safe running time value, the engine's main oil passage oil pressure is not less than the set minimum safe main oil passage oil pressure value, or the engine coolant temperature is not less than the set minimum safe coolant temperature value, then the limitation on the engine's maximum speed and the limitation on the maximum circulating oil supply at each engine speed will be lifted.

[0105] If the engine's running time after starting is less than the set minimum safe running time, the engine's main oil passage oil pressure is less than the set minimum safe main oil passage oil pressure, and the engine coolant temperature is less than the set minimum safe coolant temperature, then the maximum engine speed will continue to be limited, as will the maximum circulating oil supply at each engine speed.

[0106] The engine turbocharger protection control device of this invention acquires the engine running duration, engine main oil passage oil pressure, and engine coolant temperature after the engine starts, while the engine is running. Then, based on the comparison between the engine running duration, engine main oil passage oil pressure, and engine coolant temperature and set values, it limits the maximum engine speed. That is, by judging the state of the engine in the early stage of starting, it determines whether the turbocharger bearing needs special control protection. After confirming that the engine turbocharger bearing needs to enter the protection mode, it controls the maximum engine speed to control the maximum operating speed of the engine turbocharger bearing. At the same time, it can also limit the maximum fuel injection quantity at each speed, thereby achieving the purpose of protecting the engine turbocharger bearing and avoiding wear and breakage of the engine turbocharger bearing.

[0107] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

[0108] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

Claims

1. A method for protecting and controlling an engine turbocharger, characterized in that, Specifically, the following steps are included: With the engine running, acquire the duration of engine operation after starting, the engine main oil passage oil pressure, and the engine coolant temperature. Based on the comparison of the engine's running duration after starting, the engine's main oil passage oil pressure, and the engine coolant temperature with the set values, the maximum engine speed and the maximum circulating oil supply at each engine speed are limited. This includes, before obtaining the engine's running duration after starting, the engine's main oil passage oil pressure, and the engine coolant temperature, the following: Set the minimum safe operating duration value based on the engine model and the current ambient temperature; Based on the engine model and current ambient temperature, set the minimum safe main oil passage oil pressure value; Set the minimum safe coolant temperature value based on the engine model and the current ambient temperature; Specifically, in the engine-starting state, the following steps are taken to obtain the engine's running duration, main oil passage oil pressure, and engine coolant temperature: After the engine starts, the ECU records the duration of engine operation after starting; The engine main oil passage oil pressure is obtained by testing with an oil pressure sensor. The engine coolant temperature is obtained by testing with a water temperature sensor; The specific steps for limiting the maximum engine speed and the maximum circulating oil supply at each engine speed, based on the comparison of the engine's running duration after starting, the engine's main oil passage oil pressure, and the engine coolant temperature with set values, include: The engine's running time after starting is compared with the set minimum safe running time value; the engine's main oil passage pressure is compared with the set minimum safe main oil passage pressure value; and the engine coolant temperature is compared with the set minimum safe coolant temperature value. Based on the comparison results: If the engine's running time after starting is less than the set minimum safe running time, the engine's main oil passage oil pressure is less than the set minimum safe main oil passage oil pressure, and the engine coolant temperature is less than the set minimum safe coolant temperature, then the engine's maximum speed will be limited based on the set speed setting, and the maximum circulating oil supply at each engine speed will be limited according to the engine model. If the engine runs for a period of time after starting and is not less than the set minimum safe running time, the engine main oil passage oil pressure is not less than the set minimum safe main oil passage oil pressure, or the engine coolant temperature is not less than the set minimum safe coolant temperature, then no action will be taken.

2. The engine turbocharger protection control method as described in claim 1, characterized in that, The restrictions on the maximum engine speed and the maximum circulating fuel supply at each engine speed are specifically as follows: The maximum engine speed is limited, and the maximum circulating fuel supply of the engine is also limited based on the set maximum circulating fuel supply corresponding to each engine speed.

3. The engine turbocharger protection control method as described in claim 2, characterized in that: The set speed setting is based on the current engine model; The maximum circulating fuel supply is set according to the current engine speed.

4. The engine turbocharger protection control method as described in claim 1, characterized in that, After limiting the engine's maximum speed, the following are also included: Continue to acquire and compare the engine's running duration after starting, the engine's main oil passage oil pressure, and the engine coolant temperature: If the engine's running time after starting is not less than the set minimum safe running time value, the engine's main oil passage oil pressure is not less than the set minimum safe main oil passage oil pressure value, or the engine coolant temperature is not less than the set minimum safe coolant temperature value, then the limitation on the engine's maximum speed and the limitation on the maximum circulating oil supply at each engine speed will be lifted. If the engine's running time after starting is less than the set minimum safe running time, the engine's main oil passage oil pressure is less than the set minimum safe main oil passage oil pressure, and the engine coolant temperature is less than the set minimum safe coolant temperature, then the maximum engine speed will continue to be limited, as will the maximum circulating oil supply at each engine speed.

5. An engine turbocharger protection control device, characterized in that, include: The acquisition module is used to acquire the engine running duration, engine main oil passage oil pressure and engine coolant temperature after the engine starts running, when the engine is in the starting state. The execution module is used to limit the maximum engine speed and the maximum circulating oil supply at each engine speed by comparing the engine's running duration after starting, the engine's main oil passage oil pressure, and the engine coolant temperature with the set values. This includes, before obtaining the engine's running duration after starting, the engine's main oil passage oil pressure, and the engine coolant temperature, the following: Set the minimum safe operating duration value based on the engine model and the current ambient temperature; Based on the engine model and current ambient temperature, set the minimum safe main oil passage oil pressure value; Set the minimum safe coolant temperature value based on the engine model and the current ambient temperature; Specifically, in the engine-starting state, the following steps are taken to obtain the engine's running duration, main oil passage oil pressure, and engine coolant temperature: After the engine starts, the ECU records the duration of engine operation after starting; The engine main oil passage oil pressure is obtained by testing with an oil pressure sensor. The engine coolant temperature is obtained by testing with a water temperature sensor; The specific steps for limiting the maximum engine speed and the maximum circulating oil supply at each engine speed, based on the comparison of the engine's running duration after starting, the engine's main oil passage oil pressure, and the engine coolant temperature with set values, include: The engine's running time after starting is compared with the set minimum safe running time value; the engine's main oil passage pressure is compared with the set minimum safe main oil passage pressure value; and the engine coolant temperature is compared with the set minimum safe coolant temperature value. Based on the comparison results: If the engine's running time after starting is less than the set minimum safe running time, the engine's main oil passage oil pressure is less than the set minimum safe main oil passage oil pressure, and the engine coolant temperature is less than the set minimum safe coolant temperature, then the engine's maximum speed will be limited based on the set speed setting, and the maximum circulating oil supply at each engine speed will be limited according to the engine model. If the engine runs for a period of time after starting and is not less than the set minimum safe running time, the engine main oil passage oil pressure is not less than the set minimum safe main oil passage oil pressure, or the engine coolant temperature is not less than the set minimum safe coolant temperature, then no action will be taken.

Images