Engine cylinder cleaning control method, device and equipment and storage medium

Abstract

The invention discloses an engine cylinder cleaning control method, device and equipment and a storage medium, and relates to the technical field of automobile power system.The engine cylinder cleaning control method comprises the steps that when a vehicle rolling signal is obtained, the state of an engine cylinder is determined; when it is determined that the engine air cylinder state is that engine oil enters the engine air cylinder, an engine is forbidden to start, and a generator is controlled to drag the engine to run at a preset speed; recording a dragging torque, wherein the dragging torque is a torque for maintaining the engine to run at the preset speed; and when the dragging torque is smaller than a preset torque threshold value, engine cylinder cleaning control is completed. After the vehicle rolls over, the situation that engine oil enters an engine cylinder is detected and processed in time, and the engine is prevented from being damaged. By controlling the generator to drag the engine to discharge engine oil and monitoring the dragging torque, it is ensured that the engine can be safely started after the cylinder cleaning process is completed, and the vehicle safety and the engine reliability are improved.

Description

Technical Field

[0001] The present application relates to the field of automobile power system control technology, and in particular to an engine cylinder cleaning control method, device, equipment and storage medium. Background Art

[0002] When a hybrid vehicle (such as HEV, PHEV, REV, etc.) rolls over or overturns, the oil in the oil pan may seep into the engine cylinder. If the engine is started at this time, the oil in the combustion chamber may cause the connecting rod and piston to bend or even break, seriously damaging the engine. Therefore, how to effectively protect the engine after a rollover accident and prevent failures caused by oil entering the cylinder is an important requirement to ensure vehicle safety and engine life.

[0003] At present, most hybrid vehicles usually trigger the emergency shutdown and locking procedures of the vehicle system through airbag signals or vehicle posture sensors after a rollover accident. These systems will immediately stop the engine and disable the high-voltage battery power supply when a rollover signal is detected. Some vehicles will also allow the engine to start after the rollover is reset and ensure the engine safety by manually checking the oil condition.

[0004] Although the existing method can prevent the engine from starting immediately after a rollover accident, the judgment and processing of whether the oil has entered the cylinder depends on manual inspection, which is complicated and time-consuming. In addition, failure to timely and effectively remove the oil in the cylinder may still cause mechanical failure of the engine when starting. This manual operation increases the operational risk and is not conducive to quickly restoring the normal operation of the vehicle. Therefore, how to complete automatic cylinder cleaning when detecting that the oil has entered the cylinder has become an urgent problem to be solved. Summary of the invention

[0005] The purpose of the present application is to provide an engine cylinder cleaning control method, device, equipment and storage medium, aiming to solve the technical problem of completing automatic cylinder cleaning when oil is detected to have entered the cylinder.

[0006] To achieve the above objectives, the present application proposes an engine cylinder cleaning control method, the method comprising:

[0007] When a vehicle rollover signal is obtained, determining the state of the engine cylinder;

[0008] When it is determined that the engine cylinder state is that oil has entered the engine cylinder, the engine is prohibited from starting, and the generator is controlled to drive the engine to run at a preset speed;

[0009] recording a drag torque, wherein the drag torque is a torque for maintaining the engine running at the preset speed;

[0010] When the drag torque is less than a preset torque threshold, the engine cylinder clearing control is completed.

[0011] In one embodiment, obtaining a vehicle rollover signal includes:

[0012] When it is detected that the airbag is in an activated state and the vehicle acceleration exceeds a preset acceleration threshold, it is determined that a vehicle rollover signal is obtained.

[0013] In one embodiment, determining the engine cylinder state includes:

[0014] When the vehicle body pitch angle is greater than the preset pitch angle, the vehicle body roll angle is greater than the preset roll angle, the vehicle body yaw angle is greater than the preset yaw angle, and the duration is greater than the preset time threshold, the engine cylinder state is that oil enters the engine cylinder;

[0015] When any one of the following conditions is met: the vehicle body pitch angle is less than or equal to the preset pitch angle, the vehicle body roll angle is less than or equal to the preset roll angle, the vehicle body yaw angle is less than or equal to the preset yaw angle, and the duration is less than or equal to the preset time threshold, the engine cylinder state is that the engine oil has not entered the engine cylinder.

[0016] In one embodiment, after the engine cylinder state is that the engine oil has not entered the engine cylinder, the method further includes:

[0017] Switch the vehicle system to accessory mode, switch the vehicle system to accessory mode, prohibit the power supply of the high-voltage battery, and prohibit the engine from starting;

[0018] The whole vehicle is powered off and then powered on twice, allowing the power supply of the high-voltage battery to be prohibited and the engine to be started.

[0019] In one embodiment, the engine is prohibited from starting, and the generator is controlled to drive the engine to run at a preset speed, including:

[0020] Switch the vehicle system to accessory mode, prohibit the power supply of the high-voltage battery, and prohibit the engine from starting;

[0021] Performing two vehicle power-off and power-on operations to allow the prohibition of the high-voltage battery power supply;

[0022] A preset speed is obtained, and the generator is controlled to drive the engine to operate at the preset speed.

[0023] In one embodiment, when the drag torque is less than a preset torque threshold, the engine cylinder clearing control is completed, including:

[0024] Get the preset torque threshold,

[0025] acquiring the drag torque;

[0026] When the drag torque is less than the preset torque threshold, turning off the generator and stopping the engine;

[0027] The command prohibiting the engine from starting is cancelled, and the engine cylinder clearing control is completed.

[0028] In one embodiment, after obtaining the drag torque, the method further includes:

[0029] Obtaining a preset target time threshold and an operating time, wherein the operating time is the time during which the engine operates at the preset speed;

[0030] When the operation time does not reach a preset target time threshold, maintaining the generator to drive the engine to operate at the preset speed;

[0031] When the operating time reaches a preset target time threshold, an alarm is sent and the entire vehicle is powered off.

[0032] In addition, to achieve the above purpose, the present application also proposes an engine cylinder cleaning control device, the device comprising:

[0033] A determination module, used to determine the state of the engine cylinder when a vehicle rollover signal is obtained;

[0034] A control module, for prohibiting the engine from starting when determining that the engine cylinder state is that oil has entered the engine cylinder, and controlling the generator to drive the engine to run at a preset speed;

[0035] A recording module, used for recording a drag torque, wherein the drag torque is a torque for maintaining the engine running at the preset speed;

[0036] The completion module is used to complete the engine cylinder clearing control when the drag torque is less than a preset torque threshold.

[0037] In addition, to achieve the above-mentioned purpose, the present application also proposes an engine cylinder clearing control device, which includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, and the computer program is configured to implement the steps of the engine cylinder clearing control method as described above.

[0038] In addition, to achieve the above-mentioned purpose, the present application also proposes a storage medium, which is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by the processor, the steps of the engine cylinder clearing control method as described above are implemented.

[0039] In addition, to achieve the above-mentioned purpose, the present application also provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, the steps of the engine cylinder clearing control method as described above are implemented.

[0040] One or more technical solutions proposed in this application have at least the following technical effects:

[0041] When the vehicle rollover signal is obtained, the engine cylinder state is determined; when it is determined that the engine cylinder state is that the oil has entered the engine cylinder, the engine is prohibited from starting, and the generator is controlled to drag the engine at a preset speed; the drag torque is recorded, and the drag torque is the torque to maintain the engine running at the preset speed; when the drag torque is less than the preset torque threshold, the engine cylinder cleaning control is completed. The present application first detects the rollover signal of the vehicle, and can timely identify and determine whether the vehicle has a rollover accident, and provide trigger conditions for subsequent protection measures, which ensures that the engine can be effectively protected at critical moments; then, once it is confirmed that the oil has entered the cylinder, the engine is immediately prohibited from starting to avoid mechanical damage caused by the burning of the oil in the cylinder, such as bending or breaking of the connecting rod and piston, thereby protecting the core components of the engine; then, by dragging the engine at a low speed through the generator, the oil entering the cylinder can be slowly discharged back to the oil pan, avoiding the oil remaining in the cylinder and reducing the potential risk when the engine is started; and then by recording and monitoring the changes in the drag torque, the system can evaluate the effect of the cylinder cleaning process in real time. As the oil is gradually cleared, the drag torque will gradually decrease, which provides a reliable basis for judging whether the cylinder cleaning is completed; finally, when the drag torque drops below the preset threshold, it indicates that the oil has been basically cleared and the cylinder cleaning process is completed. At this time, the restrictions on engine start can be lifted to ensure that the engine can start safely and resume normal operation. Through this series of steps, the entire system of this application can automatically detect and handle the situation where oil enters the cylinder after a vehicle rollover accident, preventing mechanical failures caused by oil residue when the engine starts. After determining that the oil has been cleared, the system allows the engine to restart to ensure engine safety and normal operation of the vehicle. This automated cylinder cleaning control scheme effectively improves vehicle safety after an accident, reduces dependence on manual operation, and improves the reliability of the vehicle under extreme conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0043] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0044] Figure 1 A flow chart of the first embodiment of the engine cylinder cleaning control method of the present application;

[0045] Figure 2 A flow chart of the second embodiment of the engine cylinder cleaning control method of the present application;

[0046] Figure 3 A schematic diagram of a simplified flow chart of an engine cylinder cleaning control method according to an embodiment of the present application;

[0047] Figure 4 This is a schematic diagram of the module structure of the engine cylinder cleaning control device according to an embodiment of the present application;

[0048] Figure 5 Schematic diagram of the device structure of the hardware operating environment involved in the engine cylinder cleaning control method in the embodiment of the present application.

[0049] The purpose, features and advantages of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0050] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application and are not used to limit the present application.

[0051] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0052] When a hybrid vehicle rolls over or overturns, oil may seep into the engine cylinder. If the engine is started at this time, it may cause damage to the connecting rod and piston. Therefore, protecting the engine from damage caused by oil entering the cylinder is an important requirement. At present, hybrid vehicles usually trigger the emergency shutdown system through airbag signals or vehicle posture sensors to stop the engine and disable the high-voltage battery. Some vehicles allow the engine to start after the rollover is reset and ensure safety by manually checking the oil condition. However, this method relies on manual inspection, which is complicated and time-consuming. It fails to effectively and timely remove the oil in the cylinder, which may cause mechanical failure at startup. Therefore, how to automatically detect the situation of oil entering the cylinder and efficiently complete the cylinder cleaning process has become an urgent problem to be solved.

[0053] The main solution of the embodiment of the present application is: first, determine whether the vehicle has rolled over by detecting the rollover signal to provide trigger conditions for protective measures. After confirming that the oil has entered the cylinder, the engine is immediately prohibited from starting to prevent engine damage due to oil combustion. Then, the generator drags the engine at a low speed, slowly drains the oil back to the oil pan, and evaluates the cylinder cleaning effect by recording the dragging torque. When the dragging torque drops below the preset threshold, the cylinder cleaning process is completed and the engine can be started safely. This automated cylinder cleaning control scheme effectively improves the safety of the vehicle after a rollover and reduces dependence on manual operation.

[0054] It should be noted that the execution subject of the embodiment of the present application may be a computing service device with data processing, network communication and program running functions, such as a tablet computer, a personal computer, a mobile phone, etc., or an electronic device capable of realizing the above functions, etc. The following takes a terminal equipped with an engine cylinder cleaning control system as an example to illustrate this embodiment and the following embodiments.

[0055] Based on this, the embodiment of the present application provides an engine cylinder cleaning control method, referring to Figure 1 , Figure 1 This is a flow chart of the first embodiment of the engine cylinder cleaning control method of the present application.

[0056] In this embodiment, the engine cylinder cleaning control method includes steps S10 to S40:

[0057] Step S10, when a vehicle rollover signal is obtained, determining the state of the engine cylinder;

[0058] It should be noted that the vehicle rollover signal refers to the relevant signal detected by the system when the vehicle rolls over or overturns. These signals usually come from airbag sensors, acceleration sensors or other vehicle posture sensors, and are used to determine whether the vehicle is in a rollover state. The engine cylinder state refers to whether there is oil or other abnormal conditions in the engine cylinder.

[0059] It is understandable that after obtaining the vehicle rollover signal, it is first necessary to confirm whether the vehicle has indeed experienced a rollover accident. This process usually involves the use of sensors and control units to evaluate the vehicle's posture, including the pitch angle of the vehicle body. If these posture parameters exceed the preset threshold and last for more than a certain period of time, the system will determine that the vehicle has rolled over. Next, the system further checks whether there is oil infiltration inside the engine cylinder. By analyzing the vehicle's rollover situation and related sensor data, the system can accurately determine whether there is oil infiltration in the engine cylinder, providing a basis for subsequent protection measures and cylinder cleaning operations.

[0060] As an example, obtaining a vehicle rollover signal includes: when it is detected that the airbag is in an activated state and the vehicle acceleration exceeds a preset acceleration threshold, determining that the vehicle rollover signal is obtained.

[0061] Among them, airbags refer to safety devices used to protect occupants in vehicles. In the event of a collision or sudden change, the airbags will quickly inflate and deploy to provide additional protection for occupants and reduce injuries. The start-up state refers to the state in which the airbag system is activated or triggered. Vehicle acceleration refers to the rate of change of the vehicle's speed per unit time. It measures the degree of acceleration or deceleration of the vehicle and is very important for detecting whether the vehicle has experienced violent movement or an accident. The preset acceleration threshold refers to an acceleration value set by the system. When the vehicle acceleration exceeds this value, the system will determine that the vehicle may have rolled over or collided. This threshold is set based on the vehicle's design and test data to ensure that the system can respond accurately in actual accidents.

[0062] Specifically, the airbag activation status is first detected. When the vehicle rolls over, the airbag is usually triggered and activated. At the same time, the system also needs to monitor the vehicle's acceleration. If the acceleration exceeds the preset threshold, it means that the vehicle is experiencing drastic dynamic changes, which is usually related to rollover or severe collision. Combining the airbag activation status and the vehicle's acceleration information, the system can accurately determine whether the vehicle has rolled over, thereby obtaining a rollover signal. These signals provide a key basis for subsequent safety protection and treatment measures.

[0063] Step S20, when it is determined that the engine cylinder state is that the oil has entered the engine cylinder, the engine is prohibited from starting, and the generator is controlled to drive the engine to run at a preset speed;

[0064] It should be noted that a generator refers to an electric motor used to drive the engine at a specific speed in an automobile system. When the engine cannot start on its own, the generator provides drag force to help the engine run at a low speed, thereby performing the necessary cylinder cleaning operation. In this case, the generator plays an auxiliary role to maintain the engine operation until the oil in the cylinder is cleared and the cylinder cleaning conditions are met. The preset speed refers to the specific speed set by the generator when it is dragging the engine. This speed is pre-configured by the system to ensure that the engine can run at a stable low speed so that the oil entering the cylinder can be effectively discharged. At this preset speed, the generator will continue to drag the engine until the oil in the cylinder is cleared and the cylinder cleaning conditions are met.

[0065] It is understandable that when it is determined that oil has entered the engine cylinder, the engine will be immediately prohibited from starting to prevent the oil from burning in the combustion chamber and causing damage to the connecting rod and piston. At the same time, the generator is started and set to run at a preset low speed. The generator drags the engine at this low speed to make it run slowly, thereby gradually draining the oil that has entered the cylinder back to the oil pan. This control measure ensures that the oil in the cylinder has been effectively cleared before the engine can be safely started, preventing mechanical failures caused by oil burning during startup.

[0066] As an example, determining the engine cylinder state includes: when the vehicle body pitch angle is greater than a preset pitch angle, the vehicle body roll angle is greater than a preset roll angle, the vehicle body yaw angle is greater than a preset yaw angle, and the duration is greater than a preset time threshold, the engine cylinder state is that oil enters the engine cylinder; when the vehicle body pitch angle is less than or equal to the preset pitch angle, the vehicle body roll angle is less than or equal to the preset roll angle, the vehicle body yaw angle is less than or equal to the preset yaw angle, and the duration is less than or equal to the preset time threshold, any one of the following is satisfied, the engine cylinder state is that oil does not enter the engine cylinder.

[0067] Among them, the pitch angle of the vehicle refers to the tilt angle of the vehicle in the front-to-back direction, that is, the tilt degree of the front end of the vehicle relative to the horizontal plane. This angle will change when the vehicle is driving up or down a slope or braking suddenly. The preset pitch angle is a threshold angle set by the system to determine whether the tilt of the vehicle in the front-to-back direction exceeds the normal range. If the pitch angle of the vehicle exceeds this preset value, the system will think that the vehicle may have rolled over or other violent movements. The yaw angle of the vehicle refers to the tilt angle of the vehicle in the left-to-right direction, that is, the rotation angle of the vehicle body around the vertical axis. This angle will change when the vehicle turns sharply or under the influence of crosswinds. The preset yaw angle is a threshold angle set by the system to determine whether the tilt of the vehicle in the left-to-right direction exceeds the normal range. If the yaw angle of the vehicle exceeds this preset value, the system will think that the vehicle may have seriously tilted or rolled over. The duration refers to the length of time that the pitch angle, roll angle and yaw angle of the vehicle body continue to maintain this state after exceeding the preset value. This time is used to confirm whether the vehicle has actually experienced a rollover or other abnormal situation. The preset time threshold is a time length set by the system to determine whether the body posture continues to exceed the normal range. If the vehicle body posture exceeds the above preset angle for longer than this threshold, the system will consider that the vehicle has rolled over or tilted severely.

[0068] Specifically, when judging the state of the engine cylinder, the system monitors multiple posture angles of the vehicle: the pitch angle, the roll angle, and the yaw angle. If these posture angles exceed their respective preset thresholds, and the vehicle maintains this state for longer than the preset time threshold, the system will determine that oil has entered the engine cylinder. This is because these posture angles indicate that the vehicle may have experienced a severe rollover or rollover, causing the oil to enter the cylinder from the oil pan. On the contrary, it means that the vehicle posture is normal and the oil has not entered the cylinder. Such a judgment ensures that further cylinder cleaning will only be carried out in the case of a rollover or extreme posture, and under normal circumstances, the engine cylinder state is considered safe.

[0069] As an example, after the engine cylinder state is that the engine oil has not entered the engine cylinder, it also includes: switching the entire vehicle system to accessory mode, switching the entire vehicle system to accessory mode, prohibiting the power supply of the high-voltage battery, and prohibiting the engine from starting; performing the operation of powering off and then powering on the entire vehicle twice, allowing the prohibition of the power supply of the high-voltage battery and allowing the engine to start.

[0070] Among them, the accessory mode, Accessory Mode, is an operating mode of the vehicle, in which the vehicle's engine is not started, but some electrical systems (such as car audio, display screen, etc.) can still be used. This mode is usually used in situations where the in-vehicle electrical equipment needs to be used for a short time but the engine does not need to be started. In other words, the accessory mode provides a limited power supply without involving the operation of the engine. High-voltage batteries generally refer to battery packs used to drive vehicles in hybrid vehicles (such as HEV, PHEV, etc.) and electric vehicles. Compared with the 12V battery of a traditional car, the high-voltage battery has a higher voltage (usually hundreds of volts) and is used to power electric motors and other high-power systems. It is the energy source that provides the main power during the vehicle's driving process. Power-off refers to the process of shutting down the power supply of the vehicle system, especially the power of the high-voltage battery is cut off, so that the system enters a low-power or shutdown state. This is usually an operation performed for safety, especially when an accident occurs or a system inspection is required. Power-on refers to the process of restarting or restoring power supply, that is, the system is reconnected to the power supply to restore the vehicle's high-voltage battery and other electrical systems to a working state. This is usually done after ensuring system safety, troubleshooting, or completing inspections, allowing the vehicle to re-enter normal operating mode.

[0071] Specifically, when it is determined that no oil has entered the engine cylinder, the vehicle system will first be switched to accessory mode. Accessory mode is usually used to allow some electronic devices in the vehicle to operate without starting the engine. Next, the system will send an instruction to prohibit the power supply of the high-voltage battery, and further send an instruction to prohibit the engine from starting. This is to ensure that the vehicle's power system will not start accidentally before safety is confirmed. After that, the system will perform two power-off and power-on operations of the vehicle. Power-off means completely disconnecting the vehicle's power supply, while power-on restores the power supply. The purpose of this operation is to reset the system state and ensure that all control modules can be reinitialized and synchronized to achieve the purpose of safe startup. Through these two operations, the system will release the prohibition instruction on the power supply of the high-voltage battery and the prohibition instruction on the engine start. At this time, the vehicle returns to normal state, allowing the engine to start and continue to run. This process ensures that the vehicle can safely return to normal operation after confirming that no oil has entered the cylinder.

[0072] As an example, the engine is prohibited from starting, and the generator is controlled to drag the engine to run at a preset speed, including: switching the entire vehicle system to accessory mode, prohibiting the power supply of the high-voltage battery, and prohibiting the engine from starting; performing the operation of powering off and then powering on the entire vehicle twice, allowing the prohibition of the power supply of the high-voltage battery; obtaining the preset speed, and controlling the generator to drag the engine to run at the preset speed.

[0073] Specifically, when oil enters the engine cylinder after a rollover accident, the vehicle system is first switched to accessory mode. In this mode, the engine will not start, and only some electronic devices in the vehicle are allowed to operate to ensure safety. Next, the system will prohibit the power supply of the high-voltage battery and further prohibit the engine from starting to prevent the engine from accidentally starting before the safety check is completed, resulting in potential mechanical damage. Subsequently, the system will perform two power-off and power-on operations for the entire vehicle. This process will completely disconnect the vehicle's power supply and restart the system, ensuring that all control modules can be properly reset and allowing the power supply of the high-voltage battery to be restored. Finally, the system obtains a preset towing speed and controls the engine to run at this speed through the generator. The purpose of this low-speed towing operation is to gradually drain the oil that has seeped into the cylinder back to the oil pan by slowly running the engine while ensuring safety, thereby avoiding mechanical failures caused by oil residue.

[0074] Step S30, recording the drag torque, where the drag torque is the torque for maintaining the engine running at the preset speed;

[0075] It should be noted that the drag torque refers to the torque that needs to be applied when the generator drags the engine to run at a preset speed. This torque reflects the force required for the generator to overcome the internal resistance of the engine (such as piston movement and oil friction). By recording and monitoring the changes in the drag torque, the removal of the oil in the cylinder can be determined. As the oil is gradually removed, the internal resistance of the engine decreases, and the drag torque will also decrease accordingly. Therefore, the drag torque can be used as a key indicator to judge the progress and completion of cylinder cleaning.

[0076] It is understandable that the torque required for the generator to drag the engine to run is recorded in real time, which is the so-called drag torque. The size of this torque depends on the resistance inside the engine, such as whether there is oil residue in the cylinder. By recording and monitoring this drag torque, the system can judge the internal condition of the engine. Usually, if there is oil in the cylinder, the drag torque will be larger because the oil increases the resistance of the piston movement. As the generator continues to drag the engine to run, the oil in the cylinder is gradually discharged, and the drag torque will gradually decrease. Therefore, recording the changes in the drag torque can provide data support for the subsequent judgment of whether the cylinder cleaning process is effectively completed, which is also the key basis for finally lifting the engine start restriction.

[0077] Step S40, when the drag torque is less than a preset torque threshold, completing the engine cylinder clearing control.

[0078] It should be noted that the preset torque threshold refers to a pre-set reference value used to determine whether the oil in the engine cylinder has been effectively cleared. Specifically, this threshold is a minimum torque value set by the system. When the drag torque drops below this value, it means that the oil inside the engine has been basically removed and the cylinder resistance has been reduced to a normal level. By comparing the actual recorded drag torque with this preset threshold, the system can confirm whether the cylinder cleaning process is completed, and when the drag torque is less than the threshold, the cylinder cleaning control operation is completed to remove the restriction on engine start.

[0079] It is understandable that when the drag torque drops below the preset torque threshold, it is judged that the engine cylinder cleaning process has been completed. This preset torque threshold is a set standard value used to indicate whether the engine oil has been basically eliminated. If the drag torque is greater than this threshold, it means that there is still a certain resistance inside the engine, which may be because there is still oil residue in the cylinder. The system continuously monitors the drag torque, and as the oil is gradually eliminated, the drag torque will gradually decrease. Once the drag torque is lower than the preset threshold, it means that most of the oil has been discharged and the internal resistance of the engine has been significantly reduced. At this time, the system will automatically confirm that the cylinder cleaning process is complete and lift the restrictions on engine starting to ensure that the engine can be started safely and operate normally.

[0080] This embodiment provides an engine cylinder cleaning control method. The application first determines whether the vehicle has rolled over by detecting a rollover signal to provide trigger conditions for protective measures. After confirming that the engine oil has entered the cylinder, the engine is immediately prohibited from starting to prevent engine damage caused by oil combustion. Then, the generator drags the engine at a low speed, slowly drains the oil back to the oil pan, and evaluates the cylinder cleaning effect by recording the drag torque. When the drag torque drops below the preset threshold, the cylinder cleaning process is completed and the engine can be started safely. This automated cylinder cleaning control scheme effectively improves the safety of the vehicle after a rollover, reduces dependence on manual operation, and improves the reliability of the vehicle under extreme conditions.

[0081] Based on the first embodiment of the present application, in the second embodiment of the present application, the same or similar contents as those in the above-mentioned embodiment 1 can refer to the above introduction, and will not be repeated later. Figure 2 , Figure 2 This is a flow chart of the second embodiment of the engine cylinder cleaning control method of the present application. Step S40 of the engine cylinder cleaning control method includes steps S41 to S44:

[0082] Step S41, obtaining a preset torque threshold;

[0083] It is understandable that a preset torque threshold is first obtained. This value is a standard set by the system during the design phase and is used to determine the completion of the cylinder cleaning process. This threshold provides a reference benchmark for the system. When the drag torque is lower than this preset value, the system can determine that the cylinder cleaning work has been completed, thereby deciding whether to lift the restriction on engine start.

[0084] Step S42, obtaining the drag torque;

[0085] It is understandable that the system will measure and obtain the torque value of the engine under the drag of the generator in real time. Drag torque refers to the torque required to maintain the engine running at a preset speed. This value is monitored in real time by sensors and control systems, and provides information about the internal state of the engine. The magnitude of the drag torque can reflect the resistance of the engine cylinder, such as whether there is oil residue in the cylinder. Obtaining this data is the basis for subsequent cylinder cleaning judgment and processing. By recording and analyzing the drag torque, the system can determine whether the cylinder cleaning process has been effectively completed.

[0086] Step S43, when the drag torque is less than the preset torque threshold, turning off the generator and stopping the engine;

[0087] It is understood that when the system detects that the drag torque is lower than the preset threshold, it means that the oil in the engine has been drained and the resistance has been significantly reduced. The system then shuts down the generator and stops its drag operation on the engine. This means that the generator no longer needs to apply torque to maintain the engine at a low speed. After the generator is shut down, the engine stops running, indicating that the cylinder cleaning process is complete and ready for further restoration of normal engine start and operation.

[0088] Step S44, canceling the instruction to prohibit the engine from starting, and completing the engine cylinder clearing control.

[0089] It is understood that according to the completed engine cylinder cleaning control process, the previous prohibition command on engine start is lifted. This means that the system confirms that the engine has safely handled the oil that may have entered the cylinder and there is no longer a risk of mechanical damage. At this time, the engine can be safely restarted and restored to normal operating conditions, ensuring that the vehicle can quickly and reliably return to normal operating mode after the rollover accident, ensuring the safety of the vehicle and passengers.

[0090] As an example, after obtaining the traction torque, it also includes: obtaining a preset target time threshold and operating time, the operating time being the time for the engine to operate at the preset speed; when the operating time does not reach the preset target time threshold, maintaining the generator to drag the engine at the preset speed; when the operating time reaches the preset target time threshold, sending an alarm and powering off the entire vehicle.

[0091] The preset target time threshold refers to the maximum time limit for the engine to run set by the system. This time threshold is to prevent the generator from continuously dragging the engine to run and causing safety accidents when other extreme conditions occur in the engine. The running time refers to the actual time the engine runs at the preset speed, that is, the duration of the engine being dragged to keep running.

[0092] Specifically, first, the preset target time threshold and operating time are obtained, where the operating time refers to the duration of the engine running at a preset speed. Before the engine operating time reaches the preset target time threshold, the system will continue to control the generator to drag the engine to run at a preset speed to ensure that the engine remains in a safe operating state. Once the operating time reaches the preset target time threshold, the system will trigger an alarm and perform a vehicle power-off operation to avoid potential safety risks, such as deformation of the internal structure of the engine or other extreme situations. This process is designed to ensure that the engine operates stably within a safe operating range and take emergency protection measures when necessary.

[0093] In this embodiment, the set torque threshold is first obtained, and this threshold is used to determine the minimum torque required in the engine cylinder cleaning process; then the torque value required to actually drag the engine to run is obtained, which is the actual force to maintain the engine running at a preset speed; then when the actual drag torque is lower than the preset torque threshold, the system stops the operation of the generator, thereby stopping the operation of the engine, ensuring that the oil has been cleared and avoiding the risk of damage caused by the oil at startup; finally, after confirming that the oil has been effectively cleared, the system lifts the previous restrictions on engine startup, allowing the engine to restart safely, completing the entire engine cylinder cleaning control process. This application ensures that after a rollover accident, the oil that may remain in the engine is effectively handled and removed in an automated manner, thereby ensuring that the engine can be restarted safely and reliably, restoring the normal operating state of the vehicle, and improving the safety and reliability of the vehicle under extreme conditions.

[0094] For example, in order to help understand the implementation process of the engine cylinder cleaning control method obtained by combining this embodiment with the above-mentioned embodiment 1, please refer to Figure 3 , Figure 3 A brief flow chart of an engine cylinder cleaning control method is provided, specifically:

[0095] First, it starts with detecting the vehicle rollover signal, and determines whether the rollover signal is obtained based on the judgment of the airbag activation status and vehicle acceleration. Subsequently, it determines whether the engine cylinder state is oil entering the cylinder based on the changes in the vehicle body pitch angle, roll angle and yaw angle and the duration. If it is confirmed that the oil has entered the cylinder, the system will prohibit the engine from starting, and control the generator to drag the engine at a preset speed, while recording the drag torque. When the drag torque is lower than the preset threshold, the cylinder clearing control is completed; if the oil has not entered the cylinder, the system switches to the accessory mode, prohibits the high-voltage battery from supplying power and the engine from starting, and removes the restriction after two power-offs and power-ons. In addition, the system monitors the engine's operating time to ensure that the generator continues to be dragged when the preset time threshold is not reached. If the threshold is reached, an alarm is sent and the vehicle is powered off to ensure safety.

[0096] It should be noted that the above examples are only used to understand the present application and do not constitute a limitation on the engine cylinder cleaning control method of the present application. More simple transformations based on this technical concept are all within the protection scope of the present application.

[0097] This application also provides an engine cylinder cleaning control device, please refer to Figure 4 , the engine cylinder cleaning control device comprises:

[0098] A determination module 10, for determining the state of the engine cylinder when a vehicle rollover signal is obtained;

[0099] The control module 20 is used to prohibit the engine from starting when it is determined that the engine cylinder state is that oil has entered the engine cylinder, and control the generator to drive the engine to run at a preset speed;

[0100] The recording module 30 is used to record the drag torque, where the drag torque is the torque for maintaining the engine running at the preset speed;

[0101] The completion module 40 is used to complete the engine cylinder clearing control when the drag torque is less than a preset torque threshold.

[0102] The engine cylinder cleaning control device provided by the present application adopts the engine cylinder cleaning control method in the above embodiment, and can solve the technical problem of completing automatic cylinder cleaning when detecting that engine oil has entered the cylinder. Compared with the prior art, the beneficial effects of the engine cylinder cleaning control device provided by the present application are the same as the beneficial effects of the engine cylinder cleaning control method provided by the above embodiment, and other technical features in the engine cylinder cleaning control device are the same as the features disclosed in the above embodiment method, which will not be repeated here.

[0103] The present application provides an engine cylinder cleaning control device, which includes: at least one processor; and a memory that is 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 so that the at least one processor can execute the engine cylinder cleaning control method in the above-mentioned embodiment one.

[0104] Reference below Figure 5 , which shows a schematic diagram of the structure of an engine cylinder cleaning control device suitable for implementing the embodiment of the present application. The engine cylinder cleaning control device in the embodiment of the present application may include but is not limited to mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. Figure 5 The engine cylinder cleaning control device shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0105] like Figure 5As shown, the engine cylinder cleaning control device may include a processing device 1001 (such as a central processing unit, a graphics processor, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM: Read Only Memory) 1002 or a program loaded from a storage device 1003 to a random access memory (RAM: Random Access Memory) 1004. In RAM1004, various programs and data required for the operation of the engine cylinder cleaning control device are also stored. The processing device 1001, ROM1002 and RAM1004 are connected to each other through a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Generally, the following systems can be connected to the I / O interface 1006: an input device 1007 including, for example, a touch screen, a touch pad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; an output device 1008 including, for example, a liquid crystal display (LCD: Liquid Crystal Display), a speaker, a vibrator, etc.; a storage device 1003 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 1009. The communication device 1009 can allow the engine cleaning cylinder control device to communicate wirelessly or wired with other devices to exchange data. Although the engine cleaning cylinder control device with various systems is shown in the figure, it should be understood that it is not required to implement or have all the systems shown. More or fewer systems can be implemented or provided alternatively.

[0106] In particular, according to the embodiments disclosed in the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication device, or installed from a storage device 1003, or installed from a ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.

[0107] The engine cylinder cleaning control device provided by the present application adopts the engine cylinder cleaning control method in the above embodiment, which can solve the technical problem of completing automatic cylinder cleaning when detecting that engine oil has entered the cylinder. Compared with the prior art, the beneficial effects of the engine cylinder cleaning control method device provided by the present application are the same as the beneficial effects of the engine cylinder cleaning control method provided by the above embodiment, and the other technical features in the engine cylinder cleaning control device are the same as the features disclosed in the method of the previous embodiment, which will not be repeated here.

[0108] It should be understood that the various parts disclosed in this application can be implemented by hardware, software, firmware or a combination thereof. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0109] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0110] The present application provides a computer-readable storage medium having computer-readable program instructions (ie, computer programs) stored thereon, the computer-readable program instructions being used to execute the engine cylinder clearing control method in the above-mentioned embodiment.

[0111] The computer-readable storage medium provided in the present application may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, systems or devices, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, system or device. The program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination of the above.

[0112] The computer-readable storage medium may be included in the engine cylinder cleaning control device; or may exist independently without being assembled into the engine cylinder cleaning control device.

[0113] The above-mentioned computer-readable storage medium carries one or more programs. When the above-mentioned one or more programs are executed by the engine cylinder cleaning control device, the engine cylinder cleaning control device: determines the engine cylinder state when a vehicle rollover signal is obtained; when it is determined that the engine cylinder state is that oil enters the engine cylinder, prohibits the engine from starting, and controls the generator to drag the engine to run at a preset speed; records the drag torque, which is the torque that maintains the engine running at the preset speed; and completes the engine cylinder cleaning control when the drag torque is less than a preset torque threshold.

[0114] Computer program code for performing the operations of the present application may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0115] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present application. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0116] The modules involved in the embodiments described in this application may be implemented by software or hardware, wherein the name of the module does not constitute a limitation on the unit itself in some cases.

[0117] The readable storage medium provided in the present application is a computer-readable storage medium, which stores computer-readable program instructions (i.e., computer programs) for executing the above-mentioned engine cylinder cleaning control method, and can solve the technical problem of completing automatic cylinder cleaning when oil is detected to enter the cylinder. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in the present application are the same as the beneficial effects of the engine cylinder cleaning control method provided in the above-mentioned embodiment, and will not be elaborated here.

[0118] The present application also provides a computer program product, including a computer program, which implements the steps of the above-mentioned engine cylinder clearing control method when executed by a processor.

[0119] The computer program product provided by the present application can solve the technical problem of automatically cleaning the cylinder when oil is detected to have entered the cylinder. Compared with the prior art, the beneficial effects of the computer program product provided by the present application are the same as those of the engine cylinder cleaning control method provided by the above embodiment, and will not be elaborated here.

[0120] The above descriptions are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present application.

Claims

1. An engine cylinder cleaning control method, characterized in that: The method comprises: When a vehicle rollover signal is obtained, determining the state of the engine cylinder; When it is determined that the engine cylinder state is that oil has entered the engine cylinder, the engine is prohibited from starting, and the generator is controlled to drive the engine to run at a preset speed; recording a drag torque, wherein the drag torque is a torque for maintaining the engine running at the preset speed; When the drag torque is less than a preset torque threshold, the engine cylinder clearing control is completed.

2. The method according to claim 1, characterized in that The obtaining of the vehicle rollover signal comprises: When it is detected that the airbag is in an activated state and the vehicle acceleration exceeds a preset acceleration threshold, it is determined that a vehicle rollover signal is obtained.

3. The method according to claim 1, characterized in that The determining of the engine cylinder state comprises: When the vehicle body pitch angle is greater than the preset pitch angle, the vehicle body roll angle is greater than the preset roll angle, the vehicle body yaw angle is greater than the preset yaw angle, and the duration is greater than the preset time threshold, the engine cylinder state is that oil enters the engine cylinder; When any one of the following conditions is met: the vehicle body pitch angle is less than or equal to the preset pitch angle, the vehicle body roll angle is less than or equal to the preset roll angle, the vehicle body yaw angle is less than or equal to the preset yaw angle, and the duration is less than or equal to the preset time threshold, the engine cylinder state is that the engine oil has not entered the engine cylinder.

4. The method according to claim 3, characterized in that After the engine cylinder state is that the engine oil has not entered the engine cylinder, the method further includes: Switch the vehicle system to accessory mode, prohibit the power supply of the high-voltage battery, and prohibit the engine from starting; The whole vehicle is powered off and then powered on twice, allowing the power supply of the high-voltage battery to be prohibited and the engine to be started.

5. The method according to claim 1, characterized in that The method of prohibiting the engine from starting and controlling the generator to drive the engine to run at a preset speed includes: Switch the vehicle system to accessory mode, prohibit the power supply of the high-voltage battery, and prohibit the engine from starting; Performing two vehicle power-off and power-on operations to allow the prohibition of the high-voltage battery power supply; A preset speed is obtained, and the generator is controlled to drive the engine to operate at the preset speed.

6. The method according to claim 1, characterized in that When the drag torque is less than a preset torque threshold, the engine cylinder clearing control is completed, including: Get the preset torque threshold, acquiring the drag torque; When the drag torque is less than the preset torque threshold, turning off the generator and stopping the engine; The command prohibiting the engine from starting is cancelled, and the engine cylinder clearing control is completed.

7. The method according to claim 6, characterized in that After obtaining the drag torque, the method further includes: Obtaining a preset target time threshold and an operating time, wherein the operating time is the time during which the engine operates at the preset speed; When the operation time does not reach a preset target time threshold, maintaining the generator to drive the engine to operate at the preset speed; When the operating time reaches a preset target time threshold, an alarm is sent and the entire vehicle is powered off.

8. An engine cylinder cleaning control device, characterized in that: The device comprises: A determination module, used to determine the state of the engine cylinder when a vehicle rollover signal is obtained; A control module, for prohibiting the engine from starting when determining that the engine cylinder state is that oil has entered the engine cylinder, and controlling the generator to drive the engine to run at a preset speed; A recording module, used for recording a drag torque, wherein the drag torque is a torque for maintaining the engine running at the preset speed; The completion module is used to complete the engine cylinder clearing control when the drag torque is less than a preset torque threshold.

9. An engine cylinder cleaning control device, characterized in that: The device comprises: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program is configured to implement the steps of the engine cylinder clearing control method according to any one of claims 1 to 7.

10. A storage medium, characterized in that: The storage medium is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, the steps of the engine cylinder clearing control method according to any one of claims 1 to 7 are implemented.

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