Crankcase ventilation system icing diagnosis method, device, electronic equipment and vehicle

Abstract

The present invention provides a crankcase ventilation system icing diagnosis method, device, electronic equipment and vehicle, and relates to the field of vehicle technology. First, the amount of ice in the crankcase ventilation system of the current operating cycle is calculated, and the trend of the change of the amount of ice in the crankcase ventilation system is determined based on the comparison result between the amount of ice in the crankcase ventilation system of the current operating cycle and the amount of ice in the crankcase ventilation system of the previous cycle. Then, based on the trend of the change of the amount of ice, a diagnosis result of the ice level of the crankcase ventilation system is generated. Finally, based on the diagnosis result of the ice level, an ice treatment strategy of the corresponding level is executed. In the present invention, by real-time monitoring of the crankcase ventilation system, determining the corresponding ice severity, and executing different treatment strategies according to the ice severity, the probability of engine failure due to ice in the crankcase ventilation system, which in turn causes an accident, is greatly reduced, thereby ensuring the travel safety of passengers to the greatest extent.

Description

Technical Field

[0001] The present invention relates to the field of vehicle technology, and in particular to a crankcase ventilation system icing diagnosis method, device, electronic equipment and vehicle. Background Art

[0002] During engine operation, high-pressure gases in the cylinders can blowby into the crankcase through the clearance between the piston assembly and the cylinder bore, causing crankcase pressure to rise. The crankcase ventilation system regulates crankcase pressure by directing the crankcase mixture through a connecting pipe to the appropriate location in the intake manifold, returning it to the cylinder for recombustion, thereby reducing crankcase pressure. In winter, in low temperatures, this crankcase blowby gas freezes, reducing or even failing the crankcase ventilation system's regulatory capacity. This causes a sharp rise in crankcase pressure, and in severe cases, can cause the crankshaft oil seal to dislodge, leaking oil and rendering the engine inoperable.

[0003] In the related art, it is impossible to diagnose the degree of icing of the crankcase ventilation system, and it is also impossible to perform corresponding fault processing according to the degree of icing of the crankcase ventilation system. Summary of the Invention

[0004] Embodiments of the present invention provide a crankcase ventilation system icing diagnosis method, device, electronic equipment, and vehicle, aiming to solve or partially solve the problems existing in the background technology.

[0005] In order to solve the above-mentioned technical problems, the present invention is achieved as follows:

[0006] In a first aspect, an embodiment of the present invention provides a method for diagnosing icing in a crankcase ventilation system, the method comprising:

[0007] Calculate the amount of crankcase ventilation system ice for the current operating cycle;

[0008] determining a trend of an amount of ice in the crankcase ventilation system according to a comparison result of an amount of ice in the crankcase ventilation system in the current operating cycle and an amount of ice in the crankcase ventilation system in a previous cycle;

[0009] generating a diagnosis result of an icing level of the crankcase ventilation system according to the icing amount variation trend;

[0010] According to the diagnosis result of the icing level, an icing treatment strategy corresponding to the level is executed.

[0011] Optionally, the ice amount variation trend includes an ice ablation trend and an ice accumulation trend; and the step of generating a diagnosis result of an ice level of the crankcase ventilation system according to the ice amount variation trend includes:

[0012] When the ice amount variation trend is an ice melting trend, generating a corresponding ice melting level diagnosis result according to the threshold range of the crankcase ventilation system ice amount in the current operating cycle;

[0013] When the ice amount variation trend is an ice accumulation trend, a corresponding ice accumulation level diagnosis result is generated according to the threshold range of the crankcase ventilation system ice amount in the current operating cycle.

[0014] Optionally, the ice accumulation levels include a first ice accumulation level, a second ice accumulation level, and a third ice accumulation level; and the step of executing an ice handling strategy corresponding to the ice accumulation level according to the diagnosis result of the ice accumulation level includes:

[0015] When the diagnosis result of the icing level is a first icing accumulation level, executing an engine operating condition adjustment strategy to adjust the engine piston blowby amount;

[0016] When the diagnosis result of the ice level is the second ice accumulation level, an alarm reminder is executed and a takeover reminder is sent to the user;

[0017] When the diagnosis result of the icing level is a third icing accumulation level, an engine power limiting strategy is executed.

[0018] Optionally, the ice ablation levels include a first ice ablation level, a second ice ablation level, and a third ice ablation level; and the step of executing an ice treatment strategy corresponding to the ice ablation level according to the diagnosis result of the ice ablation level includes:

[0019] When the diagnosis result of the icing level is the first ice melting level, exiting the engine power limitation strategy;

[0020] When the diagnosis result of the ice level is the second ice melting level, stopping the alarm reminder;

[0021] When the diagnosis result of the icing level is the third ice melting level, a normal engine operation strategy is executed.

[0022] Optionally, the step of calculating the amount of ice deposited in the crankcase ventilation system during the current operating cycle includes:

[0023] Obtaining operating environment parameters of the vehicle and operating condition parameters of the engine, and determining the operating state of the crankcase ventilation system according to the operating environment parameters and the operating condition parameters;

[0024] determining a corresponding icing rate according to an operating state of the crankcase ventilation system;

[0025] An accumulation and summation are performed according to the freezing rate and the operating time of the operating state to obtain the freezing amount of the crankcase ventilation system in the current operating cycle.

[0026] Optionally, the step of determining a corresponding icing rate according to an operating state of the crankcase ventilation system includes:

[0027] Using the operating state of the crankcase ventilation system as an index, traversing a pre-calibrated icing rate lookup table, and determining an initial icing rate corresponding to the operating state of the crankcase ventilation system in combination with an interpolation algorithm;

[0028] The initial freezing rate is corrected according to a predetermined correction function to obtain a target freezing rate.

[0029] In a second aspect, an embodiment of the present invention provides a crankcase ventilation system icing diagnosis device, the device comprising:

[0030] a calculation module, for calculating the amount of ice in the crankcase ventilation system during a current operating cycle;

[0031] a determination module, configured to determine a trend of an amount of ice in the crankcase ventilation system based on a comparison result of an amount of ice in the crankcase ventilation system in the current operating cycle with an amount of ice in the crankcase ventilation system in a previous cycle;

[0032] a diagnostic module, configured to generate a diagnostic result of an icing level of the crankcase ventilation system according to the icing amount variation trend;

[0033] An execution module is used to execute an icing treatment strategy of a corresponding level according to the diagnosis result of the icing level.

[0034] Optionally, the diagnostic module includes:

[0035] a first diagnostic submodule, configured to generate a corresponding ice ablation level diagnosis result according to a threshold range of ice amount in the crankcase ventilation system during the current operating cycle when the ice amount variation trend is an ice ablation trend;

[0036] The second diagnostic submodule is configured to generate a diagnostic result of a corresponding ice accumulation level according to a threshold range of ice amount in the crankcase ventilation system during the current operating cycle when the ice amount variation trend is an ice accumulation trend.

[0037] The execution module includes:

[0038] a first execution submodule, configured to execute an engine operating condition adjustment strategy to adjust an amount of engine piston blowby when the diagnosis result of the icing level is a first icing accumulation level;

[0039] a second execution submodule, configured to, when the diagnosis result of the icing level is a second icing accumulation level, execute an alarm reminder and send a takeover reminder to a user;

[0040] The third execution submodule is configured to execute an engine power limitation strategy when the diagnosis result of the icing level is a third icing accumulation level.

[0041] Optionally, the diagnosis module further includes:

[0042] a fourth execution submodule, configured to exit the engine power limitation strategy when the diagnosis result of the icing level is the first ice melting level;

[0043] a fifth execution submodule, configured to stop the alarm reminder when the diagnosis result of the ice level is the second ice melting level;

[0044] The sixth execution submodule is configured to execute a normal engine operation strategy when the diagnosis result of the icing level is the third ice melting level.

[0045] Optionally, the calculation module includes:

[0046] a crankcase ventilation system operating state determination submodule, configured to obtain vehicle operating environment parameters and engine operating state parameters, and determine the crankcase ventilation system operating state based on the operating environment parameters and the operating state parameters;

[0047] an icing rate determination submodule, configured to determine a corresponding icing rate according to an operating state of the crankcase ventilation system;

[0048] The icing amount calculation submodule is used to perform cumulative summation based on the icing rate and the operating time of the operating state to obtain the icing amount of the crankcase ventilation system in the current operating cycle.

[0049] Optionally, the icing rate determination submodule includes:

[0050] a search unit, configured to use the operating state of the crankcase ventilation system as an index, traverse a pre-calibrated icing rate lookup table, and determine an initial icing rate corresponding to the operating state of the crankcase ventilation system in combination with an interpolation algorithm;

[0051] The correction unit is used to correct the initial freezing rate according to a predetermined correction function to obtain a target freezing rate.

[0052] According to a third aspect of an embodiment of the present invention, an electronic device is provided, including:

[0053] at least one processor; and a memory communicatively connected to the at least one processor; wherein,

[0054] The memory stores instructions that can be executed by at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can perform the method steps proposed in the first aspect of the embodiment of the present invention.

[0055] A fourth aspect of an embodiment of the present invention provides a vehicle, the vehicle including a processor, and the processor is configured to implement the method steps provided in the first aspect of the embodiment of the present invention when executing.

[0056] Embodiments of the present invention include the following advantages: First, the amount of ice in the crankcase ventilation system during the current operating cycle is calculated, and based on a comparison of the amount of ice in the crankcase ventilation system during the current operating cycle with the amount of ice in the crankcase ventilation system during the previous operating cycle, a trend of change in the amount of ice in the crankcase ventilation system is determined. Then, based on the trend of change in the amount of ice, a diagnosis result of the ice level of the crankcase ventilation system is generated. Finally, based on the diagnosis result of the ice level, an ice treatment strategy corresponding to the level is executed. In the present invention, by real-time monitoring of the crankcase ventilation system, determining the corresponding ice severity, and implementing different treatment strategies based on the ice severity, the probability of engine failure and subsequent accidents caused by ice in the crankcase ventilation system is greatly reduced, thereby ensuring passenger travel safety to the greatest extent possible. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0058] Figure 1 is a flowchart of the steps of a crankcase ventilation system icing diagnosis method according to an embodiment of the present invention;

[0059] Figure 2 1 is a schematic diagram of a module of a crankcase ventilation system icing diagnosis device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0060] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0061] In the relevant technology, the normal operation of the engine is based on the normal operation of the crankcase ventilation system. However, in existing vehicles, unless a relevant icing sensor is installed, the degree of icing in the crankcase ventilation system cannot be obtained. Therefore, only when the engine fails can it be known that the crankcase ventilation system has been frozen. After knowing that the crankcase ventilation system has been frozen, unless a heating device is installed, it is impossible to start processing the crankcase ventilation system icing failure, and the only option is to wait for the crankcase ventilation system to slowly melt.

[0062] Therefore, how to monitor the severity of icing in the crankcase ventilation system in real time without setting up relevant icing sensors and heating devices, and implement different processing strategies according to the severity of icing in the crankcase ventilation system to avoid pipe blockage and functional failure, is the technical barrier to be solved by this application.

[0063] Based on this, the inventor proposed the inventive concept of this application: determining the severity of icing according to the amount of icing, and implementing different icing treatment strategies at different icing severities, thereby ensuring that the crankcase ventilation system is always in a safe operating state.

[0064] An embodiment of the present invention provides a crankcase ventilation system icing diagnosis method, which is applied to vehicles with a DHT architecture. The DHT architecture can achieve optimal operation in multiple modes. In this architecture, an engine, a generator, and a drive motor are included. The engine is mechanically connected to the clutch respectively, and the engine is mechanically connected to the generator through a gear set. The generator converts the engine's mechanical energy into electrical energy and stores it in the vehicle battery. The vehicle battery provides electrical energy to the drive motor, and the drive motor transmits power to the wheels through a two-stage gear set.

[0065] See also Figure 1 , Figure 1 A flowchart showing the steps of a crankcase ventilation system icing diagnosis method according to an embodiment of the present application is shown, which is applied to a vehicle ECU control system. The method includes:

[0066] S101: Calculate the amount of ice in the crankcase ventilation system during the current operating cycle.

[0067] In this embodiment, relevant parameters are obtained based on sensors preset in the vehicle, and the real-time ice amount of the crankcase ventilation system is calculated based on the parameters obtained by the sensors. The real-time ice amount of the crankcase ventilation system can be understood as the ice amount of the crankcase ventilation system during the current data collection period. The specific steps may be:

[0068] S101-1: Obtain operating environment parameters of the entire vehicle and operating condition parameters of the engine, and determine the operating state of the crankcase ventilation system based on the operating environment parameters and the operating condition parameters.

[0069] In this embodiment, the operating environment parameters of the whole vehicle include the operating temperature parameters of the whole vehicle and the operating humidity parameters of the whole vehicle, which are obtained through the vehicle's preset ambient temperature sensor and ambient humidity sensor. The operating condition parameters include the engine's output torque, the engine's speed, and the engine's intake manifold pressure, which are obtained through the engine's output torque sensor, the engine's speed sensor, and the engine's intake manifold pressure sensor. Then, based on the specific ranges of the operating temperature parameters, the vehicle's operating humidity parameters, the engine's output torque, the engine's speed, and the engine's intake manifold pressure values, the corresponding operating condition is determined.

[0070] As an example, if the operating temperature parameters, vehicle operating humidity parameters, engine output torque, engine speed, and engine intake manifold pressure values ​​collected during the current collection period are all within the numerical range corresponding to operating condition A, then it is determined that the operating condition corresponding to the crankcase ventilation system in the current collection period is state A.

[0071] S101-2: Determine a corresponding freezing rate according to the operating state of the crankcase ventilation system.

[0072] In this embodiment, to determine the operating state of the crankcase ventilation system, it is necessary to determine the freezing rate of the crankcase ventilation system under the operating state, that is, the freezing volume I of the crankcase ventilation system per unit time. The specific steps are as follows:

[0073] S101-2-1: Using the operating state of the crankcase ventilation system as an index, traverse a pre-calibrated icing rate lookup table, and determine the initial icing rate corresponding to the operating state of the crankcase ventilation system using an interpolation algorithm.

[0074] In this embodiment, multiple calibrations are performed through preliminary testing to obtain corresponding freezing rates for different operating conditions. These freezing rates are then combined to generate a freezing rate lookup table. The freezing rate lookup table is then traversed, using the operating condition as an index, to determine whether a matching operating condition exists. If so, the corresponding freezing rate is directly determined as the initial freezing rate for the crankcase ventilation system for the current acquisition period. If not, the adjacent operating conditions of the crankcase ventilation system are identified in the freezing rate lookup table. Based on these adjacent operating conditions, an interpolation algorithm is used to calculate the initial freezing rate for the crankcase ventilation system for the current acquisition period.

[0075] S101-2-2: Correct the initial freezing rate according to a predetermined correction function to obtain a target freezing rate.

[0076] In this embodiment, since the use of an interpolation algorithm will result in a large error in the calculated initial freezing rate, the initial freezing rate can be corrected according to a pre-set correction function to obtain a target freezing rate with a smaller error, and the calculated target freezing rate is used as the estimated freezing rate of the crankcase ventilation system in the current acquisition period.

[0077] Another feasible approach is to construct a sample dataset based on a large number of operating environment parameters, engine operating condition parameters, and corresponding icing rates, and train an icing prediction model based on the sample dataset. After obtaining the icing prediction model, feature extraction is performed on the operating environment parameters and engine operating condition parameters for the current acquisition cycle. The feature extraction results are input into the icing prediction model to obtain an estimated icing rate.

[0078] S101-3: Accumulate and sum the ice formation rate and the operating time of the operating state to obtain the ice formation amount of the crankcase ventilation system in the current operating cycle.

[0079] In this embodiment, after obtaining the freezing rate, the operating time of the operating state is counted. Since the operating environment parameters and the operating condition parameters of the engine are constantly changing, the operating state of the crankcase ventilation system will also change accordingly. Therefore, based on the freezing rate and operating time corresponding to each operating state, the real-time freezing amount of the crankcase ventilation system can be calculated according to Formula 1, that is, the real-time freezing amount of the crankcase ventilation system is the sum of the freezing volume under all operating conditions of the crankcase ventilation system.

[0080] Real-time freezing amount = I1*t1+I2*t2+…+In*tn, where I1 is the freezing rate of the first operating state, t1 is the operating time of the first operating state, In is the freezing rate of the nth operating state, and tn is the operating time of the nth operating state.

[0081] S102: Determine a change trend of the amount of ice in the crankcase ventilation system based on a comparison result of the amount of ice in the crankcase ventilation system in the current operating cycle and the amount of ice in the crankcase ventilation system in the previous cycle.

[0082] In this embodiment, after the crankcase ventilation system ice amount of the current operating cycle is generated, it will be retained in the storage area of ​​the controller, and the retention time is usually two operating cycles, namely the current operating cycle and the next operating cycle. Therefore, the crankcase ventilation system ice amount change trend can be judged based on the comparison result of the crankcase ventilation system ice amount of the current operating cycle and the crankcase ventilation system ice amount of the previous cycle. If the crankcase ventilation system ice amount of the current operating cycle is greater than the crankcase ventilation system ice amount of the previous cycle, it means that the crankcase ventilation system ice amount change trend is a trend of increasing ice accumulation. If the crankcase ventilation system ice amount of the current operating cycle is less than the crankcase ventilation system ice amount of the previous cycle, it means that the crankcase ventilation system ice amount change trend is a trend of decreasing ice melting. In order to improve the accuracy of the judgment, the judgment can only be determined to be accurate when the ice amount change trends in two consecutive cycles are the same.

[0083] S103: Generate a diagnosis result of the icing level of the crankcase ventilation system according to the icing amount change trend.

[0084] In this embodiment, when determining the trend of the amount of ice in the crankcase ventilation system, the current severity of ice formation is determined based on the specific amount of ice in the crankcase ventilation system. The specific steps may be:

[0085] S103 - 1 : When the ice amount variation trend is an ice accumulation trend, a corresponding ice accumulation level diagnosis result is generated according to a threshold range of the crankcase ventilation system ice amount in the current operating cycle.

[0086] In this embodiment, when the icing change trend is an icing accumulation trend, the threshold interval is divided by three pre-set thresholds, namely threshold 1, threshold 2, and threshold 3. Threshold 1, threshold 2, and threshold 3 gradually increase. If the amount of ice in the crankcase ventilation system in the current operation cycle is less than threshold 1, the crankcase ventilation system is in a safe operation state. If the amount of ice in the crankcase ventilation system is greater than threshold 1 and less than threshold 2, the corresponding icing accumulation level is the first icing accumulation level. If the amount of ice in the crankcase ventilation system is greater than threshold 2 and less than threshold 3, the corresponding icing accumulation level is the second icing accumulation level. If the amount of ice in the crankcase ventilation system is greater than threshold 3, the corresponding icing accumulation level is the third icing accumulation level.

[0087] S103-2: When the ice amount variation trend is an ice melting trend, a corresponding ice melting level diagnosis result is generated according to the threshold range of the crankcase ventilation system ice amount in the current operation cycle.

[0088] In this embodiment, when the icing change trend is an icing accumulation trend, the threshold interval is divided by three pre-set thresholds, namely threshold 4, threshold 5, and threshold 6, and threshold 4, threshold 5, and threshold 6 gradually increase. If the amount of ice in the crankcase ventilation system in the current operating cycle is less than threshold 6 and greater than threshold 5, the corresponding ice accumulation level is the first ice melting level. If the amount of ice in the crankcase ventilation system is greater than threshold 4 and less than threshold 5, the corresponding ice accumulation level is the second ice melting level. If the amount of ice in the crankcase ventilation system is less than threshold 4, the corresponding ice accumulation level is the third ice melting level.

[0089] S104: Executing an icing treatment strategy corresponding to the icing level according to the diagnosis result of the icing level.

[0090] In an embodiment, after determining the diagnosis result of the crankcase ventilation system icing level, a corresponding icing treatment strategy is executed according to the specific icing level. The specific steps may be:

[0091] S104-1: When the diagnosis result of the icing level is the first icing accumulation level, executing the engine operating condition adjustment strategy to adjust the engine piston blowby amount.

[0092] In this embodiment, the system will first record the fault and then execute the working condition adjustment strategy to adjust the engine piston blowby volume. The specific steps include:

[0093] S104-1-1: Obtain the required power of the vehicle and the maximum output power of the drive motor, and compare the required power of the vehicle and the maximum output power of the drive motor.

[0094] In this embodiment, the required power of the vehicle is determined by the user by driving the corresponding accelerator pedal and gear device, which represents the user's current power demand. The maximum output power of the drive motor refers to the maximum driving power that the drive motor can provide to the vehicle. If the maximum driving power that the drive motor can provide to the vehicle can meet the user's current power demand, the effect of reducing the real-time ice amount by adjusting the engine piston blowby can be achieved by reducing the relevant operating parameters of the engine.

[0095] S104-1-2: When the required power of the vehicle is less than or equal to the maximum output power of the drive motor, execute the first level drive control strategy.

[0096] In an embodiment, if the vehicle's required power is less than or equal to the maximum output power of the drive motor, the engine load can be reduced by using the drive motor instead of the engine for driving. That is, the first-level drive control strategy is a switching strategy that uses the drive motor as the main power source. The specific steps may be:

[0097] S104-1-2-1: Obtain the current SOC value of the vehicle's power battery.

[0098] S104-1-2-2: When the current SOC value is greater than or equal to the third threshold, use the drive motor as the sole power source to execute the first drive mode;

[0099] S104-1-2-3: When the current SOC value is less than the third threshold, the engine is used as the auxiliary power source, the drive motor is used as the main power source, and the engine speed is reduced at the same time to execute the second driving mode.

[0100] In the embodiments of S104-1-2-1 to S104-1-2-3, the third threshold value refers to the limit at which the vehicle's power battery can normally drive the drive motor. If the SOC value of the power battery is greater than or equal to the third threshold value, it indicates that the current charge level of the vehicle's power battery is healthy and can normally drive the drive motor. Therefore, in this case, the drive motor is used as the sole power source, that is, the vehicle is driven in a pure electric drive mode. In this mode, the engine is shut down and only the vehicle's power battery provides electrical energy to the drive motor, which transmits power to the wheels through a two-stage gear set. If the SOC value of the power battery is less than the third threshold value, it indicates that the current charge level of the vehicle's power battery is unhealthy and needs to be charged. Therefore, in this case, the drive motor is used as the main power source to drive the vehicle, and the vehicle's engine can be used as an auxiliary power source, that is, a portion of the engine's mechanical energy is used to generate electricity, while the engine speed is reduced to charge the vehicle's power battery, so that the drive motor can operate at maximum power. That is, it is driven in series driving mode. In this mode, the generator runs but is not engaged with the clutch. The generator converts the mechanical energy of the engine into electrical energy, and then the vehicle power battery provides electrical energy to the drive motor, which transmits power to the wheels through a two-stage gear set.

[0101] S104-1-3: When the vehicle's required power is greater than the maximum output power of the drive motor, execute the second level drive control strategy.

[0102] In this embodiment, when the vehicle's required power is greater than the maximum output power of the drive motor, it means that the drive motor alone cannot meet the user's power requirement. Therefore, it is necessary to use both the drive motor and the engine as the main power sources, i.e., the second-level drive control strategy. The specific steps include:

[0103] The third driving mode is implemented by using both the drive motor and the engine as the main power sources and reducing the torque of the engine at the same time.

[0104] In this embodiment, the engine participates in power output. At this time, the engine output torque is adjusted to reduce the amount of engine piston blowby. The power of the drive motor and the engine can be dynamically adjusted according to a given output ratio, that is, both the drive motor and the engine are used as the main power source to execute the parallel drive mode.

[0105] S104-2: When the diagnosis result of the icing level is the second icing accumulation level, an alarm reminder is issued and a takeover reminder is sent to the user.

[0106] In this embodiment, when the icing level is the second icing accumulation level, it means that the icing trend of the crankcase ventilation system cannot be suppressed through the vehicle's autonomous adjustment, so the user needs to actively intervene to make corresponding adjustments. Therefore, the user can be reminded of the fault by lighting a fault light or sending a voice alarm, and a takeover reminder can be sent to the user for timely and proactive processing.

[0107] S104-3: When the diagnosis result of the icing level is the third icing accumulation level, execute the engine power limitation strategy.

[0108] In this embodiment, when the icing level is the third ice accumulation level, it indicates that the crankcase ventilation system is already in a very dangerous state. Therefore, in order to protect engine safety, it is necessary to limit the engine power performance, that is, to execute the engine power limitation strategy to protect user safety.

[0109] S104-4: When the icing level diagnosis result is the first ice melting level, exit the engine power limitation strategy;

[0110] S104-5: When the diagnosis result of the icing level is the second ice melting level, the alarm reminder is stopped;

[0111] S104-6: When the diagnosis result of the icing level is the third ice melting level, executing the normal engine operation strategy.

[0112] In the implementation of S104-4 to S104-6, when the icing condition of the crankcase ventilation system is ice melting, the corresponding protection strategy is released according to the specific ice melting level until the vehicle returns to normal operation.

[0113] The embodiment of the present invention also provides a crankcase ventilation system icing diagnosis device, referring to Figure 2 , shows a functional module diagram of a crankcase ventilation system icing diagnosis device according to the present invention, which may include the following modules:

[0114] A calculation module 201 is used to calculate the amount of ice in the crankcase ventilation system during the current operation cycle;

[0115] a determination module 202 for determining a trend of an amount of ice in the crankcase ventilation system based on a comparison result of an amount of ice in the crankcase ventilation system in a current operating cycle with an amount of ice in the crankcase ventilation system in a previous operating cycle;

[0116] The diagnostic module 203 is configured to generate a diagnostic result of the icing level of the crankcase ventilation system according to the icing amount change trend;

[0117] The execution module 204 is configured to execute an icing treatment strategy corresponding to the icing level according to the diagnosis result of the icing level.

[0118] In a feasible implementation, the diagnosis module 203 includes:

[0119] A first diagnostic submodule is configured to generate a corresponding ice ablation level diagnosis result based on a threshold range of ice amount in the crankcase ventilation system during a current operating cycle when the ice amount change trend is an ice ablation trend;

[0120] The second diagnostic submodule is configured to generate a diagnostic result of a corresponding ice accumulation level according to a threshold range of ice amount in the crankcase ventilation system during a current operating cycle when the ice amount variation trend is an ice accumulation trend.

[0121] In a feasible implementation, the execution module 204 includes:

[0122] a first execution submodule, configured to execute an engine operating condition adjustment strategy to adjust an amount of engine piston blowby when the icing level diagnosis result is a first icing accumulation level;

[0123] A second execution submodule is configured to, when the diagnosis result of the icing level is the second icing accumulation level, execute an alarm reminder and send a takeover reminder to the user;

[0124] The third execution submodule is configured to execute the engine power limitation strategy when the diagnosis result of the icing level is a third icing accumulation level.

[0125] In a feasible implementation, the diagnosis module 204 further includes:

[0126] a fourth execution submodule, configured to exit the engine power limitation strategy when the diagnosis result of the icing level is the first ice melting level;

[0127] a fifth execution submodule, configured to stop the alarm reminder when the diagnosis result of the icing level is the second ice melting level;

[0128] The sixth execution submodule is configured to execute the normal engine operation strategy when the diagnosis result of the icing level is the third ice melting level.

[0129] In a feasible implementation, the calculation module 201 includes:

[0130] The crankcase ventilation system operating state determination submodule is used to obtain the vehicle's operating environment parameters and the engine's operating condition parameters, and determine the crankcase ventilation system's operating state based on the operating environment parameters and the operating condition parameters;

[0131] An icing rate determination submodule, configured to determine a corresponding icing rate according to an operating state of the crankcase ventilation system;

[0132] The icing amount calculation submodule is used to accumulate and sum the icing rate and the operating time of the working state to obtain the icing amount of the crankcase ventilation system in the current operating cycle.

[0133] In a feasible implementation, the icing rate determination submodule includes:

[0134] a search unit, configured to use the operating state of the crankcase ventilation system as an index, traverse a pre-calibrated icing rate lookup table, and determine an initial icing rate corresponding to the operating state of the crankcase ventilation system in combination with an interpolation algorithm;

[0135] The correction unit is used to correct the initial freezing rate according to a predetermined correction function to obtain a target freezing rate.

[0136] In another embodiment provided by the present invention, a vehicle is further provided. The vehicle includes a processor, and the processor is used to implement the method proposed in the first aspect of the embodiment of the present invention when executing.

[0137] Based on the same inventive concept, another embodiment of the present invention provides an electronic device, including a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other via the communication bus.

[0138] Memory for storing computer programs;

[0139] The processor is configured to implement the crankcase ventilation system icing diagnosis method of the present invention when executing the program stored in the memory.

[0140] The communication bus mentioned in the above terminal can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. The communication bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, only one thick line is used in the figure, but it does not mean that there is only one bus or one type of bus. The communication interface is used for communication between the above terminal and other devices. The memory can include a random access memory (RAM) or a non-volatile memory, such as at least one disk storage. Optionally, the memory can also be at least one storage system located away from the aforementioned processor.

[0141] The above-mentioned processor can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, and discrete hardware components.

[0142] In addition, to achieve the above-mentioned purpose, an embodiment of the present application further proposes a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the crankcase ventilation system icing diagnosis method of the embodiment of the present application.

[0143] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Thus, embodiments of the present invention may take the form of entirely hardware embodiments, entirely software embodiments, or embodiments combining software and hardware aspects. Furthermore, embodiments of the present invention may take the form of a computer program product implemented on one or more computer-usable devices (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0144] The embodiments of the present invention are described with reference to the flowcharts and / or block diagrams of the methods, terminal devices (systems), and computer program products according to the embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of the processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing terminal device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing terminal device generate instructions for implementing the process in the flowchart and / or block diagram. Figure 1 a process or multiple processes and / or boxes Figure 1 A system that specifies the functions of a box or boxes.

[0145] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing terminal device to operate in a specific manner, so that the instructions stored in the computer readable memory produce a product including an instruction system, which is implemented in the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0146] These computer program instructions can also be loaded onto a computer or other programmable data processing terminal device so that a series of operating steps are executed on the computer or other programmable terminal device to produce a computer-implemented process, thereby providing instructions for executing on the computer or other programmable terminal device to implement the process. Figure 1 a process or multiple processes and / or boxes Figure 1 The steps for the function specified in one or more boxes.

[0147] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. "And / or" means that either one of the two can be selected, or both can be selected. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device that includes a series of elements includes not only those elements, but also other elements that are not explicitly listed, or also includes elements that are inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the presence of other identical elements in the process, method, article or terminal device that includes the elements.

[0148] The above is a detailed introduction to the crankcase ventilation system icing diagnosis method, device, electronic equipment and vehicle provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. A method for diagnosing icing in a crankcase ventilation system, characterized in that: The method comprises: Calculate the amount of crankcase ventilation system ice for the current operating cycle; determining a trend of an amount of ice in the crankcase ventilation system according to a comparison result of an amount of ice in the crankcase ventilation system in the current operating cycle and an amount of ice in the crankcase ventilation system in a previous cycle; generating a diagnosis result of an icing level of the crankcase ventilation system according to the icing amount variation trend; executing an icing treatment strategy corresponding to the icing level according to the diagnosis result of the icing level; The icing amount variation trend includes an icing accumulation trend. The step of generating a diagnosis result of the icing level of the crankcase ventilation system according to the icing amount variation trend includes: If the ice amount variation trend is an ice accumulation trend, generating a corresponding ice accumulation level diagnosis result according to a threshold range of the crankcase ventilation system ice amount in the current operating cycle; The ice accumulation levels include a first ice accumulation level, a second ice accumulation level, and a third ice accumulation level. The step of executing an ice handling strategy corresponding to the ice accumulation level according to the diagnosis result of the ice accumulation level includes: When the diagnosis result of the icing level is a first icing accumulation level, executing an engine operating condition adjustment strategy to adjust the engine piston blowby amount; When the icing level diagnosis result is the first icing accumulation level, executing an engine operating condition adjustment strategy to adjust the engine piston blowby amount includes: Obtaining the vehicle's required power and the maximum output power of the drive motor, and comparing the vehicle's required power with the maximum output power of the drive motor; When the vehicle's required power is less than or equal to the maximum output power of the drive motor, a current SOC value of the vehicle's power battery is obtained; when the current SOC value is greater than or equal to a third threshold, the drive motor is used as the sole power source to implement a first driving mode; when the current SOC value is less than the third threshold, the engine is used as an auxiliary power source, the drive motor is used as the main power source, and the engine speed is reduced to implement a second driving mode; When the vehicle's required power is greater than the maximum output power of the drive motor, both the drive motor and the engine are used as main power sources, and the engine torque is reduced at the same time to execute the third drive mode.

2. The crankcase ventilation system icing diagnosis method according to claim 1, characterized in that: The ice amount variation trend also includes ice melting trend; The step of generating a diagnosis result of the icing level of the crankcase ventilation system according to the icing amount variation trend includes: When the ice amount variation trend is an ice melting trend, a corresponding ice melting level diagnosis result is generated according to the threshold range of the crankcase ventilation system ice amount in the current operation cycle.

3. The crankcase ventilation system icing diagnosis method according to claim 1, characterized in that: The step of executing an icing treatment strategy corresponding to the icing level according to the diagnosis result of the icing level includes: When the diagnosis result of the ice level is the second ice accumulation level, an alarm reminder is executed and a takeover reminder is sent to the user; When the diagnosis result of the icing level is a third icing accumulation level, an engine power limiting strategy is executed.

4. The crankcase ventilation system icing diagnosis method according to claim 2, characterized in that: The ice ablation levels include a first ice ablation level, a second ice ablation level, and a third ice ablation level. The steps of executing an ice treatment strategy corresponding to the ice ablation level according to the ice ablation level diagnosis result include: When the diagnosis result of the icing level is the first ice melting level, exiting the engine power limitation strategy; When the diagnosis result of the ice level is the second ice melting level, stopping the alarm reminder; When the diagnosis result of the icing level is the third ice melting level, a normal engine operation strategy is executed.

5. The crankcase ventilation system icing diagnosis method according to claim 1, characterized in that: The steps to calculate the amount of crankcase ventilation system ice for the current operating cycle include: Obtaining operating environment parameters of the vehicle and operating condition parameters of the engine, and determining the operating state of the crankcase ventilation system according to the operating environment parameters and the operating condition parameters; determining a corresponding icing rate according to an operating state of the crankcase ventilation system; An accumulation and summation are performed according to the freezing rate and the operating time of the operating state to obtain the freezing amount of the crankcase ventilation system in the current operating cycle.

6. The crankcase ventilation system icing diagnosis method according to claim 5, characterized in that: The step of determining a corresponding icing rate according to an operating state of the crankcase ventilation system comprises: Using the operating state of the crankcase ventilation system as an index, traversing a pre-calibrated icing rate lookup table, and determining an initial icing rate corresponding to the operating state of the crankcase ventilation system in combination with an interpolation algorithm; The initial freezing rate is corrected according to a predetermined correction function to obtain a target freezing rate.

7. A crankcase ventilation system icing diagnosis device, characterized in that: The device comprises: a calculation module, for calculating the amount of ice in the crankcase ventilation system during a current operating cycle; a determination module, configured to determine a trend of an amount of ice in the crankcase ventilation system based on a comparison result of an amount of ice in the crankcase ventilation system in the current operating cycle with an amount of ice in the crankcase ventilation system in a previous cycle; a diagnostic module, configured to generate a diagnostic result of an icing level of the crankcase ventilation system according to the icing amount variation trend; an execution module, configured to execute an icing treatment strategy corresponding to the icing level according to the diagnosis result of the icing level; The diagnostic module includes: a first diagnostic submodule, configured to generate a corresponding ice ablation level diagnosis result according to a threshold range of ice amount in the crankcase ventilation system during the current operating cycle when the ice amount variation trend is an ice ablation trend; The execution module includes: The first execution submodule is used to execute the engine operating condition adjustment strategy to adjust the engine piston blowby amount when the diagnostic result of the icing level is the first ice accumulation level; to obtain the vehicle's required power and the maximum output power of the drive motor, and to compare the vehicle's required power and the maximum output power of the drive motor; and to obtain the current SOC value of the vehicle's power battery when the vehicle's required power is less than or equal to the maximum output power of the drive motor; when the current SOC value is greater than or equal to a third threshold, use the drive motor as the sole power source to execute the first drive mode; when the current SOC value is less than the third threshold, use the engine as the auxiliary power source and the drive motor as the main power source, and at the same time reduce the engine speed to execute the second drive mode; and when the vehicle's required power is greater than the maximum output power of the drive motor, use both the drive motor and the engine as the main power sources, and at the same time reduce the engine torque to execute the third drive mode.

8. The crankcase ventilation system icing diagnosis device according to claim 7, characterized in that: The ice amount variation trend includes an ice melting trend, and the diagnostic module includes: The second diagnostic submodule is configured to generate a diagnostic result of a corresponding ice accumulation level according to a threshold range of ice amount in the crankcase ventilation system during the current operating cycle when the ice amount variation trend is an ice accumulation trend.

9. An electronic device, characterized in that: It includes a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus; Memory for storing computer programs; The processor is configured to implement the crankcase ventilation system icing diagnosis method according to any one of claims 1 to 6 when executing a program stored in the memory.

10. A vehicle, characterized in that: The method comprises a processor and a memory, wherein the memory stores machine executable instructions that can be executed by the processor, and the processor is used to execute the machine executable instructions to implement the crankcase ventilation system icing diagnosis method according to any one of claims 1 to 6.

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