Engine torque control method, engine torque control device, and vehicle

Abstract

The present application is applicable to the technical field of automobiles, and provides an engine torque control method, an engine torque control device, and a vehicle. The engine torque control method comprises: acquiring a sensor state of a temperature sensor and an intake air temperature collected by the temperature sensor, the intake air temperature being an intake air temperature after the pressure is boosted by a turbocharger; on the basis of the sensor state and the intake air temperature, determining whether a vehicle satisfies a torque limitation condition; if the vehicle satisfies the torque limitation condition, acquiring driving scenario information of the vehicle, and determining limited torque on the basis of the driving scenario information; and controlling output torque of an engine to be less than or equal to the limited torque.

Description

Torque control method of engine, torque control device of engine and vehicle

[0001] The present application claims priority from the Chinese patent application No. CN202411348947.1 filed on September 26, 2024, and entitled "Torque control method of engine, storage medium and vehicle", the whole content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present application belongs to the field of automobile technology, in particular relates to a torque control method of engine, a torque control device of engine and a vehicle. BACKGROUND

[0003] With the increase of off-road population, off-road vehicle owners have higher and higher requirements for the off-road performance of vehicles. Most off-road vehicles will configure a turbocharger to improve power performance. However, in extreme working conditions, the turbocharger explodes power, which also brings great test to the temperature resistance of parts. In the related technology, the vehicle using the turbocharger is easy to reach the temperature resistance boundary of the parts, and the problems such as heat fatigue aging of the pipeline are caused, which has great hidden danger to the safety and disaster prevention, and is easy to cause fire, seriously affecting the life safety of the user in the vehicle. SUMMARY

[0004] The embodiments of the present application provide a torque control method of engine, a torque control device of engine and a vehicle, which can reduce the problem of part damage caused by too high intake temperature after supercharging.

[0005] The first aspect of the embodiments of the present application provides a torque control method of engine, comprising: acquiring a sensor state of a temperature sensor and an intake temperature collected by the temperature sensor, the intake temperature being an intake temperature after supercharging by a turbocharger; determining whether a vehicle meets a torque limiting condition according to the sensor state and the intake temperature; if the vehicle meets the torque limiting condition, acquiring driving scene information of the vehicle, and determining a limiting torque according to the driving scene information; and controlling an output torque of the engine to be less than or equal to the limiting torque.

[0006] The second aspect of the embodiments of the present application provides a torque control device of engine, comprising:

[0007] An acquisition unit is configured to acquire a sensor state of a temperature sensor and an intake temperature collected by the temperature sensor, the intake temperature being an intake temperature after supercharging by a turbocharger;

[0008] A determination unit is configured to determine whether a vehicle meets a torque limiting condition according to the sensor state and the intake temperature;

[0009] determining unit, configured to acquire driving scene information of the vehicle if the vehicle meets the torque limiting condition, and determine the limiting torque according to the driving scene information;

[0010] a control unit, configured to control the output torque of the engine to be less than or equal to the limiting torque.

[0011] The third aspect of the embodiment of the present application provides a computer readable storage medium, which stores a computer program. The computer program is executed by a processor to implement the steps of the torque control method of the engine.

[0012] The fourth aspect of the embodiment of the present application provides a vehicle, which comprises a memory, a processor, and a computer program stored in the memory and executable on the processor. The processor executes the computer program to implement the steps of the torque control method of the engine.

[0013] The fifth aspect of the embodiment of the present application provides a computer program product, which, when executed on a vehicle, causes the vehicle to perform the torque control method of the engine.

[0014] In summary, by acquiring the sensor state of the temperature sensor and the intake air temperature after turbocharging collected by the temperature sensor, according to the sensor state and the intake air temperature, it is determined whether the vehicle meets the torque limiting condition. If the vehicle meets the torque limiting condition, the driving scene information of the vehicle is acquired, and the limiting torque is determined according to the driving scene information. The output torque of the engine is controlled to be less than or equal to the limiting torque. When the intake air temperature after turbocharging is too high, the torque output is limited, and the problem of wear of parts caused by the too high intake air temperature after turbocharging is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the description of the embodiments of the present application will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0016] FIG. 1 is an implementation flow diagram of a torque control method of an engine according to an embodiment of the present application;

[0017] FIG. 2 is a specific implementation flow diagram of determining a limiting torque according to an embodiment of the present application;

[0018] FIG. 3 is a structural diagram of a torque control device of an engine according to an embodiment of the present application;

[0019] FIG. 4 is a structural diagram of a vehicle according to an embodiment of the present application. DETAILED DESCRIPTION

[0020] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are protected by this application.

[0021] With the increasing number of off-road enthusiasts, off-road vehicle owners are demanding higher and higher off-road performance from their vehicles. Most off-road vehicles utilize turbochargers to enhance their power. However, under extreme conditions, while turbochargers deliver explosive power, they also place immense strain on the temperature resistance of components. In vehicles using turbochargers, components easily reach their temperature limits, leading to issues such as thermal fatigue and aging of piping. This poses a significant safety hazard, increasing the risk of fire and seriously endangering the lives of occupants.

[0022] Taking the test results of a certain turbocharged vehicle in the Ulan Buh Desert in the direct ascent of Mount Everest as an example, the vehicle was continuously driven up to the top of Mount Everest 8 times. As shown in Table 1, the turbocharger, intercooler intake pipe and fuel desorption pipe all exceeded the temperature resistance standard, which will pose a safety hazard.

[0023] Table 1

[0024] In Table 1, when the component is a turbocharger, the corresponding temperature resistance standard is: 210℃ (degrees Celsius) for short-term and 200℃ for long-term, while the actual tested temperature is 227.3℃, exceeding the temperature by 317 seconds; when the component is an intercooler intake manifold, the corresponding temperature resistance standard is: 190℃ for short-term and 170℃ for long-term, while the actual tested temperature is 216.3℃, exceeding the temperature by 270 seconds; when the component is a fuel desorption manifold, the corresponding temperature resistance standard is: 180℃ for short-term and 150℃ for long-term, while the actual tested temperature is 193.3℃, ​​exceeding the temperature by 210 seconds.

[0025] In view of this, this application proposes a torque control method for an engine, which can reduce the problem of component wear caused by excessively high intake temperature after turbocharging.

[0026] It should be noted that the embodiments of this application are based on the above findings and analyses, and the above findings and analyses should be regarded as part of the embodiments of this application.

[0027] To illustrate the technical solution of this application, specific embodiments are described below.

[0028] Fig. 1 shows a flowchart of an engine torque control method according to an embodiment of the present application, which can be applied to a vehicle.

[0029] In the embodiments of the present application, the vehicle can be configured with a turbocharger and a temperature sensor. The turbocharger can increase the intake air of the engine by compressing the air, so that more air enters the combustion chamber, thereby improving the combustion efficiency and enabling the engine to release more energy and improve power output under the same displacement. The temperature sensor can be arranged on one side of the turbocharger for measuring the temperature of the intake air after being pressurized by the turbocharger.

[0030] Specifically, the torque control method of the engine can include the following steps S101, S102, S103 and S104.

[0031] Step S101, obtaining the sensor state of the temperature sensor and the intake air temperature collected by the temperature sensor.

[0032] In the embodiments of the present application, the sensor state refers to the operating state of the temperature sensor, which can include normal working state and fault state, and can be determined by self-checking the electrical parameters of the temperature sensor or by determining whether the intake air temperature exceeds the normal range. The intake air temperature is the temperature of the intake air entering the combustion chamber after being pressurized by the turbocharger.

[0033] Step S102, determining whether the vehicle meets the torque limiting condition according to the sensor state and the intake air temperature.

[0034] In the embodiments of the present application, the torque limiting condition can indicate that the vehicle components may reach the temperature resistance boundary and the engine torque needs to be limited. The sensor state can indicate the reliability of the intake air temperature, and the intake air temperature can indicate whether the current components will reach the temperature resistance boundary. Therefore, according to the sensor state and the intake air temperature, it can be determined whether the vehicle meets the torque limiting condition.

[0035] Step S103, if the vehicle meets the torque limiting condition, obtaining the driving scene information of the vehicle, and determining the limited torque according to the driving scene information.

[0036] If the vehicle meets the torque limiting condition, it means that the components will reach the temperature resistance boundary, at which time the driving scene information of the vehicle needs to be obtained, and the limited torque is determined according to the driving scene information, so that the limited torque is adapted to the current driving scene of the vehicle. The driving scene information represents the driving scene of the vehicle, and can include but is not limited to at least one of the vehicle speed, the ambient temperature of the environment, the driving mode, the engine speed and the current torque in the vehicle.

[0037] Correspondingly, if the vehicle does not satisfy the torque limiting condition, it indicates that the component has not reached the temperature resistance boundary, and the torque limiting process can be skipped.

[0038] In step S104, the output torque of the engine is controlled to be less than or equal to the limiting torque.

[0039] Specifically, if the output torque of the engine is greater than the limiting torque, the output torque of the engine needs to be limited, so that the output torque of the engine after the limitation is less than or equal to the limiting torque, that is, the output torque of the engine is controlled to be less than or equal to the limiting torque. On the contrary, if the output torque of the engine is less than or equal to the limiting torque, no process is needed.

[0040] In some embodiments of the present application, controlling the output torque of the engine to be less than or equal to the limiting torque can include: if the current output torque of the engine is greater than the limiting torque, controlling the output torque of the engine to be the limiting torque; and if the current output torque of the engine is less than or equal to the limiting torque, controlling the output torque of the engine to be the current output torque of the engine.

[0041] Specifically, when limiting the output torque of the engine, the current output torque of the engine can be obtained first, and the size relationship between the current output torque of the engine and the limiting torque is determined. The current output torque of the engine is limited by the size relationship between the current output torque of the engine and the limiting torque.

[0042] When the current output torque of the engine is greater than the limiting torque, it indicates that the current output torque of the engine is too large. If the current output torque of the engine is not limited, the intake temperature can be further increased due to the excessive output torque of the engine. Therefore, in order to avoid the further increase of the intake temperature due to the excessive output torque of the engine, the current output torque of the engine can be limited to the limiting torque, that is, the output torque of the engine is controlled to be the limiting torque.

[0043] When the current output torque of the engine is less than or equal to the limiting torque, it indicates that the current output torque of the engine is small, which generally does not cause the intake temperature to continue to rise. Therefore, in order to ensure the normal power output of the vehicle, the current output torque of the engine can not be limited, and the current output torque of the engine remains unchanged, that is, the output torque of the engine is controlled to be the current output torque of the engine.

[0044] In the embodiments of the present application, by acquiring the sensor state of the temperature sensor and the intake air temperature after turbocharging of the temperature sensor, it is determined whether the vehicle satisfies the torque limiting condition according to the sensor state and the intake air temperature. If the vehicle satisfies the torque limiting condition, the driving scene information of the vehicle is acquired, and the limiting torque is determined according to the driving scene information, and the output torque of the engine is controlled to be less than or equal to the limiting torque. In this way, when the intake air temperature after turbocharging is too high, the torque output is limited, and the problem of component wear caused by the too high intake air temperature after turbocharging is reduced.

[0045] In some embodiments of the present application, determining whether the vehicle satisfies the torque limiting condition according to the sensor state and the intake air temperature can include: if the sensor state is a normal working state, and the duration of the intake air temperature being greater than or equal to the first temperature threshold is greater than the first time threshold, it is determined that the vehicle satisfies the torque limiting condition.

[0046] Specifically, if the sensor state is a normal working state, it means that the intake air temperature is reliable. At this time, if the intake air temperature after turbocharging Tx≥ the first temperature threshold T1, the over-temperature counter B1 starts counting. When the counter value tx> the first time threshold t1, it is determined that the vehicle satisfies the torque limiting condition, the torque limiting protection is triggered, and the engine control module (ECM) of the vehicle can control the engine to operate according to the limiting torque. The first temperature threshold and the first time threshold can be set according to actual conditions, for example, the first temperature threshold can be set to 150℃, and the first time threshold can be set to 90s. The first temperature threshold is used to determine whether the intake air temperature is over-temperature.

[0047] Correspondingly, if the sensor state is a normal working state, and the intake air temperature is less than the second temperature threshold, the output torque limiting of the engine can be stopped. The second temperature threshold can be set according to actual conditions, for example, the second temperature threshold can be set to 60℃. The second temperature threshold is less than the first temperature threshold, and the second temperature threshold is used to determine whether the intake air temperature is not over-temperature.

[0048] Specifically, if the intake air temperature after turbocharging Tx< the second temperature threshold T2, the over-temperature counter B1 stops counting and resets, prompting the exit of the torque limiting protection, and the engine control module of the vehicle can be controlled according to the limiting torque control strategy, for example, the output torque is determined according to the power demand of the vehicle.

[0049] In some embodiments of the present application, determining whether the vehicle satisfies the torque limiting condition according to the sensor state and the intake air temperature can include: if the sensor state is a normal working state, and the intake air temperature is less than the first temperature threshold, or the duration of the intake air temperature being greater than or equal to the first temperature threshold is less than or equal to the first time threshold, it is determined that the vehicle does not satisfy the torque limiting condition.

[0050] Specifically, if the sensor state is the normal working state, it indicates that the intake temperature is reliable. At this time, if the supercharged intake temperature Tx < the first temperature threshold T1, it indicates that the intake temperature is low, and the engine output torque does not need to be limited, and it can be determined that the vehicle does not meet the torque limiting condition.

[0051] Or, if the sensor state is the normal working state, it indicates that the intake temperature is reliable. At this time, if the supercharged intake temperature Tx ≥ the first temperature threshold T1, the over-temperature counter B1 starts counting. When the counter value tx ≤ the first time threshold t1, it indicates that the duration of the over-temperature of the intake temperature is short, and it is not over-temperature for a long time, and the engine output torque does not need to be limited, and it can be determined that the vehicle does not meet the torque limiting condition.

[0052] In some embodiments of the present application, as shown in FIG. 2, obtaining the driving scene information of the vehicle, and determining the limited torque according to the driving scene information can include steps S201 and S202.

[0053] In step S201, if the sensor state is the normal working state, the first information of the vehicle is taken as the driving scene information.

[0054] The first information can include at least one of the ambient temperature of the environment, the vehicle speed, the driving mode, the engine speed and the current torque. The ambient temperature can be collected by the ambient temperature sensor configured by the vehicle, or obtained by networking to obtain the local weather information. The vehicle speed can be measured by the vehicle speed sensor, or by external software and hardware such as the driving recorder and the navigation device. The driving mode can be input by the user, or determined by the vehicle according to the current driving demand, which can include but is not limited to any one of the sand mode, the mud mode, the snow mode, the sports mode, the economy mode and the standard mode. The engine speed can be measured based on the electromagnetic sensor, the Hall switch element or other components. The current torque can be measured based on the sensor on the engine crankshaft, or calculated based on other engine parameters (such as cylinder diameter, piston stroke, power, speed, etc.). It can be understood that the more information types included in the first information, the more accurately the current driving scene of the vehicle can be represented, and thus a more reasonable limited torque can be given.

[0055] In some embodiments of the present application, the current driving demand of the user in the vehicle is determined, and the driving mode is determined based on the current driving demand, wherein the driving mode includes at least one of the sand mode, the mud mode, the snow mode, the sports mode, the economy mode and the standard mode.

[0056] Specifically, in determining the current driving demand of the user, at least one of the ambient temperature of the environment where the vehicle is located, the vehicle speed, the engine speed, and the current torque can be determined as the current driving demand of the user, and the driving mode of the vehicle is determined according to the determined current driving demand of the user. The driving mode can include at least one of a sand mode, a mud mode, a snow mode, a sports mode, an economy mode, and a standard mode.

[0057] In step S202, the limiting torque is determined according to the first information.

[0058] By comprehensively considering the various first information, the limiting torque can be determined so as to meet the driving scene demand of the vehicle.

[0059] In some embodiments of the present application, the first information can include the ambient temperature of the environment, the vehicle speed, the driving mode, the engine speed, and the current torque. The vehicle can determine an initial torque according to the engine speed and the intake temperature, determine a correction coefficient according to the ambient temperature, the driving mode, the current torque of the engine, and the vehicle speed, and correct the initial torque according to the correction coefficient to obtain the limiting torque.

[0060] The initial torque is negatively correlated with the engine speed and the intake temperature.

[0061] Specifically, the engine speed and the intake temperature after supercharging can represent the heat condition of the current internal components of the vehicle. The higher the engine speed and the higher the intake temperature after supercharging, the higher the theoretical temperature of the components, and therefore, the greater the torque limitation is needed to achieve the purpose of cooling. The initial torque can represent the basic value of the limiting torque, and the higher the initial torque, the higher the limiting torque obtained by correction. Therefore, the higher the engine speed and the higher the intake temperature after supercharging, the lower the initial torque, and the greater the torque limitation effect can be achieved.

[0062] In some embodiments of the present application, the initial torque can be determined by querying a first control table according to the engine speed and the intake temperature. The first control table records the corresponding relationship between the engine speed, the intake temperature, and the initial torque. For example, Table 2 below is an example of the first control table, where TBD indicates that the calibration is to be performed, and the value can be different for different vehicle models. For a single vehicle model, the initial torque in the first control table can be negatively correlated with the engine speed and the intake temperature after supercharging, so that the higher the engine speed and the higher the intake temperature after supercharging, the smaller the initial torque and the limiting torque, and thus the engine is controlled to work at a lower torque to achieve cooling.

[0063] Table 2

[0064] In Table 2, the corresponding TBD initial torque when the intake temperature is 150℃ and the rotating speed is 700; the corresponding TBD initial torque when the intake temperature is 160℃ and the rotating speed is 700; and so on and so forth, the meanings of other values in Table 2 can be obtained.

[0065] The correction coefficient is used to limit the initial torque (i.e., the initial torque T1) so that the final limited torque is more in line with the actual driving needs of the vehicle. The manner in which the correction coefficient acts can be selected according to actual conditions, for example, the correction coefficient can be multiplied, added or otherwise modified with the initial torque.

[0066] For example, the sum of the correction coefficient and the initial torque is determined as the limited torque. Alternatively, the product of the correction coefficient and the initial torque is determined as the limited torque.

[0067] Specifically, in some embodiments of the present application, the correction coefficient can include a first correction coefficient and a second correction coefficient. According to the ambient temperature, the driving mode, the current torque and the vehicle speed, the correction coefficient is determined, which can include: determining the first correction coefficient according to the driving mode and the current torque. The second correction coefficient is determined according to the ambient temperature and the vehicle speed.

[0068] The driving mode and the current torque can represent the current power or resistance of the vehicle. In the sand mode, mud mode, snow mode, sports mode and other driving modes, the vehicle is in a more intense operating condition, at this time, the current temperature of the parts is theoretically higher, therefore, the torque needs to be limited to a greater extent to achieve the purpose of cooling. In the economy mode and the standard mode, the vehicle is in a more stable operating condition, at this time, the current temperature of the parts is theoretically smaller, therefore, the torque can be limited to a smaller extent or even not limited. Similarly, the higher the current torque, the more intense the driving condition of the vehicle, and the greater the extent of torque limitation required.

[0069] In some embodiments of the present application, the first correction coefficient can be determined by querying a second control table according to the driving mode and the current torque. The second control table records the correspondence between the driving mode, the current torque and the first correction coefficient. For example, Table 3 below is an example of the second control table, where TBD represents to be calibrated, and the value can be different according to the vehicle type.

[0070] Table 3

[0071] In Table 3, the corresponding TBD first correction coefficient when the driving mode is sand mode and the current torque is 150 N·m; the corresponding TBD first correction coefficient when the driving mode is mud mode and the current torque is 150 N·m; and so on and so forth, the meanings of other values in Table 3 can be obtained.

[0072] In some embodiments of the present application, the limiting torque can be positively correlated with the correction coefficient, for example, the correction coefficient is added or multiplied. At this time, the first correction coefficient is negatively correlated with the current torque and the intensity of the driving condition represented by the driving mode. Therefore, the higher the current torque of the engine and the more intense the driving condition corresponding to the driving mode, the lower the correction coefficient, the smaller the limiting torque, and the lower the torque at which the engine is controlled to work, thereby achieving cooling.

[0073] Of course, in other embodiments, the limiting torque can be negatively correlated with the correction coefficient, at which time the first correction coefficient (i.e., correction coefficient A1) is positively correlated with the current torque and the intensity of the driving condition represented by the driving mode.

[0074] The ambient temperature and the vehicle speed can represent the current heat circulation of the vehicle. The higher the ambient temperature, the worse the heat dissipation effect, and the higher the vehicle speed, the stronger the heat generation ability. At this time, the current temperature of the parts is theoretically higher, and therefore, the torque needs to be limited to a greater extent to achieve the purpose of cooling.

[0075] In some embodiments of the present application, the second correction coefficient can be determined according to the ambient temperature and the vehicle speed by querying a third control table. The third control table records the corresponding relationship between the ambient temperature and the vehicle speed and the second correction coefficient. For example, Table 4 below is an example of the third control table, in which TBD indicates that the value can be different according to the vehicle model.

[0076] Table 4

[0077] In Table 4, when the vehicle speed is 0 km / h and the ambient temperature is -40°C, the corresponding TBD second correction coefficient is; when the vehicle speed is 30 km / h and the ambient temperature is -40°C, the corresponding TBD second correction coefficient is; and the meanings of other values in Table 4 can be obtained in the same way.

[0078] In some embodiments of the present application, the limiting torque can be positively correlated with the correction coefficient, for example, the correction coefficient is added or multiplied. At this time, the second correction coefficient is negatively correlated with the ambient temperature and the vehicle speed, so that the higher the ambient temperature and the higher the vehicle speed, the lower the second correction coefficient, the lower the limiting torque after correction, and the lower the torque at which the engine is controlled to work, thereby achieving cooling.

[0079] Of course, in other embodiments, the limiting torque can be negatively correlated with the correction coefficient, at which time the second correction coefficient (i.e., correction coefficient A2) is positively correlated with the ambient temperature and the vehicle speed.

[0080] In some embodiments of the present application, the limiting torque T can be represented as: T = initial torque T1 x correction coefficient A1 x correction coefficient A2.

[0081] In some embodiments of the present application, determining whether the vehicle satisfies the torque limiting condition according to the sensor state and the intake temperature can comprise: if the sensor state is the fault state and the temperature sensor is in the fault state for a duration greater than a second duration threshold, determining that the vehicle satisfies the torque limiting condition.

[0082] Specifically, if the temperature sensor signal error, the temperature sensor line voltage is too high or the temperature sensor line voltage is too low is detected, the sensor state can be confirmed as the fault state. If the sensor state is the fault state, the delay timer B2 can start counting, and if the count value exceeds the second duration threshold T2, it is determined that the vehicle satisfies the torque limiting condition, triggering the torque limitation. The engine control module of the vehicle can control the engine to operate at a limited torque. The second duration threshold can be set according to actual conditions, for example, the second duration threshold can be set to 10s.

[0083] Since the intake temperature value is distorted when the temperature sensor fails, the engine control module can limit the torque by the vehicle speed and the current torque of the engine to ensure the safety of the vehicle.

[0084] Specifically, in some embodiments of the present application, obtaining driving scene information of the vehicle and determining the limited torque according to the driving scene information can comprise: if the sensor state is the fault state, taking the second information of the vehicle as the driving scene information, and determining the limited torque according to the second information.

[0085] The second information can include the vehicle speed and / or the current torque of the engine.

[0086] Specifically, the higher the vehicle speed, the stronger the heat production capacity, the higher the current torque of the engine, and the more intense the driving working condition of the vehicle. At this time, the theoretical heat of the parts is higher, and the torque needs to be limited to a greater extent.

[0087] In some embodiments of the present application, the second information includes the vehicle speed and the current torque of the engine; and determining the limited torque according to the second information can comprise: determining the limited torque according to the vehicle speed and the current torque of the engine, and the limited torque is negatively correlated with the vehicle speed and the current torque of the engine.

[0088] Specifically, the limited torque can be determined by querying a fourth control table according to the vehicle speed and the current torque of the engine. The fourth control table records the corresponding relationship between the vehicle speed, the current torque and the limited torque. For example, Table 5 below is an example of the fourth control table, where TBD indicates that the value can be different according to the vehicle model. For a single vehicle model, the limited torque in the fourth control table can be negatively correlated with the vehicle speed and the current torque of the engine, so that the higher the vehicle speed and the higher the current torque, the smaller the limited torque, and thus the engine is controlled to work at a lower torque, achieving cooling.

[0089] Table 5

[0090] In Table 5, when the vehicle speed is 0 km / h, the current torque is 150 N·m, the corresponding TBD limiting torque; when the vehicle speed is 30 km / h, the current torque is 150 N·m, the corresponding TBD limiting torque; and so on, the meanings of other values in Table 5 can be obtained.

[0091] In some embodiments of the present application, if the sensor state is switched from the fault state to the normal working state, and the duration of the temperature sensor in the normal working state is greater than a third duration threshold, it is determined that the vehicle does not meet the torque limiting condition.

[0092] Specifically, if the sensor state is a fault state, the delay timer B2 can start counting, and if the count value is less than or equal to the second duration threshold T2, i.e., it does not exceed the second duration threshold T2, it means that the duration of the sensor fault is short, and the sensor may be out of the fault state and restored to the normal working state through self-checking.

[0093] Correspondingly, if it is detected that the sensor state is switched from the fault state to the normal working state, the duration of the sensor state in the normal working state is timed, and if the duration of the sensor state in the normal working state is greater than the third duration threshold, it means that the sensor has not failed for a long duration, and the output torque of the engine does not need to be limited, and it can be determined that the vehicle does not meet the torque limiting condition, and the output torque limitation of the engine is stopped.

[0094] Specifically, if it is detected that the fault is eliminated, the elimination time timer B3 can start counting, and if the count value reaches the third duration threshold T3, the torque limitation is stopped, i.e., the output torque limitation of the engine is stopped. The third duration threshold can be set according to the actual situation, for example, the third duration threshold can be set to 8s. It should be noted that for the foregoing method embodiments, in order to simply describe, they are all expressed as a series of action combinations, but those skilled in the art should know that the present application is not limited by the described action sequence, because according to the present application, certain steps can be performed in other order.

[0095] It should be noted that the initial torque, the first correction coefficient, the second correction coefficient, and the limiting torque in the above Tables 2 to 5 can be set according to the heat resistance level of the vehicle model or the parts. For example, the higher the temperature resistance level of the parts, the higher the corresponding TBD value result can be.

[0096] In some embodiments of the present application, the first information includes vehicle model information of the vehicle and / or a heat resistance level of a vehicle component, the engine speed, and the vehicle component represents a component through which the intake air flows; and determining the limit torque according to the first information can include: determining an initial torque according to the engine speed and the intake air temperature, the initial torque being negatively correlated with both the engine speed and the intake air temperature; determining a third correction coefficient and a fourth correction coefficient based on the vehicle model information of the vehicle and / or the heat resistance level of the vehicle component; and correcting the initial torque according to the third correction coefficient and the fourth correction coefficient to obtain the limit torque.

[0097] Specifically, when determining the limit torque according to the first information, the initial torque can be determined by querying a first control table (i.e., Table 2 described above) according to the engine speed and the intake air temperature. The vehicle model information of the vehicle and / or the heat resistance level of the vehicle component are obtained, and the third correction coefficient and the fourth correction coefficient corresponding to the vehicle model information and / or the heat resistance level of the vehicle component are determined according to the obtained vehicle model information and / or the heat resistance level of the vehicle component. The initial torque is corrected according to the determined third correction coefficient (i.e., correction coefficient A3) and the fourth correction coefficient (i.e., correction coefficient A4) to obtain the limit torque.

[0098] In some embodiments of the present application, the limit torque T can be represented as: T = initial torque T1 x correction coefficient A3 x correction coefficient A4.

[0099] The vehicle component can represent a component through which the intake air flows, for example, at least one of a turbocharger, an intercooler intake pipe, and a fuel desorption pipe.

[0100] As shown in FIG. 3, the engine torque control device 300 provided by an embodiment of the present application is a structural schematic diagram of an engine torque control device 300. The engine torque control device 300 is configured in a vehicle.

[0101] Specifically, the engine torque control device 300 can include:

[0102] The obtaining unit 301 is configured to obtain a sensor state of a temperature sensor and an intake air temperature collected by the temperature sensor, the intake air temperature being an intake air temperature after being pressurized by a turbocharger.

[0103] The determining unit 302 is configured to determine whether the vehicle satisfies a torque limiting condition according to the sensor state and the intake air temperature.

[0104] The determining unit 303 is configured to, if the vehicle satisfies the torque limiting condition, obtain driving scene information of the vehicle, and determine a limit torque according to the driving scene information.

[0105] The control unit 304 is configured to control the output torque of the engine to be less than or equal to the limit torque.

[0106] In some embodiments of the present application, the determining unit 302 can be specifically configured to: if the sensor state is the normal working state, and the duration that the intake temperature is greater than or equal to the first temperature threshold value is greater than the first duration threshold value, determine that the vehicle meets the torque limiting condition; and if the sensor state is the fault state, and the duration that the temperature sensor is in the fault state is greater than the second duration threshold value, determine that the vehicle meets the torque limiting condition.

[0107] In some embodiments of the present application, the determining unit 303 can be specifically configured to: if the sensor state is the normal working state, take the first information of the vehicle as the driving scene information, the first information including at least one of the ambient temperature of the environment, the vehicle speed, the driving mode, the speed of the engine and the current torque of the engine; and determine the limiting torque according to the first information.

[0108] In some embodiments of the present application, the first information includes the ambient temperature of the environment, the vehicle speed, the driving mode, the speed of the engine and the current torque of the engine; and the determining unit 303 can be specifically configured to: determine the initial torque according to the speed and the intake temperature, the initial torque being negatively correlated with the speed and the intake temperature; determine the correction coefficient according to the ambient temperature, the driving mode, the current torque of the engine and the vehicle speed; and correct the initial torque according to the correction coefficient to obtain the limiting torque.

[0109] In some embodiments of the present application, the correction coefficient includes a first correction coefficient and a second correction coefficient; and the determining unit 303 can be specifically configured to: determine the first correction coefficient according to the driving mode and the current torque; and determine the second correction coefficient according to the ambient temperature and the vehicle speed.

[0110] In some embodiments of the present application, the limiting torque is positively correlated with the correction coefficient; the first correction coefficient is negatively correlated with the current torque and the intensity of the driving condition represented by the driving mode; and / or, the second correction coefficient is negatively correlated with the ambient temperature and the vehicle speed.

[0111] In some embodiments of the present application, the determining unit 303 can be specifically configured to: if the sensor state is the fault state, take the second information of the vehicle as the driving scene information, the second information including the vehicle speed and the current torque of the engine; and determine the limiting torque according to the second information.

[0112] In some embodiments of the present application, the control unit 304 can be specifically configured to: if the intake temperature is less than the second temperature threshold value, stop limiting the output torque of the engine.

[0113] In some embodiments of the present application, the determining unit 303 can be specifically configured to: determine the limiting torque according to the vehicle speed and the current torque of the engine, the limiting torque being negatively correlated with the vehicle speed and the current torque of the engine.

[0114] In some embodiments of the present application, the control unit 304 can be specifically configured to: if the current output torque of the engine is greater than the limit torque, control the output torque of the engine to be the limit torque; and if the current output torque of the engine is less than or equal to the limit torque, control the output torque of the engine to be the current output torque of the engine.

[0115] In some embodiments of the present application, the determination unit 302 can be specifically configured to: if the sensor state is the normal working state, and if the intake air temperature is less than the first temperature threshold, or the duration that the intake air temperature is greater than or equal to the first temperature threshold is less than or equal to the first duration threshold, determine that the vehicle does not satisfy the torque limiting condition; and if the sensor state switches from the fault state to the normal working state, and the duration that the temperature sensor is in the normal working state is greater than the third duration threshold, determine that the vehicle does not satisfy the torque limiting condition.

[0116] In some embodiments of the present application, the determination unit 303 can be further configured to: determine the current driving demand of the user in the vehicle; and determine the driving mode based on the current driving demand, the driving mode including at least one of a sand mode, a mud mode, a snow mode, a sport mode, an economy mode, and a standard mode.

[0117] In some embodiments of the present application, the determination unit 303 can be further configured to: determine the initial torque according to the rotation speed and the intake air temperature, the initial torque being negatively correlated with the rotation speed and the intake air temperature; determine the third correction coefficient and the fourth correction coefficient based on the vehicle model information and / or the heat resistance level of the vehicle components; and correct the initial torque according to the third correction coefficient and the fourth correction coefficient to obtain the limit torque.

[0118] It should be noted that, for the convenience and brevity of description, the specific working process of the engine torque control device 300 can refer to the corresponding process of the method of FIGS. 1-2, which will not be described here.

[0119] As shown in FIG. 4, a schematic diagram of a vehicle according to an embodiment of the present application is provided. Specifically, the vehicle 4 can include a processor 40, a memory 41, and a computer program 42 stored in the memory 41 and executable on the processor 40, such as an engine torque control program.

[0120] The processor 40 can be a vehicle controller and / or an ECM.

[0121] The processor 40 implements the steps in the embodiments of the method for controlling torque of the engine described above when executing the computer program 42, for example, steps S101-S104 shown in FIG. 1. Alternatively, the processor 40 implements the functions of the modules / units in the embodiments of the device described above when executing the computer program 42, for example, the functions of the acquisition unit 301, the determination unit 302, the determination unit 303, and the control unit 304 shown in FIG. 3.

[0122] The computer program can be divided into one or more modules or units, which are stored in the memory 41 and executed by the processor 40 to complete the present application. One or more modules or units can be a series of computer program instruction segments capable of completing a specific function, which are used to describe the execution process of the computer program in the vehicle.

[0123] For example, the computer program can be divided into an acquisition unit, a determination unit, a determination unit, and a control unit. The specific functions of each unit are as follows: the acquisition unit is configured to acquire the sensor state of the temperature sensor and the intake temperature collected by the temperature sensor, the intake temperature being the intake temperature after being pressurized by the turbocharger; the determination unit is configured to determine whether the vehicle satisfies the torque limiting condition according to the sensor state and the intake temperature; the determination unit is configured to acquire the driving scene information of the vehicle if the vehicle satisfies the torque limiting condition, and determine the limiting torque according to the driving scene information; and the control unit is configured to control the output torque of the engine to be less than or equal to the limiting torque.

[0124] The vehicle can include, but is not limited to, the processor 40 and the memory 41. Those skilled in the art can understand that FIG. 4 is only an example of the vehicle and does not constitute a limitation on the vehicle, and can include more or fewer components than those shown, or combine certain components, or different components, for example, the vehicle can also include an input / output device, a network access device, a bus, etc.

[0125] The processor 40 can be a central processing unit (CPU), and can also be other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), ready programmable gate arrays or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0126] The memory 41 can be an internal storage unit of the vehicle, such as a hard disk or a memory of the vehicle. The memory 41 can also be an external storage device of the vehicle, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, or the like provided on the vehicle. Further, the memory 41 can include both the internal storage unit and the external storage device of the vehicle. The memory 41 is used to store computer programs and other programs and data required by the vehicle. The memory 41 can also be used to temporarily store data that has been output or will be output.

[0127] It should be noted that, for the convenience and brevity of description, the structure of the vehicle can also refer to the specific description of the structure in the method embodiments, which will not be repeated here.

[0128] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the division of the above functional units and modules is exemplified, and in actual application, the above functions can be completed by different functional units and modules according to needs, that is, the internal structure of the device is divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiment can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of software functional unit. In addition, the specific names of each functional unit and module are only for easy distinction, and do not limit the protection scope of the present application. The specific working process of the units and modules in the system can refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

[0129] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described or recorded in detail in a certain embodiment can be referred to the related description of other embodiments.

[0130] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized in electronic hardware or a combination of computer software and electronic hardware. Whether the functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0131] In the embodiments of the present application, it should be understood that the disclosed devices or vehicles and methods can be implemented in other manners. For example, the division of the apparatus or vehicle embodiments described above is merely an example, and the division of the modules or units can be different, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections can be indirect couplings or communication connections through some interfaces, devices or units, and can be electrical, mechanical or other forms.

[0132] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they can be located in one place, or distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.

[0133] In addition, the functional units in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0134] If the integrated module or unit is realized in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on such understanding, all or part of the flow of the above-mentioned embodiment methods can also be completed by computer programs instructing related hardware, and the computer program can be stored in a computer readable storage medium. When the processor executes the computer program, the steps of each method embodiment described above can be implemented. The computer program includes computer program code, which can be in the form of source code, object code, executable file or some intermediate form. The computer readable medium can include any entity or device capable of carrying the computer program code, recording medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal and software distribution medium, etc. It should be noted that the contents of the computer readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction, for example, in some jurisdictions, according to legislation and patent practice, the computer readable medium does not include electrical carrier signals and telecommunication signals.

[0135] The above-described embodiments are only used to illustrate the technical solutions of the present application, but not limit them; although the present application is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A torque control method of an engine wherein, The method comprises: obtaining a sensor state of a temperature sensor and an intake air temperature collected by the temperature sensor, the intake air temperature being an intake air temperature after being pressurized by a turbocharger; determining whether a vehicle satisfies a torque limiting condition according to the sensor state and the intake air temperature; if the vehicle satisfies the torque limiting condition, obtaining driving scene information of the vehicle, and determining a limiting torque according to the driving scene information; controlling an output torque of the engine to be less than or equal to the limiting torque.

2. The engine torque control method according to claim 1, wherein, The determining whether the vehicle satisfies the torque limiting condition according to the sensor state and the intake air temperature comprises: if the sensor state is a normal working state, and a duration that the intake air temperature is greater than or equal to a first temperature threshold value is greater than a first duration threshold value, it is determined that the vehicle satisfies the torque limiting condition; if the sensor state is a fault state, and a duration that the temperature sensor is in the fault state is greater than a second duration threshold value, it is determined that the vehicle satisfies the torque limiting condition.

3. The engine torque control method according to claim 1 or 2, wherein, The obtaining the driving scene information of the vehicle and determining the limiting torque according to the driving scene information comprises: if the sensor state is the normal working state, taking first information of the vehicle as the driving scene information, the first information comprising at least one of an ambient temperature of an environment, a vehicle speed, a driving mode, a speed of the engine and a current torque of the engine; determining the limiting torque according to the first information.

4. The engine torque control method according to claim 3, wherein The first information comprises the ambient temperature of the environment, the vehicle speed, the driving mode, the speed of the engine and the current torque; and the determining the limiting torque according to the first information comprises: determining an initial torque according to the speed and the intake air temperature, the initial torque being negatively correlated with the speed and the intake air temperature; determining a correction coefficient according to the ambient temperature, the driving mode, the current torque of the engine and the vehicle speed; correcting the initial torque according to the correction coefficient to obtain the limiting torque.

5. The engine torque control method according to claim 4, wherein, The correction coefficient comprises a first correction coefficient and a second correction coefficient; The determining the correction coefficient according to the ambient temperature, the driving mode, the current torque of the engine and the vehicle speed comprises: determining the first correction coefficient according to the driving mode and the current torque; determining the second correction coefficient according to the ambient temperature and the vehicle speed.

6. The engine torque control method according to claim 5, wherein The limiting torque is positively correlated with the correction coefficient; The first correction coefficient is negatively correlated with the current torque and an intensity of a driving condition represented by the driving mode; and / or, the second correction coefficient is negatively correlated with the ambient temperature and the vehicle speed.

7. The engine torque control method according to claim 1 or 2, wherein, The obtaining the driving scene information of the vehicle and determining the limiting torque according to the driving scene information comprises: if the sensor state is the fault state, taking second information of the vehicle as the driving scene information, the second information comprising the vehicle speed and / or the current torque of the engine; determining the limiting torque according to the second information.

8. The engine torque control method according to claim 7, wherein, The second information includes a vehicle speed and a current torque of the engine; and the determining the limit torque according to the second information comprises: determining the limit torque according to the vehicle speed and the current torque of the engine, the limit torque being negatively correlated with the vehicle speed and the current torque of the engine.

9. The engine torque control method according to any one of claims 1 to 8, wherein, after controlling the output torque of the engine to be less than or equal to the limit torque, further comprising: if the sensor state is the normal working state and the intake air temperature is less than a second temperature threshold, stopping the limit of the output torque of the engine.

10. The engine torque control method according to any one of claims 1 to 9, wherein, The controlling the output torque of the engine to be less than or equal to the limit torque comprises: if the current output torque of the engine is greater than the limit torque, controlling the output torque of the engine to be the limit torque; if the current output torque of the engine is less than or equal to the limit torque, controlling the output torque of the engine to be the current output torque of the engine.

11. The engine torque control method according to any one of claims 2 to 10, wherein, Further comprising: if the sensor state is the normal working state, and the intake air temperature is less than the first temperature threshold, or the duration that the intake air temperature is greater than or equal to the first temperature threshold is less than or equal to the first duration threshold, determining that the vehicle does not satisfy the torque limit condition; if the sensor state is switched from the fault state to the normal working state, and the duration that the temperature sensor is in the normal working state is greater than a third duration threshold, determining that the vehicle does not satisfy the torque limit condition.

12. The engine torque control method according to any one of claims 3 to 6, wherein, Further comprising: determining a current driving demand of a user in the vehicle; determining the driving mode based on the current driving demand, the driving mode comprising at least one of a sand mode, a mud mode, a snow mode, a sport mode, an economy mode, and a standard mode.

13. The engine torque control method according to claim 3, wherein, The first information includes vehicle model information of the vehicle and / or a heat resistance level of a vehicle component, the vehicle component representing a component through which intake air flows; and the determining the limit torque according to the first information comprises: determining an initial torque according to the speed and the intake air temperature, the initial torque being negatively correlated with the speed and the intake air temperature; determining a third correction coefficient and a fourth correction coefficient based on the vehicle model information and / or the heat resistance level of the vehicle component; correcting the initial torque according to the third correction coefficient and the fourth correction coefficient to obtain the limit torque.

14. A torque control device for an engine wherein, comprising: an acquisition unit, configured to acquire a sensor state of a temperature sensor and an intake air temperature collected by the temperature sensor, the intake air temperature being an intake air temperature after being pressurized by a turbocharger; a determination unit, configured to determine whether a vehicle satisfies a torque limit condition according to the sensor state and the intake air temperature; a determination unit, configured to acquire driving scene information of the vehicle if the vehicle satisfies the torque limit condition, and determine a limit torque according to the driving scene information; a control unit, configured to control an output torque of the engine to be less than or equal to the limit torque.

15. A vehicle comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein, The processor, when executing the computer program, implements the steps of the torque control method of the engine according to any one of claims 1 to 13.

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