Torque control method for engine, storage medium, and vehicle

Abstract

The application is suitable for the field of automobile technology, and provides a torque control method of an engine, a storage medium and a vehicle. The torque control method of the engine comprises the following steps: acquiring a sensor state of a temperature sensor and an intake temperature collected by the temperature sensor, wherein the intake temperature is an intake temperature after turbocharging; determining whether a vehicle satisfies a torque limiting condition according to the sensor state and the intake temperature; if the vehicle satisfies 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. The embodiment of the application can reduce the problem of component wear caused by excessively high intake temperature after turbocharging.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of automobiles, and particularly relates to a torque control method of an engine, a storage medium and a vehicle. BACKGROUND

[0002] With the increase of off-road crowds, off-road vehicle owners have higher and higher requirements for the off-road performance of vehicles. Most off-road vehicles will be configured with turbochargers 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 has problems such as pipeline thermal fatigue aging and loss, which has great hidden danger to safety and disaster prevention, and even causes fire, seriously affecting the safety of customers' lives. SUMMARY

[0003] The embodiments of the application provide a torque control method of an engine, a storage medium and a vehicle, which can reduce the problem of part loss caused by too high intake temperature after supercharging.

[0004] The first aspect of the embodiments of the application provides a torque control method of an 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.

[0005] In some embodiments of the application, the determining whether the vehicle meets the torque limiting condition according to the sensor state and the intake temperature comprises: if the sensor state is a normal working state, and a duration that the intake temperature is greater than or equal to a first temperature threshold value is greater than a first time threshold value, it is determined that the vehicle meets the torque limiting condition; and 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 time threshold value, it is determined that the vehicle meets the torque limiting condition.

[0006] In some embodiments of the application, the acquiring 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; and determining the limiting torque according to the first information.

[0007] In some embodiments of the present application, the first information comprises an ambient temperature of an environment in which the vehicle is located, a vehicle speed, a driving mode, a rotation speed of the engine, and a current torque of the engine; and the determining the limit torque according to the first information comprises: determining an initial torque according to the rotation speed and the intake temperature, the initial torque being negatively correlated with both the rotation speed and the intake temperature; determining a correction coefficient according to the ambient temperature, the driving mode, the current torque of the engine, and the vehicle speed; and correcting the initial torque according to the correction coefficient to obtain the limit torque.

[0008] In some embodiments of the present application, the correction coefficient comprises a first correction coefficient and a second correction coefficient; and the determining the correction coefficient according to the ambient temperature, the driving mode, the current torque, and the vehicle speed comprises: determining the first correction coefficient according to the driving mode and the current torque; and determining the second correction coefficient according to the ambient temperature and the vehicle speed.

[0009] In some embodiments of the present application, the limit torque is positively correlated with the correction coefficient; the first correction coefficient is negatively correlated with both 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 both the ambient temperature and the vehicle speed.

[0010] In some embodiments of the present application, the obtaining the driving scene information of the vehicle and determining the limit torque according to the driving scene information comprises: if the sensor state is a fault state, taking second information of the vehicle as the driving scene information, the second information comprising a vehicle speed and / or a current torque of the engine; and determining the limit torque according to the second information.

[0011] In some embodiments of the present application, after the controlling the output torque of the engine to be less than or equal to the limit torque, the method further comprises: if the sensor state is a normal working state and the intake temperature is less than a second temperature threshold, stopping the limiting the output torque of the engine.

[0012] The second aspect of the embodiments of the present application provides an engine torque control device, comprising: an obtaining unit configured to obtain a sensor state of a temperature sensor and an intake temperature collected by the temperature sensor, the intake temperature being an intake temperature after being pressurized by a turbocharger; a determining unit configured to determine whether a vehicle satisfies a torque limiting condition according to the sensor state and the intake temperature; a determining unit 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; and a control unit configured to control an output torque of the engine to be less than or equal to the limit torque.

[0013] The third aspect of the embodiments of the present application provides a computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to implement the steps of the torque control method of the engine.

[0014] The fourth aspect of the embodiments 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, and the processor implements the steps of the torque control method of the engine when executing the computer program.

[0015] The fifth aspect of the embodiments 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.

[0016] In the embodiments of the present application, by acquiring the sensor state of the temperature sensor and the intake air temperature after turbocharging collected by the temperature sensor, whether the vehicle meets the torque limiting condition is determined according to the sensor state and the intake air temperature, 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, and the output torque of the engine is controlled to be less than or equal to the limiting torque, so that the torque output can be limited when the intake air temperature after turbocharging is too high, and the problem of part wear caused by the too high intake air temperature after turbocharging can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiments or prior art description will be briefly introduced as follows. 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.

[0018] Figure 1 is an implementation flow diagram of a torque control method of an engine provided by the embodiments of the present application;

[0019] Figure 2 is a specific implementation flow diagram for determining a limiting torque provided by the embodiments of the present application;

[0020] Figure 3 is a structure diagram of a torque control device of an engine provided by the embodiments of the present application;

[0021] Figure 4 is a structure diagram of a vehicle provided by the embodiments of the present application. DETAILED DESCRIPTION

[0022] 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.

[0023] 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 are prone to reaching their temperature limits, leading to issues such as thermal fatigue and aging of piping. This poses a significant safety hazard, potentially causing fires and seriously endangering the lives of customers.

[0024] Taking the test results of a certain model vehicle in the Ulan Buh Desert directly up Mount Everest as an example, after 8 consecutive uphill runs, as shown in Table 1, the turbocharger, intercooler intake pipe, and fuel desorption pipe all exceeded the temperature resistance standard, posing a safety hazard.

[0025]

[0026] Table 1

[0027] 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.

[0028] It should be noted that the embodiments of this application are based on the above findings and analyses, which are not prior art but should be regarded as part of the contribution of this application to the prior art.

[0029] To illustrate the technical solution of this application, specific embodiments are described below.

[0030] Figure 1 The illustration shows a schematic flowchart of an engine torque control method provided in an embodiment of this application, which can be applied to vehicles.

[0031] In embodiments of this application, the vehicle described above may be equipped with a turbocharger and a temperature sensor. The turbocharger increases the engine's intake air volume by compressing air, allowing more air to enter the combustion chamber, thereby improving combustion efficiency and enabling the engine to release more energy and increase power output with the same displacement. The temperature sensor may be located on one side of the turbocharger to measure the intake air temperature after being pressurized by the turbocharger.

[0032] Specifically, the torque control method of the engine can include the following steps S101 to S104.

[0033] In step S101, a sensor state of a temperature sensor and an intake air temperature collected by the temperature sensor are obtained.

[0034] In embodiments of the present application, the sensor state refers to the operating state of the temperature sensor, which can include a normal working state and a fault state, and can be determined by self-checking of the temperature sensor or by determining whether the intake air temperature exceeds a normal range. The intake air temperature is the temperature of the intake air after being pressurized by a turbocharger.

[0035] In step S102, it is determined whether the vehicle satisfies a torque limiting condition according to the sensor state and the intake air temperature.

[0036] In embodiments of the present application, the torque limiting condition can indicate that a component of the vehicle may reach a 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 component will reach the temperature resistance boundary. Therefore, according to the sensor state and the intake air temperature, it can be determined whether the vehicle satisfies the torque limiting condition.

[0037] In step S103, if the vehicle satisfies the torque limiting condition, driving scene information of the vehicle is obtained, and the limiting torque is determined according to the driving scene information.

[0038] If the vehicle satisfies the torque limiting condition, it means that the component will reach the temperature resistance boundary, and at this time, the driving scene information of the vehicle needs to be obtained, and the limiting torque is determined according to the driving scene information, so that the limiting torque is adapted to the current driving scene of the vehicle. The driving scene information represents the driving scene of the vehicle, which can include but is not limited to vehicle speed, ambient temperature of the environment, driving mode, and engine speed in the vehicle.

[0039] Correspondingly, if the vehicle does not satisfy the torque limiting condition, it means that the component does not reach the temperature resistance boundary, and no torque limiting processing is needed.

[0040] In step S104, the output torque of the engine is controlled to be less than or equal to the limiting torque.

[0041] Specifically, if the output torque of the engine is greater than the limiting torque, the output torque of the engine needs to be reduced to be less than or equal to the limiting torque, and if the output torque of the engine is less than or equal to the limiting torque, no processing is needed.

[0042] 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 meets the torque limiting condition according to the sensor state and the intake air temperature, 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, and the output torque of the engine is controlled to be less than or equal to the limiting torque, so that the torque output can be limited when the intake air temperature after turbocharging is too high, and the problem of component wear caused by the too high intake air temperature after turbocharging can be reduced.

[0043] In some embodiments of the present application, determining whether the vehicle meets 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 meets the torque limiting condition.

[0044] 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 meets the torque limiting condition, the limit torque 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°C, and the first time threshold can be set to 90s.

[0045] 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.

[0046] 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 limit torque 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.

[0047] In some embodiments of the present application, as shown in Figure 2 acquiring the driving scene information of the vehicle and determining the limiting torque according to the driving scene information can include steps S201 to S202.

[0048] In step S201, if the sensor state is a normal working state, the first information of the vehicle is taken as the driving scene information.

[0049] The first information can include at least one of an ambient temperature of an environment, a vehicle speed, a driving mode, a speed of an engine, and a current torque. The ambient temperature can be collected by an ambient temperature sensor configured by the vehicle, or obtained by networking to acquire local weather information. The vehicle speed can be collected by a vehicle speed sensor, or measured by external software and hardware such as a driving recorder, a navigation device, and the like. The driving mode can be input by a user, or determined by the vehicle according to a current driving demand, and can include but is not limited to a sand mode, a mud mode, a snow mode, a sports mode, an economy mode, and a standard mode. The speed of the engine can be measured based on an electromagnetic sensor, a Hall switch element, or other components. The current torque can be measured based on a sensor on a crankshaft of the engine, or calculated based on other engine parameters such as a cylinder diameter, a piston stroke, power, speed, and the like. It can be understood that the more types of information 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.

[0050] In step S202, the limited torque is determined according to the first information.

[0051] By comprehensively considering the various first information, the limited torque can be determined so as to meet the driving scene demand of the vehicle.

[0052] In some embodiments of the present application, the first information can include an ambient temperature of an environment, a vehicle speed, a driving mode, a speed of an engine, and a current torque. The vehicle can determine an initial torque according to the 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 limited torque.

[0053] The initial torque is negatively correlated with the speed and the intake temperature.

[0054] Specifically, the speed of the engine and the intake temperature after supercharging can represent the heat condition of the internal components of the vehicle. The higher the speed of the engine and the higher the intake temperature after supercharging, the higher the theoretical temperature of the components at present, and thus a greater degree of torque limitation is required to achieve the purpose of cooling. The initial torque can represent a basic value of the limited torque, and the higher the initial torque, the higher the limited torque obtained by correction. Therefore, the higher the speed of the engine and the higher the intake temperature after supercharging, the lower the initial torque, and a greater degree of torque limitation effect can be achieved.

[0055] In some embodiments of the present application, the initial torque can be determined by querying a first control table according to the rotational speed and the intake air temperature. The first control table records the corresponding relationship between the rotational speed, the intake air temperature and the initial torque. For example, Table 2 below is an example of the first control table, wherein TBD represents to be calibrated, and the value can be different according to different vehicle models. For a single vehicle model, the initial torque in the first control table can be negatively correlated with the rotational speed of the engine and the intake air temperature after supercharging, so that the higher the rotational speed of the engine and the higher the intake air temperature after supercharging, the smaller the initial torque and the limit torque, and thus the engine is controlled to work at a lower torque, so as to achieve cooling.

[0056]

[0057]

[0058] Table 2

[0059] The correction coefficient is used to limit the initial torque, so that the final limit torque is more in line with the actual driving needs of the vehicle. The working mode of the correction coefficient can be selected according to the actual situation, for example, it can be multiplied, added or other ways to realize the correction.

[0060] 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 environmental temperature, the driving mode, the current torque and the vehicle speed, the correction coefficient can be 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 environmental temperature and the vehicle speed.

[0061] The driving mode and the current torque can represent the current power / resistance situation 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 torque needs to be limited.

[0062] 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 corresponding relationship 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, wherein TBD represents to be calibrated, and the value can be different according to different vehicle models.

[0063]

[0064] Table 3

[0065] In some embodiments of the 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.

[0066] Of course, in other embodiments, the limiting torque can be negatively correlated with the correction coefficient, at which time the first correction coefficient is positively correlated with the current torque and the intensity of the driving condition represented by the driving mode.

[0067] The ambient temperature and the vehicle speed can represent the current heat circulation condition 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 which 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.

[0068] In some embodiments of the 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 different vehicle models.

[0069]

[0070] Table 4

[0071] In some embodiments of the 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, and the lower the limiting torque after correction, and the lower the torque at which the engine is controlled to work, thereby achieving cooling.

[0072] Of course, in other embodiments, the limiting torque can be negatively correlated with the correction coefficient, at which time the second correction coefficient is positively correlated with the ambient temperature and the vehicle speed.

[0073] In some embodiments of the application, the limiting torque T can be represented as: T = initial torque T1 x correction coefficient A1 x correction coefficient A2.

[0074] In some embodiments of the present application, the determining whether the vehicle meets 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 meets the torque limiting condition.

[0075] 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 reaches the second duration threshold T2, it is determined that the vehicle meets the torque limiting condition, triggering the torque limiting. The engine control module of the vehicle can control the engine to operate according to the limited torque. The second duration threshold can be set according to actual conditions, for example, the second duration threshold can be set to 10s.

[0076] 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.

[0077] Specifically, in some embodiments of the present application, obtaining the 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.

[0078] The second information can include the vehicle speed and / or the current torque of the engine.

[0079] 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 limiting needs to be performed to a greater extent.

[0080] In some embodiments of the present application, the limited torque can be determined according to the vehicle speed and the current torque of the engine by querying a fourth control table. 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, wherein TBD indicates to be calibrated, and the value can be different according to different vehicle models. 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.

[0081]

[0082]

[0083] Table 5

[0084] 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 being in the normal working state is timed, and if the duration of the sensor state being in the normal working state is greater than a third duration threshold, the output torque limitation of the engine is stopped.

[0085] 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, that is, the output torque limitation of the engine is stopped. The third duration threshold can be set according to actual conditions, 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 application is not limited by the described action sequence, because according to the application, certain steps can be performed in other orders.

[0086] It should be noted that the initial torque, the first correction coefficient, the second correction coefficient, and the limited torque in the above Tables 2 to 5 can be set according to the heat resistance level of the vehicle model or the part. For example, the higher the heat resistance level of the part, the higher the corresponding TBD numerical result can be.

[0087] As Figure 3 shown is a structure schematic diagram of an engine torque control device 300 provided by an embodiment of the application, the engine torque control device 300 is configured in a vehicle.

[0088] Specifically, the engine torque control device 300 can include:

[0089] An acquisition unit 301 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 turbocharging.

[0090] A determination unit 302 is configured to determine whether a vehicle satisfies a torque limitation condition according to the sensor state and the intake temperature.

[0091] A determination unit 303 is configured to acquire driving scene information of the vehicle if the vehicle satisfies the torque limitation condition, and determine a limited torque according to the driving scene information.

[0092] A control unit 304 is configured to control the output torque of the engine to be less than or equal to the limited torque.

[0093] In some embodiments of the present application, the determining unit 302 can be specifically configured to: if the sensor state is a normal working state, and the intake air temperature is greater than or equal to the first temperature threshold for a duration greater than the first duration threshold, determine that the vehicle satisfies the torque limiting condition; and if the sensor state is a fault state, and the temperature sensor is in the fault state for a duration greater than the second duration threshold, determine that the vehicle satisfies the torque limiting condition.

[0094] In some embodiments of the present application, the determining unit 303 can be specifically configured to: if the sensor state is a normal working state, take first information of the vehicle as the driving scene information, the first information including 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; and determine the limiting torque according to the first information.

[0095] In some embodiments of the present application, the first information includes an ambient temperature of an environment, a vehicle speed, a driving mode, a speed of the engine, and a current torque; and the determining unit 303 can be specifically configured to: determine an initial torque according to the speed and the intake air temperature, the initial torque being negatively correlated with both the speed and the intake air 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.

[0096] 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.

[0097] 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 both 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 both the ambient temperature and the vehicle speed.

[0098] In some embodiments of the present application, the determining unit 303 can be specifically configured to: if the sensor state is a fault state, take second information of the vehicle as the driving scene information, the second information including a vehicle speed and a current torque of the engine; and determine the limiting torque according to the second information.

[0099] In some embodiments of the present application, the control unit 304 can be specifically configured to: if the intake air temperature is less than a second temperature threshold, stop limiting the output torque of the engine.

[0100] It should be noted that, for the convenience and brevity of description, the specific working process of the torque control device 300 of the engine can be referred to Figures 1 to 2 The corresponding process of the method is not described here.

[0101] As shown in Figure 4 , a schematic diagram of a vehicle is provided for the embodiments of the present application. 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 a torque control program of the engine.

[0102] The processor 40 can be a vehicle controller and / or ECM.

[0103] The processor 40 implements the steps in the above-mentioned various engine torque control method embodiments when executing the computer program 42, such as Figure 1 steps S101-S104. Alternatively, the processor 40 implements the functions of the modules / units in the above-mentioned various device embodiments when executing the computer program 42, such as Figure 3 functions of the acquisition unit 301, the determination unit 302, the determination unit 303, and the control unit 304.

[0104] The computer program can be divided into one or more modules / units, which are stored in the memory 41 and executed by the processor 40 to complete the present application. The one or more modules / 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.

[0105] 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 used 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 supercharged by the turbocharger; the determination unit is used to determine whether the vehicle meets the torque limiting condition according to the sensor state and the intake temperature; the determination unit is used to acquire the driving scene information of the vehicle if the vehicle meets the torque limiting condition, and to determine the limiting torque according to the driving scene information; the control unit is used to control the output torque of the engine to be less than or equal to the limiting torque.

[0106] The vehicle can include, but is not limited to, a processor 40, a memory 41. Those skilled in the art can understand, Figure 4The vehicle is merely an example and does not constitute a limitation on the vehicle, which can include more or fewer components than shown, or combine some components, or have different components, for example, the vehicle can also include an input / output device, a network access device, a bus, etc.

[0107] The processor 40 can be a central processing unit (CPU), and can also be other general-purpose processors, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD) or other programmable logic devices, discrete gate or transistor logic, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0108] 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, etc. 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 the computer program 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.

[0109] 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 embodiment, which will not be described here.

[0110] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the above-mentioned division of each functional unit and module is exemplified, and in actual application, the above-mentioned 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 be physically present separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be realized in the form of hardware or software. In addition, the specific name of each functional unit and module is only for the convenience of mutual distinction, and does not limit the protection scope of the present application. The specific working process of the unit and module in the above system can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

[0111] 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.

[0112] 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 executed in hardware or software depends on the specific application and design constraints of the technical solution. A person 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.

[0113] In the embodiments provided in the present application, it should be understood that the disclosed devices / vehicles and methods can be implemented in other ways. For example, the device / vehicle embodiments described above are only schematic. For example, the division of the modules or units is only a logical function division, and there can be another division in actual implementation. 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 coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or other forms.

[0114] The units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.

[0115] In addition, each of the function units in each of the embodiments 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 function unit.

[0116] The integrated module / unit, if realized in the form of a software function unit and sold or used as an independent product, can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the above-mentioned embodiment methods can also be implemented by a computer program instructing related hardware to complete, 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 files, or some intermediate forms, etc. 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 content included in 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.

[0117] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for some 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, characterized by, 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; the obtaining of the driving scene information of the vehicle and the determining of the limiting torque according to the driving scene information comprises: if the sensor state is a normal working state, taking first information of the vehicle as the driving scene information, the first information comprising an ambient temperature of an environment, a vehicle speed, a driving mode, a current torque of the engine and a speed of the engine, the driving mode comprising a sand mode, a mud mode, a snow mode, a sports mode, an economy mode and a standard mode, determining an initial torque according to the speed of the engine and the intake air temperature, the initial torque being negatively correlated with the speed of the engine 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, and correcting the initial torque according to the correction coefficient to obtain the limiting torque.

2. The engine torque control method according to claim 1, characterized by, the determining of whether the vehicle satisfies the torque limiting condition according to the sensor state and the intake air temperature comprises: if the sensor state is the 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, characterized by, the correction coefficient comprises a first correction coefficient and a second correction coefficient; the determining of 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.

4. The engine torque control method according to claim 3, characterized by, the limiting torque is positively correlated with the first correction coefficient and the second 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.

5. The engine torque control method according to claim 1, characterized by, the obtaining of the driving scene information of the vehicle and the determining of 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.

6. The engine torque control method according to any one of claims 1 to 5, characterized by, after the controlling of the output torque of the engine to be less than or equal to the limiting torque, the method further comprises: if the sensor state is the normal working state and the intake air temperature is less than a second temperature threshold value, stopping the limiting of the output torque of the engine.

7. A torque control device for an engine, characterized by comprising: The method comprises: The 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 turbocharging by a turbocharger; The determination unit is configured to determine whether the vehicle satisfies a torque limiting condition according to the sensor state and the intake temperature; The determination unit is configured to acquire driving scene information of the vehicle if the vehicle satisfies the torque limiting condition, and determine a limiting torque according to the driving scene information; The control unit is configured to control the output torque of the engine to be less than or equal to the limiting torque. The acquisition of the driving scene information of the vehicle and the determination of the limiting torque according to the driving scene information include: if the sensor state is a normal working state, taking first information of the vehicle as the driving scene information, the first information including an ambient temperature of an environment, a vehicle speed, a driving mode, a rotating speed of the engine and a current torque, the driving mode including a sand mode, a mud mode, a snow mode, a sport mode, an economy mode and a standard mode, determining an initial torque according to the rotating speed and the intake temperature, the initial torque being negatively correlated with the rotating speed and the intake temperature, determining a correction coefficient according to the ambient temperature, the driving mode, the current torque of the engine and the vehicle speed, and correcting the initial torque according to the correction coefficient to obtain the limiting torque.

8. A vehicle comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, The processor executes the computer program to implement the steps of the torque control method of the engine according to any one of claims 1 to 6.

Images