A shift method, device, vehicle and storage medium for protecting a vanadium-based SCR

Abstract

The present application relates to the technical field of vehicles, and specifically discloses a shift method and device for protecting vanadium-based SCR, a vehicle and a storage medium, wherein the shift method for protecting vanadium-based SCR, after determining that a temperature protection condition judgment enabling condition is met, obtains an actual temperature upstream of the SCR, a target temperature of an SCR temperature control model, a change rate of the target temperature, and road condition information in a set region in front of the vehicle; then, whether the temperature protection condition is met is evaluated based on the actual temperature upstream of the SCR, the target temperature, the change rate of the target temperature and the road condition information, and when the temperature protection condition is met, the gear of the vehicle is downshifted, and the SCR temperature is increased through downshifting, thereby preventing the leakage of vanadium-containing compounds. When judging whether the temperature protection condition is met, the shift method for protecting vanadium-based SCR simultaneously refers to the actual temperature upstream of the SCR, the target temperature and the change rate of the target temperature, can objectively reflect the current state of the SCR, and ensures the accuracy of the control result.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and in particular to a shifting method, apparatus, vehicle, and storage medium for protecting vanadium-based SCRs. Background Technology

[0002] Because electronically controlled mechanical automatic transmissions (AMT) do not require manual gear shifting by the driver, they can automatically adjust the gear according to the vehicle's condition.

[0003] For example, a previous patent application with application number CN202210276441.9 disclosed a vehicle shift control method. This method obtains the first actual temperature value of the SCR (Selective Catalytic Reduction) and the regeneration mode state of the DPF; determines whether the above state information meets the shift correction conditions; and, if the shift correction conditions are met, corrects the gear position based on the state information. Specifically, when correcting the gear position, the gear is adjusted to improve both the SCR conversion efficiency and the DPF regeneration efficiency. However, for vanadium-based SCRs, regulations require that vehicles equipped with vanadium-based SCR catalysts must not leak vanadium-containing compounds into the atmosphere throughout their entire lifespan. This requires that the SCR inlet temperature be below 550°C under any operating condition during vehicle use. Existing vehicle shift control methods only control shifting based on the first actual temperature value of the SCR and the regeneration mode state of the DPF, without considering the SCR temperature control model. This still carries the risk of temperature exceeding the limit, potentially leading to vanadium-containing compound leakage. Furthermore, it does not consider whether the vehicle's current operating parameters meet the shift requirements, posing a safety hazard. The SCR temperature control model provides a basis for the engine to adjust the SCR temperature, and when the engine adjusts the SCR temperature based on the SCR temperature control model, the SCR temperature can reach the target temperature after a period of time. Summary of the Invention

[0004] The purpose of this invention is to provide a shifting method, device, vehicle, and storage medium for protecting vanadium-based SCRs, in order to solve the problem that existing vehicle shifting control methods only control shifting based on the first actual temperature value of the SCR and the regeneration mode state of the DPF, without considering the SCR temperature control model, still have the risk of temperature exceeding the limit, which can easily lead to leakage of vanadium-containing compounds.

[0005] On one hand, the present invention provides a method for protecting vanadium-based SCRs by shifting gears, the method comprising:

[0006] Determine if the temperature protection conditions are met, and then determine the enable conditions.

[0007] Obtain the actual upstream temperature of the SCR;

[0008] The target temperature and the rate of change of the target temperature are obtained from the SCR temperature control model. The SCR temperature control model is used to provide a basis for the engine to adjust the temperature of the SCR, and when the engine adjusts the temperature of the SCR based on the SCR temperature control model, the temperature of the SCR can reach the target temperature after a period of time.

[0009] Obtain road condition information within a designated area in front of the vehicle. The road condition information includes the slope and curvature of the slope within the designated area in front of the vehicle. The designated area is spaced at a designated distance from the current position of the vehicle.

[0010] The temperature protection conditions are assessed based on the actual upstream temperature of the SCR, the target temperature, the rate of change of the target temperature, and the road condition information.

[0011] If the temperature protection condition is met, the vehicle will be downshifted.

[0012] As a preferred technical solution for the shifting method to protect vanadium-based SCRs, the enabling conditions for determining whether the temperature protection conditions are met include:

[0013] The vehicle's operating parameters are acquired, including engine operating mode, vehicle speed, DPF upstream temperature, engine speed, fuel injection quantity, and fault messages. The operating modes include normal mode and regeneration mode.

[0014] Determine whether the engine is in normal operating mode, whether the vehicle speed is within a first set range, whether the upstream temperature of the DPF is within a second set range, whether the engine speed is within a third set range, whether the fuel injection quantity is within a fourth set range, and whether a fault message has been received.

[0015] If the engine is operating in the normal mode, the vehicle speed is within the first set range, the upstream temperature of the DPF is within the second set range, the engine speed is within the third set range, the fuel injection quantity is within the fourth set range, and no fault message is received, then the temperature protection condition judgment enable condition is met.

[0016] As a preferred technical solution for the shifting method to protect vanadium-based SCRs, if the engine operating mode is the regeneration mode, the vehicle speed is outside the first set range, the upstream temperature of the DPF is outside the second set range, the engine speed is outside the third set range, the fuel injection quantity is outside the fourth set range, or the fault message is received, then the temperature protection condition judgment enable condition is not met.

[0017] As a preferred technical solution for the shifting method to protect vanadium-based SCRs, the assessment of whether the temperature protection conditions are met based on the actual upstream temperature of the SCR, the target temperature, the rate of change of the target temperature, and the road condition information includes:

[0018] Based on the actual upstream temperature of the SCR, assess whether the actual temperature parameters meet the requirements;

[0019] Evaluate whether the target temperature parameters meet the requirements based on the target temperature and the rate of change of the target temperature;

[0020] Based on the aforementioned road condition information, assess whether the road condition information meets the requirements;

[0021] If the actual temperature parameters meet the requirements, the target temperature parameters meet the requirements, and the road condition information meets the requirements, then the temperature protection conditions are determined to be met.

[0022] If the actual temperature parameter does not meet the requirements, the target temperature parameter does not meet the requirements, or the road condition information does not meet the requirements, then the temperature protection conditions are determined not to be met.

[0023] As a preferred technical solution for the shifting method to protect vanadium-based SCRs, assessing whether the actual temperature parameters meet the requirements based on the actual upstream temperature of the SCR includes:

[0024] Determine whether the actual temperature upstream of the SCR is greater than a first set temperature threshold and remains there for at least a first set time.

[0025] If the actual temperature upstream of the SCR is greater than the first set temperature threshold and remains so for at least the first set time, then the actual temperature parameter is considered to meet the requirements.

[0026] As a preferred technical solution for the shifting method to protect vanadium-based SCRs, evaluating whether the target temperature parameter meets the requirements based on the target temperature and the rate of change of the target temperature includes:

[0027] Determine whether the target temperature is greater than a second set temperature threshold and remains there for at least a second set time;

[0028] Determine whether the rate of change of the target temperature is greater than a set temperature change rate threshold and continues for at least a third set time.

[0029] If the target temperature is greater than the second set temperature threshold and remains so for at least the second set time, and the rate of change of the target temperature is greater than the set temperature change rate threshold and remains so for at least the third set time, then the target temperature parameter is considered to meet the requirements.

[0030] As a preferred technical solution for the shifting method to protect vanadium-based SCRs, the assessment of whether the road condition information meets the requirements based on the road condition information includes:

[0031] Determine whether the slope is greater than a set slope and remains so for at least a fourth set time.

[0032] Determine whether the bending curvature is greater than a set curvature and continues for at least a fifth set time;

[0033] If the slope is greater than the set slope and continues for at least the fourth set time, and the curvature is greater than the set curvature and continues for at least the fifth set time, then the road condition information is considered to meet the requirements.

[0034] On the other hand, the present invention also provides a shifting device for protecting vanadium-based SCRs, comprising:

[0035] The enable condition determination module is used to determine the enable conditions that meet the temperature protection conditions.

[0036] The SCR upstream actual temperature acquisition module is used to acquire the SCR upstream actual temperature.

[0037] The target temperature acquisition module is used to acquire the target temperature of the SCR temperature control model. The SCR temperature control model is used to provide a basis for the engine to adjust the temperature of the SCR, and when the engine adjusts the temperature of the SCR based on the SCR temperature control model, the temperature of the SCR can reach the target temperature after a period of time.

[0038] The target temperature change rate acquisition module is used to acquire the target temperature change rate.

[0039] The road condition information acquisition module is used to acquire road condition information in a set area in front of the vehicle. The road condition information includes the slope and curvature of the slope in the set area in front of the vehicle. The set area is separated from the current position of the vehicle by a set distance.

[0040] The temperature protection condition judgment module is used to evaluate whether the temperature protection condition is met based on the actual upstream temperature of the SCR, the target temperature, the rate of change of the target temperature, and the road condition information.

[0041] The downshift execution module is used to downshift the vehicle when it is determined that the temperature protection condition is met.

[0042] In another aspect, the present invention also provides a vehicle, including an engine, an automatic transmission connected to the engine, an exhaust manifold connected to the engine, an SCR disposed in the exhaust manifold, and further comprising:

[0043] The vehicle controller is used to interact with the vehicle controller to obtain the target temperature and the rate of change of the target temperature in the SCR temperature control model.

[0044] A temperature sensor is used to detect the temperature value upstream of the SCR and send the temperature value to the vehicle controller;

[0045] Electronic horizon is used to acquire road condition information in a set area in front of the vehicle and send the road condition information to the driving controller;

[0046] Memory, used to store one or more programs;

[0047] When the one or more programs are executed by the vehicle controller, the vehicle controller controls the vehicle to implement the shifting method for protecting the vanadium-based SCR as described in any of the above schemes.

[0048] In another aspect, the present invention also provides a storage medium storing a computer program thereon, which, when executed by a vehicle controller, enables the vehicle to perform a shifting method for protecting the vanadium-based SCR as described in any of the above embodiments.

[0049] The beneficial effects of this invention are as follows:

[0050] This invention provides a shifting method, apparatus, vehicle, and storage medium for protecting vanadium-based SCRs. The shifting method for protecting vanadium-based SCRs, after determining that the temperature protection conditions are met, acquires the actual upstream temperature of the SCR; acquires the target temperature and rate of change of the SCR temperature control model; and acquires road condition information within a designated area ahead of the vehicle. Then, based on the actual upstream temperature, target temperature, rate of change of the target temperature, and road condition information, it assesses whether the temperature protection conditions are met. When the temperature protection conditions are met, the vehicle downshifts. Downshifting raises the SCR temperature, thereby preventing the leakage of vanadium-containing compounds. This shifting method for protecting vanadium-based SCRs, in determining whether the temperature protection conditions are met, not only refers to the actual upstream temperature parameter but also to the target temperature and rate of change of the SCR temperature control model, objectively reflecting the current state of the SCR and ensuring accurate control results. Attached Figure Description

[0051] Figure 1 This is a flowchart of the shifting method for protecting vanadium-based SCRs in Embodiment 1 of the present invention;

[0052] Figure 2 This is a flowchart of the shifting method for protecting vanadium-based SCRs in Embodiment 2 of the present invention;

[0053] Figure 3 This is a schematic diagram of the shifting device for protecting vanadium-based SCRs in Embodiment 3 of the present invention;

[0054] Figure 4 This is a schematic diagram of the vehicle structure in Embodiment 4 of the present invention.

[0055] In the picture:

[0056] 300. Enable condition determination module; 310. SCR upstream actual temperature acquisition module; 320. Target temperature acquisition module; 330. Target temperature change rate acquisition module; 340. Road condition information acquisition module; 350. Temperature protection condition judgment module; 360. Downshift execution module;

[0057] 400. Engine; 410. Automatic transmission; 420. SCR; 430. Vehicle control system; 440. Temperature sensor; 450. Electronic horizon; 460. Memory. Detailed Implementation

[0058] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0059] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Furthermore, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0060] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0061] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0062] Example 1

[0063] Regulations require that vehicles equipped with vanadium-based SCR catalysts must not leak vanadium-containing compounds into the atmosphere throughout their entire lifespan. To achieve this, the SCR inlet temperature must be below 550°C under all operating conditions during vehicle use. Existing vehicle shift control methods obtain the first actual SCR temperature value and the DPF regeneration mode status; determine if the above status information meets shift correction conditions; and if so, correct the gear position based on the status information. This correction aims to improve both SCR conversion efficiency and DPF regeneration efficiency. However, existing vehicle shift control methods do not consider the SCR temperature control model, still posing a risk of temperature exceeding the limit, which could easily lead to vanadium-containing compound leakage. Furthermore, they do not consider whether the vehicle's current operating parameters meet the shift requirements, posing a safety hazard.

[0064] In response, this embodiment provides a shifting method for protecting vanadium-based SCRs. This shifting method can be executed by a shifting device for protecting vanadium-based SCRs. This shifting device can be implemented through software and / or hardware and integrated into the vehicle.

[0065] Specifically, such as Figure 1 As shown, Figure 1 The flowchart below shows a method for protecting a vanadium-based SCR by shifting gears according to Embodiment 1 of the present invention. This method includes the following steps:

[0066] S100: Determine if the temperature protection conditions are met and enable the condition is determined.

[0067] S110: Obtain the actual temperature upstream of the SCR.

[0068] S120: Obtain the target temperature and the rate of change of the target temperature of the SCR temperature control model.

[0069] The SCR temperature control model provides a basis for the engine to regulate the SCR temperature, and when the engine regulates the SCR temperature based on the SCR temperature control model, the SCR temperature can reach the target temperature after a period of time. Specifically, the vehicle controller can obtain the target temperature and the rate of change of the target temperature by interacting with the vehicle controller. The rate of change of the target temperature is the ratio of the difference in target temperature per unit time to the value per unit time, which can be represented as the slope of any point on the target temperature curve. In this embodiment, the SCR temperature control model is a map relating ambient temperature, ambient pressure, exhaust gas mass flow rate, and the SCR target temperature.

[0070] Understandably, the actual upstream temperature of the SCR alone cannot reflect the current state of the aftertreatment system. It's possible that the actual upstream temperature is too low, while the engine is adjusting the target temperature upwards based on the SCR temperature control model. In this case, the detected actual upstream temperature will differ significantly from the target temperature. The rate of change of the target temperature, however, reflects whether the target temperature has changed significantly. Combining the actual upstream temperature, the target temperature from the SCR temperature control model, and the rate of change of the target temperature provides a good indication of whether the current state of the SCR in the aftertreatment system is stable.

[0071] S130: Obtain road condition information within a designated area ahead of the vehicle.

[0072] The road condition information includes the slope and curvature of a designated area in front of the vehicle, with a designated distance between the designated area and the vehicle's current position. In this embodiment, the designated area and the designated distance can be set as needed. Road condition information in front of the vehicle can be obtained through an electronic horizon, or through a digital map of the slope information or a G-sensor to obtain road condition information within the designated area in front of the vehicle.

[0073] S140: Evaluate whether the temperature protection conditions are met based on the actual temperature upstream of the SCR, the target temperature, the rate of change of the target temperature, and road condition information.

[0074] If the temperature protection conditions are met, then execute S150; if the temperature protection conditions are not met, then execute S110 again.

[0075] S150: Downshift the vehicle's gear.

[0076] When the temperature protection conditions are met, it indicates that continued vehicle operation may lead to an increase in SCR temperature, potentially causing vanadium-containing compound leakage. In this embodiment, downshifting is performed when temperature protection is deemed necessary to prevent the SCR temperature from rising. It is important to note that when assessing whether the temperature protection conditions are met, a set distance is maintained between the road condition information of the designated area and the vehicle's current location. This setting allows for advance risk assessment of the designated road section and enables downshifting to mitigate risks in advance when temperature protection is deemed necessary.

[0077] The shifting method for protecting vanadium-based SCRs provided in this embodiment, after determining that the temperature protection conditions are met, acquires the actual upstream temperature of the SCR; acquires the target temperature and the rate of change of the target temperature from the SCR temperature control model; and acquires road condition information within a designated area ahead of the vehicle. Then, based on the actual upstream temperature, target temperature, rate of change of the target temperature, and road condition information, it assesses whether the temperature protection conditions are met. When the temperature protection conditions are met, the vehicle downshifts. Downshifting raises the SCR temperature, thereby preventing the leakage of vanadium-containing compounds. This shifting method for protecting vanadium-based SCRs, in determining whether the temperature protection conditions are met, not only refers to the actual upstream temperature parameter but also to the target temperature and the rate of change of the target temperature from the SCR temperature control model, objectively reflecting the current state of the SCR and ensuring accurate control results.

[0078] Example 2

[0079] This embodiment is a further refinement based on the above embodiments, such as... Figure 2 As shown, Figure 2 The flowchart below shows a method for protecting a vanadium-based SCR by shifting gears according to Embodiment 2 of the present invention. The method for protecting a vanadium-based SCR by shifting gears includes the following steps:

[0080] S200: Determine if the temperature protection conditions are met and enable the condition is determined.

[0081] S200 includes the following steps:

[0082] S201: Obtain vehicle operating parameters.

[0083] The vehicle's operating parameters include the engine's operating mode, vehicle speed, upstream temperature of the DPF (Diesel Particulate Filter), engine speed, fuel injection quantity, and fault messages. The operating modes include normal mode and regeneration mode.

[0084] The vehicle controller can obtain the engine's operating mode by interacting with the vehicle controller. It detects vehicle speed through a speed sensor, upstream temperature of the DPF through a DPF temperature sensor, engine speed through an engine speed sensor, and fuel injection quantity through a flow sensor. The vehicle controller also obtains fault messages by interacting with the vehicle controller.

[0085] The overall vehicle status can be reflected by the engine's operating mode, vehicle speed, DPF upstream temperature, engine speed, fuel injection quantity, and fault messages.

[0086] S202: Determine whether the engine is in normal mode, whether the vehicle speed is within the first set range, whether the DPF upstream temperature is within the second set range, whether the engine speed is within the third set range, whether the fuel injection quantity is within the fourth set range, and whether a fault message has been received.

[0087] If the engine is in normal mode, the vehicle speed is within the first set range, the DPF upstream temperature is within the second set range, the engine speed is within the third set range, the fuel injection quantity is within the fourth set range, and no fault message is received, then the temperature protection condition judgment enable condition is met, and step S210 can be executed; if the engine is in regenerative mode, the vehicle speed is outside the first set range, the DPF upstream temperature is outside the second set range, the engine speed is outside the third set range, the fuel injection quantity is outside the fourth set range, or a fault message is received, then the temperature protection condition judgment enable condition is not met, and step S201 can be executed.

[0088] The first, second, third, and fourth setting ranges can be set as needed. When it is determined that the temperature protection condition enable condition is met, it indicates that the vehicle's current driving state is suitable for further temperature protection condition judgment, so as to perform downshifting under appropriate conditions to prevent the SCR temperature from becoming too high. When it is determined that the temperature protection condition enable condition is not met, it indicates that the vehicle's current driving state is not suitable for further temperature protection condition judgment. For example, when the vehicle is in regeneration mode, it is not suitable to further judge the temperature protection condition in order to ensure normal after-treatment.

[0089] S210: Obtain the actual upstream temperature of the SCR.

[0090] S220: Obtain the target temperature and the rate of change of the target temperature of the SCR temperature control model.

[0091] S230: Obtain road condition information within a designated area ahead of the vehicle.

[0092] S240: Evaluate whether the temperature protection conditions are met based on the actual temperature upstream of the SCR, the target temperature, the rate of change of the target temperature, and road condition information.

[0093] If the temperature protection conditions are met, then execute S250; if the temperature protection conditions are not met, then execute S210 again.

[0094] S240 includes the following steps:

[0095] S241: Evaluate whether the actual temperature parameters meet the requirements based on the actual temperature upstream of the SCR.

[0096] Specifically, assessing whether the actual temperature parameters meet the requirements based on the actual upstream temperature of the SCR includes:

[0097] Determine whether the actual temperature upstream of the SCR is greater than the first set temperature threshold and remains so for at least the first set time.

[0098] If the actual temperature upstream of the SCR is greater than the first set temperature threshold and lasts for at least the first set time, the actual temperature parameter is considered to meet the requirements, and S242 is executed. If the actual temperature upstream of the SCR is not greater than the first set temperature threshold, or the duration for which the actual temperature upstream of the SCR is greater than the first set temperature threshold is less than the first set time, the actual temperature parameter is considered to not meet the requirements, and S210 is executed.

[0099] The first set temperature threshold and the first set time can be set as needed.

[0100] S242: Evaluate whether the target temperature parameter meets the requirements based on the target temperature and the rate of change of the target temperature.

[0101] Specifically, assessing whether the target temperature parameter meets the requirements based on the target temperature and the rate of change of the target temperature includes:

[0102] Determine whether the target temperature is greater than a second set temperature threshold and remains there for at least a second set time; and determine whether the rate of change of the target temperature is greater than a set temperature change rate threshold and remains there for at least a third set time.

[0103] If the target temperature is greater than the second set temperature threshold and lasts for at least the second set time, and the rate of change of the target temperature is greater than the set temperature change rate threshold and lasts for at least the third set time, then the target temperature parameter is considered to meet the requirements, and S243 is executed; if the target temperature is not greater than the second set temperature threshold, or the duration of the target temperature being greater than the second set temperature threshold is less than the second set time, or the rate of change of the target temperature is not greater than the set temperature change rate threshold, or the duration of the target temperature change rate being greater than the set temperature change rate threshold is less than the third set time, then the target temperature parameter is considered not to meet the requirements, and S210 is executed.

[0104] The second set temperature threshold, the second set time, the set temperature change rate threshold, and the third set time can be set as needed.

[0105] S243: Evaluate whether road condition information meets the requirements based on road condition information.

[0106] Specifically, assessing whether road condition information meets the requirements based on road condition information includes:

[0107] Determine whether the slope is greater than the set slope and continues for at least the fourth set time; and determine whether the curvature is greater than the set curvature and continues for at least the fifth set time.

[0108] If the slope is greater than the set slope and continues for at least the fourth set time, and the curvature is greater than the set curvature and continues for at least the fifth set time, then the road condition information is considered to meet the requirements, the temperature protection condition is determined to be met, and S250 is executed. If the slope is not greater than the set slope, or the duration of the slope being greater than the set slope is less than the fourth set time, or the curvature is not greater than the set curvature, or the duration of the curvature being greater than the set curvature is less than the fifth set time, then the road condition information is considered to not meet the requirements, and S210 is executed.

[0109] The slope setting, fourth setting time, setting curvature, and fifth setting time can be set as needed.

[0110] The shifting method for protecting vanadium-based SCRs provided in this embodiment, based on the above-described embodiment one, acquires vehicle operating parameters and assesses whether the temperature protection conditions are met by determining whether the engine operating mode is normal, whether the vehicle speed is within a first set range, whether the upstream temperature of the DPF is within a second set range, whether the engine speed is within a third set range, whether the fuel injection quantity is within a fourth set range, and whether a fault message has been received. This fully considers the vehicle's current driving state. The assessment is based on whether the actual upstream temperature of the SCR is greater than a first set temperature threshold and remains so for at least a first set time; whether the target temperature is greater than a second set temperature threshold and remains so for at least a second set time; whether the rate of change of the target temperature is greater than a set temperature rate of change threshold and remains so for at least a third set time; whether the gradient is greater than a set gradient and remains so for at least a fourth set time; and whether the curvature is greater than a set curvature and remains so for at least a fifth set time.

[0111] Example 3

[0112] This embodiment provides a shifting device for protecting vanadium-based SCRs, which can perform the shifting method for protecting vanadium-based SCRs described in the above embodiment.

[0113] Specifically, Figure 3 This is a structural diagram of a shifting device for protecting vanadium-based SCRs provided in Embodiment 3 of the present invention, as shown below. Figure 3 As shown, the shifting device for protecting vanadium-based SCRs includes:

[0114] The enable condition determination module 300 is used to determine the enable condition that meets the temperature protection condition.

[0115] The SCR upstream actual temperature acquisition module 310 is used to acquire the SCR upstream actual temperature.

[0116] The target temperature acquisition module 320 is used to acquire the target temperature of the SCR temperature control model. The SCR temperature control model provides a basis for the engine to adjust the temperature of the SCR, and when the engine adjusts the temperature of the SCR based on the SCR temperature control model, the SCR temperature can reach the target temperature after a period of time.

[0117] The target temperature change rate acquisition module 330 is used to acquire the target temperature change rate.

[0118] The road condition information acquisition module 340 is used to acquire road condition information in a set area in front of the vehicle. The road condition information includes the slope and curvature of the slope in the set area in front of the vehicle, and the set distance between the set area and the current position of the vehicle.

[0119] The temperature protection condition judgment module 350 is used to assess whether the temperature protection conditions are met based on the actual temperature upstream of the SCR, the target temperature, the rate of change of the target temperature, and road condition information.

[0120] The downshift execution module 360 ​​is used to downshift the vehicle when it is determined that the temperature protection conditions are met.

[0121] The enable condition determination module 300 includes:

[0122] The operating parameter acquisition unit is used to acquire the vehicle's operating parameters, including the engine's operating mode, vehicle speed, DPF upstream temperature, engine speed, fuel injection quantity, and fault messages. The operating modes include normal mode and regeneration mode.

[0123] The condition judgment unit is used to determine whether the engine is in normal mode, whether the vehicle speed is within the first set range, whether the upstream temperature of the DPF is within the second set range, whether the engine speed is within the third set range, whether the fuel injection quantity is within the fourth set range, and whether a fault message has been received.

[0124] The first determining unit is used to determine that the temperature protection condition judgment enable condition is met when the engine operating mode is normal mode, the vehicle speed is within a first set range, the DPF upstream temperature is within a second set range, the engine speed is within a third set range, the fuel injection quantity is within a fourth set range, and no fault message is received; and is used to determine that the temperature protection condition judgment enable condition is not met when the engine operating mode is regenerative mode, the vehicle speed is outside the first set range, the DPF upstream temperature is outside the second set range, the engine speed is outside the third set range, the fuel injection quantity is outside the fourth set range, or a fault message is received.

[0125] Temperature protection condition judgment module 350 includes:

[0126] The actual temperature parameter judgment unit is used to assess whether the actual temperature parameters meet the requirements based on the actual temperature upstream of the SCR.

[0127] The target temperature parameter judgment unit is used to evaluate whether the target temperature parameter meets the requirements based on the target temperature and the rate of change of the target temperature.

[0128] The road condition information judgment unit is used to evaluate whether the road condition information meets the requirements based on the road condition information.

[0129] The second determining unit is used to determine that the temperature protection conditions are met when the actual temperature parameters meet the requirements, the target temperature parameters meet the requirements, and the road condition information meets the requirements; and it is used to determine that the temperature protection conditions are not met when the actual temperature parameters do not meet the requirements, the target temperature parameters do not meet the requirements, or the road condition information does not meet the requirements.

[0130] The shifting device for protecting vanadium-based SCRs provided in this embodiment determines whether the temperature protection condition is met by an enable condition determination module 300; acquires the actual upstream temperature of the SCR by an upstream actual temperature acquisition module 310; acquires the target temperature of the SCR temperature control model by a target temperature acquisition module 320, which provides a basis for the engine to adjust the SCR temperature and ensures that the SCR temperature reaches the target temperature after a period of time; acquires the target temperature change rate by a target temperature change rate acquisition module 330; acquires road condition information in a set area in front of the vehicle by a road condition information acquisition module 340, including the slope and curvature of the slope in the set area in front of the vehicle, and a set distance between the set area and the current position of the vehicle; evaluates whether the temperature protection condition is met by a temperature protection condition judgment module 350 based on the upstream actual temperature of the SCR, the target temperature, the target temperature change rate, and the road condition information; and downshifts the vehicle by a downshift execution module 360 ​​when the temperature protection condition is determined to be met.

[0131] Example 4

[0132] This embodiment provides a vehicle, Figure 4 This is a structural diagram of a vehicle provided in Embodiment 4 of the present invention, as shown below. Figure 4 As shown, the vehicle includes an engine 400, an automatic transmission 410, an SCR 420, a vehicle control unit 430, a temperature sensor 440, an electronic horizon 450, and a memory 460. Among these, Figure 4 An exemplary embodiment is provided, in which an engine 400, an automatic transmission 410, an SCR 420, a vehicle controller 430, a temperature sensor 440, an electronic horizon 450, and a memory 460 are connected via a bus.

[0133] In this embodiment, the automatic transmission 410 is connected to the engine 400, and the automatic transmission 410 is equipped with a shifting device capable of automatically switching gears via electronic control. The SCR 420 is installed in the exhaust pipe, which is connected to the exhaust manifold of the engine 400. The vehicle controller 430 interacts with the vehicle controller to obtain the target temperature and the rate of change of the target temperature in the SCR temperature control model. The temperature sensor 440 detects the temperature value upstream of the SCR and sends the temperature value to the vehicle controller 430. The electronic horizon 450 acquires road condition information within a designated area ahead of the vehicle and sends the road condition information to the vehicle controller 430.

[0134] Optionally, the vehicle controller 430 can obtain the engine operating mode of the vehicle by interacting with the vehicle controller, and the vehicle controller 430 can obtain fault messages by interacting with the vehicle controller. The vehicle also includes a speed sensor, a DPF temperature sensor, an engine speed sensor, and a flow sensor. Specifically, the speed sensor can detect the vehicle speed and send it to the vehicle controller 430, the DPF temperature sensor can detect the upstream temperature of the DPF and send it to the vehicle controller 430, the engine speed sensor can detect the engine speed and send it to the vehicle controller 430, and the flow sensor can detect the fuel injection quantity and send it to the vehicle controller 430.

[0135] The memory 460, as a computer-readable storage medium, can be used to store software programs, computer-executable programs, and modules, such as the program instructions / modules corresponding to the shifting method for protecting the vanadium-based SCR in the embodiments of the present invention. The vehicle controller 430 executes various vehicle functions and data processing by running the software programs, instructions, and modules stored in the memory 460, thereby implementing the shifting method for protecting the vanadium-based SCR described in the above embodiments.

[0136] The memory 460 primarily includes a program storage area and a data storage area. The program storage area stores the operating system and at least one application program required for a given function; the data storage area stores data created based on terminal usage. Furthermore, the memory 460 may include high-speed random access memory and non-volatile memory, such as at least one disk storage device, flash memory, or other non-volatile solid-state storage device. In some instances, the memory 460 may further include memory remotely configured relative to the vehicle controller 430, which can be connected to the vehicle via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0137] The vehicle provided in Embodiment 4 of the present invention and the shifting method for protecting vanadium-based SCRs provided in the above embodiments belong to the same inventive concept. Technical details not described in detail in this embodiment can be found in the above embodiments. Furthermore, this embodiment has the same beneficial effects as the shifting method for protecting vanadium-based SCRs.

[0138] Example 5

[0139] Embodiment 5 of the present invention also provides a storage medium storing a computer program thereon, which, when executed by the vehicle controller, enables the vehicle to implement the shifting method for protecting the vanadium-based SCR as described in the above embodiments of the present invention.

[0140] Of course, the computer-executable instructions provided in the embodiments of the present invention are not limited to the operations in the shifting method for protecting vanadium-based SCRs as described above, but can also perform related operations in the shifting method for protecting vanadium-based SCRs provided in the embodiments of the present invention, and have corresponding functions and beneficial effects.

[0141] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A method for protecting the shifting of vanadium-based SCRs, characterized in that, include: Determine if the temperature protection conditions are met, and then determine the enable conditions. Obtain the actual upstream temperature of the SCR; The target temperature and the rate of change of the target temperature are obtained from the SCR temperature control model. The SCR temperature control model is used to provide a basis for the engine to adjust the temperature of the SCR, and when the engine adjusts the temperature of the SCR based on the SCR temperature control model, the temperature of the SCR can reach the target temperature after a period of time. Obtain road condition information within a designated area in front of the vehicle. The road condition information includes the slope and curvature of the slope within the designated area in front of the vehicle. The designated area is spaced at a designated distance from the current position of the vehicle. The temperature protection conditions are assessed based on the actual upstream temperature of the SCR, the target temperature, the rate of change of the target temperature, and the road condition information. If the temperature protection condition is met, the vehicle will be downshifted.

2. The shifting method for protecting vanadium-based SCRs according to claim 1, characterized in that, The conditions for determining whether temperature protection is met include the following: The vehicle's operating parameters are acquired, including engine operating mode, vehicle speed, DPF upstream temperature, engine speed, fuel injection quantity, and fault messages. The operating modes include normal mode and regeneration mode. Determine whether the engine is in normal operating mode, whether the vehicle speed is within a first set range, whether the upstream temperature of the DPF is within a second set range, whether the engine speed is within a third set range, whether the fuel injection quantity is within a fourth set range, and whether a fault message has been received. If the engine is operating in the normal mode, the vehicle speed is within the first set range, the upstream temperature of the DPF is within the second set range, the engine speed is within the third set range, the fuel injection quantity is within the fourth set range, and no fault message is received, then the temperature protection condition judgment enable condition is met.

3. The shifting method for protecting vanadium-based SCRs according to claim 2, characterized in that, If the engine is in the regeneration mode, the vehicle speed is outside the first set range, the upstream temperature of the DPF is outside the second set range, the engine speed is outside the third set range, the fuel injection quantity is outside the fourth set range, or the fault message is received, then the temperature protection condition judgment enable condition is not met.

4. The shifting method for protecting vanadium-based SCRs according to claim 1, characterized in that, The assessment of whether the temperature protection conditions are met based on the actual upstream temperature of the SCR, the target temperature, the rate of change of the target temperature, and the road condition information includes: Based on the actual upstream temperature of the SCR, assess whether the actual temperature parameters meet the requirements; Evaluate whether the target temperature parameters meet the requirements based on the target temperature and the rate of change of the target temperature; Based on the aforementioned road condition information, assess whether the road condition information meets the requirements; If the actual temperature parameters meet the requirements, the target temperature parameters meet the requirements, and the road condition information meets the requirements, then the temperature protection conditions are determined to be met. If the actual temperature parameter does not meet the requirements, the target temperature parameter does not meet the requirements, or the road condition information does not meet the requirements, then the temperature protection conditions are determined not to be met.

5. The shifting method for protecting vanadium-based SCRs according to claim 4, characterized in that, The assessment of whether the actual temperature parameters meet the requirements based on the actual upstream temperature of the SCR includes: Determine whether the actual temperature upstream of the SCR is greater than a first set temperature threshold and remains there for at least a first set time. If the actual temperature upstream of the SCR is greater than the first set temperature threshold and remains so for at least the first set time, then the actual temperature parameter is considered to meet the requirements.

6. The shifting method for protecting vanadium-based SCRs according to claim 4, characterized in that, Evaluating whether the target temperature parameter meets the requirements based on the target temperature and the rate of change of the target temperature includes: Determine whether the target temperature is greater than a second set temperature threshold and remains there for at least a second set time; Determine whether the rate of change of the target temperature is greater than a set temperature change rate threshold and continues for at least a third set time. If the target temperature is greater than the second set temperature threshold and remains so for at least the second set time, and the rate of change of the target temperature is greater than the set temperature change rate threshold and remains so for at least the third set time, then the target temperature parameter is considered to meet the requirements.

7. The shifting method for protecting vanadium-based SCRs according to claim 4, characterized in that, Assessing whether the traffic information meets the requirements based on the aforementioned traffic information includes: Determine whether the slope is greater than a set slope and remains so for at least a fourth set time. Determine whether the bending curvature is greater than a set curvature and continues for at least a fifth set time; If the slope is greater than the set slope and continues for at least the fourth set time, and the curvature is greater than the set curvature and continues for at least the fifth set time, then the road condition information is considered to meet the requirements.

8. A shifting device for protecting vanadium-based SCRs, characterized in that, include: The enable condition determination module is used to determine the enable conditions that meet the temperature protection conditions. The SCR upstream actual temperature acquisition module is used to acquire the SCR upstream actual temperature. The target temperature acquisition module is used to acquire the target temperature of the SCR temperature control model. The SCR temperature control model is used to provide a basis for the engine to adjust the temperature of the SCR, and when the engine adjusts the temperature of the SCR based on the SCR temperature control model, the temperature of the SCR can reach the target temperature after a period of time. The target temperature change rate acquisition module is used to acquire the target temperature change rate. The road condition information acquisition module is used to acquire road condition information in a set area in front of the vehicle. The road condition information includes the slope and curvature of the slope in the set area in front of the vehicle. The set area is separated from the current position of the vehicle by a set distance. The temperature protection condition judgment module is used to evaluate whether the temperature protection condition is met based on the actual upstream temperature of the SCR, the target temperature, the rate of change of the target temperature, and the road condition information. The downshift execution module is used to downshift the vehicle when it is determined that the temperature protection condition is met.

9. A vehicle comprising an engine, an automatic transmission drivenly connected to the engine, an exhaust manifold connected to the engine, and an SCR (Selective Catalytic Reduction) disposed in the exhaust manifold, characterized in that, Also includes: The vehicle controller is used to interact with the vehicle controller to obtain the target temperature and the rate of change of the target temperature in the SCR temperature control model. A temperature sensor is used to detect the temperature value upstream of the SCR and send the temperature value to the vehicle controller; Electronic horizon is used to acquire road condition information in a set area in front of the vehicle and send the road condition information to the driving controller; Memory, used to store one or more programs; When the one or more programs are executed by the vehicle controller, the vehicle controller controls the vehicle to implement the shifting method for protecting the vanadium-based SCR as described in any one of claims 1-7.

10. A storage medium having a computer program stored thereon, characterized in that, When the program is executed by the vehicle controller, the vehicle implements the shifting method for protecting the vanadium-based SCR as described in any one of claims 1-7.

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