Vehicle control method and device and automobile
The climbing status of new energy vehicles is judged through vehicle control methods and switched to performance mode, which solves the problem of climbing difficulties caused by insufficient torque in energy-saving mode, and achieves more stable and efficient driving.
Patent Information
- Application Number
- CN202411694268.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-25
- Publication Date
- 2025-03-21
AI Technical Summary
In the energy-saving mode of new energy vehicles, the torque generated by the traditional energy-saving mode is difficult to meet the actual torque demand, resulting in difficulties in the vehicle climbing hills and unable to automatically switch to the driving state.
Through the vehicle control method, the operating status of the target vehicle is obtained and the climbing state is judged. If the climbing torque is insufficient, switch to the performance mode to provide greater torque support.
Provide greater torque support during hill climbing, helping the vehicle climb smoothly, reducing misjudgments, improving driving stability and energy efficiency, and realizing automatic mode switching.
Smart Images
Figure CN119659627A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of automobile technology, and in particular to a vehicle control method, device and automobile. Background Art
[0002] With the rapid development of the modern automobile industry, the replacement of new energy vehicles is getting faster and faster, and the competition among major automobile manufacturers is becoming more and more fierce. The comfort, practicality and comprehensive endurance of new energy vehicles are also the main considerations when people buy new energy vehicles. The comprehensive endurance of existing new energy vehicles has reached the thousand-kilometer level. With the continuous launch of new models, their endurance is getting stronger and stronger.
[0003] In current drivability calibration, calibrators calibrate the external characteristic parameters of the test vehicle's motor through a hill climbing test to meet the vehicle's climbing torque requirements. Due to different road conditions or for endurance considerations, the external characteristic parameters are often adjusted to prioritize meeting more mileage requirements, so the setting of the energy-saving mode is more inclined during driving. However, in some cases, such as the climbing requirements under some special working conditions, the torque generated by the traditional energy-saving mode is often difficult to meet the actual torque requirements, and the vehicle's driving state may not be able to switch automatically, resulting in difficulty for the vehicle to climb hills. Summary of the invention
[0004] The main purpose of the present invention is to propose a vehicle control method, device, equipment and vehicle, aiming to solve the problem that when new energy vehicles are in energy-saving mode, the torque generated by the traditional energy-saving mode is often difficult to meet the actual torque demand, and the vehicle driving state cannot be automatically switched, which makes it difficult for the vehicle to climb hills.
[0005] To achieve the above object, the vehicle control method proposed by the present invention comprises the following steps:
[0006] In the first mode, the operating status of the target vehicle is obtained;
[0007] According to the running state of the target vehicle, determining the climbing state of the target vehicle, wherein the climbing state includes a state of insufficient climbing torque;
[0008] When the target vehicle is in a climbing state where the climbing torque is insufficient, the vehicle is controlled to switch from the first mode to the second mode.
[0009] In one embodiment, the operating state of the target vehicle includes a plurality of operating parameters, and the plurality of operating parameters include a pedal opening, a first actual speed, an actual torque value, and a battery temperature change rate.
[0010] In one embodiment, judging the climbing state of the target vehicle according to the running state of the target vehicle includes:
[0011] When all of the operating parameters satisfy the insufficient climbing torque condition, determining that the climbing state of the target vehicle is in the insufficient climbing torque state;
[0012] When at least one of the operating parameters satisfies a sufficient climbing torque condition, it is determined that the climbing state of the target vehicle is in a sufficient climbing torque state.
[0013] In one embodiment, all of the operating parameters satisfy the insufficient climbing torque condition, including:
[0014] When the actual pedal opening is greater than the pedal opening reference value, the actual first actual speed is less than the preset speed reference value and the actual torque reaches the preset peak torque reference value, and the actual battery temperature change rate is greater than the preset battery temperature change rate reference value, the climbing torque deficiency condition is met.
[0015] In one embodiment, at least one of the operating parameters satisfies the sufficient climbing torque condition, including:
[0016] When the actual pedal opening is less than the pedal opening reference value, or the actual first actual speed is greater than the preset speed reference value and the actual torque is less than the preset peak torque reference value, or the actual battery temperature change rate is less than the battery temperature change rate reference value, the climbing torque sufficient condition is met.
[0017] In one embodiment, after controlling the vehicle to switch from the first mode to the second mode, the method includes:
[0018] Acquire a second actual speed and an actual torque of the target vehicle in the second mode;
[0019] When the second actual speed is greater than the preset speed reference value and the actual torque decreases linearly, the vehicle is controlled to switch from the second mode to the first mode.
[0020] In one embodiment, controlling the vehicle to switch from the first mode to the second mode includes:
[0021] In the second mode, the driving motor in the vehicle is controlled to output torque at a preset peak torque reference value.
[0022] In one embodiment, the first mode comprises an energy-saving mode of the vehicle; and / or,
[0023] The second mode comprises a performance mode of the vehicle.
[0024] The present invention further provides a vehicle control device, the vehicle control device comprising a processor, the processor comprising an execution program capable of executing steps of a vehicle control method, the vehicle control method comprising the following control steps:
[0025] In the first mode, the operating status of the target vehicle is obtained;
[0026] According to the running state of the target vehicle, determining the climbing state of the target vehicle, wherein the climbing state includes a state of insufficient climbing torque;
[0027] When the target vehicle is in a climbing state where the climbing torque is insufficient, the vehicle is controlled to switch from the first mode to the second mode.
[0028] The present invention further provides an automobile, the automobile comprising a vehicle control device, the vehicle control device comprising a processor, the processor comprising an execution program capable of executing steps of a vehicle control method, the vehicle control method comprising the following control steps:
[0029] In the first mode, the operating status of the target vehicle is obtained;
[0030] According to the running state of the target vehicle, determining the climbing state of the target vehicle, wherein the climbing state includes a state of insufficient climbing torque;
[0031] When the target vehicle is in a climbing state where the climbing torque is insufficient, the vehicle is controlled to switch from the first mode to the second mode.
[0032] In the technical solution of the present invention, when the target vehicle is in a climbing state and the climbing torque is insufficient, the target vehicle is controlled by the vehicle internal control unit to switch from the first mode to the second mode. Compared with the first mode, the second mode can provide a larger torque value to provide greater torque support when the climbing torque of the target vehicle is insufficient, so as to help it to smoothly climb the slope during the uphill process. The climbing state of the target vehicle is determined by a variety of driving parameters. In the process of comparing and determining the actual driving parameters of the target vehicle with the set parameter reference values, the occurrence of misjudgment can be effectively reduced, thereby improving the stability of the entire target vehicle during driving, effectively reducing its energy consumption, and the entire vehicle can synchronously obtain its actual driving parameters during driving, so that the vehicle can automatically complete the automatic switching operation between the first mode and the second mode during driving, thereby improving the smoothness and intelligence of the vehicle during driving, and having a good application prospect. BRIEF DESCRIPTION OF THE DRAWINGS
[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0034] Figure 1 A schematic diagram of a specific control flow of an embodiment of a vehicle control method provided by the present invention;
[0035] Figure 2 for Figure 1 A flowchart of the specific control steps of "determining the climbing state of the target vehicle according to the running state of the target vehicle" in the vehicle control method;
[0036] Figure 3 for Figure 2 The specific judgment process of the vehicle climbing torque judgment condition in the specific flow chart;
[0037] Figure 4 for Figure 1 A partial control flow chart of yet another embodiment of a vehicle control method.
[0038] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0040] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.
[0041] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.
[0042] With the rapid development of the modern automobile industry, the replacement of new energy vehicles is getting faster and faster, and the competition among major automobile manufacturers is becoming more and more fierce. The comfort, practicality and comprehensive endurance of new energy vehicles are also the main considerations when people buy new energy vehicles. The comprehensive endurance of existing new energy vehicles has reached the thousand-kilometer level. With the continuous launch of new models, their endurance is getting stronger and stronger.
[0043] In current drivability calibration, calibrators calibrate the external characteristic parameters of the test vehicle's motor through a hill climbing test to meet the vehicle's climbing torque requirements. Due to different road conditions or for endurance considerations, the external characteristic parameters are often adjusted to prioritize meeting more mileage requirements, so the setting of the energy-saving mode is more inclined during driving. However, in some cases, such as the climbing requirements under some special working conditions, the torque generated by the traditional energy-saving mode is often difficult to meet the actual torque requirements, and the vehicle's driving state may not be able to switch automatically, resulting in difficulty for the vehicle to climb hills.
[0044] The invention provides a vehicle control method.
[0045] See also Figures 1 to 4 In one embodiment of the present invention, the vehicle control method is mainly used to improve the problem of insufficient climbing torque in energy-saving mode, which leads to difficulty in climbing. Today's new energy vehicles, especially household-oriented car models, generally focus on the overall endurance of the vehicle, and their characteristic parameters during driving are often adjusted to give priority to more mileage, so they are more inclined to the setting of energy-saving mode during driving. However, in some cases, such as climbing requirements under some special working conditions, the torque generated by the traditional energy-saving mode is often difficult to meet the actual torque requirements. Taking the above problems into consideration, a vehicle control method is proposed in this embodiment, and the vehicle control method includes the following control steps:
[0046] In the first mode, the operating status of the target vehicle is obtained;
[0047] After the vehicle is started and the self-check is completed, the vehicle is controlled to operate in a first mode. The first mode corresponds to a long-endurance mode, which is more inclined to energy recovery and conservation. In the first mode, relevant parameters of the operating status of the target vehicle during actual operation are obtained in real time.
[0048] Then, judging the climbing state of the target vehicle according to the running state of the target vehicle, wherein the climbing state includes a state of insufficient climbing torque;
[0049] Specifically, during the operation of the target vehicle in the first mode, it is necessary to determine whether the target vehicle is in a climbing state based on relevant data of its operating state, and whether its climbing torque is difficult to meet the actual torque demand in the current climbing state.
[0050] When the target vehicle is in a climbing state where the climbing torque is insufficient, controlling the vehicle to switch from the first mode to the second mode;
[0051] When the target vehicle is in a climbing state and the climbing torque is insufficient, the target vehicle is controlled by an internal control unit of the vehicle to switch from the first mode to the second mode. Compared with the first mode, the second mode can provide a larger torque value to provide greater torque support when the climbing torque of the target vehicle is insufficient, thereby helping it to climb smoothly during the uphill process.
[0052] The above control steps mainly correspond to the control method proposed when the target vehicle is in a climbing state and the climbing torque is insufficient under the condition of energy-saving driving. When the vehicle is driving in an energy-saving scheme, when encountering a steep slope, its actual driving torque is often difficult to meet the torque requirement for climbing. At this time, switching from the first mode to the second mode can allow the target vehicle to burst out a larger torque, thereby achieving the actual climbing torque requirement value, so that the target vehicle can climb the steep slope more smoothly.
[0053] As described above, during the process of the target vehicle being operated, it is necessary to synchronously obtain the actual operating state of the target vehicle, the operating state of the target vehicle includes a plurality of operating parameters, and the plurality of operating parameters include a pedal opening, a first actual speed, an actual torque value, and a battery temperature change rate;
[0054] It is conceivable that, during the driving of the target vehicle in the first mode, the reference parameter for the vehicle to judge that it is in a climbing state is determined by multiple parameters. For example, generally speaking, a car needs a greater power output when climbing a slope, so the opening of the accelerator pedal is also larger, but we can also obtain a higher vehicle driving speed by increasing the opening of the accelerator when the road surface is flat; or, the speed of the vehicle when climbing a slope is relatively small, but when the throttle opening is small, the car can also be driven at a low speed on a flat road. In the above situation, it is impossible to judge that the car is in a climbing state and the climbing torque is insufficient under a single condition. Therefore, the relevant judgment of the car itself on its climbing state also needs to consider its actual driving parameters in multiple aspects simultaneously, generally including the first actual speed and actual torque value of the target vehicle, etc. At the same time, in the relevant actual driving parameters, the battery temperature change rate is simultaneously introduced, and the battery temperature change rate can be used to limit the torque of the over-temperature condition in advance to avoid the situation of excessive battery temperature, thereby protecting the battery safety of the target vehicle.
[0055] Wherein, judging the climbing state of the target vehicle according to the running state of the target vehicle includes:
[0056] When all of the operating parameters satisfy the insufficient climbing torque condition, determining that the climbing state of the target vehicle is in the insufficient climbing torque state;
[0057] The judgment conditions corresponding to insufficient climbing torque of the automobile are stored in the storage system of the target vehicle. As mentioned above, the actual parameters for judging the climbing state of the vehicle are the result of the joint action of multiple actual parameters. Therefore, the multiple operating parameters of the target vehicle during actual driving need to be actually compared with the insufficient climbing torque conditions set inside the automobile. Only when the multiple operating parameters simultaneously meet the insufficient climbing torque conditions can it be further determined that the climbing state of the target vehicle is in the insufficient climbing torque state.
[0058] At the same time, it is conceivable that, correspondingly, when one or some of the operating parameters do not meet the sufficient climbing torque condition, it can be determined that the climbing state of the target vehicle is in the sufficient climbing torque state. At this time, the target vehicle does not need to switch the driving state.
[0059] Correspondingly, all of the operating parameters satisfy the insufficient climbing torque condition, including:
[0060] When the actual pedal opening is greater than the pedal opening reference value, the actual first actual speed is less than the preset speed reference value and the actual torque reaches the preset peak torque reference value, and the actual battery temperature change rate is greater than the preset battery temperature change rate reference value, the climbing torque shortage condition is met;
[0061] As mentioned above, the climbing state of the target vehicle is jointly determined by a plurality of the driving states, wherein a plurality of preset condition values are provided corresponding to the driving parameters in the storage system of the target vehicle. Specifically, for example, the preset reference value of the pedal opening is set to 90 degrees, and the preset reference value of the first speed is set to 3km / h. During the driving of the target vehicle in the first mode, if the actual pedal opening is greater than 90 degrees, the actual first actual speed is between 0 and 3km / h and the actual torque reaches the preset peak torque reference value, and the actual battery temperature change rate of the target vehicle is greater than the preset battery temperature change rate reference value, it can be determined that the target vehicle is in a state of insufficient climbing torque at this time.
[0062] At least one of the operating parameters satisfies the sufficient climbing torque condition, including:
[0063] When the actual pedal opening is less than the pedal opening reference value, or the actual first actual speed is greater than the preset speed reference value and the actual torque is less than the preset peak torque reference value, or the actual battery temperature change rate is less than the preset battery temperature change rate reference value, the climbing torque sufficient condition is met;
[0064] As described above, the climbing state of the target vehicle is determined by a plurality of the driving parameters. It is conceivable that when one or more of the driving parameters do not meet the preset reference conditions, it indicates that the vehicle may be in other driving states, such as a low-speed driving state or an accelerated driving state on a horizontal road. Therefore, when one of the driving parameters does not meet the above-mentioned insufficient climbing torque condition, the target vehicle is judged to be in a sufficient slope torque state. At this time, it is determined that the target vehicle can climb smoothly in the first mode.
[0065] It is conceivable that after the target vehicle switches from the first mode to the second mode, in order to meet its energy-saving requirements for long driving range, it needs to switch from the second mode to the first mode to drive. At this time, the target vehicle needs to determine its driving state based on its actual driving data, and when the switching conditions are met, it will switch autonomously. Specifically, after the vehicle is controlled to switch from the first mode to the second mode, it includes:
[0066] Acquire a second actual speed and an actual torque of the target vehicle in the second mode;
[0067] The target vehicle travels in the second mode. During the driving process, the second actual speed and the actual torque in the real-time state are synchronously obtained. The second actual speed and the actual torque are compared with the preset condition parameters to determine whether to switch from the second mode to the first mode.
[0068] When the second actual speed is greater than the preset speed reference value and the actual torque decreases linearly, controlling the vehicle to switch from the second mode to the first mode;
[0069] Specifically, when the second actual speed is greater than the preset speed reference value, that is, greater than 3km / h, and at the same time the actual torque of the target vehicle decreases linearly, it can be judged that the target vehicle is driving on a small slope or a relatively flat road. At this time, its actual driving state can enter the first mode to meet the relevant requirements of energy saving.
[0070] Through the above control method, the target vehicle can automatically switch back to the first mode when the above switching conditions are met, thereby reducing the energy consumption of the target vehicle during driving as much as possible.
[0071] Wherein, controlling the vehicle to switch from the first mode to the second mode includes:
[0072] In the second mode, controlling the driving motor in the vehicle to output torque at a preset peak torque reference value;
[0073] When the target vehicle is in a state of insufficient climbing torque, the target vehicle enters the second mode in the manner described. The second mode mainly controls the VCM drive motor to enter a special external characteristic of increased torque, controls the motor torque to increase within a preset torque range, thereby meeting the torque requirement in the climbing state, and enabling the vehicle to climb more smoothly.
[0074] The first mode includes an energy-saving mode of the vehicle. In the current mode, the target vehicle can recover more energy while reducing the output of energy as much as possible while meeting normal driving needs. The second mode includes a performance mode of the vehicle. In the current mode, the target vehicle can output greater torque, thereby providing better power output.
[0075] The present invention also proposes a vehicle control device, which includes a processor, in which a corresponding execution program is provided, and the execution program can execute a vehicle control method. The specific control steps of the vehicle control method refer to the above-mentioned embodiments. Since the vehicle control device adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.
[0076] The present invention also proposes a car, which includes a vehicle control method. The specific control steps of the vehicle control method refer to the above-mentioned embodiments. Since the car adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.
[0077] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.
Claims
1. A vehicle control method, characterized in that: The following steps are involved: In the first mode, the operating status of the target vehicle is obtained; According to the running state of the target vehicle, determining the climbing state of the target vehicle, wherein the climbing state includes a state of insufficient climbing torque; When the target vehicle is in a climbing state where the climbing torque is insufficient, the vehicle is controlled to switch from the first mode to the second mode.
2. The vehicle control method according to claim 1, characterized in that: The operating state of the target vehicle includes a plurality of operating parameters, and the plurality of operating parameters include a pedal opening, a first actual speed, an actual torque value, and a battery temperature change rate.
3. The vehicle control method according to claim 2, characterized in that: The step of determining the climbing state of the target vehicle according to the running state of the target vehicle includes: When all of the operating parameters satisfy the insufficient climbing torque condition, determining that the climbing state of the target vehicle is in the insufficient climbing torque state; When at least one of the operating parameters satisfies a sufficient climbing torque condition, it is determined that the climbing state of the target vehicle is in a sufficient climbing torque state.
4. The vehicle control method according to claim 3, characterized in that: All of the operating parameters satisfy the insufficient climbing torque condition, including: When the actual pedal opening is greater than the pedal opening reference value, the actual first actual speed is less than the preset speed reference value and the actual torque reaches the preset peak torque reference value, and the actual battery temperature change rate is greater than the preset battery temperature change rate reference value, the climbing torque deficiency condition is met.
5. The vehicle control method according to claim 3, characterized in that: At least one of the operating parameters satisfies the sufficient climbing torque condition, including: When the actual pedal opening is less than the pedal opening reference value, or the actual first actual speed is greater than the preset speed reference value and the actual torque is less than the preset peak torque reference value, or the actual battery temperature change rate is less than the battery temperature change rate reference value, the climbing torque sufficient condition is met.
6. The vehicle control method according to claim 4, characterized in that: After controlling the vehicle to switch from the first mode to the second mode, the method includes: Acquire a second actual speed and an actual torque of the target vehicle in the second mode; When the second actual speed is greater than the preset speed reference value and the actual torque decreases linearly, the vehicle is controlled to switch from the second mode to the first mode.
7. The vehicle control method according to claim 1, characterized in that: Controlling the vehicle to switch from the first mode to the second mode includes: In the second mode, the driving motor in the vehicle is controlled to output torque at a preset peak torque reference value.
8. The vehicle control method according to claim 1, characterized in that: The first mode comprises an energy-saving mode of the vehicle; and / or, The second mode comprises a performance mode of the vehicle.
9. A vehicle control device, characterized in that: The vehicle control device includes a processor, and the processor includes an execution program capable of executing the steps of the vehicle control method according to any one of claims 1 to 8.
10. An automobile, characterized in that: Comprising the vehicle control device as claimed in claim 9.