Vehicle speed display method, vehicle speed display system, and vehicle

Abstract

The present invention discloses a vehicle speed display method, a vehicle speed display system, and a vehicle. The vehicle speed display method includes: obtaining a cruising speed value; obtaining an actual vehicle speed value, and obtaining a calculated instrument speed value based on the actual vehicle speed value; determining whether there is a jump between the calculated instrument speed value and the cruising speed value; performing a negative feedback operation based on the calculated instrument speed value and the cruising speed value until there is no jump between the calculated instrument speed value and the cruising speed value, and using the final calculated instrument speed value as a target calculated instrument speed value; and displaying the vehicle speed based on the target calculated instrument speed value. When there is a jump in the speed value displayed on the combination instrument, the method recalculates the calculated instrument speed value through a negative feedback operation to ensure that the speed value displayed on the instrument is consistent with the cruising speed value, thereby avoiding the problem of jumps in the speed value displayed on the instrument.

Description

Technical Field

[0001] The present invention relates to the field of vehicle technology, and in particular to a vehicle speed display method, a vehicle speed display system and a vehicle Background Art

[0002] In cruise mode, the vehicle can automatically maintain its speed without the driver having to operate the accelerator pedal, so that the vehicle travels at a fixed cruising speed.

[0003] In this mode, the vehicle's instrument will display the cruise speed value and the actual speed value, but the actual speed value here is actually the instrument display speed value obtained by converting the actual speed value through a set of conversion algorithms. In fact, according to relevant vehicle regulations, the instrument display speed value should be higher than the actual speed value to prevent the driver from speeding.

[0004] Ideally, in cruise mode, the speed displayed on the instrument panel should be consistent with the cruising speed. However, due to flaws in the algorithm used to convert actual vehicle speed to the speed displayed on the instrument panel, the speed displayed on the instrument panel can deviate from the cruising speed, resulting in jumps between the two. Alternatively, when entering or exiting cruise mode, there can be jumps between the speed displayed on the instrument panel and the cruising speed, which can easily lead to user complaints and reduce the cruise mode experience. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a vehicle speed display method that, when the vehicle speed value displayed on the instrument panel jumps, recalculates the calculated vehicle speed value displayed on the instrument panel through a negative feedback operation to ensure that the vehicle speed value displayed on the instrument panel is consistent with the cruising speed value, thereby avoiding the problem of vehicle speed jumps on the instrument panel.

[0006] A second object of the present invention is to provide a vehicle speed display system.

[0007] A third object of the present invention is to provide a vehicle.

[0008] In order to solve the above problems, the first aspect of the present invention provides a vehicle speed display method, including: obtaining a cruising speed; obtaining an actual vehicle speed value, and obtaining an instrument display speed calculation value based on the actual vehicle speed value; determining whether there is a jump value between the instrument display speed calculation value and the cruising speed value; performing a negative feedback operation based on the instrument display speed calculation value and the cruising speed value until there is no jump value between the instrument display speed calculation value and the cruising speed value, and using the final instrument display speed calculation value as the target instrument display speed calculation value; and displaying the vehicle speed based on the target instrument display speed calculation value.

[0009] According to the vehicle speed display method of an embodiment of the present invention, when it is determined that there is a jump between the calculated vehicle speed value displayed on the instrument and the cruise speed value, the calculated vehicle speed value displayed on the instrument is recalculated through negative feedback, thereby reducing the error between the vehicle speed value displayed on the instrument and the cruise speed value, ensuring that the calculated vehicle speed value displayed on the instrument is consistent with the cruise speed value, avoiding the problem of value jumps on the combination instrument, and improving the cruise mode application experience.

[0010] In some embodiments, a negative feedback operation is performed based on the instrument display speed calculation value and the cruise speed value until there is no jump between the instrument display speed calculation value and the cruise speed value, and the final instrument display speed calculation value is used as the target instrument display speed calculation value, including: a first calculation step of calculating the speed difference between the instrument display speed calculation value and the cruise speed value; a second calculation step of adjusting the current driving torque value according to the speed difference to obtain a new actual speed value; a third calculation step of obtaining a new instrument display speed calculation value according to the new actual speed value; determining that there is no jump between the new instrument display speed calculation value and the cruise speed value, and using the new instrument display speed calculation value as the target instrument display speed calculation value.

[0011] In some embodiments, the second calculation step, adjusting the driving torque value according to the vehicle speed difference and obtaining a new actual vehicle speed value, includes: performing a PID operation on the current driving torque value according to the vehicle speed difference, and obtaining the new actual vehicle speed value according to the PID operation result value.

[0012] In some embodiments, it also includes: determining that there is still a jump between the new instrument display speed calculation value and the cruising speed value, using the new instrument display speed calculation value as a feedback value, repeating the first calculation step, the second calculation step and the third calculation step; looping in sequence until there is no jump between the new instrument display speed calculation value and the cruising speed value, and using the final new instrument display speed calculation value as the target instrument display speed calculation value.

[0013] In some embodiments, determining whether there is a jump between the calculated speed value displayed on the instrument and the cruise speed value includes: rounding the cruise speed value to obtain a first rounded speed value, and rounding the calculated speed value displayed on the instrument to obtain a second rounded speed value; if the first rounded speed value is equal to the second rounded speed value, then determining that there is no jump between the calculated speed value displayed on the instrument and the cruise speed value; if the first rounded speed value is not equal to the second rounded speed value, then determining that there is a jump between the calculated speed value displayed on the instrument and the cruise speed value.

[0014] A second aspect of the present invention provides a vehicle speed display system, comprising: an electronic control unit and an instrument cluster; wherein the electronic control unit is used to obtain a cruising speed and an actual vehicle speed value, obtain an instrument display speed calculation value based on the actual vehicle speed value, and when there is a jump between the instrument display speed calculation value and the cruising speed value, perform a negative feedback operation based on the instrument display speed calculation value and the cruising speed value until there is no jump between the instrument display speed calculation value and the cruising speed value, and use the final instrument display speed calculation value as a target instrument display speed calculation value; the instrument cluster is used to display the vehicle speed based on the target instrument display speed calculation value.

[0015] According to the vehicle speed display system of an embodiment of the present invention, when the electronic control unit determines that there is a jump between the calculated value of the vehicle speed displayed on the instrument and the cruise speed value, the calculated value of the vehicle speed displayed on the instrument is recalculated through negative feedback, thereby reducing the error between the calculated value of the vehicle speed displayed on the instrument and the cruise speed value, ensuring that the vehicle speed value displayed on the instrument combination is consistent with the cruise speed value, thereby avoiding the problem of jumps in the displayed speed value and improving the user experience of the cruise mode.

[0016] In some embodiments, the electronic control unit includes: a first calculation subunit, used to calculate the speed difference between the instrument display vehicle speed calculation value and the cruise speed value; a second calculation subunit, used to adjust the current driving torque value according to the speed difference to obtain a new actual vehicle speed value; a third calculation subunit, used to obtain a new instrument display vehicle speed calculation value according to the new actual vehicle speed value; and a comparison subunit, used to set the new instrument display vehicle speed calculation value as the target instrument display vehicle speed calculation value when there is no jump value between the new instrument display vehicle speed calculation value and the cruise speed value.

[0017] In some embodiments, the second calculation subunit is a PID subunit, which is used to perform PID calculation on the current driving torque value according to the vehicle speed difference, and obtain the new actual vehicle speed value according to the PID calculation result value.

[0018] In some embodiments, the comparison subunit is also used to feed back the new instrument display speed calculation value to the first calculation subunit when it is determined that there is still a jump between the new instrument display speed calculation value and the cruise speed value, and the first calculation subunit, the second calculation subunit and the third calculation subunit perform operations, and cycle in sequence until the comparison subunit determines that there is no jump between the new instrument display speed calculation value and the cruise speed value, and uses the final new instrument display speed calculation value as the target instrument display speed calculation value.

[0019] A third embodiment of the present invention provides a vehicle, comprising the vehicle speed display system described in the above embodiment.

[0020] According to the vehicle of the embodiment of the present invention, by adopting the vehicle speed display system provided by the above embodiment, the problem of jumping values ​​of the vehicle speed value displayed on the combination instrument can be avoided.

[0021] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0023] Figure 1 is a flow chart of a vehicle speed display method according to one embodiment of the present invention;

[0024] Figure 2 is a flow chart of a vehicle speed display method according to another embodiment of the present invention;

[0025] Figure 3 is a structural block diagram of a vehicle speed display system according to one embodiment of the present invention;

[0026] Figure 4 is a structural block diagram of a vehicle according to an embodiment of the present invention.

[0027] Figure 5 is a structural block diagram of a vehicle according to an embodiment of the present invention. DETAILED DESCRIPTION

[0028] The embodiments of the present invention will be described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention will be described in detail below.

[0029] In order to solve the above problems, an embodiment of the first aspect of the present invention provides a vehicle speed display method. When the vehicle speed value displayed on the instrument jumps, the method recalculates the vehicle speed calculated value displayed on the instrument through negative feedback operation to make the vehicle speed value displayed on the instrument consistent with the cruising speed value, thereby avoiding the problem of vehicle speed jumping displayed on the instrument.

[0030] Reference below Figure 1 The vehicle speed display method provided by the embodiment of the present invention is described as follows. Figure 1 As shown, the method at least includes steps S1 to S5.

[0031] Step S1, obtaining the cruising speed.

[0032] Specifically, the user can start the cruise mode through the vehicle's central control and set the cruise speed. The vehicle's electronic control unit obtains the set cruise speed and displays the cruise speed through the vehicle's instrument.

[0033] Step S2: Acquire the actual vehicle speed value, and obtain the calculated value of the vehicle speed displayed on the instrument according to the actual vehicle speed value.

[0034] The actual vehicle speed value is the vehicle speed during use.

[0035] In an embodiment, the actual speed value of the vehicle may be monitored in real time by a vehicle speed sensor, and the monitored data may be sent to an electronic control unit of the vehicle.

[0036] The calculated vehicle speed value displayed on the instrument is a vehicle speed value obtained through an algorithm and is used to be displayed on the vehicle combination instrument.

[0037] In this embodiment, according to national automobile speedometer regulations, the speed displayed on the instrument panel cannot be lower than the actual vehicle speed. Therefore, a specific program is pre-set in the electronic control unit. After receiving the signal output by the vehicle speed sensor, the electronic control unit performs an algorithm calculation based on the actual vehicle speed according to the specific program to obtain the calculated vehicle speed displayed on the instrument panel.

[0038] Step S3: Determine whether there is a jump between the calculated vehicle speed value displayed on the instrument and the cruising speed value.

[0039] In this embodiment, the speed displayed on the instrument cluster after processing by a preset algorithm within the electronic control unit should be consistent with the cruise speed value. However, due to issues with the algorithm, the speed displayed on the instrument cluster may be inconsistent with the actual vehicle speed value, i.e., the speed displayed on the instrument cluster may experience a jump. Therefore, when a jump is determined between the calculated speed displayed on the instrument cluster and the cruise speed value, this embodiment of the present invention does not directly display the calculated speed on the instrument cluster. Instead, the final speed value displayed on the instrument cluster is determined through the following steps S4 and S5, thereby avoiding the problem of speed jumps on the instrument cluster display.

[0040] Specifically, if the calculated value of the vehicle speed displayed on the instrument after algorithm processing, such as rounding operation, is equal to the cruise speed value, or the difference between the two is within the tolerance range, for example, the difference is less than a preset threshold, then it is determined that there is no jump between the calculated value of the vehicle speed displayed on the instrument and the cruise speed value; conversely, if the calculated value of the vehicle speed displayed on the instrument after algorithm processing is not equal to the cruise speed value, or the difference between the two is not within the tolerance range, for example, the difference is greater than the preset threshold, then it is determined that there is a jump between the calculated value of the vehicle speed displayed on the instrument and the cruise speed value.

[0041] For example, taking the preset threshold value of 0.9 as an example, if the cruise speed value is 50, the instrument displays the calculated speed value of 50.4, and the difference between the cruise speed value and the instrument displays the calculated speed value is 0.4, which is less than the preset threshold value. The actual display is 50, thereby determining that there is no jump between the instrument displays the calculated speed value and the cruise speed value; if the cruise speed value is 50, the instrument displays the calculated speed value of 51, and the difference between the cruise speed value and the instrument displays the calculated speed value is 1, which is greater than the preset threshold value, thereby determining that there is a jump between the instrument displays the calculated speed value and the cruise speed value, which means that the speed value displayed on the instrument cluster has jumped. In this case, the instrument cluster will not directly display the instrument displays the calculated speed value to avoid misleading the user.

[0042] Step S4, performing negative feedback operation based on the instrument display speed calculation value and the cruising speed value until there is no jump between the instrument display speed calculation value and the cruising speed value, and taking the final instrument display speed calculation value as the target instrument display speed calculation value.

[0043] The target instrument display vehicle speed calculation value may be understood as the vehicle speed value ultimately displayed to the user on the vehicle's combined instrument panel.

[0044] In an embodiment, after determining that the vehicle speed displayed on the instrument cluster has jumped, the calculated value of the vehicle speed displayed on the instrument is recalculated in the form of negative feedback, that is, the calculated value of the vehicle speed displayed on the instrument cluster and the circulating vehicle speed value are used as input values ​​to perform a negative feedback operation, so as to adjust the error between the calculated value of the vehicle speed displayed on the instrument cluster and the cruise speed value, gradually making the calculated value of the vehicle speed displayed on the instrument cluster close to the cruise speed value, so that the vehicle speed value displayed on the instrument cluster and the cruise speed value are consistent, that is, obtaining the target calculated value of the vehicle speed displayed on the instrument cluster, thereby avoiding the problem of the vehicle speed displayed on the instrument cluster jumping.

[0045] Specifically, the calculated value of the instrument display speed and the cruise speed value are used as input values ​​of negative feedback, so that the error between the calculated value of the instrument display speed and the cruise speed value output after each negative feedback operation gradually decreases, until the calculated value of the instrument display speed received on the instrument combination is consistent with the cruise speed value or the difference is within the tolerance range. There will be no jump between the speed value corresponding to the actual speed displayed on the instrument combination and the cruise speed, and the calculated value of the instrument display speed output this time is used as the final target calculated value of the instrument display speed.

[0046] Step S5: displaying the vehicle speed based on the target instrument display vehicle speed calculation value.

[0047] In an embodiment, the electronic control unit transmits the obtained target instrument display speed calculation value to the instrument cluster, and the instrument cluster can display the target instrument display speed calculation value and the cruising speed value at corresponding positions in the form of numbers or pointers, and the displayed values ​​of the two are the same.

[0048] According to the vehicle speed display method of an embodiment of the present invention, when it is determined that there is a jump between the calculated vehicle speed value displayed on the instrument and the cruising speed value, the vehicle speed will not be directly displayed based on the current calculated vehicle speed value displayed on the instrument. Instead, the calculated vehicle speed value displayed on the instrument is recalculated through negative feedback, thereby reducing the error between the calculated vehicle speed value displayed on the instrument and the cruising speed value, ensuring that there is no jump between the vehicle speed value displayed on the instrument and the cruising speed value, and improving the user experience of the cruise mode.

[0049] In some embodiments, the process of performing negative feedback calculation may include the following steps: a first calculation step of calculating the speed difference, e.g., ΔV, between the calculated instrument speed value (e.g., Vd) and the cruising speed value (e.g., V0); a second calculation step of adjusting the current driving torque value based on the speed difference ΔV to obtain a new actual vehicle speed value (e.g., Va); and a third calculation step of obtaining a new instrument speed value based on the new actual vehicle speed value Va. If there is no jump between the new instrument speed value and the cruising speed value, the new instrument speed value is used as the target instrument speed value, and the vehicle speed is displayed on the instrument cluster based on the target instrument speed value. On the contrary, if it is determined that there is still a jump between the calculated value of the vehicle speed displayed on the instrument and the cruising speed value, the new calculated value of the vehicle speed displayed on the instrument Vd is used as the feedback value, and the difference between the calculated value of the vehicle speed displayed on the instrument and the cruising speed value is adjusted through the above negative feedback method, so that there is no jump between the speed value displayed on the final combination instrument, that is, the target calculated value of the vehicle speed displayed on the instrument and the cruising speed value, so as to avoid the problem of jump in the speed value displayed on the combination instrument.

[0050] In some embodiments, a PID (Proportion-Integral-Differential) algorithm can be performed on the current driving torque value based on the vehicle speed difference ΔV. A new actual vehicle speed value Va is obtained based on the PID calculation result, for example, denoted as T. A new instrument display speed calculated value is then obtained based on the actual vehicle speed value. In some embodiments, if there is a jump between the new instrument display speed calculated value and the cruising speed value V0, the new instrument display speed calculated value is used again as a feedback value, i.e., an input value for a negative feedback operation. The first, second, and third calculation steps are repeated in a loop until there is no jump between the new instrument display speed calculated value and the cycle speed value. The final new instrument display speed calculated value is then used as the target instrument display speed calculated value for display on the instrument cluster. That is to say, during the negative feedback operation, if there is a jump between the instrument display speed calculation value received by the instrument cluster and the cruise speed value, the instrument display speed calculation value Vd and the cruise speed value V0 after each negative feedback operation will be cyclically used as the input values ​​of the negative feedback operation to gradually reduce the error until the speed value displayed on the final instrument cluster, that is, the target instrument display speed calculation value, is consistent with the cruise speed value, thereby solving the problem of jumps in the speed value displayed on the instrument cluster.

[0051] PID operation is a closed-loop control method. When the calculated speed displayed on the instrument panel deviates from the cruising speed, it corrects the deviation according to a fixed or standard value. By combining proportional, integral, and differential algorithms, PID operation effectively corrects deviations in the calculated speed displayed on the instrument panel, ensuring no jumps between the calculated speed displayed on the instrument panel and the cruising speed.

[0052] Specifically, the proportional operation in the PID algorithm proportionally reflects the control system's deviation signal. Any deviation between the instrument speed calculated value and the cruise speed is immediately damped to reduce the deviation. The proportional operation's output is proportional to the input deviation, quickly reflecting the deviation and thus reducing it, but it cannot eliminate static error. The integral operation in the PID algorithm, on the other hand, primarily eliminates static error and improves the system's accuracy. The existence of the integral control effect is dependent on the duration of the deviation. As long as there is a jump between the instrument speed calculated value and the cruise speed value, the integral component remains in effect, integrating the speed difference between the instrument speed calculated value and the cruise speed value, causing the output opening to continuously change, creating a damping effect to reduce the speed difference between the two. The differential operation in the PID algorithm reflects the changing trend of the speed difference and can introduce an effective early correction signal into the system before the speed difference becomes too large, thereby accelerating the system's action and reducing adjustment time. Therefore, through PID calculation, the deviation between the calculated vehicle speed displayed on the instrument and the cruising speed can be within the tolerance range, so that the two speed values ​​displayed by the instrument cluster can be consistent, that is, there is no jump between the two, thereby improving the user experience of the cruise mode.

[0053] For example, Figure 2 FIG2 is a schematic diagram of the negative feedback operation process, wherein, when it is determined that there is a jump between the calculated speed value Vd displayed on the instrument and the cruising speed value V0, the calculated speed value Vd displayed on the instrument and the cruising speed value V0 are used as input values ​​of the negative feedback operation, and the speed difference ΔV between the calculated speed value Vd displayed on the instrument and the cruising speed value V0 is calculated. Then, based on the PID control algorithm, the driving torque value of the engine or motor is PID-adjusted according to the speed difference ΔV, so as to obtain a new actual vehicle speed value Va with the adjusted driving torque value T, and the new actual vehicle speed value Va is converted by the algorithm to obtain The new instrument display speed calculated value is used. If there are no jumps between the new instrument display speed calculated value and the cycle speed value V0, this indicates that there are no jumps after this negative feedback operation, and the new instrument display speed calculated value is the target instrument display speed calculated value. If the new instrument display speed calculated value is inconsistent with the cruise speed value V0, this indicates that there is still a jump after this negative feedback operation. The new instrument display speed calculated value is used as feedback and returned to the input of the negative feedback operation. It is compared with the cruise speed value to perform negative feedback calculation on the new instrument display speed calculated value again. Thus, through the negative feedback operation, the instrument display speed calculated value is recalculated based on the feedback information each time, ensuring that there are no jumps between the speed value displayed on the instrument cluster and the cruise speed value, avoiding the jump problem that affects the cruise mode user experience.

[0054] In some embodiments, referring to the principle of displaying vehicle speed on the combination instrument, the cruise speed value is rounded to obtain a first rounded speed value, and the instrument display speed calculation value is rounded to obtain a second rounded speed value; if the first rounded speed value is equal to the second rounded speed value, it is determined that there is no jump between the instrument display speed calculation value and the cruise speed value; if the first rounded speed value is not equal to the second rounded speed value, it is determined that there is a jump between the instrument display speed calculation value and the cruise speed value, and then negative feedback is performed on the instrument display speed calculation value with reference to the above embodiment to solve the jump problem.

[0055] Among them, rounding operations include discarding decimals, rounding or rounding up. Taking discarding decimals as an example, if the cruising speed value is 50.1 and the instrument display speed calculation value is 50.8, then after the rounding operation, the first rounded speed value is 50 and the second rounded speed value is 50, that is, the first rounded speed value is equal to the second rounded speed value, thereby determining that the instrument display speed calculation value is consistent with the cruising speed value. In this case, the instrument combination will display the instrument display speed calculation value and the cruising speed value accordingly; if the actual speed value is 50.5 and the instrument display speed calculation value is 51.2, then after the rounding operation, After the rounding operation, the first rounded speed value is 50, and the second rounded speed value is 51, that is, the first rounded speed value and the second rounded speed value are not equal, thereby determining that there is a jump value between the calculated speed value displayed on the instrument and the cruising speed value. In this case, the instrument cluster does not directly display the calculated speed value on the instrument, but solves the jump value problem through negative feedback operation. When the first rounded speed value and the second rounded speed value are equal, the instrument cluster displays the speed according to the current calculated speed value displayed on the instrument, thereby avoiding the jump value problem.

[0056] Please refer to the following Figure 3 The vehicle speed display method according to an embodiment of the present invention is described with an example, and the specific steps are as follows.

[0057] Step S7: Obtain the actual vehicle speed value.

[0058] Step S8: Send the actual vehicle speed value to the instrument cluster.

[0059] In step S9, the combination meter obtains a calculated value of the vehicle speed displayed on the instrument based on the actual vehicle speed value through algorithm calculation.

[0060] Step S10: Determine whether there is a jump value based on the instrument display speed calculation value and the cruising speed value. If yes, proceed to step S11; if not, the instrument combination displays the current instrument display speed calculation value.

[0061] In step S11, a negative feedback operation is performed using the calculated vehicle speed value displayed on the instrument and the cruising speed value as inputs.

[0062] Therefore, according to the vehicle speed display method of an embodiment of the present invention, when the vehicle speed value displayed on the instrument cluster jumps, for example, when the vehicle speed displayed on the instrument cluster jumps at the moment of entering and exiting cruise control, the above steps can be used to adjust the deviation between the calculated vehicle speed value displayed on the instrument cluster and the cruise speed value in the form of negative feedback, ensuring that the cruise speed value is consistent with the vehicle speed value displayed on the instrument cluster, thereby effectively avoiding the problem of jumping values.

[0063] In addition, when the vehicle is in cruise control, the cruise speed value and the calculated speed value displayed on the instrument are used as input values ​​for the negative feedback operation, and the driving torque of the engine / motor is adjusted through the PID control algorithm to control the actual speed of the entire vehicle, thereby solving the problem of inconsistency between the cruise speed value and the actual speed value.

[0064] A second embodiment of the present invention provides a vehicle speed display system, such as Figure 4 As shown, the vehicle speed display system 10 includes an electronic control unit 1 and a combination meter 2 .

[0065] Among them, the electronic control unit 1 is used to obtain the cruising speed and the actual vehicle speed value, obtain the instrument display speed calculation value based on the actual vehicle speed value, and when there is a jump value between the instrument display speed calculation value and the cruising speed value, perform negative feedback operation based on the instrument display speed calculation value and the cruising speed value until there is no jump value between the instrument display speed calculation value and the cruising speed value, and use the final instrument display speed calculation value as the target instrument display speed calculation value; the combination instrument 2 is used to display the vehicle speed according to the target instrument display speed calculation value.

[0066] It should be noted that the specific implementation method of the vehicle speed display system 10 in the embodiment of the present invention is similar to the specific implementation method of the vehicle speed display method in any of the above-mentioned embodiments of the present invention. For details, please refer to the description of the method part. In order to reduce redundancy, it will not be repeated here.

[0067] According to the vehicle speed display system 10 of an embodiment of the present invention, when the electronic control unit 1 determines that there is a jump between the calculated value of the vehicle speed displayed on the instrument and the cruise speed value, the calculated value of the vehicle speed displayed on the instrument is recalculated through negative feedback, thereby reducing the error between the calculated value of the vehicle speed displayed on the instrument and the cruise speed value, ensuring that the vehicle speed value displayed on the instrument combination 2 is consistent with the cruise speed value, thereby avoiding the problem of jumps in the displayed speed value and improving the user experience of the cruise mode.

[0068] In some embodiments, as Figure 3 As shown, the electronic control unit 1 includes a first calculation subunit 11 , a second calculation subunit 12 , a third calculation subunit 13 and a comparison subunit 14 .

[0069] Among them, the first calculation subunit 11 is used to calculate the speed difference between the instrument display vehicle speed calculated value and the cruising speed value; the second calculation subunit 12 is used to adjust the current driving torque value according to the speed difference to obtain a new actual vehicle speed value; the third calculation subunit 13 is used to obtain a new instrument display vehicle speed calculated value according to the new actual vehicle speed value; the comparison subunit 14 is used to use the new instrument display vehicle speed calculated value as the target instrument display vehicle speed calculated value when there is no jump value between the new instrument display vehicle speed calculated value and the cruising speed value.

[0070] In some embodiments, the second calculation subunit 12 is a PID subunit, which is used to perform PID calculation on the current driving torque value according to the vehicle speed difference, and obtain a new actual vehicle speed value according to the PID calculation result.

[0071] In some embodiments, when the comparison subunit 14 is also used to determine that there is still a jump between the new instrument display vehicle speed calculated value and the cruise speed value, the new instrument display vehicle speed calculated value is fed back to the first calculation subunit 11, and the first calculation subunit 11, the second calculation subunit 12 and the third calculation subunit 13 perform operations, and the cycle is repeated in sequence until the comparison subunit 14 determines that there is no jump between the new instrument display vehicle speed calculated value and the cruise speed value, and the final new instrument display vehicle speed calculated value is used as the target instrument display vehicle speed calculated value.

[0072] A third aspect of the present invention provides a vehicle, such as Figure 5 As shown, the vehicle 20 includes the vehicle speed display system 10 provided by the above embodiment.

[0073] According to the vehicle 20 of the embodiment of the present invention, by adopting the vehicle speed display system 10 provided by the above embodiment, the problem of the vehicle speed value displayed on the combination meter jumping can be avoided.

[0074] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0075] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A vehicle speed display method, characterized in that: include: Get the cruise speed value; Acquiring an actual vehicle speed value, and obtaining a calculated value of the vehicle speed displayed on an instrument based on the actual vehicle speed value; Determining that there is a jump between the calculated vehicle speed value displayed on the instrument and the cruising speed value; performing a negative feedback operation based on the calculated value of the vehicle speed displayed on the instrument and the cruising speed value until there is no jump between the calculated value of the vehicle speed displayed on the instrument and the cruising speed value, and using the final calculated value of the vehicle speed displayed on the instrument as the target calculated value of the vehicle speed displayed on the instrument; Displaying the vehicle speed according to the target instrument display vehicle speed calculation value; The negative feedback operation is performed based on the calculated value of the vehicle speed displayed on the instrument and the cruise speed value until there is no jump between the calculated value of the vehicle speed displayed on the instrument and the cruise speed value, and the final calculated value of the vehicle speed displayed on the instrument is used as the target calculated value of the vehicle speed displayed on the instrument, including: The first calculation step is to calculate the speed difference between the calculated vehicle speed value displayed on the instrument and the cruising speed value; A second calculation step is to adjust the current driving torque value according to the vehicle speed difference to obtain a new actual vehicle speed value; A third calculation step is to obtain a new calculated value of the vehicle speed displayed on the instrument according to the new actual vehicle speed value; Determining that there is no jump between the new calculated value of the vehicle speed displayed on the instrument and the cruising speed value, and using the new calculated value of the vehicle speed displayed on the instrument as the target calculated value of the vehicle speed displayed on the instrument; The second calculation step, adjusting the driving torque value according to the vehicle speed difference and obtaining a new actual vehicle speed value, includes: A PID operation is performed on the current driving torque value according to the vehicle speed difference, and the new actual vehicle speed value is obtained according to the PID operation result.

2. The vehicle speed display method according to claim 1, characterized in that: Also includes: Determining that there is still a jump between the new calculated value of the vehicle speed displayed on the instrument and the cruising speed value, using the new calculated value of the vehicle speed displayed on the instrument as a feedback value, and repeating the first calculating step, the second calculating step, and the third calculating step; The process is repeated until there is no jump between the new calculated value of the vehicle speed displayed on the instrument and the cruising speed value, and the final new calculated value of the vehicle speed displayed on the instrument is used as the target calculated value of the vehicle speed displayed on the instrument.

3. The vehicle speed display method according to claim 1, characterized in that: The determining that there is a jump between the calculated vehicle speed value displayed on the instrument and the cruising speed value includes: performing a rounding operation on the cruising speed value to obtain a first rounded speed value, and performing a rounding operation on the calculated speed value displayed on the instrument to obtain a second rounded speed value; If the first rounded vehicle speed value is equal to the second rounded vehicle speed value, it is determined that there is no jump between the calculated vehicle speed value displayed on the instrument and the cruising speed value; If the first rounded vehicle speed value is not equal to the second rounded vehicle speed value, it is determined that there is a jump between the calculated vehicle speed value displayed on the instrument and the cruising speed value.

4. A vehicle speed display system, characterized in that: include: Electronic control units and instrument clusters; wherein the electronic control unit is configured to obtain a cruising speed value and an actual speed value, obtain a calculated instrument display speed value based on the actual speed value, and, when a jump occurs between the calculated instrument display speed value and the cruising speed value, perform a negative feedback operation based on the calculated instrument display speed value and the cruising speed value until no jump occurs between the calculated instrument display speed value and the cruising speed value, and use the final calculated instrument display speed value as the target calculated instrument display speed value; The combination instrument is used to display the vehicle speed based on the calculated vehicle speed value displayed by the target instrument; The electronic control unit comprises: a first calculation subunit, configured to calculate a speed difference between the calculated vehicle speed value displayed on the instrument and the cruising speed value; a second calculation subunit, configured to adjust the current driving torque value according to the vehicle speed difference to obtain a new actual vehicle speed value; a third calculation subunit, configured to obtain a new calculated value of the vehicle speed displayed on the instrument according to the new actual vehicle speed value; a comparing subunit, configured to use the new calculated value of the vehicle speed displayed on the instrument as the target calculated value of the vehicle speed displayed on the instrument when there is no jump between the new calculated value of the vehicle speed displayed on the instrument and the cruising speed value; The second calculation subunit is a PID subunit, which is used to perform PID calculation on the current driving torque value according to the vehicle speed difference, and obtain the new actual vehicle speed value according to the PID calculation result.

5. The vehicle speed display system according to claim 4, characterized in that: The comparison subunit is further configured to, when determining that there is still a jump between the new calculated value of the vehicle speed displayed on the instrument and the cruising speed value, feed back the new calculated value of the vehicle speed displayed on the instrument to the first calculation subunit, and the first calculation subunit, the second calculation subunit, and the third calculation subunit perform operations in a cycle until the comparison subunit determines that there is no jump between the new calculated value of the vehicle speed displayed on the instrument and the cruising speed value, and use the final new calculated value of the vehicle speed displayed on the instrument as the target calculated value of the vehicle speed displayed on the instrument.

6. A vehicle, characterized in that: A vehicle speed display system comprising the vehicle speed display system according to any one of claims 4 or 5.

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