Vehicle driving performance adjustment method and device, computer device and storage medium

Abstract

The application relates to a vehicle driving performance adjustment method and device, computer equipment and a storage medium. The method comprises the following steps: acquiring multiple engine speeds in the engine working speed range of a vehicle, and acquiring multiple groups of test data collected at the multiple engine speeds under the vehicle use state, wherein each group of test data comprises vehicle driving power and mechanical system friction power collected at multiple throttle opening degrees; drawing a vehicle speed regulation characteristic curve according to the test data corresponding to each engine speed; and adjusting the vehicle driving performance according to the drawn vehicle speed regulation characteristic curve. The method can acquire the change relationship between the vehicle performance index and the speed at different throttle positions under the vehicle use state, and then realizes the targeted adjustment of the vehicle driving performance.

Description

Technical Field

[0001] This application relates to the field of vehicle testing, and in particular to a method, apparatus, computer equipment, and storage medium for adjusting vehicle driving performance. Background Technology

[0002] With the development of vehicle manufacturing technology, the market has increasingly higher requirements for vehicle fuel economy and handling. Vehicle driving performance is closely related to fuel economy and handling. Under stable driving conditions, vehicle driving performance determines fuel economy and handling.

[0003] Traditional solutions rarely involve adjusting vehicle driving performance. They usually only test vehicle driving performance under constant speed and fuel consumption to obtain vehicle driving performance data, but cannot effectively adjust vehicle driving performance to enhance vehicle fuel economy and handling.

[0004] Therefore, how to effectively adjust the driving performance of vehicles is an urgent problem to be solved. Summary of the Invention

[0005] Therefore, it is necessary to provide a vehicle driving performance adjustment method, device, computer equipment, computer-readable storage medium, and computer program product that can effectively improve vehicle driving performance in response to the above-mentioned technical problems.

[0006] Firstly, this application provides a method for adjusting vehicle driving performance. The method includes:

[0007] Within the vehicle's engine speed range, acquire multiple engine speeds;

[0008] Multiple sets of test data were collected at various engine speeds under the vehicle's operating conditions. Each set of test data included the vehicle's drive power and mechanical system friction power collected at various throttle openings.

[0009] Plot the vehicle speed regulation characteristic curve based on the test data corresponding to each engine speed.

[0010] Adjust the vehicle's driving performance based on the plotted vehicle speed regulation characteristic curve.

[0011] In one embodiment, acquiring multiple sets of test data collected at multiple engine speeds under the vehicle's operating condition includes:

[0012] When the vehicle is in use, for the current engine speed among multiple engine speeds, when the vehicle's engine is at the current engine speed, the total vehicle drive power and mechanical system friction power collected at multiple throttle openings are obtained. The total vehicle drive power corresponding to each throttle opening is collected when the transmission is in gear, and the mechanical system friction power corresponding to each throttle opening is collected when the transmission is in neutral.

[0013] In one embodiment, the step of plotting the vehicle speed regulation characteristic curve based on the test data corresponding to each engine speed includes:

[0014] For each throttle opening at each engine speed, the engine torque corresponding to each throttle opening is calculated based on the vehicle drive power and mechanical system friction power corresponding to each throttle opening.

[0015] Plot the vehicle speed regulation characteristic curve based on the engine torque corresponding to each throttle opening at each engine speed.

[0016] In one embodiment, the step of calculating the engine torque corresponding to each throttle opening at each engine speed, based on the vehicle drive power and mechanical system friction power corresponding to each throttle opening, includes:

[0017] For each throttle opening at each engine speed, the total vehicle drive power and mechanical system friction power corresponding to each throttle opening are summed to obtain the engine power used for each throttle opening.

[0018] Based on the engine power and engine speed corresponding to each throttle opening, the engine torque corresponding to each throttle opening at each engine speed is calculated.

[0019] In one embodiment, the step of plotting the vehicle speed regulation characteristic curve based on the engine torque corresponding to each throttle opening at each engine speed includes:

[0020] For each throttle opening, the vehicle speed regulation characteristic curve is determined based on the engine torque corresponding to each engine speed.

[0021] In one embodiment, adjusting the vehicle driving performance based on the plotted vehicle speed regulation characteristic curve includes:

[0022] The target driving requirements are obtained, and the relationship between engine speed, throttle opening and engine torque is adjusted according to the vehicle speed regulation characteristic curve drawn and the target driving requirements.

[0023] In one embodiment, the engine speed is a whole 100 RPM within the engine operating speed range determined from idle speed to rated speed; the plurality of throttle openings includes the full throttle opening point.

[0024] Secondly, this application also provides a vehicle driving performance adjustment device. The device includes:

[0025] The acquisition module is used to acquire multiple engine speeds within the operating speed range of the vehicle engine;

[0026] The acquisition module is also used to acquire multiple sets of test data collected at multiple engine speeds, wherein each set of test data includes: the vehicle drive power and mechanical system friction power collected at multiple throttle openings;

[0027] The plotting module is used to plot the vehicle speed regulation characteristic curve based on the test data corresponding to each engine speed.

[0028] The adjustment module is used to adjust the vehicle's driving performance based on the plotted vehicle speed regulation characteristic curve.

[0029] Thirdly, this application also provides a computer device. The computer device includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to perform the following steps:

[0030] Within the vehicle's engine speed range, acquire multiple engine speeds;

[0031] Multiple sets of test data were collected at various engine speeds under the vehicle's operating conditions. Each set of test data included the vehicle's drive power and mechanical system friction power collected at various throttle openings.

[0032] Plot the vehicle speed regulation characteristic curve based on the test data corresponding to each engine speed.

[0033] Adjust the vehicle's driving performance based on the plotted vehicle speed regulation characteristic curve.

[0034] Fourthly, this application also provides a computer-readable storage medium. The computer-readable storage medium stores a computer program thereon, which, when executed by a processor, performs the following steps:

[0035] Within the vehicle's engine speed range, acquire multiple engine speeds;

[0036] Multiple sets of test data were collected at various engine speeds under the vehicle's operating conditions. Each set of test data included the vehicle's drive power and mechanical system friction power collected at various throttle openings.

[0037] Plot the vehicle speed regulation characteristic curve based on the test data corresponding to each engine speed.

[0038] Adjust the vehicle's driving performance based on the plotted vehicle speed regulation characteristic curve.

[0039] Fifthly, this application also provides a computer program product. The computer program product includes a computer program that, when executed by a processor, performs the following steps:

[0040] Within the vehicle's engine speed range, acquire multiple engine speeds;

[0041] Multiple sets of test data were collected at various engine speeds under the vehicle's operating conditions. Each set of test data included the vehicle's drive power and mechanical system friction power collected at various throttle openings.

[0042] Plot the vehicle speed regulation characteristic curve based on the test data corresponding to each engine speed.

[0043] Adjust the vehicle's driving performance based on the plotted vehicle speed regulation characteristic curve.

[0044] The aforementioned vehicle driving performance adjustment method, device, computer equipment, storage medium, and computer program product acquire multiple engine speeds within the vehicle engine's operating speed range. For each engine speed under full vehicle operation, the vehicle's driving power and mechanical system friction power are collected at multiple throttle openings. By plotting curves using the collected test data, the relationship between throttle opening, engine speed, and vehicle performance indicators (such as power) can be obtained. Furthermore, the vehicle's driving performance can be adjusted based on the plotted vehicle speed regulation characteristic curve, enabling targeted adjustments and significantly improving the effectiveness and accuracy of driving performance adjustment. Attached Figure Description

[0045] Figure 1 This is a diagram illustrating the application environment of the vehicle driving performance adjustment method in some embodiments;

[0046] Figure 2 This is a flowchart illustrating the vehicle driving performance adjustment method in some embodiments;

[0047] Figure 3 This is a flowchart illustrating the process of plotting vehicle speed regulation characteristic curves in some embodiments.

[0048] Figure 4 This is a flowchart illustrating the calculation of engine torque in some embodiments;

[0049] Figure 5This is a simulation chamber for the application environment of the vehicle driving performance adjustment method in some embodiments;

[0050] Figure 6 Vehicle speed regulation characteristic curves plotted in some embodiments;

[0051] Figure 7 This is a structural block diagram of the vehicle driving performance adjustment device in some embodiments;

[0052] Figure 8 This is a diagram showing the internal structure of a computer device in some embodiments. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0054] It should be noted that the terms "comprising," "including," "having," and any variations thereof, as used in this application, are intended to cover non-exclusive inclusion. For example, a process, method, product, or apparatus that includes a series of steps or means is not necessarily limited to the steps that are clearly listed, but may also include other steps or means that are not clearly listed or that are inherent to such process, method, product, or apparatus. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0055] Furthermore, the terms "first," "second," etc., used in this application are for naming purposes to distinguish similar objects, but these objects themselves are not limited by these terms. It should be understood that these terms may be used interchangeably where appropriate without departing from the scope of this application. For example, "first quantity" may be described as "second quantity," and similarly, "second quantity" may be described as "first quantity."

[0056] The vehicle driving performance adjustment method provided in this application embodiment can be applied to, for example, Figure 1 The application environment is shown. The test vehicle 102 is connected to the chassis dynamometer 104. The computer device 106 can be connected to the test vehicle 102 via a network CAN bus, and the chassis dynamometer 104 can be connected to the computer device 106 via a network. The data storage system can store the data that the computer device 106 needs to process. The data storage system can be integrated into the computer device 106, or it can be placed in the cloud or on another network server.

[0057] Computer device 106 acquires multiple engine speeds of test vehicle 102 within its engine operating speed range from the CAN bus of test vehicle 102, and acquires multiple sets of test data collected at multiple engine speeds under the vehicle's operating state from chassis dynamometer 104. Each set of test data includes: the vehicle's driving power and mechanical system friction power collected at multiple throttle openings. Then, based on the test data corresponding to each engine speed, a vehicle speed regulation characteristic curve is plotted, and the vehicle's driving performance is adjusted according to the plotted vehicle speed regulation characteristic curve.

[0058] The multiple engine speeds acquired by the computer device 106, as well as the multiple sets of test data collected at each engine speed, can be stored locally or in a data storage system. The computer device 106 can be implemented using a standalone server or a server cluster consisting of multiple servers.

[0059] In one embodiment, such as Figure 2 As shown, a method for adjusting vehicle driving performance is provided, which can be applied to... Figure 1 Taking a computer device as an example, the explanation includes the following steps:

[0060] Step 202: Obtain multiple engine speeds within the vehicle engine's operating speed range.

[0061] The engine is the device that provides power to the vehicle, and engine speed refers to the number of revolutions the engine crankshaft makes per minute. The engine's operating speed range refers to the range of revolutions the engine crankshaft can make when the engine is running, generally referring to the speed range from the engine's idle speed to its rated speed.

[0062] Specifically, when it is necessary to conduct a vehicle speed regulation characteristic test on the test vehicle, the computer equipment can select multiple engine speeds from the corresponding engine operating speed range.

[0063] In some embodiments, the computer device may randomly select a preset number of distinct engine speeds from within the engine's operating speed range. In other embodiments, the computer device may start from the initial speed of the engine's operating speed range and select an engine speed at preset speed intervals until a preset number of engine speeds have been selected from within the engine's operating speed range.

[0064] In some embodiments, the engine speed obtained by the computer device can be a whole 100 RPM within the engine's operating speed range. Of course, the computer device can also obtain non-whole 100 RPMs, and this application embodiment does not limit this.

[0065] Step 204: Obtain multiple sets of test data collected at multiple engine speeds under the vehicle's operating conditions. Each set of test data includes: the vehicle's driving power and mechanical system friction power collected at multiple throttle openings.

[0066] The test data refers to the vehicle performance parameters obtained from the chassis dynamometer during the vehicle speed regulation characteristic test. Throttle opening refers to the degree of throttle pedal opening; controlling the throttle pedal opening controls the engine's fuel injection quantity. Multiple throttle openings include the full throttle opening point.

[0067] In this embodiment, the relevant parameters regarding vehicle performance include the overall vehicle drive power and the mechanical system friction power of the test vehicle. The overall vehicle drive power refers to the net power output by the test vehicle's engine during operation, transmitted through the transmission system to the drive wheels to overcome driving resistance, drive the drive wheels to rotate, and propel the vehicle. The mechanical system friction power of the test vehicle refers to the power consumed to overcome the mechanical friction losses of the engine itself and the external losses from driving other auxiliary machinery.

[0068] Specifically, the computer equipment acquires multiple sets of test data from the chassis dynamometer at various engine speeds while the test vehicle is in full operation. Each set of test data includes the vehicle's drive power and mechanical system friction power collected at multiple throttle openings. Understandably, after acquiring the multiple sets of test data at various engine speeds, the chassis dynamometer transmits the acquired test data to the computer equipment, which then acquires the multiple sets of test data at various engine speeds.

[0069] In one embodiment, when the test vehicle is in full-vehicle use and at a specific throttle opening at a specific engine speed, the computer device obtains the engine speed and throttle opening from the test vehicle's CAN bus. At the same time, it obtains the vehicle's overall drive power and mechanical system friction power at that throttle opening from the chassis dynamometer, thereby obtaining the vehicle's overall drive power and mechanical system friction power corresponding to a specific throttle opening at a specific engine speed.

[0070] In one embodiment, when the test vehicle is in use and the engine speed is at a specific speed, the throttle opening can be changed by controlling the accelerator pedal. Then, when a specific throttle opening is reached, the computer device can obtain the throttle opening from the test vehicle's CAN bus.

[0071] Step 206: Plot the vehicle speed regulation characteristic curve based on the test data corresponding to each engine speed.

[0072] Among them, vehicle speed regulation characteristics refer to the relationship between vehicle performance indicators and speed. The vehicle speed regulation characteristic curve is a visual representation of the relationship between vehicle performance indicators and speed. In this embodiment, the performance indicators of the test vehicle can be represented by test data collected by a chassis dynamometer, specifically by the vehicle drive power and mechanical system friction power collected by the chassis dynamometer.

[0073] Specifically, for multiple sets of test data corresponding to multiple engine speeds under vehicle operating conditions, the test data for each engine speed includes the vehicle drive power and mechanical system friction power collected at multiple throttle openings. Therefore, for each throttle opening at each engine speed, the vehicle performance index at that moment can be represented by the vehicle drive power and mechanical system friction power at the corresponding throttle opening. That is, based on the test data corresponding to each engine speed, the vehicle performance index for each throttle opening at each engine speed can be determined, and thus a vehicle speed regulation characteristic curve that intuitively reflects the relationship between vehicle performance index and speed at different throttle openings under vehicle operating conditions can be plotted.

[0074] Step 208: Adjust the vehicle driving performance according to the plotted vehicle speed regulation characteristic curve.

[0075] It should be noted that the speed regulation characteristics of a vehicle during use need to be determined based on driving requirements; that is, there exists an optimal speed regulation characteristic corresponding to driving requirements. These driving requirements are determined based on the requirements of the supporting equipment system and the user's needs. The vehicle speed regulation characteristic curve plotted in this embodiment represents the measured speed regulation characteristics of the test vehicle. By comparing the measured speed regulation characteristics with the optimal speed regulation characteristics, the test results of the vehicle's speed regulation characteristics can be determined.

[0076] In one embodiment, adjusting vehicle driving performance based on a plotted vehicle speed regulation characteristic curve includes: obtaining target driving requirements, and adjusting the relationship between engine speed, throttle opening, and engine torque according to the plotted vehicle speed regulation characteristic curve and the target driving requirements.

[0077] Among them, target driving needs refer to the equipment system requirements and user needs that are to be met.

[0078] Specifically, the computer equipment can obtain the measured speed regulation characteristics based on the plotted vehicle speed regulation characteristic curve. Furthermore, after acquiring the target driving requirements, the computer equipment can determine the difference between the measured speed regulation characteristics and the optimal speed regulation characteristics for the target driving requirements. It can then adjust the relationship between engine speed, throttle opening, and engine torque accordingly based on this difference to adjust the vehicle's driving performance.

[0079] For example, the optimal speed control characteristics for a target driving need require that, at a specific engine speed, a smaller throttle opening should correspond to a smaller engine torque. If, in the plotted vehicle speed control characteristic curve, a smaller throttle opening corresponds to a larger engine torque at a specific engine speed, then it is necessary to reduce the torque corresponding to the smaller throttle opening at that specific engine speed in order to complete the calibration of the vehicle speed control characteristics, that is, to adjust the driving performance.

[0080] The aforementioned vehicle driving performance adjustment method acquires multiple engine speeds within the vehicle's engine operating speed range under normal vehicle conditions. For each engine speed, the vehicle's driving power and mechanical system friction power are collected at multiple throttle openings. By plotting curves using the collected test data, the relationship between throttle opening, engine speed, and vehicle performance indicators (such as power) can be obtained. Furthermore, the vehicle's driving performance can be adjusted based on the plotted vehicle speed regulation characteristic curve, enabling targeted adjustments and significantly improving the effectiveness and accuracy of driving performance adjustments.

[0081] In one embodiment, multiple sets of test data are acquired at multiple engine speeds under the vehicle's operating state, including: when the vehicle is in the operating state, for the current engine speed among multiple engine speeds, the vehicle drive power and mechanical system friction power are acquired at multiple throttle openings when the vehicle engine is at the current engine speed, wherein the vehicle drive power corresponding to each throttle opening is acquired when the transmission is in gear, and the mechanical system friction power corresponding to each throttle opening is acquired when the transmission is in neutral.

[0082] The transmission is a gearbox in a vehicle that coordinates engine speed and the actual speed of the wheels. By shifting the gear lever, the transmission gears can be adjusted to control the vehicle's forward or reverse movement. The transmission being in neutral means that the gear lever is not engaged in any forward or reverse gear, and the transmission is completely disengaged from the drive wheels. The transmission being in gear means that the gear lever is engaged in any gear (except neutral). The overall drive power of the test vehicle needs to be collected when the transmission is in gear, while the frictional power of the test vehicle's mechanical system needs to be collected when the transmission is in neutral.

[0083] Multiple sets of test data were collected at various engine speeds while the vehicle was in use. Test data collected at multiple throttle openings at each engine speed constituted one set of test data. The engine speed at which the test vehicle was operating when collecting one set of test data can be referred to as the current engine speed. Specifically, when the test vehicle was at a specific throttle opening at the current engine speed, the computer controlled the vehicle's transmission to be in gear, and the chassis dynamometer collected the vehicle's overall drive power at that moment. When the vehicle was in neutral, the computer controlled the transmission to be in neutral, and the chassis dynamometer collected the mechanical system friction power at that moment. Thus, the overall drive power and mechanical system friction power corresponding to the specific throttle opening at the current engine speed were obtained.

[0084] When the test vehicle is at the current engine speed, the computer equipment controls the throttle opening through the accelerator pedal. At each specific throttle opening, the computer controls the test vehicle's transmission to be in gear and collects the vehicle's overall drive power at that throttle opening. The computer also controls the test vehicle's transmission to be in neutral and collects the mechanical system friction power at that throttle opening. This allows the computer to obtain the vehicle's overall drive power and mechanical system friction power collected at multiple throttle openings at the current engine speed.

[0085] In the above embodiments, under the current engine speed in the vehicle's operating state, the computer equipment collects the vehicle's drive power corresponding to multiple throttle openings by controlling the vehicle's transmission to be in gear, and collects the mechanical system friction power corresponding to multiple throttle openings by controlling the vehicle's transmission to be in neutral. In this way, the computer equipment can obtain the vehicle performance indicators corresponding to multiple throttle openings under the current engine speed in the vehicle's operating state.

[0086] In one embodiment, such as Figure 3 As shown, the vehicle speed regulation characteristic curve is plotted based on the test data corresponding to each engine speed, including:

[0087] Step 302: For each throttle opening at each engine speed, calculate the engine torque corresponding to each throttle opening based on the vehicle drive power and mechanical system friction power corresponding to each throttle opening.

[0088] Engine torque refers to the torque that causes the crankshaft to rotate when the engine is running; it is also called engine torque. Engine torque is a specific indicator of engine acceleration capability and can be used to characterize vehicle performance.

[0089] Specifically, the engine power used at each throttle opening can be determined based on the vehicle drive power and mechanical system friction power corresponding to each throttle opening, and the engine torque can be determined by the engine power used at each throttle opening.

[0090] Step 304: Plot the vehicle speed regulation characteristic curve based on the engine torque corresponding to each throttle opening at each engine speed.

[0091] Among them, the vehicle speed regulation characteristic curve is a visual representation of the relationship between vehicle performance indicators and speed.

[0092] Specifically, a vehicle's speed regulation performance can be represented by engine torque. For the engine torque corresponding to each throttle opening at multiple engine speeds, there exists a relationship between engine torque and engine speed at each throttle opening. Therefore, based on the engine torque corresponding to each throttle opening at each engine speed, vehicle speed regulation characteristic curves corresponding to multiple throttle openings can be plotted.

[0093] In the above embodiments, based on the vehicle drive power and mechanical system friction power corresponding to each throttle opening at each engine speed, the engine torque corresponding to each throttle opening at each engine speed is obtained. The obtained engine torque corresponding to each throttle opening at each engine speed is used as a vehicle performance index. The relationship between the vehicle performance index and the speed under different throttle openings is plotted, which can intuitively reflect the vehicle speed regulation characteristic curve under different throttle openings.

[0094] In one embodiment, for each throttle opening at each engine speed, the engine torque corresponding to each throttle opening is calculated based on the vehicle drive power and mechanical system friction power corresponding to each throttle opening, including:

[0095] Step 402: For each throttle opening at each engine speed, sum the vehicle drive power and mechanical system friction power corresponding to each throttle opening to obtain the engine power used at each throttle opening.

[0096] Engine operating power refers to the power generated when the engine is working. The power generated when the engine is working is used on the one hand to overcome the mechanical friction loss of the engine itself and the external losses of driving other auxiliary machines, and on the other hand to output effective net power to the drive wheels.

[0097] Specifically, for each throttle opening at each engine speed, the effective net power output from the engine crankshaft to the drive wheel is the total vehicle drive power collected by the chassis dynamometer when the transmission is in gear. The power consumed to overcome the mechanical friction loss of the engine itself and the external losses of driving other auxiliary machines is the mechanical system friction power collected by the chassis dynamometer when the transmission is in neutral. Then, the engine power can be obtained by formula (1):

[0098] P ED =PVD +P MD (1)

[0099] Among them, P ED Power output of the engine, measured in kW; P VD The total vehicle drive power, measured in kW, is obtained from the chassis dynamometer. MD The frictional power of the mechanical system is collected by the chassis dynamometer, and the unit is kW.

[0100] Step 404: Based on the engine power and engine speed corresponding to each throttle opening, calculate the engine torque corresponding to each throttle opening at each engine speed.

[0101] It should be noted that, under normal vehicle operating conditions, the engine's operating power is the product of the engine torque and the engine crankshaft angular velocity. The engine crankshaft angular velocity is the angle the engine rotates per minute. Under the condition of a fixed engine operating power, engine torque is inversely proportional to engine speed.

[0102] Specifically, the engine's operating power, engine torque, and engine speed satisfy the following relationship:

[0103] P ED =Te*w

[0104] =Te*(2π*n e / 60)

[0105] =Te*n e / 9549 (2)

[0106] Formula (3) can be obtained from formula (2).

[0107] T e =9549*P ED / n e (3)

[0108] In some embodiments, the engine power used at each throttle opening at each engine speed has been calculated. Therefore, the engine torque at each throttle opening at each speed can be obtained according to formula (3).

[0109] Among them, T e Engine torque is expressed in N·m; w is the engine crankshaft angular velocity, expressed in rad / s; n e Engine speed, in r / min.

[0110] In the above embodiments, by summing the vehicle drive power and mechanical system friction power corresponding to each throttle opening at each engine speed, the engine power used at each throttle opening at each engine speed can be obtained accurately and quickly. Then, based on the engine power used at each throttle opening at each engine speed, the engine torque corresponding to each throttle opening at each engine speed can be obtained. The obtained engine torque corresponding to each throttle opening at each engine speed can be used as a vehicle performance indicator.

[0111] In one embodiment, a vehicle speed regulation characteristic curve is plotted based on the engine torque corresponding to each throttle opening at each engine speed, including: for each throttle opening, determining the vehicle speed regulation characteristic curve at the corresponding throttle opening based on the engine torque corresponding to each engine speed.

[0112] Specifically, for the engine torque corresponding to each throttle opening obtained at multiple engine speeds, there is a relationship between engine torque and engine speed at each throttle opening. Therefore, by plotting the relationship between engine torque and speed for each throttle opening, the vehicle speed regulation characteristic curve at the corresponding throttle opening can be determined.

[0113] The above embodiments determine the vehicle speed regulation characteristic curve for each throttle opening based on the engine torque corresponding to each engine speed, which can intuitively reflect the relationship between engine torque and engine speed at each throttle opening.

[0114] The vehicle driving performance adjustment method of this application will be described in detail below with a specific embodiment:

[0115] It should be noted that this embodiment can be implemented as follows: Figure 5 The simulation was conducted in the aforementioned environmental chamber. Figure 5 As shown, the environmental simulation chamber includes a test vehicle and a chassis dynamometer.

[0116] Before the computer equipment can acquire multiple engine speeds within the engine's operating speed range, the test vehicle needs to be preheated. Vehicle preheating refers to starting the vehicle and allowing the engine to rise from ambient temperature to its normal operating temperature. Specifically, a chassis dynamometer is connected to the test vehicle and set to simulate road resistance, with the road resistance set according to the test vehicle's rated load. After the chassis dynamometer is set, the test vehicle is driven continuously at 80% of its maximum speed for 30 km to complete the vehicle preheating.

[0117] After the test vehicle has warmed up, the computer system acquires a first set (e.g., 10) of engine speeds from the test vehicle's CAN bus, ranging from low to high within the engine's operating speed range. The acquired engine speeds can be integers within the engine's operating speed range defined by idle speed to rated speed, and can include both the engine's rated idle speed and rated speed. The engine's idle speed refers to the speed at which the engine operates in neutral. The engine's rated speed refers to the speed at which the engine operates at its rated power.

[0118] At each engine speed under full vehicle operating conditions, the computer controls the throttle opening by adjusting the accelerator pedal. At each specific throttle opening, the throttle opening is retrieved from the test vehicle's CAN bus. In constant speed mode, the chassis dynamometer collects the vehicle's overall drive power at that throttle opening when the vehicle is in gear, and the mechanical system friction power at that throttle opening when the vehicle is in neutral. This allows for the acquisition of the vehicle's drive power and mechanical system friction power at a second number (e.g., 10) throttle openings at a specific engine speed. A specific throttle opening can include the throttle fully open point, i.e., the throttle is 100% open. The vehicle's drive power and mechanical system friction power at each throttle opening must vary within ±0.5 (1% of the measured value) kW to be collected, and the collection time must be no less than 20 seconds.

[0119] Once the vehicle's drive power and mechanical system friction power at multiple throttle openings corresponding to the current engine speed under normal vehicle operating conditions have been collected, the engine speed can be controlled to change. When the next engine speed is reached, the above steps are repeated until the vehicle's drive power and mechanical system friction power corresponding to 10 throttle openings at 10 engine speeds under normal vehicle operating conditions are obtained. The selected throttle opening is the same for each engine speed.

[0120] In the process of obtaining the vehicle drive power and mechanical system friction power corresponding to 10 engine speeds and 10 throttle openings under the vehicle's operating conditions, other characteristic parameters such as engine water temperature, oil temperature, intake and exhaust pressure, cooling fan speed, throttle position, actual engine torque, friction torque, and instantaneous fuel consumption can also be obtained from the CAN bus of the test vehicle according to the test requirements.

[0121] After obtaining the vehicle drive power and mechanical system friction power corresponding to 10 throttle openings at 10 engine speeds under vehicle operating conditions, firstly, the vehicle drive power and mechanical system friction power corresponding to each throttle opening at each engine speed are summed to obtain the engine power used at each throttle opening. Secondly, based on the engine power used at each throttle opening and the engine speed, the engine torque corresponding to each throttle opening at each engine speed is calculated. Finally, the speed regulation characteristic curve of the test vehicle is plotted based on the relationship between engine torque and engine speed at each throttle opening. The plotted vehicle speed regulation characteristic curve is shown below. Figure 6 As shown.

[0122] Computer equipment can obtain the measured speed regulation characteristics based on the plotted vehicle speed regulation characteristic curve, determine the difference between the measured speed regulation characteristics and the optimal speed regulation characteristics for the target driving needs, and then adjust the relationship between engine speed, throttle opening and engine torque according to the difference to adjust the vehicle driving performance.

[0123] For example, in the optimal speed regulation characteristics, a smaller throttle opening corresponds to a smaller engine torque, while in the actual speed regulation characteristics, a smaller throttle opening corresponds to a larger engine torque. In this case, it is necessary to reduce the torque corresponding to the smaller throttle opening at that specific engine speed in order to complete the calibration of the vehicle speed regulation characteristics, that is, to adjust the driving performance.

[0124] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0125] Based on the same inventive concept, such as Figure 7 As shown, this application also provides a vehicle driving performance adjustment device 700, including: an acquisition module 702, a drawing module 704, and an adjustment module 706, wherein:

[0126] The acquisition module 702 is used to acquire multiple engine speeds within the operating speed range of the vehicle engine.

[0127] The acquisition module 702 is also used to acquire multiple sets of test data collected at multiple engine speeds under the vehicle's operating state. Each set of test data includes: the vehicle's driving power and mechanical system friction power collected at multiple throttle openings.

[0128] The plotting module 704 is used to plot the vehicle speed regulation characteristic curve based on the test data corresponding to each engine speed.

[0129] The adjustment module 706 is used to adjust the vehicle's driving performance based on the plotted vehicle speed regulation characteristic curve.

[0130] In one embodiment, the acquisition module is further configured to, when the vehicle is in use, acquire the vehicle drive power and mechanical system friction power collected at multiple throttle openings for the current engine speed among multiple engine speeds, while the vehicle engine is at the current engine speed. The vehicle drive power corresponding to each throttle opening is collected when the transmission is in gear, and the mechanical system friction power corresponding to each throttle opening is collected when the transmission is in neutral.

[0131] In one embodiment, the plotting module is further configured to calculate the engine torque corresponding to each throttle opening at each engine speed, based on the vehicle drive power and mechanical system friction power corresponding to each throttle opening; and plot the vehicle speed regulation characteristic curve according to the engine torque corresponding to each throttle opening at each engine speed.

[0132] In one embodiment, the drawing module is further configured to sum the vehicle drive power and mechanical system friction power corresponding to each throttle opening at each engine speed to obtain the engine power used at each throttle opening; and to calculate the engine torque corresponding to each throttle opening at each engine speed based on the engine power used at each throttle opening and the engine speed.

[0133] In one embodiment, the plotting module is also used to determine the vehicle speed regulation characteristic curve under the corresponding throttle opening based on the engine torque corresponding to each engine speed for each throttle opening.

[0134] In one embodiment, the adjustment module is further configured to acquire the target driving requirements, and adjust the relationship between engine speed, throttle opening and engine torque according to the plotted vehicle speed regulation characteristic curve and the target driving requirements.

[0135] Each module in the aforementioned vehicle driving performance adjustment device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device, or stored in the memory of a computer device as software, so that the processor can call and execute the corresponding operations of each module.

[0136] In one embodiment, a computer device is provided, which may be a terminal or a server, and its internal structure diagram may be as follows: Figure 8 As shown, the computer device includes a processor, memory, and a communication interface connected via a system bus. The processor provides computing and control capabilities. The memory includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs stored in the non-volatile storage medium. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through Wi-Fi, mobile cellular networks, NFC (Near Field Communication), or other technologies. When executed by the processor, the computer program implements a method for adjusting vehicle driving performance.

[0137] Those skilled in the art will understand that Figure 8 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0138] In one embodiment, a computer device is provided, including a memory and a processor. The memory stores a computer program, and the processor executes the computer program to perform the following steps: acquiring multiple engine speeds within the operating speed range of the vehicle engine; acquiring multiple sets of test data collected at the multiple engine speeds under the vehicle's operating conditions, wherein each set of test data includes: the vehicle's driving power and mechanical system friction power collected at multiple throttle openings; plotting a vehicle speed regulation characteristic curve based on the test data corresponding to each engine speed; and adjusting the vehicle's driving performance based on the plotted vehicle speed regulation characteristic curve.

[0139] In one embodiment, when the processor executes the computer program, it further performs the following steps: for the current engine speed among multiple engine speeds under the vehicle's operating state, when the vehicle engine is at the current engine speed, it acquires the vehicle drive power and mechanical system friction power collected at multiple throttle openings, wherein the vehicle drive power corresponding to each throttle opening is collected when the transmission is in gear, and the mechanical system friction power corresponding to each throttle opening is collected when the transmission is in neutral.

[0140] In one embodiment, when the processor executes the computer program, it also performs the following steps: for each throttle opening at each engine speed, the engine torque corresponding to each throttle opening is calculated based on the vehicle drive power and mechanical system friction power corresponding to each throttle opening; and the vehicle speed regulation characteristic curve is plotted according to the engine torque corresponding to each throttle opening at each engine speed.

[0141] In one embodiment, when the processor executes the computer program, it also performs the following steps: for each throttle opening at each engine speed, summing the vehicle drive power and mechanical system friction power corresponding to each throttle opening to obtain the engine power used at each throttle opening; and calculating the engine torque corresponding to each throttle opening at each engine speed based on the engine power used at each throttle opening and the engine speed.

[0142] In one embodiment, when the processor executes the computer program, it also performs the following steps: for each throttle opening, based on the engine torque corresponding to each engine speed, determine the vehicle speed regulation characteristic curve under the corresponding throttle opening.

[0143] In one embodiment, when the processor executes the computer program, it also performs the following steps: adjusting the vehicle driving performance according to the plotted vehicle speed regulation characteristic curve includes: obtaining the target driving requirements, and adjusting the relationship between engine speed, throttle opening and engine torque according to the plotted vehicle speed regulation characteristic curve and the target driving requirements.

[0144] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, it performs the following steps: acquiring multiple engine speeds within the operating speed range of the vehicle engine; acquiring multiple sets of test data collected at the multiple engine speeds under the vehicle's operating conditions, wherein each set of test data includes: the vehicle's driving power and mechanical system friction power collected at multiple throttle openings; plotting a vehicle speed regulation characteristic curve based on the test data corresponding to each engine speed; and adjusting the vehicle's driving performance based on the plotted vehicle speed regulation characteristic curve.

[0145] In one embodiment, when the computer program is executed by the processor, it further performs the following steps: for the current engine speed among multiple engine speeds under the vehicle's operating state, when the vehicle engine is at the current engine speed, the vehicle drive power and mechanical system friction power collected at multiple throttle openings are obtained, wherein the vehicle drive power corresponding to each throttle opening is collected when the transmission is in gear, and the mechanical system friction power corresponding to each throttle opening is collected when the transmission is in neutral.

[0146] In one embodiment, when the computer program is executed by the processor, it further performs the following steps: for each throttle opening at each engine speed, calculates the engine torque corresponding to each throttle opening based on the vehicle drive power and mechanical system friction power corresponding to each throttle opening; and plots the vehicle speed regulation characteristic curve according to the engine torque corresponding to each throttle opening at each engine speed.

[0147] In one embodiment, when the computer program is executed by the processor, it further performs the following steps: for each throttle opening at each engine speed, summing the vehicle drive power and mechanical system friction power corresponding to each throttle opening to obtain the engine power used at each throttle opening; and calculating the engine torque corresponding to each throttle opening at each engine speed based on the engine power used at each throttle opening and the engine speed.

[0148] In one embodiment, when the computer program is executed by the processor, it also performs the following steps: for each throttle opening, based on the engine torque corresponding to each engine speed, determine the vehicle speed regulation characteristic curve under the corresponding throttle opening.

[0149] In one embodiment, when the computer program is executed by the processor, it further performs the following steps: adjusting the vehicle driving performance according to the plotted vehicle speed regulation characteristic curve includes: obtaining the target driving requirements, and adjusting the relationship between engine speed, throttle opening and engine torque according to the plotted vehicle speed regulation characteristic curve and the target driving requirements.

[0150] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, performs the following steps: acquiring multiple engine speeds within the operating speed range of a vehicle engine; acquiring multiple sets of test data collected at the multiple engine speeds under the vehicle's operating conditions, wherein each set of test data includes: the vehicle's driving power and mechanical system friction power collected at multiple throttle openings; plotting a vehicle speed regulation characteristic curve based on the test data corresponding to each engine speed; and adjusting the vehicle's driving performance based on the plotted vehicle speed regulation characteristic curve.

[0151] In one embodiment, when the computer program is executed by the processor, it further performs the following steps: for the current engine speed among multiple engine speeds under the vehicle's operating state, when the vehicle engine is at the current engine speed, the vehicle drive power and mechanical system friction power collected at multiple throttle openings are obtained, wherein the vehicle drive power corresponding to each throttle opening is collected when the transmission is in gear, and the mechanical system friction power corresponding to each throttle opening is collected when the transmission is in neutral.

[0152] In one embodiment, when the computer program is executed by the processor, it further performs the following steps: for each throttle opening at each engine speed, calculates the engine torque corresponding to each throttle opening based on the vehicle drive power and mechanical system friction power corresponding to each throttle opening; and plots the vehicle speed regulation characteristic curve according to the engine torque corresponding to each throttle opening at each engine speed.

[0153] In one embodiment, when the computer program is executed by the processor, it further performs the following steps: for each throttle opening at each engine speed, summing the vehicle drive power and mechanical system friction power corresponding to each throttle opening to obtain the engine power used at each throttle opening; and calculating the engine torque corresponding to each throttle opening at each engine speed based on the engine power used at each throttle opening and the engine speed.

[0154] In one embodiment, when the computer program is executed by the processor, it also performs the following steps: for each throttle opening, based on the engine torque corresponding to each engine speed, determine the vehicle speed regulation characteristic curve under the corresponding throttle opening.

[0155] In one embodiment, when the computer program is executed by the processor, it further performs the following steps: adjusting the vehicle driving performance according to the plotted vehicle speed regulation characteristic curve includes: obtaining the target driving requirements, and adjusting the relationship between engine speed, throttle opening and engine torque according to the plotted vehicle speed regulation characteristic curve and the target driving requirements.

[0156] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments described above. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0157] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0158] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A method for adjusting vehicle driving performance, characterized in that, The method includes: Within the operating speed range of the vehicle engine, multiple engine speeds are acquired; Multiple sets of test data were collected at various engine speeds under the vehicle's operating conditions. Each set of test data included the vehicle's drive power and mechanical system friction power collected at various throttle openings. Based on the test data corresponding to each engine speed, plot the vehicle speed regulation characteristic curve; Adjust the vehicle's driving performance according to the plotted vehicle speed regulation characteristic curve; The step of plotting the vehicle speed regulation characteristic curve based on the test data corresponding to each engine speed includes: For each throttle opening at each engine speed, the engine torque corresponding to each throttle opening is calculated based on the vehicle drive power and mechanical system friction power corresponding to each throttle opening. Plot the vehicle speed regulation characteristic curve based on the engine torque corresponding to each throttle opening at each engine speed; The adjustment of vehicle driving performance based on the plotted vehicle speed regulation characteristic curve includes: The target driving requirements are obtained, and the relationship between engine speed, throttle opening and engine torque is adjusted according to the plotted vehicle speed regulation characteristic curve and the target driving requirements.

2. The method according to claim 1, characterized in that, The acquisition of multiple sets of test data collected at various engine speeds under the vehicle's operating conditions includes: When the vehicle is in use, for the current engine speed among multiple engine speeds, when the vehicle engine is at the current engine speed, the total vehicle drive power and mechanical system friction power collected at multiple throttle openings are obtained. The total vehicle drive power corresponding to each throttle opening is collected when the transmission is in gear, and the mechanical system friction power corresponding to each throttle opening is collected when the transmission is in neutral.

3. The method according to claim 1, characterized in that, For each throttle opening at each engine speed, based on the vehicle drive power and mechanical system friction power corresponding to each throttle opening, the engine torque corresponding to each throttle opening is calculated, including: For each throttle opening at each engine speed, the total vehicle drive power and mechanical system friction power corresponding to each throttle opening are summed to obtain the engine power used for each throttle opening. Based on the engine power and engine speed corresponding to each throttle opening, the engine torque corresponding to each throttle opening at each engine speed is calculated.

4. The method according to claim 1, characterized in that, The process of plotting vehicle speed regulation characteristic curves based on the engine torque corresponding to each throttle opening at each engine speed includes: For each throttle opening, the vehicle speed regulation characteristic curve is determined based on the engine torque corresponding to each engine speed.

5. A vehicle driving performance adjustment device, characterized in that, The device includes: The acquisition module is used to acquire multiple engine speeds within the operating speed range of the vehicle engine; The acquisition module is also used to acquire multiple sets of test data collected at multiple engine speeds under the vehicle's operating state. Each set of test data includes: the vehicle's driving power and mechanical system friction power collected at multiple throttle openings. The plotting module is used to plot the vehicle speed regulation characteristic curve based on the test data corresponding to each engine speed. The adjustment module is used to adjust the vehicle's driving performance according to the plotted vehicle speed regulation characteristic curve; The plotting module includes a function for calculating the engine torque corresponding to each throttle opening at each engine speed, based on the vehicle drive power and mechanical system friction power corresponding to each throttle opening; and plotting the vehicle speed regulation characteristic curve based on the engine torque corresponding to each throttle opening at each engine speed. The adjustment module includes a function to acquire target driving requirements, and to adjust the relationship between engine speed, throttle opening, and engine torque according to the plotted vehicle speed regulation characteristic curve and the target driving requirements.

6. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 4.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 4.

8. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 4.

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