A vehicle thermal performance verification method based on a virtual environment cabin

Abstract

The present application relates to a kind of whole vehicle thermal performance verification methods based on virtual environment cabin, comprising the following steps: step one: according to test environment cabin and equipment in cabin, 1:1 reduction is built in three-dimensional virtual verification software virtual environment cabin and virtual equipment in cabin;Step two: according to the performance test parameters of equipment in cabin, calibrate virtual equipment in cabin;Step three: digital vehicle model is placed in virtual environment cabin, adjusts the position of virtual equipment in cabin;Step four: carry out virtual verification, according to test verification method, control environmental temperature and humidity, speed, carry out the verification work of thermal performance related system;The present application not only improves the accuracy and reliability of virtual verification, but also greatly reduces development cost and cycle.

Description

Technical Field

[0001] This invention relates to the field of automotive technology, and in particular to a method for verifying the thermal performance of a vehicle based on a virtual environment cabin. Background Technology

[0002] CAE (Computer-Aided Engineering) plays a crucial role in the product development phase, and virtual verification of thermal performance is a key aspect of automotive product development. Currently, the early matching design and effectiveness verification of automotive engine (motor) cooling systems and air conditioning systems are generally conducted through empirical evaluation, quantitative analysis using 3D virtual verification software, or testing in a comprehensive test environment chamber. This determines whether the engine (motor), air conditioning, and other systems can maintain output performance under extreme conditions, such as heating in extremely cold regions or operation in extremely hot regions, ensuring the safety and comfort of passengers.

[0003] The comprehensive test environment chamber is an important test method for verifying the performance of vehicles under different driving environments and driving conditions. The test environment chamber mainly consists of a chamber body, a pit and dynamometer device, an infrared sunlight system, an intake and exhaust altitude simulation system, a high and low temperature humidity environment air conditioner, a wind speed fan, and safety protection devices, which can meet the diverse environmental and road condition simulation needs in vehicle verification.

[0004] When using existing virtual verification technology to verify the thermal performance of a vehicle, there are several differences compared to comprehensive test environment chamber verification: 1. In virtual verification, vehicle speed and wind speed are uniformly input from the front surface, while in the test environment chamber, wind speed and vehicle speed are provided by a front-mounted airflow system; 2. In virtual verification, temperature and humidity are uniform throughout the entire space, while in the test environment chamber, temperature and humidity are controlled via infrared sunlight and circulating air conditioning, making complete uniformity impossible; 3. There is a significant difference in size between the verification space and the test environment chamber; the test chamber is limited in size, and the left and right walls are relatively close to the vehicle; 4. The test environment chamber contains dynamometer devices, exhaust emission facilities, etc., which obstruct the airflow outside the vehicle. These differences lead to certain errors in the results of virtual verification and test verification, and the deviation in the accuracy of virtual verification may affect the selection of design solutions. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a method for verifying the thermal performance of a vehicle based on a virtual environment cabin.

[0006] This invention is achieved using the following technical solution:

[0007] A method for verifying the thermal performance of a vehicle based on a virtual environment cabin includes the following steps:

[0008] Step 1: Based on the test environment chamber and its equipment, recreate the virtual environment chamber and its equipment at a 1:1 scale in the 3D virtual verification software;

[0009] Step 2: Calibrate the virtual in-cabin equipment based on the performance test parameters of the in-cabin equipment;

[0010] Step 3: Place the digital vehicle model in the virtual environment cabin and adjust the position of the equipment inside the virtual cabin;

[0011] Step 4: Conduct virtual verification. Following the experimental verification method, control the ambient temperature, humidity, and vehicle speed to verify the thermal performance of related systems.

[0012] As a further explanation of the invention, the cabin equipment includes a pit and dynamometer, an infrared sunlight system, an intake and exhaust altitude simulation system, a high and low temperature humidity environment air conditioner, a wind speed fan, and a safety protection device.

[0013] The virtual cabin equipment includes a virtual pit and dynamometer, a virtual infrared sunlight system, a virtual intake and exhaust altitude simulation system, a virtual high and low temperature humidity environment air conditioner, a virtual wind speed fan, and a virtual safety protection device.

[0014] As a further explanation of the invention, in step two, calibrating the virtual cabin equipment includes:

[0015] Based on the fan characteristic curve of the wind turbine, the relationship between the outlet air speed and the fan speed is calibrated in the three-dimensional virtual verification software.

[0016] As a further explanation of the invention, step three, adjusting the position of the equipment inside the virtual cabin, includes:

[0017] Adjust the height and position of the virtual wind turbine based on the height and position of the wind turbine.

[0018] Adjust the output power of the infrared lamps in the virtual infrared sunlight system according to the output power of the infrared lamps in the infrared sunlight system.

[0019] Adjust the relative positions of the drive wheels of the digital vehicle model with respect to the virtual pit and dynamometer device, based on the relative positions of the vehicle's drive wheels, the pit, and the dynamometer device.

[0020] As a further explanation of the invention, step four, the verification work of the thermal performance-related system, includes:

[0021] The digital vehicle model is immersed in a virtual environment chamber for several hours to simulate vehicle operating conditions and begin the test. The test continues until the end, and the values ​​of various virtual sensors in the digital vehicle model are then examined.

[0022] Compared with the prior art, the present invention has the following beneficial technical effects:

[0023] 1. Improved accuracy of virtual verification: By replicating the virtual environment of the test environment chamber at a 1:1 scale, the virtual verification conditions are highly consistent with the actual test environment, effectively improving the accuracy of virtual verification and ensuring that the virtual verification results are more reliable;

[0024] 2. Optimized design process: The virtual environment chamber provides an efficient and low-cost verification method, enabling engineers to identify and resolve thermal performance-related issues in the early design stages, reducing the number of actual tests and costs, and improving design efficiency;

[0025] 3. Shortened development cycle: During vehicle development, multiple virtual verifications can be performed quickly, avoiding the complex preparation work and environmental control time in actual testing, thus significantly shortening the development cycle of vehicle thermal performance verification.

[0026] 4. Reduced costs: By reducing the number of actual tests and the physical resources required (such as test vehicles, fuel, environmental chamber usage time, etc.), the total cost of thermal performance verification is significantly reduced;

[0027] 5. Improved reliability and safety of verification: Virtual verification can more comprehensively and accurately simulate various extreme working conditions, helping engineers to discover potential problems in advance and optimize designs, thereby improving the reliability and safety of vehicle systems.

[0028] 6. Supports simulation of various working conditions and extreme environments: The virtual environment cabin can flexibly adjust virtual verification parameters to support verification under various working conditions and extreme environmental conditions, meeting different market and regulatory requirements. Attached Figure Description

[0029] Figure 1 This is a flowchart of the method of the present invention. Detailed Implementation

[0030] The following detailed description of embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0031] like Figure 1 As shown, a method for verifying the thermal performance of a vehicle based on a virtual environment cabin includes the following steps:

[0032] Step 1: Based on the test environment chamber and its equipment, recreate the virtual environment chamber and its equipment in a 1:1 scale using 3D virtual verification software; that is, recreate the dimensions of the environment chamber according to the test environment chamber drawings; and recreate the dimensions and quantities of various types of equipment in the chamber according to the drawings of the equipment types.

[0033] Step 2: Calibrate the virtual in-cabin equipment based on the performance test parameters of the in-cabin equipment;

[0034] Step 3: Place the digital vehicle model in the virtual environment cabin and adjust the position of the equipment inside the virtual cabin;

[0035] Step 4: Conduct virtual verification. Following the experimental verification method, control the ambient temperature, humidity, and vehicle speed to verify the thermal performance of related systems.

[0036] Step 1: The equipment inside the cabin includes a pit and dynamometer, an infrared sunlight system, an intake and exhaust altitude simulation system, a high and low temperature humidity environment air conditioner, a wind speed fan, and safety protection devices.

[0037] The virtual cabin equipment includes a virtual pit and dynamometer, a virtual infrared sunlight system, a virtual intake and exhaust altitude simulation system, a virtual high and low temperature humidity environment air conditioner, a virtual wind speed fan, and virtual safety protection devices.

[0038] Step two involves calibrating the virtual cabin equipment, including:

[0039] Based on the fan characteristic curve of the wind turbine, the relationship between the outlet air velocity and the fan speed is calibrated in the 3D virtual verification software. This ensures that the fan speed and outlet air velocity are consistent during virtual verification and actual testing. Furthermore, other equipment in the virtual chamber are calibrated according to the performance test parameters of the equipment in the actual test chamber to ensure consistency between virtual and actual testing.

[0040] Step three involves adjusting the positions of equipment within the virtual cabin, including:

[0041] Adjust the height and position of the virtual wind turbine based on the height and position of the wind turbine.

[0042] Adjust the output power of the infrared lamps in the virtual infrared sunlight system according to the output power of the infrared lamps in the infrared sunlight system.

[0043] Based on the relative positions of the vehicle's drive wheels, the pit, and the dynamometer, the relative positions of the digital vehicle model's drive wheels, the virtual pit, and the dynamometer are adjusted. This ensures that the movable equipment inside the virtual cabin during virtual verification is consistent with the movable equipment inside the cabin during actual experimental verification.

[0044] Step four involves verifying the thermal performance of the relevant systems, including:

[0045] A digital vehicle model is immersed in a virtual environment chamber for several hours to simulate vehicle operating conditions and begin testing. The results are then analyzed by examining the values ​​of various virtual sensors within the digital vehicle model. This approach allows for virtual verification to achieve the same boundaries, loads, and verification effects as real-world testing. It not only improves the accuracy and reliability of virtual verification but also significantly reduces development costs and time, providing an efficient, economical, and reliable new method for verifying automotive thermal performance.

[0046] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for verifying the thermal performance of a vehicle based on a virtual environment cabin, characterized in that, Includes the following steps: Step 1: Based on the test environment chamber and its equipment, recreate the virtual environment chamber and its equipment at a 1:1 scale in the 3D virtual verification software; Step 2: Calibrate the virtual in-cabin equipment based on the performance test parameters of the in-cabin equipment; Step 3: Place the digital vehicle model in the virtual environment cabin and adjust the position of the equipment inside the virtual cabin; Step 4: Conduct virtual verification. Following the experimental verification method, control the ambient temperature, humidity, and vehicle speed to verify the thermal performance of related systems.

2. The vehicle thermal performance verification method based on a virtual environment cabin as described in claim 1, characterized in that, The equipment inside the cabin includes a pit and dynamometer, an infrared sunlight system, an intake and exhaust altitude simulation system, a high and low temperature humidity environment air conditioner, a wind speed fan, and safety protection devices. The virtual cabin equipment includes a virtual pit and dynamometer, a virtual infrared sunlight system, a virtual intake and exhaust altitude simulation system, a virtual high and low temperature humidity environment air conditioner, a virtual wind speed fan, and a virtual safety protection device.

3. The method for verifying the thermal performance of a vehicle based on a virtual environment cabin as described in claim 2, characterized in that, In step two, calibrating the virtual cabin equipment includes: Based on the fan characteristic curve of the wind turbine, the relationship between the outlet air speed and the fan speed is calibrated in the three-dimensional virtual verification software.

4. The vehicle thermal performance verification method based on a virtual environment cabin as described in claim 3, characterized in that, In step three, adjusting the position of the equipment inside the virtual cabin includes: Adjust the height and position of the virtual wind turbine based on the height and position of the wind turbine. Adjust the output power of the infrared lamps in the virtual infrared sunlight system according to the output power of the infrared lamps in the infrared sunlight system. Adjust the relative positions of the drive wheels of the digital vehicle model with respect to the virtual pit and dynamometer device, based on the relative positions of the vehicle's drive wheels, the pit, and the dynamometer device.

5. The vehicle thermal performance verification method based on a virtual environment cabin as described in claim 4, characterized in that, Step four, the verification of the thermal performance-related systems, includes: The digital vehicle model is immersed in a virtual environment chamber for several hours to simulate vehicle operating conditions and begin the test. The test continues until the end, and the values ​​of various virtual sensors in the digital vehicle model are then examined.

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