Car roof deformation control system

Abstract

The invention discloses a vehicle roof deformation control system, and belongs to the technical field of vehicle damping. Comprising a front road condition sensing device used for scanning a front road surface in advance and detecting a bumpy road section to be encountered; the suspension system is used for absorbing first-stage impact energy from the road surface in the vehicle running process and achieving first-stage shock absorption; the variable damping supporting rod is arranged between the suspension system and the car roof framework, and the variable damping supporting rod achieves secondary damping on the car roof framework by adjusting the damping value; the vehicle control unit analyzes and predicts the impact load to be borne by the chassis through road condition data detected by the front road condition sensing device in combination with the weight of the roof load and the real-time vehicle speed, and then pre-adjusts the damping value of the variable damping supporting rod in advance through the relation, obtained through CAE simulation analysis, between the deformation of the roof framework and the impact load of the chassis. The impact of the roof load on the roof framework is reduced, and the deformation quantity of the roof framework does not exceed the yield limit of the roof framework.

Description

Technical Field

[0001] The invention belongs to the technical field of vehicle shock absorption, and in particular relates to a roof deformation control system. Background Art

[0002] With the popularity of electric and hybrid vehicles, more and more vehicles are beginning to place batteries on the roof to optimize the vehicle's weight distribution and space utilization.

[0003] However, this design faces some challenges in practical application, especially when driving on uneven roads, such as:

[0004] 1. Impact of the roof load on the roof frame: When the vehicle is driving on an uneven road, the roof load (such as the battery) will impact the roof frame due to the bumps of the road. These impacts will not only cause the body to twist, but also produce abnormal noises, seriously affecting the comfort of the ride.

[0005] 2. Body twisting and abnormal noise: The twisting of the body will cause relative displacement between the roof frame and other body parts, which will produce abnormal noise. This abnormal noise is not only uncomfortable, but may also cover up other potential mechanical failures and affect the driving experience.

[0006] 3. Component cracking and frame fracture: In extreme cases, long-term impact and twisting may lead to fatigue accumulation of the roof frame, eventually causing component cracking or even frame fracture. These problems will not only affect the structural integrity of the vehicle, but may also bring serious safety hazards.

[0007] Currently, some vehicles on the market generally only use traditional suspension systems to absorb road impact, but these systems do not perform well when dealing with the additional impact brought by roof loads. The main reasons include:

[0008] 1. Single shock absorption system: Traditional suspension systems mainly rely on airbags and shock absorbers to absorb impact, but this shock absorption system has limited effect in dealing with the additional impact of roof load and cannot effectively control the deformation of the roof frame.

[0009] 2. Lack of intelligent control: Most existing shock absorption systems use fixed shock absorption parameters and cannot be dynamically adjusted according to different road conditions and vehicle states. This static shock absorption strategy is difficult to cope with complex road conditions, especially when driving at high speeds or under heavy loads.

[0010] 3. Lack of forward road condition perception: Traditional systems lack forward road condition perception devices and are unable to identify bumpy roads that are about to be encountered in advance, resulting in the shock absorption system being unable to prepare in advance and can only respond to impacts passively. Summary of the invention

[0011] The present invention aims at the above-mentioned problems existing in the prior art and proposes a roof deformation control system which can automatically adjust shock absorption according to real-time road conditions.

[0012] The present invention can be achieved through the following technical solutions:

[0013] A roof deformation control system, comprising:

[0014] A front road condition sensing device is used to pre-scan the road ahead and detect the upcoming bumpy sections;

[0015] The suspension system is used to absorb the first-level impact energy from the road surface and achieve the first-level shock absorption during the vehicle's driving process;

[0016] A variable damping support rod is arranged between the suspension system and the roof frame, and the variable damping support rod realizes secondary shock absorption of the roof frame by adjusting the damping value;

[0017] The vehicle controller uses the road condition data detected by the front road condition sensing device, combined with the weight of the roof load and the real-time vehicle speed to analyze and predict the impact load that the chassis will be subjected to, and then pre-adjusts the damping value of the variable damping support rod in advance based on the relationship between the roof frame deformation and the chassis impact load obtained through CAE simulation analysis.

[0018] As a further improvement of the present invention, the vehicle controller includes a data processing module, which is used to process the road condition data detected by the front road condition sensing device.

[0019] As a further improvement of the present invention, the vehicle controller also includes an analysis module, which predicts the expected deformation of the roof frame based on the road condition data transmitted by the data processing module, combined with the vehicle's current speed, the distribution of the roof load, and pre-stored vehicle body three-dimensional modeling and CAE simulation results.

[0020] As a further improvement of the present invention, the analysis module compares the predicted deformation of the roof frame with the yield limit of the roof frame to obtain the shock absorption value required by the roof frame, and then obtains the shock absorption value required by the variable damper based on the predicted shock absorption value that will be generated by the suspension system.

[0021] As a further improvement of the present invention, the vehicle controller further includes a control module, which sends an adjustment instruction to the variable damping support rod according to the required shock absorption value obtained by the analysis module.

[0022] As a further improvement of the present invention, the front road condition sensing device may adopt a laser radar, a camera, a millimeter wave radar, an ultrasonic sensor or any combination thereof.

[0023] As a further improvement of the present invention, the variable damping support rod is composed of a support rod and a variable damper, and the variable damper is arranged on one end of the support rod connected to the roof frame.

[0024] As a further improvement of the present invention, the suspension system includes an airbag and a shock absorber.

[0025] As a further improvement of the present invention, the road surface excitation transmits real-time data to the vehicle controller through sensors on the chassis.

[0026] As a further improvement of the present invention, road surface excitation is transmitted to the roof frame through the tire, the suspension system, and the variable damping support rod in sequence.

[0027] Compared with the prior art, the present invention has the following beneficial effects: by using the road condition data detected by the front road condition sensing device, combined with the weight of the roof load and the real-time vehicle speed, the impact load to which the chassis will be subjected is analyzed and predicted, and then by using the CAE simulation analysis to obtain the relationship between the deformation of the roof frame and the chassis impact load, the damping value of the variable damping support rod is pre-adjusted in advance to reduce the impact of the roof load on the roof frame and ensure that the deformation of the roof frame does not exceed its yield limit. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a structural schematic diagram of a roof deformation control system of the present invention;

[0029] Figure 2 It is a schematic diagram of the roof deformation control system of the present invention.

[0030] In the figure, 100, front road condition sensing device; 200, suspension system; 210, airbag; 220, shock absorber; 300, variable damping support rod; 310, support rod; 320, variable damper; 400, roof frame; 500, vehicle controller; 600, tire. DETAILED DESCRIPTION

[0031] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical method of the present invention, but the present invention is not limited to these embodiments.

[0032] like Figure 1-2 As shown, the present invention provides a roof deformation control system, comprising:

[0033] A front road condition sensing device 100 is used to pre-scan the road ahead and detect the bumpy road section to be encountered;

[0034] The suspension system 200 is used to absorb the first-level impact energy from the road surface and achieve the first-level shock absorption during the vehicle driving process;

[0035] The variable damping support rod 300 is arranged between the suspension system 200 and the roof frame 400. The variable damping support rod 300 realizes secondary shock absorption of the roof frame 400 by adjusting the damping value;

[0036] The vehicle controller 500 uses the road condition data detected by the front road condition sensing device 100, combined with the weight of the roof load and the real-time vehicle speed to analyze and predict the impact load that the chassis will be subjected to, and then uses the relationship between the deformation of the roof frame 400 and the chassis impact load obtained through CAE simulation analysis to pre-adjust the damping value of the variable damping support rod 300 in advance. The CAE simulation analysis is combined with the actual vehicle test to perform data correction to improve the adjustment accuracy.

[0037] The roof deformation control system provided by this embodiment has at least the following advantages:

[0038] 1. Improve driving stability: By using the front road condition sensing device 100 to identify the unevenness of the road ahead in advance, the vehicle controller 500 can pre-adjust the damping value of the variable damping support rod 300 in advance, thereby effectively reducing the impact of the roof load on the roof frame 400 and improving the driving stability of the vehicle on uneven roads.

[0039] 2. Reduce abnormal noise and component damage: The system can significantly reduce the body twisting caused by the roof load, thereby reducing the occurrence of abnormal noise. At the same time, by accurately controlling the deformation of the roof frame 400, it avoids the cracking of components and the breakage of the frame in extreme cases, thereby extending the service life of the vehicle.

[0040] 3. Improve riding comfort: The multi-stage shock absorption system and closed-loop control mechanism ensure the vehicle's smooth driving under various road conditions, significantly improving the riding comfort of passengers, especially under high-speed driving and heavy-load conditions.

[0041] 4. Enhanced safety: Through real-time monitoring and dynamic adjustment of shock absorption parameters, the system can effectively respond to sudden road conditions, improve the overall safety of the vehicle, and reduce the potential risk of accidents caused by impact.

[0042] 5. Optimize shock absorption effect: The vehicle controller 500, combined with CAE simulation analysis, can accurately predict the deformation of the roof frame 400, ensure the shock absorption effect reaches the best state, and avoid the limitations of the traditional fixed shock absorption system.

[0043] 6. Adapt to various road conditions: The system can adapt to various complex road conditions, whether it is urban roads, highways or country roads, it can provide stable shock absorption effect to ensure the performance of the vehicle in different environments.

[0044] 7. Reduce maintenance costs: By reducing damage to the roof frame 400 and related components, the system reduces the maintenance frequency and repair costs of the vehicle, saving economic expenses for users.

[0045] Preferably, the vehicle controller 500 includes a data processing module, which is used to process the road condition data detected by the front road condition sensing device 100. The specific working steps of the data processing module are as follows:

[0046] 1. Data collection: LiDAR collects three-dimensional point cloud data of the road ahead in real time.

[0047] 2. Data filtering: Remove noise data through filtering algorithms and retain valid information.

[0048] 3. Data conversion: Convert 3D point cloud data into a format suitable for analysis, such as a 2D image or numerical matrix.

[0049] 4. Feature extraction: Extract characteristic information of the road surface, such as potholes, bumps, cracks, etc.

[0050] Preferably, the vehicle controller 500 further includes an analysis module, which predicts the expected deformation of the roof frame 400 according to the road condition data transmitted by the data processing module, combined with the current speed of the vehicle, the distribution of the roof load, and the pre-stored three-dimensional modeling and CAE simulation results of the vehicle body;

[0051] The analysis module compares the predicted deformation of the roof frame 400 with the yield limit of the roof frame 400 to obtain the required damping value of the roof frame 400, and then obtains the required damping value of the variable damper 320 based on the predicted damping value to be generated by the suspension system 200.

[0052] Specifically, the working steps of the analysis module are as follows:

[0053] 1. Data fusion: The road condition data of the lidar is integrated with the vehicle’s current speed, the distribution of the roof load and other information.

[0054] 2. CAE simulation analysis: using the pre-existing vehicle body three-dimensional modeling and computer-aided engineering (CAE) simulation results, a relationship model between the deformation of the roof frame 400 and the road surface excitation is established.

[0055] 3. Deformation prediction: Based on the fused data and simulation model, the expected deformation of the roof frame 400 on the bumpy road section that will be encountered is predicted.

[0056] 4. Yield limit comparison: The predicted deformation is compared with the yield limit of the roof frame 400 to determine the required shock absorption value.

[0057] 5. Calculation of shock absorption value: Calculate the shock absorption value required by the variable damping support rod 300 based on the predicted shock absorption value to be generated by the suspension system 200.

[0058] Preferably, the vehicle controller 500 further includes a control module, which sends an adjustment instruction to the variable damping support rod 300 according to the required shock absorption value obtained by the analysis module.

[0059] Specifically, the working steps of the control module are as follows:

[0060] 1. Instruction generation: Generate corresponding adjustment instructions based on the shock absorption value calculated by the analysis module.

[0061] 2. Sending instructions: sending adjustment instructions to the variable damping support rod 300 via the vehicle network (such as CAN bus).

[0062] 3. Real-time adjustment: The variable damping support rod 300 adjusts its damping value in real time according to the received instructions to achieve secondary shock absorption.

[0063] 4. Feedback mechanism: The actual position and damping value of the variable damping support rod 300 are fed back to the vehicle controller 500 through the sensor, forming a closed-loop control circuit to ensure that the shock absorption effect reaches the best state.

[0064] That is to say, by setting up the front road condition sensing device 100, combined with the data processing module, analysis module and control module of the vehicle controller 500, the driving stability and safety of the vehicle on bumpy roads can be significantly improved, and the impact of the roof load on the roof frame 400 can be reduced.

[0065] Preferably, the variable damping support rod 300 is composed of a support rod 310 and a variable damper 320. The variable damper 320 is arranged on one end where the support rod 310 is connected to the roof frame 400. The variable damper 320 is controlled by the control module of the vehicle controller 500 to adjust the damping value. The variable damper 320 can adjust the damping by controlling the extension and contraction of the damping or adjusting the size of the internal pressure.

[0066] Preferably, the front road condition sensing device 100 can adopt laser radar, camera, millimeter wave radar, ultrasonic sensor or any combination thereof. In this embodiment, laser radar is mainly used to realize the perception of the real-time road condition ahead. Laser radar has the advantages of high-precision detection, long-distance perception, real-time performance, multi-target recognition, and strong anti-interference ability.

[0067] Preferably, the suspension system 200 includes an airbag 210 and a shock absorber 220. The entire suspension system 200 is mainly used to absorb impact energy from the road surface and protect the wheels, axles and other parts of the vehicle body, but at the same time it also reduces the impact energy transmitted to the roof frame 400, thereby achieving a primary shock absorption effect on the roof frame 400. In combination with the real-time self-adjusting variable damper 320, secondary shock absorption of the roof frame 400 is achieved, ensuring that the vehicle can effectively respond to sudden road conditions and ensuring that the deformation of the roof frame 400 will never exceed its yield limit.

[0068] Preferably, the road excitation transmits real-time data to the vehicle controller 500 through sensors on the chassis (such as acceleration sensors, displacement sensors, pressure sensors, etc.). These sensors can detect the road impact and vibration conditions that the vehicle is subjected to during driving, and they play the following roles:

[0069] 1. Real-time monitoring: The sensors on the chassis can detect the impact and vibration of the road surface during driving in real time, and provide high-precision real-time data. The acquisition of real-time data enables the vehicle controller 500 to adjust the shock absorption parameters in time to ensure that the vehicle can maintain the best shock absorption effect under various road conditions.

[0070] 2. Improve shock absorption accuracy: Through real-time data, the vehicle controller 500 can more accurately predict the expected deformation of the roof frame 400, thereby more accurately adjusting the damping value of the variable damping support rod 300. This precise adjustment can effectively reduce the impact of the roof load on the roof frame 400 and improve the response speed and accuracy of the shock absorption system.

[0071] 3. Enhance system reliability: The sensors on the chassis can provide multi-dimensional data, including acceleration, displacement and pressure. The comprehensive analysis of these data makes the system more reliable. The fusion of multi-sensor data can reduce the error of a single sensor and improve the stability of the system.

[0072] 4. Optimize shock absorption effect: Real-time data feedback enables the closed-loop control system to dynamically adjust the shock absorption parameters to ensure the best shock absorption effect. Through real-time adjustment, the system can better cope with complex road conditions and improve the vehicle's driving stability and ride comfort.

[0073] Preferably, the road excitation is transmitted to the roof frame 400 in sequence through the tire 600, the suspension system 200, and the variable damping support rod 300. In this process, a multi-stage shock absorption system is formed by the suspension system 200 and the variable damping support rod 300 to effectively reduce the impact of the roof load on the roof frame 400.

[0074] The technical means disclosed in the scheme of the present invention are not limited to the technical means disclosed in the above technical means, but also include technical schemes composed of any combination of the above technical features. The above is a specific implementation of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications are also regarded as the protection scope of the present invention.

[0075] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0076] In addition, in the present invention, descriptions such as "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0077] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0078] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A roof deformation control system, characterized in that: include: A front road condition sensing device is used to pre-scan the road ahead and detect the upcoming bumpy sections; The suspension system is used to absorb the first-level impact energy from the road surface and achieve the first-level shock absorption during the vehicle's driving process; A variable damping support rod is arranged between the suspension system and the roof frame, and the variable damping support rod realizes secondary shock absorption of the roof frame by adjusting the damping value; The vehicle controller uses the road condition data detected by the front road condition sensing device, combined with the weight of the roof load and the real-time vehicle speed to analyze and predict the impact load that the chassis will be subjected to, and then pre-adjusts the damping value of the variable damping support rod in advance based on the relationship between the roof frame deformation and the chassis impact load obtained through CAE simulation analysis.

2. A roof deformation control system according to claim 1, characterized in that: The vehicle controller includes a data processing module, which is used to process the road condition data detected by the front road condition sensing device.

3. A roof deformation control system according to claim 2, characterized in that: The vehicle controller also includes an analysis module, which predicts the expected deformation of the roof frame based on the road condition data transmitted by the data processing module, combined with the current speed of the vehicle, the distribution of the roof load, and the pre-stored three-dimensional modeling and CAE simulation results of the vehicle body.

4. A roof deformation control system according to claim 3, characterized in that: The analysis module compares the predicted deformation of the roof frame with the yield limit of the roof frame to obtain the required damping value of the roof frame, and then obtains the required damping value of the variable damper based on the predicted damping value to be generated by the suspension system.

5. A roof deformation control system according to claim 3, characterized in that: The vehicle controller also includes a control module, which sends an adjustment instruction to the variable damping support rod according to the required shock absorption value obtained by the analysis module.

6. A roof deformation control system according to claim 1, characterized in that: The front road condition sensing device may adopt a laser radar, a camera, a millimeter wave radar, an ultrasonic sensor or any combination thereof.

7. A roof deformation control system according to claim 1, characterized in that: The variable damping support rod is composed of a support rod and a variable damper, and the variable damper is arranged on one end of the support rod connected to the roof frame.

8. A roof deformation control system according to claim 1, characterized in that: The suspension system includes an air bag and a shock absorber.

9. A roof deformation control system according to claim 1, characterized in that: The road surface excitation transmits real-time data to the vehicle controller through sensors on the chassis.

10. The roof deformation control system according to claim 1, characterized in that: The road surface excitation is transmitted to the roof frame through the tire, the suspension system, and the variable damping support rod in sequence.

Images