As a function to protect occupant safety, anti-pinch is getting more and more attention from consumers and has become a highlight in automobile sales. However, the problem of anti-pinch failure often occurs in practical use, which brings serious after-sales complaints and economic claims, and may cause a large number of vehicle recalls. In order to solve the antipinch failure problem, this paper carries out an in-depth study on the principle of window anti-pinch, the control strategy, the logical algorithm and the control strategy for each calibration condition. Compare the difference between the motor operation curves of the faulty vehicle and the calibrated vehicle, and find out the reasons for the failure of the anti-pinch of the faulty vehicle. According to the failure reason, the controller software algorithm is deeply optimized. Taking a certain model as an example, the complaint rate of after-sales 12mis significantly reduced, proving that the optimization measures are effective, and the theories and measures in this paper can be widely used in the development and anti-pinch calibration of new models in the future.
This study focuses on a certain vehicle model and analyzes the noise problem in the edge area of the front cover of the car through wind tunnel tests and Fluent numerical simulation software. Firstly, numerical calculations and analysis were conducted using fluid dynamics theory, acoustic theory, and other methods. Secondly, wind tunnel validation was conducted to analyze the impact mechanism of aerodynamic flow field on the noise of the front cover of automobiles. By comparing the simulation results of different design schemes, a simplified model was used to solve a type of method and solution for eliminating the edge noise of the front cover. Explored the mechanism of reducing noise at the front edge of the front cover of vehicles with through grille lights, studied the structure and position of the front grille light area, and applied it to eliminate wind noise in vehicle models. The simulation and experimental results show that the protruding diversion structure passing through the tail lights can effectively avoid the generation of wind noise at the front of the front cover, reduce the sound pressure value at the front cover, and reduce the noise to a maximum of 19 dB.
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