When we judge a car, the word "noisy" is often taken for reference. Wind noise, fetal noise, engine noise, vibration, etc. are all counted in the category of “noisyâ€. So where does a car “have no noise†and where does it come from? Next, we will discuss how the excellent NVH design was made through a technology decryption conference held by Dongfeng Nissan Teana, which is known for its comfort and silence.
â— What is NVH?
NVH is an abbreviation for Noise, Vibration, and Harshness, which can be heard or felt. Any one of them will cause significant discomfort to the driver and passenger when reaching a certain level. Through these transmitted noises and vibrations, the comfort performance of a car is judged.
The route of transmission is also well understood, for example, the sound of our talking through the air, the vibrations transmitted through the seat, and so on.
â— What is the level of Xintianyi NVH currently at the same level?
As the benchmark model for comfort and quiet in its class, Xintianhao's NVH technology is bound to have a lot of excels.
â— Interpretation of Tianqi NVH Technology
The NVH technology summarizes a total of three points, namely NVH development process, NVH development resources, and NVH control scheme.
I. NVH Development Process
The NVH development process generally follows these steps: Do a good job of market research in the early stages of development to confirm the car environment. Set goals and aggregate their needs for target customers. At the same time, it conducted market reverse investigations on old models, and then targeted improvements were made to the new models.
After confirming the competitive goal, according to the target, we will formulate the target of all parts of the entire vehicle and finally predict whether or not the performance requirement is achieved.
Second, NVH development resource workers want to do a good job, we must first sharpen its tools, due to the complexity of the vehicle parts complex, to develop a good NVH design hardware requirements are very high.
Third, NVH control technology program
1. Sound source control:
As the source of maximum noise and vibration, the engine is naturally necessary to control the sound source.
2, the transfer path optimization:
3, wind sound optimization:
4, acoustic package optimization:
2 Dongfeng Nissan Technology Center Experience
â— Technical Center field experience
Similarly, the use of colored smoke can detect the exact location of the leak. The leakage level of Xintianyu is generally controlled at 29 square centimeters, which means that all the pores of the entire vehicle add up to about 29 square centimeters. Knowing the exact values ​​of other products at the same level, it is not a good comparison here.
â— Summary
I believe that most people are like me, obviously underestimating the complexity of the vehicle's NVH design. Through the decryption of the Tianzhu Silent Technology, we have a preliminary understanding of NVH's design process. The top NVH performance is absolutely paid. Inconceivable costs, I also suggest that the majority of potential owners to buy their favorite products at the same time pay more attention to NVH performance, after all, this is related to their daily driving experience, related to the feelings of driving every day.
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