What are the factors that determine the comfort of the car?

Since all kinds of ldquo; high-top rdquo; secret weapons rdquo; how is it?
? Who said it is not counted, the engineer needs to get two data from the test machine and expert.

In the Nissan factory, there are a variety of seat testing machines, simulated, have analog ride area, simulated load, ldquo; simple rdquoThe research and development cost of a seat is still quite high.

But the machine is more, the seat is ultimately giving people, so an expert opinion is also indispensable. These experts have a very interesting idea in them, and they should be called mdash; mdash; ldquo; 精 屁 rdquo ;. So they are very ldquo; moment of thin rdquo; A ldquo; unhappy rdquo; This also illustrates from the side, why these mainstream B cars can have such a comfortable ride experience.

The seat has good comfort, NVH is also in place, if there is poor sound insulation, all kinds of wind-to-noise, road noise is in the ear, that is also disappointing. NVH is the abbreviation of three letters, where n represents ldquo; noise (noise) rdquo; v represents ldquo; vibration rdquo;, H is ldquo; Harshness) rdquo ;.

Nissan's models also have a strict NVH development process. In the early stage of development, the manufacturer will conduct market surveys, study target customers' habits, and use the car environment. For example, Tianzhu is a B-class car that is a family business. According to its positioning, naturally, the control of NVH is very strict. If it is Xima, because its positioning is more spoken, it may be more pursuit of "the effect of NVH will be more pursued".

In addition to a strict development process, the supporting development resources are also important, such as the test mute hub half-measuring room, in which the wall is laid on this muffler. Materials with very sound absorption, the entire silence room has no reflection, almost absolute mute in the room. It is only possible to test the rigorous and testing accuracy of development under this near-laboratory adjustment.

Brick uncle experienced the sound insulation effect of Scorpio in the muffler, shake the window, the data displayed by the forage is 33.9dB, depending on the noise standard, at 30 ~ There is a quiet normal environment between 40dB. If the window is shaken, 70.3dB is displayed, so the sound insulation effect of Scorpio is still very effective.

With a good test environment, you can better have the source of interference, NVH development is also more proposed. If it is a large wind-to-noise, the Nissan engineer's approach is to upgrade the front windshield of Scorpio into acoustic sound, which can improve the high frequency region noise reduction.

And the control of the source, in general, the vibration of the engine and accessories is unavoidable, and the metal is suspended will exacerbate these noise, and Nissan's solution is replaced by high strength hardness.The resin is suspended, so that it can significantly reduce the occurrence of noise.